JPS54111214A - Adaptive extended variable length coding system - Google Patents
Adaptive extended variable length coding systemInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56136093A (en) * | 1980-03-26 | 1981-10-23 | Fuji Photo Film Co Ltd | Adaptive quantizer |
-
1978
- 1978-02-20 JP JP1884078A patent/JPS54111214A/en active Pending
Cited By (2)
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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