Patent ID: 7304229

Claim:
A karaoke scoring apparatus for scoring the performance of a singer with a karaoke system, the karaoke system comprising a predetermined reference audio input and being capable of accepting a target audio input compared with the reference audio input for giving a score by the karaoke scoring apparatus, the karaoke scoring apparatus respectively sampling the reference audio input and the target audio input, and sequentially transforming the reference audio input and the target audio input to a plural frames of reference sampling signals and a plural frames of target sampling signals, the karaoke scoring apparatus comprising: a memory element for temporarily storing at least one frame of reference sampling signal and at least one frame of target sampling signal; a feature extraction element for performing an autocorrelation calculation on the frame of reference sampling signal temporarily stored in the memory element and the plural frames of reference sampling signals that are differently delayed to generate a set of reference characteristic values, the feature extraction element for performing the autocorrelation calculation on the frame of target sampling signal temporarily stored in the memory element and the plural frames of target sampling signals that are differently delayed to generate a set of target characteristic values; a similarity measurement element, according to the set of target characteristic values and the set of reference characteristic values, for performing a similarity comparing procedure to generate a similarity result corresponding to the frame of reference sampling signal and the frame of target sampling signal; and a scoring element for calculating the similarity results corresponding to the plural frames of sampling signals to output a final score.