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KR940010791A - 적응적 가변길이 부호기 - Google Patents

적응적 가변길이 부호기 Download PDF

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Publication number
KR940010791A
KR940010791A KR1019920019746A KR920019746A KR940010791A KR 940010791 A KR940010791 A KR 940010791A KR 1019920019746 A KR1019920019746 A KR 1019920019746A KR 920019746 A KR920019746 A KR 920019746A KR 940010791 A KR940010791 A KR 940010791A
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KR1019920019746A
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KR0129558B1 (ko
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김상호
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배순훈
대우전자 주식회사
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Priority to KR1019920019746A priority Critical patent/KR0129558B1/ko
Priority to JP26761393A priority patent/JPH06225286A/ja
Priority to US08/143,175 priority patent/US5402244A/en
Publication of KR940010791A publication Critical patent/KR940010791A/ko
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Publication of KR0129558B1 publication Critical patent/KR0129558B1/ko

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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
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
    • 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
    • H04N19/18—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 a set of transform coefficients
    • 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
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • 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
    • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • 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
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • 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
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

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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)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)

Abstract

본 발명은 화면의 복잡도에 따라 밀접하게 변하는 양자화 스텝크기(qz)를 이용하여, 기설정된 여러가지 코드 테이블중 하나를 선택하여 가변길이 부호화(VLC)를 수행한다. 각각의 코드 테이블은 양자화기의 스텝 크기(qz)에 따라 컴퓨터 시뮬레이션을 통하여 최적화되며, 이 테이블은 가변길이 부호기 및 복호기의 롬(ROM)에 저장한다.

Description

적응적 가변길이 부호기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 영상 부호기 및 복호기의 블록도,
제2도는 제1도의 적응적 가변길이 부호기 및 복호기를 가진 영상 멀티플렉스 부호기 및 복호기의 상세 블록도,
제3도는 제2도에 도시된 가변길이 부호기 및 가변길이 복호기의 일예를 도시하는 도면,
제4도는 양자화 스텝 크기(qz)에 대하여 최적화된 가변길이 코드 테이블의 작성예를 도시하는 도면.

Claims (2)

  1. 영상신호를 변환 부호화하여 양자화한 후, 양자화된 2차원 변환계수를 주사하여 발생하는 1차원 데이타의 런과 레벨을 가변길이 부호화하는데 있어서, 양자화할 때 사용되는 양자화 스텝 크기(qz)를 다수개의 단계로 나누고 각각의 단계마다 다양하게 발생되는 런과 레벨의 빈도수에 최적하게 만들어진 다수개의 코드 테이블을 이용하여, 상기 양자화 스텝 크기(qz)에 따라서 입력되는 런과 레벨을 부호화하는 적응적 가변길이 부호화 방법.
  2. 영상신호를 변환 부호화하여 양자화한 후, 양자화된 2차원 변환 계수를 주사하여 발생하는 1차원 데이터의 런과 레벨을 가변길이 부호화하는데 있어서, 양자화할 때 사용되는 양자화 스텝 크기(qz)를 다수개의 단계로 나누고, 각 단계마다 다양하게 발생하는 런과 레벨의 빈도수에 따라 만들어진 다수개의 코드 테이블과, 상기 양자화 스텝 크기(qz)를 제어신호로 하여 입력되는 런과 레벨을 소정의 코드 테이블로 부호화할 수 있도록 하는 스위칭부를 포함하는 적응적 가변길이 부호화장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920019746A 1992-10-26 1992-10-26 적응적 가변길이 부호화 방법 및 장치 KR0129558B1 (ko)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019920019746A KR0129558B1 (ko) 1992-10-26 1992-10-26 적응적 가변길이 부호화 방법 및 장치
JP26761393A JPH06225286A (ja) 1992-10-26 1993-10-26 適応的可変長さ符号化方法および装置
US08/143,175 US5402244A (en) 1992-10-26 1993-10-26 Video signal transmission system with adaptive variable length coder/decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920019746A KR0129558B1 (ko) 1992-10-26 1992-10-26 적응적 가변길이 부호화 방법 및 장치

Publications (2)

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KR940010791A true KR940010791A (ko) 1994-05-26
KR0129558B1 KR0129558B1 (ko) 1998-04-10

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Publication number Publication date
JPH06225286A (ja) 1994-08-12
US5402244A (en) 1995-03-28
KR0129558B1 (ko) 1998-04-10

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