KR960019243A - Variable length decoding apparatus and method of digital video cassette recorder - Google Patents

Variable length decoding apparatus and method of digital video cassette recorder Download PDF

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Publication number
KR960019243A
KR960019243A KR1019940031737A KR19940031737A KR960019243A KR 960019243 A KR960019243 A KR 960019243A KR 1019940031737 A KR1019940031737 A KR 1019940031737A KR 19940031737 A KR19940031737 A KR 19940031737A KR 960019243 A KR960019243 A KR 960019243A
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KR
South Korea
Prior art keywords
data
variable length
segment
length
shift
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KR1019940031737A
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Korean (ko)
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KR0171443B1 (en
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남태우
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김광호
삼성전자 주식회사
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Priority to KR1019940031737A priority Critical patent/KR0171443B1/en
Publication of KR960019243A publication Critical patent/KR960019243A/en
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    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

디지탈 비디오 카세트 레코더의 가변장 복호화 장치에 관한 것으로, 특히 가변장 부호를 복수의 비트로 병렬 처리하여 데이타 경로를 단일화하여 복호화하는 기술이다.The present invention relates to a variable length decoding apparatus of a digital video cassette recorder, and more particularly, to a technique of unifying and decoding a data path by processing a variable length code in parallel with a plurality of bits.

2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention

복호화 장치에서 영상신호를 비트 단위 처리를 한다면 처리 속도가 재생 데이타의 입력 속도를 따르지 못하여 동일한 기능을 수행하는 복수의 복호화기를 만들어 병렬로 처리한 후 다시 직렬형태 데이타로 배열하여야 하므로 시스템이 복잡해지고, 또한 시스템의 부피가 커지는 문제를 해결한다.When the decoding apparatus processes the video signal bit by bit, the system becomes complicated because the processing speed does not follow the input speed of the reproduction data, and a plurality of decoders having the same function must be made and processed in parallel, and then arranged in serial data again. It also solves the problem of bulky system.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

가변장부호화된 데이타를 세그먼트단위로 조합하여 저장하고, 상기 세그먼트단위의 데이타를 읽어들인 후, 코드 길이를 검출하여 데이타가 시프트비트수를 결정하여 시프트처리하며, 상기 쉬프트 처리된 데이타가 출력될 때마다 유효 데이타 값을 출력되는 코드에 해당하는 길이만큼 감산하고, 상기 유효 데이타를 검사하여 설정값보다 작아질 시 상기 세그먼트단위로 조합된 데이타를 읽어들여 시프트시키며, 상기 시프트된 데이타를 코드워드 길이에 따라 윈도우를 씌워 입력된 코드워드를 가변장 테이블과 비교하여 run, amp 데이타를 생성한다.When the variable length coded data is stored in combination by segment, and after reading the data in the segment, the code length is detected to shift the data by determining the number of shift bits, and when the shifted data is output. Each valid data value is subtracted by the length corresponding to the output code, and the valid data is examined and read and shifted by combining the data in the segment unit when the valid data is smaller than the set value. Therefore, the codeword inputted by the window is compared with the variable length table to generate run and amp data.

4. 발명의 중요한 용도4. Important uses of the invention

디지탈 비디오 카세트 레코더의 복호화 장치에 사용한다.Used for decoding device of digital video cassette recorder.

Description

디지탈 비디오 카세트 레코더의 가변장 복호화 장치 및 방법Variable length decoding apparatus and method of digital video cassette recorder

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 일반적인 가변장 복호화 장치의 블럭 구성도,1 is a block diagram of a general variable length decoding apparatus;

제2도는 본 발명에 따른 가변장 복호화 장치의 블럭 구성도,2 is a block diagram of a variable length decoding apparatus according to the present invention;

제3도는 본 발명에 따른 메모리맵 구성도.3 is a memory map configuration diagram according to the present invention.

Claims (3)

프레임 단위로 영상신호를 저장하는 프레임 메모리와, 세그먼트 단위로 영상신호를 저장하는 세그먼트 메모리를 구비한 디지탈 비디오 카세트 레코더의 가변장 복호화 장치에 있어서, 상기 프레임 메모리에 연결되며, 가변장 부호화를 위해 화면상에서 인접하지 않은 마크로블럭을 세그먼트로 만들 때와 같은 규칙으로 상기 프레임 메모리에서 불연속적으로 저장되어 있는 데이타들을 세그먼트 단위로 조합하여 상기 세그먼트 메모리에 저장하는 세그먼트 조합부와, 상기 세그먼트 메모리에서 데이타를 읽어들여 코드의 길이를 검출하여 데이타가 몇 비트 시프트되어야 하는가를 결정하고, 그 값에 따라 시프트를 제어하는 데이타 제어부와, 상기 데이타 제어부의 제어에 의해 잔류데이타와 유효데이타를 저장하는 잔류데이타 메모리와, 상기 데이타 제어부로부터 출력되는 신호를 임의의 길이로 시프트할 수 있는 배럴 시프트의 기능에 병렬 로드가 가능하게 구성하는 데이타 시프트와, 상기 데이타 시프트로부터 시프트된 데이타의 코드 워드의 길이에 따라 별도의 윈도우를 씌워 입력된 코드 워드를 가변장 부호 테이블과 비교하여 해당하는 run, amp 데이타를 얻기 위한 run, amp 데이타 생성부로 구성함을 특징으로 하는 가변장 복호화장치.A variable length decoding apparatus of a digital video cassette recorder having a frame memory for storing a video signal in a frame unit and a segment memory for storing a video signal in a segment unit, the variable length decoding apparatus being connected to the frame memory and displaying a screen for variable length encoding. A segment combination unit which combines discontinuously stored data in the frame memory in segment units and stores the data in the segment memory according to the same rules as when segmenting non-contiguous macroblocks in the segment; A data control unit for detecting the length of the code, determining how many bits the data should be shifted, and controlling the shift according to the value, a residual data memory for storing the residual data and the valid data under the control of the data control unit; The data Barrel shift function which can shift the signal output from fisherman to arbitrary length, and the data shift which constitutes parallel load is possible, and inputs with a separate window according to the codeword length of the data shifted from the said data shift. And a run and amp data generator for comparing the codeword with the variable length code table to obtain corresponding run and amp data. 디지탈 비디오 카세트 레코더의 가변장 복호화 방법에 있어서, 가변장부호화된 데이타를 세그먼트단위로 조합하여 저장하는 과정과, 상기 세그먼트단위의 데이타를 읽어들인 후, 코드 길이를 검출하여 데이타가 시프트비트수를 결정하여 시프트처리하는 과정과, 상기 쉬프트 처리된 데이타가 출력될 때마다 유효 데이타 값을 출력되는 코드에 해당하는 길이만큼 감산하는 과정과, 상기 유효 데이타를 감사하여 설정값보다 작아질 시 상기 세그먼트단위로 조합된 데이타를 읽어들여 시프트시키는 과정과, 상기 시프트된 데이타를 코드워드 길이에 따라 윈도우를 씌워 입력된 코드워드를 가변장 테이블과 비교하여 run, amp 데이타를 생성하는 과정으로 이루어짐을 특징으로 하는 가변장 복호화방법.In a variable length decoding method of a digital video cassette recorder, a method of storing variable length coded data in a segment unit, storing the data in the segment unit, and detecting a code length to determine the number of shift bits. Performing a shift process, subtracting a valid data value by a length corresponding to an output code each time the shifted data is output, and auditing the valid data in the segment unit when it becomes smaller than a set value. And a step of reading and shifting the combined data, and generating run and amp data by comparing the shifted data with a variable length table by covering a window according to the codeword length. Chapter Decryption method. 제2항에 있어서, 상기 코드길이 검출은, 상기 부호화된 데이타를 코드워드 길이에 관계없이 상기 시프트된 데이타 값과 비교하여 검출함을 특징으로 하는 가변장 복호화방법.The variable length decoding method of claim 2, wherein the code length detection is performed by comparing the coded data with the shifted data value regardless of a codeword length. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940031737A 1994-11-29 1994-11-29 Apparatus and method of variable length code decoding of digital video cassette recorder KR0171443B1 (en)

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KR0171443B1 KR0171443B1 (en) 1999-04-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100271446B1 (en) * 1997-12-12 2000-11-15 전주범 Variable length encoding and deformatting device of a dvcr

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000042558A (en) * 1998-12-26 2000-07-15 전주범 Device for deformatting dvcr

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100271446B1 (en) * 1997-12-12 2000-11-15 전주범 Variable length encoding and deformatting device of a dvcr

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