KR930008652A - Buffer Control Method in Image Compression - Google Patents

Buffer Control Method in Image Compression Download PDF

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Publication number
KR930008652A
KR930008652A KR1019910017823A KR910017823A KR930008652A KR 930008652 A KR930008652 A KR 930008652A KR 1019910017823 A KR1019910017823 A KR 1019910017823A KR 910017823 A KR910017823 A KR 910017823A KR 930008652 A KR930008652 A KR 930008652A
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South Korea
Prior art keywords
buffer
data
input data
blocks
transmission rate
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KR1019910017823A
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Korean (ko)
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KR0152772B1 (en
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윤대희
박용철
김승일
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이헌조
주식회사 금성사
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Priority to KR1019910017823A priority Critical patent/KR0152772B1/en
Publication of KR930008652A publication Critical patent/KR930008652A/en
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Publication of KR0152772B1 publication Critical patent/KR0152772B1/en

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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
    • H04N19/423—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 characterised by memory arrangements
    • 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

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 영상 압축 방식에서 출력버퍼의 제어에 관한 것으로, 일반적으로 사용되고 있는 종래의 버퍼 콘트롤 방식은 전치-처리(Pre-Processing)기법을 이용한 방식으로 처리될 입력데이타를 미리 처리하여 보고 알맞는 대역이나 비트수를 입력 데이터에 분배하여 원하는 전송율에 맞추어 버퍼 제어를 이루는 것으로, 이 방식은 준최적(Sub-Optimum)의 전송 대역의 사용과 큰트로 파라미터의 사용이 가능한 반명에 처리 시간의 지연과 회로구성의 어려움을 동반하게 되며 또 다른 방식은 입력되는 데이터의 매 순간마다 채널이나 버퍼의 상태를 수시로 체크하여 콘트롤 신호를 입력단으로 궤화시켜 전송율을 맞추어 나가는 채널 등화(Channel Equalization)방식으로서, 이는 입력 데이터의 매수간 특성을 잘 번영하며 궤환 루프를 이용한 관계로 빠르고 간단한 시스템의 구성이 가능하나 입력 데이터의 전반적인 특성을 무시할 가능성이 있으며, 전송 대역이나 버퍼의 효율적인 사용이 어렵고 궤환되는 큰트롤 파라미터의 급격한 변동을 일으킬 소지가 있다.The present invention relates to the control of the output buffer in the image compression method, the conventional buffer control method is generally used to pre-process the input data to be processed in a manner using a pre-processing technique to look at the appropriate band In addition, the number of bits is distributed to the input data to achieve buffer control according to a desired transmission rate. This method uses a sub-optimal transmission band and a parameter that can use a large parameter, resulting in a delay in processing time and a circuit. Another method is channel equalization, which checks the state of a channel or buffer at any moment of the input data and converts the control signal to the input to match the transmission rate. Fast and simple system that thrives on the characteristics of the number of sheets and uses the feedback loop This configuration is possible and the possibility to override the overall characteristics of the one input data, the possession cause sudden change of the parameter is greater trawl efficient use of transmission bandwidth or buffer that is fed back is difficult.

이에 따라 본 발명은 상기와 같은 종래의 영상 압축에서의 버퍼 제어 방식의 결함을 감안하여 입력 데이터를 잠시 메모리에 저장하고 이를 일정한 크기의 블록으로 세분하여 각 블록을 순차적으로 처리를 하지않고, 송,수신단에서 갖고 있는 패턴에 따라 랜덤하게 처리를 하며 이때 처리되는 블록을 몇 개 묶는 집합인 세그먼트 단위로 발생되는 데이터량을 조사하여 발생 데이터 량이 많으면 그 다음 세그먼트 역시 전송률보다 큰 데이터율을 갖는다고 할 수 있으므로 콘트롤 신호를 궤환시켜 쉽게 원하는 전송율이나 데이터량에 수렴시킬 수 있도록 창안한 것으로 본 발명을 통해 버퍼를 매우 효율적으로 제어할 수 있고 실시간 처리가 가능하게 된다.Accordingly, the present invention stores the input data in the memory for a while in consideration of the deficiency of the buffer control method in the conventional video compression as described above, and subdivides it into blocks of a certain size so that each block is not sequentially processed, The receiver processes the data randomly according to the pattern of the receiving end. At this time, if the amount of generated data is large by examining the amount of data generated in units of segments, which is a set of several blocks, the next segment also has a higher data rate than the transmission rate Therefore, the control signal is fed back so that it can be easily converged to a desired transmission rate or data amount. According to the present invention, the buffer can be controlled very efficiently and real-time processing is possible.

Description

영상 압축에서의 버퍼 제어 방법Buffer Control Method in Image Compression

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

제 2 도는 본 발명에 따른 영상 압축에 따른 버퍼 제어 방법의 블록선도,2 is a block diagram of a buffer control method according to image compression according to the present invention;

제 3 도는 본 발명에서의 블록 스크램블링에 의한 버퍼 제어 흐름도.3 is a flowchart of a buffer control by block scrambling in the present invention.

Claims (3)

입력 디지털 신호를 받아 메모리에 저장한 후 입력 신호를 일정한 크기의 블록으로 세분화하고 구별된 각 블록들을 송 수신단에 갖고 있는 랜덤한 패턴에 따라 불규칙하게 선택한 다음 처리되는 랜덤 순서의 블록들에게 알맞은 개수를 모아 그 합을 구하여 전체 입력 데이터의 평균 값과 유사한 값을 산출한후 이 값에 따라서 버퍼의 상태를 제어하는 것을 특징으로 하는 영상 압축에서의 버퍼 제어 방법.After receiving the input digital signal and storing it in the memory, the input signal is divided into blocks of a certain size, and each of the blocks are randomly selected according to the random pattern of the transmitter and receiver. Gathering, calculating a sum, calculating a value similar to an average value of the entire input data, and controlling the state of the buffer according to the value. 제 1항에 있어서, 버퍼상태의 제어는 8×8 픽셀 블록으로 분류된 입력 영상을 블록 스크램블링하고 문턱 값 및 양자화 스텝 사이즈를 초기화하여 선택된 변환계수를 양자한 후 전체 프레임을 처리하는데 사용된 비트의 총수에 대한 평균으로부터 N개의 연속하는 블록으로 구성된 세그먼트에서 사용된 비트수를 구하고 버퍼의 상태를 체크하여 그에 따른 문턱 값 및 양자화 스탭 사이즈를 조절하여 마지막 세그먼트까지 상기의 과정을 반복하는 것을 특징으로 하는 영상 압축에서의 버퍼 제어 방법.The method of claim 1, wherein the control of the buffer state is performed by block scrambling an input image classified into 8x8 pixel blocks, initializing a threshold value and a quantization step size to quantize a selected transform coefficient, and then processing the entire frame. Obtaining the number of bits used in the segment consisting of N consecutive blocks from the average of the total number, checking the state of the buffer and adjusting the threshold value and the quantization step size accordingly, repeating the above process until the last segment Buffer control method in image compression. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910017823A 1991-10-10 1991-10-10 Buffer controlling method KR0152772B1 (en)

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KR1019910017823A KR0152772B1 (en) 1991-10-10 1991-10-10 Buffer controlling method

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KR1019910017823A KR0152772B1 (en) 1991-10-10 1991-10-10 Buffer controlling method

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KR930008652A true KR930008652A (en) 1993-05-21
KR0152772B1 KR0152772B1 (en) 1998-10-15

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WO2007105618A1 (en) 2006-03-14 2007-09-20 Nec Corporation Buffer control method, relaying device and communication system

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