KR970057795A - Variable frame rate of compressed video data - Google Patents

Variable frame rate of compressed video data Download PDF

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KR970057795A
KR970057795A KR1019950053764A KR19950053764A KR970057795A KR 970057795 A KR970057795 A KR 970057795A KR 1019950053764 A KR1019950053764 A KR 1019950053764A KR 19950053764 A KR19950053764 A KR 19950053764A KR 970057795 A KR970057795 A KR 970057795A
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data
signal
compression
frames
frame
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KR1019950053764A
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Korean (ko)
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KR0176346B1 (en
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안정준
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정장호
Lg 정보통신 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
    • H04N19/10—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
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/13—Linear codes
    • H03M13/15—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes
    • H03M13/151—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes using error location or error correction polynomials
    • H03M13/152—Bose-Chaudhuri-Hocquenghem [BCH] codes
    • 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
    • H04N19/124—Quantisation
    • 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
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
    • 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
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
    • 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

Abstract

본 발명은 영상회의 시스템에서 영상 압축 처리중 압축되는 영상 데이터 프레임의 제어 장치에 관한 것으로, 특히 압축 처리되어지는 영상데이터의 프레임수를 초당 최대 30프레임내에서 가변적으로 조절하여 네트워크 전송속도에 따라 전송되는 데이터량과 압축 처리되어 발생하는 영상 압축데이터량을 비례하게 한 압축 영상데이터 프레임수 가변 제어 장치에 관한 것이다.The present invention relates to a control apparatus of a video data frame that is compressed during a video compression process in a videoconferencing system. In particular, the number of frames of video data to be compressed is variably adjusted within a maximum of 30 frames per second and transmitted according to a network transmission rate. An apparatus for controlling a variable number of compressed image data frames in which the amount of data to be processed and the amount of image compressed data generated by compression processing are proportional to each other.

즉, 양자화 계수값의 크기가 설정된 양자화 계수값 보다 크거나 같을 경우에 대해서는 입력되는 소정 갯수의 데이터의 프레임을 하이 임피던스 상태로 만들어 압축처리부에서 압축 처리하지 않고 그 데이터에 대해서는 건너뛰게 함으로써 최종단의 저전송 속도에 따라 누적되는 압축데이터의 량을 조절할 수 있게 되어 차후의 비효율적인 영상 압축이 방지되고 또한 압축 영상데이터 스트림의 손실이 예방됨에 따라 복원되는 영상의 화질이 향상되어 시스템 전체의 신뢰성이 향상된다.That is, when the magnitude of the quantization coefficient value is greater than or equal to the set quantization coefficient value, the predetermined number of frames of data to be input is made into a high impedance state so that the compression processing section skips the data without compressing the data. The cumulative amount of compressed data can be adjusted according to the low transmission speed, preventing inefficient image compression in the future and preventing loss of the compressed image data stream. do.

Description

압축 영상데이터 프레임 수 가변 제어 장치Compressed video data frame rate variable control device

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

제1도는 본 발명 압축 영상데이터 프레임 수 가변 제어 장치의 구성 블럭도.1 is a block diagram of the apparatus for controlling a variable number of compressed image data frames according to the present invention.

제2도는 제1도에서 영상 압축 처리단의 구성 블럭도.FIG. 2 is a block diagram of an image compression processing stage shown in FIG.

제3도는 제2도에서 인터페이스부의 구성 블럭도.3 is a block diagram illustrating a configuration of an interface unit in FIG. 2;

제4도는 제3도에서 제어부의 구성 블럭도.4 is a block diagram illustrating a configuration of a control unit in FIG. 3;

제5도는 본 발명에 따라 생성되는 신호들의 타이밍도.5 is a timing diagram of signals generated in accordance with the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

100 : 영상 A/D(Analog/Digital)변환 처리부100: Image A / D (Analog / Digital) conversion processing unit

200 : 영상 공통 포맷 처리단 300 : 영상 압축 처리단200: video common format processing stage 300: video compression processing stage

310 : 인터페이스부 311 : 제어부310: interface unit 311: control unit

311a : 양자화 계수 비교기 311b : FS변환기311a: Quantization Coefficient Comparator 311b: FS Converter

311c : 앤드게이트 311d : 프레임 수 카운터311c: ANDGATE 311d: Frame Count Counter

311e : 제어신호 발생기 312 : 처리부311e: control signal generator 312: processing unit

313 : 딜레이부 320 : 압축처리부313: delay unit 320: compression processing unit

330 : BCH코더부 400 : 네트워크 접속 처리단330: BCH coder 400: network connection processing stage

Claims (3)

아날로그 영상신호를 입력하여 디지탈 영상신호로 변환시켜 프레임 단위로 출력하는 영상 A/D변환 처리단과, 상기 영상 A/D변환 처리단으로부터 입력한 프레임 단위의 디지탈 영상신호를 최초 입력된 영상신호의 포맷에 관계없이 영상압축에 필요한 형태로 생성하여 초당 30프레임씩 출력하는 영상 공통 포맷 처리단과, 상기 영상 공통 포맷 처리단에서 출력되는 데이터와 각종 신호를 입력하고 입력한 영상데이터를 압축 처리하여 압축 영상데이터 스트림으로 만들어 프레임 단위로 최종 출력단인 네트워크 접속 처리단으로 전송하는 영상 압축 처리단을 포함하는 압축 영상데이터 제어 장치에 있어서, 상기 영상 압축 처리단은 상기 영상 공통 포맷 처리단으로부터 초당 30프레임씩 입력되는 데이터의 프레임을 현재 양자화 계수값(Q[0:4])과 사용자에 의해 미리 설정된 양자화 계수값의 비교 결과에 따라 제어하여 출력하는 인터페이스부와; 최종 출력단의 전송속도에 의해 달라지는 송신 버퍼의 잔류 데이터 용량에 따라 데이터 압축을 위한 양자화 계수값(Q[0:4])을 상기 인터페이스부로 출력하고, 이에 따라 상기 인터페이스부를 통해 출력되는 데이터 프레임(D[0:7])을 압축하는 압축처리부와; 상기 압축처리부를 통해 압축 처리된 데이터의 에러상태를 확인하여 에러 수정/검출 가능 데이터를 삽입시킴으로써 수신측에서 그 상태를 검출하여 원래 영상데이터로 복원하거나 에러의 포함유무를 알 수 있도록 하는 BCH 코더부를 포함하는 것을 특징으로 하는 압축 영상데이터 프레임 수 가변 제어 장치.A video A / D conversion processing stage that inputs an analog video signal, converts it into a digital video signal, and outputs it in units of frames; Regardless of the type, the image common format processing stage generates 30 frames per second and outputs 30 frames per second, and the data and various signals inputted from the image common format processing stage are compressed and compressed. In the compressed image data control device comprising a video compression processing stage to make a stream to the network connection processing stage that is the final output stage in units of frames, wherein the image compression processing stage is input 30 frames per second from the video common format processing stage The frame of data depends on the current quantization coefficient value (Q [0: 4]) and the user. Interface unit which controls the output according to a result of comparison between a predetermined value and quantized coefficients; The data frame D outputs the quantization coefficient value Q [0: 4] for data compression to the interface unit according to the remaining data capacity of the transmission buffer, which depends on the transmission speed of the final output stage. A compression processing unit for compressing [0: 7]); The BCH coder unit checks the error state of the compressed data through the compression processing unit and inserts error correction / detection-capable data to detect the state at the receiver and restore the original image data or to know whether an error is included. Device for controlling the number of compressed image data frames, characterized in that it comprises a. 제1항에 있어서, 상기 인터페이스부는 상기 영상 A/D변환 처리단에서 데이터가 프레임 단위로 출력될 때마다 발생하는 제1프레임 구별신호(FS)와, 상기 영상 공통 포맷 처리단에서 상기 제1프레임 구별신호(FS)를 수신하여 생성한 제2프레임 구별신호(FSI)를 지연시킨 제4프레임 구별신호(FSB) 및 상기 압축처리부에서 발생하는 양자화 계수값(Q[0:4])과 압축 처리의 기본 단위인 매크로 블럭 구별신호(MB)를 입력하여 상기 영상 공통 포맷 처리단으로부터 입력된 데이터 프레임(D[0:7])의 출력 상태를 제어하는 제어부와; 상기 제어부에서 제어신호(CTRL)가 출력되는 동안 현재 입력되는 데이터 프레임(D[0:7])들을 하이 임피던스 상태로 만들어 상기 압축처리부에서 이에 대해 압축 처리를 행하지 않도록 하고, 제어신호(CTRL)가 출력되지 않으면 그대로 상기 압축처리부로 출력하여 압축되도록 하는 처리부와; 상기 처리부에서 제2프레임 구별신호(FSI)를 입력하여 상기 제어부의 제어신호(CTRL)에 의해 생성한 제3프레임 구별신호(FSE)를 지연시켜 상기 제어부와 상기 압축처리부로 출력하는 딜레이부를 포함하는 것을 특징으로 하는 압축 영상데이터 프레임 수 가변 제어 장치.The image processing apparatus of claim 1, wherein the interface unit comprises a first frame discrimination signal FS generated whenever data is output in units of frames from the image A / D conversion processing stage, and the first frame in the image common format processing stage. The fourth frame discrimination signal FSB, which delays the second frame discrimination signal FSI generated by receiving the discrimination signal FS, and the quantization coefficient value Q [0: 4] generated by the compression processor and the compression process A control unit for controlling an output state of a data frame D [0: 7] input from the video common format processing stage by inputting a macroblock discrimination signal MB, which is a basic unit of? While the control signal CTRL is output from the control unit, the data frame D [0: 7] currently input is made into a high impedance state so that the compression processing unit does not perform a compression process on the control signal CTRL. A processing unit for outputting to the compression processing unit as it is and outputting the compression as it is; And a delay unit configured to input a second frame discrimination signal FSI from the processor to delay the third frame discrimination signal FSE generated by the control signal CTRL of the controller and output the delayed third frame discrimination signal FSE to the controller and the compression processor. Device for controlling the number of compressed image data frames, characterized in that. 제2항에 있어서, 상기 제어부는 사용자에 의해 미리 설정된 양자화 계수값과 상기 압축처리부에서 생성된 현재의 양자화 계수값(Q[0:4])을 비교하여 현재의 양자화 계수값이 더 크거나 같을 경우 스킵신호(SKIP)를 출력하는 양자화 계수 비교기와; 상기 영상 A/D변환 처리단에서 생성된 제1프레임 구별신호(FS)가 입력될 때마다 시스템 클럭의 1클럭을 하이상태로 하여 출력하는 FS변환기와; 상기 양자화 계수 비교기의 출력신호인 스킵신호(SKIP)와 상기 FS변환기의 출력신호(FSS)를 논리곱하는 앤드게이트와; 상기 앤드게이트의 첫번째 하이 출력 신호에 의해 인에이블 되어 다음 입력되는 하이 출력 신호로써 데이터의 프레임 수를 카운트하여 사용자가 설정한 프레임 수와 일치하게 되면 초기화하고, 리셋신호(RST)를 상기 양자화 계수 비교기로 출력하여 스킵신호(SKIP)가 오프되도록 하는 프레임 수 카운터와; 상기 앤드게이트의 첫번째 하이 출력 신호에 의해 인에이블되어 상기 프레임 수 카운터에서 리셋신호(RST)가 발생할 때까지 상기 처리부로 제어신호(CTRL)를 출력하는 제어신호 발생기를 포함하는 것을 특징으로 하는 압축 영상데이터 프레임 수 가변 제어 장치.3. The method of claim 2, wherein the control unit compares the quantization coefficient value preset by the user with the current quantization coefficient value Q [0: 4] generated by the compression processor to determine whether the current quantization coefficient value is greater than or equal to. A quantization coefficient comparator for outputting a skip signal SKIP; An FS converter for outputting one clock of a system clock high every time the first frame discrimination signal FS generated by the video A / D conversion processing stage is input; An AND gate which logically multiplies a skip signal SKIP which is an output signal of the quantization coefficient comparator and an output signal FSS of the FS converter; Enabled by the first high output signal of the AND gate, the next input high output signal counts the number of frames of data and initializes when it matches the number of frames set by the user, and resets the reset signal RST to the quantization coefficient comparator. A frame number counter for outputting a signal so that the skip signal SKIP is turned off; And a control signal generator which is enabled by the first high output signal of the AND gate and outputs a control signal CTRL to the processor until a reset signal RST is generated in the frame number counter. Data frame number variable control device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950053764A 1995-12-21 1995-12-21 Apparatus for variably controlling the frame number of compressed video data KR0176346B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101068312B1 (en) * 2004-06-02 2011-09-28 엘지전자 주식회사 Method and apparatus for controlling of a remote desktop
KR20150101313A (en) 2014-02-26 2015-09-03 한화테크윈 주식회사 Apparatus and method for processing image

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101068312B1 (en) * 2004-06-02 2011-09-28 엘지전자 주식회사 Method and apparatus for controlling of a remote desktop
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