14results about "Digital/coded signal control" patented technology

A method of amplifying a signal is provided. The method includes: applying an analog gain to a signal, wherein an analog gain amount is applied with an offset lower than a set gain amount; applying a digital gain to the signal, wherein the amount of the applied digital gain is up to the offset; and converting the signal between digital and analog between the steps of applying the gain. The digital gain amount is adjustable based on the amplitude of the signal. The amplifier is further provided with an analog gain module, a digital gain module and a converter connected between the modules.

The invention relates to an acoustic signal amplifier adapted for connection to a loudspeaker and for communication with a digital computer via at least one first data bus. The amplifier is characterized in that it comprises: a sampling register including several current samples captured at a sampling frequency; a first threshold volume register associated with a first threshold value; a first comparator adapted for comparing current samples from the sampling register to the first threshold value of the first volume register; a first time counter adapted for being triggered when a compared current sample is greater than the first threshold value and adapted for being reset when another compared current sample is less than the first threshold value; and an alert unit.adapted to send an alert on the first data bus to the digital computer when the first time counter reaches a first threshold time value. Figure 2a,

Methods and systems for modification of electronic system operation based on acoustic ambience classification are presented. In an example method, at least one audio signal present in a physical environment of a user is detected. The at least one audio signal is analyzed to extract at least one audio feature from the audio signal. The audio signal is classified based on the audio feature to produce at least one classification of the audio signal. Operation of an electronic system interacting with the user in the physical environment is modified based on the classification of the audio signal.

A method and system for processing an input audio mix, by extracting at least two source audio signals, each audio source signal representing a separate audio source, extracting audio mix information from the input audio mix, the audio mix information including at least one of audio mix semantic properties and audio mix signal properties, determining audio processing parameters based on the audio mix information, and processing the source audio signals based on the audio processing parameters to generate a processed audio mix. The processing of the sources can thus be based on properties of the input audio mix before source separation, thereby allowing a more automated source processing.

A method for use in an audio system including a plurality of amplifier channels of a corresponding audio channel. Each of the amplifier channels receives a respective input audio signal and is powered by the same power supply. The method includes obtaining (810) a value of an indicator, the indicator representing an energy reserve of the power supply, and for each of the amplifier channels, determining (830) a gain to be applied to the respective input audio signal by an attenuation function and a clipping level to be applied to the output of the attenuation function by a clipping function, wherein when the value of the indicator is below a threshold, the gain decreases over time, when the value of the indicator is above the threshold, the gain increases over time to a maximum value, the threshold represents a nominal energy level at which the power supply is in a nominal operating state, and the clipping level is determined as a monotonic function of the value of the indicator.

A modulator circuit may include an integrator circuit and a gain compensation circuit. The integrator circuit may include a first amplifier including an input to receive a signal and an output to provide an inverted signal and a capacitor including a first terminal coupled to the input and a second terminal coupled to the output. The gain compensation circuit may include a second inverter amplifier including a gain input coupled to the output of the first amplifier and including a gain output; a first resistor including a first terminal coupled to the gain output and including a second terminal; and a second capacitor including a first terminal coupled to the second terminal of the first resistor and including a second terminal coupled to the gain input. The integrator circuit has a finite DC gain and the gain compensation circuit is configured to compensate for the finite DC gain.

Described herein is a method of metadata-based dynamic processing of audio data for playback, the method including: receiving, by a decoder, a bitstream including audio data and metadata for dynamic loudness adjustment; decoding, by the decoder, the audio data and the metadata to obtain decoded audio data and the metadata; determining, by the decoder, from the metadata, one or more processing parameters for dynamic loudness adjustment based on a playback condition; applying the determined one or more processing parameters to the decoded audio data to obtain processed audio data; and outputting the processed audio data for playback. Described is further a method of encoding audio data and metadata for dynamic loudness adjustment into a bitstream. Moreover, described are a respective decoder and encoder, a respective system and computer program products.

A method and system for processing input audio mixing by extracting at least two source audio signals, each audio source signal representing an independent audio source; extracting audio mixing information from the input audio mixing, wherein the audio mixing information comprises at least one of an audio mixing semantic attribute and an audio mixing signal attribute; determining audio processing parameters based on the audio mixing information; and processing the source audio signal based on the audio processing parameters to generate a processed audio mix. Thus, processing of the source may be based on attributes of the input audio mix prior to source separation, thereby enabling more automated source processing.

Amplifier circuit with programmable gain, featuring the following: at least one device pin (208A) designed to be coupled to an external gain adjustment resistor component (RG); a resistor component chain (202) comprising several resistor components (206A-206H); a comparator chain (204) with several comparator circuits (U1-U8), wherein the several comparator circuits (U1-U8) have the following: first inputs, which are coupled in such a way that they receive voltages generated by corresponding components of the multiple resistors; and second inputs that are coupled in such a way that they receive a voltage applied to at least one device pin (208A); a logic circuit (210) with multiple inputs coupled to corresponding outputs of the multiple comparator circuits (U1-U8); and an amplifier component that is adjustable by the logic circuit (210) based on outputs of the multiple comparator circuits (U1-U8), wherein the logic circuit (210) is configured to adjust the gain of the amplifier component based on a comparison between the voltages from the resistor component chain (202) and the voltage applied to the at least one device pin (208A).

The modulator circuit may include an integrator circuit and a gain compensation circuit. The integrator circuit may include a first amplifier including an input for receiving a signal and an output for providing an inverted signal; and a capacitor including a first end coupled to the input and a second end coupled to the output. The gain compensation circuit may include: a second inverter amplifier including a gain input coupled to the output of the first amplifier and including a gain output; a first resistor including a first end coupled to the gain output and including a second end; and a second capacitor including a first end coupled to the second end of the first resistor and including a second end coupled to the gain input. The integrator circuit has a limited DC gain, and the gain compensation circuit is configured to compensate for the limited DC gain.

A modulator circuit may include an integrator circuit and a gain compensation circuit. The integrator circuit may include a first amplifier including an input to receive a signal and an output to provide an inverted signal and a capacitor including a first terminal coupled to the input and a second terminal coupled to the output. The gain compensation circuit may include a second inverter amplifier including a gain input coupled to the output of the first amplifier and including a gain output; a first resistor including a first terminal coupled to the gain output and including a second terminal; and a second capacitor including a first terminal coupled to the second terminal of the first resistor and including a second terminal coupled to the gain input. The integrator circuit has a finite DC gain and the gain compensation circuit is configured to compensate for the finite DC gain.

A method and system for processing an input audio mix. The processing comprises the steps of: extracting at least two source audio signals, each representing a separate audio source; extracting audio mix information from an input audio mix, the audio mix information including at least one of audio mix semantic characteristics and audio mix signal attributes; determining audio processing parameters based on the audio mix information; and processing the source audio signals based on the audio processing parameters to generate a processed audio mix. In this way, source processing can be based on the characteristics of the input audio mix before source separation, thereby enabling more automated source processing.

In one aspect, a network may perform a method including determining one or more among a plurality of slots that an analog gain change of an automatic gain control (AGC) process is permitted, and signaling to a user equipment (UE) that is coupled to or in communication with the network, the one or more of the plurality of slots that the analog gain change is permitted. The network may schedule downlink based on the one or more of the plurality of slots that the analog gain change is permitted.

Methods and systems for modification of electronic system operation based on acoustic ambience classification are presented. In an example method, at least one audio signal present in a physical environment of a user is detected. The at least one audio signal is analyzed to extract at least one audio feature from the audio signal. The audio signal is classified based on the audio feature to produce at least one classification of the audio signal. Operation of an electronic system interacting with the user in the physical environment is modified based on the classification of the audio signal.