KR970009378A - Adaptive Short Code Encoder - Google Patents
Adaptive Short Code Encoder Download PDFInfo
- Publication number
- KR970009378A KR970009378A KR1019950021448A KR19950021448A KR970009378A KR 970009378 A KR970009378 A KR 970009378A KR 1019950021448 A KR1019950021448 A KR 1019950021448A KR 19950021448 A KR19950021448 A KR 19950021448A KR 970009378 A KR970009378 A KR 970009378A
- Authority
- KR
- South Korea
- Prior art keywords
- block
- dispersion
- predetermined
- condensation
- output
- Prior art date
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Classifications
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- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/117—Filters, e.g. for pre-processing or post-processing
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
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- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
-
- 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
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
- H04N19/86—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
본 발명에 따른 적응 간축 부호기는 입력영상을 필터링하는 필터(21)와; 필터링된 영상입력에서 소정의 블럭을 추출하는블럭 추출기(22); 상기 추출된 블럭을 서로 다른 간측율로 각각 간축하는 다운 샘플러(24-1~24-3); 상기 추출된 블럭의분산치를 계산한 후 소정의 기준치와 비교하여 선택신호를 발생하는 분산 계산부(23); 상기 분산 계산부(23)의 출력에 따라 상기 다운 샘플러의 출력 중 하나를 선택하는 선택부(25); 및 상기 선택부(25)의 출력을 양자화하는 양자화기(26)로구성되어 입력된 영상블럭의 분산특성에 따라 간축율을 달리 하므로써 압축효율을 향상시킬 수 있는 효과가 있다.The adaptive short coder according to the present invention includes: a filter 21 for filtering an input image; A block extractor 22 for extracting a predetermined block from the filtered image input; Down samplers 24-1 to 24-3 each shortening the extracted blocks at different interrogation rates; A dispersion calculator 23 for calculating a dispersion value of the extracted block and generating a selection signal by comparing with a predetermined reference value; A selection unit 25 for selecting one of the outputs of the down sampler according to the output of the dispersion calculation unit 23; And a quantizer 26 that quantizes the output of the selector 25, thereby improving compression efficiency by varying the reduction ratio according to the dispersion characteristics of the input image block.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제2도는 본 발명에 따른 간축 부호기를 도시한 블럭도.2 is a block diagram showing a shortened encoder according to the present invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950021448A KR0180165B1 (en) | 1995-07-20 | 1995-07-20 | An adaptive decimation encoder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950021448A KR0180165B1 (en) | 1995-07-20 | 1995-07-20 | An adaptive decimation encoder |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970009378A true KR970009378A (en) | 1997-02-24 |
KR0180165B1 KR0180165B1 (en) | 1999-05-01 |
Family
ID=19421099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950021448A KR0180165B1 (en) | 1995-07-20 | 1995-07-20 | An adaptive decimation encoder |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0180165B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8422810B2 (en) | 2005-07-20 | 2013-04-16 | Electronics And Telecommunications Research Institute | Method of redundant picture coding using polyphase downsampling and the codec using the method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007032597A1 (en) * | 2005-07-20 | 2007-03-22 | Electronics And Telecommunications Research Institute | Method of redundant picture coding using polyphase downsampling and the codec using the same |
-
1995
- 1995-07-20 KR KR1019950021448A patent/KR0180165B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8422810B2 (en) | 2005-07-20 | 2013-04-16 | Electronics And Telecommunications Research Institute | Method of redundant picture coding using polyphase downsampling and the codec using the method |
Also Published As
Publication number | Publication date |
---|---|
KR0180165B1 (en) | 1999-05-01 |
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