Method and system for chinese speech pitch extraction

Abstract

A method and system for Chinese speech pitch extraction is disclosed. The method and system for Chinese speech pitch extraction comprises: pre-computing an anti-bias auto-correlation of a Hamming window function; for at least one frame, saving a first candidate as an unvoiced candidate, and detecting other voiced candidates from the anti-bias auto-correlation function; and calculating a cost value for a pitch path according to a voiced / unvoiced intensity function based on the unvoiced and voiced candidates, saving a predetermined number of least-cost paths, and outputting at least a portion of contiguous frames with low time delay.

Description

technical field [0001] The invention relates to the field of speech recognition. More specifically, the present invention relates to a method and system for Chinese speech pitch extraction using locally optimized dynamic programming pitch path-tracking in speech recognition. Background technique [0002] Pitch extraction is an important component in many speech processing systems. In addition to providing valuable insight into the characteristics of the stimuli that produce speech, spoken pitch profiles are also useful for speaker identification and are therefore essential in almost all speech analysis synthesis systems. Due to the importance of pitch extraction, many methods and systems for pitch extraction have been proposed in the field of speech recognition. [0003] Basically, a method or system for pitch extraction makes a voiced / unvoiced decision and provides a measure of pitch period during uttered speech. Methods and systems for pitch extraction can be roughly di...

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Problems solved by technology

For real-time speech recognition applications, this is sometimes unacceptable

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