Patent ID: 7877253
Filing Date: 2011-01-25
Classification: G10L

Abstract:
1. A method of obtaining frames of a decoded speech signal, said method comprising: based on information from a first encoded frame of an encoded speech signal and a first excitation signal, calculating a first frame of the decoded speech signal; in response to an indication of erasure of a frame of said encoded speech signal that immediately follows said first encoded frame, and based on a second excitation signal, calculating a second frame of said decoded speech signal that immediately follows said first frame; and based on a third excitation signal, calculating a third frame that precedes said first frame of the decoded speech signal, wherein the first excitation signal is based on a product of (A) a first sequence of values that is based on information from the third excitation signal and (B) a first gain factor, and wherein said calculating a second frame includes generating the second excitation signal according to a relation between a threshold value and a value based on the first gain factor, such that the second excitation signal is based on a product of (A) a second sequence of values that is based on information from said first excitation signal and (B) a second gain factor greater than the first gain factor, and wherein at least one of the calculating steps is processed by at least one of processors.