KR950024590A - Video signal encoding method and device therefor according to video characteristics - Google Patents

Video signal encoding method and device therefor according to video characteristics Download PDF

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KR950024590A
KR950024590A KR1019940001426A KR19940001426A KR950024590A KR 950024590 A KR950024590 A KR 950024590A KR 1019940001426 A KR1019940001426 A KR 1019940001426A KR 19940001426 A KR19940001426 A KR 19940001426A KR 950024590 A KR950024590 A KR 950024590A
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scan
pattern
data
encoding
sum
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KR1019940001426A
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KR0152031B1 (en
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김성태
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김광호
삼성전자 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
    • H04N19/129—Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
    • 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
    • H04N19/10—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
    • 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
    • H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
    • H04N19/196—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters

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

Abstract

본 발명은 영상특성에 따른 영상신호의 부호화방법 및 그 장치에 관한 것이다. 본 발명은 1프레임기간동안 8×8블럭내 수평·수직방향으로의 인접한 픽셀간의 차이값을 제곱하여 합산한 값들을 비교한다. 그래서, 수평방향으로의 제곱합이 수직방향제곱합보다 크거나 같으면 일반적으로 사용되는 지그재그스캔방식을 갖는 스캔-패턴을 선택하고, 수직방향으로의 제곱합이 수평방향제곱합보다 크면 수직방향으로 수캔순서가 몰린 스캔-패턴을 블럭의 스캔-패턴으로 정한다. 그런 다음 1프레임기간동안 정해진 블럭의 스캔-패턴중 가장 많이 선택된 스캔-패턴을 그 프레임의 스캔-패턴으로 결정한다. 그래서, 결정된 스캔-패턴에 따라 양자화된 계수를 스캔하여 부호화함으로써 본 발명은 비트발생량을 줄일 수 있는 효과를 제공한다.The present invention relates to a method and an apparatus for encoding a video signal according to video characteristics. The present invention compares the sum of squared difference values between adjacent pixels in the horizontal and vertical directions in an 8x8 block during one frame period. Thus, if the sum of squares in the horizontal direction is greater than or equal to the vertical sum of squares, a scan-pattern having a commonly used zigzag scan method is selected. Set the pattern as the scan-pattern of the block. Then, the scan-pattern with the most selected scan-pattern of the predetermined block for one frame period is determined as the scan-pattern of the frame. Thus, the present invention provides an effect of reducing the amount of bits generated by scanning and encoding quantized coefficients according to the determined scan-pattern.

Description

영상특성에 따른 영상신호의 부호화방법 및 그 장치Video signal encoding method and device therefor according to video characteristics

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

제1도는 본 발명에 적용된 동영상부호화장치를 나타내는 블록도,1 is a block diagram showing a video encoding apparatus applied to the present invention;

제2도는 〔런, 레벨〕 형태의 부호화 과정을 나타내는 스캔-패턴.2 is a scan-pattern illustrating an encoding process in the form of [run, level].

Claims (3)

소정의 크기의 블럭데이타를 입력받아 데이타변환하고, 변환된 계수를 양자화하여 부호화하는 동영상부호장치에 있어서, 프레임단위로 상깅 블럭데이타를 입력받아, 각 블럭데이타의 영상특성을 판단하고, 그 영상특성에 해당하는 블럭의 스캔-패턴을 선택하여 가장 많이 선택된 스캔-패턴을 프레임단위의 스캔-패턴으로 결정하는 스캔-패턴 결정부; 및 상기 스캔-패턴결정부에 의해서 결정된 프레임단위의 스캔-패턴에 따라 상기 양자화된 계수를 스캔하여 발생되는 데이타를 부호화하는 가변장부호화부를 포함하는 부호화장치.In a video encoding apparatus for receiving data of a predetermined size and converting the data, and quantizing and encoding the transformed coefficients, the video encoding device receives input gagging block data on a frame-by-frame basis to determine an image characteristic of each block data and to determine the image characteristic. A scan-pattern determination unit that selects a scan-pattern of a block corresponding to the scan-pattern as the scan-pattern of a frame unit; And a variable length encoding unit configured to encode data generated by scanning the quantized coefficients according to the scan-pattern of the frame unit determined by the scan-pattern determination unit. 제1항에 있어서, 상기 스캔-패턴결정부는 입력되는 각 블럭내 수평방향과 수직방향으로의 인접한 픽셀간의 차이값을 구하고, 그 차이값을 제곱하여 합산한 값을 서로 비교하여 큰 값을 가진 방향에 따라 스캔-패턴을 선택하는 것을 특징으로 하는 부호화장치.The method of claim 1, wherein the scan-pattern determination unit obtains a difference value between adjacent pixels in the horizontal direction and the vertical direction in each input block, and compares the sum of squared difference values to each other to have a larger value. And a scan pattern according to the encoder. 소정크기의 블럭데이타를 입력받아 데이타변환하고, 변환된 계수를 양자화하여 부호화하는 동영상부호화방법에 있어서, 프레임단위로 상기 블럭데이타를 입력받는 단계; 입력받은 블럭데이타의 수평방향과 수직방향으로 각각 인접한 픽셀간의 차이값을 구하는 단계; 상기 수평방향으로 구한 차이값들과 수직방향으로 구한 차이값들을 각각 제곱하여 합산하는 단계; 상기 수평방향제곱합과 수직방향제곱합을 비교하여 양자화된 계수가 몰릴 방향을 예측하는 단계; 복수의 스캔-패턴중 예측된 방향에 해당하는 스캔-패턴을 선택하는 단계; 프레임단위로 가장 많이 선택된 스캔-패턴을 프레임단위의 스캔-패턴으로 결정하는 단계; 및 상기 결정된 스캔-패턴에 따라 상기 양자화된 계수를 스캔하여 발생되는 데이타를 부호화하는 단계를 포함하는 영상특성에 따른 영상신호의 부호화방법.A video encoding method of receiving block data having a predetermined size, converting data, and quantizing and encoding the transformed coefficients, the video encoding method comprising: receiving the block data in units of frames; Obtaining a difference value between adjacent pixels in the horizontal and vertical directions of the input block data; Squaring and summing the difference values obtained in the horizontal direction and the difference values obtained in the vertical direction, respectively; Comparing the horizontal direction sum with the vertical direction sum to predict a direction in which the quantized coefficients will be driven; Selecting a scan-pattern corresponding to the predicted direction among the plurality of scan-patterns; Determining the scan-pattern most selected on a frame basis as a scan-pattern on a frame basis; And encoding data generated by scanning the quantized coefficients according to the determined scan-pattern. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940001426A 1994-01-27 1994-01-27 Image signal encoding method and apparatus with image characteristics KR0152031B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100775019B1 (en) * 2007-06-18 2007-11-12 삼성전자주식회사 Coding and decoding method and apparatus using plural scanning patterns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100775019B1 (en) * 2007-06-18 2007-11-12 삼성전자주식회사 Coding and decoding method and apparatus using plural scanning patterns

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