发明名称 |
BILDDATENKODIER/DEKODIERVERFAHREN UND -VORRICHTUNG |
摘要 |
<p>A highly efficient coding/decoding by subjecting image signals to orthogonal transformation, by which all data of interlace images, inclusive of scarce and rich types of images in motions and even a mixed type thereof, can be coded efficiently. A circuit (19) senses motion vectors in every macro-block between an odd-numbered field and an even-numbered field. A circuit (21) determines the coding mode (coding of every field or coding of every frame), according to the median of the motion vectors. A control circuit (16) controls gates (15, 17) and switches (6, 9, 10, 15) corresponding to the determined coding mode, and it generates a predictive image of every field or frame from buffer memories (7, 8). Circuits from a difference circuit (22) to a VLC circuit (25) calculate the difference data between an image to be coded and the predictive picture thereof, subject the difference data to discrete cosine transformation, and thereafter perform variable-length coding. Also, the VLC-circuit (25) sets the coding mode as a flag in the header of the predetermined hierarchy of a bit stream. <IMAGE></p> |
申请公布号 |
DE69227185(T2) |
申请公布日期 |
1999.04.01 |
申请号 |
DE1992627185T |
申请日期 |
1992.12.28 |
申请人 |
SONY CORP., TOKIO/TOKYO, JP |
发明人 |
YONEMITSU, JUN, SHINAGAWA-KU TOKYO 141, JP;YAGASAKI, YOICHI, SHINAGAWA-KU TOKYO 141, JP |
分类号 |
G06T9/00;H04N7/52;H04N7/54;H04N9/804;H04N19/112;H04N19/119;H04N19/126;H04N19/139;H04N19/15;H04N19/176;H04N19/189;H04N19/423;H04N19/46;H04N19/50;H04N19/51;H04N19/60;H04N19/625;H04N19/65;H04N19/70;H04N19/89;H04N19/91;(IPC1-7):H04N7/32 |
主分类号 |
G06T9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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