Television – Bandwidth reduction system – Data rate reduction
Patent
1997-03-18
2000-05-23
Britton, Howard
Television
Bandwidth reduction system
Data rate reduction
348584, 348598, H04N 726, H04N 5272
Patent
active
060671173
ABSTRACT:
An image signal processor wherein an image is divided spatially or on a time series basis into multiple units, and is encoded on the basis of the divided unit, in order for image transform processing such as cutting, insertion, and composing thereof, to be performed upon one or multiple encoded image signals, The system includes an object detection circuit 5 (25) for detecting from the image signals a block or field unit as an object of image transform processing local decoding circuits 3, 4 (23, 34) for locally decoding only the image signals of the block or field unit detected by the object detection circuit; a processing circuit 7 (27) for processing the image signals decoded by the local decoding circuits 3, 4, (23, 24); a local encoding circuit 8 (28) for locally encoding the image signals processed by the processing circuit 7 (27); and a composing circuit 9 (29) for composing both the image signals encoded by the circuit 8 (28) and original image signals. With the system, only the portion to be edited is locally decoded while the others are not decoded and remain as original image signals, so that the portion to be decoded is minimized and a high quality image can be maintained even though the image transform processing is repeated.
REFERENCES:
patent: 5164839 (1992-11-01), Lang
patent: 5559562 (1996-09-01), Ferster
patent: 5644364 (1997-07-01), Kurtz
patent: 5649046 (1997-07-01), Stewart
Britton Howard
OKI Electric Industry Co., Ltd.
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