Method and apparatus for controlling audio frame loss concealment

摘要

Methods and related apparatuses control concealment for a lost audio frame of a received audio signal. A method for a decoder of concealing a lost audio frame includes detecting in a property of the previously received and reconstructed audio signal, or in a statistical property of observed frame losses, a condition for which the substitution of a lost frame provides relatively reduced quality. In case such a condition is detected, the concealment method is modified by selectively adjusting a phase or a spectrum magnitude of a substitution frame spectrum.

主权项

1. A method by a computer processor for controlling a concealment method for a lost audio frame of a received audio signal, the method comprising:
detecting in a property of a previously received and reconstructed audio signal a transient condition that could lead to suboptimal reconstruction quality, when an original concealment method is used to create a substitution frame; and modifying the original concealment method by selectively adjusting a spectrum magnitude of a substitution frame spectrum, when the transient condition is detected; further detecting in a statistical property of observed frame losses a second condition that could lead to suboptimal reconstruction quality, when the original concealment method is used to create the substitution frame; further modifying the original concealment method by selectively adjusting the spectrum magnitude of the substitution frame spectrum, when the second condition is detected; generating another reconstructed audio signal using the modified and further modified original concealment method; and playing the another reconstructed audio signal through a loudspeaker.