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US 10,757,521 B2Granted
Parametric audio decoding
AssigneeQUALCOMM Incorporated
InventorsVenkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
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Abstract
A stereo parameter conditioner performs a conditioning operation on a first value of a stereo parameter and a second value of the stereo parameter to generate a conditioned value of the stereo parameter. The first value is associated with a first frequency range, and the second value is associated with a second frequency range. The conditioned value is associated with a particular frequency range that is a subset of the first frequency range or a subset of the second frequency range.
Claims30
An apparatus comprising:
- a receiver configured to receive a bitstream that includes an encoded mid signal and encoded stereo parameter information, the encoded stereo parameter information representing a first value of a stereo parameter and a second value of the stereo parameter, wherein the first value is associated with a first frequency range, and wherein the second value is associated with a second frequency range that is distinct from the first frequency range;
- a stereo decoder configured to decode the encoded stereo parameter information to determine the first value and the second value;
- a stereo parameter conditioning circuit configured to perform a conditioning operation on the first value and the second value to generate a conditioned value of the stereo parameter, the conditioned value associated with a particular frequency range;
- and
- an up-mixer configured to perform an up-mix operation on a frequency-domain decoded mid signal generated from the encoded mid signal, the conditioned value applied to the frequency-domain decoded mid signal during the up-mix operation.
2 more elements
A method comprising:
- receiving, at a decoder, a bitstream that includes an encoded mid signal and encoded stereo parameter information, the encoded stereo parameter information representing a first value of a stereo parameter and a second value of the stereo parameter;
- decoding the encoded stereo parameter information to determine the first value and the second value;
- performing a conditioning operation on the first value and the second value to generate a conditioned value of the stereo parameter, wherein the first value is associated with a first frequency range, and wherein the second value is associated with a second frequency range that is distinct from the first frequency range;
- and
- performing an up-mix operation on a frequency-domain decoded mid signal generated from the encoded mid signal, the conditioned value applied to the frequency-domain decoded mid signal during the up-mix operation.
2 more elements
A non-transitory computer-readable medium comprising instructions that, when executed by a processor within a decoder, causes the processor to perform operations including:
- receiving a bitstream that includes an encoded mid signal and encoded stereo parameter information, the encoded stereo parameter information representing a first value of a stereo parameter and a second value of the stereo parameter;
- decoding the encoded stereo parameter information to determine the first value and the second value;
- performing a conditioning operation on the first value and the second value to generate a conditioned value of the stereo parameter, wherein the first value is associated with a first frequency range, and wherein the second value is associated with a second frequency range that is distinct from the first frequency range;
- and
- performing an up-mix operation on a frequency-domain decoded mid signal generated from the encoded mid signal, the conditioned value applied to the frequency-domain decoded mid signal during the up-mix operation.
2 more elements
An apparatus comprising:
- means for receiving a bitstream that includes an encoded mid signal and encoded stereo parameter information, the encoded stereo parameter information representing a first value of a stereo parameter and a second value of the stereo parameter;
- means for decoding the encoded stereo parameter information to determine the first value and the second value;
- means for performing a conditioning operation on the first value and the second value to generate a conditioned value of the stereo parameter, wherein the first value is associated with a first frequency range, and wherein the second value is associated with a second frequency range that is distinct from the first frequency range;
- and
- means for performing an up-mix operation on a frequency-domain decoded mid signal generated from the encoded mid signal, the conditioned value applied to the frequency-domain decoded mid signal during the up-mix operation.
2 more elements
Dependencies are inferred from the claim text.