JPS63190470A - Audio and picture processing unit - Google Patents

Abstract

PURPOSE:To make the memory efficient by storing a picture and voice data in a series of memory respectively. CONSTITUTION:Voice information is coded through a line 33, NCU 15, a changeover switch 35 and ADPCM 39 and the coded data is stored in a RAM 4 via a CPU 2. Moreover, the coded picture data by a MODEM 14 is stored in the RAM 4. Thus, the picture and voice data are stored respectively in a series of memories to improve the memory utilizing rate and to suppress the memory cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio and image processing device for recording audio and images.

[Prior Art] A typical example of a conventional device of this type is a facsimile machine that can also record and reproduce voice information. A general configuration diagram of such a facsimile machine is shown in FIG.
5→After being converted into digital data by the ADPCM 139, it is stored in the RAM 104'.

On the other hand, the image information received via the line 133 is sent to the NCU1
15→The data is encoded into digital data via the modem 114 and sequentially stored in the RAM 104.

[Problems to be solved by the invention] However, in such a device, audio data and image data are stored in separate memories, so the memory cannot be used efficiently and the memory capacity becomes large. However, the disadvantage is that the system becomes larger and the cost becomes higher.

The present invention has been made in view of such prior art, and it is an object of the present invention to provide an audio and image processing device that improves memory efficiency.

[Means for Solving the Invention] In order to solve this problem, the present invention has the following configuration.

That is, a voice input means for converting voice information into digital data and inputting it, an image input means for converting image information into digital data and inputting it, a memory for storing the voice information and image information, and the voice information, and storage means for storing image information by sharing the memory.

[Operation] In the configuration of the present invention, the audio information and image information inputted by the audio input means and the image input means are stored in a common memory by the storage means.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Description of Basic Configuration (FIG. 1)] FIG. 1 is a block diagram showing the overall configuration of a facsimile machine according to the present embodiment that can also record/play back audio.

In the figure, 1 is a crystal oscillator, which generates a reference clock for the entire device. The output clock of the crystal oscillator 1 is given as a reference clock to a CPU (Central Processing Unit) 2 comprising a desired microprocessor element or the like. CPU
2 is connected to ROM3.2 by a data and address bus. RAM4
．． Timer 5. PP I (Programmable
Parallel l10) 9, 11, 12
It is connected to and controls the entire facsimile machine. Further, the CPU 2 encodes and decodes image data. In addition, the ROM 3 also includes FIGS. 3(a) and (b), which will be described later.
The processing procedures (programs) shown in FIGS. 4(a) and 4(b) are stored.

The UPI 9 controls the feed drive of originals and recording paper. Further, UPIII controls the recording system of the parallel-to-serial converter 25 and the thermal head, and UP112 controls the key input switch 31 and the liquid crystal display LCD32.

A modem 14 modulates and demodulates image data and transmits and receives procedure signals for facsimile communication procedures. A network control unit (NCU) 15 switches the connection of the line 33 to the telephone 34 side or the modem 14 side. Further, 16 is a dialer, which sends a dial signal to the line 33 in accordance with the telephone number data of the communication destination outputted from the CPU 2 via the PP17. 18 is a speaker drive circuit, 19 is a speaker, and when the relay 8 is turned on, the signal from the line 33 is outputted as a sound.

Now, in the above configuration, audio information is transmitted from line 33→
Encoded by NCU 15 → changeover switch 35 → ADPCM 39, and the encoded data is sent to RA via CPU 2.
Stored in M4. Further, image data encoded by the modem 14 is also stored in the RAM 4.

Also, when playing audio, the CPU 2 gives a playback command to the ADPCM 39, and the data in the RAM 4 is continuously transferred to the ADPCM 39.
It is combined by outputting to CM39, and relay 8'
→Speaker drive circuit 18'→Speaker 19'.

[Description of processing for storing audio/image data (FIGS. 2 to 4(b))] Next, a procedure for storing encoded audio/image data in the RAM 4 will be described.

FIGS. 2(a) to 2(d) show the address space of the CPU 2 of this device. In the figure, 20 is a program area of the ROM 3 (in which programs to be described later are stored).

Further, the subsequent address space includes a data area 21a for storing encoded audio and image data, and a CPU 2
The data area 21a and the work area 21b are both provided in the RAMJ. In the illustrated address space, the upper direction indicates a lower address direction, and the lower direction indicates a higher address direction.

Now, when image data is input from the line 33 via the modem 14 (assuming that there is no image data in the data area 21a), the image data is stored in order from point x (downward in the figure). Furthermore, when encoded audio data is input in the same way (assuming that there is no image data in the data area 21a), it will be stored in order from point Y (upward in the figure).

FIGS. 2(b) to 2(d) each show how encoded image data and audio data are stored (each data is stored in the direction of the arrow in the figure).

In this embodiment, for example, when a certain amount of image data has already been stored and audio data is to be stored,
If there is image data in the storage location, no more audio data is stored (error processing is performed). This also applies when storing image data. Furthermore, when storing audio and image data, storage limit points for each data were set in the Oki embodiment. Point X' in the figure (meaning the image data storage limit position), Y
' point (meaning the voice data storage limit position) is that point.

For example, when audio data is stored in RAMJ, when the first address (let's call it pointer T) has been stored up to point Y', it will not be stored in any further area. (See Figure 2(d)).

[Description of data storage procedure (FIGS. 3(a) and (b))] Hereinafter, the audio data and image data storage processing procedure will be described according to the flowcharts of FIGS. 3(a) and (b).

First, the procedure for storing audio data will be explained.

In step S1, the address of point Y is set in a pointer T (not shown) that is a storage destination for audio data. Next, in step S2, it is determined whether the value of this pointer T is smaller than the storage limit position Y'.

At this time, if it is determined that pointer T<Y', there is no storage area at step S3.
Error processing (memory overflow processing, etc.) will be performed in the future, but at this point, this judgment is only possible if the pointer T ≥
This will be explained as Y'.

Now, in this case, the audio data is transferred to ADP in step S4.
input via CM39, and in step s5 pointer T
The audio data is stored in the address location of RAM 4 indicated by . Next, the process moves to step S6, where the current pointer T is decremented by 1'' in order to be updated (the updated pointer T indicates the storage destination of the next audio data).In step S7, one audio storage process is performed. It is determined whether or not the process has been completed, but if it is determined that it has not been completed, steps 82 to
The process of step S7 will be repeated.

Note that the criteria for this step S7 is that in addition to determining that there is literally no audio data to be stored, it is also determined whether the length of time of audio information to be stored at one time has exceeded a predetermined value (for example, about 8 seconds). shall judge.

Next, the procedure for storing image data will be explained (see FIG. 3(b)).

In step Sll, the address of point Y is set in a storage pointer (hereinafter referred to as pointer P) for storing image data. Next, in step S12, it is determined whether the value of this pointer P is larger than the storage limit position X'.

At this time, if it is determined that the pointer p>x', there is no storage area, so step S13
Error processing (same processing as when storing audio data) is performed, but here, if the pointer P≦X'
It will be explained as follows.

Now, in this case, image data is input via the modem 14 in step S14, and pointer P is input in step S15.
The image data is stored in the address position of RAM 4 indicated by . Next, the process moves to step S16, and "1" is added to update the current pointer P (the updated pointer P indicates the storage location of the next image data).

In step S17, it is determined whether one image storage process has been completed, but if it is determined that it has not been completed, step S17 is performed.
The processes from step S12 to step S17 are repeated. still,
The determination criteria in step S17 are the same as in the audio information storage process described above.

[Explanation of data output procedure (Fig. 4 (a), (b))] With the above processing procedure, audio data and image data are
The data is sequentially stored in the AM4, and the procedure for outputting the stored data will be explained below with reference to FIGS. 4(a) and 4(b).

First, the procedure for outputting audio data will be explained (Fig. 4(a)).
.

In step S21, the address (
Point Y) is set to pointer T. Next step S22
Then, it is determined whether the value of the pointer T is smaller than the storage limit position Y' (same as in FIG. 3(a)). At this time, when the pointer T<Y', the process moves to step S23 and the same error handling as at the time of storage is performed.

Now, if it is determined in step S22 that pointer T≧Y', the process moves to step S24, and audio data is read from the address indicated by pointer T in the RAM 4. In the next step S25, the read audio data is
/DPCM39 converts the audio data to relay 8.
', the switch 35.' selects whether the sound is output from the speaker 19' via the speaker drive circuit 18' or the audio information output from the A/D PCM 39. The output is transferred onto the line 33 via the NCU 15. Next, the process moves to step 326, where the current pointer T is decremented by "1" in order to be updated.

In step 527, it is determined whether one round of audio output processing has been completed, but if it is determined that it has not been completed, step 3
The processes from step S22 to step S27 are repeated.

Next, the procedure for outputting image data will be explained (Fig. 4(b)).
.

In step 531, the address (
Point X) is set to pointer P. Next step S3
2, it is determined whether the value of this pointer P is larger than the storage limit position X'.

At this time, if it is determined that pointer P>X', the process moves to step S33 and an error process is performed, but here, the description will be made assuming that pointer P≦X'.

Now, if it is determined in step 532 that pointer T≦X', the process moves to step S34, and image data is read from the address indicated by pointer P in RAM 4. In the next step S35, the read image data is modulated by the modem 14 and transferred to the line 33 via the NCU 15, or is printed out by controlling the UPIII and using the thermal head via the parallel/serial conversion key 25. do. Next, the process moves to step S36, and in order to update the current pointer P, the pointer P is changed by 1'.

Add. In step S37, it is determined whether or not one image output process has been completed. If it is determined that it has not been completed, the processes from step 332 to step S37 are repeated.

As described above, according to this embodiment, by storing image and audio data in a series of memories from opposite directions, it is possible to increase memory usage rate and to suppress memory costs.

In this embodiment, for example, when storing audio data in the RAM, in order to prevent it from being written into the image data area, steps S2 and S4 in the flowchart of FIG. 3(a) are performed. In between, a new branch may be provided to determine whether the pointer T is the pointer P, and if this judgment is true, the process may proceed to step S3. The same applies to FIG. 3(b), which is the image data storage processing procedure.

[Effects of the Invention] As described above, according to the present invention, by storing image and audio data respectively in a series of memories, it is possible to increase the memory usage rate and to suppress memory costs.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of the audio/image facsimile device in this embodiment, FIGS. 2(a) to (d) are diagrams showing how audio and image data are stored in this embodiment, and FIG. 3(a) ) is a flowchart showing the procedure for storing audio data; FIG. 3(b) is a flowchart showing the procedure for storing image data; FIG. 4(a) is a flowchart showing the procedure for outputting audio data; b) is a flowchart showing the procedure for outputting image data, and FIG. 5 is a diagram for explaining a conventional example. In the figure, 1...Crystal oscillator, 2...CPU, 3...
ROM, 4...RAM, 5...Timer, 6, 7.1
0...PPI, 9,11.12...UPI, 8.8
'...Relay, 13...DMA controller,
1'4...Modem, 15...NCU, 16...Dialer, 18°18'...Speaker drive circuit, 19
...Speaker, 39...ADPCM.

Claims (3)

[Claims] (1) Audio input means for converting audio information into digital data and inputting it, image input means for converting image information into digital data and inputting it, a memory for storing the audio information and image information, and the audio information , storage means for storing image information by sharing the memory. (2) A patent characterized in that the storage means stores the audio information in the memory in a predetermined direction, and stores the image information in the memory in a direction opposite to the direction in which the audio information is stored in the audio storage means. An audio image processing device according to claim 1. (3) The audio image processing device according to claim 1, wherein storage start positions of audio information and image information in the memory are a start address and an end address of the memory, respectively.