Speech signal interpolation device, speech signal

专利名称：Speech signal interpolation device, speech

signal interpolation method, and program

发明人：Yasushi Sato申请号：US10477320申请日：20030528公开号：US07318034B2公开日：20080108

专利附图：

摘要：A voice signal interpolation apparatus is provided which can restore originalhuman voices from human voices in a compressed state while maintaining a high soundquality. When a voice signal representative of a voice to be interpolated is acquired by a

voice data input unit , a pitch deriving unit filters this voice signal to identify a pitch lengthfrom the filtering result. A pitch length fixing unit makes the voice signal have a constanttime length of a section corresponding to a unit pitch, and generates pitch waveformdata. A sub-band dividing unit converts the pitch waveform data into sub-band datarepresentative of a spectrum. A plurality of sub-band data pieces are averaged by anaveraging unit and thereafter a sub-band synthesizing unit converts the sub-band datapieces into a signal representative of a waveform of the voice by a sub-band synthesizingunit . The time length of this signal in each section is restored by a pitch restoring unitand a sound output unit reproduces the sound represented by the signal.

申请人：Yasushi Sato

地址：Nagareyama JP

国籍：JP

代理机构：Robinson Intellecutal Property Law Office, P.C.

代理人：Eric J. Robinson

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