9results about "Tone control" patented technology

The audio device includes a receiver 101 configured to receive an audio signal from which an audio beamformer 103 generates a beamformed output audio signal. The beamformer 103 includes a signal processor 201 that applies signal processing to the audio signal. Signal processing includes spatial beamforming and spatial decorrelation, which is often adapted spatial decorrelation. A decorrelation adapter 203 adapts decorrelation parameters depending on the audio signal, and a beamform adapter 205 adapts beamform parameters depending on the beamformed output audio signal. An equalizer 105 applies frequency equalization to the beamformed output audio signal to generate an output signal, and an equalization adapter 107 adapts frequency equalization depending on the beamform parameters, typically also depending on the decorrelation parameters. This approach provides improved fidelity to the desired sound source and attenuates interfering sound sources.

The invention relates to an audio effect selection device (210) for processing an audio signal, comprising: - a memory (212) arranged to store datasets, each associated with a respective audio ambience, each dataset comprising a vector of reference values, each corresponding to a respective audio component, a vector of weighting coefficients, each corresponding to a respective audio component, and audio effects; and - a calculator (214) arranged to receive a vector of values ​​associated with an audio file, each value corresponding to a respective audio component, to calculate a respective distance between said audio file and each audio ambience, and to select, as audio effects to be applied to an audio signal from said audio file, the audio effects from the dataset associated with the audio ambience for which the distance is the smallest. [Fig. 2]

A system filters an audio signal includes a signal input, a signal output, a scaling path, a limiter path, and a delay path. The signal input receives an input signal and the signal output for outputs an output signal. The limiter path is parallel to the scaling path. The delay path is between the signal input and the signal output parallel to the scaling path and the limiter path. The scaling path forms a scaling signal by forming a mean value of the input signal and using non-linear signal processing. The limiter path includes a low-pass characteristic and changes a phase of the input signal of the system in a manner dependent on frequency in order to generate a limiter signal. The system impresses the limiter signal that is scaled using the scaling signal onto a delay signal of the delay path in order to generate the output signal.

To provide an equalizer circuit and a related power management circuit capable of reducing distortion in an envelope tracking (ET) voltage in a case where a radio frequency (RF) signal is modulated in a wide modulation band width.SOLUTION: In a power management device 30, a power management circuit 28 has: a power amplifier circuit 34 configured to generate an ET voltage VCC on the basis of a differential target voltage and provide the ET voltage VCC to a power amplifier circuit 32 via a signal path 36 for amplifying an RF signal 38; and an equalizer circuit 40 that equalizes the differential target voltage prior to generating the ET voltage VCC. Specifically, the equalizer circuit 40 is configured to provide a transfer function including a second-order complex-zero term and a real-zero term for offsetting a transfer function of an inherent trace inductance of the signal path and an inherent impedance of a voltage amplifier circuit.SELECTED DRAWING: Figure 4

A method for equalizing an audio frequency signal broadcast in a broadcasting environment. Such a method includes: estimating a frequency profile of a noise signal representing a background noise present in the broadcasting environment, based on, on the one hand, a signal captured by at least one microphone implemented in the broadcasting environment and, on the other hand, the audio frequency signal; determining a desired frequency profile for the broadcast audio frequency signal; determining an acoustic frequency mask representing, for each frequency component, a difference between the frequency profile of the noise signal and the desired frequency profile; and equalizing the audio frequency signal via a weighting of a spectrum of the audio frequency signal by applying a frequency weighting mask that is a function of the acoustic frequency mask, delivering the equalized audio frequency signal.

A circuit includes a Sallen-Key filter and a programmable gain amplifier coupled to the Sallen-Key filter, the Sallen-Key filter including a source follower implementing a unity gain amplifier. The circuit is capable of implementing a programmable gain that decouples the bandwidth of the circuit from its gain setting via adjustment of a current mirror replication ratio in the programmable gain amplifier. The programmable gain amplifier can include a differential voltage-to-current converter, a current mirror pair, and a programmable output gain stage. At least one leg in the Sallen-Key filter and the programmable gain amplifier can include transistors arranged in the same circuit configuration.