音声のピッチ抽出に関するシンポジウム : ピッチ抽出器試作結果

概要

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An instrument has been developed as a part of a formant-vocoder for smoothly detecting wide-range voice pitch frequencies. Speech signals from a conventional telephone are cross-modulated, low-passed, frequency-inverted, and frequency-analyzed. Analyzed signals are discriminated separately, and their DC output voltages are compared in a simple diode adder in order to select the most significant voltage which indicates the pitch frequency. The voltage-versus-frequency characteristic is closely linear, and the response time is comparatively small. The temperature characteristic, however, is not satisfactorily good yet.
社団法人日本音響学会の論文
1960-12-30