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专利名称：Picture signal coding and decoding发明人：Obikane, Nobuhisa, c/o Patents
Division,Tahara, Katsumi, c/o PatentsDivision,Yagasaki, Yoichi, c/o PatentsDivision,Yonemitsu, Jun, c/o PatentsDivision,Suzuki, Teruhiko, c/o PatentsDivision
申请号：EP93304968.6申请日：19930624公开号：EP0576290A2公开日：19931229
专利附图：
摘要：Picture signal coding and decoding methods and apparatus are disclosed fordisplaying a coded interlace signal of a high definition television system on a televisionreceiver of a standard definition system. In an encoder, picture element data are
processed by DCT processing to obtain 8 x 8 coefficient data, and the coefficient data aretransmitted. In a decoder, of the 8 x 8 coefficient data, only 4 x 4 coefficient data at theleft upper corner are sampled out and processed by IDCT processing to obtain originalpicture element data. In the IDCT processing, some of the 4 x 4 coefficient data arereplaced by coefficient data of the 8 x 8 coefficient data outside said 4 x 4 block.
申请人：SONY CORPORATION
地址：6-7-35 Kitashinagawa Shinagawa-ku Tokyo JP
国籍：JP
代理机构：Robinson, Nigel Alexander Julian
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