In an embodiment, a circuit includes N sensing channels. Each channel includes a first main sensing node and a second redundancy sensing node paired therewith. N analog-to-digital converters (ADCs) are coupled to the first sensing nodes, with digital processing circuits coupled to the N ADCs. A pair of multiplexers are coupled to the second sensing nodes and to the N ADCs with a further ADC coupled to the output of the second multiplexer. An error checking circuit is coupled to the outputs of the second multiplexer and the further ADC to compare, at each time window in a sequence of N time windows, a first digital value and a second digital value resulting from conversion to digital of: an analog sensing signal at one of the first sensing nodes, and an analog sensing signal at the second sensing node paired with the selected one of the first sensing nodes.

The present disclosure relates to circuitry comprising: digital circuitry configured to generate a digital output signal; and monitoring circuitry configured to monitor a supply voltage to the digital circuitry and to output a control signal for controlling operation of the digital circuitry, wherein the control signal is based on the supply voltage.

A calibration circuit, including: a first analog-to-digital converter (ADC) configured to sample a nonlinear reference signal continuously at an equidistant sampling rate to generate a reference sampled signal; a trigger timer configured to generate trigger signals; a second ADC configured to sample a point of each of the nonlinear reference signal and repeated versions of the nonlinear reference signal in response to the respective trigger signals at equidistantly increasing delays, to generate a device-under-test (DUT) sampled voltage; and processing circuitry configured to estimate a differential nonlinearity (DNL) of the DUT sampled signal, estimate a DNL of the reference sampled signal, and compare the estimated DNL of the DUT sampled signal with the estimated DNL of the reference sampled signal, to generate a DNL performance indication signal of the second ADC.

A system and method are described herein, for determining operational status of one or more power-over-Ethernet powered loudspeakers, the system and method comprising: receiving audio data at an audio receiver; transmitting the received audio data from the audio receiver to one or more audio data interface devices using an audio-over-Internet Protocol (AoIP) encoding scheme using an Ethernet cable; receiving the transmitted AoIP encoded audio data at audio data interface device, converting the encoded audio data to an analog audio data signal, transmitting the analog audio data signal to at least one loudspeaker, and broadcasting the same as an acoustic audio signal; substantially continuously receiving and storing status information by a status monitor located in the audio data interface device; and transmitting the received and stored status information to the audio receiver.

A semiconductor device capable of detecting a failure of an A/D converter during execution of a normal A/D conversion operation while suppressing an increase in a circuit size is provided. The semiconductor device includes an addition circuit that receives an input of a first analog voltage signal and adds an offset voltage to the first analog voltage signal to generate a second analog voltage signal, an AD conversion circuit that performs AD conversion of the second analog voltage signal to generate a digital voltage signal, and a determination circuit that determines whether a failure has occurred in the AD conversion circuit based on the digital voltage signal.

Described herein is a system and method for substantially automatically establishing secure communications between similar audio devices, comprising: determining that at least two of two or more audio devices in an audio distribution network are similar audio devices, wherein the similar audio devices are manufactured by the same manufacturer and share a common secure communications protocol; designating one of the at least two or more similar audio devices as the controlling audio device; and issuing communications protocols by the controlling device to the remaining similar audio device, wherein the communications protocols are secure communications protocols, and wherein communications between the similar devices from therein after use the secure communications protocols.

Disclosed herein is a system and method for optimizing audio equalization settings based on the type of music being broadcast, comprising: receiving audio at a processing device; performing a frequency analysis of the received audio, to determine a plurality of frequency components and associated amplitudes of the frequency components of the received audio; generating a spectral plot of the received audio based on the performed frequency analysis of the received audio, wherein the spectral plot comprises an x axis that represents relative amplitude and a y axis that represents frequency components of the received audio; comparing the spectral plot of the received audio to each of a plurality of different predetermined spectral plots; matching the spectral plot of the received audio to at least one of a plurality of different predetermined spectral plots; retrieving a predetermined equalizer settings file that corresponds to the at least one of the matched predetermined spectral plots, wherein the predetermined equalizer settings file comprises a plurality of relative amplitude settings for each of a plurality of frequency bands; and applying the retrieved predetermined equalizer settings to an equalizer that processes the received audio according to the predetermined equalizer settings in the predetermined equalizer settings file.

A system and method are described herein for gating at least one input to an amplifier, the method comprising: measuring at least one audio analog signal level received by the amplifier at a first input; determining whether the received at least one audio analog signal level is below a predetermined threshold level; and gating the first input such that the received audio analog signal level is ignored in further processing by the amplifier.

Described herein is a system and method for generating text caption information for an audio-video (AV) signal, the systems and method comprising: receiving an AV signal; extracting audio from the AV signal to form an extracted audio signal; time stamping both the extracted audio signal and the received AV signal; partitioning the extracted audio signal into a first predetermined duration segment of extracted audio signal; generating text captions from the partitioned extracted audio signal over a first duration, and converting the same to a video text signal, with the same time stamp as the extracted audio signal and received AV signal; delaying the received AV signal by an amount of time substantially similar to the first duration; combining the time stamped video text signal and the delayed time stamped received AV signal based on the time stamps; and outputting the combined time stamped video text signal and the time stamped received AV signal to a display.

A system and method are disclosed herein for automatically adjusting an output level of audio in an audio playback network, the method comprising: selecting an audio source to be received into, and output from, an audio playback network; setting a broadcast output volume level of the selected audio source; receiving new audio from any one of a plurality of audio sources, and broadcasting the new audio from one or more loudspeakers; substantially continuously measuring a volume level of the broadcast new audio; and correcting the broadcast new audio to match the set broadcast output volume level.