Deblocking filter conditioned on pixel brightness

Details Deblocking filter conditioned on pixel brightness Deblocking filter conditioned on pixel brightness

2005-06-14

2005-06-14

An, Shawn S. (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240240, C375S240120, C375S240140, C375S240260, C375S240180, C382S233000, C382S236000, C382S238000, C382S239000, C382S248000, C382S251000

Reexamination Certificate

active

06907079

ABSTRACT:
An encoder, decoder, and corresponding method are disclosed for encoding pixel data as a plurality of block transform coefficients and decoding encoded block transform coefficients to provide reconstructed pixel data, the encoder and/or decoder includes a conditional deblocking filter for filtering only block transitions meeting pre-selected pixel brightness level criteria, where the conditional deblocking filter method includes receiving at least one first pixel adjacent to a block transition, providing a signal indicative of the brightness of the at least one first pixel, comparing the brightness signal with at least one of an upper brightness threshold and a lower brightness threshold, and conditionally filtering a plurality of adjacent pixels including the first pixel at the block transition in response to the brightness comparison.

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