Abstract: Circuit, method for audio signal processing with excursion estimation compensation, and non-transitory storage medium are provided. The circuit comprises a delay circuit, compensation filter, excursion estimator, peak detector, gain determination circuit, and gain adjustment circuit. The delay circuit is for delaying a digital audio signal to output a delayed digital audio signal. The compensation filter is for generating a compensated digital audio signal according to the digital audio signal for excursion estimation compensation for a speaker type. The excursion estimator is for determining an estimated excursion signal for the speaker type according to the compensated digital audio signal. The gain determination circuit is for generating a gain setting signal according to the estimated excursion signal and a threshold value. The gain adjustment circuit is for generating an adjusted digital audio signal according to the gain setting signal and delayed digital audio signal.

Abstract: A scam detection system includes a user computer that runs a security application and a backend system that runs a scam detector. An email is received at the user computer. The security application extracts and forwards a content of the email, which includes a body of the email, to the backend system. The email body of the email is anonymized by removing personally identifiable information from the email body. A hash of the anonymized email body is generated and compared against hashes of a whitelist and a blacklist. The anonymized email body is classified. A segment of text of the anonymized email body is identified and provided to the user computer when the anonymized email body is classified as scam.

Abstract: A parametric equalizer includes an equalizer circuit, a first protection circuit, a second protection circuit, and a first addition circuit. The equalizer circuit is arranged to receive an input signal, and process the input signal to generate an output signal. The first protection circuit is arranged to generate a first protection signal according to the output signal, the input signal, and a first processed signal. The second protection circuit is arranged to generate a second protection signal according to the input signal and a second processed signal. The first addition circuit is coupled to the first protection circuit and the second protection circuit, and is arranged to combine the first protection signal and the second protection signal to generate an equalizer output signal.

Abstract: A parametric equalizer includes an equalizer circuit, a first protection circuit, a second protection circuit, and a first addition circuit. The equalizer circuit is arranged to receive an input signal, and process the input signal to generate an output signal. The first protection circuit is arranged to generate a first protection signal according to the output signal, the input signal, and a first processed signal. The second protection circuit is arranged to generate a second protection signal according to the input signal and a second processed signal. The first addition circuit is coupled to the first protection circuit and the second protection circuit, and is arranged to combine the first protection signal and the second protection signal to generate an equalizer output signal.

Abstract: A switch circuit provides a first output signal and a second output signal for switching between ternary modulation and quaternary modulation for a target device. A first output signal is provided from one of a first signal, a second signal and a ground signal according to an input signal and a duty signal, wherein the first signal is generated through performing a one-bit left-shift operation for the input signal, and the second signal is generated through adding the input signal and the duty signal. A second output signal is provided from one of a third signal, a fourth signal and the ground signal according to the input signal and the duty signal, wherein the third signal is generated through subtracting the input signal from the duty signal, and the fourth signal is generated through performing a two's-complement transformation and the one-bit left-shift operation for the input signal.

Abstract: A smart home includes Internet of things (IOT) devices that are paired with an IOT gateway. A backend system is in communication with the IOT gateway to receive IOT operating data of the IOT devices. The backend system generates a machine learning model for an IOT device. The machine learning model is consulted with IOT operating data of the IOT device to detect anomalous operating behavior of the IOT device. The machine learning model is updated as more and newer IOT operating data of the IOT device are received by the backend system.

Abstract: A virtual bass generating circuit used in a speaker is used to filter out a high frequency part of an audio signal to generate a low passed audio signal, generates an even and odd audio signals respectively having even and odd harmonics of the low passed audio signal according to the low passed audio signal, subtracts an amplified low passed audio signal from an addition of an amplified even audio signal and an amplified odd audio signal to generate a first calculated audio signal, filters out a low frequency part and a high frequency part of the first calculated audio signal to generate a band passed audio signal, and adds the band passed audio signal and the audio signal to generate a second calculated audio signal with enhanced even and odd harmonics of the audio signal.

Abstract: A virtual bass generating circuit used in a speaker is used to filter out a high frequency part of an audio signal to generate a low passed audio signal, generates an even and odd audio signals respectively having even and odd harmonics of the low passed audio signal according to the low passed audio signal, subtracts an amplified low passed audio signal from an addition of an amplified even audio signal and an amplified odd audio signal to generate a first calculated audio signal, filters out a low frequency part and a high frequency part of the first calculated audio signal to generate a band passed audio signal, and adds the band passed audio signal and the audio signal to generate a second calculated audio signal with enhanced even and odd harmonics of the audio signal.

Abstract: A hand gesture recognition method according to the present disclosure is applied to a touch panel comprising a plurality of sensors, each of which generating a sensing value according to a touch operation. The method includes providing a first reference value and a second reference value; generating a count value by counting a quantity of the sensing values that are greater than a threshold; determining the touch operation as a first hand gesture when the count value is greater than the first reference value but smaller than the second reference value; and determining the touch operation as a second hand gesture when the count value is greater than the second reference value.

Abstract: A method for determining a displacement of a touch point is applied to a touch panel to reduce noise interfering with determination of the displacement. The method includes obtaining a displacement according to a movement of a touch point on the touch panel; checking whether the displacement is within a predetermined range; and determining that the movement is valid when the displacement is within the predetermined range.

Abstract: A touch sensing method and associated circuit are provided. In one aspect, a touch control circuit includes a first current source, a second current source, a plurality of switches, a hysteresis comparator, a frequency divider and a flip-flop. The switches are couple to a plurality of external contact points. The hysteresis comparator is coupled to a first reference comparison voltage and a second reference comparison voltage. Each of the external contact points is selectively coupled to an input terminal of the hysteresis comparator through the switches. The first current source and the second current source are coupled to the input terminal of the hysteresis comparator to generate a sensing voltage. The hysteresis comparator compares the sensing voltage with the first reference comparison voltage and the second reference comparison voltage to generate a hysteresis comparison output to control the first current source or the second current source.

Abstract: A digital apparatus includes a timing control circuit, a period counter, a phase digitizer and a calculation circuit. The timing control circuit generates a first control signal according to a square wave signal and a predetermined value. The period counter generates a first digital value according to a reference clock signal and the first control signal. The phase digitizer generates a second digital value according to a phase difference between the square wave signal and the reference clock signal. The calculation circuit generates an output digital value according to the first digital value and the second digital value. An object of obtaining a high-resolution digitization with a reasonable sampling clock is realized by effectively combining the period counter with the phase digitizer.

Abstract: A hand gesture recognition method according to the present disclosure is applied to a touch panel comprising a plurality of sensors, each of which generating a sensing value according to a touch operation. The method includes providing a first reference value and a second reference value; generating a count value by counting a quantity of the sensing values that are greater than a threshold; determining the touch operation as a first hand gesture when the count value is greater than the first reference value but smaller than the second reference value; and determining the touch operation as a second hand gesture when the count value is greater than the second reference value.

Abstract: A touch control apparatus includes a touch panel and a sensing control apparatus. The touch panel includes a plurality of sensing lines, and the sensing control apparatus includes a plurality of pins that are respectively coupled to the sensing lines. The sensing control apparatus adaptively controls a sequence for scanning the pins according to connection relationships between the pins and the sensing lines.

Abstract: A method for determining a displacement of a touch point is applied to a touch panel to reduce noise interfering with determination of the displacement. The method includes obtaining a displacement according to a movement of a touch point on the touch panel; checking whether the displacement is within a predetermined range; and determining that the movement is valid when the displacement is within the predetermined range.

Abstract: A digital apparatus includes a timing control circuit, a period counter, a phase digitizer and a calculation circuit. The timing control circuit generates a first control signal according to a square wave signal and a predetermined value. The period counter generates a first digital value according to a reference clock signal and the first control signal. The phase digitizer generates a second digital value according to a phase difference between the square wave signal and the reference clock signal. The calculation circuit generates an output digital value according to the first digital value and the second digital value. An object of obtaining a high-resolution digitization with a reasonable sampling clock is realized by effectively combining the period counter with the phase digitizer.

Abstract: A touch sensing method and associated circuit are provided. In one aspect, a touch control circuit includes a first current source, a second current source, a plurality of switches, a hysteresis comparator, a frequency divider and a flip-flop. The switches are couple to a plurality of external contact points. The hysteresis comparator is coupled to a first reference comparison voltage and a second reference comparison voltage. Each of the external contact points is selectively coupled to an input terminal of the hysteresis comparator through the switches. The first current source and the second current source are coupled to the input terminal of the hysteresis comparator to generate a sensing voltage. The hysteresis comparator compares the sensing voltage with the first reference comparison voltage and the second reference comparison voltage to generate a hysteresis comparison output to control the first current source or the second current source.

Abstract: A toilet seat device includes an annular base member rotatably attached onto a toilet bowl, and a board for safely and stably supporting children on the annular base member. The board is coupled to the annular base member and supportable on a horizontal working position to support the feet of the children. A plate is rotatably coupled between the annular base member and the board. The plate and the board may be received in the annular base member. A panel may be secured to the board at a perpendicular position, to support the board at the horizontal working position.