Channel signal concealment in multi-channel audio systems
Номер патента: EP1649452A1
Опубликовано: 26-04-2006
Автор(ы): Stefan Bruhn
Принадлежит: Telefonaktiebolaget LM Ericsson AB
Опубликовано: 26-04-2006
Автор(ы): Stefan Bruhn
Принадлежит: Telefonaktiebolaget LM Ericsson AB
Реферат: A parametric model (25) is used for error concealment. The model filter (25) allows for recovering signal components (x; (n)) of original audio channel signals that now are lost or erroneous from signal components (m-i(n)) of at least one other audio channel. During error-free reception of valid frames, the parameters (h1(n)) of that model will be derived and stored (24). In case of frame loss or frame error affecting the multi-channel information, a conjecture of the missing information is recovered by applying the model, using the stored parameters (hi(n)). In case of several subsequent lost or erroneous frames, it is possible either to use the parameters derived during the last valid frame or to use parameters derived from the recovered multi-channel information of the respective previous invalid frame. Furthermore, if there are long sequences of lost frames, it can be beneficial to apply some gradual muting of the model parameters, which essentially results in a gradual muting of the model parameters.
Multi-channel audio decoder, multi-channel audio encoder, methods and computer program using a residual-signal-based adjustment of a contribution of a decorrelated signal
Номер патента: CA2918864A1. Автор: Andreas Holzer,Johannes Hilpert,Sascha Dick,Christian Helmrich. Владелец: Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV. Дата публикации: 2015-01-29.