JPH07129200A - Sound signal processing device - Google Patents

Abstract

PURPOSE:To provide possibility of flexible response to eventually changed transfer speed of the voice data by accommodating in a memory the managerial information of a ring buffer which temporarily accommodates the transfer data at the time of recording or reproducing, and thereupon controlling the ring buffer. CONSTITUTION:When a voice data transfer control part 9 emits a record start direction in the case of voice recording, a voice data control part 6 transfers the voice data from a voice entry device 3 to a ring buffer 7 and accommodates there on the basis of the managerial information of a buffer managing memory 8. The voice data is read out of the ring buffer 7 and transferred to a file device 5. In the case of voice reproduction, first the voice data transfer control part 9 accommodates the voice data transferred from the file device 5 in the ring buffer 7 on the basis of the managerial information of the buffer managing memory 8, and when a reproduce start is directed, the voice data control part 6 reads the voice data from the ring buffer 7 and gives it to a voice output device 4 on the basis of the managerial information of the buffer managing memory 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal processing device used in a computer device such as a personal computer.

[0002]

2. Description of the Related Art FIG. 11 is an explanatory view of a conventional example.
Is an audio signal processing device, 3 is an audio input device, 31 is an analog / digital converter (ADC), 4 is an audio output device, 4
Reference numeral 1 is a digital / analog converter (DAC), 5 is a file device, 10 is an audio reproducing device, 11 is an amplifier, 27 is a buffer, and 29 is a buffer control circuit.

The conventional voice signal processing device 1 is provided with a voice input device 3, a voice output device 4, a file device 5, a voice data control unit 6, a buffer 27, and a buffer control circuit 29.

The voice input device 3 is a voice reproducing device 10.
A voice signal from a microphone or the like (a device provided outside) is input. The voice input device is provided with an analog / digital converter (hereinafter referred to as ADC) 31,
Converts the input audio signal into a digital signal.

The audio output device 4 is provided with a digital / analog converter (hereinafter referred to as DAC), converts audio data output from the file device 5 into an analog audio signal, and outputs the analog audio signal to the amplifier 11 or the like. It is a thing.

The file device 5 is composed of, for example, a magneto-optical disk device, and stores audio data in a magneto-optical disk (hereinafter referred to as "medium") of the device. The audio data control unit 6 controls the audio input device 3, the audio output device 4, the file device 5, and the buffer control circuit 29.

The buffer 27 temporarily stores voice data transferred between the voice input device 3 and the file device 5 or between the voice output device 4 and the file device 5. The buffer control circuit 29 performs various controls during data transfer via the buffer 27. The buffer control circuit 29 is composed of hardware.

The operation of the apparatus having the above structure will be described below. When recording a voice, first, the voice signal reproduced by the voice reproducing device 10 is input to the voice input device 3 and the internal A
DC31 converts into a digital signal. The digitized voice data is transferred to and stored in the buffer 27 under the control of the voice data control unit 6. After that, the audio data stored in the buffer is read out under the control of the buffer control circuit 29, transferred to the file device 5 and stored (recorded).

Next, the processing at the time of reproducing the voice will be described. First, at the time of reproducing sound, the data read from the file device 5 is buffered by the buffer 2 under the control of the buffer control circuit 29.
Store in 7. After that, the audio output device 4 reads the data from the buffer 27 under the control of the audio data control unit 6.
Transfer to.

The voice output device 4 converts the transferred data into an analog signal by the DAC 41 and outputs the analog signal to the amplifier 11.

[0011]

SUMMARY OF THE INVENTION The above-mentioned conventional devices have the following problems. For example, when the transfer rate and the size of the audio data are changed due to the change of the voice input device or the file device, the configurations of the buffer and the buffer control circuit must be changed.

However, the conventional one has a buffer control circuit 2
Since 9 is a circuit having a hardware configuration and the buffer is a fixed buffer, its change is difficult. An object of the present invention is to solve the above-mentioned drawbacks and to be able to flexibly deal with the above-mentioned changes.

[0013]

FIG. 1 is a diagram for explaining the principle of the present invention. In FIG. 1, the same parts as those in FIG. 11 are designated by the same reference numerals. Further, 7 is a ring buffer, 8 is a buffer management memory, and 9 is an audio data transfer control unit.

In order to solve the above problems, the present invention has the following configuration. A voice input device 3 that performs a voice input process, a voice output device 4 that performs a voice output process, a file device 5 that stores voice data, and a voice data control unit 6 that controls the above devices and the like. The transfer data is temporarily stored in an audio signal processing device that transfers audio data from the audio input device 3 to the file device 5 during recording and transfers audio data from the file device 5 to the audio output device 4 during playback. Ring buffer 7 and audio data transfer control unit 9 for controlling the ring buffer 7 when transferring audio data
And an audio signal processing device provided with a buffer management memory 8 for storing management information of the ring buffer 7.

In the configuration, the area of the ring buffer 7 is divided into a plurality of areas, the head address information for each area is set in the buffer management memory 8 as the management information, and the audio data control section 6 and the audio data are set. The data transfer control unit 9 is an audio signal processing device that controls transfer of audio data by the ring buffer 7 based on the management information.

[0016]

In the case of voice recording, the voice data transfer control section 9 first issues a recording start instruction to the voice data control section 6. As a result, the audio data control unit 6 causes the buffer management memory 8 to
Based on the management information of the voice input device 3 in the ring buffer 7.
Transfer and store audio data from.

Next, the voice data transfer control unit 9 determines the ring buffer 7 based on the management information in the buffer management memory 8.
The audio data is read from and is transferred to the file device 5. In the case of audio reproduction, first, the audio data transfer control unit 9 stores the audio data transferred from the file device 5 in the ring buffer 7 based on the management information in the buffer management memory 8. Then, the audio data transfer control unit 9 issues an instruction to start reproduction to the audio data control unit 6.

Next, the audio data control section 6 reads the audio data from the ring buffer 7 based on the management information in the buffer management memory 8 and transfers it to the audio output device 4. Recording and reproduction are performed as described above, but in this case, even if the transfer rate or size of the audio data is changed, the audio data transfer control unit is configured as a software to respond to this change. The control unit can be flexibly dealt with.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 2 to 10 are views showing an embodiment of the present invention. In FIGS. 2 to 10, the same parts as those in FIGS.
It is indicated by the same reference numeral.

§1, Description of Audio Signal Processing Device Configuration FIG. 2 is a configuration diagram of an audio signal processing device according to an embodiment. As shown in the figure, the audio signal processing device 1 is provided with an audio data transfer unit 2, an audio input device 3, an audio output device 4, a file device 5, an audio data control unit 6 and the like.

The audio data transfer section 2 is provided with a ring buffer 7, a buffer management memory 8 and an audio data transfer control section 9. The ring buffer 7 divides the buffer area 71 into units, for example, every 4 Kbytes (the divided portions are hereinafter referred to as buffers). In this example, it is divided into three areas. Further, the start address of each of the divided buffer areas 71 is RD-
1, RD-2, RD-3.

In the buffer management memory 8, a region (a) managed by the control unit 91, a region (b) managed by the control unit 61, and the head addresses RD-1 to RD-1 of the ring buffer 7 are stored.
An area for storing information of RD-3 is provided.

The areas for storing the head addresses are addresses AD-1 and AD- of the buffer management memory 8, respectively.
2, the area of AD-3. The area (a) includes addresses AD-1 to AD- which are currently being processed by the voice data transfer control unit 9.
This is an area in which 3 (pointer information) is stored. For example, if the area (a) indicates the address AD-1, the address AD-1 is processed by the audio data transfer control unit 9 from the table 81 to the head address RD-1 of the buffer area 71 of the ring buffer 7. It indicates the buffer area of the ring buffer.

In the area (b), addresses AD-1 to AD-3 (pointer information) processed by the voice data control unit 6 are stored.
Is an area in which is stored. The voice data transfer control unit 9 is provided with a control unit 91, a table information analysis unit 92, and a buffer control unit 93.

The control unit 91 performs various controls in the voice data control unit 9. For example, control is performed to read the data in the area (a) and the area (b) of the table 81 of the buffer management memory 8 and pass the data to the table information analysis unit 92.

The data table information analysis unit 92 is a control unit 9
1 analyzes the data of the read area (a) and area (b). The control unit 91 issues an instruction to the buffer control unit 93 based on this analysis result. Accordingly, the buffer control unit 93 controls the data transfer of the ring buffer 7. Then, the control unit 91 updates the area (a) of the table 81 indicating the processing area of the ring buffer 7.

The voice data transfer control unit 9 can be realized by an application program. The audio data control unit 6 includes a control unit 61 and a buffer control unit 6
2 and a controller 63 are provided.

The control unit 61 controls the buffer control unit 62 and the controller 63. The control unit 61 includes an area (a) of the table 81 of the buffer management memory 8,
The area (b) is read, the read value is analyzed, and the buffer controller 62 is instructed. Thereby, the buffer control unit 62 controls the data transfer of the ring buffer 7.

The control unit 61 has a table 8 indicating the processing area of the ring buffer 7 being processed by the buffer control unit 62.
The information in the area 1 (a) is also updated. Controller 63
Controls the switching of the voice input device 3 and the voice output device 4, start and stop, and the file device 5. For example, when transferring audio data from the file device 5 to the ring buffer 7, if the capacity of the ring buffer is exceeded, the controller 6 is instructed by the control unit 61.
3 controls to stop the transfer of audio data from the file device.

Section 2, the operation of the embodiment will be described with reference to FIGS. (1) Description of voice recording FIG. 3 is an explanatory diagram of voice recording, and FIG. 4 is a process explanatory diagram of voice recording. The operation during voice recording will be described with reference to FIGS. 3 and 4. Arrows in FIG. 4 indicate the processing order.

First, the control unit 91 of the audio data transfer control unit 9 secures the memory areas of the ring buffer 7 and the buffer management memory 8 and notifies the audio data control unit 6 of the memory area.
The control unit 61 of the audio data control unit 6 receives this notification, initializes the ring buffer 7 and the buffer management memory 8, and sets an initial value. The audio data transfer control unit 9 is notified of the completion of this setting. The control unit 91 of the voice data transfer control unit 9 issues a recording start instruction to the voice data control unit 6.

The control unit 61 of the voice data control unit 6 transfers the data from the voice input device 3 to the buffer area 71 which is the buffer position indicated by the area (b) of the buffer management memory 8. For example, if the address of the area (b) indicates AD-1, the head address RD-1 of the ring buffer 7 can be obtained from the table 81 corresponding to this address.

The control unit 91 of the voice data transfer control unit 9 controls the reading of the data in the area (a) and the area (b) of the management table 81, and the data is transferred to the table information analysis unit 92. These data are analyzed by the table information analysis unit 92. When the recorded voice data is stored in the ring buffer 7 by this analysis, the buffer memory control unit 93 transfers the voice data in the stored region to the file device 5.

The operation of the voice data transfer control unit 9 is performed until an instruction to stop the recording process is given, and the voice data control unit 6 receives the instruction to stop the recording process and stops the recording according to the instruction of the control unit 61.

In the data transfer from the voice input device 3 to the ring buffer 7 described above, the transfer from the start address RD-1 to the first area is a, and the transfer from the start address RD-2 to the first area. B, start address R
When the transfer from D-3 to the first area is c, the data transfer is performed in the order of a->b->c->a-> b ...

In the data transfer from the ring buffer 7 to the file device 5, the transfer from the area starting from the head address RD-1 is d, the transfer from the area starting from the head address RD-2 is e, and the head address is When the transfer from the first area from RD-3 is f, the data transfer is d
→ e → f → d → e ...

(Explanation of Processing of Voice Data Transfer Control Section) FIG.
Is a processing flowchart of the voice data transfer control unit 9 in the case of recording, and S1 to S5 represent respective processing numbers.

In FIG. 5, the control unit 91 first reserves the memory areas for the buffer management memory 8 and the ring buffer 7, and notifies the audio data control unit 6 (S1). After setting the initial values of the buffer management memory 8 and the ring buffer 7 by the audio data control unit 6, the control unit 91 sets the audio data control unit 6
Instruct to start recording (S2).

In this initial value setting, the area (a) and the area (b) of the buffer management memory 8 are set to the same address. As an example, the area (a) and the area (b) are AD
The case where it is set to -1 will be described.

Next, the control unit 91 reads out the data in the area (a) and the data in the area (b) and controls the table information analysis unit. These data are analyzed by the table information analysis unit 92.

When the recorded voice data is stored in the ring buffer 7 in this analysis, the buffer memory control unit 93 transfers the voice data in the stored area to the file device 5 (S3).

When there is no instruction to stop the recording process (S4)
Updates the address of the area (a) (S5) and returns to the processing number (S3). This area (a) is updated by AD-1, A
The recording process is stopped in the order of D-2, AD-3, AD-1, ... Until the instruction (S4) is given.

(Explanation of processing of voice data control unit 6) FIG.
Is a processing flowchart of the audio data control unit 6 in the case of recording, and S6 to S11 indicate processing numbers.

In FIG. 6, first, the control unit 61 sets initial values in the buffer management memory 8 and the ring buffer 7 secured by the control unit 91 (S6). As an example, the case where the area (a) and the area (b) are both set to the address AD-1 will be described.

When the control section 61 receives a recording instruction from the voice data transfer control section 9 (S7), it starts from the address AD-1 shown in the area (b) to the start address R of the buffer area 71.
D-1 is obtained, and the recording data is transferred from the voice input device 3 to it (S8).

When there is no instruction to stop the recording process (S9)
Causes the control unit 61 to change the address of the area (b) to the next AD-
Update to 2 (S10). When the address of the updated area (b) becomes the same as the address of the area (a), the recording process is forcibly interrupted to prevent data destruction (S1).
1). If not, the process returns to the process number (S8). This area (b) is updated in the same manner as in the area (a) by using AD-1, A
An instruction to stop the recording process (S9) or the recording process is interrupted in the order of D-2, AD-3, AD-1, AD-2 ...
1) Until it is done.

(2) Description of Audio Playback FIG. 7 is an illustration of audio playback, and FIG. 8 is an illustration of processing during audio playback. The operation during voice reproduction will be described below with reference to FIGS. 7 and 8. Arrows in FIG. 8 indicate the processing order.

First, the control unit 91 of the audio data transfer control unit 9 secures the memory areas of the ring buffer 7 and the buffer management memory 8 and notifies the audio data control unit 6 of it.
Upon receiving the notification, the control unit 61 of the audio data control unit 6 initializes the ring buffer 7 and the buffer management memory 8 and sets an initial value. For example, the address AD-1 is set in both the area (a) and the area (b).

The control unit 91 of the voice data transfer control unit 9 writes the data transferred from the file device 5 in the buffer position indicated by the address AD-1 in the area (a). After the data transfer to the buffer position indicated by the address AD-1 of the area (a) is completed, the address AD-1 of the area (a) is updated to the next address AD-2, and the address AD of the area (a) is updated. The data transferred from the file device 5 is written in the buffer position indicated by -2. Ring buffer 7
The data transferred from the file device 5 is sequentially written in the empty space.

The control unit 91 of the audio data transfer control unit 9 issues an instruction to start reproduction to the audio data control unit 6. In the control unit 61 of the voice data control unit 6, the area (a) and the area (b)
When the address indicated by is different, the data in the buffer area 71 indicated by the area (b) is transferred to the audio output device 4.

As a result, the DAC 41 of the audio output device 4 is
Then, the voice converted into the analog voice signal can be heard through the amplifier 11 and the speaker. The control unit 91 of the audio data transfer control unit 9 performs control to read the data in the area (a) and the area (b) and pass the data to the table information analysis unit 92.
These data are analyzed by the table information analysis unit 92.
If there is a free space in the ring buffer 7 in this analysis, the buffer memory control unit 93 transfers the next data from the file device 5 to this free space.

The operation of the audio data transfer control unit 9 is performed until an instruction to stop the reproduction process is given. When the audio data control unit 6 receives the instruction to stop the reproduction process, the reproduction is stopped by the instruction of the control unit 61.

In the data transfer from the file device 5 to the ring buffer 7 described above, the transfer from the head address RD-1 to the first area is m, and the transfer from the head address RD-2 to the first area. n, start address R
When the transfer from D-3 to the first area is p, the data transfer is performed in the order of m → n → p → m → n.

In the data transfer from the ring buffer 7 to the audio output device 4, the transfer from the area starting from the start address RD-1 is g, the transfer from the area starting from the start address RD-2 is h, and the transfer from the start address RD-2 is h. When the transfer from the first area from the address RD-3 is i, the data transfer is g →
The order is h → i → g → h.

(Explanation of Processing of Voice Data Transfer Control Section) FIG.
Is a processing flowchart of the audio data transfer control unit 9 in the case of reproduction, and S21 to S26 indicate respective processing numbers.

In FIG. 9, first, the control section 91 secures the memory areas for the buffer management memory 8 and the ring buffer 7 and notifies the audio data control section 6 (S21).
The voice data control unit 6 sets initial values of the buffer management memory 8 and the ring buffer 7. Area (a) as an example
Then, the case where both the areas (b) are set to AD-1 will be described.

The control unit 91 controls the address AD of the area (a).
The data read from the file device 5 is transferred to the buffer position of the table 81 indicated by -1. After the data transfer to the buffer position indicated by the address AD-1 of the area (a) is completed, the address AD-1 of the area (a) is changed to the next address A.
Update to D-2.

Then, the address AD- of this area (a)
The data read from the file device 5 is transferred to the buffer position indicated by 2. Similarly, the data read from the file device 5 is sequentially transferred until the ring buffer 7 becomes full (S22).

The control unit 91 issues a reproduction start instruction to the audio data control unit 6 (S23). The control unit 91 controls to read the data in the area (a) and the data in the area (b) and pass the data to the table information analysis unit 92. These data are analyzed by the table information analysis unit 92. If there is a free space in the ring buffer 7 in this analysis, the buffer memory control unit 93
Transfers the next data read from the file device 5 to this free space (S24).

When there is no instruction to stop the reproduction process (S25)
The control unit 91 updates the address of the area (a) (S26) and returns to the process number (S24). If there is an instruction to stop the reproduction process (S25), the reproduction process is stopped.

(Explanation of processing by the voice data control unit 6) FIG.
Is a processing flowchart of the audio data control unit 6 in the case of reproduction, and S27 to S32 indicate respective processing numbers.

In FIG. 10, first, the control unit 61 is the buffer management memory 8 secured by the audio data transfer control unit 9.
And an initial value is set in the ring buffer 7 (S27). As an example, both the area (a) and the area (b) have the address AD.
The case where it is set to -1 will be described.

When a reproduction instruction is received from the audio data transfer control unit 9 (S28), the control unit 61 causes the head address R of the buffer area 71 indicated by the address AD-1 of the area (b) to be read.
D-1 is obtained and the data is transferred from there to the audio output device 4 (S29). If there is no instruction to stop the playback process (S
30), the control unit 61 updates the address of the area (b) to the next AD-2 (S31). When the updated address of the area (b) becomes the same as the address of the area (a), the reproduction process is forcibly interrupted in order to prevent the reproduction of extra audio data (S32). Otherwise, the process number (S2
Return to 9). This area (b) is updated in the same manner as the area (a), AD-1, AD-2, AD-3, AD-1, AD-.
The process is performed in the order of 2 ... Until the instruction to stop the reproduction process (S30) or the reproduction process is interrupted (S32).

(Other Embodiments) The embodiments have been described above, but the present invention can be implemented as follows. The division of the ring buffer is not limited to three and can be set arbitrarily.

The file device is not limited to the magneto-optical disk, but a magnetic disk device or the like can be used,
For reproduction, a CD (compact disc) device can be used.

[0066]

Since the ring buffer is used and the voice data transfer control unit is configured by software, even if the transfer rate and size of the voice data are changed by changing the voice input / output device or the file device, for example, The configuration of the data transfer control unit can be flexibly dealt with.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a configuration diagram of an audio signal processing device according to an embodiment.

FIG. 3 is an explanatory diagram of voice recording according to the embodiment.

FIG. 4 is an explanatory diagram of processing during voice recording according to the embodiment.

FIG. 5 is a processing flowchart of a voice data transfer control unit in the case of recording in the embodiment.

FIG. 6 is a processing flowchart of an audio data control unit in the case of recording in the embodiment.

FIG. 7 is an explanatory diagram of audio reproduction according to the embodiment.

FIG. 8 is an explanatory diagram of processing at the time of audio reproduction in the embodiment.

FIG. 9 is a processing flowchart of an audio data transfer control unit in the case of reproduction in the embodiment.

FIG. 10 is a processing flowchart of the audio data control unit in the case of reproduction in the embodiment.

FIG. 11 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 3 audio input device 4 audio output device 5 file device 6 audio data control unit 7 ring buffer 8 buffer management memory 9 audio data transfer control unit

Claims (2)

[Claims] 1. A voice input device (3) for performing voice input processing, a voice output device (4) for performing voice output processing, a file device (5) for storing voice data, and each of the above devices. It is equipped with a voice data control unit (6) for controlling, and from the voice input device (3) to the file device (5) during recording.
In a voice signal processing device for transferring voice data to a voice output device (4) from a file device (5) during playback, a ring buffer (temporarily storing the transfer data during recording / playback). 7), a voice data transfer control unit (9) for controlling the ring buffer (7) during the transfer of voice data, and a buffer management memory (8) for storing management information of the ring buffer (7). An audio signal processing device characterized by: 2. The audio signal processing device according to claim 1, wherein an area of the ring buffer (7) is divided into a plurality of areas, and head address information of each area is used as the management information for a buffer management memory ( 8), the audio data control unit (6) and the audio data transfer control unit (9) set the ring buffer (7) based on the management information.
An audio signal processing device, characterized in that transfer control of audio data is performed by the.