JPS54114962A - Coder - Google Patents
CoderInfo
- Publication number
- JPS54114962A JPS54114962A JP2264078A JP2264078A JPS54114962A JP S54114962 A JPS54114962 A JP S54114962A JP 2264078 A JP2264078 A JP 2264078A JP 2264078 A JP2264078 A JP 2264078A JP S54114962 A JPS54114962 A JP S54114962A
- Authority
- JP
- Japan
- Prior art keywords
- rom
- signal
- line
- input
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
PURPOSE: To simply constitute the expected coding PCM system coding analog signal into digital signal by using a plural number of memories.
CONSTITUTION: The analog signal is inputted to the A/D converter 2 from the input terminal 1 and converted into the linear quantized PCM signal in synchronizing with the basic pulse generator 13. The PCM signal is inputted to the address signal input line 5 of ROM 3, and the address signal input line 6 of ROM 3 is connected to the output signal line 11 of ROM 4. The expected value calculated from the pre-sampling value is constituted to be appeared at the output of ROM 4. ROM 3 takes the difference between the existing input sample value and the expected value, and the companding function operated to the difference is appeared at the output signal line and the inverse conversion of it is at the output signal line 8. The bit correspondence is made so that ROM 4 outputs the value equal to the sum of the address input signal lines 9 and 10, and ROM 4 performs readout in synchronizing with the basic pulse.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2264078A JPS54114962A (en) | 1978-02-27 | 1978-02-27 | Coder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2264078A JPS54114962A (en) | 1978-02-27 | 1978-02-27 | Coder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54114962A true JPS54114962A (en) | 1979-09-07 |
Family
ID=12088428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2264078A Pending JPS54114962A (en) | 1978-02-27 | 1978-02-27 | Coder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114962A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01181328A (en) * | 1988-01-14 | 1989-07-19 | Canon Inc | Encoder |
JPH01216627A (en) * | 1988-02-24 | 1989-08-30 | Canon Inc | Coding and decoding system |
JPH02123830A (en) * | 1988-11-02 | 1990-05-11 | Canon Inc | Coding and decoding system |
JPH04196924A (en) * | 1990-11-28 | 1992-07-16 | Sharp Corp | Digital signal demodulator |
JPH04369123A (en) * | 1991-06-17 | 1992-12-21 | Matsushita Electric Ind Co Ltd | Dpcm coder |
-
1978
- 1978-02-27 JP JP2264078A patent/JPS54114962A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01181328A (en) * | 1988-01-14 | 1989-07-19 | Canon Inc | Encoder |
JPH01216627A (en) * | 1988-02-24 | 1989-08-30 | Canon Inc | Coding and decoding system |
JPH02123830A (en) * | 1988-11-02 | 1990-05-11 | Canon Inc | Coding and decoding system |
JPH04196924A (en) * | 1990-11-28 | 1992-07-16 | Sharp Corp | Digital signal demodulator |
JPH04369123A (en) * | 1991-06-17 | 1992-12-21 | Matsushita Electric Ind Co Ltd | Dpcm coder |
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