AUDIO DECODER AND METHOD FOR PROVIDING A DECODED AUDIO INFORMATION USING AN ERROR CONCEALMENT MODIFYING A TIME DOMAIN EXCITATION SIGNAL

摘要

An audio decoder for providing a decoded audio information on the basis of an encoded audio information. The audio decoder has an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame, wherein the error concealment is configured to modify a time domain excitation signal obtained for one or more audio frames preceding a lost audio frame, in order to obtain the error concealment audio information.

主权项

1. An audio decoder for providing a decoded audio information on the basis of an encoded audio information, the audio decoder comprising:
an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame, wherein the error concealment is configured to modify a time domain excitation signal acquired for one or more audio frames preceding a lost audio frame, in order to acquire the error concealment audio information; wherein the error concealment is configured to acquire an information about an intensity of a deterministic signal component in one or more audio frames preceding a lost audio frame, and wherein the error concealment is configured to compare the information about an intensity of a deterministic signal component in one or more audio frames preceding a lost audio frame with a threshold value, to decide whether to input a deterministic time domain excitation signal with the addition of a noise like time domain excitation signal into an LPC synthesis, or whether to input only a noise time domain excitation signal into the LPC synthesis.