KR970702667A - 디지탈 영상 신호를 전송하고 수신하는 장치 (Arrangement for decoding digital video signals) - Google Patents

디지탈 영상 신호를 전송하고 수신하는 장치 (Arrangement for decoding digital video signals) Download PDF

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KR970702667A
KR970702667A KR1019960705834A KR19960705834A KR970702667A KR 970702667 A KR970702667 A KR 970702667A KR 1019960705834 A KR1019960705834 A KR 1019960705834A KR 19960705834 A KR19960705834 A KR 19960705834A KR 970702667 A KR970702667 A KR 970702667A
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프리츠 로젠그렌 위르겐
비헬름 요안 요제프 사아이스 로날드
헨드릭 요제프 페르손 에릭
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    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
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    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
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Abstract

본 발명은 보조 신호를 압축 디지탈 영상 신호 (MPEG)로 부터 유도하는 장치에 관한 것이다. 보조 신호는 주 신호의 선택된 부분, 예를 들어 Ⅰ 화상의 DC 계수, 또는 언스크랩블링된 부분을 포함한다. 따라서, 보조신호는 (다중) 대화상 텔레비젼 수상기에서 디스플레이하기 위해 이용되거나 또는 계약저를 지분화하고 유저에게 재촉하기 위한 “애퍼타이저”로서 이용될 수 있다. 보조 신호는 디지탈 영상신호기록/재생수단에서 분리 기록되어, 테이프상에 스크랩블링된 프로그램의 시작 위치를 찾는 유저를 지원할 수 있다. 또한 보조 신호는 전송단에서 생성되어, 저 비트레이터로 전송될 수 있다. 이러한 보조 신호를 복호화하는 디코더는 풀스펙 MPEG 디코더보다 꽤 구조상 단순하고 저렴하다.

Description

디지탈 영상 신호를 전송하고 수신하는 장치(Arrangement for decoding digital video signals)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (18)

  1. MPEG 기초 영상 스트림인 암호화된 디지탈 영상 신호를 복호화하는 장치에 있어서, 상기 기초스트림의 선택된 부분을 복호화하는 수단과, 상기 선택된 부분을 재배열하여 보조 영상 신호를 구성하는 수단을 구비하는 것을 특징으로 하는 복호화장치.
  2. 제1항에 있어서, 상기 영상 신호가 각기 DC 계수를 갖는 변형된 부호화 블록을 포함하는 자율적으로 암호화되고, 예측적으로 암호화된 화상을 포함하는 경우, 상기 암호화된 부분은 자율적으로 암호화된 화상의 DC 계수인 것을 특징으로 하는 복호화장치.
  3. 제1항 또는 제2항에 있어서, 상기 영상 신호는 스크램블링된 부분과 언스크램블링된 부분을 포함하고, 상기 선택된 부분은 영상 신호의 언스크램블링 부분인 것을 특징으로 하는 복호화장치.
  4. 주 화상을 나타내는 제1영상 신호와 대화상을 나타내는 제2영상 신호를 수신하는 수단을 구비하는 텔리비젼 수상기에 있어서, 제2영상 신호를 복호화하는 제1, 2 또는 3항에서 청구한 바와 같은 장치와 대화상으로서 상기 보조신호를 디스플레이하는 수단을 구비하는 것을 특징으로 하는 텔레비젼 수상기.
  5. 다수의 영상 신호를 수신하는 수단을 구비하는 텔레비젼 수상기에 있어서, 각 영상 신호를 복호화 하는 제1, 2 또는 3항에서 청구한 바와 같은 장치와 각 보조신호를 모자이크식으로 연속적으로 디스플레이하는 수단을 구비하는 것을 특징으로 하는 텔레비젼 수상기.
  6. 제5항에 있어서, 디스플레이된 보조 화상중 한 화상을 선택하며, 선택된 보조 화상이 유도되는 영상 신호를 선택하고 디스플레이하는 데 이용되는 제어수단을 더 구비하는 것을 특징으로 하는 텔레비젼 수상기.
  7. 영상 신호를 기록하고 재생하는 영상신호기록/재생수단에 있어서, 각 영상 신호를 복호화하는 제1, 2 또는 3항에서 청구한 바와 같은 장치와 상기 보조신호를 각각기록하고 재생하는 수단을 구비하는 것을 특징으로 하는 영상신호기록/재생수단.
  8. MPEG 기초 영상 스트림으로서 암호화된 디지탈 영상 신호를 전송하는 전송기에 있어서, 각 영상 신호를 복호화하는 제1, 2 또는 3항에서 청구한 바와 같은 장치와 더욱이 기초 영상 스트림으로서 보조신호를 전송하는 수단을 구비하는 것을 특징으로 하는 텔레비젼 수상기.
  9. 제1MPEG 기초 영상 스트림인 암호화된 디지탈 신호를 포함하는 디지탈 텔레비젼 신호에 있어서, 상기 제1기초 영상 스트림의 선택된 부분을 포함하는 보조 기초 영상 스트림이 포함되고, 상기 선택된 부분은 재배열되어 보조 영상 신호를 구성하는 것을 특징으로 하는 디지탈 텔리비젼 신호.
  10. 제9항에 있어서, 제1기초 스트림이 각기 DC계수를 갖는 변형된 부호화 블록을 포함하는 자율적으로 암호화되고, 예측적으로 암호화된 화상을 포하하는 경우, 상기 선택된 부분은 자율적으로 암호화된 화상의 DC계수인 것을 특징으로 하는 디지탈 텔레비젼 신호.
  11. 제9항 또는 10항에 있어서, 제1기초 스트림은 스크램블링된 부분과 언스크램블링된 부분을 포함하고 상기 선택된 부분은 상기 신호의 언스크림블링된 부분인 것을 특징으로 하는 디지탈 텔리비젼 신호.
  12. 텔레비젼 수상기에 있어서, 제9, 10 또는 11항에서 청구한 바와 같은 디지탈 텔레비젼 신호를 수신하는 수단과, 보조 영상 스트림을 복호화하는 수단과, 대화상으로서 상기 보조 영상 신호를 디스플레이하는 수단에 의해 특징되는 텔레비젼 수상기.
  13. 텔레비젼 수상기에 있어서, 제9, 10 또는 11항에서 청구한 바와 같은 다수의 디지탈 신호를 수신하는 수단과, 보조 영상 스트림을 복호화하는 수단과, 대화상으로서 상기 보조 영상 신호를 디스플레이하는 수단에 의해 특징되는 텔레비젼 수상기
  14. 제13항에 있어서, 디스플레이된 보조 화상중 한 화상을 선택하며, 선택된 보조 화상이 유도되는 영상 신호를 선택하고 디스플레이 하는 데 이용되는 제어수단을 더 구비하는 것을 특징으로 하는 텔레비젼 수상기.
  15. 영상 신호를 기록하고 재생하는 영상신호기록/재생수단에 있어서, 제9, 10 또는 11항에서 청구한 바와 같은 디지탈 영상 신호를 수신하는 수단과, 보조 영상 스트림을 각각 기록하고 재생하는 수단에 의해 특징되는 영상신호기록/재생수단.
  16. MPEG 기초 영상 스트림으로서 암호화된 영상 신호를 복호화 하는 방법에 있어서, 상기 기초 스트림의 선택된 부분을 암호화하고, 상기 선택된 부분을 재배치하여 보조 영상 신호를 구성하는 것을 특징으로 하는 영상 신호 복호화 방법.
  17. 제16항에 있어서, 각기 DC 계수를 갖는 변형 부호화 블록을 포함하는 자율적으로 암호화되고, 예측적으로 암호화된 화상을 포함하는 경우, 상기 선택된 부분은 자율적으로 암호화된 화상의 DC계수인 것을 특징으로 하는 영상 신호 복호화 방법.
  18. 제16항 또는 17항에 있어서, 영산 신호는 스크램블링된 부분과 언스크램블링된 부분을 포함하고 상기 선택된 부분은 상기 신호의 언스크램블링된 부분인 것을 특징으로 하는 영상 신호 복호화 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960705834A 1994-04-15 1995-04-10 디지탈영상신호송수신장치 KR100461207B1 (ko)

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US6041068A (en) 2000-03-21
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