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.
Claims11
A method of operation by a host device, the method comprising:
- receiving audio frames in a stream of consecutive audio frames;
- detecting a frame loss in the stream;
- determining a packet loss concealment procedure to use for concealing the frame loss, in dependence on a spectral envelope stability of the stream;
- and
- determining the spectral envelope stability of the stream as a numeric measure of inter-frame variability that is calculated in dependence on the spectral envelopes of two or more audio frames in the stream that were correctly received in advance of the frame loss.
An electronic apparatus comprising:
- communication circuitry configured to receive audio frames in a stream of consecutive audio frames;
- and
- processing circuitry configured to:
- detect a frame loss in the stream;
- determine a packet loss concealment procedure to use for concealing the frame loss, in dependence on a spectral envelope stability of the stream;
- and
- determine the spectral envelope stability of the stream as a numeric measure of inter-frame variability that is calculated in dependence on the spectral envelopes of two or more audio frames in the stream that were correctly received in advance of the frame loss.
Dependencies are inferred from the claim text.