Low complexity dense transient events detection and coding
AssigneeDolby International AB
InventorsArijit Biswas, Michael Schug, Harald Mundt
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Abstract
The present disclosure relates to methods and apparatus for audio coding. A method of encoding a portion of an audio signal comprises determining whether the portion of the audio signal is likely to contain dense transient events, and if it is determined that the portion of the audio signal is likely to contain dense transient events, quantizing the portion of the audio signal using a quantization 5 mode that applies a substantially constant signal-to-noise ratio over frequency for the portion of the audio signal. The present disclosure further relates to a method of detecting dense transient events in a portion of an audio signal.
Claims21
A method of encoding a portion of an audio signal, the method comprising:
- determining whether the portion of the audio signal is likely to contain dense transient events;
- and
- if it is determined that the portion of the audio signal is likely to contain dense transient events, quantizing the portion of the audio signal using a quantization mode that applies a constant signal-to-noise ratio over frequency for the portion of the audio signal.
A method of encoding a portion of an audio signal, the method comprising:
- obtaining a value of a first feature relating to a perceptual entropy of the portion of the audio signal;
- selecting a quantization mode for quantizing the portion of the audio signal based on the value of the first feature;
- and
- quantizing the portion of the audio signal using the selected quantization mode,
- wherein selecting the quantization mode involves determining, based at least in part on the value of the first feature, whether a quantization mode that applies a constant signal-to-noise ratio over frequency shall be used for the portion of the audio signal.
A method of detecting dense transient events in a portion of an audio signal, the method comprising:
- obtaining a value of a first feature relating to a perceptual entropy of the portion of the audio signal;
- and
- determining whether the portion of the audio signal is likely to contain dense transient events based at least in part on the value of the first feature.
Dependencies are inferred from the claim text.