KR960028437A - 영상 데이타 부호화장치 - Google Patents

영상 데이타 부호화장치 Download PDF

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KR960028437A
KR960028437A KR1019940034106A KR19940034106A KR960028437A KR 960028437 A KR960028437 A KR 960028437A KR 1019940034106 A KR1019940034106 A KR 1019940034106A KR 19940034106 A KR19940034106 A KR 19940034106A KR 960028437 A KR960028437 A KR 960028437A
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image data
unit
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quantization step
control signal
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임종태
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배순훈
대우전자 주식회사
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Priority to US08/571,568 priority patent/US5638126A/en
Priority to JP34776595A priority patent/JP3814321B2/ja
Priority to CN95120435A priority patent/CN1101108C/zh
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    • 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
    • H04N19/174—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 slice, e.g. a line of blocks or a group of blocks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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    • 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
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    • 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
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    • 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
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    • 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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    • 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
    • H04N19/197—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 including determination of the initial value of an encoding parameter
    • H—ELECTRICITY
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    • 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
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    • 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
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Abstract

본 발명에 따른 영상 데이타 부호화장치는 프레임 첫부분의 영상 데이타는 바로 이전 프레임의 맨 마지막 부분에서 발생된 데이타량에 근거한 QP를 사용하는 것이 아니라, 바로 이전 프레임의 두번째 슬라이스에서 발생된 데이타에 근거한 QP를 사용함으로서 보다 합리적이고 우수하게 영상 데이타를 압축할 수 있는데, 양자화 스텝사이즈 파라미터(Quantization Step-size Parameter: QP)에 따라서 입력된 영상 데이타 양자화하고, 양자화된 데이타를 부화화(coding)하여 출력하는 부호화부와, 상기 부호화부로 부터 제공되는 데이타를 일시적으로 기록한 후 일정한 비율로 출력하는 버퍼부와, 상기 버퍼부로부터 버퍼 점유도(B)를 검출하고, 상기 버퍼 점유도(B)에 따라서 조절된 양자화 스텝사이즈 파라미터(QP)를 출력하는 데이타 발생량 조절부와, 제1제어신호(C1)에 응답하여, 상기 데이타 발생량 조절부로 부터 제공되는 양자화 스텝사이즈 파라미터(QP)를 기록하고, 제2 제어신호(C2)에 응답하여, 상기 기록된 양자화 스텝사이즈 파라미트(QP)를 출력하고 리셋되는 메모리부와, 상기 부호화부와 동일하게 영상데이타를 입력받으며, 프레임 단위의 영상 데이타 입력 시작을 알리는 스타트 신호에 응답하여, 제2 제어신호(C2)를 출력하고, 현재 입력되는 영상 데이타의 위치가 현재 프레임의 기설정된 위치인 경우 제1제어신호(C1)를 출력하는 제어부와, 상기 데이타 발생량 조절부로 부터 제공된 양자회 스텝사이트 파라미터(QP)를 상기 부호화부로 출력하되, 상기 제2제어신호(C2)가 입력되는 경우는 상기 메모리부로 부터 제공되는 양자화 스텝사이즈 파라미터(QP)를 상기 부호화부로 출력하는 선택부를 포함한다.

Description

영상 데이타 부호화장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 양자화 스텝사이즈 파라미터 조절부를 갖는 본 발명에 따른 영상 데이타 부호화장치의 동작을 도식적으로 설명하기 위한 블럭도.

Claims (2)

  1. 양자화 스텝사이즈 파라미터(Quantization Step-size Parameter: QP)에 따라서 입력된 영상 데이타 양자화하고, 양자화된 데이타를 부호화(coding)하여 출력하는 부호화부와; 상기 부호화부로 부터 제공되는 데이타를 일시적으로 기록한 후 일정한 비율로 출력하는 버퍼부와; 상기 버퍼부로 부터 버퍼 점유도(B)를 검출하고, 상기 버퍼 점유도(B)에 따라서 조절된 양자화 스텝사이즈 파라미터(QP)를 출력하는 데이타 발생량 조절부와; 제1 제어신호(C1)에 응답하여, 상기 데이타 발생량 조절부로 부터 제공되는 양자화 스텝사이즈 파라미터(QP)를 기록하고, 제2 제어신호(C2)에 응답하여, 상기 기록된 양자화 스텝사이즈 파라미트(QP)를 출력하고 리셋되는 메모리부와; 상기 부호화부와 동일하게 영상 데이타를 입력받으며, 프레임 단위의 영상 데이타 입력 시작을 알리는 스타트 신호에 응답하여, 제2 제어신호(C2)를 출력하고, 현재 입력되는 영상 데이타의 위치가 현재 프레임의 기설정된 위치인 경우 제1제어신호(C1)를 출력하는 제어부와; 상기 데이타 발생량 조절부로 부터 제공된 양자회 스텝사이트 파라미터(QP)를 상기 부호화부로 출력하되, 상기 제2 제어신호(C2)가 입력되는 경우는 상기 메모리부로 부터 제공되는 양자화스텝사이즈 파라미터(QP)를 상기 부호화부로 출력하는 선택부를 포함하는 영상 데이타 부호화장치.
  2. 제1항에 있어서, 상기 제어부는 현재 입력되는 영상 데이타가 현재 프레임의 두번째 슬라이스(Slice)에 위치하는 경우 상기 제1 제어신호(C1)를 출력하는 영상 데이타 부호화장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940034106A 1994-12-14 1994-12-14 영상 데이타 부호화 장치 KR0170937B1 (ko)

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KR1019940034106A KR0170937B1 (ko) 1994-12-14 1994-12-14 영상 데이타 부호화 장치
US08/571,568 US5638126A (en) 1994-12-14 1995-12-13 Method and apparatus for deciding quantization parameter
JP34776595A JP3814321B2 (ja) 1994-12-14 1995-12-14 量子化パラメータ決定装置及び方法
CN95120435A CN1101108C (zh) 1994-12-14 1995-12-14 判定量化参数的方法及装置

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KR0134343B1 (ko) * 1993-04-13 1998-04-29 김광호 양자화레벨을 이용한 부호화방법 및 그 장치
KR950010632A (ko) * 1993-09-17 1995-04-28 배순훈 동영상부호화기

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100493854B1 (ko) * 1995-10-26 2005-08-04 주식회사 팬택앤큐리텔 물체중심부호화에서의양자화방법

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CN1138805A (zh) 1996-12-25
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CN1101108C (zh) 2003-02-05
JP3814321B2 (ja) 2006-08-30
US5638126A (en) 1997-06-10

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