Image analysis – Image compression or coding – Adaptive coding
Reexamination Certificate
2007-04-03
2007-04-03
Bella, Matthew C. (Department: 2624)
Image analysis
Image compression or coding
Adaptive coding
C382S244000, C382S240000, C382S248000, C375S240000, C375S240030
Reexamination Certificate
active
11260650
ABSTRACT:
The present invention relates to regulating the quality and/or bitrate of content within mixed content video when the video is compressed subject to a bitrate constraint. For example, a screen capture encoder encodes palletized content within a frame of screen capture video. Subject to an overall bitrate constraint, the encoder then allocates bits for continuous tone content within the frame. By controlling the allocation of bits used to encode the continuous tone content, the encoder regulates bitrate for the continuous tone content. This in turn can allow the encoder to regulate spatial quality and/or overall temporal quality for the video. In one scenario, for screen capture video encoded to a (relatively) constant overall bitrate, the screen capture encoder reduces the bitrate (and quality) of the continuous tone content, instead spending bits to increase the overall frame rate of the video.
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Bayat Ali
Bella Matthew C.
Klarquist & Sparkman, LLP
Microsoft Corporation
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