AUDIO FRAME LOSS CONCEALMENT

A method and an apparatus for an audio frame loss concealment. According to the method a segment of a previous audio signal is used as a prototype frame in order to create a substitution frame for a lost audio frame. The prototype frame is transformed into a frequency domain where a sinusoidal model...

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Bibliographische Detailangaben
1. Verfasser:	BRUHN, Stefan
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS MUSICAL INSTRUMENTS PHYSICS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION
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Beschreibung
Zusammenfassung:	A method and an apparatus for an audio frame loss concealment. According to the method a segment of a previous audio signal is used as a prototype frame in order to create a substitution frame for a lost audio frame. The prototype frame is transformed into a frequency domain where a sinusoidal model is applied to the prototype frame to identify the frequency of a sinusoidal component of the audio signal. The sinusoidal component is phase shifted and the substitution frame is created by performing an inverse frequency transform of a frequency spectrum of the prototype frame.