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VERFAHREN ZUM SIGNALISIEREN EINER RAUSCHSUBSTITUTION BEIM CODIEREN EINES AUDIOSIGNALS

Noise substitution signalling method for audio signal coding - transforms timed audio signal into frequency range for obtaining spectral values which are grouped and detecting group affected by noise.
 
: Herre, J.; Gbur, U.; Ehret, A.; Dietz, M.; Teichmann, B.; Kunz, O.; Brandenburg, K.; Gerhaeuser, H.

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DE 1997-19730129 A: 19970714
DE 1997-19730129 A: 19970714
EP 1998-916947 AW: 19980313
WO 1998-EP1480 A: 19980313
EP 931386 B1: 20000705
DE 19730129 C2: 20020307
H03M0007
H04B0001
Deutsch
Patent, Elektronische Publikation
Fraunhofer IIS A ( IIS) ()

Abstract
The method involves grouping spectral values and detecting a group affected by noise. If a group is not noise affected a coding table out of several tables is allocated for redundancy coding of that group, while the coding table allocated to the group is referred to by a coding table number. If a group is noise affected, an additional coding table number, not referring to a coding table, is allocated to the group in order to signal that the group is noise affected and, therefore, will not be redundancy coded. USE - For digital video and audio coding according to moving picture expert group standards. ADVANTAGE - Provides extension of standard MPEG-2 AAC by facility for noise substitution without interfering with basic coding structure.

: http://publica.fraunhofer.de/dokumente/PX-38942.html