KR920011272A - 가변길이 부호화장치 - Google Patents
가변길이 부호화장치 Download PDFInfo
- 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
- Authority
- KR
- South Korea
- Prior art keywords
- block
- code
- last
- variable length
- input signal
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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
Landscapes
- 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
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 제1실시예를 도시한 블록도, 제2도는 본 발명의 제2실시예를 도시한 블록도.
Claims (6)
- 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.
- 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.
- 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.
- 제3항에 있어서, 상기 변화수단이 직교변화을 수행하는 것을 특징으로 하는 가변길이부호화장치.
- 제3항에 있어서, 블록의 최후의 부호어의 최후의 비트에 할당된 부호비트가 직류성분의 최하위비트인 것을 특징으로 하는 가변길이부호화장치.
- 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.
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
ID=18085929
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) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5561422A (en) * | 1994-05-16 | 1996-10-01 | Daewoo Electronics Co., Ltd. | Method and apparatus for variable length coding with reduced memory requirement |
US5502439A (en) * | 1994-05-16 | 1996-03-26 | The United States Of America As Represented By The United States Department Of Energy | Method for compression of binary data |
KR0164097B1 (ko) * | 1995-06-15 | 1999-01-15 | 조백제 | 병렬 입력 / 직렬 출력 장치 및 그 방법 |
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. |
US5663725A (en) * | 1995-11-08 | 1997-09-02 | Industrial Technology Research Institute | VLC decoder with sign bit masking |
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 |
JP3944225B2 (ja) * | 2002-04-26 | 2007-07-11 | 株式会社エヌ・ティ・ティ・ドコモ | 画像符号化装置、画像復号装置、画像符号化方法、画像復号方法、画像符号化プログラム及び画像復号プログラム |
US7181674B2 (en) * | 2002-06-28 | 2007-02-20 | Sun Microsystems, Inc. | Computer system including a network employing redundant information and slicing |
US7212681B1 (en) | 2003-01-15 | 2007-05-01 | Cisco Technology, Inc. | Extension of two-dimensional variable length coding for image compression |
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 |
US7471840B2 (en) * | 2004-08-18 | 2008-12-30 | Cisco Technology, Inc. | Two-dimensional variable length coding of runs of zero and non-zero transform coefficients for image compression |
US7454076B2 (en) * | 2004-06-15 | 2008-11-18 | Cisco Technology, Inc. | Hybrid variable length coding method for low bit rate video coding |
US7492956B2 (en) * | 2004-08-18 | 2009-02-17 | Cisco Technology, Inc. | Video coding using multi-dimensional amplitude coding and 2-D non-zero/zero cluster position coding |
US7499595B2 (en) * | 2004-08-18 | 2009-03-03 | Cisco Technology, Inc. | Joint amplitude and position coding for photographic image and video coding |
US7471841B2 (en) | 2004-06-15 | 2008-12-30 | Cisco Technology, Inc. | Adaptive breakpoint for hybrid variable length coding |
US7454073B2 (en) * | 2004-06-15 | 2008-11-18 | Cisco Technology, Inc. | Video compression using multiple variable length coding processes for multiple classes of transform coefficient blocks |
US7620258B2 (en) * | 2004-08-18 | 2009-11-17 | Cisco Technology, Inc. | Extended amplitude coding for clustered transform coefficients |
US7680349B2 (en) | 2004-08-18 | 2010-03-16 | Cisco Technology, Inc. | Variable length coding for clustered transform coefficients in video compression |
US7242328B1 (en) * | 2006-02-03 | 2007-07-10 | Cisco Technology, Inc. | Variable length coding for sparse coefficients |
US8772412B2 (en) | 2010-12-29 | 2014-07-08 | Industrial Technology Research Institute | Meta-stable state nitrogen-containing polymer |
US8767824B2 (en) | 2011-07-11 | 2014-07-01 | Sharp Kabushiki Kaisha | Video decoder parallelization for tiles |
CN109639608B (zh) * | 2018-12-18 | 2020-08-11 | 深圳市华星光电技术有限公司 | 数据编码的方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4568916A (en) * | 1983-11-14 | 1986-02-04 | Bahgat Osama A E H | Variable word length encoder |
US4675650A (en) * | 1985-04-22 | 1987-06-23 | Ibm Corporation | Run-length limited code without DC level |
ATE108587T1 (de) * | 1986-09-13 | 1994-07-15 | Philips Nv | Verfahren und schaltungsanordung zur bitratenreduktion. |
US4698672A (en) * | 1986-10-27 | 1987-10-06 | Compression Labs, Inc. | Coding system for reducing redundancy |
US4939583A (en) * | 1987-09-07 | 1990-07-03 | Hitachi, Ltd. | Entropy-coding system |
NL8802291A (nl) * | 1988-09-16 | 1990-04-17 | Koninkl Philips Electronics Nv | Inrichting voor het verzenden van datawoorden welke een gedigitaliseerde analoog signaal vertegenwoordigen en een inrichting voor het ontvangen van de verzonden datawoorden. |
-
1990
- 1990-11-20 JP JP2317230A patent/JPH04185119A/ja active Pending
-
1991
- 1991-11-19 EP EP19910310640 patent/EP0487295A3/en not_active Withdrawn
- 1991-11-19 US US07/794,216 patent/US5166684A/en not_active Expired - Fee Related
- 1991-11-20 KR KR1019910020648A patent/KR950014511B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US5166684A (en) | 1992-11-24 |
EP0487295A3 (en) | 1992-11-25 |
JPH04185119A (ja) | 1992-07-02 |
EP0487295A2 (en) | 1992-05-27 |
KR950014511B1 (ko) | 1995-12-02 |
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