Television – Bandwidth reduction system – Data rate reduction
Patent
1997-12-02
2000-07-25
Boudreau, Leo H.
Television
Bandwidth reduction system
Data rate reduction
348413, 348699, 382239, H04N 712
Patent
active
060942258
ABSTRACT:
A method for encoding mode signals of a target block of M.times.N pixels having a binary value `0` or `255` is provided. If the target block is determined as neither "all.sub.-- 0" nor "all.sub.-- 255", either a frame-based coding or a field-based coding is selected to generate a coding mode signal, wherein the frame-based coding represents the target block is encoded on an M.times.N pixels basis and the field-based coding represents the target block is encoded on an M/2.times.N pixels basis, and a base mode of the target block based on the "all.sub.-- 0", "all.sub.-- 255" and/or the coding mode signal. If the frame-based coding is selected, a frame mode is generated. On the contrary, if the field-based coding is selected, the frame is divided into a top and a bottom fields so that a top mode for the top field and a modified bottom mode for the bottom field are obtained, wherein a bottom mode is modified by the top mode to be the modified bottom; and the top mode and the modified bottom mode are attached to be a field mode.
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Boudreau Leo H.
Daewoo Electronics Co. Ltd.
Desire Gregory
LandOfFree
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