JPS641383A - Inter-frame compression coding device for picture signal - Google Patents
Inter-frame compression coding device for picture signalInfo
- Publication number
- JPS641383A JPS641383A JP15679387A JP15679387A JPS641383A JP S641383 A JPS641383 A JP S641383A JP 15679387 A JP15679387 A JP 15679387A JP 15679387 A JP15679387 A JP 15679387A JP S641383 A JPS641383 A JP S641383A
- Authority
- JP
- Japan
- Prior art keywords
- vector
- coefficient
- quantizing
- numbers
- frequency component
- 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
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- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
PURPOSE: To improve picture quality by vector-quantizing the coefficients of selected sets to representative vector numbers and transmitting and coding them which have been vector-quantized.
CONSTITUTION: A coding vector quantizing device deciding circuit 127 selects a set including the coefficient of 10, which corresponds to a low frequency component, or selects the set of 2, which includudes all the coefficients in accordance with the character of a coefficient which an orthogonal transform circuit 406a has orthogonally transformed and the order of the set of 2, which has been previously decided. Vector quantizing devices 109 and 110 vector-quantize the coefficient of 10 corresponding to the low frequency component and the coefficient of 6 corresponding to a high frequency component to the representative vector numbers. Vector quantizing decoders 115 and 116 reproduce them to orthogonally transformed coefficients by the vector numbers from the vector quantizing devices 109 and 110. Since picture quality is not deteriorated in a part where the statistical character of a predictive error differs, and only the representative vector numbers are coded and transferred, a picture signal can efficiently be compressed and transferred.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-156793A JPH011383A (en) | 1987-06-24 | Interframe compression encoding device for image signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-156793A JPH011383A (en) | 1987-06-24 | Interframe compression encoding device for image signals |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS641383A true JPS641383A (en) | 1989-01-05 |
JPH011383A JPH011383A (en) | 1989-01-05 |
Family
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01213084A (en) * | 1988-02-22 | 1989-08-25 | Canon Inc | Picture encoding system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01213084A (en) * | 1988-02-22 | 1989-08-25 | Canon Inc | Picture encoding system |
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