JPH0325964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a plurality of audio source devices that reproduce audio signals as input sources, and selects and amplifies the audio signals reproduced by the audio source devices. The present invention relates to a control device for controlling an audio equipment system including an acoustic amplifier for driving a speaker, and particularly relates to a control device suitable for use in an audio equipment system that can be remotely controlled by a remote control device.

(b) Conventional technology CD player (compact disc player),
An audio equipment system is known that is comprised of an audio source device such as a tuner, tape deck, or record player, and an audio amplifier for selectively inputting and amplifying the audio signal reproduced by the audio source device and driving a speaker. It is being The audio equipment system may be a component type in which each of the sound source devices and the audio amplifier are formed separately, or an integrated type in which each of the sound source devices and the audio amplifier are incorporated in the same housing. exist. The component type audio equipment system is separated by function and can be designed individually, so it is possible to reduce the influence on each other's devices, which is advantageous for improving sound quality, but on the other hand, it increases manufacturing costs. . On the other hand, an integrated audio equipment system can reduce manufacturing costs because the power supply, circuit board, and housing can be used in common, but it is disadvantageous in improving sound quality because each device affects each other. .

By the way, recent audio equipment systems, for example as described in Japanese Patent Laid-Open No. 52-132814, switch the audio signal input to the audio amplifier according to the activated audio source device without manual operation. Some devices have an auto-function function in which the function switch automatically switches.

Furthermore, many audio equipment systems are equipped with a remote control device (hereinafter referred to as a remote control device) and can be operated remotely using the remote control device. Recently, some remote control devices have been designed to allow the entire audio equipment system to be controlled with a single remote control device.

Providing the above-mentioned autofunction function and controlling the entire audio equipment system with a single remote control device is an integrated audio equipment where wiring between each device can be freely made inside the housing. In a system, it is easy to provide one control circuit that controls all the devices that make up the system, and to supply control signals generated from the control circuit to each device. It's easy to achieve.

(c) Problems to be solved by the invention On the other hand, it is necessary to provide the above-mentioned autofunction function to a component type audio equipment system and to control the entire audio equipment system with a single remote control device. In addition to forming an acoustic signal path for supplying the acoustic signal reproduced by each acoustic source device to the acoustic amplifier, it is also necessary to form a control signal path for controlling each device. Since each acoustic source device must be connected by a cord, each device must be provided with a terminal for forming a control signal path. Therefore, in order to perform centralized control using a single control circuit like the integrated audio equipment system described above, it was necessary to provide each device with multiple terminals depending on the number of devices to be controlled. In a functionalized audio equipment system or an audio equipment system in which various operations can be performed by a remote control device, the number of terminals for forming the control signal path in each device becomes enormous. However, it is not a good idea to simply provide each device with a control circuit equivalent to the above-mentioned control circuit, as this increases manufacturing costs and requires designing the control circuit individually for each device.

The present invention aims to provide a control device for an audio equipment system, which is made in view of the above-mentioned points.

(d) Means for Solving the Problems The present invention provides an acoustic amplifier with a central control circuit that generates a data signal including a selection signal for selecting an audio source device and centrally controls the audio equipment system. Different preset signals are applied to each of the plurality of sound source devices depending on the sound source device, and a decoder is provided that operates in accordance with a selection signal included in a data signal generated from the central control circuit. Features.

(E) Function The present invention includes a selection signal in a predetermined bit of a data signal generated from a centralized control circuit provided in an acoustic amplifier, and also includes a selection signal in a decoder provided in each of a plurality of acoustic source devices. Different preset signals are applied correspondingly to the selection signals, and only the decoder of a predetermined audio source device is operated in accordance with the selection signal.

(F) Embodiment FIG. 1 shows an embodiment of the present invention, in which reference numerals 1 to 4 are first to fourth audio source devices that reproduce audio signals as input sources, and 5 is the first to fourth audio source devices. This is an acoustic amplifier that selects and amplifies the acoustic signals reproduced by the four acoustic source devices 1 to 4, and drives a speaker (not shown) according to the selected acoustic signal. The acoustic amplifier 5 is the acoustic amplifier 5
It is composed of a main circuit 6, which is a circuit section for performing the main operations of acoustic signal control and acoustic signal amplification, and a microcomputer that centrally controls the first to fourth acoustic source devices 1 to 4. It is equipped with a centralized control circuit 7, which includes:
In response to a signal generated from a switch control circuit 8 provided in the acoustic amplifier 5 and accompanying the operation of an operation switch (not shown) provided on the front panel of the acoustic amplifier 5, or when the remote control device 9 is operated. , generates an 8-bit serial data signal in response to a remote control signal generated from a remote control receiving circuit 10 provided in the acoustic amplifier 5, which accompanies the operation of the remote control device 9. Here, the remote control device 9 is a shared type that can operate the acoustic amplifier 5 and the first to fourth acoustic source devices 1 to 4, and is a shared type that can operate the acoustic amplifier 5 and the first to fourth acoustic source devices 1 to 4. The operation sections 9a to 9 are divided into four sections.
e is provided.

On the other hand, the first to fourth sound source devices 1 to 4
are, for example, a CD player, a tuner, a tape deck, and a record player, and the audio amplifier 5 is
is connected to the acoustic amplifier 5 by a plurality of cords, and an acoustic signal path and a control signal path are formed between the acoustic amplifier 5 and the acoustic amplifier 5. The first to fourth acoustic source devices 1 to 4 are respectively connected to the centralized control circuit 7 of the acoustic amplifier 5 by the control signal path, and the encoded serial signals generated from the centralized control circuit 7 are connected to the central control circuit 7 of the acoustic amplifier 5 through the control signal path. It includes decoders 11 to 14, which are configured with microcomputers that decode data signals into parallel data signals.

Here, there are four control signal paths connecting the centralized control circuit 7 and each decoder 11 to 14;
The data signal is transmitted through a control signal path connecting the first terminal 5a of the acoustic amplifier 5 and the first terminals 1a to 4a of the first to fourth acoustic source devices 1 to 4, and the data signal is transmitted to the second terminal of the acoustic amplifier 5. 5b and 1st
A clock signal of a constant period for notifying the timing of reading the data signal is transmitted through the control signal path connecting the second terminals 1b to 4b of the fourth acoustic source devices 1 to 4, respectively, and the clock signal is transmitted to the acoustic amplifier 5.
the third terminal 5c and the first to fourth acoustic source devices 1
A direction identification signal is transmitted through the control signal path connecting the respective third terminals 1c to 4c of the central control circuit 7 to the decoders 11 to 14, and indicates that the data signal and clock signal are to be transferred from the central control circuit 7 to the decoders 11 to 14. First to fourth sound source devices 1
A direction identification signal indicating that the data signal and clock signal are to be delivered in the direction toward the central control circuit 7 through the control signal path connecting the fourth terminals 1d to 4d of each of the four terminals 1d to 4d of the acoustic amplifier 5 and the fourth terminal 5d of the acoustic amplifier 5. is transmitted. The direction identification signal is transmitted to the central control circuit 7 by a control signal path connecting the fourth terminals 1d to 4d of the first to fourth acoustic source devices 1 to 4 and the fourth terminal 5d of the acoustic amplifier 5.
When transmitted to the central control circuit 7, data signals and clock signals are transmitted from the decoders 11 to 14 to the central control circuit 7, and the data signals select input signals provided to the acoustic amplifier 5 according to the operated acoustic source device. This is for an auto-function function that automatically switches a function switch (not shown), or a synchronization function that causes a tape deck to perform recording operations simultaneously in response to the operation of an audio source device.

The data signals decoded by the decoders 11 to 14 are supplied to a control circuit provided in each of the audio source devices 1 to 4, and the control circuit controls the audio signal, which is the main operation of the audio source device, according to the data signal. The main circuit that serves as the circuit for reproducing is controlled. That is, to explain in terms of the first sound source device 1, a serial data signal output from the centralized control circuit 7 is decoded into a parallel data signal by the decoder 11, and then sent to the control circuit 1.
At this time, the decoder 11 outputs "1" only from a predetermined one of the plurality of input/output terminals in response to the data signal output from the central control circuit 7. , outputs "0" from the other input/output terminals, so that "1" is input only to a predetermined one input terminal among the plurality of input terminals included in the control circuit 15, and "0" is input to the other input terminals. " is input. The control circuit 15 also outputs "1" from one predetermined output terminal and outputs "0" from the other output terminal in response to the operation of an operation switch provided on the front panel of the first sound source device 1. An output signal from a switch control circuit 16 is supplied. When a predetermined operation switch is operated, the switch control circuit 16 sends the control circuit 1 to the control circuit 1.
The signal supplied to the control circuit 5 is the same as the signal supplied from the decoder 11 to the control circuit 15 when an operation button (not shown) of the remote control device 9 corresponding to the operation switch is operated. Decoder 1
1 and the output of the switch control circuit 16 is input to the control circuit 15.

By the way, the data signal output from the central control circuit 7 is 8-bit serial data as described above, but 2 bits of it have a meaning such as detecting double pressing of the operation button of the remote control device 9. If it is, the remaining 6 bits can control the first to fourth acoustic source devices 1 to 4. The 6-bit data signal can perform 2 to the 6th power, that is, 64 types of control, but here, the 6-bit data signal is divided into D ₁ to D ₆ in the order of the bits that are output earlier in time. Then, as shown in FIG. 2, two bits _D5 and _D6 are used as selection signals for selecting the audio source device. That is, if _D5 and _D6 are both "0", the first sound source device 1 is controlled, and if _D5 and _D6 are "1" and "0", respectively, the second sound source device 2 is controlled. and if D ₅ and D ₆ are "0" and "1", respectively, the third sound source device 3
, and if both D ₅ and D ₆ are “1”, it means a data signal that controls the fourth sound source device 4 . Therefore, the first to fourth sound source devices 1 to 4 are arranged in 2 to the 4th power, that is, 16
You will be able to control the streets.

By the way, the decoders 11 to 14 provided in the first to fourth sound source devices 1 to 4, respectively
are made up of the same thing. Therefore, in order to make the data signals _D5 and _D6 have meaning as selection signals, each of the decoders 11 to 14 is provided with input terminals called first and second preset terminals. The preset terminal is connected to the power supply voltage (+B) or ground depending on the sound source device. Here, the decoders 11 to 1
4 compares the signal applied to the first preset terminal with the data signal _D5 and the signal applied to the second preset terminal with the data signal _D6 , respectively;
The previous data signal is decoded into a parallel signal only when they both match. And the first
The first and second preset terminals 11a and 11b of the decoder 11 provided in the sound source device 1 are both connected to ground, and the first and second preset terminals 11a and 11b of the decoder 12 provided in the second sound source device 2 are connected to the ground. The terminals 12a and 12b are connected to the power supply voltage (+B) and ground, respectively, and the first and second preset terminals 13a and 13b of the decoder 13 provided in the third audio source device 3 are connected to the power supply voltage (+B), respectively. ) and are connected to the first and second preset terminals 14a and 1 of the decoder 14 provided in the fourth sound source device 4.
4b are both connected to the power supply voltage (+B).
Therefore, if the voltage level of the power supply voltage (+B) is made to correspond to the digital signal "1" and the ground voltage level is made to correspond to the digital signal "0", the first
When a data signal in which both _D5 and _D6 are "0" is input to the decoder 11 of the audio source device 1, the decoder 11 decodes the data signal and decodes the second data signal.
When a data signal in which D ₅ and D ₆ are "1" and "0" is input to the decoder 12 of the sound source device 2, the decoder 12 decodes the data signal and decodes the data signal. Decoder 13
When a data signal in which _D5 and _D6 are "0" and "1", respectively, is input, the decoder 13 decodes the data signal and outputs the data signal to the fourth sound source device 4.
When a data signal in which both D ₅ and D ₆ are "1" is input to the decoder 14, the decoder 14 decodes the data signal.

Now, for example, the remote control device 9 is configured to control the first sound source device 1 using the remote control device 9.
2. Operate a predetermined operation button on the operation section 9b. Then, the remote control receiving circuit 10 receives this information and supplies a corresponding remote control signal to the central control circuit 7. Therefore, the centralized control circuit 7 generates a data signal according to the operation of the remote control device 9. The data signal is output from the first terminal 5a of the acoustic amplifier 5, and is transmitted to the first to fourth acoustic source devices 1 to 4.
are supplied to decoders 11 to 14 via respective first terminals 1a to 4a. At the same time, a clock signal and a direction identification signal are sent from the central control circuit 7 to the second and third channels of the acoustic amplifier 5, respectively.
The second terminals 1b to 4b and the third terminals 1c to 4c of the first to fourth acoustic source devices 1 to 4 are outputted from the terminals 5b and 5c, respectively.
is supplied to. However, since the remote control device 9 is performing an operation to control the first sound source device 1, the data signals D ₅ and D ₆ generated from the central control circuit 7 are always as shown in FIG. Both are "0". Therefore, only the decoder 11 provided in the first audio source device 1 operates, and the data signal is decoded only by the decoder 11. The decoded data signal is input to the control circuit 15, so that the control circuit 1
5 controls the main circuit 17 according to the data signal. Therefore, the main circuit 17 operates according to the operation of the remote control device 9. On the other hand, when the decoder 11 decodes the data signal and generates the decoded data signal to the control circuit 15, the decoder 11 generates a direction identification signal to the central control circuit 7 and also outputs the data signal and the decoded data signal to the control circuit 15. generates a clock signal to inform the central control circuit 7 that the operation of the first sound source device 1 has been realized;
One operation is completed.

Furthermore, when the remote control device 9 performs an operation to control the second to fourth sound source devices 2 to 4, the central control circuit 7 includes D ₅ and D ₆ determined according to the sound source devices to be controlled. Since the data signal is generated, the main circuit of the predetermined audio source device is connected to the remote control device 9 for the same reason as described above.
It operates according to the operation.

Note that when an operation is performed to control the acoustic amplifier 5 using the remote control device 9, the central control circuit 7 does not generate data signals to be supplied to the decoders 11 to 14, and only controls the main circuit 6 of the acoustic amplifier 5. Control.

By the way, the operation of controlling the audio source device by the remote control device 9 described above is for putting the audio source device into a playback or reception state, that is, for example, if the audio source device is a CD player, tape deck, or record player, the operation is a playback switch. In the case of an operation of a band changeover switch that selects a receiving band in the case of a tuner, the central control circuit 7 controls the main circuit 6 of the acoustic amplifier 5, and switches the function switch ( (not shown) depending on the sound source device being played or received.

Next, the case where reproduction is performed by operating the main bodies of the first to fourth sound source devices 1 to 4 will be explained.

For example, in order to put the first sound source device 1 into a playback state, a playback switch (not shown) provided on the first sound source device 1 is operated. Then, the switch control circuit 16 outputs "1" from a predetermined terminal of the plurality of output terminals and "0" from the other terminals in response to the operation of the playback switch, and the control circuit 15 outputs the main circuit 17 accordingly. Generates a signal to enter the playback state. Therefore, the main circuit 17 enters the regeneration state. Further, when the switch control circuit 16 generates an output signal corresponding to the operation of the playback switch, the decoder 11
is assumed to be in the reproducing state, and a signal is supplied to the central control circuit 7 to inform the central control circuit 7 of this fact. Therefore, the centralized control circuit 7 switches the function switch of the main circuit 6 of the acoustic amplifier 5 in accordance with the signal supplied from the decoder 11, so that the reproduction signal of the first acoustic source device 1 is transmitted to the acoustic amplifier 5. so that it is entered in Therefore, the acoustic signal reproduced by the first acoustic source device 1 is transmitted to the acoustic amplifier 5.
Since the signal is amplified by the acoustic signal and supplied to a speaker (not shown) connected to the acoustic amplifier 5, the speaker performs a performance according to the acoustic signal.

(G) Effects of the Invention As described above, according to the present invention, a selection signal is included in a predetermined bit of a data signal generated from a centralized control circuit provided in an acoustic amplifier, and each of a plurality of acoustic source devices is Different preset signals are applied to the decoders provided in the plurality of sound source devices, respectively, corresponding to the sound source devices, and only the decoder of a predetermined sound source device is activated in accordance with the selection signal. It is possible to provide a control device for an audio equipment system in which the plurality of audio source devices can be controlled by the centralized control circuit using the same decoder for each.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is an explanatory diagram showing data signals generated from the central control circuit. Explanation of main figure numbers: 1, 2, 3, 4...Acoustic source device, 5...Acoustic amplifier, 7...Centralized control circuit, 11, 12, 13, 14...Decoder.

Claims (1)

[Claims] 1. In an audio equipment system consisting of a plurality of audio source devices that reproduce audio signals that serve as input sources, and an audio amplifier that selects and amplifies the audio signals reproduced by the audio source devices and drives a speaker. , the acoustic amplifier is provided with a centralized control circuit for centrally controlling the audio equipment system, and each of the plurality of audio source devices is provided with a decoder for decoding the encoded data signal generated from the central control circuit. , a selection signal for determining the audio source device to be selected is included in a predetermined bit of the data signal generated from the central control circuit, and different preset signals are applied to the decoder depending on the audio source device,
A plurality of sound source devices can be controlled via the centralized control circuit by comparing the preset signal and the selection signal in the decoder and operating only the decoder of a predetermined sound source device in accordance with the selection signal. A control device for an audio equipment system, characterized in that: