Improvement of an audio signal of an fm stereo radio receiver by using parametric stereo
AssigneeDolby International AB
InventorsJonas ENGDEGARD, Heiko PURNHAGEN, Karl Jonas ROEDEN
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Abstract
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.
Claims21
An method for improving a left/right or mid/side audio signal output by a frequency modulation (FM) stereo radio receiver, the method comprising:
- receiving the left/right or mid/side audio signal from the FM stereo radio receiver;
- generating a first audio signal based on the left/right or mid/side audio signal by a downmix operation;
- determining one or more parametric stereo parameters based on the left/right or mid/side audio signal in a frequency-variant or frequency-invariant manner;
- and
- generating a stereo signal based on the first audio signal and the one or more parametric stereo parameters.
Dependencies are inferred from the claim text.