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KR970019622A - Device for encoding video - Google Patents

Device for encoding video Download PDF

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Publication number
KR970019622A
KR970019622A KR1019950032863A KR19950032863A KR970019622A KR 970019622 A KR970019622 A KR 970019622A KR 1019950032863 A KR1019950032863 A KR 1019950032863A KR 19950032863 A KR19950032863 A KR 19950032863A KR 970019622 A KR970019622 A KR 970019622A
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KR
South Korea
Prior art keywords
parameter
quantization
output
unit
variable length
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KR1019950032863A
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Korean (ko)
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KR100203637B1 (en
Inventor
김상호
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배순훈
대우전자 주식회사
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Priority to KR1019950032863A priority Critical patent/KR100203637B1/en
Publication of KR970019622A publication Critical patent/KR970019622A/en
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Publication of KR100203637B1 publication Critical patent/KR100203637B1/en

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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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
    • 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
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]

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

Abstract

본 발명은 전송할 영상의 화질을 높일 수 잇는 동영상을 부호화하는 장치에 관한 것으로서, 종래에는 제2파라메터 저장부(24)가 출력하는 파라메터가 자주 변하면 이때마다 저장부(26)는 새로운 파라메터를 가변 길이 부호화부(16)에 인가함으로써 결국, 거대 구획의 헤더비트량 증가로 최종적인 전송 비트량이 많아지게 되는 결점이 있으며, 또한, 양자화부(14)도 제2파라메터 저장부(24)가 출력하는 파라메터가 자주 변하면 이때마다 양자화 스케일을 다르게 해서 양자화하기 때문에 복원되는 화상의 화질이 떨어지게 되는 결점이 있었으나, 본 발명에서는 양자화 스케일을 결정하는 제2파라메터 계산부(64)의 출력인 파라메터의 변화빈도를 비교부(68)에서 절충시켜 조정하도록 해서 그 파라메터 변화에 따른 양자화부(54)의 양자화 스케일 및 가변 길이 부호화부(5)의 파라메터 전송을 제어함으로써 상기 결점을 개선시킬 수 있는 것이다.The present invention relates to an apparatus for encoding a video that can improve the quality of a video to be transmitted. In the related art, when a parameter output from the second parameter storage unit 24 changes frequently, the storage unit 26 changes the new parameter to a variable length. Applying to the encoder 16, there is a drawback that the final amount of transmitted bits increases due to an increase in the header bit amount of the macro block, and the quantization unit 14 also outputs the parameters output from the second parameter storage unit 24. If is frequently changed, the quality of the reconstructed image is deteriorated because the quantization scale is changed by different quantization at this time. The quantization scale and the variable length code of the quantization unit 54 according to the parameter change by making the adjustment in the section 68 to adjust. By controlling the parameters of the transfer unit 5 is capable of improving the above defects.

Description

동영상을 부호화하는 장치Device for encoding video

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

제2도는 본 발명에 따른 동영상을 부호화하는 장치의 일 실시예를 나타낸 블럭도.2 is a block diagram showing an embodiment of an apparatus for encoding a video according to the present invention.

Claims (2)

현재 입력되는 영상 신호와 움직임 보상된 영상 신호의 차이 신호를 출력하는 제1가산기(50)와, 상기 제1가산기(50)의 출력을 이산 코사인 변환해서 출력하는 이산 코사인 변환부(52)와, 상기 이산 코사인 변환부(52)의 출력을 양자화해서 출력하는 양자화부(54)와, 상기 양자화부(54)의 출력을 가변 길이 부호화해서 출력하는 가변 길이 부호화부(56)와, 상기 가변 부호화부(56)의 출력을 일시적으로 저장했다가 전송하기 위해 출력하는 버퍼(58)를 포함하는 동영상을 부호화하는 장치에 있어서, 현재 입력되는 영상 신호에 따른 거대 구획의 복잡도를 계산해 내는 복자도 계산부(60)와; 상기 버퍼(58)의 데이터 량에 따라서 레퍼런스 양자화 파라메터를 계산해 내는 제1파라메터 계산부(62)와, 상기 복잡도 계산부(60)의 복잡도와 상기 제1파라메터 계산부(62)의 레퍼런스 양자화 파라메터를 곱셈 연산시켜서 실제 양자화에 사용할 파라메터를 생성하여 출력하는 제2파라메터 계산부(64)와; 상기 제2파라메터 계산부(64)의 출력에 따른 이미 저장된 파라메터와 현재의 파라메터가 소정의 값만큼 차이가 날 경우, 현재의 파라메터를 상기 양자화부(54)에서 새로운 양자화 스케일로 사용하도록 하며, 상기 가변 길이 부호화부(56)에서는 전송하도록 하고 이를 새로이 저장시키기 위한 비교부(68)와; 상기 비교부(68)와 정보를 송수신해서 상기 비교부(68)에서 새로이 저장하고자 하는 파라메터를 저장하는 저장부(66)를 포함하여 이루어지는 동영상을 부호화하는 장치.A first adder 50 for outputting a difference signal between a currently input video signal and a motion compensated video signal, a discrete cosine converter 52 for outputting the discrete cosine transformed output of the first adder 50, A quantizer 54 for quantizing and outputting the output of the discrete cosine transformer 52, a variable length encoder 56 for variable length encoding the output of the quantizer 54, and the variable encoder A device for encoding a video including a buffer 58 for temporarily storing and outputting the output of 56, wherein the complex diagram calculating unit calculates the complexity of the macro block according to the video signal currently input. 60); The first parameter calculator 62 calculates a reference quantization parameter according to the amount of data in the buffer 58, the complexity of the complexity calculator 60 and the reference quantization parameter of the first parameter calculator 62. A second parameter calculator 64 which multiplies and generates and outputs a parameter to be used for actual quantization; When the previously stored parameter according to the output of the second parameter calculator 64 and the current parameter differ by a predetermined value, the current parameter is used as a new quantization scale in the quantization unit 54. In the variable length encoder 56, a comparison unit 68 for transmitting and storing the new data; And a storage unit (66) which transmits / receives information with the comparison unit (68) and stores new parameters to be stored in the comparison unit (68). 제1항에 있어서, 상기 비교부(68)의 소정의 값은 "3"임을 특징으로 하는 동영상을 부호화하는 장치.The apparatus of claim 1, wherein a predetermined value of the comparison unit (68) is "3". ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950032863A 1995-09-29 1995-09-29 Device for encoding video KR100203637B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950032863A KR100203637B1 (en) 1995-09-29 1995-09-29 Device for encoding video

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950032863A KR100203637B1 (en) 1995-09-29 1995-09-29 Device for encoding video

Publications (2)

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KR970019622A true KR970019622A (en) 1997-04-30
KR100203637B1 KR100203637B1 (en) 1999-06-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040007818A (en) * 2002-07-11 2004-01-28 삼성전자주식회사 Method for controlling DCT computational quantity for encoding motion image and apparatus thereof
KR100438856B1 (en) * 2001-06-14 2004-07-05 엘지전자 주식회사 By lively table quantum/requantum making for method and status
US9179165B2 (en) 2010-05-07 2015-11-03 Nippon Telegraph And Telephone Corporation Video encoding control method, video encoding apparatus and video encoding program
US9179149B2 (en) 2010-05-12 2015-11-03 Nippon Telegraph And Telephone Corporation Video encoding control method, video encoding apparatus, and video encoding program

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100438856B1 (en) * 2001-06-14 2004-07-05 엘지전자 주식회사 By lively table quantum/requantum making for method and status
KR20040007818A (en) * 2002-07-11 2004-01-28 삼성전자주식회사 Method for controlling DCT computational quantity for encoding motion image and apparatus thereof
US9179165B2 (en) 2010-05-07 2015-11-03 Nippon Telegraph And Telephone Corporation Video encoding control method, video encoding apparatus and video encoding program
US9179149B2 (en) 2010-05-12 2015-11-03 Nippon Telegraph And Telephone Corporation Video encoding control method, video encoding apparatus, and video encoding program

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Publication number Publication date
KR100203637B1 (en) 1999-06-15

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