Techniques for Comfort Noise Generation in a Communication System
First Claim
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1. A method of operating a communication device, comprising:
- determining respective individual level estimates for respective sub-bands included in a frequency band associated with a background noise signal;
determining a total level estimate for the background noise signal; and
providing a comfort noise signal whose characteristics are based on the respective individual level estimates and the total level estimate.
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Abstract
A technique of operating a communication device includes dividing a frequency band associated with a background noise signal into respective sub-bands. Respective individual level estimates for each of the respective sub-bands are then determined. A total level estimate for the background noise signal is determined. Finally, a comfort noise signal (whose characteristics are based on the respective individual level estimates and the total level estimate) is provided.
38 Citations
20 Claims
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1. A method of operating a communication device, comprising:
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determining respective individual level estimates for respective sub-bands included in a frequency band associated with a background noise signal; determining a total level estimate for the background noise signal; and providing a comfort noise signal whose characteristics are based on the respective individual level estimates and the total level estimate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A communication device, comprising:
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an analysis task block configured to; divide a frequency band associated with a background noise signal into respective sub-bands; determine respective individual level estimates for each of the respective sub-bands; and determine a total level estimate for the background noise signal; and a synthesis task block in communication with the analysis task block, wherein the synthesis task block is configured to provide a comfort noise signal whose characteristics are based on the respective individual level estimates and the total level estimate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of operating a communication device, comprising:
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filtering a background noise signal to derive sub-band level estimates for respective sub-bands included in a frequency band associated with the background noise signal; integrating the respective sub-band level estimates to derive respective individual level estimates; integrating the background noise signal to derive a total level estimate; and providing a comfort noise signal whose characteristics are based on the respective individual level estimates and the total level estimate. - View Dependent Claims (20)
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Specification