Television – Bandwidth reduction system – Data rate reduction
Patent
1995-05-08
1998-09-22
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348415, 348411, 348412, 348699, H04N 900
Patent
active
058121978
ABSTRACT:
An MPEG based video signal compression system reduces picture degradation caused by sub-optimal selection of a prediction mode. A disclosed method produces a compressed video output signal from a video input signal. The video input signal is converted (57) into pixel blocks. Then, a plurality of predicted blocks are formed (60) as representations of an input block. Each predicted block is produced by a different prediction function and has an associated Correlation Factor CF which indicates the degree of correlation between the input block and a predicted block. This factor is obtained (35) by subtracting a measure of a low frequency varying correlation component from an index of correlation. The Correlation Factors are compared (45), and a compressed block associated with the predicted block with the lowest CF value is selected as an output block. This process is repeated for the other input blocks, and the selected compressed output blocks are combined to form the output signal. The decision factor, CF, improves prediction mode selection and image motion estimation in the presence of image fading without the need for fading detection circuitry.
REFERENCES:
patent: 5091782 (1992-02-01), Krause et al.
patent: 5283645 (1994-02-01), Alattar
patent: 5373329 (1994-12-01), Niitsu
patent: 5387938 (1995-02-01), Fukuda et al.
patent: 5424779 (1995-06-01), Odaka
patent: 5504530 (1996-04-01), Obikane et al.
patent: 5506622 (1996-04-01), Kim
patent: 5510840 (1996-04-01), Yonemitsu et al.
patent: 5526295 (1996-06-01), Astle
patent: 5535288 (1996-07-01), Chen et al.
patent: 5543843 (1996-08-01), Kato et al.
patent: 5543846 (1996-08-01), Yagasaki
patent: 5543848 (1996-08-01), Murakami et al.
patent: 5565921 (1996-10-01), Sasaki et al.
Application Serial No. 08/329,553, filed Oct. 26, 1994, Art Group 2615, A System For Coding A Video Signal In The Presence Of An Image Intensity Gradient--P. P. Polit.
Chan Ming Hong
Savatier Tristan
Burke Alexander J.
Chin Tommy P.
Kurdyla Ronald H.
Rao Anand S.
Thomson Consumer Electronics Inc.
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