KR970014347A - Frame Reconstruction Device of MPEG Video Encoder - Google Patents

Frame Reconstruction Device of MPEG Video Encoder Download PDF

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Publication number
KR970014347A
KR970014347A KR1019950026667A KR19950026667A KR970014347A KR 970014347 A KR970014347 A KR 970014347A KR 1019950026667 A KR1019950026667 A KR 1019950026667A KR 19950026667 A KR19950026667 A KR 19950026667A KR 970014347 A KR970014347 A KR 970014347A
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South Korea
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value
scene change
frame
units
prediction error
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KR1019950026667A
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Korean (ko)
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KR100357089B1 (en
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신광영
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구자홍
엘지전자 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
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/114—Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames
    • 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
    • H04N19/142—Detection of scene cut or scene change
    • 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
    • H04N19/176—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 block, e.g. a macroblock
    • 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
    • H04N19/177—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 a group of pictures [GOP]

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

Abstract

본 발명은 MPEG 비디오 부호화기에 관한 것으로, 특히 부화시에 움직임량과 장면변화에 대응하여 GOP(Group of Picture) 구조를 효율적으로 가변할 수 있는 MPEG 비디오 부호화기의 프레임 재구성 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an MPEG video encoder, and more particularly, to an apparatus for reconstructing a frame of an MPEG video encoder capable of efficiently varying a group of picture (GOP) structure in response to a motion amount and a scene change during incubation.

상기와 같은 본 발명의 MPEG 비디오 부호화기의 프레임 재구성 장치는 입력되는 영상신호를 프레임 단위로 지연 출력하는 복수개의 프레임 지연소자와, 현재화면과 이전화면의 차이를 누적한 값과 설정된 임계값을 비교하여 장면전환 발생신호를 출력하는 장면전환 검출부와, 매크로블럭 단위로 추정되는 이전화면의 누적된 예측오차 절대 값과 현재화면의 예측오차값을 비교하여 설정된 임계값 이상의 차이가 발생하면 예측오차 분석에 따른 가감제어 신호를 출력하는 예측오차 분석출력부와, 상기 장면전환 발생신호에 의해 Ⅰ화면간의 프레임 거리(GOP의 크기)를 나타내는 N값을 가변하고, 상기 예측오차 분석출력부의 가감제어 신호에 의해 Ⅰ, P화면의 프레임 거리를 나타내는 M값을 가변하는 제어수단부와 가변 제어되는 N, M값에 의해 상기 프레임 지연소자의 영상신호가 재배열되도록 선택적으로 출력하는 선택출력부를 포함하여 이루어진다.As described above, the frame reconstruction apparatus of the MPEG video encoder according to the present invention compares a plurality of frame delay elements for delaying and outputting an input video signal in units of frames, a cumulative difference between a current screen and a previous screen, and a set threshold value. A scene change detection unit for outputting a scene change generation signal and a cumulative prediction error value of the previous screen estimated in macroblock units and a prediction error value of the current screen are compared, and when a difference is greater than the set threshold value, A predictive error analysis output unit for outputting an acceleration / deceleration control signal, and an N value indicating a frame distance (GOP size) between screens I are varied according to the scene change occurrence signal, and The frame by means of a control means for varying an M value indicating a frame distance of the P screen and an N, M value that is variably controlled. A video signal for minors to be rearranged comprises selection unit selectively outputs the output.

Description

엠펙(MPEG) 비디오 부호화기의 프레임 재구성장치Frame Reconstruction Device of MPEG Video Encoder

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

제1도는 일반적인 MPEG 비디오 부호화기의 구성블럭도.1 is a block diagram of a typical MPEG video encoder.

제3도는 (a)는 본 발명의 프레임 재구성기의 상위블럭도, (b)는 본 발명에 따른 예측오차 분석출력부의 상세블럭도, (c)는 예측오차 분석출력부의 비교기의 동작흐름도, (d)는 본 발명에 따른 장면전환 검출부의 상세블럭도.3 is (a) the upper block diagram of the frame reconstructor of the present invention, (b) the detailed block diagram of the prediction error analysis output unit according to the present invention, (c) the operation flow diagram of the comparator of the prediction error analysis output unit, ( d) is a detailed block diagram of the scene change detection unit according to the present invention;

Claims (3)

입력되는 영상신호를 프레임 단위로 지연 출력하는 복수개의 프레임 지연소자와, 현재화면과 이전화면의 차이를 누적한 값과 설정된 임계값을 비교하여 장면전환 발생신호를 출력하는 장면전환 검출부와, 매크로블럭 단위로 추정되는 이전화면의 누적된 예측오차 절대값과 현재화면의 예측오차값을 비교하여 설정된 임계값 이상의 차이가 발생하면 예측오차 분석에 따른 가감제어 신호를 출력하는 예측오차 분석출력부와, 상기 장면전환 검출부의 장면전환 발생신호에 의해 Ⅰ화면간의 프레임 거리(GOP의 크기)를 나타내는 N값을 가변하고, 상기 예측오차 분석출력부의 가감제어 신호에 의해 Ⅰ, P 화면의 프레임 거리를 나타내는 M값을 가변하는 제어수단부와, 상기 제어수단부의 가변 제어되는 N, M값에 의해 상기 프레임 지연소자의 영상신호가 재배열되도록 선택적으로 출력하는 선택 출력부를 포함하여 구성됨을 특징으로 하는 MPEG 비디오 부호화기의 프레임 재구성장치.A plurality of frame delay elements for delayed output of an input video signal in units of frames, a scene change detection unit for outputting a scene change generation signal by comparing a accumulated value of a difference between a current screen and a previous screen and a set threshold value, and a macro block A prediction error analysis output unit for outputting an accel / decel control signal according to the prediction error analysis when a difference between the absolute value of the accumulated prediction error estimated in units of the previous screen and the prediction error value of the current screen is greater than a predetermined threshold value; The N value indicating the frame distance (GOP size) between the I screens is varied by the scene change occurrence signal of the scene change detection unit, and the M value indicating the frame distance of the I and P screens by the control signal of the prediction error analysis output unit. The video signal of the frame delay element is cultivated by a control means for varying To MPEG frame reconstruction unit of a video encoder, characterized by configured by comprising a selection output selectively outputting the. 제1항에 있어서, 장면전환 검출부는 이전화면값과 현재화면값을 매크로블럭 단위로 비교하여 감산하는 감산기와, 상기 감산기의 차이값을 절대값으로 하여 프레임 단위로 계속 합산하는 절대값 계산부 및 축적기와, 상기 축적기의 어느 한 프레임의 누적값이 설정되어 있는 임계값보다 크면 장면전환 발생신호를 출력하는 비교기를 포함하여 구성됨을 특징으로 하는 MPEG 비디오 부호화기의 프레임 재구성장치.The apparatus of claim 1, wherein the scene change detection unit comprises: a subtractor for comparing and subtracting the previous screen value and the current screen value in units of macroblocks; an absolute value calculator for continuously adding the difference value of the subtractor as an absolute value in units of frames; And an accumulator and a comparator for outputting a scene change generation signal when the cumulative value of any one frame of the accumulator is larger than a set threshold value. 제1항에 있어서, 예측오차 분석출력부는 매크로블럭 단위로 추정되는 예측오차값을 절대값으로 하여 프레임 단위로 합산하는 절대값 계산부 및 축적기와, 레지스터의 누적된 이전화면의 예측오차 절대값과 상기 축적기의 현재화면의 예측오차값을 비교하여 설정된 임계값 이상의 차이가 나면 가감제어 신호를 출력하는 비교기를 포함하여 구성됨을 특징으로 하는 MPEG 비디오 부호화기의 프레임 재구성장치.The method of claim 1, wherein the predictive error analysis output unit comprises an absolute value calculator and accumulator that adds the predicted error value estimated in macroblock units as an absolute value in units of frames, and the absolute value of the predicted error of the accumulated previous screen of the register. And a comparator configured to compare the prediction error value of the current screen of the accumulator and output an accel / decel control signal when a difference is greater than or equal to a predetermined threshold value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950026667A 1995-08-25 1995-08-25 Frame reconstruction device of mpeg video encoder KR100357089B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100605410B1 (en) * 1997-07-10 2006-10-24 소니 가부시끼 가이샤 Picture processing apparatus, picture processing method and recording medium

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* Cited by examiner, † Cited by third party
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EP3021579B1 (en) * 2014-11-14 2016-10-12 Axis AB Method and encoder system for encoding video

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100605410B1 (en) * 1997-07-10 2006-10-24 소니 가부시끼 가이샤 Picture processing apparatus, picture processing method and recording medium

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