摘要:
The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine 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 apparatus comprises an upmix stage. The upmix stage is configured to generate 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 in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.
摘要:
Methods and apparatus are described, including a method of receiving an audio signal, the method comprising receiving a modulated signal, demodulating the modulated signal to obtain the audio signal, detecting attenuation of the received modulated signal and, if attenuation is detected, holding or filtering the audio signal. The energy level of the received modulated signal is monitored and compared with a fixed or variable threshold.
摘要:
Methods and devices are provided for recording radio broadcasts received in an analog format at a mobile communication device. The mobile communication device receives analog radio broadcast signals and analog radio data system information signals corresponding to the analog radio broadcast signals. A radio application extracts radio data system information in response to users selecting a record operation, creates a file name from the extracted radio data system information, and stores radio content corresponding to the extracted radio data system information in response to the user selecting the record operation. The radio application further monitors the radio data system information for pre-defined criteria and sends alerts to the user upon detecting the pre-defined criteria. In response to selecting the record operation, the radio application further enables users to rewind the stored radio content by a pre-determined amount and append buffered radio content to a beginning of the stored radio content.
摘要:
A method comprises detecting whether or not a frequency modulation broadcast receiver is tuned to an overdeviated frequency modulated broadcast, or is at a location where overdeviated frequency modulated broadcasts exist or has received a user input indicating the presence of an overdeviated frequency modulated broadcast; and in response to the detection, automatically adjusting operation of the frequency modulated broadcast receiver. Automatically adjusting operation comprises adjusting one or more parameters or settings in such a way as to alter the susceptibility of a speaker arrangement to the possibility of being overdriven by overdeviated frequency modulated broadcasts.
摘要:
The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine 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 apparatus comprises an upmix stage. The upmix stage is configured to generate 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 in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.
摘要:
A method comprises detecting whether or not a frequency modulation broadcast receiver is tuned to an overdeviated frequency modulated broadcast, or is at a location where overdeviated frequency modulated broadcasts exist or has received a user input indicating the presence of an overdeviated frequency modulated broadcast; and in response to the detection, automatically adjusting operation of the frequency modulated broadcast receiver. Automatically adjusting operation comprises adjusting one or more parameters or settings in such a way as to alter the susceptibility of a speaker arrangement to the possibility of being overdriven by overdeviated frequency modulated broadcasts.
摘要:
The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine 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 apparatus comprises an upmix stage. The upmix stage is configured to generate 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 in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.