An example device in accordance with an aspect of the present disclosure includes a non-linear compensator, an interpolator, a demultiplexer, and a demodulator. The non-linear compensator is to correct a non-linearity of the input bitstream data to obtain linearized bitstream data. The interpolator is to convert a non-constant sample rate of the linearized bitstream data to obtain constant sample rate bitstream data. The demultiplexer is to demultiplex the constant sample rate bitstream data into a first waveform and a second waveform. The demodulator is to demodulate the first waveform and the second waveform.

One example discloses a communications device, including: a bio-antenna conducting surface configured to receive a set of bio-antenna modulated broadcast signals; wherein the conducting surface is configured to receive the set of bio-antenna modulated broadcast signals through a capacitively coupling; a broadcast receiver coupled to the conducting surface; and wherein the conducting surface is configured to pass the broadcast signals to the broadcast receiver.

One example discloses a communications device, including: a bio-antenna conducting surface configured to receive a set of bio-antenna modulated broadcast signals; wherein the conducting surface is configured to receive the set of bio-antenna modulated broadcast signals through a capacitively coupling; a broadcast receiver coupled to the conducting surface; and wherein the conducting surface is configured to pass the broadcast signals to the broadcast receiver.

An electronic device with a Frequency Modulation (FM) antenna includes an earphone jack, an FM chip, a switching unit, and a processing unit. The earphone jack includes a left channel pin, a right channel pin, and a ground pin. The FM chip receives an FM signal and outputs a Receive Signal Strength Indicator (RSSI) value of the FM signal to the processing unit. The processing unit receives the RSSI value, compares the RSSI value with a predetermined value, and controls the switching unit to select the left and right channel pins as a signal receiving point of the FM antenna or select the ground pin as the signal receiving point of the FM antenna according to a result of the comparison.

An electronic device with a Frequency Modulation (FM) antenna includes an earphone jack, an FM chip, a switching unit, and a processing unit. The earphone jack includes a left channel pin, a right channel pin, and a ground pin. The FM chip receives an FM signal and outputs a Receive Signal Strength Indicator (RSSI) value of the FM signal to the processing unit. The processing unit receives the RSSI value, compares the RSSI value with a predetermined value, and controls the switching unit to select the left and right channel pins as a signal receiving point of the FM antenna or select the ground pin as the signal receiving point of the FM antenna according to a result of the comparison.

The invention relates to a method for improving a stereo audio signal of an FM stereo radio receiver. The method comprises determining one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the method comprises generating the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation.

The invention relates to a method for improving a stereo audio signal of an FM stereo radio receiver. The method comprises determining one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the method comprises generating the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation.

Disclosed is a frequency amplitude modulation (FAM) transmission apparatus and method by combining a frequency modulation (FM) signal and a digital modulated amplitude modulation (AM) signal. A FAM transmission method includes receiving an FM signal created by modulating an audio signal that includes audio information for mono or stereo broadcasting based on an FM scheme; receiving a digital pulse created by modulating digital data used to provide an additional service for the mono or stereo broadcasting based on an amplitude modulation (AM) affiliated digital modulation scheme; creating an AM signal by by adjusting the digital pulse to have a value greater than 0; and creating a FAM signal by combining the FM signal and the AM signal.

An audio FM transmitter is disclosed that may achieve high-precision frequency control as well as compact size and low cost by enabling FM modulation using a fractional-N type PLL circuit.

An audio FM transmitter is disclosed that may achieve high-precision frequency control as well as compact size and low cost by enabling FM modulation using a fractional-N type PLL circuit.