Patent ID: 6687670
Filing Date: 2004-02-03
Classification: G10L,H04L

Abstract:
A method for detecting and concealing errors in a digital audio receiver which processes coded digital audio signals in frames of predetermined shape, comprising the steps of:storing several successive frames in memory, selecting one frame stored in memory as the current frame, examining the current frame for errors, concealing errors detected in the current frame using values obtained from the corresponding parts of other corrected or correctly received frames preceding or succeeding the current frame in the window, and wherein decoding and concealing are performed by the steps of: storing the last received frame undecoded whereafter it is decoded, decoding in the first stage a first part of the frame to be decoded, examining in the second stage whether the part of the current frame that correspond to said first part contains errors, said current frame being different than said frame to be decoded, decoding in the third stage a second part of the frame to be decoded, and examining in the fourth stage whether the part of the current frame that corresponds to said second part contains errors.