Texas Instruments Corporation

Nxp B.v.

Laurent Le Faucheur

Eric Louis Pierre Badi

Paul Correia

Fabien Ober

Thierry Le Gall

Francois Goeusse

Paul Folacci

Ludovick Dominique Joel Lepauloux

Nicolas Veau

Xavier Lefevre

The disclosure relates to an audio classifier comprising: a first processor having hard-wired logic configured to receive an audio signal and detect audio activity from the audio signal; and a second processor having reconfigurable logic configured to classify the audio signal as a type of audio signal in response to the first processor detecting audio activity.

Audio classifier that includes analog signal voice activity detection and digital signal voice activity detection

A noise-cancelling system includes headset for generating a feedback signal for noise-cancellation in response to sound externally generated from the headset. An encoded microphone signal is generated in response to the first feedback signal. An audio generator can be used to generate a noise-cancellation signal in response to the encoded microphone signal and to generate an electronic audio signal in response to the encoded microphone signal and a first output audio signal. An audio connector is provided to couple the encoded microphone signal from the headset to the audio generator and to couple the first electronic audio signal to the headset.

Active noise-cancellation feedback signal transmission

A noise-cancelling system includes headset for generating a feedback signal for noise-cancellation in response to sound externally generated from the headset. The noise-cancellation feedback signal can also be described as a noise-cancellation 'feed-forward' signal. An encoded microphone signal is generated in response to the first feedback signal. An audio generator can be used to generate a noise-cancellation signal in response to the encoded microphone signal and to generate an electronic audio signal in response to the encoded microphone signal and a first output audio signal. An audio connector is provided to couple the encoded microphone signal from the headset to the audio generator and to couple the first electronic audio signal to the headset.

Feedback microphones encoder modulators, signal generators, mixers, amplifiers, summing nodes

In at least some embodiments, an electronic device includes a data sink and a buffer coupled to the data sink. The buffer is configured to receive streaming data in transit to the data sink. The electronic device also includes a clock drift compensation controller coupled to the buffer, wherein the clock drift compensation controller is configured to apply either of two predetermined clock drift compensation values to a clock rate for the buffer whenever a buffer fullness status value is offset from a predetermined threshold.

Clock drift compensation interpolator adjusting buffer read and write clocks

A system and method for controlling a sound level of a mobile audio device are disclosed herein. In accordance with at least some embodiments, a system includes a transducer, a phase estimator, and a sound level control. The transducer converts an electrical signal applied to the transducer into audible sound. The phase estimator estimates a phase difference between a voltage and a current of the electrical signal applied to the transducer. The sound level control controls the loudness of sound produced by the transducer based, at least in part on the estimated phase difference.

Sound level control in responding to the estimated impedances indicating that the medium being an auditory canal and other than the auditory canal

Instantiating a plurality of buffers in a random access memory by storing in the random access memory (RAM) a plurality of descriptors each containing a base address, at least one address pointer and a size to define a corresponding one of the plurality of buffers. Transferring data in any one of the plurality of buffers by using a control function within an accessing module to generate a buffer address by accessing and updating the address pointer in the corresponding descriptor. In a processor that accesses the circular buffers, the control function is one or more complex instructions tailored for computing read and write addresses to access the circular buffer using fields within the corresponding descriptor. In a DMA module that accesses the circular buffers, the control function is a hardware controller that computes read and write addresses using the fields within the corresponding descriptor to access the circular buffer.

Control function for memory based buffers

A system comprising converter logic that introduces noise to a signal. The system also comprises amplifier logic that reduces a sound pressure associated with the noise by amplifying the signal prior to providing the signal to the converter logic and de-amplifying the signal after providing the signal to the converter logic.

Reducing sound pressure of noise

A system comprising audio logic adapted to convert captured sound into an audio signal. The system also comprises transmission logic which causes noise to be added to the audio signal. The system further comprises processing logic adapted to at least partially remove the noise from the audio signal by subtracting a noise waveform from the audio signal to produce a result signal. The processing logic generates the noise waveform using power level information associated with the transmission logic. The transmission logic transmits the result signal to another electronic device.

Uplink noise cancellation

In at least some disclosed embodiments, a wireless electronic system includes a decoder module coupled to a processor. The decoder module is configured to send a signal to the processor based on a less than completely acquired burst of data. The less than completely acquired burst of data is part of a complete burst of data, and the complete burst of data is contiguous. The processor causes a reduction in power consumption of the wireless electronic system based on the signal.

Limiting the power consumption of a wireless electronic system

A system comprising a first communication device and a second communication device adapted to determine a property of communications between the first and second communication devices. The second communication device estimates a power level associated with the first communication device for a length of time determined according to the property.

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Antibes, France

Laurent Le Faucheur