TW364250B - Two-way image compression method - Google Patents
Two-way image compression methodInfo
- Publication number
- TW364250B TW364250B TW086119808A TW86119808A TW364250B TW 364250 B TW364250 B TW 364250B TW 086119808 A TW086119808 A TW 086119808A TW 86119808 A TW86119808 A TW 86119808A TW 364250 B TW364250 B TW 364250B
- Authority
- TW
- Taiwan
- Prior art keywords
- compression
- horizontal
- calculation
- vertical direction
- horizontal direction
- Prior art date
Links
Landscapes
- Compression Of Band Width Or Redundancy In Fax (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
A two-way image compression method which stresses full consideration and analysis of the intrinsic ordered pixel distribution characteristics of the picture as lacking in conventional compression process to enhance compression efficiency, comprising the steps of: (i) with a byte as an image unit, queue data packets are formed in the horizontal and vertical directions respectively; (ii) then, using a compression calculation, said queue data packets are compressed respectively; (iii) the array compression rates in the horizontal and vertical directions are compared; if the rate in the horizontal direction is larger than that in the vertical direction, next step is carried out; (iv) selecting the compression result in the horizontal direction as that of this compression calculation, meanwhile recording the compression data size and the horizontal direction as the compression direction, then the operation is finished; (v) in the above step (iii), the array compression rates in the horizontal and vertical directions are compared; if the rate in the horizontal direction is smaller than that in the vertical direction, then next step is carried out; (6) selecting the compression result in the vertical direction as that of this compression calculation, meanwhile recording the compression data size and the vertical direction as the compression direction, then the operation is finished. The compression calculation used in this invention is based on the customary LZ compression calculation, plus expanded coding part and incorporating the repeated address operation, characterized by: (1) in the aspect of byte repeated processing, the constraint on compression window is relieved, where the compression code can contain 64K repeated bytes at maximum; (2) in the aspect of data block matching interval, there is a breakthrough in the limit on compression window interval where whole-region compression is carried out and maximum data block forward test space can reach the size of 256 x 4K; (3) in the aspect of data block matching length, there is a breakthrough in the limit on compression window, where compression code can accommodate 64K matching bytes at maximum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW086119808A TW364250B (en) | 1997-12-26 | 1997-12-26 | Two-way image compression method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW086119808A TW364250B (en) | 1997-12-26 | 1997-12-26 | Two-way image compression method |
Publications (1)
Publication Number | Publication Date |
---|---|
TW364250B true TW364250B (en) | 1999-07-11 |
Family
ID=57940973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW086119808A TW364250B (en) | 1997-12-26 | 1997-12-26 | Two-way image compression method |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW364250B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100377247C (en) * | 2003-10-31 | 2008-03-26 | 浙江中控技术股份有限公司 | Real-time data on-line compression and decompression method |
-
1997
- 1997-12-26 TW TW086119808A patent/TW364250B/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100377247C (en) * | 2003-10-31 | 2008-03-26 | 浙江中控技术股份有限公司 | Real-time data on-line compression and decompression method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0528642B1 (en) | Data stream generator | |
US5136659A (en) | Intelligent coding system for picture signal | |
CN1669233B (en) | Video compression system | |
CN1110958C (en) | Decompression process for video signal | |
CN1110965C (en) | Method and apparatus for efficient addressing of dram in a video decompression processor | |
US5329313A (en) | Method and apparatus for real time compression and decompression of a digital motion video signal using a fixed Huffman table | |
MX354997B (en) | Adaptive weighting of reference pictures in video encoding. | |
MY140733A (en) | Adaptive weighting of reference pictures in video decoding | |
AU1253101A (en) | Data compression | |
US6457057B1 (en) | System for displaying a plurality of pictures and apparatuses incorporating the same | |
CA2305572A1 (en) | System and method for fixed-rate block-based image compression with inferred pixel values | |
CA1333502C (en) | Signal coding | |
CN1125031A (en) | Adaptive video compression using variable quantization | |
US20030177255A1 (en) | Encoding and decoding system for transmitting streaming video data to wireless computing devices | |
US5600375A (en) | Rendering an inter verses intra video encoding decision based upon a vertical gradient measure of target video frames | |
EP2535871A3 (en) | Video-information decoding apparatus and method | |
CA2178943A1 (en) | Method and Device for Determining Bit Allocation in a Video Compression System | |
CN1065702C (en) | Adaptive video decompression | |
EP0334524A3 (en) | Crossbar converter | |
JP2829954B2 (en) | Apparatus and method for highly efficient encoding of image signal | |
CN1758722A (en) | Method for switching channel and decoding system for display image | |
CA2157066A1 (en) | Method for Controlling a Compressed Data Buffer | |
JPH09327019A (en) | Object area encoding device | |
TW364250B (en) | Two-way image compression method | |
EP0988705A2 (en) | Method and apparatus for data compression |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |