JPS56123182A - Encoding and decoding device for picture signal - Google Patents
Encoding and decoding device for picture signalInfo
- Publication number
- JPS56123182A JPS56123182A JP2751380A JP2751380A JPS56123182A JP S56123182 A JPS56123182 A JP S56123182A JP 2751380 A JP2751380 A JP 2751380A JP 2751380 A JP2751380 A JP 2751380A JP S56123182 A JPS56123182 A JP S56123182A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- forecasted
- value
- adder
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To improve characteristics of response to the sudden change in input signal by discriminating the value of a forecasted error signal and by adding a constant value to a forecasting signal which forecasts the value of the next sampling point when preset discrimination conditions are satisfied. CONSTITUTION:Forecasted error signal Y-P obtained from input signal Y and forecasting signal P is supplied to encoder 3 to obtain encoded signal D. Encoded signal D is sent to quantizer 5 to obtain quantized signal X, which is contrasted with conditions predetermined by discriminating circuit 13 to obtain constant value alpha. Quantized signal X, on the other hand, is passed through delay elements 10 and 11 to obtain reproduced delay signal Z<-2>, which is added by adder 14 to output alpha of discriminating circuit 13. Output Z<-2>' of adder 14 is delayed by one sample at delay element 12 to obtain forecasted signal P. Thus, even if input signal Y varies suddenly, an output signal having superior response characteristics can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2751380A JPS56123182A (en) | 1980-03-04 | 1980-03-04 | Encoding and decoding device for picture signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2751380A JPS56123182A (en) | 1980-03-04 | 1980-03-04 | Encoding and decoding device for picture signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56123182A true JPS56123182A (en) | 1981-09-28 |
Family
ID=12223204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2751380A Pending JPS56123182A (en) | 1980-03-04 | 1980-03-04 | Encoding and decoding device for picture signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56123182A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5440507A (en) * | 1977-09-06 | 1979-03-30 | Mitsubishi Electric Corp | Band compressor |
-
1980
- 1980-03-04 JP JP2751380A patent/JPS56123182A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5440507A (en) * | 1977-09-06 | 1979-03-30 | Mitsubishi Electric Corp | Band compressor |
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