REDUCING CODEC NOISE IN ACOUSTIC DEVICES
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Accused Products
Abstract
The technology described in this document can be embodied in a computer-implemented method that includes receiving, at a first acoustic device, a representation of an audio signal, and amplifying the representation of the audio signal by a first gain factor to generate an amplified input signal. The method also includes processing the amplified input signal by an audio codec that includes one or more processors to generate a processed signal that represents a portion of the audio signal to be output by a second acoustic device. The processed signal includes noise originating at the audio codec. The method further includes transmitting the processed signal to the second acoustic device.
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Citations
44 Claims
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1-25. -25. (canceled)
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26. A computer-implemented method comprising:
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receiving, at a first acoustic device, a representation of an audio signal; detecting a dynamic range of the representation of the audio signal; determining available dynamic range headroom as a difference between a dynamic range of a system in which the audio codec is disposed, and the dynamic range of the representation of the audio signal; selecting a first gain factor such that an associated amount of amplification does not exceed the available dynamic range headroom; amplifying the representation of the audio signal by the first gain factor to generate an amplified input signal; processing the amplified input signal by an audio codec comprising one or more processors to generate a processed signal that represents a portion of the audio signal to be output by a second acoustic device; transmitting the processed signal to the second acoustic device; - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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35. A system comprising:
a first acoustic device configured to receive a representation of an audio signal, the first acoustic device comprising; an amplifier configured to amplify the representation of the audio signal by a first gain factor to generate an amplified input signal, wherein a determination of the first gain factor comprises; detecting a dynamic range of the received representation of the audio signal, determining available dynamic range headroom as a difference between a dynamic range of the system and the dynamic range of the received representation of the audio signal, and selecting the first gain factor such that an associated amount of amplification does not exceed the available dynamic range headroom; an audio codec comprising one or more processors, the audio codec configured to process the amplified input signal to generate a processed signal that represents a portion of the audio signal to be output by a second acoustic device; and a transmitter for transmitting the processed signal to the second acoustic device. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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44. A machine-readable storage device having encoded thereon computer readable instructions for causing one or more processors to perform operations comprising:
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receiving, at a first acoustic device, a representation of an audio signal; detecting a dynamic range of the representation of the audio signal; determining available dynamic range headroom as a difference between a dynamic range of a system in which the audio codec is disposed, and the dynamic range of the representation of the audio signal; selecting a first gain factor such that an associated amount of amplification does not exceed the available dynamic range headroom; amplifying the representation of the audio signal by the first gain factor to generate an amplified input signal; processing the amplified input signal to generate a processed signal that represents a portion of the audio signal to be output by a second acoustic device; and providing the processed signal for transmission to the acoustic device.
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Specification