KR870011805A - 화상부호화 전송방법 및 장치 - Google Patents

화상부호화 전송방법 및 장치 Download PDF

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KR870011805A
KR870011805A KR870004872A KR870004872A KR870011805A KR 870011805 A KR870011805 A KR 870011805A KR 870004872 A KR870004872 A KR 870004872A KR 870004872 A KR870004872 A KR 870004872A KR 870011805 A KR870011805 A KR 870011805A
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signal
circuit
vector
transmission
differential
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KR910000707B1 (ko
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히로아기 기구지
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시기 모리야
미쓰비시덴기 가부시기 가이샤
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Priority claimed from JP61309573A external-priority patent/JPS63160485A/ja
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Abstract

내용 없음

Description

화상부호화 전송방법 및 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제4도는 본 발명의 제1실시예의 차동펄스 변조방식의 송신측의 구성도.
제5도는 제4도에 있어서 임계값 보정회로의 구성도.
제6도는 본 발명의 제1실시예의 차동 펄스 변조방식의 수신측의 구성도.

Claims (8)

  1. 예측 오차신호와 임계값을 비교해서 변화 검출신호와 차동신호를 생성하여, 이 변화 검출신호와 차동신호를 양자화하여 송수신하는 차동펄스 변조방식에 있어서, 상기 차동신호의 극성을 판정을 행하고, 이 판정에 따라서 상기 임계값에 극성을 가해, 이 극성을 가한 유극 임계값에 따라서 상기 차동신호의 보정을 행하고, 이 보정된 보정 차동신호를 양자화하여 송수신하는 것을 특징으로 하는 차동펄스 변조방식.
  2. 특허청구의 범위 제1항에 있어서, 상기 보정 차동신호는 차동신호에서 유극 임계값을 계산하여 생성되는 것을 특징으로 하는 차동펄스 변조방식.
  3. 디지털 입력신호를 차동펄스 변조를 사용해서 테이타 압축전송을 행하는 송신회로와, 그 송신회로에 대응하는 수신회로를 갖는 차동펄스 변조방식을 사용한 테이타 압축 전송장치에 있어서, 상기 송신회로는, 디지털 입력신호를 예측하는 예측신호를 산출하는 예측회로와, 상기 입력신호와 예측 신호와의 차인 예측 오차신호와 송신 데이타량의 평활화를 행하는 임계값에서 차동신호를 출력하는 변화 검출회로와, 상기 차동신호를 양자화하는 양자화 회로와, 양자화된 송신신호를 일시적으로 축적하는 송신 버퍼회로와, 상기 임계값을 발생하고 또는 제어하는 임계값 발생회로와, 상기 예측신호를 산출하기 위해 양자화신호를 국부적으로 복호화하는 국부 복호화 회로를 포함하고, 상기 수신회로는, 수신회로를 일시적으로 축척하는 수신 버퍼회로와, 수신회로를 복호화하는 국부 복호화회로와, 그 복호화 신호와 예측신호에서 재생신호를 산출하는 가산기를 포함하고, 상기 양자화회로는, 여러개의 양자화 특성을 가지며, 그 양자화 특성을 상기 임계값에 의해 선택되는 특성 선택회로를 포함하는 적응 양자화회로로 되고, 상기 송신회로 및 수신회로중의 국부 복호화회로는, 양자화회로에 대응하여 여러개의 복호화 특성을 갖고, 그 복호화 특성을 상기 임계값에 의해 선택하는 특성 선택회로를 포함하는 적응 국부복호화 회로로 되는 것을 특징으로 하는 차동 펄스 변조방식을 사용한 데이터 압축 전송장치.
  4. 특허청구의 범위 제3항 기재의 차동펄스 변조방식을 사용한 데이터 압축 전송장치에 있어서, 상기 양자화 회로에서 선택되는 양자화 특성은 무효 데이터 범위내(대응하는 임계값의 지정 범위내)인 차동신호의 양자화 출력이 "0"으로 되는 것과 같은 특성인 것을 특징으로 하는 차동펄스 변조방식을 사용한 데이터 압축 전송장치.
  5. 화상신호를 서브샘플하여 화소비율에 따라서 화상신호에서 화소수를 빼내는 것과 동시에, 각 화소신호를 n차원의 입력벡터로 형성하는 양자화처리 순위로 각각 격납하는 것과 함께, 각 처리 주기마다 반복하여 리드하는 입력 버퍼군과, 사전에 입력벡터의 확률분포에 대응한 출력벡터를 준비하여 인덱스 입력에 따라서 해당 출력벡터를 선택 출력하는 벡터 출력회로 및 상기 입력벡터와 선택출력된 출력벡터와의 거리를 연산하는 왜곡 연산회로에서 구성되어 각 버퍼 대응에 구비한 여러개의 부호화부와, 그 각 부호화부에서 출력되는 거리 연산값과 입력벡터에 따라 다음 기간 처리 주기에 있어서 인덱스를 생성하여 각 벡터출력회로로 송출하는 인덱스출력 생성수단과, 상기 생성된 인덱스에서 양자화기의 인덱스를 생성하여 출력하는 양자화 인덱스 출력회로를 구비한 것을 특징으로 하는 벡터 양자화기.
  6. 화상 입력신호의 화상상 접근한 위치에 있는 화소를 여러개씩 모아서 블록화하여, 그 블록마다 벡터신호를 작성해서 출력하는 전ㆍ처리행정과, 현 벡터신호의 1프레임전의 1화상분의 벡터신호가 기억되어 있는 프레임 메모리에서 현 입력블럭과 동일위치에 있는 블록을 포함하는 여러개의 참조블럭을 작성하여, 각각 참조 벡터신호를 산출하여, 상기 벡터신호와 상기 참조 벡터신호와의 왜곡 연산을 행하여, 최소 왜곡 연산인 블럭을 선택하여, 그 선택된 블록의 위치 정보를 출력하는 움직임 보상처리 행정과, 상기 입력블럭과 상기 선택블럭을 차 연산하여 차동 벡터신호를 산출하여, 그 차동 벡터신호의 평균값 및 분산이 임계값의 범위내일 경우는 선택블럭의 위치 정보만을 부호화하여 부호화신호를 산출해서 전송버퍼로 송출하고, 그 차동백터신호의 평균값 및 분산이 임계값의 범위 바깥일 경우는 선택블럭의 위치 정보 및 차동 벡터신호를 부호화하여 부호화 신호를 전송버퍼로 송출하는 부호화처리 행정과, 상기 임계값을 상기 전송버퍼에 일시 기억된 부호화 신호량에 의해 제어하여, 그 부호화 신호량이 많을때는 임계값을 작게하고, 부호화 정보량이 적을때는 임계값을 크게하는 임계값 제어행정으로 되는 화상부호화 전송방법에 있어서, 상기 움직임 보상처리행정에서 현 입력블럭과 상기 선택블럭과의 거리를 산출하여, 상기 임계값 제어를 상기 거리에 따라서 상기 거리가 떨어져 있을때는 임계값을 작게하도록 제어하는 보조 임계값 제어 행정을 포함하는 것을 특징으로하는 화상 부호화 전송방법.
  7. 특허청구의 범위 제6항에 있어서, 상기 차동 벡터신호의 절대값 합을 산출하여, 그 절대값 합과 상기 임계값을 사용하는 것을 특징으로 하는 부호화 전송방법.
  8. 화상 입력신호를 아날로그/디지탈 변환하여 그 디지털 신호를 1프레임마다 프레임 메모리에 기억하는 전 처리행정과, 임계값등의 부호화 제어 파라미터에 따라 상기 디지털 신호의 평활화를 행하여, 그 평활화된 신호의 부호화를 행하는 부호화 처리 행정과, 부호화 신호를 1프레임마다 전송버퍼에 일시 기억하여 전송제어장치에 송출하는 송신 제어처리 행정과, 상기 송신버퍼에 일시 기억된 전 프레임의 부호화 신호량에 따라서 상기 부호화 제어 파라미터를 제어하는 부호화 제어 파라미터 제어행정을 포함하는 화상 부호화 전송 방법에 있어서, 상기 프레임 메모리에 기억된 현 디자탈 신호의 일부를 추출하여 전 프레임의 부호화 신호량에 따라서 산출된 상기 부호화 제어 파라미터에 따라서 가부호화를 행하고, 그 가부호화된 가부호화 신호량을 근거로 부호화 제어 파라미터를 수정하여 최적값에 접근시키는 보조 부호화 제어 파라미터 제어 행정을 포함하는 것을 특징으로하는 화상 부호화 전송방법.
    ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870004872A 1986-05-26 1987-05-18 화상 부호화 전송방법 및 장치 KR910000707B1 (ko)

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JP12037186A JPS62276927A (ja) 1986-05-26 1986-05-26 差分パルス変調方式
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JP61140890A JPS62296633A (ja) 1986-06-17 1986-06-17 差分パルス変調方式を用いたデ−タ圧縮伝送装置
JP61-293144 1986-12-09
JP293144 1986-12-09
JP61293144A JPS63146516A (ja) 1986-12-09 1986-12-09 ベクトル量子化器
JP61-309573 1986-12-24
JP61309573A JPS63160485A (ja) 1986-12-24 1986-12-24 画像符号化伝送方法
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