JPS6422185A - High-efficiency encoder for image signal - Google Patents
High-efficiency encoder for image signalInfo
- Publication number
- JPS6422185A JPS6422185A JP17837587A JP17837587A JPS6422185A JP S6422185 A JPS6422185 A JP S6422185A JP 17837587 A JP17837587 A JP 17837587A JP 17837587 A JP17837587 A JP 17837587A JP S6422185 A JPS6422185 A JP S6422185A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- encoder
- supplied
- digital video
- video 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
Landscapes
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
PURPOSE:To keep the quantity of generating information constant in processing unit by providing a circuit for determining a threshold to generate a control code so that output data goes to be below a required rate. CONSTITUTION:To an input terminal 101, a digital video signal, for example, a signal in which the number of the quantization bits of one image element is 8 bits in a sampling frequency of 13.5 MHz is inputted. An input digital video signal is supplied to a subsampling encoder 102 and a field delaying circuit 103. The encoder 102 generates a prospective errorepsilon, and the errorepsilon is supplied to a threshold determining circuit 104. The circuit 104 generates the threshold in which output data do not exceed an aimed rate. The digital video signal through a circuit 103 is supplied to a subsampling encoder 105 and receives the processing of a variable density subsampling. The output data is obtained at an output terminal 28 of the encoder 105 and control data is obtained at an output terminal 29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17837587A JP2668881B2 (en) | 1987-07-17 | 1987-07-17 | High-efficiency coding device for image signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17837587A JP2668881B2 (en) | 1987-07-17 | 1987-07-17 | High-efficiency coding device for image signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6422185A true JPS6422185A (en) | 1989-01-25 |
| JP2668881B2 JP2668881B2 (en) | 1997-10-27 |
Family
ID=16047392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17837587A Expired - Lifetime JP2668881B2 (en) | 1987-07-17 | 1987-07-17 | High-efficiency coding device for image signals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2668881B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08169601A (en) * | 1994-09-06 | 1996-07-02 | Koenig & Bauer Albert Ag | Crimping roll to press running belt material |
| WO2000021298A1 (en) * | 1998-10-06 | 2000-04-13 | Sony Corporation | Encoding device and method, decoding device and method, and recording medium |
-
1987
- 1987-07-17 JP JP17837587A patent/JP2668881B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08169601A (en) * | 1994-09-06 | 1996-07-02 | Koenig & Bauer Albert Ag | Crimping roll to press running belt material |
| WO2000021298A1 (en) * | 1998-10-06 | 2000-04-13 | Sony Corporation | Encoding device and method, decoding device and method, and recording medium |
| US6996282B1 (en) | 1998-10-06 | 2006-02-07 | Sony Corporation | Encoding apparatus, encoding method, decoding apparatus, decoding method, and record medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2668881B2 (en) | 1997-10-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080704 Year of fee payment: 11 |