Patent ID: 9020812
Filing Date: 2015-04-28
Classification: G10L

Abstract:
1. A method for processing an audio signal by an audio signal processing device, comprising: receiving, with the audio signal processing device, a pitch gain of a previous frame, a pitch delay of the previous frame and an arbitrary codebook gain of the previous frame from the audio signal; checking, with the audio signal processing device, whether a current frame has an error based on a bad frame indicator; generating, with the audio signal processing device, a pitch gain of a current frame and a pitch delay of the current frame using the pitch gain of the previous frame and the pitch delay of the previous frame when the current frame has an error; generating, with the audio signal processing device, an adaptive codebook using the pitch gain of the current frame and the pitch delay of the current frame; generating, with the audio signal processing device, an arbitrary fixed codebook gain of the current frame using a fixed codebook gain of the previous frame; and generating, with the audio signal processing device, an error-concealed excitation signal using the pitch gain of the current frame, the adaptive codebook of the current frame, and the arbitrary fixed codebook gain of the current frame.