Patent ID: 8391373
Filing Date: 2013-03-05
Classification: G10L

Abstract:
1. A method of concealing transmission error in a digital signal chopped up into a plurality of successive frames associated with different time intervals in which, on reception, the signal may comprise erased frames and valid frames, the valid frames comprising information relating to the concealment of frame loss, wherein the method is implemented during a hierarchical decoding using a core decoding and a transform-based decoding using low-delay windows introducing a time delay of less than a frame with respect to the core decoding, and in that to replace at least the last frame erased before a valid frame, comprising steps of: concealing a first set of missing samples for the erased frame, implemented in a first time interval; concealing a second set of missing samples for the erased frame taking into account information of said valid frame and implemented in a second time interval; and transition between the first set of missing samples and the second set of missing samples so as to obtain at least a part of the erased frame.