Encoding and decoding of interchannel phase differences between audio signals
AssigneeQUALCOMM Incorporated
InventorsVenkata Subrahmanyam Chandra Sekhar CHEBIYYAM, Venkatraman ATTI
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Abstract
A device for processing audio signals includes an interchannel temporal mismatch analyzer, an interchannel phase difference (IPD) mode selector and an IPD estimator. The interchannel temporal mismatch analyzer is configured to determine an interchannel temporal mismatch value indicative of a temporal misalignment between a first audio signal and a second audio signal. The IPD mode selector is configured to select an IPD mode based on at least the interchannel temporal mismatch value. The IPD estimator is configured to determine IPD values based on the first audio signal and the second audio signal. The IPD values have a resolution corresponding to the selected IPD mode.
Claims31
A device for processing audio signals comprising:
- an interchannel temporal mismatch analyzer configured to determine an interchannel temporal mismatch value indicative of a temporal misalignment between a first audio signal and a second audio signal;
- an interchannel phase difference (IPD) mode selector configured to select an IPD mode based on at least the interchannel temporal mismatch value;
- and
- an IPD estimator configured to determine IPD values based on the first audio signal and the second audio signal, the IPD values having a resolution corresponding to the selected IPD mode.
A device for processing audio signals comprising:
- an interchannel phase difference (IPD) mode analyzer configured to determine an IPD mode;
- and
- an IPD analyzer configured to extract IPD values from a stereo-cues bitstream based on a resolution associated with the IPD mode, the stereo-cues bitstream associated with a mid-band bitstream corresponding to a first audio signal and a second audio signal.
A method of processing audio signals comprising:
- determining, at a device, an interchannel temporal mismatch value indicative of a temporal misalignment between a first audio signal and a second audio signal;
- selecting, at the device, an interchannel phase difference (IPD) mode based on at least the interchannel temporal mismatch value;
- and
- determining, at the device, IPD values based on the first audio signal and the second audio signal, the IPD values having a resolution corresponding to the selected IPD mode.
An apparatus for processing audio signals comprising:
- means for determining an interchannel temporal mismatch value indicative of a temporal misalignment between a first audio signal and a second audio signal;
- means for selecting an interchannel phase difference (IPD) mode based on at least the interchannel temporal mismatch value;
- and
- means for determining IPD values based on the first audio signal and the second audio signal, the IPD values, the IPD values having a resolution corresponding to the selected IPD mode.
A computer-readable storage device storing instructions that, when executed by a processor, cause the processor to perform operations comprising:
- determining an interchannel temporal mismatch value indicative of a temporal misalignment between a first audio signal and a second audio signal;
- selecting an interchannel phase difference (IPD) mode based on at least the interchannel temporal mismatch value;
- and
- determining IPD values based on the first audio signal or the second audio signal, the IPD values having a resolution corresponding to the selected IPD mode.
Dependencies are inferred from the claim text.