KR960032302A - Determination Method of Quantization Width in High Definition Digital Magnetic Recording and Reproducing Equipment - Google Patents

Determination Method of Quantization Width in High Definition Digital Magnetic Recording and Reproducing Equipment Download PDF

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KR960032302A
KR960032302A KR1019950003549A KR19950003549A KR960032302A KR 960032302 A KR960032302 A KR 960032302A KR 1019950003549 A KR1019950003549 A KR 1019950003549A KR 19950003549 A KR19950003549 A KR 19950003549A KR 960032302 A KR960032302 A KR 960032302A
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South Korea
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coefficients
quantization width
macroblock
obtaining
square mean
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KR1019950003549A
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Korean (ko)
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KR0135788B1 (en
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전종구
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김광호
삼성전자 주식회사
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 고화질 디지탈 자기기록재생장치에 있어서 양자화폭 결정방법에 관한 것으로서, 입력화상의 공간 영역에 대한 복잡도로부터 초기 양자화폭과, 이산여현변환 계수 중 NZ 계수의 정규화값을 구한 후, 이산여현 변환 계수를 초기 양자화폭을 이용하여 양자화하여 생성된 각 매크로블럭당 발생한 비트량과 압축되어져야 하는 각 매크로블럭당 할당비트량과의 차이와 NZ 계수의 정규화값으로부터 최종 양자화폭을 결정함으로써, 고정된 목표비트량에 가장 근접하면서도 재생화질에 영향을 미치지 않는 양자화기를 구현할 수 있는 장점이 있다.The present invention relates to a method for determining a quantization width in a high-definition digital magnetic recording and reproducing apparatus. By determining the final quantization width from the normalized value of the NZ coefficient and the difference between the amount of bits generated for each macroblock generated by quantizing the coefficients using the initial quantization width and the amount of bits allocated for each macroblock to be compressed, There is an advantage in that it is possible to implement a quantizer that is closest to the target bit amount but does not affect the reproduction quality.

Description

고화질 디지탈 자기기록재생장치에 있어서 양자화폭 결정방법Determination Method of Quantization Width in High Definition Digital Magnetic Recording and Reproducing Equipment

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

제1도는 고화질 디지탈 자기기록재생장치에 있어서 본 발명에 의한 양자화폭 결정방법을 설명하기 위한 흐름도.1 is a flowchart for explaining a method for determining a quantization width according to the present invention in a high quality digital magnetic recording and reproducing apparatus.

Claims (3)

고화질 디지탈 자기기록재생장치에 있어서, 입력화상의 공간 영역에 대한 복작도로부터 초기 양자화폭을 결정하는 초기 양자화폭 결정과정; 상기 입력화상의 이산여현변환 계수 중 NZ 계수의 정규화값을 구하는 정규화과정; 및 상기 이산여현 변환 계수를 상기 초기 양자화폭을 이용하여 양자화하여 생성된 각 매크로블럭당 발생한 비트량과 압축되어져야 하는 각 매크로블럭당 할당비트량과의 차이와 상기 NZ 갯수의 정규화값으로부터 최종 양자화폭을 결정하는 최종 양자화폭 결정과정을 포함하는 것을 특징으로 하는 양자화폭 결정방법.A high quality digital magnetic recording and reproducing apparatus, comprising: an initial quantization width determining process of determining an initial quantization width from a complexity of a spatial region of an input image; A normalization process of obtaining a normalized value of the NZ coefficients among the discrete cosine transform coefficients of the input image; And a final quantum from the difference between the amount of bits generated for each macroblock generated by quantizing the discrete cosine transform coefficients using the initial quantization width, and the amount of bits allocated for each macroblock to be compressed and the normalized value of the NZ number. A quantization width determination method comprising a final quantization width determination process for determining the width. 제1항에 있어서, 상기 초기 양자화폭 결정과정은 8×8 블럭당 평균값을 계산하여 각 화소의 평균값을 구하는 제1단계; 상기 제1단계에서 구한 각 화소의 평균값과 실제 화소의 차이를 구하여 자승평균값을 구하는 제2단계; 상기 제2단계에서 구한 자승평균값을 이용하여 하나의 세그먼트내의 블럭에 대한 총 자승평균값의합, 최대 자승평균값과 최소 자승 평균값을 각각 각각 구하는 제3단계; 및 상기 제3단계에서 구한 총 자승평균값의 합, 최대 자승평균값과 최소 자승평균값을 정규화하여 초기 양자화폭을 결정하는 제4단계로 이루어지는 것을 특징으로 하는 양자화폭 결정방법.The method of claim 1, wherein the initial quantization width determination process comprises: a first step of calculating an average value for each 8 × 8 block to obtain an average value of each pixel; A second step of obtaining a square mean value by obtaining a difference between an average value of each pixel obtained in the first step and an actual pixel; A third step of obtaining the sum of the total square mean values, the maximum square mean value, and the minimum square mean value, respectively, for the blocks in one segment by using the square mean values obtained in the second step; And a fourth step of determining an initial quantization width by normalizing the sum of the total square mean values obtained in the third step, the maximum square mean value, and the minimum square mean value. 제1항에 있어서, 상기 정규화과정은 매크로블럭내의 상기 NZ 계수의 갯수와 하나의 세그먼트내의 NZ 계수 갯수의 합을 구하는 제1단계; 상기 제1단계에서 구한 매크로블럭내의 상기 NZ 계수의 갯수와 하나의 세그먼트내의 NZ 계수 갯수의 합을 이용하여 각 매크로블럭당 평균 NZ 계수의 갯수를 구하는 제2단계; 상기 제2단계에서 구한 각 매크로블럭당 평균 NZ 계수의 갯수와 매크로블럭내의 상기 NZ 계수의 갯수와의 차이를 자승평균한 값을 구하는 제3단계; 및 상기 제3단계에서 구한 자승평균값을 이용하여 상기 각 매크로블럭의 NZ 계수의 갯수를 정규화하는 제4단계로 이루어지는 것을 특징으로 하는 양자화폭 결정방법.The method of claim 1, wherein the normalization process comprises: a first step of obtaining a sum of the number of NZ coefficients in a macroblock and the number of NZ coefficients in one segment; A second step of obtaining the number of average NZ coefficients for each macroblock by using the sum of the number of NZ coefficients in the macroblock obtained in the first step and the number of NZ coefficients in one segment; A third step of obtaining a squared average of a difference between the number of average NZ coefficients per macroblock obtained in the second step and the number of NZ coefficients in the macroblock; And a fourth step of normalizing the number of NZ coefficients of the respective macroblocks using the squared mean value obtained in the third step. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950003549A 1995-02-23 1995-02-23 Quantization width deciding method in hd-dvcr KR0135788B1 (en)

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KR0135788B1 KR0135788B1 (en) 1998-05-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100790900B1 (en) * 2006-12-14 2008-01-03 삼성전자주식회사 Method and apparatus for estimating first qp value to encode video

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100790900B1 (en) * 2006-12-14 2008-01-03 삼성전자주식회사 Method and apparatus for estimating first qp value to encode video

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