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1. (WO2017039501) SPATIAL IMPROVEMENT OF TRANSFORM BLOCKS

Pub. No.:    WO/2017/039501    International Application No.:    PCT/SE2015/050919
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Sep 02 01:59:59 CEST 2015
IPC: H04N 19/176
H04N 19/122
H04N 19/61
H04N 19/86
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: ANDERSSON, Kenneth
WENNERSTEN, Per
Title: SPATIAL IMPROVEMENT OF TRANSFORM BLOCKS
Abstract:
Reconstructed prediction errors in a sub-portion (12) of a residual block (11) obtained by inverse transforming a transform block (10) are modified in order to spatially improve localized portions of the residual block (11), e.g. to compensate for visual artifacts from transform coding. The modification affects reconstructed prediction errors in the sub-portion (12) of the residual block (11) but not reconstructed prediction errors in a remaining portion of the residual block (11).