Abstract: A receiver of a frequency modulation (FM) signal includes an antenna, a tuner, an analog-to-digital converter (ADC), a demodulation module and a frequency offset estimation module. The antenna receives a FM signal. The tuner coupled to the antenna is for converting the FM signal into an intermediate frequency signal. The ADC coupled to the tuner is for converting the intermediate frequency signal into a digital intermediate frequency signal. The demodulation module coupled to the ADC is for demodulating the digital intermediate frequency signal into an audio signal based on a frequency offset compensation signal. The frequency offset estimation module coupled to the demodulation module is for generating the frequency offset compensation signal according to the audio signal.

Abstract: An apparatus includes a receiving circuit, a demodulation module, a frame synchronization control module, a filter, and an audio conversion device. The receiving circuit is used to receive a radio frequency signal and generate a corresponding baseband signal. The demodulation module is electrically connected to the receiving circuit for demodulating the baseband signal and for correspondingly outputting sequential data. The frame synchronization control module is electrically connected to the demodulation module for synchronizing the data and outputs the sequential data. The filter is electrically connected to the frame synchronization control module for filtering out erroneous data outputted from the frame synchronization control module. The audio conversion device is connected to the filter for transferring an output of the filter into a corresponding audio signal.

Abstract: A wireless audio system for transmitting and receiving multiplexed audio and data information. The wireless audio system includes a the transmitter and a receiver that respectively include a novel apparatus for providing multiplexed audio and data delivering so that the wireless audio system can receive a plurality of input signals of various types including a digital audio input signal, an analog audio input signal, and a control input signal and output a plurality of corresponding output signals of various types including a digital audio output signal, an analog audio output signal, and a control output signal.

Abstract: An apparatus includes a receiving circuit, a demodulation module, a frame synchronization control module, a filter, and an audio conversion device. The receiving circuit is used to receive a radio frequency signal and generate a corresponding baseband signal. The demodulation module is electrically connected to the receiving circuit for demodulating the baseband signal and for correspondingly outputting sequential data. The frame synchronization control module is electrically connected to the demodulation module for synchronizing the data and outputs the sequential data. The filter is electrically connected to the frame synchronization control module for filtering out erroneous data outputted from the frame synchronization control module. The audio conversion device is connected to the filter for transferring an output of the filter into a corresponding audio signal.