Patent ID: 7471726
Filing Date: 2008-12-30
Classification: G10L,H04N

Abstract:
1. A digital media signal processing system comprising: a block transform-based codec for compressively encoding transform-coding blocks of a digital media signal to form a compressed representation of the digital media signal at encoding, and to decode blocks from the compressed representation to reconstruct the digital media signal at decoding; a pre-processing filter for applying to overlapping blocks that overlap adjacent of the transform-coding block of the digital media signal prior to encoding by the block transform-based codec to effect spatial-domain lapped transform of the digital media signal; and a post-processing filter for applying to overlapping blocks that overlap adjacent of the decoded blocks after decoding by the block transform-based codec, wherein the post-processing filter is not an inverse of the pre-processing filter, wherein the pre-processing filter is more relaxed and the post-processing filter is more aggressive relative to filters that are respectively inverses of the other.