Method and device for voice activity detection
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorMartin Sehlstedt
Life of this patent
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Abstract
In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus for voice activity detection (VAD). The VAD comprises creating a signal indicative of a primary VAD decision and determining hangover addition. The determination on hangover addition is made in dependence of a short term activity measure and/or a long term activity measure. A signal indicative of a final VAD decision is then created.
Claims21
A method for hangover addition for discontinuous transmission (DTX) in speech or audio coding, the method comprising:
- determining a primary decision based on signal activity;
- determining a final decision based on whether a hangover addition of the primary decision is performed;
- determining a short term activity measure based on past primary decisions;
- determining a long tem′ activity measure based on past final decisions or past primary decisions;
- and
- adjusting the hangover addition based on the short term activity measure and the long term activity measure, wherein a first number of hangover frames is added if the short term activity measure exceeds a first threshold and a second number of hangover frames is added if the long term activity measure exceeds a second threshold.
An apparatus for hangover addition for discontinuous transmission (DTX) in speech or audio coding, comprising:
- a processor;
- a memory coupled to the processor and storing instructions;
- and
- wherein the processor is operable to execute the instructions to:
- determine a primary decision based on signal activity;
- determine a final decision based on whether a hangover addition of the primary decision is performed;
- determine a short term activity measure based on past primary decisions;
- determine a long term activity measure based on past final decisions or past primary decisions;
- and
- adjust the hangover addition based on the short teiiu activity measure and the long term activity measure, wherein the processor is operable to add a first number of hangover frames if the short term activity measure exceeds a first threshold and to add a second number of hangover frames if the long term activity measure exceeds a second threshold.
A computer program product comprising a non-transitory computer-readable storage medium, the non-transitory computer readable storage medium having a computer program comprising computer-executable instructions which, when executed on a processor, are configured to perform a method for hangover addition for discontinuous transmission (DTX) in speech or audio coding, the method comprising:
- determining a primary decision based on signal activity;
- determining a final decision based on whether a hangover addition of the primary decision is performed;
- determining a short term activity measure based on past primary decisions;
- determining a long term activity measure based on past final decisions or past primary decisions;
- and
- adjusting the hangover addition based on the short term activity measure and the long term activity measure, wherein a first number of hangover frames is added if the short term activity measure exceeds a first threshold and a second number of hangover frames is added if the long term activity measure exceeds a second threshold.
Dependencies are inferred from the claim text.