JPS579128A - Forecast encoding device - Google Patents
Forecast encoding deviceInfo
- Publication number
- JPS579128A JPS579128A JP8336280A JP8336280A JPS579128A JP S579128 A JPS579128 A JP S579128A JP 8336280 A JP8336280 A JP 8336280A JP 8336280 A JP8336280 A JP 8336280A JP S579128 A JPS579128 A JP S579128A
- Authority
- JP
- Japan
- Prior art keywords
- forecast
- signal
- adder
- transmitted
- 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
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
Abstract
PURPOSE:To simplify the constitution of device and to prevent the increase in quantized noise due to forecast encoding and decoding, by quantizing a forecast signal operated with higher accuracy than that for quantization of an input signal from a decoded signal, with the same degree of accuracy. CONSTITUTION:A code signal transmitted from a transmission line is transmitted from an input terminal 12 of a forecast encoding device to a code conversion circuit 13, and a quantized forecast error signal corresponding to the respective code is inputted to an adder 14. A decoded signal obtained at the output of the adder 14 is applied to an adder 15, where a signal of a DC component having 0.5 amplitude produced at a DC component generating circuit 16 is added to a decoded signal and transmitted to a forecast device 17, to obtain the forecast signal added with the DC component for the output of the forecast device 17 having the same forecast characteristics as a forecast device 8 of the encoding device. This signal is rounded off for the fractions at a round-off circuit 18 to obtain the forecast signal having the same accuracy for quantization as that for a digital video input signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8336280A JPS579128A (en) | 1980-06-18 | 1980-06-18 | Forecast encoding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8336280A JPS579128A (en) | 1980-06-18 | 1980-06-18 | Forecast encoding device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS579128A true JPS579128A (en) | 1982-01-18 |
Family
ID=13800309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8336280A Pending JPS579128A (en) | 1980-06-18 | 1980-06-18 | Forecast encoding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS579128A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5157157A (en) * | 1974-11-15 | 1976-05-19 | Hitachi Ltd | ad henkanhoshiki |
-
1980
- 1980-06-18 JP JP8336280A patent/JPS579128A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5157157A (en) * | 1974-11-15 | 1976-05-19 | Hitachi Ltd | ad henkanhoshiki |
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