Method and apparatus for improving the quality of images for non

Details Method and apparatus for improving the quality of images for non Method and apparatus for improving the quality of images for non

1995-06-09

1998-05-19

Boudreau, Leo

Image analysis

Image compression or coding

Interframe coding

348420, 348409, G06K 936, H04N 712

Patent

active

057547009

ABSTRACT:
A method and apparatus for improving the quality of images for non-real time sensitive applications are disclosed. A preprocessing unit receives a first frame from a input line. The preprocessing unit calculates a difference value between the first frame and a previously-received-frame. The preprocessing unit sends the first frame to a buffer unit coupled to the preprocessing unit. The preprocessing unit sends the difference value to a statistics unit coupled to the preprocessing unit. Using the calculated difference value, the statistics unit determines whether the first frame contains a scene change. The statistics unit generates a strategy for encoding the first frame based on the criteria of whether the first frame contains a scene change and whether the first frame is used in a still image or a moving image. A video coder-decoder coupled to the statistics unit and the buffer unit receives the first frame and the strategy for encoding the first frame simultaneously. The video coder-decoder operates to encode the first frame using this strategy.

REFERENCES:
patent: Re35414 (1996-12-01), Murakami et al.
patent: 5267334 (1993-11-01), Mormille et al.
patent: 5311310 (1994-05-01), Jozawa et al.
patent: 5363139 (1994-11-01), Keith
patent: 5387938 (1995-02-01), Fukuda et al.

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