JPS5744384A - Adaptive quantization and encoding system for television signal - Google Patents
Adaptive quantization and encoding system for television signalInfo
- Publication number
- JPS5744384A JPS5744384A JP55120406A JP12040680A JPS5744384A JP S5744384 A JPS5744384 A JP S5744384A JP 55120406 A JP55120406 A JP 55120406A JP 12040680 A JP12040680 A JP 12040680A JP S5744384 A JPS5744384 A JP S5744384A
- Authority
- JP
- Japan
- Prior art keywords
- field
- forecasting
- forecasted
- picture elements
- television signal
- 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.)
- Granted
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
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Color Television Systems (AREA)
Abstract
PURPOSE:To reduce the volume of transmitted information by performing in-field forecasting and field-to-field forecasting, finding differences between a real value and both forecasted values, and determining the number of bits of differential quantization according to a maximum error within the range of one eight-picture-element block. CONSTITUTION:A one-field television signal is stored in a storage part 5, and a television signal of >=8 picture elements is stored in auxiliary storage parts 6 and 7. A control part 8 compares the forecasting outputs of an in-field forecasting part 1 and a field-to-field forecasting part 2 with a real vaue to select a larger forecasted error absolute value. When the largest value is greater than a threshold value TH on the completion of one block of eight picture elements, quantization into 27 levels is carried out. When it is >=1/2TH, quantized into three levels, and when it is >=1/4TH, even-numbered picture elements are quantized into one or two bits and odd-numbered picture elements are assumed to have no forecasted error. When it is <=1/4TH, all forecasted errors are assured to be 0s, and transmission is not executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55120406A JPS5744384A (en) | 1980-08-29 | 1980-08-29 | Adaptive quantization and encoding system for television signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55120406A JPS5744384A (en) | 1980-08-29 | 1980-08-29 | Adaptive quantization and encoding system for television signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5744384A true JPS5744384A (en) | 1982-03-12 |
| JPS6340393B2 JPS6340393B2 (en) | 1988-08-10 |
Family
ID=14785420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55120406A Granted JPS5744384A (en) | 1980-08-29 | 1980-08-29 | Adaptive quantization and encoding system for television signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5744384A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5986390A (en) * | 1982-11-08 | 1984-05-18 | Victor Co Of Japan Ltd | Digital data transmission system |
| EP0267581A2 (en) * | 1986-11-10 | 1988-05-18 | Kokusai Denshin Denwa Co., Ltd | Moving image signal coding system |
-
1980
- 1980-08-29 JP JP55120406A patent/JPS5744384A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5986390A (en) * | 1982-11-08 | 1984-05-18 | Victor Co Of Japan Ltd | Digital data transmission system |
| EP0267581A2 (en) * | 1986-11-10 | 1988-05-18 | Kokusai Denshin Denwa Co., Ltd | Moving image signal coding system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6340393B2 (en) | 1988-08-10 |
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