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hdtv' a 140 mbit/s coded for 'contribution' quality coding

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 470
digitising the luminance and chrominance components of an hdtv signal results in a bit rate of about 1.2 gbit/s. for long-distance transmission an obvious goal is to reduce this bit rate by a factor of about 10 in order to fit into the current standard bit rate of 140 mbit/s. in order to maintain contribution quality for such bit-rate reduction factors, it is necessary to use a combination of techniques such as transform coding, motion-compensated interframe prediction and variable-length coding. the bbc, as part of the race hivits project (no. 1018) has participated in the construction of a such a 140 mbit/s codec for hdtv. this codec is based around a codec, that has also been developed within the hivits project and manufactured by thomson, for the coding of conventional-definition television within 34 mbit/s
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