Adaptive block classification scheme for encoding video images

Details Adaptive block classification scheme for encoding video images Adaptive block classification scheme for encoding video images

1995-09-29

1998-09-29

Peeso, Thomas

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358539, 382166, 382236, H04N 1413

Patent

active

058156704

ABSTRACT:
Blocks of video frames are classified for encoding, for example, as empty blocks, inter blocks, or Intra blocks. This block classification is based on (at least) one statistical measure for each block. The classification is based on a comparison of the statistical measure for each block to a threshold value, but the threshold value can change, for example, from block to block or from frame to frame. In a preferred embodiment, the threshold values change as quantization (Q) level changes. In embodiments in which more than one statistical measure is used for block classification of each block, the more than one corresponding threshold values change as Q level changes.

REFERENCES:
patent: 5440344 (1995-08-01), Asamura et al.
patent: 5488570 (1996-01-01), Agarwal
patent: 5585944 (1996-12-01), Rodriguez

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