Television – Bandwidth reduction system – Data rate reduction
Patent
1993-06-14
1995-02-28
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348413, 348402, 348416, H04N 7133, H04N 7137
Patent
active
053941900
ABSTRACT:
A field to be encoded is divided into blocks. Then, first, second, and third motion vectors relative to data of a block of the field to be encoded are calculated from data of an m-th preceding field (m: even), data of an n-th preceding field (n: odd), and data of an interpolated image produced from the n-th preceding field. First, second, and third prediction signals are produced from the first motion vector and the m-th preceding field data, the second motion vector and the n-th preceding field data, and the third motion vector and the interpolated image data, respectively. In succession, a first difference signal between the first prediction signal and the block data to be encoded, a second difference signal between the second prediction signal and the block data to be encoded, and a third difference signal between the third prediction signal and the block data to be encoded are calculated and compared each other. As a result of comparison, one of the first, second, and third difference signals is selected and encoded.
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Chin Tommy P.
Le Vu
Matsushita Electric - Industrial Co., Ltd.
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