Selecting a Packet Loss Concealment Procedure
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorStefan Bruhn
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Abstract
In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for selecting a packet loss concealment procedure for a lost audio frame of a received audio signal. A method for selecting a packet loss concealment procedure comprises detecting an audio type of a received audio frame and determining a packet loss concealment procedure based on the audio type. In the method, detecting an audio type comprises determining a stability of a spectral envelope of signals of received audio frames.
Claims18
A method for selecting a packet loss concealment procedure, the method comprising:
- classifying a received audio frame as speech or music by determining a stability of a spectral envelope of signals of received audio frames;
- and
- determining a packet loss concealment procedure based at least partially on the speech/music classification.
An apparatus for selecting a packet loss concealment procedure, the apparatus comprising:
- a processor;
- and
- a memory storing instructions that, when executed by the processor, cause the apparatus to:
- classify a received audio frame as speech or music by determining a stability of a spectral envelope of signals of received audio frames;
- and
- determine a packet loss concealment procedure based at least partially on the speech/music classification.
A non-transitory computer readable-medium storing a computer program comprising program instructions that, when executed by processing circuitry of an apparatus, configures the apparatus to select a packet loss concealment procedure, said program instructions including instructions configuring the apparatus to:
- classify a received audio frame as speech or music by determining a stability of a spectral envelope of signals of received audio frames;
- and
- determine a packet loss concealment procedure based at least partially on the speech/music classification.
A method performed by an apparatus, the method comprising:
- receiving audio frames in a stream of audio frames conveying an encoded audio signal;
- dynamically classifying the encoded audio signal as being speech or music, based on evaluating a stability of a spectral envelope of the encoded audio signal;
- and
- employing, for a lost or corrupted audio frame in the stream of audio frames, a packet loss concealment procedure that is either tailored for speech or tailored for music, in dependence on whether the encoded audio signal currently is classified as being speech or music, according to the dynamic classification.
Dependencies are inferred from the claim text.