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US 10,854,212 B2Granted
Inter-channel phase difference parameter modification
AssigneeQUALCOMM Incorporated
InventorsVenkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam
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Abstract
A method includes performing modifying, at a decoder, at least a portion of inter-channel phase difference (IPD) parameter values based on a mismatch value to generate modified IPD parameter values. The mismatch value is indicative of an amount of temporal misalignment between an encoder-side reference channel and an encoder-side target channel. The modified IPD parameter values are applied to a decoded frequency-domain mid channel during an up-mix operation.
Claims20
A device comprising:
- a receiver configured to receive an encoded bitstream that includes an encoded mid channel and stereo parameters, the stereo parameters including inter-channel phase difference (IPD) parameter values and a mismatch value indicative of an amount of temporal misalignment between an encoder-side reference channel and an encoder-side target channel;
- a stereo parameter adjustment unit configured to modify at least a portion of the IPD parameter values based on the mismatch value to generate modified IPD parameter values;
- and
- an up-mixer configured to perform an up-mix operation on a decoded frequency-domain mid channel to generate a frequency-domain left channel and a frequency-domain right channel, the modified IPD parameter values applied to the decoded frequency-domain mid channel during the up-mix operation, and the decoded frequency-domain mid channel corresponding to a decoded version of the encoded mid channel.
1 more element
A method of decoding audio channels, the method comprising:
- receiving, at a decoder, an encoded bitstream that includes an encoded mid channel and stereo parameters, the stereo parameters including inter-channel phase difference (IPD) parameter values and a mismatch value indicative of an amount of temporal misalignment between an encoder-side reference channel and an encoder-side target channel;
- modifying at least a portion of the IPD parameter values based on the mismatch value to generate modified IPD parameter values;
- and
- performing an up-mix operation on a decoded frequency-domain mid channel to generate a frequency-domain left channel and a frequency-domain right channel, the modified IPD parameter values applied to the decoded frequency-domain mid channel during the up-mix operation, and the decoded frequency-domain mid channel corresponding to a decoded version of the encoded mid channel.
1 more element
An apparatus comprising:
- means for receiving an encoded bitstream that includes an encoded mid channel and stereo parameters, the stereo parameters including inter-channel phase difference (IPD) parameter values and a mismatch value indicative of an amount of temporal misalignment between an encoder-side reference channel and an encoder-side target channel;
- means for modifying at least a portion of the IPD parameter values based on the mismatch value to generate modified IPD parameter values;
- and
- means for performing an up-mix operation on a decoded frequency-domain mid channel to generate a frequency-domain left channel and a frequency-domain right channel, the modified IPD parameter values applied to the decoded frequency-domain mid channel during the up-mix operation, and the decoded frequency-domain mid channel corresponding to a decoded version of the encoded mid channel.
1 more element
Dependencies are inferred from the claim text.