JPS54114962A - Coder - Google Patents

Coder

Info

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
Application number
JP2264078A
Other languages
Japanese (ja)
Inventor
Fumio Maehara
Hidekazu Tsuboka
Hiroshi Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2264078A priority Critical patent/JPS54114962A/en
Publication of JPS54114962A publication Critical patent/JPS54114962A/en
Pending legal-status Critical Current

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  • 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
JP2264078A 1978-02-27 1978-02-27 Coder Pending JPS54114962A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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