Abstract: Provided is an active noise cancellation (ANC) method applied for an ANC headphone. The ANC method includes: in a channel estimation mode, estimating a plurality of environment channels by generating, transmitting and capturing a training signal; in the channel estimation mode, tuning a plurality of ANC filters based on the estimated plurality of environment channels; and in a normal mode, performing ANC on an input signal based on the plurality of ANC filters.

Abstract: Provided is an active noise cancellation (ANC) method applied for an ANC headphone. The ANC method includes: in a channel estimation mode, estimating a plurality of environment channels by generating, transmitting and capturing a training signal; in the channel estimation mode, tuning a plurality of ANC filters based on the estimated plurality of environment channels; and in a normal mode, performing ANC on an input signal based on the plurality of ANC filters.

Abstract: An electronic device includes an audio reception circuit, a processing circuit and at least one movable component. The audio reception circuit receives an audio data. The processing circuit performs an audio feature analysis on the audio data to obtain audio feature data, and determines a corresponding action event according to audio feature data to generate an action control signal corresponding to the action event. The movable component performs the action event in response to the action control signal.

Abstract: A voice enhancement method for distributed system is disclosed. In the method of the present invention, a plurality of picking devices are disposed in a space for picking voice signal. The picking devices communicate with each other and have an enhancement operation on the voice information from each picking device to generate an enhanced voice signal.

Abstract: A wireless speaker system including one or more self-propelled speaker device is provided. The self-propelled speaker device includes a processing unit, a wireless audio transmitter/receiver unit, a speaker unit, a tracking unit, and an actuator. The wireless audio transmitter/receiver unit is coupled to the processing unit and configured to receive an audio signal via a wireless transmission interface. The speaker unit is coupled to the processing unit and configured to produce sound according to the audio signal. The tracking unit is coupled to the processing unit and configured to track a location of a mobile device. The actuator is coupled to the processing unit. The processing unit controls the actuator according to the location of the mobile device. The actuator drives the self-propelled speaker device to move along with the mobile device.

Abstract: A wireless speaker system including one or more self-propelled speaker device is provided. The self-propelled speaker device includes a processing unit, a wireless audio transmitter/receiver unit, a speaker unit, a tracking unit, and an actuator. The wireless audio transmitter/receiver unit is coupled to the processing unit and configured to receive an audio signal via a wireless transmission interface. The speaker unit is coupled to the processing unit and configured to produce sound according to the audio signal. The tracking unit is coupled to the processing unit and configured to track a location of a mobile device. The actuator is coupled to the processing unit. The processing unit controls the actuator according to the location of the mobile device. The actuator drives the self-propelled speaker device to move along with the mobile device.

Abstract: The present invention provides an apparatus and method for reducing harmonic interference to GPS signal reception. The apparatus comprises a RF transceiver module, a GPS signal reception path, and a harmonic distortion predictor. The RF transceiver module generates a first signal to be transmitted. The harmonic distortion predictor is used for establishing an estimated harmonic distortion sample based on the first signal. The GPS signal reception path receives an analog GPS signal, and converts the analog GPS signal into a digital GPS signal. The digital GPS signal subtracts the estimated harmonic distortion sample to obtain an accurate digital GPS signal. Thereby, the harmonic interference may be eliminated from the GPS signal in digital domain by means of digitally form so as to reduce distortion of the GPS signal.

Abstract: An electronic device includes an audio reception circuit, a processing circuit and at least one movable component. The audio reception circuit receives an audio data. The processing circuit performs an audio feature analysis on the audio data to obtain audio feature data, and determines a corresponding action event according to audio feature data to generate an action control signal corresponding to the action event. The movable component performs the action event in response to the action control signal.

Abstract: A voice enhancement method is disclosed. The method of the present invention is adapted for a distributed system. In the present invention, a plurality of picking devices are disposed in a space for picking voice signal. After determining the positions of the picking devices, an enhancement operation is performed on the waveform signals from the picking devices to generate an enhanced voice signal.

Abstract: An apparatus and method for improved processing of audio and video in the wireless multimedia communication. By setting a SNR estimator in the de-modulator and connecting a PLC trigger between the de-modulator and the PLC module in parallel. The SNR estimator can calculate the signal to noise ratio (SNR) of the wireless signal in the de-modulator directly. The PLC trigger can calculate the losing condition of the digital signal and make the decision whether proceeds the packet loss concealment (PLC) depend on the condition to make the PLC to the highest efficiency.

Abstract: A voice enhancement method is disclosed. The method of the present invention is adapted for a distributed system. In the present invention, a plurality of picking devices are disposed in a space for picking voice signal. After determining the positions of the picking devices, an enhancement operation is performed on the waveform signals from the picking devices to generate an enhanced voice signal.

Abstract: A voice enhancement method for distributed system is disclosed. In the method of the present invention, a plurality of picking devices are disposed in a space for picking voice signal. The picking devices communicate with each other and have an enhancement operation on the voice information from each picking device to generate an enhanced voice signal.

Abstract: A tuner for crosstalk cancellation comprises a plurality tuner units and a crosstalk cancellation unit, wherein the crosstalk cancellation unit is connected to each tuner unit. Tuner units are used for receiving analog signals with same frequency band or different frequency bands respectively, and converting the analog signal to a digital signal. The crosstalk cancellation unit receives digital signals from each tuner unit, and executes operation or algorithm of each digital signal to cancel the crosstalk of each analog signal on tuner units and/or analog front ends.

Abstract: The present invention discloses a narrow band interference detector for a receiver of a communication system. The narrow band interference detector includes a numerically-controlled oscillator (NCO), for generating an oscillating signal according to a time-variable frequency; a mixer, for mixing an input signal with the oscillating signal, to generate a mixed signal; a phase lock loop (PLL), for locking the mixed signal during a detection period according to the time-variable frequency; a first switch, for controlling a connection between the NCO and the PLL according to a desirable narrow band interference signal type of the at least one narrow band interference signal; and a narrow band determination unit, for determining at least one narrow band interference signal according to a low frequency component of the mixed signal, the time-variable frequency and the desirable narrow band interference signal type of the at least one narrow band interference signal.

Abstract: The present invention discloses a timing recovery module of a receiver of a communication system. The timing recovery module includes a timing error calculating unit, for calculating a timing error according to an output signal of an equalizer of the receiver; and a multiplexer, for receiving the timing error, a specific negative timing error and a specific positive timing error, and outputting one of the timing error, the specific negative timing error and the specific positive timing error as a timing adjustment value according to a main tape coefficient, a most negatively adjacent tape coefficient and a most positively adjacent tape coefficient of the equalizer.

Abstract: The present invention discloses a narrow band interference detector for a receiver of a communication system. The narrow band interference detector includes a numerically-controlled oscillator (NCO), for generating an oscillating signal according to a time-variable frequency; a mixer, for mixing an input signal with the oscillating signal, to generate a mixed signal; a phase lock loop (PLL), for locking the mixed signal during a detection period according to the time-variable frequency; a first switch, for controlling a connection between the NCO and the PLL according to a desirable narrow band interference signal type of the at least one narrow band interference signal; and a narrow band determination unit, for determining at least one narrow band interference signal according to a low frequency component of the mixed signal, the time-variable frequency and the desirable narrow band interference signal type of the at least one narrow band interference signal.

Abstract: A method for enhancing Ethernet channel impairment comprises the steps of sending a sequence to a receiver in a slave transceiver by a master transceiver, and training cancellation filter coefficients of an echo canceller and a near-end cross talk canceller in the master transceiver before the receiver of the slave transceiver converges.

Abstract: A method for estimating a length of a channel in a wired communication system includes receiving a plurality of signals transmitted continuously via the channel, determining relation between a signal and at least one signal in the of the plurality of signals, to generate a decision result, and determining the length of the channel according to the decision result.

Abstract: A method for estimating cable length includes steps of generating a detection signal to a cable, wherein the detection signal includes a first pulse and a second pulse with opposite voltages in sequence; receiving a refection signal of the detection signal from the cable; and determining length of the cable according to a superposed waveform of the detection signal and the refection signal.

Abstract: A method for pre-distorting a power amplifier comprises the steps of: inputting a baseband digital training signal with time-varying amplitude into a transmitting end in a single operation; converting the baseband digital training signal to a radio-frequency analog training signal, and converting the radio-frequency analog training signal to a radio-frequency analog transmitting signal via a power amplifier; receiving the radio-frequency analog transmitting signal at a receiving end, and converting the received signal to a baseband digital receiving signal; and calculating parameters for pre-distorting the power amplifier by estimating the characteristic curve of the power amplifier according to the baseband digital receiving signal.