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JPS5091302

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DESCRIPTION JPS5091302
Specification 1, name of invention i multi-channel volume balance remote control system!
???? Claims, signals for remote adjustment in the playback device are sequentially added to
each channel system of the multichannel, amplified by the amplifier of each channel system, and
amplified to the speaker of each channel system in the predetermined arrangement relationship
7 after mourning. Use the microphone of the remote adjustment transmission unit at the desired
position where you want to hear the sound and listen to this speaker! The receiver unit of the
reproduction apparatus transmits the transmission signal according to the volume of its gate, and
the gain of the amplifier of each channel system is adjusted according to the reception signal of
the reception device of the reproduction device, and the listening Multi-channel volume balances
characterized in that the balances of the respective sounding volumes are automatically adjusted
(remotely adjusted according to the device. Detailed Description of the Invention The present
invention can automatically and automatically adjust the balance of the multi-channel audio
signal automatically and remotely The purpose is to provide a method. Conventionally, the
volume balance of the 4-channel speaker is adjusted manually by the sense of hearing. -For this
reason, the adjustment of the volume balance can not be accurately performed, and there is also
a drawback that it is 1 or 1 overwhelmed. 11l) The present invention eliminates one of the
above-mentioned drawbacks and will be described in detail with reference to the drawings,
together with the drawings. FIGS. 1 and 2 respectively show block diagrams of a transmitting
system and a receiving system of an embodiment of the multi channel ? channel voice volume
remote control system according to the present invention. Now, when the far-adjustment
transmission unit 37.0 power supply switch 6 shown in FIG. 1 is closed, the voltage from the
battery 5 is supplied to the modulator 4 '1 and the carrier signal is transmission anti. The signal
is sent to the antenna 7 and the radio wave t is transmitted by the ultrasonic wave from the
antenna 7 of Jin. As shown in FIG. 2, the radio wave and the beating sound of 1 inch are received
by the receiving antenna 8 of the remote receiver of the reproducing apparatus, amplified by the
high frequency amplifier 9, and relay 14.4. Drive 0 This drive of the relay 14 causes the
enhancement EndPage: 1 unit 111, the audio signal oscillator 15, and the switching pulse (the
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pulse generator 17 to operate). The switching pulse generated by the switching pulse generator
1) is divided by the frequency divider 1B and sent to the switching circuit 13.16, which is 1
channel equivalent) 1 to 3 seconds, 4 channels on 4 channels in 4 channels. The channels ? are
sequentially switched in a cycle. Therefore, for example, IKHz (D @ is a switching circuit l!) For
adjustment in which the audio signal oscillator 15 oscillates.
16 and sequentially supplied to the input terminals i9 to -22 of each channel for 1 to 3 seconds.
The adjustment signal of the first channel supplied to the input terminal 19 is sequentially
amplified by the preamplifier 23 and the main amplifier 27. It is sounded from the speaker 31.
Similarly, the signal for the third channel is amplified by the preamplifier 24 and the main
amplifier 28, amplified by the speaker 32, and the signal for # 11 l of the third channel supplied
to the input terminal 21 is the preamplifier 1 ZS, the main amplifier 1 The adjustment signal of
the fourth channel, which is sequentially amplified by the amplifier 29 and sounded from the
speaker 33 and supplied to the input terminal 22, is supplied to the preamplifier 26. The sound
is successively amplified by the main amplifier 3 and sounded from the speaker 34.
Loudspeakers 31 to 34] The sound signal produced is picked up by the non-directional
microphone 1 of the remote control transmission unit 37, and the IKHz voice signal is amplified
by the amplifier 2 and passes through the variable resistor 3. The modulation signal is sent to the
modulator .quadrature.4 to modulate the carrier signal. The modulated carrier signal is again
transmitted from the transmitting antenna 7 as radio waves or ultrasonic waves. This
transmission signal is a signal according to the volume from each of the speakers 31 to 34
collected by the microphone 1. The signal received by the receiving antenna 8 is amplified by the
high frequency amplifier 9 ', sent to the relay 14 and sent to the detector 10 where it is detected,
and further activated by the relay 14-. The voltage is increased at i1, further sent to the rectifier
12 and rectified there, and then sent to the switching circuit 13. As described above, since the
switching circuit 13 is sequentially switched by one switching pulse from the frequency divider
18 in a cycle of 1 channel 1 to 3 seconds, the rectified voltage is 51 to 3 seconds per channel.
After being switched once and stored in the storage circuit shown in FIG. 3 once in a cycle of 1),
they are supplied as control voltages to automatic gain control circuits in the preamplifiers 23 to
26 of each channel. The above storage circuit may be a known one, for example, used in a remote
volume control-control device of a television. In this memory circuit, for example, when the
microphone input signal voice is small and the control voltage applied to the terminal 35 is small,
the charge pressure of the memory capacitor q is also small and the output voltage of the FITQ of
the source follower connection configuration is also small. Therefore, the PNP transistor Q2
conducts and its emitter voltage is at the ground level. Therefore the power supply ?! The base
voltage is applied, the voltage is conducted at the terminal 36, and the voltage at the terminal 36
is low.
The bias voltage to the pre-amplifier is small. However, when the microphone input signal voice
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is large and the control voltage applied to the terminal: 1 ISK is large, the charge voltage line of
the microcomputer V-one is large, F1! The outpost market pressure of 1TQ1 is also large.
Therefore, the furnace transistor Q2 does not conduct. Thus, the emitter voltage of the NPN)
transistor QS, which is conducted with the power supply V nosed at the base, is raised), the
voltage at the terminal 36 is also raised, and thus the bias voltage to the preamplifier is
increased. Due to these, for microphone input signal speech, the gain of the preamplifier is K as
shown by the characteristic curve a of FIG. 1, and now the remote adjustment transmission unit
37 is provided before listening. For the speaker arrangement shown in FIG. 5, when the unit is
operated at its center position A, the input to the microphone 1 has substantially the same
volume for four channels, and the gain of the preamplifiers 23 to 26 is also substantially It is the
same size. Next, when the listener moves the remote adjustment transmission unit 37 to position
B in the figure and operates, the input to the microphone 1 increases only for the second
channel, compared to the position-on case, Other page end page: 25, "" '+-2-in the case of
decrease. Thus, the gains in the preamplifiers 23--26 decrease only in the second amplifier 24
(which decreases for the other channels and increases for the preamplifiers 2B, 28. 26 of the
other channels). On the other hand, at other positions as well, the gains of the preamplifiers 23 to
26 are adjusted in inverse proportion to the microphone input, and the volume balance of the
four channel speakers 31 to 34 is automatically adjusted accurately. By the memory function of
the above-mentioned memory capacitor q, even if the voice signal of-Toyokawa is lost, the gain of
each of the preamplifiers 23 to 26 is held at its ttsi + integer value. As described above, the multichannel volume balance remote control system according to the present invention (accordingly,
the audio signal for adjustment is sequentially added to each channel and amplified by the
amplifier of each channel, and then the speaker of each channel) The signal sound is emitted,
each signal sound is received by one non-directional microphone, this is transmitted and received
by radio waves or ultrasonic waves, the gain of each channel amplifier is adjusted according to
the signal, and each channel mentioned above The sound volume balance of the speakers can be
balanced, rounded, and the adjustment can be accurately made, etc. Fig. 1 and Fig. 2 respectively
show the present invention by the present invention, Maruchi, Chichi Yanner i. Fig. 3 is a block
diagram of a transmitting system and a receiving system according to an embodiment of the
quantity balance remote adjustment system, Fig. 3 is a specific circuit diagram of a memory
circuit used in an embodiment, and Fig. 4 is a preamplifier Gain and It is a figure which shows
the positional relationship of a microphone input and gap adjustment transmission unit.
1 ... nondirectional microphone, 2. r't: amplifier, 4: converter, 7: transmission anti, na, 8:
reception antenna, 10: detector, 12: adjustment. Flow device, '1.3 F, 16 ... switching circuit, 14 ...
relay, 1, 5 ... audio signal generator, 17 ... switching pulse generator, 18 ... divider, ?23 ░ to 26
иии Pre-amplifier, 31 to 34 иии Speaker, 37 иии Remote adjustment transmission wind knit, q иии
Memory capacitor. . Fig. 1-Fig. 2 End Page: ?
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