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JPS51121001

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DESCRIPTION JPS51121001
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view for explaining an actual sound
field, FIG. 2 is a block circuit diagram showing a basic configuration of the present invention, and
FIG. 3 is a delay element in FIG. FIG. 4 is a block circuit diagram showing one embodiment of the
present invention, and FIG. 5 and FIG. 6 are block circuit diagrams showing an application
example. is there. DLI, DL2, DL3... Delay elements. Fig. 1 Fig. 2-1-551-1001001 (2) Fig. 4-2-51100101 (3) Fig. 5-Fig. 6 = -3 =
[Detailed description of the invention] This invention is a multi-channel sound III reproduction
apparatus, by artificially adding reverberation, in the live sound field, while live = = live
performance in the concert hall and uniform ! ! In order to gain a sense of illusion, illusion is
designed to change the reverberation amount and add a special effect to the reproduced sound
collection. Conventionally, as this type of device, for example, devices using signal delay elements
such as springs, pipelines, packet pre-gates, so-called BBDs, etc. are simply delayed, or
conversely, using the * i system. Some of the above attempts to obtain the above-mentioned
reverberation effect, but the former is insufficient in its effect, and the latter is a large-sized
paper, and its production cost is less than the stomach, to be incorporated into a home stereo
device It was not appropriate. The present invention is intended to solve such a drawback, and to
provide a device which can be easily linked to commercially available sound reproducing devices
with a relatively simple configuration and can fully exhibit the above effect. . As shown in the
figure below, one example of the present invention is shown by i + 52 as shown in the following
figures, a single sound source 1 on the stage is generated in a closed actual sound space (2) such
as a concert hall etc. In the case of making a sound, the direct sound and the nine different
reverberations with different delay times will be delayed by the time to be folded in the reflection
of the sound wave. Here, the reflected sound that reaches the listener 2's ear first is called fang 1
reflected sound, but the ton 1 reflected sound is also further reflected, and it becomes an arm 2
reflected sound and the opposite of the reflected sound of the arm 1 There is also one that
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reaches the listener's ear from the direction 0. Also, it is considered that the higher order
reflected sound reaches the listener's ear while changing the arrival direction to various angles
and then attenuating to the next missing side. Be Therefore, when adding reverberation, what
remains as close as possible to such an actual sound field? It is thought that effective
reverberation can be obtained by synthesizing the # formation number. In the case of
synthesizing reverberation, there is a need to consider the direction of arrival. Fig. 2 shows the
basic configuration of this invention, and DIR and DIL are signal delay elements such as pipelines,
springs, packet bridge 7 registers, attenuators interlocking with mute R and TT-13 + LFi, No. I
company addition amplification number that changes the amount of coupled transmission
between the fI delay elements DIR and DInL has I & ability to add and amplify several signals in
addition amplification number 0 Even simple adders that do not have a 杜 amplification function
can be used.
And since the one shown in this figure is a book used in common in the 2-channel stereo
reproduction apparatus, the right signal and the left signal are respectively added as input 0, ie,
the signal added to the R input is delayed by the delay element DIR. After being delayed, it is
mixed with the R source signal at an appropriate ratio, and when it reaches R output, it is
attenuated through the attenuator TT @ L and then mixed with the L input and delayed by the * a
element DEL. , And mixed with the L original signal to become a part of the L output. Similarly,
for the L input, the R @ and L signals are mixed while being attenuated within the delay loop
constituted by the delay elements DIR and DEL, and taken out in a mixed state to the R output
and L output respectively. Become. Ie, various slow aF1? Between f and (4! A reverberant signal
with directionality will be added to the R and L signals 0 where the Rfi and L signals are mixed
and Lt, which may affect the sound image localization of the playback sound field Although the
question arises, this liJ4m has been experimented from the past, and when two sound sources
with the same output level and placed separately have a time lag and are made to sound
instantly, It has been found that the soother is localized to the person who made the sound. By
the way, the mixed signal in this invention is all sounded with a delay in time of the original
signal and the sound signal localization according to the above fact. Is not considered to affect
the First, in order to obtain the same effect on each of the R signal and the L signal, the delay
elements DIR and DEI must have the same characteristics. Missing 3 figures show the continuous
burning elements DIR and DI! ! The basic h part structure of L is shown, and DLI, DL2 and DL3
are unit delay elements respectively, and an input 11111i1 loop is set from each connection
point, +51 by the return loop, and by near distance reflection I am making a reverberation sound.
In this case, the delay element DL1. DL2. Different delay times set in DL3 give more natural
echo patterns ◎ That is, when the delay time of each burning element is equal b, an unpleasant
7-lattice sound is generated, which is preferable. Absent. In addition, in yellow 2 the connection
point 3 in FIG. 3 is used as an output, and it is configured to be added to the other input, but this
is optional, and connection collapse 1 or 2 ie many unit delay elements are connected When it is
connected, the connection point n is used as the output, and the other input is also good, or a
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combination of these is also possible 0 Of course in this case, the subjective sense of the sound
field reproduced by the company will differ .
4 is a book showing a concrete embodiment of the present invention, so this embodiment uses a
packet pre-charge resistance 7 resistor as a unit delay element and is configured for a two
channel system, and an application is applied. In the case of 0, ie,-which is capable of freeing the
amount of delay time according to the frequency (6), the step 11F is an input filter, and in the
delay elements DL1 and DI12, warsome intermodulation and distortion are caused. The purpose
is to pass only the frequency band that can be transmitted by the delay elements DLI and DL2 in
order to prevent the occurrence. Since the lid r is an intermediate filter and the clock frequency
used for DL1 and DL2 is different, the delay element DLI is used to remove the noise component
superimposed on the signal so that the delay element DL2 does not generate a beat between the
p clock. 6AM is an amplifier for amplifying the signal level attenuated by the delay elements DLI
and DL2 to a sufficient level, and removing clock signals mixed in with the signals in the oO · ν
delay elements DLI and DL2 And at the same time intermodulation φ. QVCO, l, which is a book
for removing noise. 0 鷺 Q, which is a VOO2Fi voltage control clock oscillation number and
supplies two-phase clock signals to delay elements IILI, DL2 and DL3 respectively, corrects the
change in the frequency characteristics generated in delay elements DLI and D12 with equalizer
71 That's for you! The te is a fixed attenuator, 1 〒〒 2. ム〒テ3. The TT4 is a cute attenuator,
and the PI + one number is interlocked with it so that the amount of attenuation can be changed
to t 0. Furthermore, in this 11 applications-I, in the basic configuration diagram shown in Fig. 3
The iM series l # 3 is used as the input and the connection point 2 is used as the output, and the
feedback from the soft I # 1 is removed. Also, in this embodiment, the unit delay element DLI,
DL2. DL3 Kl jl-A packet brigade register with transfer stages is used, so if using the same clock
frequency for all these elements, each signal * i signal will be the same, causing unpleasant fluff
sounds ◎ this rounding, oscillation Using two clock signal generating cans whose frequency can
be arbitrarily set by the applied voltage, the signal observation time in the continuous burning
element DL2 is configured to be the same as that of the delay elements DL1 and DL3. This
drawback can also be eliminated by applying a clock frequency modulation signal of about 3 to
101 g to the transmitter vcol and Va02, and further, the variation lI!
It can also be used to create special sound fields by changing the signal level, waveform and
frequency. Further, the absence 51 and o 6 show an embodiment in the case where the present
invention is applied to a sound reproducing apparatus having two or more reproduction
channels, and the absence 5 is a connection for 3 channels, and o 6 It is understood from the
above description that the connection of four channels or more is shown for four channels and
that the construction of the present invention can be easily performed by K when the
configuration of the present invention is combined. Here, in the embodiment shown in FIG. 4, the
bandwidth that can be transmitted by delay elements DLI, DLR, and DL3 is limited to sxagi, and
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the range of clock frequencies that can be varied by VCO1 and 7002 for oscillation is set to
1OKHi to 30KH1. is there. Therefore, each unit late name element DL1. DL2. Since the
number of transfer stages of D19 + L3 at the time of observation is 512, the button can be
changed in the range of 28.85 m-.e to 8.6 m @ 5 eo. Since the output end of the signal delay
element is connected to the input side of the other channel according to the above and the
output end of this element is connected to the original signal circuit of each channel as described
above, The main sense of reverberation is not determined solely by its amplitude characteristics
and echo pattern, but its direction of arrival is also subject to attenuation and changes variously,
so that the actual sound different from that of the conventional one is You can get a feeling close
to the place. That is, there is an effect that the reverberation sound can have a function of
directionality 0
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