Open AccessClipping Prevention Scheme for MPEG Surround
Author(s) -
Pang HeeSuk
Publication year - 2008
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.08.0208.0088
Subject(s) - clipping (morphology) , bitstream , computer science , scheme (mathematics) , signal (programming language) , encoding (memory) , mpeg 2 , signal recovery , signal compression , mpeg 4 , degradation (telecommunications) , sound quality , electronic engineering , computer vision , computer hardware , signal processing , artificial intelligence , compressed sensing , speech recognition , telecommunications , decoding methods , engineering , coding (social sciences) , mathematics , digital signal processing , mathematical analysis , philosophy , linguistics , statistics , programming language
MPEG Surround has a potential clipping problem since its encoding is based on downmixing a multichannel signal. We propose a clipping prevention scheme for MPEG Surround, which is composed of modification and recovery processes of a downmix signal with recovery information conveyed in arbitrary downmix gains of an MPEG Surround bitstream. Experiments show that the proposed scheme effectively prevents sound quality degradation caused by clipping problems with negligible additional bit rates.