KR920011272A - 가변길이 부호화장치 - Google Patents

가변길이 부호화장치 Download PDF

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Publication number
KR920011272A
KR920011272A KR1019910020648A KR910020648A KR920011272A KR 920011272 A KR920011272 A KR 920011272A KR 1019910020648 A KR1019910020648 A KR 1019910020648A KR 910020648 A KR910020648 A KR 910020648A KR 920011272 A KR920011272 A KR 920011272A
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South Korea
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block
code
last
variable length
input signal
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KR1019910020648A
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English (en)
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KR950014511B1 (ko
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라쯔로 쥬리
마사카즈 니시노
히데끼 오오타카
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다니이 아끼오
마쯔시다덴기산교 가부시기가이샤
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Publication of KR920011272A publication Critical patent/KR920011272A/ko
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H03M5/02—Conversion to or from representation by pulses
    • H03M5/04—Conversion to or from representation by pulses the pulses having two levels
    • H03M5/14—Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
    • H03M5/145—Conversion to or from block codes or representations thereof
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • 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
    • 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
    • H04N19/60—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
    • H04N19/90—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)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

내용 없음

Description

가변길이 부호화장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 제1실시예를 도시한 블록도, 제2도는 본 발명의 제2실시예를 도시한 블록도.

Claims (6)

  1. 화상 또는 음성데이터를 블록화하고, 각 블록의 데이터를 가변길이부호화해서 전송 및/또는 기록할때에, 입력신호의 값이 양 또는 음인지의 여부를 표시하는 부호비트를 입력신호로부터 분리하는 부호분리수단과, 각 블록의 최후이외의 위치에서는 나타나지 않는 특정의 비트패턴을 가진 블록의 최후의 부호어의 최후의 비트에, 상기 부호분리수단에 의해 분리된 부호비트를 할당하는 수단을 구비한 것을 특징으로 하는 가변길이부호화장치.
  2. 제1항에 있어서, 상기 가변길이부호화는, 입력신호의 연속하는 0의 계수와 이 연속하는 0에 이어서 0이 아닌 진폭값의 양자를 1개 또는 2개의 부호어로 동시에 부호화하는 것임을 특징으로 하는 가변길이부호화장치.
  3. 화상 또는 음성데이터의 입력신호를 블록화하고 각 블록의 나머지 성분으로 부터 직류성분을 분리하는 변환수단과, 각 블록내의 데이터를 가변부호화해서 전송 및/또는 기록할때에, 입력신호로부터 이 입력신호의 값이 양 또는 음인지의 여부를 표시하는 부호비트를 분리하는 부호분리수단과, 각 블록의 최후이외의 위치에서는 나타나지 않는 특정의 비트패턴을 지닌 블록의 최후의 부호어의 최후의 비트에, 상기 부호분리수단에 의해 분리된 부호비트를 할당하여 블록의 최후의 부호어의 최후의 비트가 상기 블록의 직류성분에 관한 정보를 표시할 수 있도록 하는 수단을 구비한 것을 특징으로 하는 가변길이부호화장치.
  4. 제3항에 있어서, 상기 변화수단이 직교변화을 수행하는 것을 특징으로 하는 가변길이부호화장치.
  5. 제3항에 있어서, 블록의 최후의 부호어의 최후의 비트에 할당된 부호비트가 직류성분의 최하위비트인 것을 특징으로 하는 가변길이부호화장치.
  6. 제3항에 있어서, 상기 가변길이부호하는, 입력신호의 연속하는 0의 계수와 이 연속하는 0에 이어서 0이 아닌 진폭값의 양자를 1개 또는 2개의 부호화를 동시에 부호화하는 것임을 특징으로 하는 가변길이부호화장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019910020648A 1990-11-20 1991-11-20 가변길이 부호화장치 KR950014511B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2317230A JPH04185119A (ja) 1990-11-20 1990-11-20 可変長符号化装置
JP90-317230 1990-11-20

Publications (2)

Publication Number Publication Date
KR920011272A true KR920011272A (ko) 1992-06-27
KR950014511B1 KR950014511B1 (ko) 1995-12-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910020648A KR950014511B1 (ko) 1990-11-20 1991-11-20 가변길이 부호화장치

Country Status (4)

Country Link
US (1) US5166684A (ko)
EP (1) EP0487295A3 (ko)
JP (1) JPH04185119A (ko)
KR (1) KR950014511B1 (ko)

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CN1049309C (zh) * 1995-07-10 2000-02-09 联华电子股份有限公司 可变长度解码器的系数表缩减装置
NL1001171C2 (nl) * 1995-09-11 1997-03-13 United Microelectronics Corp Een codetabelreductie-inrichting voor variabele lengtedecoder.
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KR100490638B1 (ko) * 1998-03-02 2005-09-26 삼성전자주식회사 디지털오디오신호의무손실부호화를위한부호화및복호화시스템
JP2001016588A (ja) * 1999-06-28 2001-01-19 Toshikazu Akama 信号処理システム
US7596279B2 (en) * 2002-04-26 2009-09-29 Ntt Docomo, Inc. Image encoding device, image decoding device, image encoding method, image decoding method, image encoding program, and image decoding program
US7181674B2 (en) * 2002-06-28 2007-02-20 Sun Microsystems, Inc. Computer system including a network employing redundant information and slicing
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US7194137B2 (en) * 2003-05-16 2007-03-20 Cisco Technology, Inc. Variable length coding method and apparatus for video compression
US7499596B2 (en) * 2004-08-18 2009-03-03 Cisco Technology, Inc. Amplitude coding for clustered transform coefficients
US7454076B2 (en) * 2004-06-15 2008-11-18 Cisco Technology, Inc. Hybrid variable length coding method for low bit rate video coding
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Also Published As

Publication number Publication date
JPH04185119A (ja) 1992-07-02
KR950014511B1 (ko) 1995-12-02
EP0487295A2 (en) 1992-05-27
EP0487295A3 (en) 1992-11-25
US5166684A (en) 1992-11-24

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