VERFAHREN ZUM SIGNALISIEREN EINER RAUSCHSUBSTITUTION BEIM CODIEREN EINES AUDIOSIGNALS
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.
DE 1997-19730129 A: 19970714