KR960003415A - Prediction State of DC Transform Coefficient of Intra Component in Image Decoding System - Google Patents

Prediction State of DC Transform Coefficient of Intra Component in Image Decoding System Download PDF

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KR960003415A
KR960003415A KR1019940015364A KR19940015364A KR960003415A KR 960003415 A KR960003415 A KR 960003415A KR 1019940015364 A KR1019940015364 A KR 1019940015364A KR 19940015364 A KR19940015364 A KR 19940015364A KR 960003415 A KR960003415 A KR 960003415A
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South Korea
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conversion coefficient
write
block
transmitted
length decoder
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KR1019940015364A
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Korean (ko)
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KR0129583B1 (en
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강동수
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배순훈
대우전자 주식회사
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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
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/004—Predictors, e.g. intraframe, interframe coding

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  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

본 발명은 영상복호화기 시스템에 있어서 간단한 하드웨어 구조로 가변길이복호화기로부터 역이산여현변환기로 전송되는 신호에서 인트라 프레임에 대한 DC변환계수를 예측하기 위한 인트라 프레임의 DC변환계수 예측장치에 관한 것이다. 이를 위하여 본 장치는 인트라 프레임에 대한 소정 블록 단위의 휘도신호와 색신호 각각에 대한 이전 블록의 예측된 직류변환계수를 별도로 저장하는 레지스터부 ; 가변길이복호화기로부터 전송되는 인트라 프레임의 직류변환계수의 로드제어신호(id_dc)와 블록인텍스신호(blk_index)에 의해 레지스터부의 읽기 모드를 제어하고, 인가되는 쓰기모드제어신호(write)와 블록인텍스신호에 의해 레지스터부의 쓰기모드를 제어하는 읽기/쓰기제어부;가변길이복호화기로 부터 전송되는 로드제어신호(id＿dc)에 동기되어 가변길이복호화기로 부터 전송되는 직류변환계수에 대한 사이즈데이터(dct＿dc＿size)와 차분값(dct＿dc＿diff)을 MPEG-2 표준규격에 따라 연산처리하여 현재 블록과 인접한 블록간의 직류변환계수의 차이값(diff)을 계산하기 위한 차분계산기 ; 레지스터부의 읽기모드 수행으로 출력되는 이전의 예측된 직류변환계수와 차분계산기로 부터 출력되는 차이값(diff)을 가산한 값을 현재 블록의 예측된 직류변환계수로하여 역이산여현변환처리수단과 레지스터부로 각각 출력함과 동시에 읽기/쓰기제어부로 쓰기모드제어신호를 액티브상태로 제공하는 가산기를 포함하도록 구성된다.The present invention relates to an apparatus for predicting a DC transform coefficient of an intra frame for predicting a DC transform coefficient for an intra frame in a signal transmitted from a variable length decoder to an inverse discrete cosine transformer in a simple hardware structure. To this end, the apparatus includes a register unit for separately storing the predicted DC conversion coefficient of the previous block for each of the luminance signal and the color signal of the predetermined block unit for the intra frame; The read mode of the register part is controlled by the load control signal id_dc and the block index signal blk_index of the DC conversion coefficient of the intra frame transmitted from the variable length decoder, and the write mode control signal write and the block index signal are applied. A read / write control unit for controlling the write mode of the register unit by means of the size data (dct_dc_size) and the differential value of the DC conversion coefficient transmitted from the variable-length decoder in synchronization with the load control signal (id_dc) transmitted from the variable-length decoder. a difference calculator for calculating a difference value (diff) of a DC conversion coefficient between a current block and an adjacent block by calculating (dct＿dc＿diff) according to the MPEG-2 standard; Inverse discrete cosine conversion processing means and register by adding the previously predicted DC conversion coefficient output from the register part read mode and the difference (diff) output from the difference calculator as the estimated DC conversion coefficient of the current block. And an adder for outputting each to a negative portion and simultaneously providing a write mode control signal to a read / write control unit in an active state.

Description

영상복호화 시스템에 있어서 인트라성분의 디씨변환계수 예측상태Prediction State of DC Transform Coefficient of Intra Component in Image Decoding System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제 1도는 본 발명에 따른 인트라프레임의 직류변환계수 예측장치의 블록도.1 is a block diagram of an apparatus for predicting DC conversion coefficient of an intra frame according to the present invention.

Claims (1)

부호화된 데이터가 인가되면 가변길이 복호화기 위한 가변길이 복호화기와 상기 가변길이 복호화기로부터 전송된 데이터를 역이산여현변환처리를 하는 역이산여현변환처리수단이 구비된 영상복호화시스템에서 인트라 프레임에 대한 복호화된 정보가 상기 역이산여현변환처리수단으로 전송되기전에 상기 인트라 프레임에 대한 소정 블록단위의 직류(DC)변환계수를 예측하기 위한 장치에 있어서:상기 인트라 프레임에 대한 소정 블록단위의 휘도신호와 색신호 각각에 대한 이전 블록의 예측된 직류변환계수를 별도로 저장하는 레지스터부:상기 가변길이복호화기로부터 전송하는 상기 인트라 프레임의 직류변환계수의 로드제어신호(id_dc)에 의해 구동되어 상기 가변길이 복호화기로부터 전송되는 불록인텍스신호(blk_index)에 대응되는 위치에 저장되어 있는 직류변환계수가 상기 레지스터부로부터 읽혀질 수 있도록 상기 레지스터부의 읽기모드를 제어하고, 인가되는 쓰기모드제어신호(write)에 의해 구동되어 상기 블록인텍스신호에 대응되는 상기 레지스터부의 위치에 현재 예측된 직류변환계수가 쓰여지도록 상기 레지스터부의 쓰기모드를 제어하는 읽기/쓰기제어부;상기 가변길이복호화기로 부터 전송되는 상기 로드제어신호(id＿dc)에 동기되어 상기 가변길이복호화기로 부터 전송되는 상기 직류변환계수에 대한 사이즈데이터(dct＿dc＿size)와 차분값(dct＿dc＿diff)을 MPEG-2 표준규격에 따라 연산처리하여 현재 블록과 인접한 블록간의 직류변환계수의 차이값(diff)을 계산하기 위한 차분계산기 ; 상기 레지스터부의 상기 읽기모드 수행으로 출력되는 이전의 예측된 직류변환계수와 상기 차분계산기로 부터 출력되는 상기 차이값(diff)을 가산한 값을 현재 블록의 예측된 직류변환계수로하여 상기 역이산여현변환처리수단과 상기 레지스터부로 각각 출력함과 동시에 상기 읽기/쓰기제어부로 상기 쓰기모드제어신호를 액티브상태로 제공하는 가산기를 포함하는 것을 특징으로 하는 인트라 프레임의 직류변환계수 예측장치.When encoded data is applied, intraframe decoding is performed in a video decoding system including a variable length decoder for variable length decoding and an inverse discrete cosine transform processing means for inverse discrete cosine transforming the data transmitted from the variable length decoder. An apparatus for predicting a direct current (DC) conversion coefficient in a predetermined block unit for an intra frame before the received information is transmitted to the inverse discrete cosine transform processing means. A luminance signal and a color signal in a predetermined block unit for the intra frame. A register unit for separately storing the predicted DC conversion coefficients of the previous block for each of: a load control signal (id_dc) of the DC conversion coefficient of the intra frame transmitted from the variable length decoder to drive from the variable length decoder Stored in the position corresponding to the transmitted block index signal blk_index. A direct current conversion coefficient which controls the read mode of the register section so that the direct current conversion coefficient can be read from the register section, and is driven by an applied write mode control signal (write) to predict the current position at the position of the register section corresponding to the block index signal. A read / write control unit for controlling a write mode of the register unit to write a conversion coefficient; for the DC conversion coefficient transmitted from the variable length decoder in synchronization with the load control signal id_dc transmitted from the variable length decoder; A difference calculator for calculating the difference value (diff) of the DC conversion coefficient between the current block and the adjacent block by calculating and processing the size data (dct＿dc＿size) and the difference value (dct＿dc＿diff) according to the MPEG-2 standard; The inverse discrete cosine is obtained by adding the previously predicted DC conversion coefficient outputted by performing the read mode of the register unit and the difference (diff) outputted from the difference calculator as the predicted DC conversion coefficient of the current block. And an adder for outputting to the processing unit and the register unit and simultaneously providing the write mode control signal to the read / write control unit in an active state. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940015364A 1994-06-30 1994-06-30 Apparatus for predicting dc coefficient of intra frame in the picture decoding system KR0129583B1 (en)

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KR1019940015364A KR0129583B1 (en) 1994-06-30 1994-06-30 Apparatus for predicting dc coefficient of intra frame in the picture decoding system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100727988B1 (en) * 2005-10-01 2007-06-13 삼성전자주식회사 Method and apparatus for predicting DC coefficient in transform domain

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100727988B1 (en) * 2005-10-01 2007-06-13 삼성전자주식회사 Method and apparatus for predicting DC coefficient in transform domain

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