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JP2006295669

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2006295669
The present invention provides a voice reproduction apparatus capable of performing
reproduction without the user having to miss audio data even if a loud sound is generated
around the reproduction of audio data such as foreign language learning using the audio
reproduction apparatus. Do. SOLUTION: A storage unit 11 for storing voice data, a microphone
13 for collecting surrounding sound, and a predetermined threshold Th1 are compared with the
level of surrounding sound outputted from the microphone and a comparison result is output.
There is a determination unit 14, a control unit 15 for controlling reproduction, a reproduction
unit 12 for reproducing audio data of the storage unit 11 under the control of the control unit
15, and a headphone 16 for audio output, and the surrounding sound is loud If it stops playing, it
becomes smaller and resumes playing. It is also possible to resume playback a little back on
resumption. [Selected figure] Figure 1
Voice playback device
[0001]
The present invention relates to an audio reproduction apparatus, and more particularly to an
audio reproduction apparatus used for listening to foreign language learning that can be
controlled based on an external audio signal obtained from a microphone, for example, a CD
player, an MP3 player, a portable device It relates to the telephone etc.
[0002]
In trains and the like, there are many people who are learning foreign language listening etc.
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using audio playback devices such as portable music players (CD players, MP3 players, mobile
phones etc).
For example, in a train, a portable music player user listens to audio using headphones, and is
always used in a state where large and small noise is present outside. However, the headphones
used are often small ones with an emphasis on portability, and can not sufficiently block external
noise, and if a large amount of external noise is generated, it interferes with listening learning.
Sometimes. Although some users respond by increasing the volume extremely to prevent
learning from being disturbed by noise, it is natural that external noise is leaked to the outside,
and loud noise leaks to the surroundings. It is annoying. In addition, it may not be a desirable
solution because it may damage the person's ear.
[0003]
Therefore, as a conventional portable stereo device, it has an earphone or headphone that
outputs voice and music, and a microphone for sound collection, and based on the audio signal
input through the microphone, the white stationary sound is regarded as noise. By generating
and superimposing the estimated sound that cancels it out, stationary noise is canceled and it
becomes easy to hear it, and when the colored sound such as the alarm sound is input, the
colored sound is judged and the colored sound is output without canceling it. There has been
proposed a portable music reproducing apparatus capable of easily listening to steady noise and
necessary colored sounds such as alarm sounds (see, for example, Patent Document 1). Japanese
Patent Application Laid-Open No. 5-145985 (Page 6, FIG. 1)
[0004]
However, in the above-described conventional configuration, although it is possible to suppress
stationary noise in the surroundings during voice reproduction, but not to cancel out colored
sounds such as alarm sounds, it is possible to prevent other stationary If a loud sound such as a
passing sound is short, the loud sound can not be canceled and can be heard. In the case of
music, it is advantageous in terms of ease of listening to reduce steady noise even if loud noises
such as alarm sounds and train passing noises enter slightly in a short time while listening to
music, There is no problem if you miss it, especially for a short time. However, if you are listening
for learning, if there are loud sounds such as alarm sounds and misplaced sounds and parts of
the sentence can not be heard, you will not be able to understand and your learning may be
hindered. was there.
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2
[0005]
In order to solve the above-mentioned conventional problems, the audio reproduction apparatus
according to the present invention compares a storage unit for storing audio data, a microphone
for collecting sound, and a signal level of sound output from the microphone with a
predetermined threshold. And a determination unit that outputs the result, and a reproduction
unit that reproduces the audio data based on the control of the control unit, and based on the
comparison result output from the determination unit, pausing and resuming the reproduction of
the audio data The configuration is to control.
[0006]
According to this configuration, the sound reproducing apparatus collects surrounding sound
with the microphone during reproduction of sound data such as listening learning of a foreign
language stored in the storage unit, and the level of the surrounding sound is equal to or more
than a predetermined threshold When the result is output from the determination unit, the audio
data is paused, and when the level of the surrounding sound becomes lower than a
predetermined threshold, the pause can be canceled and the reproduction can be started.
Therefore, during reproduction of the audio data, the user suspends the audio data while a sound
equal to or greater than a predetermined threshold is generated around the user, and resumes
reproduction when the surrounding sound becomes lower than the threshold. Even if a
temporary loud sound is generated around the user, it is possible to eliminate the inaudible
portion of the audio data being reproduced.
[0007]
The audio reproduction apparatus according to the present invention further includes a storage
unit for storing audio data, and a microphone for collecting sound and a level of sound output
from the microphone and a first predetermined threshold compared with each other to output a
result. A second determination unit that compares the signal level of the sound output from the
microphone with a predetermined second threshold value and outputs the result, a control unit
that controls reproduction of audio data, and a storage unit The audio data stored in the memory
is reproduced based on the control of the control unit, and the audio data is paused and output
from the second judgment unit based on the comparison result output from the first judgment
unit. Resumption of reproduction of audio data is controlled based on the comparison result.
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[0008]
According to this configuration, the audio reproduction device collects the surrounding sound
with the microphone during reproduction of the audio data such as listening learning of the
foreign language stored in the storage unit, and the sound level of the surrounding sound is
predetermined. The audio data is paused when the result that is equal to or greater than the
threshold is output from the determination unit, and the pause is canceled and the reproduction
is started when the level of the surrounding sound becomes lower than a predetermined second
threshold. can do.
Therefore, during reproduction of the audio data, the audio data is paused while a sound equal to
or greater than a predetermined first threshold is generated in the surroundings, and the
surrounding sound becomes equal to or less than a predetermined second threshold. By
resuming the reproduction, the user can eliminate a portion that can not be heard even if a loud
sound is generated around it. In addition, even when the surrounding sound increases or
decreases at a level close to the first threshold, playback and pause continue continuously by
adjusting the difference between the first threshold and the second threshold. And other
unpleasant conditions can be eliminated.
[0009]
Further, the audio reproduction apparatus according to the present invention compares the
storage unit storing the audio data, the microphone collecting the sound, the level of the sound
output from the microphone with a predetermined first threshold, and outputs the result. A
determination unit, a second determination unit that compares the signal level of sound output
from the microphone with a predetermined second threshold, and outputs the result, a control
unit that controls reproduction of audio data, and storage A reproduction unit that reproduces
the audio data stored in the unit based on the control of the control unit, and based on the
comparison result output from the first determination unit, suspending reproduction of the audio
data; The reproduction position of the audio data is returned to the front by a predetermined
time based on the comparison result output from the determination unit, and then the
reproduction of the audio data is resumed.
[0010]
According to this configuration, the audio reproduction device collects the surrounding sound
with the microphone during reproduction of the audio data such as the foreign language
listening learning stored in the storage unit, and the first threshold whose surrounding sound
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level is predetermined. If it is determined by the determination unit that the above process is
performed, the audio data is paused, and if the surrounding sound level becomes lower than a
predetermined second threshold, the reproduction position is advanced by a predetermined time.
By resuming and returning to a new sound, there is no loss of listening to the audio data even
when the sound is paused due to a loud sound generated around it, and even when stopped in
the middle of sounding, it is reproduced from the position returned to the previous time.
Reproduction can be resumed easily.
[0011]
Further, the audio reproduction apparatus according to the present invention compares the
storage unit storing the audio data, the microphone collecting the sound, the level of the sound
output from the microphone with a predetermined first threshold, and outputs the result. A
determination unit, a second determination unit that compares the level of the sound output from
the microphone with a predetermined second threshold, and outputs the result, a control unit
that controls reproduction of audio data, and a storage unit The reproduction unit performs
reproduction based on the control of the control unit, and the silence detection unit detects the
silence state in the reproduction unit, and the comparison result output from the first
determination unit The playback of audio data is paused on the basis of the comparison result
output from the second determination unit and the output result of the silence detection unit at
the time of suspension, and the playback position of the audio data for a predetermined time is
set ahead. After returning to, playback of audio data is resumed.
[0012]
According to this configuration, the audio reproduction device collects the surrounding sound
with the microphone during reproduction of the audio data such as the foreign language
listening learning stored in the storage unit, and the first threshold whose surrounding sound
level is predetermined. If it is determined by the output result of the determination unit that the
above is the result of the determination unit, the audio data is paused, and if the level of the
surrounding sound becomes lower than a predetermined second threshold, silence is detected at
the time of suspension Based on the output result of the unit, if the silence period is a silence
interval which is equal to or longer than a predetermined time, restart the voice data from the
paused position, and if it is not a silence interval at the pause, voice data Reproduction can be
performed from a position returned before a predetermined time.
As a result, reproduction is resumed after being paused due to a loud sound generated around, if
the audio data is a silent section when paused, playback is performed without returning the
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playback position, and if it is not a silent section, it is performed in advance. Since playback is
performed from the position returned before the set time, playback can be resumed easily
without having to return the playback position in vain.
[0013]
Further, the audio reproduction apparatus according to the present invention compares the
storage unit storing the audio data, the microphone collecting the sound, the level of the sound
output from the microphone with a predetermined first threshold, and outputs the result. A
determination unit, a second determination unit that compares the level of the sound output from
the microphone with a predetermined second threshold, and outputs the result, a control unit
that controls reproduction of audio data, and a storage unit The reproduction unit performs
reproduction based on the control of the control unit, and the silence detection unit detects the
silence state in the reproduction unit, and the comparison result output from the first
determination unit Based on the pause of the reproduction of the audio data and the comparison
result output from the second determination unit, the position of the last silent interval is
returned to, and then the reproduction of the audio data is resumed.
[0014]
According to this configuration, the surrounding sound is collected by the microphone during
reproduction of voice data such as foreign language listening learning stored in the storage unit,
and the surrounding sound level is equal to or higher than a predetermined first threshold value.
When it becomes clear from the result of the judgment unit, the audio data is paused, and when
the level of the surrounding sound becomes lower than the second predetermined threshold, the
audio data is silenced in the last predetermined time width. By returning the playback position
back to the silent section where it has continued and then resuming, even if it is paused by a loud
sound generated around it, the audio data will not be missed, and it will be played from the
previous silent position. Reproduction can be resumed in an easily audible manner.
[0015]
The audio reproduction apparatus according to the present invention further includes: a storage
unit for storing additional data including data associated with an audio data and a mark set at an
arbitrary reproduction position of the audio data and audio data; A first determination unit that
compares the level of the sound output from the microphone with a predetermined first
threshold and outputs the result, the level of the sound output from the microphone, and a
predetermined second threshold A second determination unit that compares and outputs the
result, a control unit that controls reproduction of audio data, and a reproduction unit that
reproduces audio data stored in the storage unit based on control of the control unit; Pause of
reproduction of audio data based on the comparison result output from the first determination
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unit and the reproduction position of audio data at the position of the immediately preceding
mark based on the comparison result output from the second determination unit Return to and
resume playback And it formed.
[0016]
According to this configuration, the surrounding sound is collected by the microphone during
reproduction of voice data such as foreign language listening learning stored in the storage unit,
and the surrounding sound level is equal to or higher than a predetermined first threshold value.
When it becomes clear from the comparison result of the determination unit, the audio data is
temporarily stopped, and when the level of the surrounding sound becomes lower than a
predetermined second threshold, the audio data is placed at the position of the previously
determined mark. By returning the playback position to the beginning and then resuming it, it
will not miss listening to the audio data even if it is paused by a loud sound generated around it,
and it will be easy to hear because it will be played back from the previously set mark position.
You can resume playback.
[0017]
According to the audio reproduction apparatus of the present invention, even if a loud sound is
generated in the periphery during reproduction of audio data such as foreign language listening
learning, while the ambient sound is collected by the microphone and the loud sound is
generated, By temporarily stopping the reproduction and resuming the reproduction after the
loud sound disappears, it is possible to perform the reproduction without the part the user
misses on the way.
[0018]
In addition, when playback is stopped in the middle of a sentence by returning to a
predetermined time or a silent interval immediately before or a position of a mark immediately
before, when playback is stopped in the middle of a sentence, playback resumes from the middle
of sound generation of audio data. Being able to avoid difficult things to hear.
[0019]
Hereinafter, a sound reproduction apparatus according to a best mode for carrying out the
present invention will be described with reference to the drawings.
[0020]
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First Embodiment FIG. 1 is a block diagram of an audio reproduction apparatus according to a
first embodiment of the present invention.
In FIG. 1, a storage unit 11 for storing voice data, which is a teaching material such as foreign
language listening learning, a microphone 13 for collecting surrounding sound, a predetermined
threshold Th1 and a surrounding sound level from the microphone 13 Of the audio data stored
in the storage unit 11 based on the control of the control unit 15, the start or pause of the
reproduction of the audio data stored in the storage unit 11, And a headphone 16 for converting
an output signal from the reproduction unit 12 into sound and outputting the sound.
The control unit 15 sends a PLAY signal to the reproduction unit 12.
Also, the audio data may be data including data of audio information and other additional data.
[0021]
FIG. 2 shows the relationship between the level of the ambient sound, the threshold value Th1
and the reproduction control according to the first embodiment of the present invention.
In FIG. 2, the time axis shows the passage of time from left to right, Th1 indicates a
predetermined threshold, the ambient sound level indicates the signal level of the surrounding
sound collected by the microphone 13, and the PLAY signal is output from the control unit 15 It
is a control signal of reproduction which is reproduced at H and is stopped at L.
As Th1 is set in advance a value of an audio level at which the audio data being reproduced
becomes difficult to hear when the surrounding sound becomes Th1 or more.
The determination unit 14 compares the level of the surrounding sound collected by the
microphone 13 with Th1 during voice data reproduction, and outputs a signal indicating that the
level of the surrounding sound from the microphone exceeds Th1 when the level of the
surrounding sound exceeds Th1. Output
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When the control unit 15 receives the signal of the comparison result from the determination
unit 14, the control unit 15 sets the PLAY signal to L to stop the reproduction, since there is a
possibility that the audio data can not be heard.
Thereafter, when the level of the ambient sound becomes equal to or lower than Th1, the control
unit 15 changes the PLAY signal to H to resume reproduction.
[0022]
According to the audio reproduction apparatus of the first embodiment of the present invention,
reproduction is paused when the surrounding sound is equal to or greater than a predetermined
threshold when reproducing the sound, and reproduction is performed if the surrounding sound
becomes smaller than the threshold By resuming, it is possible to provide an audio reproduction
device that does not miss the audio data being reproduced even if the surrounding sound is loud.
[0023]
Second Embodiment Next, a second embodiment will be described.
In the second embodiment of the present invention, when the level of the sound generated
around is close to the threshold for determining the stop of the reproduction, the first threshold
for determining the stop of the reproduction and the second for resuming the reproduction. An
audio reproduction apparatus that performs control using a threshold will be described.
[0024]
FIG. 3 shows a block diagram of an audio reproduction apparatus according to a second
embodiment of the present invention.
In FIG. 3, a storage unit 11 for storing voice data, which is a teaching material such as foreign
language listening learning, a microphone 13 for collecting surrounding sound, a predetermined
threshold Th1 and a surrounding sound level from the microphone 13 , And a comparison
between the predetermined threshold value Th2 and the level of the surrounding sound from the
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microphone 13 for resuming the reproduction. The second determination unit 31 which outputs
the result, the control unit 32 which controls the reproduction of audio data, and the
reproduction and suspension of the audio data stored in the storage unit 11 based on the control
of the control unit 32 The playback unit 12 and the headphones 16 that convert the output
signal from the playback unit into sound and output the sound are configured.
[0025]
FIG. 4 shows the relationship between the level of the ambient sound, the threshold value Th1,
the threshold value Th2, and the reproduction control according to the second embodiment of
the present invention. In FIG. 4, the time axis indicates the passage of time from left to right, Th1
and Th2 indicate predetermined threshold values, the ambient sound level indicates the signal
level of the surrounding sound collected by the microphone 13, and the PLAY signal indicates
the control unit 32. It is a control signal of reproduction to be reproduced by H output from L
and to stop reproduction by L. As Th1, a value of a level at which the audio data being
reproduced becomes difficult to hear when the surrounding sound becomes Th1 or more is set in
advance. Th2 is a value at which the audio data being reproduced can be heard when the
surrounding sound becomes less than Th2, and a value lower than Th1 is set in advance (Th1>
Th2). The first determination unit 14 compares the level of the surrounding sound collected by
the microphone 13 with the Th1 during voice data reproduction, and indicates that the level of
the surrounding sound from the microphone exceeds the Th1 when the level becomes Th1 or
more. Output the signal of the comparison result. Similarly, the second determination unit 31
compares the level of the surrounding sound collected by the microphone 13 with Th2 and that
the level of the surrounding sound from the microphone is lower than Th2 when the level of the
surrounding sound is less than Th2. Output the resulting signal. When the control unit 32
receives the signal of the determination result from the first determination unit 14, there is a
possibility that the audio data can not be heard, so the PLAY signal is set to L and the
reproduction is stopped. Then, when the level of the ambient sound becomes Th2 or less and the
signal of the comparison result from the second determination unit 31 is received, the control
unit 32 resumes the reproduction with the PLAY signal set to H.
[0026]
Further, two types of threshold values, threshold value Th1 for stopping reproduction and
threshold value Th2 for resuming reproduction, are provided, and a further improvement over
the first embodiment will be described using FIG. FIG. 5 shows the operation of the control signal
when the surrounding sound collected by the microphone 13 has a level close to Th1 when a
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loud sound is generated in the configuration of the first embodiment. In FIG. 5, the ambient
sound level when a loud sound is generated is once lower than Th1, and then shows the level of
rising and lowering around Th1 again. As described above, the motion of repeating the HL is
repeated, and the reproduction and the stop are repeated at short intervals, which makes it
difficult for the user of the sound reproduction apparatus to hear. Therefore, by using two kinds
of threshold values Th1 and Th2 and setting the difference between Th1 and Th2 in advance, it is
possible to suppress an operation in which reproduction and stop are repeated in a short time
due to a change in the level of ambient sound. It is supposed to be.
[0027]
According to the audio reproduction apparatus of the second embodiment of the present
invention, when the level of the ambient sound is equal to or more than the predetermined first
threshold in the audio reproduction by having two types of thresholds, the reproduction is
paused and By resuming playback when the sound of the signal falls below a second
predetermined threshold, the sound being played back may be interrupted many times, even if
the surrounding sound is loud and the level is near the threshold at which playback is stopped. It
is possible to provide an audio playback device that is easy to hear and does not have.
[0028]
Third Embodiment A third embodiment will now be described.
In the third embodiment of the present invention, an apparatus will be described which performs
determination on surrounding sound and pauses playback, and then resumes playback after
returning the playback position forward from the paused position.
[0029]
FIG. 6 shows a block diagram of an audio reproduction apparatus according to a third
embodiment of the present invention. In FIG. 6, a storage unit 11 for storing voice data, which is
a teaching material such as foreign language listening learning, a microphone 13 for collecting
surrounding sound, a predetermined threshold Th1 and the level of surrounding sound from the
microphone 13 , And a comparison between the predetermined threshold value Th2 and the level
of the surrounding sound from the microphone 13 for resuming the reproduction. Based on the
control of the control unit 62, the second determination unit 31, which outputs the result, the
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control unit 62, which controls the reproduction of audio data, and the audio data stored in the
storage unit 11, advances the reproduction start or reproduction position. And a headphone 16
for converting an output signal from the reproducing unit into sound and outputting the sound.
In particular, the control unit 62 sends out the REW signal to the reproduction unit 61 in
addition to the PLAY signal.
[0030]
FIG. 7 shows the relationship between the level of the ambient sound, the threshold value Th1,
the threshold value Th2, and the reproduction control according to the third embodiment of the
present invention. In FIG. 7, the time axis indicates the passage of time from left to right, Th1 and
Th2 indicate predetermined threshold values, the ambient sound level indicates the signal level
of the surrounding sound collected by the microphone 13, and the PLAY signal indicates the
control unit 62. Reproduction control signal which is output from H and reproduced at H and
stops reproduction at L, REW signal is a control signal which is output from control unit 62 and
returns reproduction position to H at H, trew is reproduction position by REW signal Is a
predetermined time to return the As Th1, a value of a level at which the audio data being
reproduced becomes difficult to hear when the surrounding sound becomes Th1 or more is set in
advance. Th2 is a value at which the audio data being reproduced can be heard when the
surrounding sound becomes equal to or less than Th2, and a value lower than Th1 is set in
advance. When trew stops playback at Th1 and resumes playback at Th2, if it resumes playback
at the position where playback was stopped as it is difficult to hear voice data that is in the
middle of the pronunciation of a sentence, it is difficult to hear the playback position ahead It is
determined in advance to resume and resume. The determination unit 14 compares the level of
the surrounding sound collected by the microphone 13 with Th1 during voice data reproduction,
and the comparison result indicating that the level of the surrounding sound from the
microphone exceeds the Th1 when the level becomes Th1 or more. Output a signal. Similarly, the
second determination unit 31 compares the level of the surrounding sound collected by the
microphone 13 with Th2 and that the level of the surrounding sound from the microphone is
lower than Th2 when the level of the surrounding sound is less than Th2. Output the resulting
signal. When the control unit 62 receives the signal of the determination result from the first
determination unit 14, there is a possibility that the audio data can not be heard, so the PLAY is
set to L to stop the reproduction. Then, when the level of the ambient sound becomes equal to or
lower than Th 2 and the signal of the comparison result from the second determination unit 31 is
received, the control unit 62 controls the REW signal to be H during trew and control to return
the reproduction position to the front. Do against After the lapse of trew, the control unit 62 sets
the REW signal to L and stops the control to return the reproduction position to the front, and
sets the PLAY signal to H to restart the reproduction.
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[0031]
According to the audio reproduction device of the third embodiment of the present invention,
when the level of the ambient sound is equal to or higher than the predetermined first threshold,
the reproduction is paused and the ambient sound is equal to or lower than the predetermined
second threshold. In this case, the playback position is returned to a predetermined time before
resuming playback, so that the sound data being played back is reproduced even if the
surrounding sound is loud and playback is stopped, even if it is in the middle of a sentence or
pronunciation. It is possible to provide an audio reproduction device that is easy to hear when
resuming reproduction without missing the way.
[0032]
Fourth Embodiment A fourth embodiment will now be described.
In the fourth embodiment of the present invention, after determination is made on surrounding
sound and playback is paused, if the playback position at the time of the pause is silent, the
playback position is not returned to the front, otherwise it is temporarily An audio reproduction
apparatus will be described in which reproduction is resumed after moving the reproduction
position forward from the stopped position.
[0033]
FIG. 8 shows a block diagram of an audio reproduction apparatus according to a fourth
embodiment of the present invention. In FIG. 8, a storage unit 11 for storing voice data, which is
a teaching material such as foreign language listening learning, a microphone 13 for collecting
surrounding sound, a predetermined threshold Th1 and the level of surrounding sound from the
microphone 13 , And a comparison between the predetermined threshold value Th2 and the level
of the surrounding sound from the microphone 13 for resuming the reproduction. Based on the
control of the control unit 82, the second determination unit 31 that outputs the result, the
control unit 82 that controls the reproduction of audio data, and the start of reproduction
position of the audio data stored in the storage unit 11 The playback unit 81 performs
resumption after returning to the above, a silence detection unit 83 that detects a silent section
in the playback unit 81, and a headphone 16 that converts an output signal from the playback
unit 81 into sound and outputs the sound.
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[0034]
The control for temporarily stopping the reproduction of the sound of the sound reproduction
apparatus according to the fourth embodiment of the present invention is the same as in the first
to third embodiments, and the description will be omitted. The silence detection unit 83 monitors
the audio signal reproduced by the reproduction unit 81, detects a section not satisfying the
predetermined threshold value Th3 as a silent section, and transmits the silent section to the
control unit 82. ing.
[0035]
FIG. 9 shows the relationship between the level of the reproduced sound, the threshold value Th3
for silence detection, and the output signal of the silence detection result according to the fourth
embodiment of the present invention. In FIG. 9, the time axis shows the passage of time from left
to right, Th3 indicates a predetermined threshold, the reproduction sound level indicates the
level in the reproduction unit 81, and the silence detection 1 indicates a silence state output from
the silence detection unit 83. It is a signal of the detection result, and outputs H when it detects a
silent state where the reproduced sound level is smaller than the threshold Th3. In the fourth
embodiment of the present invention, determination of a silent interval in which a silent state
continues for a predetermined time or longer is described as the control unit 82 using the signal
of silence detection 1 to make a determination.
[0036]
Next, an operation at the time of resuming reproduction will be described. FIG. 10 shows a flow
at the time of resuming sound reproduction of the sound reproduction device according to the
fourth embodiment of the present invention. In FIG. 10, when the ambient sound level is equal to
or higher than the threshold Th1 and the reproduction is stopped, when the level of the ambient
sound is equal to or lower than the threshold Th2 (S101), the output from the silence detection
unit 83 is If it is L and it is not a silent section (S102), the playback position is returned forward
by trew from the position at which the playback was stopped (S103), and playback is resumed
(S104). If the output from the silence detection unit 73 is H indicating silence and is a silent
section when the playback is stopped (S102), the playback is resumed from the position at which
the playback was stopped (S104).
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[0037]
The relationship between the ambient sound level, the threshold value Th1, the threshold value
Th2, and the reproduction control according to the fourth embodiment of the present invention
is the same as that of FIG. 7 described in the third embodiment unless it is a silent section when
the reproduction is paused. If it is a silent section when the reproduction is temporarily stopped,
it is the same as FIG. 4 described in the second embodiment.
[0038]
According to the audio reproduction device of the fourth embodiment of the present invention,
when the level of the ambient sound is equal to or higher than the predetermined first threshold,
the reproduction is temporarily stopped and the ambient sound is equal to or lower than the
predetermined second threshold. Then, when playback is paused, playback is resumed at the
stopped position if the playback sound is a silent section, and if it is not a silent section, playback
is resumed after returning the playback position for a predetermined time. Even if the
surrounding sound is loud and playback is stopped, even if it is in the middle of a sentence or
pronunciation, it is easy to hear the audio data being played back during playback without
stopping listening to the audio data during playback. It is possible to provide an audio
reproduction device that does not reproduce useless silent sections.
[0039]
In addition, as a method of detecting a silent interval described in the fourth embodiment of the
present invention, several methods have conventionally been proposed. In the present invention,
although the method described above is used, detection of a silent segment is described. The
method may use other methods.
[0040]
Fifth Embodiment A fifth embodiment will now be described.
In the fifth embodiment of the present invention, after the determination is made on surrounding
sound and reproduction is paused, the apparatus resumes the reproduction after returning the
reproduction position to the position of the silent section immediately before the pause position.
explain.
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15
[0041]
The block diagram of the fifth embodiment of the present invention is the same as that of FIG. 8
of the fourth embodiment, so it will be described using FIG.
The reproduction unit 81 reproduces the audio data stored in the storage unit 11.
The first determination unit 14 outputs a determination result from the first determination unit
14 based on the comparison result of the signal level of the surrounding sound collected from
the microphone 13 during reproduction and the predetermined threshold value Th1. If it is
above, the PLAY signal is set to L for the playback unit 81 to stop playback. As described in FIG.
9, the silence detection unit 83 outputs H at silence detection 1 indicating silence, in a section
where the reproduction sound level of the audio data being reproduced by the reproduction unit
81 is less than or equal to the threshold Th3. Similarly to the silence detection 1, the silence
detection 2 is a signal of silence detection result output from the silence detection unit 83, and is
a silence state in which the reproduction sound level is smaller than the threshold Th3 and which
is predetermined for a predetermined time t1. If it is above, H is output. In the present
embodiment, the control unit 82 uses the silence detection 2 to store the address of the voice
data of the storage unit 11 corresponding to the end of the reproduction position of the silent
section when the silent state lasts t1 or more. The address of the stored voice data is the position
at the end of the immediately preceding silent section, and is the position at which the voice data
is resumed next.
[0042]
Next, control for resuming reproduction will be described when the surrounding audio level
output from the microphone 13 falls below a predetermined threshold Th2. Based on the
comparison result from the second determination unit 31, when the control unit 82 determines
that the level of the surrounding sound has become equal to or lower than the threshold Th2, the
control unit 82 returns the reproduction position of the audio data to the reproduction position
stored at the time of stopping To start. By this, the reproduction is resumed in the silent section
immediately before the position at which the reproduction is stopped. Further, as a method of
returning the position of the silent section immediately before storing the playback position, the
method of controlling the playback portion 81 by using the REW signal by the control portion 82
in FIG. 8 also returns the position of the corresponding address. The control unit 112 may
control to transfer audio data data to the reproduction unit 111 from the address to the storage
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unit 11 without using the REW signal as shown in the block diagram of FIG. FIG. 11 is a diagram
in which the REW signal is deleted from FIG.
[0043]
The relationship between the level of the ambient sound, the threshold value Th1, the threshold
value Th2 and the reproduction control according to the fifth embodiment of the present
invention corresponds to the reproduction unit 81 controlled by the control unit 82 using the
REW signal in the block diagram of FIG. When the method of returning to the address position is
used, it is the same as FIG. 7 described in the third embodiment. The time trew is set to a time
taken to return to the address position of the storage unit 11 associated with the position of the
silent section stored immediately before the control unit 82. The method using the block diagram
of FIG. 11 is the same as FIG. 4 described in the second embodiment.
[0044]
According to the audio reproduction device of the fifth embodiment of the present invention,
when the level of the ambient sound is equal to or higher than the predetermined first threshold,
the reproduction is paused and the ambient sound is equal to or lower than the predetermined
second threshold. When this happens, playback is paused and playback resumes from the
position of the silent section immediately before the position, so that the surrounding sound is
loud and the voice data being played back, even if it is in the middle of a sentence or
pronunciation when playback is stopped. It is possible to provide an easy-to-hear voice
reproducing apparatus, since the user can play back from a silent section which is a break of the
previous reproduction sound when the reproduction is resumed.
[0045]
Heretofore, several methods have been proposed in the prior art for detecting the silence
detection section, storing the silent section position, and moving the reproduction position to the
stored position, which has been described in the fifth embodiment of the present invention. You
may use methods other than the above.
Further, depending on the data format of the audio data, when the audio data has a code for
identifying the presence and absence as a unit of audio data, the identification code may be used
to detect the silence.
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[0046]
Sixth Embodiment A sixth embodiment will now be described. In the sixth embodiment of the
present invention, after judgment is made on surrounding sound and reproduction is paused,
reproduction is resumed after returning the reproduction position to a predetermined mark
position immediately before the position at which the reproduction was paused. The apparatus
will be described.
[0047]
FIG. 12 shows a block diagram of an audio reproduction apparatus according to a sixth
embodiment of the present invention. In FIG. 12, a storage unit 121 for storing voice data, which
is a teaching material for foreign language listening learning, a microphone 13 for collecting
surrounding sound, a predetermined threshold Th1 and the level of surrounding sound from the
microphone 13 , And a comparison between the predetermined threshold value Th2 and the level
of the surrounding sound from the microphone 13 for resuming the reproduction. Based on the
control of the control unit 122, the second determination unit 31 outputting the result, the
control unit 122 controlling the reproduction of audio data, and the audio data stored in the
storage unit 121 mark the start and the reproduction position of the reproduction , And a
headphone 16 for converting an output signal from the reproduction unit into sound and
outputting the sound.
[0048]
The voice data as the teaching material for foreign language listening learning stored in the
storage unit 121 is composed of additional data including control data in addition to the voice
information data. If the additional data is data for listening learning, it stores the mark associated
with the mark and the mark set by the user at an arbitrary position such as the beginning of the
sentence, and additional information of other marks.
[0049]
According to the relationship between the level of ambient sound, threshold value Th1, threshold
value Th2 and playback control in the sixth embodiment of the present invention, playback is
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paused if the level of ambient sound is above threshold Th1 and playback is stopped if the level
is below threshold Th2. Control is performed to resume the reproduction after returning the
reproduction position to the mark position immediately before the above position, and is the
same as FIG. 4 described in the second embodiment.
[0050]
Next, an operation at the time of resuming reproduction will be described.
FIG. 13 shows a flow at the time of resuming sound reproduction of the sound reproduction
device according to the sixth embodiment of the present invention. In FIG. 13, in the state where
the ambient sound level is above the threshold Th1 and playback is stopped, when the level of
the ambient sound is below the threshold Th2 (S131), the mark immediately before the playback
start position is stopped. The position is returned (S132), and the reproduction is resumed
(S133).
[0051]
According to the audio reproduction device of the sixth embodiment of the present invention,
when the level of the ambient sound is equal to or higher than the predetermined first threshold,
the reproduction is paused, and the ambient sound is equal to or lower than the predetermined
second threshold. Then, by resuming playback from the position of the mark immediately before
the playback was paused, the surrounding sound is loud and even if it is in the middle of a
sentence or pronunciation when the playback is stopped, the audio data being played back is
suspended It is possible to provide an audio playback apparatus that is easy to hear, because it is
played back from the mark position set in the head of the previous sentence etc. at the time of
resumption of playback without skipping it.
[0052]
Several methods have conventionally been proposed for storing marks and managing their
management and moving the playback position to the position associated with the marks, and
methods other than those described in Embodiment 6 of the present invention are used. You may
[0053]
Furthermore, the storage unit for storing voice data, which is a teaching material for foreign
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language listening learning, may be a recording medium such as an external memory such as a
removable memory card, a built-in memory, or a CD.
[0054]
Seventh Embodiment A seventh embodiment will now be described.
In the audio reproduction devices according to the first to sixth embodiments of the present
invention, the microphone for sound collection has been described as a dedicated device, but in
the seventh embodiment of the present invention, for example, this function is applied to
portable terminal devices such as mobile phones. Therefore, it is possible to incorporate the
microphone into the mobile phone, and the microphone will be described as a device that
doubles as the microphone of the mobile phone used in the conventional mobile phone.
FIG. 14 shows a block diagram of a mobile phone incorporating a microphone.
In FIG. 14, the mobile phone 1401 receives the reception data via the antenna 1402,
demodulates it by the wireless unit 1403, transfers the data to the control unit 1404, converts it
into voice by the voice processing unit 1407, and converts it into a speaker Perform audio output
from 1408. In the transmission, the voice input from the microphone 1410 is converted into
voice data by the voice processing unit 1407, the data is transferred to the control unit 1404,
modulated by the wireless unit 1403, and transmitted from the antenna 1402. The memory
1405 stores a program for operating the mobile phone 1401. The external memory 1406 also
stores other data of the user. Audio data for audio reproduction may be stored in either the
memory 1405 or the external memory 1406.
[0055]
According to the mobile phone of the seventh embodiment of the present invention, when the
ambient sound level is equal to or higher than the predetermined first threshold, the
reproduction is temporarily stopped and the ambient sound is not equal to or lower than the
predetermined second threshold. If the surrounding sound is loud and playback is stopped by
resuming playback by returning the playback position forward to a predetermined time or a
silent section immediately before or a mark immediately before, it is assumed that it is in the
middle of a sentence or pronunciation Also, it is possible to provide a mobile phone having a
voice reproduction function that does not miss the sound data being reproduced on the way and
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is easy to hear when resuming reproduction.
[0056]
According to the audio reproduction device of the present invention, even if a loud sound is
generated in the periphery during reproduction of audio data such as foreign language listening
learning, the microphone collects the ambient sound and has a predetermined first threshold or
more. If there is, playback is paused, and if it falls below a predetermined first or second
threshold, playback is performed from the position at which playback was slightly returned or
the position of the silent section immediately before or the position of the mark set at the last
sentence etc. By resuming, reproduction can be performed without missing the audio data, so
that it is useful as an audio reproduction device for listening learning, particularly as a portable
audio reproduction device.
[0057]
Block diagram of audio reproduction device according to the first embodiment of the present
invention Relationship between ambient sound level and threshold value Th1 according to the
first embodiment of the present invention and reproduction control block diagram of the audio
reproduction device according to the second embodiment of the present invention Relationship
between ambient sound level and thresholds Th1 and Th2 and playback control according to
Embodiment 2 of the invention Relationship between ambient sound level and threshold Th1 and
playback control according to the second embodiment of the present invention Embodiment 3 of
the present invention Block diagram of the audio reproduction apparatus of the third
embodiment of the present invention, the relationship between the level of the ambient sound
and the threshold values Th1 and Th2 and the reproduction control, and the block diagram of
the audio reproduction apparatus of the fourth embodiment of the present invention. 4
Relationship between level of reproduced voice, threshold value Th3 and silence detection signal
Flow chart for resuming voice reproduction of voice reproduction apparatus according to the
fourth embodiment of the present invention Block of voice reproduction apparatus according to
the fifth embodiment Fig. The embodiment of the present invention Block diagram of a mobile
phone including a sound reproducing apparatus of the seventh embodiment of a flow diagram
the present invention at the time of resuming the audio reproduction of the audio reproducing
apparatus of the sixth embodiment of a block diagram the present invention audio playback
device
Explanation of sign
[0058]
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11, 121 storage unit 12, 61, 81, 111 reproduction unit 13 microphone 14 first determination
unit 15, 32, 62, 82, 112, 122 control unit 16 headphones 31 second determination unit 83 silent
detection unit 1401 mobile phone 1402 antenna 1403 wireless unit 1404 control unit 1405
memory 1406 external memory 1407 audio processing unit 1408 speaker 1409 headphone
1410 microphone
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