Audio Decoder And Method To Provide Decoded Audio Information Using An Error Concealment That Modifies A Time Domain Excitation Signal

Abstract

An audio decoder (200; 400) for providing decoded audio information (220; 412) based on encoded audio information (210; 410), the audio decoder comprising: an error concealment (240; 480; 600 ) configured to provide error concealment audio information (242; 482; 612) for concealing a loss of an audio frame, wherein the error concealment is configured to modify a time domain drive signal (452, 456; 610) obtained for one or more audio frames preceding a lost audio frame, to obtain the error concealment audio information; the audio decoder is characterized in that the error concealment (240; 480; 600) is configured to obtain information about an intensity of a deterministic signal component in one or more audio frames preceding a lost audio frame, and wherein error concealment is configured to compare 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 introduce a signal ( 652) of deterministic time-domain excitation with the addition of a noise-like time-domain excitation signal (662) in an LPC synthesis (680), or whether to introduce just a single-domain excitation signal (662) of noise time in LPC synthesis.

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4G,3G	06/03/2016	ISLD-201512-009	FRAUNHOFER SOCIETY	S1 TS Number: TS 126 445 Version No: Illustrative part: ---- Release: + -				No	Family Member

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