KR970009378A - Adaptive Short Code Encoder - Google Patents

Adaptive Short Code Encoder Download PDF

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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
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KR
South Korea
Prior art keywords
block
dispersion
predetermined
condensation
output
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Application number
KR1019950021448A
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Korean (ko)
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KR0180165B1 (en
Inventor
윤성욱
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배순훈
대우전자 주식회사
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Priority to KR1019950021448A priority Critical patent/KR0180165B1/en
Publication of KR970009378A publication Critical patent/KR970009378A/en
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Publication of KR0180165B1 publication Critical patent/KR0180165B1/en

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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
    • 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

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  • 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

적응 간축부호기Adaptive Short Code Encoder

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)

영상 데이타를 소정의 블럭으로 형성한 후 상기 블럭의 분산도에 따라 소정의 간축율로 간축한 후 부호화하는 영상부호화장치에 있어서, 필터링된 영상입력에서 소정의 블럭을 추출하는 블럭 추출기(22); 상기 추출된 블럭을 서로 다른 간축율로 각각 간축하는 다운 샘플러(24-1~24-3); 상기 추출된 블럭의 분산치를 계산한 후 소정의 기준치와 비교하여 선택신호를 발생하는 분산 계산부(23); 상기 분산계산부(23)의 출력에 따라 상기 다운 샘플러의 출력 중 하나를 선택하는 선택수단(25); 및 상기 선택수단(25)의 출력을 양자화하는 양자화기(26)가 구비되는 적응 간축부호기.An image encoding apparatus for forming image data into predetermined blocks, and then compressing the encoded image data into predetermined blocks according to the dispersion degree of the block, the encoding method comprising: 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 reduction 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; Selecting means (25) for selecting one of the outputs of the down sampler according to the output of the dispersion calculating section (23); And a quantizer (26) for quantizing the output of said selection means (25). 제1항에 있어서, 상기 적응 간축부호기는 계산된 분산치가 높으면 간축율을 낮게 하여 많은 데이타를 부호화하여 전송하고, 분산치가 낮으면 간축율을 높게 하여 가능한한 적은 데이타를 부호화하므로써 압축율을 향상시키도록 한 것을 특징으로 하는 적응 간축부호기.The method of claim 1, wherein the adaptive condensation encoder encodes and transmits a large amount of data by lowering the condensation rate when the calculated variance value is high, and improves the compression rate by encoding as little data as possible by increasing the condensation rate when the variance value is low. Adaptive condensation encoder characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950021448A 1995-07-20 1995-07-20 An adaptive decimation encoder KR0180165B1 (en)

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

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KR1019950021448A KR0180165B1 (en) 1995-07-20 1995-07-20 An adaptive decimation encoder

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Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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