Real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data

• US 6,252,830 B1
• Filed: 10/15/1999
• Issued: 06/26/2001
• Est. Priority Date: 10/15/1999
• Status: Expired due to Fees

• Current Assignee: William Hsu
• Original Assignee: William Hsu
• Inventors: Hsu, William
• Primary Examiner(s): DINH, TAN X
• Application Number:
  US09/418,497
• Time in Patent Office: 620 Days
• Field of Search: 369/25, 369/27, 369/32, 369/33, 369/1, 369/2, 369/7, 369/12, 369/19, 704/500, 704/208, 704/268, 704/270
• US Class Current: 704/500
• CPC Class Codes: G11B 21/12 Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation

Abstract

A real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data is disclosed. The apparatus comprises a real-time decompressing module for reproducing digital voice; a pre-module for real-time compressing digital voice; a long-term primary and secondary power control module; a controllable working-frequency adjusting module; a linking module for supplying power; and a digital voice memory module. Therefore, the digital voice is not distorted, the voice data is read directly from computer network and audio input unit and real-time compressed to store in memory. Moreover, the decompression operation is performed simultaneously with the compression operation to real-time playback voice data. The data can be sustained for long time. The present invention provides primary power for main operation and secondary power for memory storage, and uses SDRAM in place of flash memory to reduce cost.

Claims

1. A real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data comprising:

a digital voice processing unit as the control center of the real-time compressing and decompressing apparatus, said digital voice processing unit providing the function of A/D conversion and D/A conversion, and real-time compressing and decompressing operations;

a digital audio driver connected to said digital voice processing unit and functioned to convert the real-time decompressed digital voice to analog voice and amplify the analog voice to compensate signal attenuation, thus driving an audio output unit; and

real-time compress the analog voice sent from an audio input unit to said digital voice processing unit;

a voice memory unit connected to said digital voice processing unit and functioned to store the voice data compressed by said digital voice processing unit;

a power and working-frequency control unit connected to said digital voice processing unit and voice memory unit, and functioned to adjust the supplied power of an external battery set and the working frequency of a computer to values suitable for said digital voice processing unit and said voice memory unit;

a computer interface unit connected to said digital voice processing unit and said power and working-frequency control unit, said computer interface unit functioned to enable said digital voice processing unit and said computer to share the voice data, said computer interface unit transmitting the power of said computer to said working-frequency control unit to charge said digital voice processing unit and said voice memory unit, and charging said battery set when sharing the voice data; and

a display and input control module connected to said digital voice processing unit and sequentially receiving the command from an input control unit and sending the command to said digital voice processing unit, said display and input control module receiving the command of said digital voice processing unit and interpreting each display and control command such that said audio output unit, said audio input unit, said computer and said display unit can function according to the interpreted command.

2. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, said digital voice processing unit further comprises an expansion control code unit for providing human-machine interface.

3. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said digital audio driver is connected to at least one external audio output unit whereby multi-soundtrack voice can be reproduced without using a computer.

4. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said digital audio driver is connected to at least one external audio input unit, the data format of said audio input unit can be MP3, MP4, real-time encryption or EPP/USB.

5. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said power and working-frequency control unit is connected to at least one battery set to provide primary power and the function of data sustainment of said voice memory unit after power off.

6. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said digital voice processing unit is connected to an expansion voice memory, said expansion voice memory and said voice memory unit being preferably SDRAM.

7. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said input control unit can be several playback keys and recording keys.

8. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said display unit can be liquid crystal display, illuminance display or plasma display.

9. The real-time compressing and decompressing apparatus for recording and reproducing multi-soundtrack voice data as in claim 1, wherein said computer interface unit can be parallel input, serial input, MPIB, or BCD.