Low Rate Sinusoidal Coding of Speech Using an Improved Phase Matching Algorithm*
نویسندگان
چکیده
PHASE MATCHING ALGORITHM* Sassan Ahmadi and Andreas S. Spanias Department of Electrical Engineering Telecommunications Research Center Arizona State University Tempe, AZ 85287-7206 USA ABSTRACT A new phase model for low-bit rate sinusoidal coding of speech is presented. Short-time sinusoidal phases are approximated using a combination of linear prediction, spectral sampling, delay compensation, and phase correction techniques. The algorithm is di erent than phase compensation methods proposed for source-system LPC in that it has been tailored to sinusoidal representation of speech. Performance analysis on a large speech database indicates considerable improvement in temporal and spectral signal matching as well as improved subjective quality of the reconstructed speech. The extra parameters used for representation of the sine wave phases require a small number of bits. The method can be applied to enhance phase matching in low-bit rate sinusoidal coders, where underlying sine wave amplitudes are extracted from an all-pole model.
منابع مشابه
A new sinusoidal phase modeling algorithm
Sassan Ahmadi and Andreas S. Spanias Department of Electrical Engineering Telecommunications Research Center Arizona State University Tempe, AZ 85287-7206 USA ABSTRACT A new phase modeling algorithm for sinusoidal analysis and synthesis of speech signals is presented. Short-time sinusoidal phases are e ciently approximated by incorporating linear prediction, spectral sampling, delay compensatio...
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