Burst frame error handling
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorStefan Bruhn
Life of this patent
Estimating the term…
Abstract
There is provided mechanisms for frame loss concealment. A method is performed by a receiving entity. The method comprises adding, in association with constructing a substitution frame for a lost frame, a noise component to the substitution frame. The noise component has a frequency characteristic corresponding to a low-resolution spectral representation of a signal in a previously received frame.
Claims26
A method, comprising:
- detecting a frame loss in an audio signal, and in response to detecting the frame loss:
- generating a substitution frame for a lost frame based on a spectrum of the audio signal in a previously received frame;
- determining that a burst error length n equals or exceeds a first nonzero threshold;
- and
- adding, in association with constructing the substitution frame for the lost frame and in response to determining that the burst error length equals or exceeds the first nonzero threshold, a noise component to the substitution frame,
- wherein the noise component has a frequency characteristic corresponding to a low-resolution spectral representation of the audio signal in the previously received frame, and
- wherein the noise component comprises a scaled random-phase coefficient.
A receiving entity for frame loss concealment, the receiving entity comprising processing circuitry, the processing circuitry being configured to cause the receiving entity to perform a set of operations comprising:
- detecting a frame loss in an audio signal, and in response to detecting the frame loss:
- generating a substitution frame for a lost frame based on a spectrum of the audio signal in a previously received frame;
- determining that a burst error length n equals or exceeds a first nonzero threshold;
- and
- adding, in association with constructing the substitution frame for the lost frame and in response to determining that the burst error length equals or exceeds the first nonzero threshold, a noise component to the substitution frame,
- wherein the noise component has a frequency characteristic corresponding to a low-resolution spectral representation of the audio signal in the previously received frame, and
- wherein the noise component comprises a scaled random-phase coefficient.
A non-transient computer readable medium comprising instructions which when executed by processing circuitry causes the processing circuitry to:
- detect a frame loss in an audio signal, and in response to detecting the frame loss:
- generate a substitution frame for a lost frame based on a spectrum of the audio signal in a previously received frame;
- determine that a burst error length n equals or exceeds a first nonzero threshold;
- and
- add, in association with constructing the substitution frame for the lost frame and in response to determining that the burst error length equals or exceeds the first nonzero threshold, a noise component to the substitution frame,
- wherein the noise component has a frequency characteristic corresponding to a low-resolution spectral representation of the audio signal in the previously received frame, and
- wherein the noise component comprises a scaled random-phase coefficient.
Dependencies are inferred from the claim text.