JP5463993B2 - Acoustic signal processing device - Google Patents

Description

  The present invention relates to an acoustic signal processing apparatus capable of easily transferring coefficients from a control unit to an acoustic signal processing unit.

  A conventional acoustic signal processing device includes a control unit that controls the overall operation of the acoustic signal processing device (hereinafter referred to as “CPU (Central Processing Unit)”), and a signal processing unit that executes acoustic signal processing according to a microprogram. (Hereinafter referred to as “DSP (Digital Signal Processor)”). In the acoustic signal processing device, a plurality of types of components having different acoustic signal processing functions are prepared as plug-ins, and DSP resources are allocated to each plug-in so that the acoustic signal processing related to each plug-in is executed. A microprogram is generated. By causing the DSP to perform acoustic signal processing according to the microprogram, plug-in acoustic signal processing can be performed. Here, in the case of a plug-in for which coefficient setting is performed, coefficient calculation is performed in the plug-in on the CPU side, and the calculated coefficient is written in a memory area secured in the RAM on the CPU side. The coefficient is set to the DSP by performing coefficient transfer for transferring the coefficient from the memory area to the DSP.

For example, FIGS. 14 and 15 show an example in which the plug-in is an equalizer and the coefficient of the equalizer is transferred. FIG. 14 is a diagram showing an outline of coefficient transfer, and FIG. 15 is a diagram showing the relationship between the coefficient calculation unit memory A on the CPU side and the signal processing unit memory B of the DSP 120.
Coefficients are calculated by the plug-in 110 on the CPU side, and the calculated coefficients are written in the coefficient calculation unit memory A secured in the RAM or the like on the CPU side. In the illustrated example, the coefficient Coef.0 is in the first line La1 of the coefficient calculation unit memory A, the coefficient Coef.1 is in the second line La2, the coefficient Coef.2 is in the third line La3, and the coefficient is in the fourth line La4. Coef.3 is written in coefficient Coef.4 in the fifth row La5. These coefficients Coef.0 to Coef.4 are transferred to the DSP 120 side and written into the signal processing unit memory B on the DSP 120 side so that the acoustic signal processing of the DSP 120 can be optimized. In the illustrated example, the coefficient Coef.0 is in the first line Lb1 of the signal processing unit memory B, the coefficient Coef.1 is in the eighth line Lb8, the coefficient Coef.2 is in the seventh line Lb7, and the coefficient is in the ninth line Lb9. Coef.3 is written in the fifth line Lb5 with the coefficient Coef.4. As described above, when the coefficient is transferred from the coefficient calculation unit memory A to the DSP 120, the coefficient Coef.0 of the first row La1 of the coefficient calculation unit memory A is set to the first row Lb1 of the signal processing unit memory B. The coefficient Coef.1 of the line La2 is set to the eighth line Lb8, the coefficient Coef.2 of the third line La3 is set to the seventh line Lb7, and the coefficient Coef.3 of the fourth line La4 is set to the ninth line La9. The CPU issues a transfer command for writing the coefficient Coef.4 of La5 into the fifth line Lb5.

  In the conventional acoustic signal processing device, the location of the coefficient written in the signal processing unit memory B on the DSP 120 side is changed during the development in which the DSP that performs the acoustic signal processing is trying to optimize or the like. The value is changed. For example, when the location of the coefficient written to the signal processing unit memory B is changed as shown in FIG. 16, the coefficient Coef.0 of the first row La1 of the coefficient calculation unit memory A is set to 2 rows of the signal processing unit memory B. In the second line Lab, the coefficient Coef.1 of the second line La2 is set to the sixth line Lb6, the coefficient Coef.2 of the third line La3 is set to the seventh line Lb7, and the coefficient Coef.3 of the fourth line La4 is set to the ninth line La9. In addition, the CPU issues a transfer command for writing the coefficient Coef.4 of the fifth line La5 to the eighth line Lb8. That is, it has been necessary to rewrite the code so that a transfer instruction is written in which the coefficient is written in the changed location of the signal processing unit memory B. In this case, the location of the coefficient written in the signal processing unit memory B on the DSP 120 side is frequently changed during an optimization trial, and is changed every time the transfer destination is changed. The code of the transfer instruction must be corrected so that the coefficient is transferred to the transfer destination. For this reason, there has been a problem that the work for correcting the code of the transfer instruction must be frequently performed and the correction work takes a lot of time.

  Therefore, the present invention has an object to provide an acoustic signal processing device capable of easily performing work associated with a change even if the location of the coefficient written in the signal processor memory on the signal processor side is frequently changed. It is said.

  In order to achieve the above object, the present invention provides a control unit that controls the overall operation, a signal processing unit that executes signal processing, and a plug that performs acoustic signal processing by allocating resources of the signal processing unit. A coefficient calculation unit memory in which a plurality of coefficients calculated in the plug-in are written, and a signal processing unit side to which a plurality of coefficients from the coefficient calculation unit memory are transferred Signal processing unit memory, and for each coefficient in the plurality of coefficients, a coefficient transfer destination table in which transfer destination offset information that is offset information of a place to be written in the signal processing unit memory is defined for each coefficient And the control unit transfers the coefficient in the plurality of coefficients from the coefficient calculation unit memory to the signal processing unit memory. Above with reference to the transfer destination offset information, and the most important feature that the has to write the signal processing unit the respective coefficients to a memory location corresponding to the transfer destination offset information for each coefficient in.

  According to the present invention, when each coefficient in a plurality of coefficients is transferred to the signal processing unit memory, the location of the signal processing unit memory indicated by the transfer destination offset information is referred to by referring to the transfer destination offset information in the coefficient transfer destination table. Since each coefficient is written to the signal processing section, even if the location of the coefficient written in the signal processing section memory on the signal processing section side is frequently changed, it is possible to cope by changing the transfer destination offset information. . Accordingly, since it is not necessary to modify the code of the transfer instruction, even if the location of the coefficient written in the signal processing unit memory on the signal processing side is frequently changed, the work associated with the change can be easily performed. .

It is a block diagram which shows the structure of the acoustic signal processing apparatus concerning the Example of this invention. It is a figure which shows the equivalent hardware constitutions of the acoustic signal processing apparatus concerning this invention. It is a figure which shows the outline | summary transferred to the signal processing part memory of DSP from the coefficient calculation part memory by the side of CPU in the acoustic signal processing apparatus of this invention. It is a figure which shows the relationship between the coefficient calculation part memory in the acoustic signal processing apparatus of this invention, a signal processing part memory, and a coefficient transfer destination table. It is a figure which shows the aspect which transfers a coefficient from a coefficient calculation part memory to a signal processing part memory using the coefficient transfer destination table in the acoustic signal processing apparatus of this invention. In the acoustic signal processing apparatus of this invention, it is a figure which shows the structure of the coefficient calculation part memory in the other aspect which transfers a coefficient from a coefficient calculation part memory to a signal processing part memory using a coefficient transfer destination table. In the acoustic signal processing apparatus of this invention, it is a figure which shows the structure of the coefficient transfer destination table in the further another aspect which transfers a coefficient from a coefficient calculation part memory to a signal processing part memory using a coefficient transfer destination table. In the acoustic signal processing apparatus of this invention, it is a figure which shows the structure of the coefficient calculation part memory and coefficient transfer destination table in the further another aspect which transfers a coefficient from a coefficient calculation part memory to a signal processing part memory using a coefficient transfer destination table. is there. In the acoustic signal processing apparatus of this invention, it is a figure which shows the further another aspect which transfers a coefficient from a coefficient calculation part memory to a signal processing part memory using a coefficient transfer destination table. It is a flowchart of the coefficient transfer process 1 performed with the acoustic signal processing apparatus concerning this invention. It is a flowchart of the coefficient transfer process 2 performed with the acoustic signal processing apparatus concerning this invention. It is a flowchart of the coefficient transfer process 3 performed with the acoustic signal processing apparatus concerning this invention. It is a flowchart of the coefficient transfer process 4 performed with the acoustic signal processing apparatus concerning this invention. It is a figure which shows the outline | summary transferred to the signal processing part memory of DSP from the coefficient calculation part memory by the side of CPU in the conventional acoustic signal processing apparatus. It is a figure which shows the relationship between the coefficient calculation part memory and signal processing part memory in the conventional acoustic signal processing apparatus. It is a figure which shows the signal processing part memory from which the place which writes a coefficient in the conventional acoustic signal processing apparatus was changed.

FIG. 1 is a block diagram showing a configuration of an acoustic signal processing apparatus 1 according to an embodiment of the present invention.
In the acoustic signal processing device 1, a central processing unit (CPU) 10 executes a management program (OS: Operating System), and the overall operation of the acoustic signal processing device 1 is controlled on the OS. The acoustic signal processing apparatus 1 includes a nonvolatile ROM (Read Only Member) 11 in which operation software such as a control program executed by the CPU 10 is stored, and a RAM (Random Access) in which the work area of the CPU 10 and various data are stored. Memory) 12 is provided. By executing a control program, the CPU 10 performs acoustic signal processing on a plurality of input acoustic signals by a DSP (Digital Signal Processor: Digital Signal Processor) 19 to perform mixing processing. Note that by making the ROM 11 a rewritable ROM such as a flash memory, the operation software can be rewritten, and the version of the operation software can be easily upgraded. The DSP 20 adjusts and mixes the volume level and frequency characteristics of the input acoustic signal based on the set parameters under the control of the CPU 10, and controls the acoustic characteristics such as volume, pan, and effect based on the parameters. Sound signal processing is performed. The effector (EFX) 19 adds effects such as reverb, echo, chorus and the like to the mixed audio signal under the control of the CPU 10.

  The display IF 13 is a display interface that displays various screens related to acoustic signal processing on the display unit 14 such as a liquid crystal display. The detection IF 15 scans the operation elements 16 such as faders, knobs, and switches provided on the panel of the acoustic signal processing device 1 to detect operations on the operation elements 16, and based on the detected operation signals. It is possible to edit and operate parameters used for acoustic signal processing. The communication IF 17 is a communication interface for communicating with an external device via the communication I / O 18, and is a network interface such as Ethernet (registered trademark). The CPU 10, ROM 11, RAM 12, display IF 13, detection IF 15, communication IF 17, EFX 19, DSP 20 exchange data and the like via the communication bus 21.

  The EFX 19 and the DSP 20 exchange data with the AD 22, DA 23, and DD 24 via the audio bus 25. The AD 22 is a plurality of analog input ports that input analog signals to the acoustic signal processing apparatus 1. The analog input signals input in the AD 22 are converted into digital signals and sent to the audio bus 25. The DA 23 is a plurality of analog output ports for outputting the mixed signal mixed from the acoustic signal processing device 1 to the outside. The digital output signal received via the audio bus 25 in the DA 23 is converted into an analog signal, Output from a speaker placed on the stage. The DD 24 is a plurality of digital input / output ports for inputting a digital signal to the acoustic signal processing apparatus 1 and outputting a digital signal mixed to the outside. The digital input signal input at the DD 24 is sent to the audio bus 25. The digital output signal received via the audio bus 25 is output to a digital recorder or the like. The digital signal sent from the AD 22 and DD 24 to the audio bus 25 is received by the DSP 20 and subjected to the above-described digital signal processing. The DA 23 or DD 24 receives the mixed digital signal sent from the DSP 20 to the audio bus 25.

Next, FIG. 2 is a block diagram showing an equivalent hardware configuration of the acoustic signal processing apparatus 1 according to the embodiment of the present invention.
In FIG. 2, a plurality of analog signals input to a plurality of analog input ports (AD 22) are converted into digital signals and input to an input patch 30. The plurality of digital signals input to the plurality of digital input ports (DD24) are input to the input patch 30 as they are. In the input patch 30, any one input port of a plurality of input ports that are signal input sources is set to each input channel (N is an integer greater than or equal to 1; for example, 96 channels) of the input channel unit 31. Input channels) 31-1, 31-2, 31-3,..., 31-N are selectively patched (connected). The audio signals In.1, In.2, In.3,..., In.N from the input ports patched by the input patch 30 are supplied to the input channels 31-1 to 31-N, respectively. . In each of the input channels 31-1 to 31-N, the acoustic characteristics and the like of the acoustic signals In.1, In.2, In.3,. That is, the input channel signals input to the input channels 31-1 to 31-N in the input channel section 31 are adjusted for the characteristics of the acoustic signal by an equalizer or a compressor for each input channel and the delivery level is controlled. The signals are sent to M (Mix Bus) 35 (M is an integer of 1 or more) and L, R stereo cue buses (Cue Bus) 36. In this case, the N input channel signals output from the input channel unit 31 are selectively output to one or more of the M mixing buses 35.

  In the mixed bus 35, one or a plurality of input channel signals selectively input from any input channel among the N input channels are mixed in each of the M buses, and a total of M mixed outputs are output. Is done. The mixed outputs from each of the M mixing buses 35 are output channels (Output Channels) 32-1, 32-2, 32-3,. -M is output respectively. In each of the output channels 32-1 to 32-M, the characteristics of the acoustic signal such as the frequency balance are adjusted by an equalizer or a compressor, and the output channel signals Mix.1, Mix.2, Mix.3,. The M output channel signals Mix.1 to Mix.M are output to an output patch 34. In the L and R cue bus 36, there is a cue / monitor signal in which one or a plurality of input channel signals selectively inputted from any of the N input channels are mixed. The data is output to a cue / monitor unit (Cue / Monitor) 33. The cue / monitor output (Cue / monitor) in which the characteristics of the acoustic signal such as frequency balance are adjusted by the equalizer or compressor in the cue / monitor unit 33 is output to the output patch 34.

  In the output patch 34, any one of the M output channel signals Mix.1 to Mix.M from the output channel section 32 and the cue / monitor output from the cue / monitor section 33 is selectively selected as one of a plurality of output ports. The output channel signal patched by the output patch 34 is supplied to each output port. At the output port, the digital output channel signal is converted into an analog output signal, amplified by an amplifier, and emitted from a plurality of speakers arranged in the venue. Further, this analog output signal is supplied to an in-ear monitor worn by a musician or the like on the stage or reproduced by a stage monitor speaker placed in the vicinity thereof. The digital acoustic signal output from the output patch 34 is supplied to a recorder, an externally connected DAT, or the like so that it can be digitally recorded. Further, the cue / monitor output is converted into an analog sound signal at the output port assigned by the output patch 34, and is output from a monitor speaker arranged in the operator room, headphones worn by the operator, or the like and can be listened to by the operator. It becomes like this.

  The DSP 20 is composed of a plurality of DSP chips, and each of the plurality of DSP chips executes acoustic signal processing according to a microprogram so that the acoustic signal processing is executed in the acoustic signal processing device 1 having the configuration shown in FIG. become. In this case, a plurality of types of components having different sound processing functions are prepared as plug-ins, and sound signal processing is performed by combining the plug-ins. The DSP 20 generates a microprogram for executing the acoustic signal processing related to each plug-in by allocating resources to the acoustic signal processing of each combined plug-in. Then, by causing the DSP 20 to execute acoustic signal processing according to the microprogram, the plug-in acoustic signal processing is executed. Here, in the case of a plug-in for which coefficient setting is performed, coefficient calculation is performed in the plug-in on the CPU 10 side, and the calculated coefficient is written into a memory area secured in the RAM 12 or the like on the CPU 10 side. Coefficient transfer to the DSP 20 is performed.

For example, FIG. 3 and FIG. 4 show an example in which the coefficient of the filter used by the plug-in as an equalizer is transferred. FIG. 3 is a diagram showing an outline of coefficient transfer, and FIG. 4 is a diagram showing the relationship between the coefficient calculation unit memory A on the CPU 10 side and the signal processing unit memory B of the DSP 20.
As shown in these drawings, the coefficient calculated by the coefficient calculation in the plug-in 26 on the CPU 10 side is written in the memory area secured as the coefficient calculation unit memory A in the RAM 12. In the illustrated example, the coefficient Coef.0 is in the first line La1 of the coefficient calculation unit memory A, the coefficient Coef.1 is in the second line La2, the coefficient Coef.2 is in the third line La3, and the coefficient is in the fourth line La4. Coef.3 is written in coefficient Coef.4 in the fifth row La5. These coefficients Coef.0 to Coef.4 are written into the signal processing unit memory B on the DSP 20 side so that the acoustic signal processing executed by the DSP 20 can be optimized after being transferred to the DSP 20 side. In the illustrated example, the coefficient Coef.0 is in the first line Lb1 of the signal processing unit memory B, the coefficient Coef.1 is in the eighth line Lb8, the coefficient Coef.2 is in the seventh line Lb7, and the coefficient is in the ninth line Lb9. Coef.3 is written in the fifth line Lb5 with the coefficient Coef.4. In the acoustic signal processing apparatus 1 according to the present invention, when coefficient transfer from the coefficient calculation unit memory A to the DSP 20 is performed, a coefficient transfer destination table C shown in FIG. 4 is created.

  The coefficient transfer destination table C is composed of transfer source offset information, transfer destination offset information, and size information of the coefficients Coef.0 to Coef.4 as shown in FIG. For example, since the coefficient Coef.0 is written in the first row La1 of the coefficient calculation unit memory A of the transfer source, the transfer source offset information is set to “0”, and the first row of the signal processing unit memory B of the transfer destination Since it is written in Lb1, the transfer destination offset information is set to “0”. Also, since the size of the coefficient Coef.0 is 1 word, the size information is “1”. Since the coefficient Coef.1 is written in the second row La2 of the coefficient calculation unit memory A of the transfer source, the transfer source offset information is set to “1”, and is stored in the eighth row Lb8 of the signal processing unit memory B of the transfer destination. Since it is written, the transfer destination offset information is “7” and the size is 1 word, so the size information is “1”. Similarly, the coefficient Coef.2 has the transfer source offset information “2”, the transfer destination offset information “6”, and the size information “1”. In the coefficient Coef.3, the transfer source offset information is “3”, the transfer destination offset information is “8”, and the size information is “1”. In the coefficient Coef.4, the transfer source offset information is “4”, the transfer destination offset information is “4”, and the size information is “1”. In this way, the coefficient transfer destination table C is created.

  Then, when there is a transfer instruction for the coefficients Coef.0 to Coef.4 from the CPU 10, each coefficient Coef.0 read from the coefficient calculation unit memory A is referred to by referring to the coefficient transfer destination table C shown in FIG. -Coef.4 is transferred to the signal processor memory B on the DSP 20 side by coefficient. In this coefficient transfer, a column of transfer destination offset information becomes a de facto “transfer destination table” as shown by a thick frame in FIG. That is, the coefficient Coef.0 read from the first row La1 of the coefficient calculation unit memory A has the referenced transfer destination offset information set to “0”, so the first row Lb1 of the signal processing unit memory B The coefficient is transferred by being written to. Also, the coefficient Coef.1 read from the second line La2 of the coefficient calculation unit memory A has the referenced transfer destination offset information set to “7”, so the eighth line Lb8 of the signal processing unit memory B The coefficient is transferred by being written to. Further, the coefficient Coef.2 read from the third row La3 of the coefficient calculation unit memory A has the reference destination offset information of “3”, so the fourth row Lb4 of the signal processing unit memory B The coefficient is transferred by being written to. Thereafter, the coefficient Coef.3 read out from the fourth row La4 of the coefficient calculation unit memory A in the same manner is written to the ninth row Lb9 of the signal processing unit memory B, and the fifth row La5 of the coefficient calculation unit memory A is written. The coefficient Coef.4 read out from is transferred to the coefficient by being written in the fifth line Lb5 of the signal processing unit memory B. In FIG. 5, the transfer source offset column is omitted.

  In this case, if the DSP 20 that performs acoustic signal processing is in the middle of development and is trying to optimize and the location of the coefficient written in the signal processing unit memory B on the DSP 20 side is changed, the coefficient transfer destination By simply rewriting the transfer destination offset information in the table C according to the location of the changed coefficient, the CPU 10 ensures that the coefficient is not mistaken for the location of the signal processing unit memory B changed when the transfer instruction is issued. Be able to write. As described above, in the acoustic signal processing device 1 according to the present invention, even if the location of the coefficient written in the signal processing unit memory B on the DSP 20 side is frequently changed, the work accompanying the change can be easily performed. become.

Next, in the acoustic signal processing apparatus 1 of the present invention, the configuration of the coefficient calculation unit memory A in another mode in which the coefficient is transferred from the coefficient calculation unit memory A to the signal processing unit memory B using the coefficient transfer destination table C is shown in FIG. It is shown in FIG. In the coefficient calculation unit memory A shown in FIG. 6, the coefficient data previously transferred for the coefficients Coef.0 to Coef.4 is stored in the Old register, and the coefficient data to be transferred this time is stored in the New register. When the plug-in coefficient is recalculated and transferred in the CPU 10, the previous coefficient data stored in the Old register of each coefficient Coef.0 to Coef.4 and the current coefficient stored in the New register are stored. A coefficient having a difference in coefficient data is detected by comparing with the data. In the case shown in the figure, the coefficient data (New) of the coefficient Coef.2 and the coefficient Coef.3 surrounded by a thick frame is different, so that when the CPU 10 issues a transfer instruction of the coefficients Coef.0 to Coef.4. Only coefficient data (New) of coefficient Coef.2 and coefficient Coef.3 is transferred to the signal processing unit memory B. When transferring, the coefficient data (New) of the coefficients Coef.2 and Coef.3 enclosed by the thick frame read from the coefficient calculation unit memory A as described above is referred to the coefficient transfer destination table C. Based on the transfer destination offset information of the coefficient Coef.2 and the coefficient Coef.3, each is written in the signal processing unit memory B. As a result, since the amount of data transferred at one transfer timing can be reduced, it is possible to prevent noise from occurring on the DSP 20 side that receives the coefficient. This is because when one set of parameters, for example, one set of coefficients used for one filter is divided and transferred at multiple times, the result of filtering until all of the one set of coefficients is transferred is This is because they do not match and become noise.
Therefore, since it is necessary to transfer the coefficient set as one set with the same transfer timing as much as possible, if only the coefficient whose coefficient data is different between the previous time and the current time is transferred as in the transfer mode described above. As much as possible, noise will not occur. When transferring, list the coefficients whose coefficient data is different between the previous time and this time, and transfer the listed coefficients together at the same transfer timing as much as possible. To do.

  Next, in the acoustic signal processing apparatus 1 of the present invention, the configuration of the coefficient transfer destination table C in yet another aspect in which the coefficients are transferred from the coefficient calculation unit memory A to the signal processing unit memory B using the coefficient transfer destination table C. As shown in FIG. In the coefficient transfer destination table C shown in FIG. 7, pair number information is added to each coefficient. As pair number information, the same pair number is assigned to the coefficients sent at the same transfer timing. In the example shown in the figure, the coefficient Coef.0, Coef.1, Coef.2, Coef.4, Coef.5, Coef.8, and Coef.9 among the coefficients Coef.0 to Coef.9 are paired with “1”. No. information is assigned, and pair No. information “2” is assigned to the coefficients Coef.3, Coef.6, and Coef.7. Then, when there is a transfer instruction of the coefficients Coef.0 to Coef.9 from the CPU 10, the coefficients Coef.0, Coef.1, Coef.2, Coef.4, Coef.4, to which the same pair number “1” is assigned. Transfer processing is performed so that the seven coefficients of Coef.5, Coef.8, and Coef.9 are transferred at the same transfer timing. In this transfer process, the above seven coefficients are respectively written in the signal processing unit memory B based on the transfer destination offset information surrounded by a thick frame in FIG. Further, transfer processing is performed so that the three coefficients Coef.3, Coef.6, and Coef.7 to which the same pair number “2” is assigned are also transferred at the same transfer timing. Also in this transfer process, the above three coefficients are respectively written in the signal processing unit memory B based on the transfer destination offset information surrounded by a thick frame in FIG. In FIG. 7, the transfer source offset and size columns are omitted.

  Further, when pair No. information is given to each of the coefficients Coef.0 to Coef.9, the coefficients of the same pair No. information may be rearranged in the coefficient transfer destination table C as shown in FIG. Good. In this way, since the size that can be transferred at the same transfer timing is limited, in the coefficient transfer destination table C in which pair numbers are randomly mixed when the number of coefficients increases, all of the same pair number information is stored. Although it is difficult to perform maintenance such as whether the coefficients of the same number can be transferred at the same transfer timing, it is easier to perform maintenance if the coefficients of the same pair number information are arranged. When there is a transfer instruction of coefficients Coef.0 to Coef.9 from the CPU 10, the coefficients Coef.0, Coef.1, and Coef.2 to which the same pair number “1” is assigned as described above. , Coef.4, Coef.5, Coef.8, and Coef.9 are transferred so as to be transferred at the same transfer timing. In this transfer process, the above seven coefficients are respectively written in the signal processing unit memory B based on the transfer destination offset information surrounded by a thick frame in FIG. Further, transfer processing is performed so that the three coefficients Coef.3, Coef.6, and Coef.7 to which the same pair number “2” is assigned are also transferred at the same transfer timing. Also in this transfer process, the above three coefficients are respectively written in the signal processing unit memory B based on the transfer destination offset information surrounded by a thick frame in FIG. In FIG. 8, the transfer source offset and size columns are omitted.

  Next, in the acoustic signal processing apparatus 1 of the present invention, the coefficient is transferred from the coefficient calculation unit memory A to the signal processing unit memory B using the coefficient transfer destination table C, and the coefficient calculation unit memory A and coefficient transfer in yet another mode The configuration of the destination table C is shown in FIG. In the coefficient calculation unit memory A shown in FIG. 8, tag information is inserted before and after the coefficients Coef.0 to Coef.9, and the coefficients in the range between the tag information indicating the start and end are set to the same transfer timing. Have been to forward in. In the example shown in the figure, coefficients Coef.0, Coef.1, Coef.2, Coef.4, Coef.5, Coef.8, and Coef.9 between the first Start TAG and the End TAG surrounded by a thick frame. The three coefficients Coef.3, Coef.6, and Coef.7 are sandwiched between the next Start TAG and End TAG indicated by a thick frame. Then, when there is a transfer instruction of coefficients Coef.0 to Coef.9 from the CPU 10, seven coefficients Coef.0, Coef.1, Coef.2, and Coef.4 between the first Start TAG and End TAG are used. , Coef.5, Coef.8, and Coef.9 are transferred so that they are transferred at the same transfer timing. In this transfer process, the above seven coefficients are written in the signal processing unit memory B based on the transfer destination offset information surrounded by a thick frame in FIG. Also, transfer processing is performed so that the three coefficients Coef.3, Coef.6, and Coef.7 between the next Start TAG and End TAG are also transferred at the same transfer timing. In this transfer process, the above three coefficients are respectively written in the signal processing unit memory B based on the transfer destination offset information surrounded by a thick frame in FIG. In FIG. 9, the transfer source offset and size columns are omitted. In this coefficient transfer mode, pair number information need not be defined in the coefficient transfer destination table C.

Next, FIG. 10 shows a flowchart of coefficient transfer processing 1 executed by the acoustic signal processing apparatus 1 according to the present invention. This coefficient transfer process 1 is a coefficient transfer process in a mode in which coefficients are transferred from the coefficient calculation unit memory A to the signal processing unit memory B using the coefficient transfer destination table C shown in FIG.
The coefficient transfer process 1 shown in FIG. 10 is started when there is a transfer command for transferring the coefficient of the coefficient calculation unit memory A from the CPU 10 to the signal processing unit memory B, and is transferred from the coefficient calculation unit memory A in step S10. Coefficient data of the coefficient is acquired. Subsequently, the coefficient transfer destination table C is acquired in step S11. Then, the coefficient data obtained by referring to the coefficient transfer destination table C is transferred to the DSP 20, and each coefficient is written to the location of the signal processing unit memory B corresponding to the transfer destination offset information of each coefficient in step S12. . When the process of step S12 ends, the coefficient transfer process 1 ends.

Next, FIG. 11 shows a flowchart of coefficient transfer processing 2 executed by the acoustic signal processing apparatus 1 according to the present invention. The coefficient transfer process 2 is configured as the coefficient calculation unit memory A shown in FIG. 6, and uses another coefficient transfer destination table C to transfer the coefficient from the coefficient calculation unit memory A to the signal processing unit memory B. It is a coefficient transfer process.
The coefficient transfer process 2 shown in FIG. 11 is started when there is a transfer instruction from the CPU 10 to transfer the coefficient of the coefficient calculation unit memory A to the signal processing unit memory B. In step S20, the Old register of the coefficient calculation unit memory A is started. The coefficient data transferred last time is acquired, and the coefficient data to be transferred this time stored in the New register of the coefficient calculation unit memory A is acquired in step S21. Next, each coefficient data (Old) transferred last time acquired from the Old register in step S22 is compared with each coefficient data (New) transferred this time acquired from the New register.

  Then, as a result of the comparison in step S22, it is determined for each coefficient whether or not there is a difference between the coefficient data (Old) transferred last time and the coefficient data (New) transferred this time. Here, when it is determined that there is no difference between the coefficient data (Old) transferred last time and the coefficient data (New) transferred this time for each coefficient, the coefficient transfer process 2 ends without transferring the coefficient. If it is determined in step S23 that there is a difference between the coefficient data (Old) transferred last time and the coefficient data (New) transferred this time, the coefficient transfer destination table C is acquired in step S24. Is done. Then, the coefficient data (New) of the coefficient determined to have a difference in step S23 with reference to the coefficient transfer destination table C is transferred to the DSP 20, and the signal processing unit memory corresponding to the transfer destination offset information of each coefficient The data is written to the location B in step S25. When the process of step S25 ends, the coefficient transfer process 2 ends.

Next, FIG. 12 shows a flowchart of the coefficient transfer process 3 executed by the acoustic signal processing apparatus 1 according to the present invention. The coefficient transfer process 3 is configured as the coefficient transfer destination table C shown in FIG. 7 or FIG. 8, and the coefficient transfer destination table C is used to transfer coefficients from the coefficient calculation unit memory A to the signal processing unit memory B. In this aspect, the coefficient transfer process is performed.
The coefficient transfer process 3 shown in FIG. 12 is started when there is a transfer command from the CPU 10 to transfer the coefficient of the coefficient calculation unit memory A to the signal processing unit memory B, and is transferred from the coefficient calculation unit memory A in step S30. Coefficient data of the coefficient is acquired. Next, a coefficient pair to which the same pair number is assigned in the coefficient to be transferred related to the coefficient data acquired in step S31 is searched. Further, the coefficient transfer destination table C is acquired in step S32, and it is determined in step S33 whether or not there is a coefficient to be transferred in pairs as a result of searching in step S31.

  Here, when it is determined that there is no coefficient pair to which the same pair number is assigned in the result searched in step S31, the process branches to step S35 and the coefficient acquired in the normal transfer mode is obtained. Transferred. The normal transfer mode is a coefficient transfer process by the coefficient process 1 shown in FIG. If it is determined in step S33 that there is a coefficient pair to which the same pair number is assigned as a result of the search in step S31, the process branches to step S34 and the same pair number is assigned. The coefficient pair is transferred at the same transfer timing. When the transfer process in step S34 or the transfer process in step S35 ends, the coefficient transfer process 3 ends. The coefficient pair is not limited to a pair consisting of two coefficients, but includes a pair consisting of three or more coefficients.

Next, FIG. 13 shows a flowchart of coefficient transfer processing 4 executed by the acoustic signal processing apparatus 1 according to the present invention. The coefficient transfer process 4 is configured as the coefficient calculation unit memory A shown in FIG. 9, and uses another coefficient transfer destination table C to transfer the coefficient from the coefficient calculation unit memory A to the signal processing unit memory B. It is a coefficient transfer process.
The coefficient transfer process 4 shown in FIG. 13 is started when there is a transfer command from the CPU 10 to transfer the coefficient of the coefficient calculation unit memory A to the signal processing unit memory B, and is transferred from the coefficient calculation unit memory A in step S40. Coefficient data of the coefficient is acquired. Next, in step S41, the coefficient tag in the coefficient calculation unit memory A is searched for before and after or between the coefficients to be transferred. Further, the coefficient transfer destination table C is acquired in step S42, and it is determined in step S43 whether or not there is a coefficient tag in the search result in step S41.

  If it is determined in step S41 that there is no coefficient tag, the process branches to step S45, and the coefficient acquired in the normal transfer mode is transferred. The normal transfer mode is a coefficient transfer process by the coefficient process 1 shown in FIG. If it is determined in step S43 that there is a coefficient tag as a result of the search in step S41, the process branches to step S44 and the coefficient in the range between the tag indicating start and the tag indicating end is inserted. Is transferred at the same transfer timing. When the transfer process in step S44 or the transfer process in step S45 ends, the coefficient transfer process 4 ends.

In the present invention described above, when coefficient pairs having the same pair number are transferred at the same transfer timing, the entire size of the coefficient pair exceeds the size that can be transferred at one transfer timing. In this case, the data is divided and transferred. Therefore, when the same sub-pair number is assigned to the minimum coefficient that should not be divided and transferred, and the coefficient pair must be divided and transferred, the coefficient with the same sub-pair number is assigned. The data may be divided into pairs and transferred at the same transfer timing.
Further, the same pair number may be automatically given without being described in the coefficient transfer destination table. In the case of automatic assignment, the same pair number is assigned to one set of parameters, for example, one set of coefficients used for one filter.

DESCRIPTION OF SYMBOLS 1 Acoustic signal processing apparatus, 10 CPU, 11 ROM, 12 RAM, 13 Display IF, 14 Display part, 15 Detection IF, 16 Operator, 17 Communication IF, 18 Communication I / O, 19 EFX, 20 DSP, 21 Communication bus , 22 AD, 23 DA, 24 DD, 25 audio bus, 26 plug-in, 30 input patch, 31 input channel section, 32 output channel section, 33 monitor section, 34 output patch, 35 mixing bus, 36 cue bus, 110 plug IN, 120 DSP, A coefficient calculation unit memory, B signal processing unit memory, C coefficient transfer destination table

Claims (3)

An acoustic signal processing device comprising: a control unit that controls the overall operation; a signal processing unit that executes signal processing; and a plug-in that performs acoustic signal processing by allocating resources of the signal processing unit,
A coefficient calculator memory in which a plurality of coefficients calculated in the plug-in are written;
A signal processing unit memory on the signal processing unit side to which a plurality of coefficients from the coefficient calculation unit memory are transferred;
For each coefficient in the plurality of coefficients, a coefficient transfer destination table in which transfer destination offset information which is offset information of a place to be written in the signal processing unit memory is defined for each coefficient, and
The control unit refers to the transfer destination offset information in the coefficient transfer destination table when transferring each coefficient in the plurality of coefficients from the coefficient calculation unit memory to the signal processing unit memory. The acoustic signal processing apparatus, wherein each coefficient is written in a location of the signal processing unit memory corresponding to the transfer destination offset information.   The controller, when transferring each coefficient in the plurality of coefficients to the signal processing unit memory, only the coefficient that is different from the previous coefficient data in each coefficient is the signal processing unit. The acoustic signal processing apparatus according to claim 1, wherein the acoustic signal processing apparatus is transferred to a memory.   In the coefficient transfer destination table, the same pair information is given to the coefficients transferred at the same timing, and the control unit transfers the coefficients in the plurality of coefficients to the signal processing unit memory. The acoustic signal processing apparatus according to claim 1, wherein coefficients having the same pair information in a coefficient transfer destination table are transferred at the same timing.

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