JPS6432576A - Decoding method for moving image signal and its decoder - Google Patents
Decoding method for moving image signal and its decoderInfo
- Publication number
- JPS6432576A JPS6432576A JP63170331A JP17033188A JPS6432576A JP S6432576 A JPS6432576 A JP S6432576A JP 63170331 A JP63170331 A JP 63170331A JP 17033188 A JP17033188 A JP 17033188A JP S6432576 A JPS6432576 A JP S6432576A
- Authority
- JP
- Japan
- Prior art keywords
- coefficient
- circuit
- cut
- orthogonal transform
- output
- 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
Abstract
PURPOSE:To prevent deterioration in picture quality by rounding off a coefficient of an orthogonal transform being the result of decoding the orthogonal transform coefficient of a present frame or the coefficient of orthogonal transform of a present frame obtained inter-frame prediction. CONSTITUTION:A picture signal inputted from an input terminal 100 is subject to orthogonal conversion by an orthogonal transform circuit 1 and a difference of an output signal of an inter-frame prediction device 2 is taken by a subtraction circuit 3. A coefficient round-off circuit 5 cuts off part of the coefficient based on mode information generated from a cut-off coefficient discrimination circuit 81. An output signal of the circuit 5 is outputted from an output terminal 200 as a coding picture signal. A cut-off discrimination circuit 81 generates mode information representing which coefficient is to be cut off and outputs the result from an output terminal 210. The coefficient cut-off circuit 6 cuts off the coefficient relating to the cut-off coefficient by the circuit 5 from the output of the inter-frame predicting device 2. The adder 4 adds output signals of the circuits 5, 6, sends the result to the predicting device 2 and the next frame signal is predicted and outputted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63170331A JPS6432576A (en) | 1988-07-07 | 1988-07-07 | Decoding method for moving image signal and its decoder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63170331A JPS6432576A (en) | 1988-07-07 | 1988-07-07 | Decoding method for moving image signal and its decoder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6432576A true JPS6432576A (en) | 1989-02-02 |
Family
ID=15902960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63170331A Pending JPS6432576A (en) | 1988-07-07 | 1988-07-07 | Decoding method for moving image signal and its decoder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6432576A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007148425A1 (en) * | 2006-06-19 | 2007-12-27 | Fujitsu Limited | Image compressing device, image restoring device, and program |
-
1988
- 1988-07-07 JP JP63170331A patent/JPS6432576A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007148425A1 (en) * | 2006-06-19 | 2007-12-27 | Fujitsu Limited | Image compressing device, image restoring device, and program |
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