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JP2009260458

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DESCRIPTION JP2009260458
[PROBLEMS] To play back multi-channel audio from an external speaker as a home theater, and
at the same time, to output from an internal speaker in a TV an audio signal from which only a
specific component has been extracted, audio that should be located in the front center The
present invention provides an audio reproduction apparatus capable of enhancing the sound field
effect such as reproducing with a sense of unity with the screen or adding a sense of expansion
in the forward direction, and an audiovisual system including the same. An audio signal is
separated from an HDMI transmission signal input to an HDMI receiving unit 101, and an audio
signal from which only a specific component is extracted by an audio processing unit 104 is
separated by an HDMI receiving unit 101 The audio signal is synthesized by the unit 102 and
transmitted from the HDMI transmission unit 103, and an audio signal in which only the specific
component is extracted is output from the built-in speaker of the connected TV 200. [Selected
figure] Figure 1
Audio reproduction apparatus, and audiovisual system including the same
[0001]
The present invention relates to an audio reproduction apparatus having a function of receiving a
video signal and an audio signal according to the HDMI standard and transmitting the signal to a
video and audio reproduction apparatus and outputting an audio signal, and an audiovisual
system including the same. It is.
[0002]
Conventionally, a video and audio signal viewing apparatus combining a video and audio signal
generating apparatus such as a DVD player and a DVD recorder, an audio reproduction apparatus
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such as an AV amplifier, and a video and audio reproduction apparatus such as a television
receiver (hereinafter referred to as "TV") A system is provided.
[0003]
2. Description of the Related Art In recent years, various video and audio viewing systems
generally called home theater systems have been proposed and widespread, which realize a
sense of reality like a movie theater at home.
The user can easily enjoy multi-channel audio output from an external speaker connected to the
sound reproduction device of the home theater system.
[0004]
In particular, recently, there has been an increase in the number of systems of rack-type home
theaters on which a TV stand incorporating a plurality of speakers and a TV can be mounted, and
it has become possible to enjoy home theater more easily.
Many of these devices can transmit and receive transmission signals of the High Definition
Multimedia Interface (HDMI) standard, they can be easily connected with a single cable of the
HDMI standard, and reproduction with high image quality and high sound quality is possible by
digital transmission. It is possible. JP 2007-88774 JP JP 2004-104715 JP JP 2004-7389 JP
[0005]
In such conventional sound reproduction devices and audiovisual systems, almost all cases where
voices such as movie lines and music vocals, which should be positioned at the front left and
right center, are output from a dedicated center speaker It is. The center speaker is often placed
above or below the display, and in particular, in a rack-type home theater, the center speaker is
placed below the screen together with the left and right speakers.
[0006]
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When the center speakers are arranged above and below the display in this manner, the
positional relationship between the image displayed on the display and the audio output from the
center speaker does not match, and the speech of the movie or the vocal sound of the music is
displayed on the screen. I heard it from the outside, and I felt very uncomfortable (for example,
the rack-type home theater shown in FIG. 2).
[0007]
There is also an audiovisual system that uses a speaker built in the TV as a center speaker to
eliminate the need for the installation of an additional center speaker and solve the above
problems (Patent Documents 1 to 3), but the rack type When the front left and right speakers are
also positioned below the display as in a home theater, there is a disadvantage that the
connection of sounds in the front left and right directions is deteriorated (for example, the rack
type home theater shown in FIG. 5).
[0008]
The present invention solves such conventional problems and reproduces multi-channel audio
from an external speaker as a home theater, and at the same time, outputs an audio signal from
which only a specific component is extracted from a speaker built in the TV A sound
reproduction device capable of enhancing the sound field effect by reproducing the sound that
should be located at the center of the front left and right with a sense of unity with the screen or
adding a sense of expansion in the front direction; It is an object of the present invention to
provide an audiovisual system including the above.
[0009]
The audio reproduction apparatus according to the present invention includes an input unit and
an output unit for video and audio signals according to the HDMI standard, and the output unit is
connected to the audio and video reproduction apparatus, and the audio signal from the input
unit is processed externally An audio reproduction apparatus configured to output to a speaker,
and an audiovisual system including the audio multiplex apparatus, wherein video and audio
signals are multiplexed from an audio and video signal source capable of transmitting video and
audio signals according to the HDMI standard. And an HDMI signal receiving unit for receiving
the transmission signal data according to the corresponding HDMI standard and separately
separating and outputting the video signal data and the audio signal data, and performing
predetermined processing on the audio signal for output from the external speaker An audio
processing unit separately performing predetermined processing to obtain a specific effect and
outputting the video signal data received by the HDMI signal receiving unit; An HDMI signal
synthesis unit that synthesizes the signal data, an HDMI signal output unit that transmits the
transmission signal data output from the HDMI signal synthesis unit to a video and audio
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reproduction apparatus having a video display unit and a built-in speaker, and the HDMI signal
reception Unit, an HDMI signal synthesis unit, an HDMI signal transmission unit, and a control
unit for controlling an audio processing unit, and the audio processing unit is further processed
when the audio signal processed by the audio processing unit is output from an external speaker
, And the combined signal is output as an HDMI signal from the HDMI signal transmission unit in
order to output an audio signal in which only a specific component is extracted from the built-in
speaker of the video and audio reproduction apparatus to be connected.
[0010]
According to the present invention, the center speakers are disposed above and below the
display, the positional relationship between the video displayed on the display and the audio
output from the center speaker does not match, and the vocal speech of the movie lines and
music is displayed on the screen. Even when there is a sense of incongruity, even if there is a
sense of incongruity, by outputting an audio signal from which only a specific component has
been extracted from the built-in speaker in the TV, the audio that should be located in the front
center It has the effect of being able to enhance the sound field effect such as reproducing with a
sense of unity or adding a sense of expansion in the forward direction.
[0011]
The specific component is, for example, as follows.
(1) A voice signal of a specific band among voice signals outputted from an external speaker A
part of frequency bands of the voice of a center channel, for example, only a voice band extracted
(2) Voice outputted from an external speaker An audio signal that constitutes a sound effect
component in the signal For example, a signal in which only the high frequency component is
extracted from the sound of the surround channel
[0012]
An audio reproduction apparatus according to the present invention and a video / audio viewing
system including the audio reproduction apparatus include an input / output unit of video /
audio signals according to the HDMI standard, and processes an audio signal and outputs the
processed audio signal to an external speaker. And a video / audio viewing system including the
same, wherein the transmission signal data according to the HDMI standard in which the video
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signal and the audio signal are multiplexed from the video / audio signal source capable of
transmitting the video / audio signal according to the HDMI standard An HDMI signal receiver
that receives and separately outputs video signal data and audio signal data, and performs
predetermined processing on the audio signal for output from an external speaker, and
separately for obtaining a specific effect. And an audio processing unit that outputs the
processed audio signal, and an HDM that combines the audio signal data with the video signal
data received by the HDMI signal receiving unit. A signal synthesis unit; an HDMI signal output
unit for transmitting transmission signal data output from the HDMI signal synthesis unit to a
video and audio reproduction apparatus having a video display unit and a built-in speaker; the
HDMI signal reception unit and the HDMI signal synthesis unit And an HDMI signal transmission
unit, and a control unit for controlling an audio processing unit, and the audio processing unit is
further processed when the audio signal processed by the audio processing unit is being output
from an external speaker. In order to output the audio signal from which only the component is
extracted from the built-in speaker of the video and audio reproduction apparatus to be
connected, it is synthesized and output as an HDMI signal. (1) A specific one of the audio signals
output from the external speaker When the audio signal of the band is output from the built-in
speaker of the video and audio playback device The center speakers are arranged above and
below the display, and Even if the positional relationship between the video projected on Ray and
the audio output from the center speaker does not match, and the speech of the movie or the
vocal audio of the music can be heard from the outside of the screen, even if there is a sense of
incompatibility, By outputting an audio signal from which only a specific component has been
extracted from a speaker built in the TV, it is possible to reproduce an audio that should be
located at the center in the front left and right with a more integrated sense with the screen.
(2) When an audio signal that constitutes a sound effect component among audio signals output
from an external speaker is output from the built-in speaker of the video and audio reproduction
apparatus: When reproducing content mainly composed of music, forward direction The sound
field effect can be enhanced by adding a sense of expansion.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out
the audio reproduction apparatus of the present invention and the video / audio viewing system
including the same will be described in detail with reference to FIGS. 1 to 5.
[0014]
First Embodiment FIG. 1 shows a configuration of a video and audio viewing system including an
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audio reproduction apparatus.
The video and audio viewing system includes an AV amplifier 100 and a TV 200.
The AV amplifier 100 is an example of a sound reproduction device, and the TV 200 is an
example of a video and audio reproduction device.
[0015]
The AV amplifier 100 includes an audio processing unit 104, an audio amplification unit 105,
and a control unit 106.
In addition, a DVD recorder 500 which is an external device is connected to the terminal 111.
[0016]
An HDMI transmission signal from the connected DVD recorder 500 video / audio signal
generation device is input to the HDMI reception unit 101, and the video signal and the video
signal after being separated into the audio signal and the video signal selection switch 113 are
selected. The signal is transmitted to the HDMI transmitting unit 103 through the HDMI signal
synthesizing unit 102 that synthesizes the audio signal.
[0017]
The audio signal (Sa1) from the HDMI receiving unit 101 and the audio signal (Sa2) after
predetermined processing of the signal are input to the audio signal switching switch 113, and
the control unit 106 selects It is possible.
[0018]
A multi-channel speaker 107 is connected to the AV amplifier 100 as an external speaker.
Here, the left and right channels (L, R), the center channel (C), and the deep bass channel (SW)
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are 3.1 channel systems, but the number of channels and the configuration are not specified.
For convenience of description, the multi-channel speaker 107 is also referred to as an external
speaker 107.
[0019]
The operation of the AV amplifier 100 (sound reproduction device) configured as described
above will be described.
[0020]
First, consider the case where the present invention is operated in order to play movie software
of a DVD disk with the DVD recorder 500 and make the speech more audible from the inside of
the screen.
At this time, it is assumed that the output audio format of the DVD recorder 500 is set to multichannel compressed data.
The HDMI transmission signal output from the DVD recorder 500 is input from the HDMI input
terminal 111 to the HDMI receiving unit 101 of the AV amplifier 100. The HDMI receiving unit
101 decodes the input HDMI transmission signal, separates the signal into video signal data and
audio signal data, and outputs the data. The separated video signal is input to the HDMI signal
synthesis unit 102 as it is. On the other hand, the separated audio signal (Sa1) is input to the
audio processing unit 104. The audio processing unit 104 decodes multi-channel compressed
audio data, and then the audio signal is input to the audio amplification unit 105 as an audio
signal of each output channel and output from the external speaker 107. At the same time, the
audio processing unit 105 extracts a signal (Sa2) of the audio band passing through a band pass
filter centered at about 8 kHz among the audio signals of the center channel, and enters the
audio signal switch 113 as 2-channel audio. Here, the reason for using a band component around
8 kHz is that the sound component of this band is considered to be characterized as being easily
localized upward. The audio signal switch 113 is controlled by the control unit 106 to be on the
Sa2 side when the effect is selected to be effective. The video signal output from the HDMI
reception and the audio signal (Sa2) from the audio signal switch 113 are combined into an
HDMI transmission signal by the HDMI signal synthesis unit 102, and the HDMI transmission
signal is output from the HDMI transmission unit 103.
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[0021]
An HDMI transmission signal is input from the HDMI input terminal 211 of the TV 200 to the
HDMI receiving unit 201 through the HDMI cable connected to the HDMI output terminal 112 of
the AV amplifier 100. In the HDMI receiving unit 201, the input HDMI transmission signal is
separated into a video signal and an audio signal, and the video signal is appropriately processed
by the video signal processing unit 208 and displayed on the display 209. The audio signal is
converted into a two-channel audio signal by the audio processing unit 204, amplified by the
audio amplification unit 205, and then output from the built-in speaker 207.
[0022]
Here, the effects of the present embodiment will be described with reference to FIGS. FIG. 2
shows the case where the AV amplifier 100 and its external speaker 107 are configured as a rack
type home theater, and illustrates a sound image when the effect of the present invention is
turned off. All sound images are localized at the bottom of the screen, including voices that
should be located in the center of the front left and right, such as words.
[0023]
Although FIG. 3 shows the case where the effect of the present invention is turned on, the sound
output from the built-in speaker 207 of the TV 200 is one of the sound signals output from the
center channel speaker of the external speaker 107 of the AV amplifier 100. Since the
component of the band that is easy to feel as if localized to the upper part is extracted, the audio
signal from the center channel speaker of the external speaker 107 of the AV amplifier 100 is
simultaneously output, as shown in FIG. Since the audio signal of the original center channel is
output from the center speaker of the external speaker 107 of the AV amplifier 100, it should be
positioned at the center of the front left and right without significantly damaging the connection
of sounds in the left and right direction. The sound image is more localized in the screen.
[0024]
As described above, according to the present embodiment, by using the built-in speaker 207 of
the HDMI-connected TV, the center speaker is disposed under the display 209, and the image
displayed on the display 209 and the image output from the center speaker are output. The
positional relationship of the audio is not matched, and the speech of the movie and the vocal
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voice of the music will be heard from the outside of the screen, and even if there is a sense of
incongruity, the audio should be positioned at the center in the front left and right It can be
played with a sense of unity.
[0025]
Note that the audio signal switching switch 113 in the configuration of the present embodiment
switches internally in the audio processing unit 104 whether to output the audio signal Sa1 input
to the audio processing unit 104 as it is or to process and output it. Can be omitted.
[0026]
In addition, although the limitation of the band is set to about 8 kHz here, if it is a voice band of
about 400 Hz to 4 kHz, only the voice is emphasized, and an effect suitable for viewing a news
program or the like can be obtained.
Furthermore, when the higher frequency band of 4 kHz or more is taken out, the spread of the
sound increases, which is effective for music reproduction.
[0027]
Second Embodiment Next, a second embodiment will be described based on the configuration of
a video and audio viewing system including the echo reproduction apparatus of FIG. 1 as well.
[0028]
In the present embodiment, the basic configuration, operation, and effects are the same as those
of the first embodiment, but the operation of volume change in the TV 200 is added when the
volume of the AV amplifier 100 is changed. Be done.
[0029]
The control unit 106 controls the audio processing unit 104 or the audio amplification unit 105
by the volume adjustment button or adjustment knob of the AV amplifier 100 or the remote
control operation (neither is shown), so that the audio output from the external speaker 107 can
be performed. Adjust the volume.
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At this time, the control unit 106 simultaneously transmits volume control data to the control
unit 206 of the TV 200 through the control line 300 of the HDMI transmission cable.
The control unit 206 of the TV 200 controls the sound processing unit 204 or the sound
amplification unit 205 based on the received volume control data to adjust the sound volume of
the sound output from the built-in speaker 207.
[0030]
Thus, when the volume of the audio output from the external speaker 107 of the AV amplifier
100 is adjusted, control data according to the volume is sent to the TV 200 to interlock the
volume of the audio output from the internal speaker of the TV 200 it can.
[0031]
The data for volume level control according to the second embodiment is preferably a signal
conforming to the CEC standard.
[0032]
Third Embodiment Next, a third embodiment will be described based on the configuration of a
video and audio viewing system including the echo reproduction apparatus of FIG. 1 as well.
[0033]
In the present embodiment, the basic configuration, operation, and effects are the same as in the
first embodiment, but the operation of changing the volume at the AV amplifier 100 is added
when the volume of the TV 200 is changed. Be done.
[0034]
The control unit 206 controls the audio processing unit 204 or the audio amplification unit 205
by the volume adjustment button, adjustment knob, or remote control (not shown) of the TV 200
to control the volume of the audio output from the built-in speaker 207. adjust.
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At this time, at the same time, the control unit 206 transmits volume control data to the control
unit 106 of the AV amplifier 100 through the control line 300 of the HDMI transmission cable.
The control unit 106 of the AV amplifier 100 controls the sound processing unit 104 or the
sound amplification unit 105 based on the received data for volume control to adjust the volume
of the sound output from the external speaker 107.
[0035]
As described above, when the volume of the audio output from the built-in speaker 207 of the TV
200 is adjusted, control data according to the volume is sent to the AV amplifier 100 to interlock
the volume of the audio output from the external speaker of the AV amplifier 100. be able to.
[0036]
The volume level control data of the third embodiment is preferably a signal conforming to the
CEC standard.
[0037]
Fourth Embodiment Next, a fourth embodiment will be described based on the configuration of a
video and audio viewing system including the echo reproduction apparatus of FIG. 1 as well.
[0038]
In the present embodiment, the basic configuration, operation, and effects are the same as in the
first embodiment.
[0039]
First, consider a case where the movie software of a DVD disk is reproduced by the DVD recorder
500, its sound effects are emphasized, and the present invention is functioned to add the spread
of the sound field in front.
At this time, it is assumed that the output audio format of the DVD recorder 500 is set to multichannel compressed data.
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The HDMI transmission signal output from the DVD recorder 500 is input from the HDMI input
terminal 111 to the HDMI receiving unit 101 of the AV amplifier 100.
The HDMI receiving unit 101 decodes the input HDMI transmission signal, separates the signal
into video signal data and audio signal data, and outputs the data.
The separated video signal is input to the HDMI signal synthesis unit 102 as it is.
On the other hand, the separated audio signal (Sa1) is input to the audio processing unit 104.
The audio processing unit 104 decodes multi-channel compressed audio data, and then the audio
signal is input to the audio amplification unit 105 as an audio signal of each output channel and
output from the external speaker 107.
At the same time, the audio processing unit 104 extracts a high frequency component (Sa2) of
about 4 kHz or more among the audio signals of the surround channel, and enters the audio
signal switch 113 as 2-channel audio.
The audio signal switch 113 is controlled by the control unit 106 to be on the Sa2 side when the
effect is selected to be effective. The video signal output from the HDMI reception and the audio
signal (Sa2) from the audio signal switch 113 are combined into an HDMI transmission signal by
the HDMI signal synthesis unit 102, and the HDMI transmission signal is output from the HDMI
transmission unit 103.
[0040]
An HDMI transmission signal is input from the HDMI input terminal 211 of the TV 200 to the
HDMI receiving unit 201 through the HDMI cable connected to the HDMI output terminal 112 of
the AV amplifier 100. In the HDMI receiving unit 201, the input HDMI transmission signal is
separated into a video signal and an audio signal, and the video signal is appropriately processed
by the video signal processing unit 208 and displayed on a display. The audio signal is converted
into a two-channel audio signal by the audio processing unit 204, amplified by the audio
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amplification unit 205, and then output from the built-in speaker 207.
[0041]
Here, the effects of this embodiment will be described with reference to FIG. FIG. 2 shows the
case where the AV amplifier 100 and its external speaker 107 are configured as a rack type
home theater, and illustrates a sound image when the effect of the present invention is turned
off. Although the sound field of the surround channel is not shown, even if a speaker is disposed
only at the front in a general rack type home theater, the sound effect component is located at
the rear of the viewing position by virtual reproduction technology using head transfer function.
Sounds localized as it surrounds.
[0042]
FIG. 4 shows the case where the effect of the present invention is turned on, in which a front
sound field image is shown. The sound output from the built-in speaker 207 of the TV 200 is a
virtual reproduction from the external speaker 107 of the AV amplifier 100 because the high
frequency component of about 4 kHz or more is extracted from the surround channel signal of
the AV amplifier 100. By being output simultaneously with the sound signal of the surround
channel, as shown in FIG. 4, the surround sound field appears as a sense of depth also in the
front, and the sound image is in the upper part in correlation with the virtual sound source
localized in the rear. You can get a sense of the expansion of the surround sound field in the
vertical direction as well as in the front, rear, left and right.
[0043]
As described above, according to the present embodiment, by using the built-in speaker of the TV
connected via HDMI, it is possible to emphasize the sense of expansion of the sound field and
obtain an effect of enhancing the sense of reality.
[0044]
In the present invention, center speakers are disposed at the upper and lower sides of the
display, the positional relationship between the image displayed on the display and the audio
output from the center speaker does not match, and the speech of a movie or the vocal sound of
music is from outside the display Even if there is a sense of incongruity, even if there is a sense
of incongruity, the sound signal that extracts only a specific component is output from the built-
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in speaker in the TV, so that the sound that should be located at the center in front right and left
is more integrated with the screen It has the effect that the sound field effect can be enhanced,
for example, by playing it back or adding a sense of expansion in the forward direction, and can
be widely used as a home theater system used at home.
[0045]
The block diagram of the audio-video audio-visual system in Embodiment 1-4 of this invention
The effect of the audio-video audio-visual system at the time of OFF of the audio-video audiovisual system in this embodiment The effect of the audio-video audio-visual system in this
embodiment Sound image figure at the time of ON Sound image figure at the time of effect of the
video and audio viewing system according to the fourth embodiment of the present invention
Sound image figure in a conventional example using a speaker built in TV as a center speaker
Explanation of sign
[0046]
100 AV amplifier 101 HDMI signal receiving unit 102 HDMI signal combining unit 103 HDMI
signal transmitting unit 104 audio processing unit 105 audio amplification unit 106 control unit
107 external (multi-channel) speaker 111 HDMI signal input terminal 112 HDMI signal output
terminal 200 television reception (TV) 201 HDMI signal reception unit 204 audio processing
unit 205 audio amplification unit 206 control unit 207 built-in speaker 208 video processing
unit 209 display 211 HDMI signal input terminal 300 control signal 500 DVD recorder 501 DVD
recorder control unit
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