KR930024509A - 가변장 부호 복호기 - Google Patents

가변장 부호 복호기 Download PDF

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Publication number
KR930024509A
KR930024509A KR1019920008454A KR920008454A KR930024509A KR 930024509 A KR930024509 A KR 930024509A KR 1019920008454 A KR1019920008454 A KR 1019920008454A KR 920008454 A KR920008454 A KR 920008454A KR 930024509 A KR930024509 A KR 930024509A
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KR
South Korea
Prior art keywords
data
variable length
decoder
unpacker
calculator
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KR1019920008454A
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English (en)
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KR950004129B1 (ko
Inventor
이흥순
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이헌조
주식회사 금성사
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Priority to KR1019920008454A priority Critical patent/KR950004129B1/ko
Priority to US08/061,667 priority patent/US5414468A/en
Publication of KR930024509A publication Critical patent/KR930024509A/ko
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Publication of KR950004129B1 publication Critical patent/KR950004129B1/ko

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/42—Flyback transformers
    • 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
    • H03M7/425—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 for the decoding process only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/525—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • 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
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Color Television Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

본 발명은 가변장 부호 복호기에 관한 것으로, 일반적으로 입력 데이타 열의 구성은 Y와 C의 계수 및 매크로블록의 특성을 나타내는 코드들이 시간 분할 압축되어 있으므로 이 데이타들을 복호해야 되는 가변장 부호 복호기는 픽셀 클럭보다 더 빠른 속도로 동작되어야 한다.
그런데, 보통의HDTV의 픽셀 클럭은 60MHZ이상인데 이 속도 이상으로 처리하기 위한 소자들이 아직 가능하지 않으므로, 데이타 생성량을 슬라이스 단위로 조정하고 있는 엔코딩 알고리즘을 이용하여 DCT계수의 발생을 데이타를 1슬라이스분 저장해놓고 계수발생을 시작함으로써 저속의 가변장 복호처리가 가능하도록 구성한 것이다.

Description

가변장 부호 복호기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명 가변장 부호 복호기의 구성도, 제2도는 제1도에서 코드의 길이에 따른 언팩커, 배럴 쉬프터, 언팩커 제어부의 출력 관계도.

Claims (1)

  1. 복호기의 시작점을 찾을 수 있도록 입력 데이타를 정렬 시켜주는 이니셜라이져(2)와, 엔코더측에서 생기는 지연 시간을 보정하는 버퍼(3)와, 32비트의 데이타 2개를 묶어서 출력하는 언팩커(4)와, 64비트의 입력에서 한번에 0~31비트를 쉬프트시키는 배럴 쉬프터(5)와, 가변장 부호의 길이에 쉬프트양을 누적시켜 가면서 필요에 따라 버퍼로 부터의 새로운 데이타를 상기 언팩커(4)에 입력시키는 언팩커제어부(7)와, 각각의 가변장 부호의 복호테이블을 가지고 있는 디코더(8~21)와, 각 가변장 길이를 가지고 있는 길이 디코더(13)와, DPCM으로 전송된 코드를 원래의 데이타로 바꾸어주는 MV계산부(14), YDC계산부(16)및 CDC계산부(17), RLC디코더(10)로 부터의 복호 데이타에서 나머지 부족한 블록데이타를 만들어 주는 엑스트라 런 레벨 발생기(15)와, DC계수와 AC계수를 서로 혼합시켜주는 멀티플렉서(21,22)와, 각각의 블록에 해당하는 데이타를 저장하는 버퍼(23~28)와, 상기 버퍼(23~28)의 데이타를 이동하여 이산 코싸인 변환 계수를 발생시키는 계수발생기(29~34)와, 프레임, 슬라이스, 매크로 블록단위로 데이타를 저장하는 버퍼(18~20)와, 이 복호동작을 시작하는 시점을 찾는 시작코드 디코더(35)와, 상기의 모든 복호동작을 제어하는 제어부(36)를 포함하여 구성한 것을 특징으로 하는 가변장부호 복호기.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920008454A 1992-05-19 1992-05-19 가변장 부호 복호기 KR950004129B1 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019920008454A KR950004129B1 (ko) 1992-05-19 1992-05-19 가변장 부호 복호기
US08/061,667 US5414468A (en) 1992-05-19 1993-05-14 Apparatus for decoding variable length codes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920008454A KR950004129B1 (ko) 1992-05-19 1992-05-19 가변장 부호 복호기

Publications (2)

Publication Number Publication Date
KR930024509A true KR930024509A (ko) 1993-12-22
KR950004129B1 KR950004129B1 (ko) 1995-04-25

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KR1019920008454A KR950004129B1 (ko) 1992-05-19 1992-05-19 가변장 부호 복호기

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KR (1) KR950004129B1 (ko)

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JP2862064B2 (ja) * 1993-10-29 1999-02-24 三菱電機株式会社 データ復号装置及びデータ受信装置及びデータ受信方法
KR970006633B1 (ko) * 1993-12-29 1997-04-29 현대전자산업 주식회사 가변길이 복호기용 데이타 출력장치
KR0148153B1 (ko) * 1994-05-31 1998-09-15 김광호 비트스터핑 제거장치
JP3450553B2 (ja) * 1995-10-31 2003-09-29 東芝マイクロエレクトロニクス株式会社 可変長符号復号装置
FR2743248B1 (fr) * 1995-12-29 1998-03-20 Sgs Thomson Microelectronics Dispositif de demultiplexage d'informations codees selon une norme mpeg
FR2743969B1 (fr) * 1996-01-19 1998-04-10 Sgs Thomson Microelectronics Dispositif d'extraction de paramaetres de decodage d'un flux de donnees video codees selon une norme mpeg
KR100215439B1 (ko) * 1996-02-08 1999-08-16 윤종용 고속의 데이타 구문분석 제어회로
US6008745A (en) * 1998-02-17 1999-12-28 Sun Microsystems, Inc. Variable length decoding using lookup tables
CN1245839C (zh) * 2001-07-04 2006-03-15 矽统科技股份有限公司 分散式视频数据流解码方法
US20050036555A1 (en) * 2003-08-13 2005-02-17 Lakshmanan Ramakrishnan Automatic direct memory access engine
US8250618B2 (en) * 2006-09-18 2012-08-21 Elemental Technologies, Inc. Real-time network adaptive digital video encoding/decoding
US8184715B1 (en) 2007-08-09 2012-05-22 Elemental Technologies, Inc. Method for efficiently executing video encoding operations on stream processor architectures
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CN103056211B (zh) * 2013-01-29 2015-07-22 广州市康尼斯自动化有限公司 连续送料高速冲压机构的控制系统和控制方法

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US5414468A (en) 1995-05-09
KR950004129B1 (ko) 1995-04-25

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