JP2014082721A - Multi-speaker control apparatus, speaker device, and multi-peaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of, when supplying audio data to a plurality of speaker devices, mutually connecting therebetween with more simplicity.SOLUTION: A multi-speaker control apparatus includes an interface section that generates a superposition signal by superposing an audio signal over a power signal, and an audio output terminal that guides the superposition signal to a speaker device by riding the superposition signal on one cable. The speaker device includes an interface section that inputs and outputs a superposition signal obtained by superposing an audio signal over a power signal, an amplifier that amplifies the audio signal, and a speaker that outputs the amplified audio signal.

Description

  Embodiments described herein relate generally to a multi-speaker control device, a speaker device, and a multi-speaker system.

  A multi-channel playback device or a multi-channel playback speaker device that can be easily connected to each other has been proposed (see, for example, Patent Document 1).

  A multi-channel playback device for inputting audio data as a solving means, processing the input audio data by a signal processing circuit, supplying the processed signals to a plurality of speaker devices arranged in a distributed manner, and outputting the audio, wherein the signal processing The circuit compresses the input audio data into a plurality of channel data, compresses the plurality of channel data converted by the conversion unit for each channel data, and assigns a channel identifier to each of the compressed channel data. It is described that the signal processing means for generating the multi-channel output signal is provided.

  However, in Patent Document 1, the wiring connected to the speaker device is separated from the audio signal and the power supply line. There is a need for a technique that can more easily connect each other.

JP 2004-23549 A

  An object of the embodiment of the present invention is to provide a technique capable of more easily connecting each other when audio data is supplied to a plurality of speaker devices.

  In order to solve the above-mentioned problem, according to the embodiment, a multi-speaker control device includes an interface unit that generates a superimposed signal by superimposing an audio signal on a power signal, and a speaker device that places the superimposed signal on a single cable. And an audio output terminal that leads to

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the whole one Embodiment of this invention. The block block diagram which shows the Example of each speaker apparatus of the embodiment. 4 is a diagram showing an example of the interface circuit 201 of the embodiment. FIG. The figure which shows the Example of the serial audio | voice data of the embodiment. The figure which shows the Example of the power supply and audio | voice superimposition signal used for the embodiment. The figure which shows the Example of the circuit which isolate | separates the power supply and audio | voice superimposition signal of the embodiment. The figure which shows the Example of the circuit which synthesize | combines the power supply and audio | voice signal used for the embodiment. The figure which shows the Example of the circuit which converts the serial audio | voice signal used for the embodiment into an analog signal. The block block diagram shown in order to demonstrate an example of the optical disk reproducing device concerning the embodiment.

  Hereinafter, an embodiment will be described in detail with reference to the drawings.

  FIG. 9 shows an example of the optical disk playback apparatus 11 as an audio playback apparatus described in this embodiment. The optical disk playback apparatus 11 has a disk drive unit 13 to which an optical disk 12 such as a DVD can be attached and detached.

  The disk drive unit 13 reads the recorded digital signal from the mounted optical disk 12 and outputs it to a DSP (digital signal processor) unit 14. The DSP unit 14 performs predetermined digital signal processing on the input digital signal and separates the video signal, the main audio signal, and the sub-effect audio signal.

  The video signal separated by the DSP unit 14 is supplied to the video signal processing unit 15 and subjected to predetermined video signal processing such as decoding processing, and then the output is sent to an HDMI (high definition multimedia interface) transmission unit 18. It is also input from the video / audio output terminal 19 as a signal in which video and audio compliant with the HDMI standard used in recent years are superimposed.

  The sub-effect audio signal separated by the DSP unit 14 is supplied to the sub-effect decoder unit 17. The sub-effect decoder 17 performs a predetermined decoding process on the input sub-effect audio signal, converts it to a sub (2 channel) effect (2 channel) PCM (pulse code modulation) signal, and HDMI. The data is output to the transmission unit 18.

  The HDMI transmission unit 18 performs conversion processing conforming to the HDMI standard on the PCM main audio signal, and outputs the converted signal to the outside via the video / audio output terminal 19. That is, the HDMI transmission unit 18 can output the sub-effect audio signal of the sub (2 channels) / effect (2 channels) to the outside through the video / audio output terminal 19 with the same number of channels. .

  Further, the main audio signal separated by the DSP unit 14 is supplied to the main decoder unit 20. The main decoder unit 20 performs a predetermined decoding process on the input main audio signal, converts it to a PCM signal of 22.2 channels at the maximum, and outputs it to the mixer unit 21.

  The mixer unit 21 mixes a maximum 22.2 channel audio signal converted to PCM and a DC or AC power supply voltage (not shown) to generate a superimposed audio signal, which is output to an IF (interface) unit 22. doing. The IF unit 22 performs conversion processing based on the external interface standard on the input superimposed audio signal, and outputs the converted signal to the outside via the audio input / output terminal 23. In other words, the IF unit 22 can output the superimposed audio signal to the outside via the audio input / output terminal 23. The IF unit 22 can also input a superimposed audio signal from the outside via an audio input / output terminal 23.

  Here, in the optical disk reproducing apparatus 11, all the operations including the above-described various reproducing operations are comprehensively controlled by the control unit 24. The control unit 24 includes a CPU (Central Processing Unit) and the like, and the operation content is reflected based on operation information received from the operation unit 25 or from the remote controller 26 via the light receiving unit 27. Each part is controlled individually.

  In this case, the control unit 24 uses the memory unit 28. The memory unit 28 mainly includes a ROM (read only memory) storing a control program executed by the CPU, a RAM (random access memory) providing a work area for the CPU, various setting information, control information, and the like. Is stored in a non-volatile memory.

  FIG. 1 shows an example of the entire embodiment. The optical disk playback device 11 functions as a multi-speaker control device 101 that controls the speaker devices 102 to 123, and the speaker devices 102 to 123 are all speaker devices with built-in amplifiers.

  The sound output from the speaker devices 102 to 123 is controlled by the multi-speaker control device 101, and the power and audio data for driving each speaker device are transmitted to the next speaker device connected in cascade. It is characterized by the construction of multi-speakers.

It is desirable to arrange the speaker devices as evenly as possible, and it is desirable to set the sound field such that the listening point is the center where the speakers are arranged.
FIG. 2 is a diagram for explaining a system including the individual speaker devices 102 to 123 shown in FIG.
From the power supply and serial audio data input from the multi-speaker control apparatus 101, each speaker apparatus takes out the power supply by the interface circuit 201, further demodulates the serial audio data, amplifies the audio data by the amplifier 202, and the speaker 203. It is the structure which makes a sound by driving.

FIG. 3 shows an embodiment of the interface circuit 201 shown in FIG.
The power source / signal separation unit 301 separates the power source and the serial audio data.
The audio data in FIG. 4 is input from the power source / signal separation unit 301 to the in-information SP_No detection unit 302.
The in-information SP_No detecting unit 302 extracts speaker information data superimposed on the serial audio data, and detects the current speaker No. from the information.
The SP_No audio signal extraction / decode detection unit 304 extracts and decodes the audio data of the speaker No detected by the in-information SP_No detection unit 302 from the serial audio data separated by the power / signal separation unit 301.

  The in-information SP_No increment unit 303 increments the speaker No. detected by the in-information SP_No detection unit 302 to generate serial audio data to be sent to the next cascade-connected speaker device.

  The power source / signal synthesis unit 305 synthesizes the power source separated by the power source / signal separation unit 301 and the serial audio data in which the speaker No is changed by the SP_No increment unit 303 in the information, and then transmits the synthesized speech to the speaker devices connected in cascade. Create a signal.

  The in-information SP_position information extraction unit 306 extracts speaker position information for knowing the position of the speaker from the speaker information data extracted by the in-information SP_No detection unit 302. If the speaker position information and the speaker No are equal, the information is displayed. The position of the speaker can be known by illuminating the device 307.

  The display device 307 is a display device for informing the listener of the position of the speaker. For example, it can be configured by displaying using an LED or displaying the speaker No. as a numerical value.

  In this embodiment, an example in which 22 speaker devices are installed is shown. However, the speakers need to be arranged around the listening point, and the 22 speaker devices can be arranged as evenly as possible. desirable.

  Regarding the setting of the sound field, the sound field cannot be set unless the speaker control device 101 determines which speaker device is the speaker device arranged at the front center of the listener.

  Therefore, the display device 307 is used as a means for knowing the location of the speaker device serving as the front center. The position information of each speaker is sequentially sent from the speaker control device 101, and the information is displayed on the display device 307 of each speaker device. For example, if the speaker position information of No. 10 is sent, the display of the tenth speaker device 111 changes. By doing in this way, it becomes possible to know what number is the speaker No. of the speaker device that is the front center.

FIG. 4 shows an example of serial audio data.
The serial audio data is configured as a set of information data about speakers and audio data output from a plurality of speakers. Speaker information data and speaker position information detection data are added to this information data.

The speaker No data output from the multi-speaker control device 101 of FIG. 1 is 1, and is incremented every time it passes through the speaker device.
And the speaker No data of the signal that has passed through all the speaker devices and returned to the multi-speaker control device 101 has the value of the number of speaker devices + 1.
Note that the speaker-related information data is preferably located at the beginning or end of the serial audio data. This is because adding the information for dividing the block of the serial audio data together with the speaker information data serves as a guideline for extracting the serial audio data. In this embodiment, it is arranged first.

In the case of compressing 22 serial audio data, the original analog data may be converted to digital data by increasing the frequency 22 times or more.
FIG. 5 shows an example of a signal in which serial power data and a power source for transmission between speaker devices are superimposed.
In this embodiment, the power source is a DC power source, but the same effect can be obtained even if it is an AC power source.
FIG. 6 shows an embodiment of the power / signal separation unit 301 of FIG.
An LPF (low-pass filter) 601 separates a speaker driving power source, which is a low-frequency signal, and a serial audio signal, which is a high-frequency signal, is separated by an HPF (high-pass filter) 602.

FIG. 7 shows an embodiment of the power / signal combiner 305 in FIG.
Reference numeral 701 denotes a DC-DC conversion circuit that regenerates power from the original power supply, reference numeral 703 denotes a capacitor C for superimposing a serial audio signal on the power supply signal, and reference numeral 702 denotes a high frequency between the DC-DC conversion circuit 701 and the capacitor C703. Inductance L.

FIG. 8 shows an example of the SP_No audio signal extraction / decode detection unit 304 of FIG.
801 is a serial parallel circuit that extracts serial audio data corresponding to the speaker No. and converts it into parallel data. 802 is an extension of the audio data converted in parallel by the serial parallel circuit 801 to the actual time axis and time axis expansion to adjust the phase. The & phase adjustment circuit 803 is a D / A conversion circuit that converts the parallel audio data converted into the real time by the time axis extension & phase adjustment circuit 802 into analog audio.

Examples of modifications of the embodiment include the following.
In the embodiment of FIG. 1, wiring is connected from the speaker device 123 to the multi-speaker control device 101. However, when the number of speakers to be connected is determined at the time of manufacturing the system, for example, it is not necessarily in a ring shape. It is not necessary to connect.

  The power supply (power supply voltage and power signal) supplied to each speaker device is a DC power supply in the embodiment, but the same can be realized with an AC power supply. In that case, the DC-DC conversion circuit 701 in FIG. 7 can be omitted. Even when the power supply is realized by a DC power supply, the DC-DC conversion circuit may be omitted as long as the S / N ratio due to power supply noise need not be taken into consideration.

  As described above, by connecting the speakers in cascade, wiring to a plurality of speakers is simplified, and the amount of wiring can be greatly reduced. Also, since the same speaker devices are connected in cascade, there is no miswiring. In addition, the restriction on the number of speaker devices is low, and a setting with a considerably high degree of freedom is possible. In addition, since the number of the speaker at the front center can be easily known, it is not necessary to strictly place the speaker.

  In this embodiment, the audio signal and the power supply line are superimposed and sent by one signal line. In this embodiment, the connection of speaker devices is in a loop shape, and the number of connected speaker devices can be automatically detected.

  That is, as compared with the prior art, the wiring for connecting the speaker devices is, for example, one coaxial line, so that simpler wiring can be achieved. In addition, since the number of speaker devices to be installed can be automatically detected by using the loop wiring, it is not necessary to worry about the number of speaker devices at the time of setting the sound quality of the sound field. This is particularly effective when wiring a large number of speaker devices having several tens or more.

  Multi-channel multi-speakers are being developed for Super Hi-Vision. However, in order to realize this function in ordinary homes, it is currently assumed that the wiring from the amplifier to each speaker will be considerably large, whereas the above is a method that can easily control and connect a multi-speaker system. .

(Summary and supplement of embodiment)
The following multi-speaker system was described.
(1) In a multi-speaker system apparatus using a plurality of speakers, a speaker apparatus having a speaker, an amplifier that amplifies an audio signal, and a means for demodulating an audio signal transmitted serially is regarded as one speaker apparatus. Multi-speaker system characterized by connecting multiple devices in cascade

(2) In the multi-speaker system device of (1) above, the serial data of the audio signal includes the speaker device's serial data so that the order in which each of the plurality of cascade-connected speaker devices is connected is known. Multi-speaker system having means for inserting a number and demodulating only the audio signal corresponding to that number by each speaker device

(3) In the multi-speaker system apparatus of (2), the multi-speaker system apparatus has means for setting the number of the next speaker apparatus to be cascade-connected in the previous speaker apparatus and transmitting it to the next speaker apparatus.

(4) In the multi-speaker system according to (1), each speaker device has means for separating and superimposing a signal in which a serial audio signal is superimposed on a power source for driving a plurality of speaker devices. system

(5) In the multi-speaker system of the above (1), a ring-like shape that finally returns to the device that controls the entire multi-speaker through the speaker device connected in cascade from the device that controls the entire multi-speaker. Multi-speaker system featuring connection

(6) In the multi-speaker system of (5) above, a multi-speaker system (for example, the control unit 24) can detect the number of speaker devices connected in cascade in a ring shape. Based on information obtained from the IF unit 22 through the voice input / output terminal 23 while using the memory unit 28. It is also possible to adopt a structure in which different terminals are used for voice output and voice input.

(7) In the multi-speaker system of (6), the multi-speaker system is characterized in that the sound setting can be changed according to the number of speaker devices detected by the device that controls the entire multi-speaker.

(8) In the multi-speaker system of (5) above, a multi-speaker system having means capable of determining the order of a plurality of speaker devices in the speaker device. (9) As means for determining the order of the speaker devices of (8) above. When a speaker device number is specified, a multi-speaker system having means for changing the display device of the speaker device of that number

In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, it can implement in various modifications.
Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 11 ... Optical disk reproducing device, 12 ... Optical disk, 13 ... Disk drive part, 14 ... DSP part, 15 ... Video signal processing part, 17 ... Sub-effect decoder part, 18 ... HDMI transmission part, 19 ... Video / audio output terminal, DESCRIPTION OF SYMBOLS 20 ... Main decoder part, 21 ... Mixer part, 22 ... IF part, 23 ... Audio | voice input / output terminal, 24 ... Control part, 25 ... Operation part, 26 ... Remote controller, 27 ... Light receiving part, 28 ... Memory part, 101 ... Multi-speaker control device, 102 to 123 ... speaker device, 201 ... interface circuit, 202 ... amplifier, 203 ... speaker, 301 ... power source / signal separation unit, 302 ... in-information SP_No detection unit, 303 ... in-information SP_No increment unit, 304 ... SP_No audio signal extraction / decode detection unit, 305 ... power supply / signal synthesis unit, 306 ... SP_position information extraction unit in the report, 307 ... display device, 601 ... LPF (low pass filter), 602 ... HPF (high pass filter), 701 ... DC-DC conversion circuit, 702 ... inductance L, 703 ... capacitor, 801 ... serial parallel Circuit, 802... Time axis expansion & phase adjustment circuit, 803... D / A conversion circuit.

Claims (4)

An interface unit that generates a superimposed signal by superimposing an audio signal on a power signal;
A multi-speaker control device including an audio output terminal that guides the superimposed signal to a speaker device on a single cable. An interface unit that inputs and outputs a superimposed signal in which an audio signal is superimposed on a power signal;
An amplifier that amplifies the audio signal;
A speaker device comprising: a speaker that outputs the amplified audio signal.   A multi-speaker system comprising the multi-speaker control device according to claim 1 and the speaker device according to claim 2 connected in cascade.   4. The multi-speaker system according to claim 3, wherein the end of the cascade connection is returned to the multi-speaker control device according to claim 1, and the number of the cascade connections is transmitted, and the sound setting is changed in accordance with the number.

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