JP5463634B2 - Audio signal processing apparatus, audio signal processing system, and audio signal processing method - Google Patents

Description

  The present invention relates to a technique for facilitating the wiring of devices in an audio signal processing system such as a PA (Public Address) system.

In a mixer used in a PA system or the like, audio signals input from many microphones and musical instruments on the stage are assigned to each channel, and various parameters such as a volume value are controlled for each channel. Such mixers are expected to be improved in operability as the number of channels and the number of functions increase, and the user interface has been improved (for example, Patent Document 1).
JP 2006-1000094 A

  By the way, in order to recognize from which device the audio signal is being input to each input channel of the mixer, the user confirms in advance the wiring connecting the device and the mixer, and inputs the device and input. It was necessary to make a note of the relationship with the channel or set it to the mixer. Therefore, when the number of devices increases, it takes time to check the wiring. Also, when there is no sound related to the audio signal, it takes time to find the cause of the sound not being output, such as disconnection of wiring, connection error, or no audio signal being output from the connected device. Met.

The present invention has been made in view of the above circumstances, equipment and wiring conditions for connecting the mixer easily capable confirmation and to Luo Dio signal processing apparatus, audio signal processing system Contact and audio signal processing It aims to provide a method.

In order to solve the above-described problem, the present invention provides a plurality of input reception units to which an audio signal on which watermark information indicating identification information is superimposed is input, and audio signals input to the plurality of input reception units. Extraction means for extracting identification information from each of them, and display means for performing display corresponding to the identification information extracted by the extraction means in correspondence with the input receiving means to which the audio signal from which the identification information is extracted is input And a signal processing means for performing a preset signal processing on the audio signal input to the input receiving means and outputting, and a removing means for removing the watermark information superimposed on each audio signal. An audio signal processing apparatus is provided.

  In another preferred aspect, the signal processing means performs signal processing according to the identification information extracted by the extraction means on the audio signal from which the identification information has been extracted.

The present invention also provides identification information from a plurality of input receiving means to which an audio signal on which watermark information indicating identification information is superimposed is input, and from each of the audio signals input to the plurality of input receiving means. extraction means for extracting a signal processing according to the identification information extracted by the extracting means, signal processing means for outputting by subjecting the audio signal to which the identification information is extracted, it is superimposed to the each audio signal An audio signal processing apparatus comprising: a removing unit that removes the watermark information .

  In another preferred aspect, the signal processing means synthesizes and outputs the audio signals subjected to signal processing.

  In another preferred aspect, the audio signal from which the watermark information has been removed by the removing unit further includes a re-superimposing unit that superimposes the watermark information.

  In another preferred embodiment, the signal processing means performs signal processing on the audio signal from which the watermark information has been removed by the removing means, and the re-superimposing means is an audio signal processed by the signal processing means. The watermark information is superimposed on the signal.

  In addition, the present invention provides the above-described audio signal processing apparatus, an identification information superimposing apparatus comprising identification information superimposing means for superimposing and outputting watermark information indicating identification information on the supplied audio signal, An audio signal processing system comprising: an audio signal output by the identification information superimposing unit and transmitting to the input receiving unit.

  In another preferable aspect, the identification information superimposing device further includes a plurality of input terminals to which supplied audio signals are input and provided corresponding to the input receiving units, respectively. When the audio signals input to the input terminals and superimposed and output with the watermark information are combined, the input is performed so that the watermark information superimposed on the audio signals does not interfere with each other. Watermark information is superimposed on each audio signal input to the terminal.

  In another preferable aspect, the identification information superimposing device receives a plurality of supplied audio signals, and corresponds to each of the plurality of input terminals provided corresponding to each of the input receiving units. And setting means for setting identification information, wherein the watermark information superimposed by the identification information superimposing means is set for the supplied audio signal corresponding to the input terminal to which the audio signal is supplied. The identification information is displayed.

The present invention also provides an input reception process in which an audio signal on which watermark information indicating identification information is superimposed is input to each of the plurality of input reception units, and each of the audio signals input to the plurality of input reception units. An extraction process for extracting the identification information, and a display process for performing display according to the identification information extracted in the extraction process in response to the input receiving means to which the audio signal from which the identification information is extracted is input. , A signal processing process for performing a predetermined signal processing on the audio signal input in the input receiving process and outputting the signal, and a removing process for removing the watermark information superimposed on each audio signal. An audio signal processing method is provided.

The present invention also provides an input reception process in which an audio signal on which watermark information indicating identification information is superimposed is input to each of the plurality of input reception units, and each of the audio signals input to the plurality of input reception units. from an extraction step of extracting the identification information, a signal processing according to the identification information extracted in the extraction process, a signal processing step of outputting subjected to the audio signal to which the identification information is extracted, each An audio signal processing method comprising: a removal process for removing watermark information superimposed on the audio signal.

According to the present invention, what is readily ascertainable wiring status of connecting devices and a mixer and to Luo Dio signal processing device, it is possible to provide an audio signal processing system Contact and audio signal processing method.

  Hereinafter, an embodiment of the present invention will be described.

<Embodiment>
As shown in FIG. 1, a PA system 1 that is an example of an audio signal processing system according to an embodiment of the present invention includes musical instruments (a keyboard 110, a microphone 120, a drum 130, a guitar 140, a bass, and the like installed on a stage ST). 150), the identification information superimposing device 60 and the connector A10, the connector B20 and the mixer 30 installed in the PA booth PAB, the power amplifier 40, and the speaker 50. Connector A10 and connector B20 are connected by a multi-cable 15 and transmit audio signals from stage ST to PA booth PAB. FIG. 1 is an explanatory diagram showing the configuration of the PA system 1.

  Audio signals output from musical instruments installed on the stage ST are supplied to the mixer 30 installed in the PA booth PAB via the connector A10, the multi-cable 15 and the connector B20. The audio signal is subjected to signal processing such as volume control in the mixer 30 and synthesized, amplified by the power amplifier 40, and emitted from the speaker 50. Hereinafter, each configuration of the PA system 1 will be described.

  The keyboard 110 is an electronic piano, for example, and outputs an audio signal Sk according to the performance of the performer. On the audio signal Sk, identification information corresponding to the keyboard 110 is superimposed as watermark information. In this example, the identification information indicated by the watermark information superimposed on the audio signal Sk is information indicating “keyboard”. The identification information may be unique to the keyboard 110, such as the model number and name of the keyboard 110. Moreover, these may overlap.

  As a method of voice watermarking to be superimposed as watermark information on the audio signal Sk, various known methods using spread spectrum and the like that have little influence on hearing can be used. Of various methods, it is desirable to use a method capable of multiple superposition such that information remains even if synthesized with another audio signal, for example, a method using a pseudo noise signal using an M sequence or a Gold sequence.

  In addition, the frequency band on which the watermark information is superimposed is preferably a non-audible range, but in the audio signal path in the PA system 1, it is assumed that the used frequency band is only the audible range. There may be a configuration that blocks the non-audible range. In that case, an audible range may be used, and in that case, it is desirable to superimpose watermark information on a high frequency band (for example, 10 kHz or more) to reduce the influence on audibility. In the following description, a method for superimposing watermark information on an audio signal may be performed in the same manner as described above, and thus the description thereof is omitted.

  The microphone 120 is sound collection means such as a microphone, and outputs the collected sound as an audio signal Sm. In this audio signal Sm, identification information “microphone” corresponding to the microphone 120 is superimposed as watermark information. As described above, unlike a normal microphone, the microphone 120 has a configuration in which watermark information is superimposed on an audio signal indicating the collected sound.

  The drum 130 is provided with a drum set and a microphone that collects sound generated by hitting each percussion instrument of the drum set. This microphone outputs the sound collected as the microphone 120 as an audio signal Sd, and identification information “drum” is superimposed as watermark information on the audio signal Sd.

  The guitar 140 is, for example, an electric guitar and outputs an audio signal Sg according to the performance of the performer. The base 150 is an electric bass and outputs an audio signal Sb according to the performance of the performer. Unlike the audio signals Sk, Sm, and Sd, the audio signals Sg and Sb are not superimposed with identification information when output from the guitar 140 and the base 150.

  The identification information superimposing devices 60-1 and 60-2 (hereinafter referred to as the identification information superimposing device 60 when not distinguished from each other) are supplied with audio signals Sg and Sb from the guitar 140 and the base 150, respectively, and indicate identification information. The watermark information is superimposed and output. Here, the identification information superimposing device 60 will be described with reference to FIGS. FIG. 2 is a diagram illustrating an appearance of the identification information superimposing device 60. FIG. 3 is a block diagram illustrating a configuration of the identification information superimposing device 60.

  First, the appearance of the identification information superimposing device 60 will be described. As shown in FIG. 2, the identification information superimposing device 60 is a terminal to which a cable is connected, an input terminal 602-1 to which an audio signal is input, a terminal to which a cable is connected, and is input to the input terminal. An output terminal 602-2 that outputs an audio signal in which watermark information is superimposed on the audio signal that has been displayed has a display unit 601 and an operation unit 605 for displaying the contents of identification information to be superimposed as watermark information.

  Next, the configuration of the identification information superimposing device 60 will be described. As shown in FIG. 3, the operation unit 605 has an operator for determining the content of identification information to be superimposed as watermark information, and controls a signal indicating the content of the identification information determined by the user's operation. To the unit 608. In this example, one content is selected from a plurality of candidate contents as identification information. However, it may be determined by inputting characters as the contents of identification information.

  The storage unit 609 is a storage unit such as a non-volatile memory, and stores contents that are candidates for the identification information described above. The control unit 608 reads the identification information of the content corresponding to the signal input from the operation unit 605 from the storage unit 609, performs control to display the content of the read identification information on the display unit 601, and causes the superimposition unit 606 to display the content. On the other hand, the content of the identification information is set.

  The superimposing unit 606 superimposes the watermark information indicating the identification information set in the control unit 608 on the audio signal input from the input terminal 602-1 and outputs it to the output terminal 602-2. In this way, the identification information superimposing device 60 superimposes and outputs watermark information indicating identification information on the input audio signal.

  In this example, the identification information superimposing device 60-1 is set so that the audio signal Sg output from the guitar 140 is input, and the identification information “guitar” is superimposed and output as watermark information. Further, the identification information superimposing device 60-2 is set so that the audio signal Sb output from the base 150 is input, and the identification information “base” is superimposed and output as watermark information. The above is the description of the identification information superimposing device 60.

  Returning to FIG. 1, the description will be continued. The connector A10 is a connector BOX which has a plurality of input terminals to which a cable is connected and an audio signal is input, and which transmits each input audio signal to the connector B20 via the multi-cable 15. In this example, the connector A10 has five (5 channels) input terminals, and the keyboard 110, the microphone 120, the drum 130, and the identification information superimposing devices 60-1 and 60-2 are output to the respective input terminals. Audio signals Sk, Sm, Sd, Sg, and Sb are input and transmitted to the connector B20 via the multi-cable 15 respectively.

  Next, the connector B20 will be described with reference to FIGS. FIG. 4 is a diagram illustrating an appearance of the connector B20. FIG. 5 is a block diagram showing the configuration of the connector B20.

  First, the external appearance of the connector B20 will be described. As shown in FIG. 4, while receiving the input of each audio signal via the multi-cable 15 connected to the connector A10, the output terminals 202-1, 202-2, 202-3 to which the cable is connected are received. , 202-4, 202-5 (hereinafter referred to as output terminal 202 if not distinguished from each other). Further, the contents of the identification information indicated by the watermark information superimposed on each audio signal output from each output terminal 202 are displayed on the display units 201-1, 201-2, 201-provided corresponding to each output terminal 202. 3, 201-4, and 201-5 (hereinafter referred to as the display unit 201 when not distinguished from each other).

  Next, the configuration of the connector B20 will be described. As shown in FIG. 5, each audio signal transmitted from the connector A <b> 10 by the multi-cable 15 is output from each output terminal 202. The audio signal supplied to the output terminal 202-1 from the multi-cable 15 (in this example, the audio signal Sk) is also input to the extraction unit 203-1.

  The extraction unit 203-1 extracts watermark information superimposed on the input audio signal Sk, and outputs identification information indicated by the extracted watermark information. The display control unit 204-1 controls the display unit 201-1 to display the content of identification information ("keyboard") output from the extraction unit 203-1. Here, the extraction units 203-2, 203-3, 203-4, and 203-5 have the same functions as the extraction unit 203-1, and the input audio signals are the audio signals Sm, Sb, and Sd, respectively. , Sg.

  The display control units 204-2, 204-3, 204-4, and 204-5 have the same functions as the display control unit 204-1, and the display units 201-2, 201-3, 201-4, Control is performed so that “Mic”, “Bass”, “Drum”, and “Guitar” are displayed in 201-5. Note that when the audio signal is not transmitted to the connector B20 due to cable disconnection, instrument failure, or the like and no audio signal is input, the display on the display unit 201 may be undisplayed or not transmitted. You may display.

  In this way, in the connector B20 installed in the PA booth PAB, regardless of the connection relationship between the plurality of input terminals of the connector A10 installed on the stage ST and the cables connecting the plurality of musical instruments, respectively. Can recognize from which musical instrument the audio signal output from each output terminal 202 is output by confirming the display of each display unit 201 installed corresponding to each output terminal 202. . Further, when an audio signal is not transmitted to the connector B20 due to cable disconnection, instrument failure, or the like, the situation can be recognized. The above is the description of the connector B20.

  Returning to FIG. 1, the description will be continued. The mixer 30 is an example of an audio signal processing apparatus, and is connected to each output terminal 202 of the connector B20 with a cable. The mixer 30 adjusts and mixes the volume level of the audio signal output from each output terminal 202 of the connector B20. Output from. Here, the mixer 30 will be described with reference to FIGS. FIG. 6 is a view showing the appearance of the mixer 30. FIG. 7 is a block diagram showing the configuration of the mixer 30.

  First, the external appearance of the mixer 30 will be described. As shown in FIG. 6, the mixer 30 has input terminals 302-1, 302-2, 302-3, 302-4, 302-5 (hereinafter, not distinguished from each other) to which a cable is connected and an audio signal is input. In this case, it has an input terminal 302) and an output terminal 302-6 for outputting an audio signal St obtained by synthesizing the audio signals. That is, an input of 5 channels is accepted.

  The mixer 30 is an operation element for specifying the volume level of the audio signal of each channel input to each input terminal 302, and has operation elements 305-1 and 305- having operation elements corresponding to the respective channels. 2, 305-3, 305-4, and 305-5 (hereinafter referred to as an operation unit 305 if they are not distinguished from each other) and an operation unit that is an operator for designating the volume level of the audio signal St. 305-6.

  Further, the mixer 30 is provided corresponding to the operation unit of each operation unit 305, that is, corresponding to each input terminal 302, and identification information indicated by watermark information superimposed on the audio signal of each channel input to each input terminal 302. The display units 301-1, 301-2, 301-3, 301-4, and 301-5 (hereinafter referred to as the display unit 301 when they are not distinguished from each other) for displaying contents are provided. In the PA booth PAB, if either the display unit 201 or the display unit 301 is present, the contents of the identification information can be confirmed. Therefore, if the display unit 301 exists, the display unit 201 in the connector B20 is not provided. Conversely, if the display unit 201 in the connector B20 exists, the display unit 301 may be omitted.

  Next, the configuration of the mixer 30 will be described. As shown in FIG. 7, the audio signal (in this example, the audio signal Sk) input to the input terminal 302-1 is output to the extraction unit 303-1 and the signal processing unit 306-1. The extraction unit 303-1 extracts watermark information superimposed on the input audio signal Sk, and outputs identification information indicated by the extracted watermark information. The display control unit 304-1 controls the display unit 301-1 to display the content (“keyboard”) of the identification information output from the extraction unit 303-1. As described above, the extraction unit 303-1, the display control unit 304-1 and the display unit 301-1 are the same as the extraction unit 203-1, the display control unit 204-1 and the display unit 201-1 in the connector B20. It has a function.

  Similarly, the extraction units 303-2, 303-3, 303-4, and 303-5 have the same function as the extraction unit 303-1, and the input audio signals are the audio signals Sm, Sb, and Sd, respectively. , Sg. The display control units 304-2, 304-3, 304-4, and 304-5 have the same functions as the display control unit 304-1, and the display units 301-2, 301-3, 301-4, 301-5 is controlled to display "Mike", "Bass", "Drum", and "Guitar", respectively. When the audio signal is not transmitted to the mixer 30 due to cable disconnection, instrument failure, etc., and no audio signal is input, the display on the display unit 301 may be undisplayed or not transmitted. You may display.

  The signal processing unit 306-1 is set with an amplification factor corresponding to the volume level designated by the operator of the operation unit 305-1, and receives the audio signal Sk input to the input terminal 302-1 with the set amplification factor. Perform signal processing to amplify and output. Similarly to the signal processing unit 306-1, the signal processing units 306-2, 306-3, 306-4, and 306-5 operate the operation units 305-2, 305-3, 305-4, and 305-5. The amplification factor corresponding to the volume level designated by the child is set, and the audio signals Sm, Sb, Sd, Sg are amplified and output with the set amplification factor.

  The adding unit 307 outputs each channel output from the signal processing units 306-1, 306-2, 306-3, 306-4, and 306-5 (hereinafter referred to as the signal processing unit 306 when not distinguished from each other). The audio signals Sk, Sm, Sb, Sd, and Sg are combined (mixed) to be output as an audio signal St.

  The signal processing unit 306-6 sets an amplification factor corresponding to the volume level specified by the operation unit of the operation unit 305-6, and amplifies the audio signal St output from the addition unit 307 with the set amplification factor. Signal processing is performed and supplied to the output terminal 302-6.

  In this way, in the mixer 30 installed in the PA booth PAB, regardless of the connection relationship between the cables connecting the plurality of input terminals of the connector A10 installed on the stage ST and the plurality of musical instruments, respectively. Confirms the display of each display unit 301 arranged corresponding to the operation element for designating the volume level of the audio signal of each channel input to each input terminal 302, so that the volume level is determined by the operation of each operation element. Can be recognized as the output source instrument of the audio signal. Further, when an audio signal is not transmitted to the mixer 30 due to cable disconnection, instrument failure, or the like, the situation can be recognized. The above is the description of the mixer 30.

  Returning to FIG. 1, the description will be continued. The power amplifier 40 amplifies the audio signal St output from the output terminal 302-6 of the mixer 30 with a preset amplification factor and outputs the amplified signal to the speaker 50. The speaker 50 emits the audio signal St amplified by the power amplifier 40.

  As described above, the PA system 1 according to the embodiment of the present invention superimposes watermark information indicating identification information for identifying a musical instrument on an audio signal output from each musical instrument installed on the stage ST, and the PA booth PAB. The display unit 201 of the installed connector B20 and the display unit 301 of the mixer 30 display the contents of the identification information indicated by the watermark information superimposed on each audio signal.

  Therefore, the PA booth PAB recognizes the connection relationship regardless of the connection relationship between the cables connecting the plurality of input terminals of the connector A10 installed on the stage ST and the plurality of musical instruments. In addition, the volume level can be designated by recognizing the output instrument of the audio signal whose volume level should be controlled and operating the corresponding operator. Further, when an audio signal is not transmitted due to cable disconnection, instrument failure, or the like, the situation can be recognized at the PA booth PAB.

  As mentioned above, although embodiment of this invention was described, this invention can be implemented in various aspects as follows.

<Modification 1>
In the above-described embodiment, each signal processing unit 306 and signal processing unit 306-6 of the mixer 30 performs amplification processing at a set amplification factor as signal processing on an input audio signal. Other signal processing, for example, equalization processing of a set frequency characteristic, filter processing, or the like may be performed, and a plurality of these processings may be performed. In this case, each operation unit 305 may have an operator for setting parameters necessary for performing these signal processes. In this setting, it is possible to set not to perform signal processing. When this setting is made, each signal processing unit 306 and signal processing unit 306-6 receives the input audio signal. Is output as is.

<Modification 2>
The connector A10 in the above-described embodiment may be a connector A10a further provided with the function of the identification information superimposing device 60. The connector A10a will be described with reference to FIGS. FIG. 8 is a view showing the appearance of the connector A10a. FIG. 7 is a block diagram showing the configuration of the connector A10a.

  First, the appearance of the connector A10a will be described. The connector A10a is an input terminal 102-1, 102-2, 102-3, 102-4, 102-5 to which an audio signal is input, to which a cable is connected (hereinafter referred to as the input terminal 102 if not distinguished from each other). And a multi-cable 15 for transmitting an audio signal in which watermark information indicating identification information is superimposed on the audio signal input to each input terminal to the connector B20. In addition, the display units 101-1, 101-2, 101-3, and 101 display the content of the identification information indicated by the watermark information to be superimposed on the audio signal input to each input terminal corresponding to each input terminal. -4, 101-5 (hereinafter referred to as the display unit 101 when not distinguished from each other) and the operation unit 105.

  Next, the configuration of the connector A10a will be described. The operation unit 105 includes an operator for determining the content of identification information to be superimposed as watermark information for each audio signal input to each input terminal 102, and is determined by a user operation. A signal indicating the content of identification information corresponding to each audio signal input to each input terminal 102 is output to the control unit 108. In this example, one content is selected from a plurality of candidate contents as identification information. However, it may be determined by inputting characters as the contents of identification information.

  The storage unit 109 is a storage unit such as a non-volatile memory, and stores contents that are candidates for the identification information described above. The control unit 108 reads out the identification information of the content corresponding to the signal input from the operation unit 105 from the storage unit 109 corresponding to each input terminal 102, and the content of the read identification information corresponds to each input terminal 102. And the superimposing units 106-1, 106-2, 106-3, 106-4, and 106-5 corresponding to the input terminals 102 (hereinafter, superimposing if not distinguished from each other). Content of the identification information is set.

  Each superimposing unit 106 superimposes the watermark information indicating the identification information set in the control unit 108 on the audio signal input to each input terminal 102 and outputs it. In this way, the connector A10a superimposes and outputs watermark information indicating identification information on the audio signal input to each input terminal 102. In this example, the connector A 10a has identification information “keyboard”, “keyboard” for the audio signals input to the input terminals 102-1, 102-2, 102-3, 102-4, and 102-5, respectively. "Mike", "bass", "drum", and "guitar" are superimposed and output as watermark information.

  In this way, it is not necessary to superimpose watermark information indicating identification information in advance on the audio signal input to the input terminal 102 of the connector A 10a, and general-purpose instruments can be used.

  Moreover, such connector A10a can also have another function. As an example, each superimposing unit 106 superimposes watermark information so that the watermark information superimposed on each audio signal does not interfere with each other even if the audio signals output from each superimposing unit 106 are added and synthesized, for example, frequency You may make it superimpose by varying a band. In this case, it is desirable to set in advance a superposition method in connector A10a so that watermark information can be extracted in connector B20 and mixer 30.

  Since the connection relationship between the connector A10a and the connector B20 is determined in advance, for example, if the superimposing method in the superimposing unit 106-1 is set in the extracting unit 203-1, the watermark information can be extracted. Further, the connection relationship between the connector A10a and the mixer 30 is not necessarily determined. For example, in each of the extraction units 303-1, 303-2,..., 303-5, watermark information corresponding to all the superimposing methods is provided. Can be extracted.

  In this way, since the watermark information superimposed on each audio signal before synthesis remains in the audio signal St output from the mixer 30, if the watermark information is extracted from the audio signal St and the identification information is recognized, It is also possible to specify musical instruments that are output sources of audio signals before the synthesis of the audio signal St.

  As another example, when the watermark information is superimposed on the audio signal input to the input terminal 102 as in the embodiment, watermark information indicating further identification information is superimposed. For example, information indicating identification information such as a channel number indicating the input terminal 102 to which the audio signal is input may be superimposed. In this way, the output audio signal is a signal on which watermark information indicating a plurality of identification information is superimposed.

<Modification 3>
In the above-described embodiment, the mixer 30 only extracts the watermark information superimposed on each audio signal. However, since the watermark information is used in the synthesized audio signal St, the watermark information before the synthesis is used. The watermark information superimposed on each audio signal may be temporarily removed and re-superimposed on the audio signal St. In this case, the mixer 30 may be a mixer 30a configured as shown in FIG. FIG. 10 is a block diagram in which the configuration on the path where the audio signal input from the input terminal 302-1 is processed is extracted from the configuration of the mixer 30a.

  As illustrated in FIG. 10, the extraction unit 303a-1 extracts watermark information superimposed on the input audio signal, outputs identification information indicated by the extracted watermark information to the display control unit 304-1, It outputs also to the re-superimposition part 311a-6. The removal unit 310-1 is provided between the input terminal 302-1 and the signal path of the signal processing unit 306-1 and removes watermark information superimposed on the input audio signal.

  The re-superimposition unit 311a-6 receives identification information from the extraction units 303a-1, 303a-2,..., 303a-5 corresponding to the input terminals 302. Then, the re-superimposing unit 311a-6 superimposes watermark information indicating the contents of all the input identification information on the audio signal St output from the signal processing unit 306-6, and outputs it to the output terminal 302. Supply to -6. Since other configurations are the same as those of the mixer 30 in the embodiment, description thereof is omitted. In this way, watermark information indicating musical instruments indicating the output source of each audio signal before synthesis can be superimposed on the audio signal St after synthesis.

  Note that, when the watermark information is unnecessary for the synthesized audio signal St, the re-superimposing unit 311a-6 is not necessary. In this case, since the watermark information is removed from the audio signal by the removing unit 310-1, the sound quality of the audio signal can be improved. The removal unit 310-1 may be provided between the signal processing unit 306-1 and the signal path from the addition unit 307. However, the signal processing unit 306-1 is prior to signal processing in the signal processing unit 306-1. Therefore, the watermark information can be efficiently removed.

<Modification 4>
In the above-described embodiment, the mixer 30 only extracts the watermark information superimposed on each audio signal, but the watermark information superimposed on each audio signal input to each input terminal 302 is extracted. It may be removed once and re-superimposed after signal processing. In this case, the mixer 30 may be a mixer 30b configured as shown in FIG. FIG. 11 is a block diagram in which the configuration on the path where the audio signal input from the input terminal 302-1 is processed is extracted from the configuration of the mixer 30b.

  As illustrated in FIG. 11, the extraction unit 303b-1 extracts watermark information superimposed on the input audio signal, outputs identification information indicated by the extracted watermark information to the display control unit 304-1, It outputs also to the re-superimposition part 311b-1. The removal unit 310-1 is provided between the input terminal 302-1 and the signal path of the signal processing unit 306b-1, and removes the watermark information superimposed on the input audio signal.

  The re-superimposing unit 311b-1 superimposes the watermark information indicating the identification information input from the extracting unit 303b-1 on the audio signal output from the signal processing unit 306b-1. At this time, the re-superimposing unit 311b-1 adds and synthesizes the audio signals output from the other re-superimposing units 311b-2, 311b-3, 311b-4, and 311b-5 as shown in the second modification. However, the watermark information is superimposed so that the watermark information superimposed on each audio signal does not interfere with each other, and in the other re-superimposition units 311b-2, 311b-3, 311b-4, 311b-5, The watermark information is superimposed so that the watermark information does not interfere with each other. The re-superimposing unit 311b-1 acquires information such as the content of signal processing in the signal processing unit 306b-1, such as amplification factor, volume level, and added acoustic effect (reverb etc.), and identifies the content as identification information. In addition to that.

  Since other configurations are the same as those of the mixer 30 in the embodiment, description thereof is omitted. In this way, watermark information indicating musical instruments indicating the output source of each audio signal before synthesis can be superimposed on the audio signal St after synthesis.

<Modification 5>
In the embodiment described above, the mixer 30 designates the volume level of each audio signal by operating the operator of the operation unit 305. However, according to the content of the identification information indicated by the watermark information superimposed on the audio signal. The signal processing content such as the volume level may be designated. In this case, the mixer 30 may be a mixer 30c configured as shown in FIG. FIG. 12 is a block diagram in which the configuration on the path where the audio signal input from the input terminal 302-1 is processed is extracted from the configuration of the mixer 30c.

  As illustrated in FIG. 12, the extraction unit 303c-1 extracts watermark information superimposed on the input audio signal, outputs identification information indicated by the extracted watermark information to the display control unit 304-1, Also output to the control unit 308. The storage unit 309 is a storage unit such as a non-volatile memory, and is a table that associates the contents of identification information (such as “keyboard” and “microphone”) with the contents of signal processing (volume level) in the signal processing unit 306. Is remembered.

  The operation unit 305c-1 is configured such that the operator of the operation unit 305-1 in the embodiment moves under the control of the control unit 308. That is, the volume level is designated not only by the user's operation but also by the control of the control unit 308.

  The control unit 308 reads the volume level, which is the content of the signal processing corresponding to the content of the identification information input from the extraction unit 303c-1, from the storage unit 309, and designates the read volume level so as to specify the read volume level. The operation element in 1 is moved. Similarly, the control unit 308 reads the volume levels corresponding to the contents of the identification information input from the extraction units 303c-2, 303c-3, 303c-4, and 303c-5 from the storage unit 309, and respectively reads them. The operation elements in the operation units 305c-2, 305c-3, 305c-4, and 305c-5 are moved so as to designate the volume level.

  In addition, the control unit 308 identifies identification information input from the extraction units 303c-1, 303c-2, 303c-3, 303c-4, and 303c-5 (hereinafter referred to as the extraction unit 303c when not distinguished from each other). The operator of the operation unit 305c-6 may be moved so as to designate a volume level corresponding to the combination. In this case, a table in which the combination of identification information and the content of signal processing are associated with each other may be stored in the storage unit 309, and the control unit 308 operates the operation unit 305c-6 according to this correspondence. Move the child.

  Here, the control by the control unit 308 may be performed when identification information is first input from each extraction unit 303c or when an operation unit (not shown) is operated. In this way, the position of the operation element moved by the control unit 308 is used as an initial setting, and thereafter the instructed volume level can be changed by the user's operation. Since other configurations are the same as those of the mixer 30 in the embodiment, description thereof is omitted.

  Further, the control unit 308 may directly control the contents of the signal processing of the signal processing unit 306-1 instead of moving the operator of the operation unit 305c-1. In this case, the table in the storage unit 309 is not the volume level but the amplification factor. The signal processing unit 306-1 may handle the volume level instruction by the operation unit of the operation unit 305c-1 as invalid, or may handle it as an instruction to relatively change the amplification factor.

  As shown in the first modification, when performing signal processing other than amplification processing according to the volume level, for example, equalizing processing, for the signal processing unit 306, the table of the storage unit 309 includes identification information and equalizing information. What is necessary is just to make it correspond with the parameter which shows a frequency characteristic. The signal processing according to the identification information may change with the passage of time. In this case, the table in the storage unit 309 may be a table in which identification information is associated with sequence data indicating changes in signal processing content. The start timing of the sequence data may be set to a timing at which the start is instructed by operating an operating means (not shown). In this manner, signal processing corresponding to the identification information indicated by the watermark information superimposed on the input audio signal can be performed on the audio signal. In this case, the display unit 301 may be omitted.

<Modification 6>
In the embodiment described above, the power amplifier 40 amplifies the audio signal St input from the mixer 30. However, the power amplifier 40 is provided with a display unit, and as shown in the second and third modifications, the audio signal St is watermarked. When information is superimposed, an extraction unit that extracts the watermark information and a display control unit that displays identification information indicated by the extracted watermark information on the display unit may be provided.

<Modification 7>
In the embodiment described above, a plurality of the display units 301 of the mixer 30 are provided. However, the display area may be divided into a plurality of displays as one display unit. For example, a mixer 30d having an appearance as shown in FIG. 13 may be used. The mixer 30d has a display unit 3010d, and displays the display areas in 301d-1, 301d-2, ..., 301d-5. In this case, a display control unit for controlling the display content of the display unit 3010d is provided, and this display control unit is responsive to the identification information output from the extraction units 303-1, 303-2, ..., 303-5. The display contents of the display areas 301d-1, 301d-2,..., 301d-5 may be controlled to display the contents of the corresponding identification information.

  As another aspect, it is good also as the mixer 30e of the external appearance as shown in FIG. The mixer 30e has a display unit 3010e and displays it in association with the input channel. Here, the input channels Ch1, 2,..., 5 correspond to the input terminals 302-1, 302-2,. In this case, a display control unit for controlling the display content of the display unit 3010e is provided, and this display control unit is the content of the identification information output from the extraction units 303-1, 303-2, ..., 303-5. And the respective channels may be associated with each other and displayed on the display unit 3010e.

  Thus, any display mode may be used as long as identification information is displayed corresponding to each input terminal 302. The same applies to the display unit 201 of the connector B20.

<Modification 8>
In the above-described embodiment, the display unit 301 of the mixer 30 displays the content of the identification information. However, any display can be used as long as it corresponds to the content of the identification information. Good. In this case, a storage unit that stores a table that associates the content of the identification information with the display content is provided. For example, the display control unit 304-1 that controls the display content of the display unit 301-1 includes the extraction unit 303-1. What is necessary is just to read the display content corresponding to the input identification information from a memory | storage part, and to display the display part 301-1 with the read display content. The same applies to the display unit 201 of the connector B20.

<Modification 9>
In the above-described embodiment, the watermark information superimposed on the audio signal may be constantly superimposed, or may be periodically superimposed. Further, in each device having a superimposing function, superimposing may be performed when an instruction for superimposing is given by operating the operation unit or the like.

<Modification 10>
In the embodiment described above, the identification information superimposing device 60 may be a stereo-compatible identification information superimposing device 60a as shown in FIG. In this case, instead of the input terminal 602-1 and the output terminal 602-2, the Lch input terminal 602-1L, the Rch input terminal 602-1R, the Lch output terminal 602-2L, and the Rch output terminal 602-2R. May be provided.

  The configuration of the identification information superimposing device 60a will be described with reference to FIG. The superimposing unit 606a provides a watermark indicating the identification information “keyboard Lch” obtained by adding “Lch” to the identification information “keyboard” set in the control unit 608 for the audio signal input from the Lch input terminal 602-1L. The information is superimposed and output to the Lch output terminal 602-2L. On the other hand, the superimposing unit 606a adds the identification information “keyboard Rch” obtained by adding “Rch” to the identification information “keyboard” set in the control unit 608 to the audio signal input from the Rch input terminal 602-1R. The watermark information shown is superimposed and output to the Rch output terminal 602-2R. Other configurations are the same as those of the identification information superimposing device 60 in the embodiment, and thus the description thereof is omitted.

  Accordingly, when a musical instrument, for example, the keyboard 110 is compatible with stereo 2ch and does not have a function of superimposing watermark information on an output audio signal, a plurality of identification information superimposing devices 60 are used. Even if the watermark information is not superimposed on each of the audio signals of Lch, Lch, and Rch, the watermark information can be superimposed by such an identification information superimposing device 60a alone.

It is a block diagram which shows the structure of the PA system which concerns on embodiment. 1 is an external view of an identification information superimposing apparatus according to an embodiment. It is a block diagram which shows the structure of the identification information superimposition apparatus which concerns on embodiment. It is an external view of the connector B which concerns on embodiment. It is a block diagram which shows the structure of the connector B which concerns on embodiment. It is an external view of the mixer which concerns on embodiment. It is a block diagram which shows the structure of the mixer which concerns on embodiment. 14 is an external view of a connector A according to Modification 2. FIG. FIG. 10 is a block diagram showing a configuration of a connector A according to Modification 2. FIG. 10 is a block diagram illustrating a configuration of a mixer according to Modification 3. FIG. 10 is a block diagram illustrating a configuration of a mixer according to Modification 4. FIG. 10 is a block diagram illustrating a configuration of a mixer according to Modification Example 5. 14 is an external view of a mixer according to Modification 7. FIG. 14 is an external view of a mixer according to Modification 7. FIG. It is an external view of the identification information Chengyang device according to Modification 10. It is a block diagram which shows the structure of the identification information deuterium apparatus which concerns on the modification 10. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... PA system 10, 10a ... Connector A, 101-1, 101-2, ..., 101-5 ... Display part, 102-1, 102-2, ..., 102-5 ... Input terminal, 105 ... operation unit, 106-1, 106-2, ..., 106-5 ... superposition unit, 108 ... control unit, 109 ... storage unit, 15 ... multi-cable, 20 ... connector B, 201-1, 201- 2,..., 201-5... Display unit, 202-1, 202-2,..., 202-5 .. output terminal, 203-1, 203-2,. , 204-1, 204-2,..., 204-5 ... display control unit, 30, 30a, 30b, 30c, 30d, 30e ... mixer, 301-1, 301-2, ..., 301-5. , 301d-1, 301d-2, ..., 301d-5, 3010d, 3 10e: display unit, 302-1, 302-2, ..., 302-5 ... input terminal, 302-6: output terminal, 303-1, 303-2, ..., 303-5, 303a-1. , 303b-1, 303c-1... Extraction unit, 304-1, 304-2,..., 304-5 ... display control unit, 305-1, 305-2,. 1,305c-6 ... operation unit, 306-1, 306-2, ..., 306-6, 306b-1 ... signal processing unit, 307 ... addition unit, 308 ... control unit, 309 ... storage unit, 311a- 6 ... re-superimposition unit, 40 ... power amplifier, 50 ... speaker, 60, 60-1, 60-2, 60a ... identification information superimposing device, 601 ... display unit, 602-1 ... input terminal, 602-1L ... for Lch Input terminal, 602-1R ... Rch input terminal, 602-2 Output terminal, 602-2L ... Lch output terminal, 602-2R ... Rch output terminal, 605 ... Operation part, 606,606a ... Superimposition part, 608 ... Control part, 609 ... Storage part, 110 ... Keyboard, 120 ... Microphone , 130 ... drum, 140 ... guitar, 150 ... bass

Claims (11)

A plurality of input receiving means for inputting audio signals on which watermark information indicating identification information is superimposed;
Extracting means for extracting identification information from each of the audio signals input to the plurality of input receiving means;
Display means for performing display according to the identification information extracted by the extraction means in response to the input receiving means to which the audio signal from which the identification information is extracted is input ;
Signal processing means for applying a preset signal processing to the audio signal input to the input receiving means;
An audio signal processing apparatus comprising: removal means for removing watermark information superimposed on each audio signal . Before SL signal processing means, said signal processing according to the identification information extracted by the extraction means, the audio signal processing according to claim 1, characterized in that subjecting the audio signal to which the identification information is extracted apparatus. Audio signal watermark information is superimposed showing the identification information, and a plurality of input receiving means, each input,
Extracting means for extracting identification information from each of the audio signals input to the plurality of input receiving means;
Signal processing means for performing signal processing corresponding to the identification information extracted by the extraction means on the audio signal from which the identification information is extracted ,
An audio signal processing apparatus comprising: removal means for removing watermark information superimposed on each audio signal . Before SL signal processing means, the audio signal processing apparatus according to any one of claims 1 to 3, characterized in that outputs each audio signal subjected to the signal processing synthesizes. The audio signal in which the watermark information is removed by the pre-Symbol removing means, the audio signal according to any one of claims 1 to 4, characterized in that the re-superimposition unit further comprising superimposing the watermark information Processing equipment. Before SL signal processing means performs signal processing on an audio signal in which the watermark information has been removed by said removing means,
The audio signal processing apparatus according to claim 5 , wherein the re-superimposing unit superimposes the watermark information on the audio signal signal-processed by the signal processing unit. An audio signal processing apparatus according to any one of 請 Motomeko 1 to claim 6,
An identification information superimposing device comprising identification information superimposing means for superimposing and outputting watermark information indicating identification information on the supplied audio signal;
An audio signal processing system comprising: a transmission unit that transmits the audio signal output by the identification information superimposing unit and inputs the audio signal to the input receiving unit. Before SL identification information superimposition device,
Each of the supplied audio signals is input, further comprising a plurality of input terminals provided corresponding to each of the input receiving means,
The identification information superimposing means prevents the watermark information superimposed on the audio signals from interfering with each other when the audio signals that are input to the input terminals and output with the watermark information superimposed are combined. The audio signal processing system according to claim 7 , wherein watermark information is superimposed on each audio signal input to each input terminal. Before SL identification information superimposition device,
Each of the supplied audio signals is input, and a plurality of input terminals provided corresponding to each of the input receiving means,
And setting means for setting identification information corresponding to each of the input terminals,
The watermark information identification information superimposing means for superimposing, to the supplied audio signal, according to claim 7 or the audio signal is characterized by indicating the identification information set in response to the input terminals supplied The audio signal processing system according to claim 8 . Audio signal watermark information is superimposed showing the identification information, an input receiving step that is input to each of the plurality of input receiving means,
An extraction process for extracting identification information from each of the audio signals input to the plurality of input receiving means;
A display process in accordance with the input receiving means to which the audio signal from which the identification information is extracted is displayed according to the identification information extracted in the extraction process ;
A signal processing step of performing a preset signal processing and outputting the audio signal input in the input reception step;
An audio signal processing method comprising: a removal step of removing watermark information superimposed on each audio signal . Audio signal watermark information is superimposed showing the identification information, an input receiving step that is input to each of the plurality of input receiving means,
An extraction process for extracting identification information from each of the audio signals input to the plurality of input receiving means;
A signal processing step of performing signal processing corresponding to the identification information extracted in the extraction step and outputting the audio signal from which the identification information is extracted ;
An audio signal processing method comprising: a removal step of removing watermark information superimposed on each audio signal .

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