JPS6427379A - Picture coding device - Google Patents

Picture coding device

Info

Publication number
JPS6427379A
JPS6427379A JP62183850A JP18385087A JPS6427379A JP S6427379 A JPS6427379 A JP S6427379A JP 62183850 A JP62183850 A JP 62183850A JP 18385087 A JP18385087 A JP 18385087A JP S6427379 A JPS6427379 A JP S6427379A
Authority
JP
Japan
Prior art keywords
quantization characteristic
signal
inputted
control circuit
coding control
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
JP62183850A
Other languages
Japanese (ja)
Inventor
Shinichi Maki
Kiichi Matsuda
Toshitaka Tsuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62183850A priority Critical patent/JPS6427379A/en
Publication of JPS6427379A publication Critical patent/JPS6427379A/en
Pending legal-status Critical Current

Links

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  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

PURPOSE:To always attain the periodic refresh while the quantization characteristic is always in the best state by providing a coding control circuit making a quantization characteristic of a quantizer dense and generating a selection signal sending forcibly an output of an in-frame prediction device as a refresh signal. CONSTITUTION:In receiving a signal representing the memory occupancy sent from a buffer memory, it is inputted to a flip-flop 31 of a coding control circuit 10. The occupancy information is inputted to a comparator 32 synchronously with a clock signal in the unit of block lines and compared with a threshold value. A ROM 34 stores the quantization characteristic (step size) corresponding to the occupied quantity, decides the quantization characteristic in response to the inputted occupied quantity and outputs the signal. A selector selects an output of the device 2 so as to quantize and to send and the quantizer 1 applies quantization according to the quantization characteristic commanded by a coding control circuit 10.
JP62183850A 1987-07-23 1987-07-23 Picture coding device Pending JPS6427379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62183850A JPS6427379A (en) 1987-07-23 1987-07-23 Picture coding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62183850A JPS6427379A (en) 1987-07-23 1987-07-23 Picture coding device

Publications (1)

Publication Number Publication Date
JPS6427379A true JPS6427379A (en) 1989-01-30

Family

ID=16142925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62183850A Pending JPS6427379A (en) 1987-07-23 1987-07-23 Picture coding device

Country Status (1)

Country Link
JP (1) JPS6427379A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05122683A (en) * 1991-10-30 1993-05-18 Mitsubishi Electric Corp Picture storage transfer device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05122683A (en) * 1991-10-30 1993-05-18 Mitsubishi Electric Corp Picture storage transfer device

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