KR950007535A - Video compression encoding device - Google Patents

Video compression encoding device Download PDF

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KR950007535A
KR950007535A KR1019940017533A KR19940017533A KR950007535A KR 950007535 A KR950007535 A KR 950007535A KR 1019940017533 A KR1019940017533 A KR 1019940017533A KR 19940017533 A KR19940017533 A KR 19940017533A KR 950007535 A KR950007535 A KR 950007535A
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motion vector
unit
coding
dct
motion
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KR1019940017533A
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KR0130167B1 (en
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조택일
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이헌조
주식회사 금성사
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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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/513—Processing of motion vectors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
    • H03K19/1733—Controllable logic circuits
    • H03K19/1737—Controllable logic circuits using multiplexers
    • 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
    • H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
    • 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
    • H04N19/102—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
    • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/533—Motion estimation using multistep search, e.g. 2D-log search or one-at-a-time search [OTS]

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 동영상의 부호화시 시간축의 군더더기(Temporal Redundancy)를 줄이기 위하여 사용하는 움직임 벡터를 변환 코딩(Coding)하여 화질을 손상시키기 않으면서 영상의 압축률을 높일 수 있게 하는 동영상 압축 부호화 장치에 관한 것이다.The present invention relates to a video compression encoding apparatus for transforming a motion vector used to reduce temporal redundancy in encoding a video to increase the compression ratio of an image without damaging the image quality.

일반적으로 동영상 압축 보호화는 좋은 화질을 제공하면서 높은 압축비를 얻을 수 있도록 하는데 그 목적이 있는 것으로 높은 압축비를 얻기 위해서는 시간상 및 공간상의 군더더기를 제거해야 된다.In general, video compression protection provides a high image quality while providing a good image quality. The purpose of the video compression protection is to remove the lumps in time and space in order to obtain a high compression ratio.

종래의 동영상 압축 부호화장치는 움직임 벡터에 대하여 가변길이 코딩만으로 압축하는 것으로서, 실제의 영상에 있어서의 움직임 벡터는 배경과 물체로 분리되어 배경에 대한 물체의 움직임 또는 물체에 대한 배경의 움직임 형태 즉, 움직임 벡터는 영상의 2차원 평면에 밀접한 관계가 있음을 나타내고, 이는 움직임 벡터의 압축에 많은 여지가 있음을 나타내는 것으로, 종래에는 움직임 벡터에 대하여 가변길이 코딩만을 수행하여 압축률이 낮은 문제점이 있었다.Conventional video compression coding apparatus compresses only motion vector with variable length coding, and the motion vector in the actual image is divided into a background and an object, so that the motion of the object with respect to the background or the motion of the background with respect to the object, The motion vector indicates a close relationship to the two-dimensional plane of the image, which indicates that there is much room for compression of the motion vector. In the related art, only a variable length coding is performed on the motion vector, thereby causing a low compression rate.

따라서, 본 발명은 상기와 같은 종래의 제반 문제점을 해결하기 위하여 창안한 것으로서, 입력영상의 움직임을 추정한 움직임 벡터를 2차원 영상으로 표현하고, 이를 무손실 코딩 또는 손실가미안 코딩의 인트라 코딩방법으로 코딩하여 출력함으로써, 화질을 손상시키기 않으면서 영상을 높은 압축률로 압축시킬 수 있는 동영상 압축 부호화 장치이다.Accordingly, the present invention has been devised to solve the above-mentioned conventional problems, and represents a motion vector estimating the motion of the input image as a two-dimensional image, which is coded using an intra coding method of lossless coding or lossy gamma coding. And a video compression encoding apparatus capable of compressing an image at a high compression rate without compromising image quality.

Description

동영상 압축 부호화 장치Video compression encoding device

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

제2도는 본 발명의 동영상 압축 부호화 장치의 블럭도.2 is a block diagram of a video compression encoding apparatus of the present invention.

제3도는 본 발명의 무손실 코딩을 실현키위한 움직임 벡터 압축부의 블럭도.3 is a block diagram of a motion vector compression unit for realizing the lossless coding of the present invention.

제4도는 본 발명의 손실감안 코딩을 실현키위한 움직임 벡터 압축부의 블럭도.4 is a block diagram of a motion vector compression unit for realizing lossy coding of the present invention.

제5도는 본 발명의 무손실 코딩과 손실감안 코딩을 선택적으로 사용하기 위한 움직임 벡터 압축부의 블럭도.5 is a block diagram of a motion vector compression unit for selectively using lossless coding and lossy coding of the present invention.

Claims (7)

입력영상을 DCT 및 양자화하여 움직임 보상을 실행하는 DCT/양자화/움직임 보상부(21)와, 상기 DCT/양자화/움직임 보상부(21)의 출력신호를 가변길이 코딩방법으로 코딩하는 가변길이 코딩부(22)와, 입력영상의 움직임을 정하여 움직임 벡터를 출력하는 움직임 추정부(23)와, 상기 움직임 추정부(23)의 출력신호를 인트라(Intra) 압축방법으로 압축하는 움직임 벡터 압축부(24)와, 상기 가변길이 코딩부(22) 또는 움직임 벡터 압축부(24)의 출력신호를 선택적으로 출력하는 멀티플렉서/출력 버퍼부(25)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.DCT / quantization / motion compensation unit 21 for performing motion compensation by DCT and quantizing the input image, and variable length coding unit for coding the output signal of the DCT / quantization / motion compensation unit 21 with variable length coding method (22), a motion estimator (23) for determining a motion of the input image and outputting a motion vector, and a motion vector compressor (24) for compressing the output signal of the motion estimator (23) by an intra compression method. And a multiplexer / output buffer unit (25) for selectively outputting the output signal of the variable length coding unit (22) or the motion vector compression unit (24). 제1항에 있어서, 상기 움직임 벡터 압축부(24)는 움직임 추정부(23)에서 출력되는 움직임 벡터를 2차원 영상으로 배열하는 움직임 벡터 영상변환부(31)와, 상기 움직임 벡터 영상변환부(31)의 출력신호를 코딩시 발생하는 손실을 감안하여 코딩하는 손실감안 코딩부(33)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.The motion vector compression unit 24 of claim 1, further comprising: a motion vector image converter 31 for arranging the motion vectors output from the motion estimator 23 into a two-dimensional image; 31. A video compression protection apparatus characterized by comprising a loss sensitive coding unit 33 for coding an output signal of 31) in consideration of a loss generated during coding. 제1항에 있어서, 상기 움직임 벡터 압축부(24)는 움직임 추정부(23)에서 출력되는 움직임 벡터를 2차원 영상으로 배열하는 움직임 벡터 영상변환부(31)와, 상기 움직임 벡터 영상변환부(31)의 출력신호를 손실없이 코딩하는 무손실 코딩부(32)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.The motion vector compression unit 24 of claim 1, further comprising: a motion vector image converter 31 for arranging the motion vectors output from the motion estimator 23 into a two-dimensional image; 31. A video compression protection apparatus characterized by comprising a lossless coding unit (32) for coding the output signal of (31) without loss. 제1항에 있어서, 상기 움직임 벡터 압축부(24)는 움직임 추정부(23)에서 출력되는 움직임 벡터를 2차원 영상으로 배열하는 움직임 벡터 영상변화부(31)와, 상기 움직임 벡터 영상변환부(31)의 출력신호를 손실없이 코딩하는 무손실 코딩부(32)와, 상기 움직임 벡터 영상변환부(31)의 출력신호를 코딩시 발생하는 손실을 감안하여 코딩하는 손실감안 코딩부(33)와, 상기 무손실 코딩부(32) 또는 손시리감안 코딩부(33)의 출력신호를 미리 설정된 제어신호에 따라 선택하여 멀티플렉서/출력 버퍼부(25)로 출력하는 선택부(34)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.The motion vector compression unit 24 of claim 1, further comprising: a motion vector image changer 31 for arranging the motion vectors output from the motion estimator 23 into a two-dimensional image; A lossless coding unit 32 for coding the output signal of the signal 31 without loss, a loss sensitive coding unit 33 for coding the output signal of the motion vector image conversion unit 31 in consideration of a loss generated during coding, and And a selector 34 which selects an output signal of the lossless coding unit 32 or the handheld coding unit 33 according to a preset control signal and outputs the output signal to the multiplexer / output buffer unit 25. Video compression protection device. 제2항 또는 제4항에 있어서, 상기 손실감안 코딩부(33)는 상기 움직임 벡터 영상변환부(31)로부터 입력되는 수평, 수직 움직임 벡터영상을 DCT 및 양자화하여 출력하는 DCT/양자화부(33-A)와, 상기 DCT/양자화부(33-A)의 출력신호를 가변길이 코딩하여 멀티플렉서/출력 버퍼부(25)로 출력하는 가변길이 코딩부(33-C)와, 상기 DCT/양자화부(33-A)에서 코딩된 움직임 벡터영상을 역 DCT 및 역 양자화하여 움직임 벡터영상으로 복원하여 DCT/양자화/움직임 보상부(21)로 출력하는 역 DCT/양자화부(33-B)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.The DCT / quantizer 33 according to claim 2 or 4, wherein the loss sensitive coding unit 33 DCTs and quantizes the horizontal and vertical motion vector images input from the motion vector image converter 31. A variable length coding unit 33-C for variable length coding the output signal of the DCT / quantization unit 33-A to the multiplexer / output buffer unit 25, and the DCT / quantization unit; The inverse DCT and inverse quantization of the motion vector image coded in (33-A) is performed by the inverse DCT / quantization unit 33-B which outputs the DCT / quantization / motion compensation unit 21 and outputs it. A video compression protection device. 제3항 또는 제4항에 있어서, 상기 무손실 코딩부(32)는 상기 움직임 벡터 영상변화부(31)로부터 입력되는 수평, 수직 움직임 벡터영상을 DPCM 코딩방법으로 각 벡터값 사시의 차를 구하는 DPCM수행부(31-A)와, 상기 DPCM수행부(32-A)에서의 출력을 가변길이 코딩하여 멀티플렉서/출력 버퍼부(25)로 출력하는 가변길이 코딩부(32-B)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.5. The DPCM of claim 3 or 4, wherein the lossless coding unit 32 calculates the difference between the vector value strabismus by the DPCM coding method of the horizontal and vertical motion vector images input from the motion vector image changing unit 31. And a variable length coding unit 32-B for variable length coding the output from the DPCM performing unit 32-A and outputting the variable length coding to the multiplexer / output buffer unit 25. Video compression protection device. 제5항에 있어서, 상기 DCT/양자화부(33-A)는 입력되는 수평, 수직 움직임 벡터 영상을 DCT처리하는 움직임 벡터 영상 DCT부(33-A1)와, 상기 움직임벡터 영상 DCT부(33-A1)에서 DCT처리된 수평, 수직 움직임벡터 영상을 양자화하는 움직임벡터 양자화부(33-A2)로 구성되며, 상기 역 DCT/양자화부(33-B)는 상기 DCT/양자화부(33-A)에서 코딩된 움직임 벡터영상을 역 양자화하는 움직임벡터상 역양자화부(33-B2)와, 역 DCT 처리하는 움직임벡터 영상 역 DCT부(33-B1)로 구성된 것을 특징으로 하는 동영상 압축 보호화 장치.6. The DCT / quantization unit 33-A of claim 5, wherein the DCT / quantization unit 33-A includes a motion vector image DCT unit 33-A1 for DCT processing the input horizontal and vertical motion vector images, and the motion vector image DCT unit 33-A. A1) comprises a motion vector quantizer 33-A2 for quantizing the DCT processed horizontal and vertical motion vector image, wherein the inverse DCT / quantizer 33-B is the DCT / quantizer 33-A. And a motion vector inverse quantizer (33-B2) for inversely quantizing the motion vector image coded by the motion vector image, and a motion vector image inverse DCT portion (33-B1) for inverse DCT processing. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940017533A 1993-08-21 1994-07-20 Mpeg apparatus KR0130167B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100580109B1 (en) * 2003-12-19 2006-05-12 주식회사 팬택앤큐리텔 Mobile communication terminal and method for recording moving-image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100580109B1 (en) * 2003-12-19 2006-05-12 주식회사 팬택앤큐리텔 Mobile communication terminal and method for recording moving-image

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