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AssigneeDolby International AB
InventorsJonas Engdegard, Heiko Purnhagen, Karl Jonas Roeden
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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.
An apparatus for improving a left/right or mid/side audio signal output by an FM stereo radio receiver, the apparatus comprising:
A method for improving a left/right or mid/side audio signal of an FM stereo radio receiver, the FM stereo radio receiver configured to receive an FM radio signal, the method comprising:
Dependencies are inferred from the claim text.