JPS54111214A - Adaptive extended variable length coding system - Google Patents

Adaptive extended variable length coding system

Info

Publication number
JPS54111214A
JPS54111214A JP1884078A JP1884078A JPS54111214A JP S54111214 A JPS54111214 A JP S54111214A JP 1884078 A JP1884078 A JP 1884078A JP 1884078 A JP1884078 A JP 1884078A JP S54111214 A JPS54111214 A JP S54111214A
Authority
JP
Japan
Prior art keywords
quantizing
bit
equipment
circuit
variable length
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
JP1884078A
Other languages
Japanese (ja)
Inventor
Keiji Kahara
Tomoyoshi Yamashita
Mitsuo Ishii
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 JP1884078A priority Critical patent/JPS54111214A/en
Publication of JPS54111214A publication Critical patent/JPS54111214A/en
Pending legal-status Critical Current

Links

Landscapes

  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Color Television Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE: To prevent the generation of quantization noise in a flat part by switching alternately two quantizing equipments to use the five-bit quantizing equipment and the four-bit quantizing equipment in the flat part of the picture and the much change part of the picture respectively.
CONSTITUTION: Picture signals are applied to five-bit quantizing coder 1 and four- bit quantizing coder 2, and the output of circuit 1 and the output of circuit 2 are sent to five-bit decoder 3 and four-bit decoder 4 respectively, and the output of circuit 3 or circuit 4 is supplied to ROM 5. Here, quantizing equipments 4 and 5 are switched alternately to use five-bit quantizing equipment 1 and four-bit quantizing equipment 2 in the flat part and the much change part of the picture respectively, so that the generation of quantization noise in the flat part can be prevented.
COPYRIGHT: (C)1979,JPO&Japio
JP1884078A 1978-02-20 1978-02-20 Adaptive extended variable length coding system Pending JPS54111214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1884078A JPS54111214A (en) 1978-02-20 1978-02-20 Adaptive extended variable length coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1884078A JPS54111214A (en) 1978-02-20 1978-02-20 Adaptive extended variable length coding system

Publications (1)

Publication Number Publication Date
JPS54111214A true JPS54111214A (en) 1979-08-31

Family

ID=11982746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1884078A Pending JPS54111214A (en) 1978-02-20 1978-02-20 Adaptive extended variable length coding system

Country Status (1)

Country Link
JP (1) JPS54111214A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56136093A (en) * 1980-03-26 1981-10-23 Fuji Photo Film Co Ltd Adaptive quantizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56136093A (en) * 1980-03-26 1981-10-23 Fuji Photo Film Co Ltd Adaptive quantizer
JPH0216075B2 (en) * 1980-03-26 1990-04-16 Fuji Photo Film Co Ltd

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