Nec Corporation

Satoshi Tsukada

Takao Watanabe

Masanori Kato

Masanori Tsujikawa

Eiji Takada

A voice separation meansseparates an input voice of a volume adjusted by an input volume adjustment means, into a voice recognition voice and a monitoring voice. A monitoring volume adjustment meansadjusts a volume of the monitoring voice. An output volume adjustment meansadjusts a volume of an output voice and causes an output device to output the output voice of the adjusted volume, the output voice being a voice obtained by synthesizing a synthetic voice and the monitoring voice of the volume adjusted by the monitoring volume adjustment means, the synthetic voice being a voice synthesized from information generated as a result of voice recognition of the voice recognition voice. A control meansinstructs the monitoring volume adjustment meansto adjust the volume of the monitoring voice so that an amplification factor of the volume of the output voice with respect to the volume of the input voice does not exceed 1.

Voice input/output device, method and programme for preventing howling

Apparatus and method for generating high quality synthesized speech having smooth waveform concatenation. The apparatus includes a pitch frequency calculation section, a pitch synchronization position calculation section, a unit waveform storage, a unit waveform selection section, a unit waveform generation section, and a waveform synthesis section. The unit waveform generation section includes a conversion ratio calculation section, a sampling rate conversion section, and a unit waveform re-selection section. The conversion ratio calculation section calculates a sampling rate conversion ratio from the pitch information and the position of pitch synchronization, and the sampling rate conversion section converts the sampling rate of the unit waveform, delivered as input, based on the sampling rate conversion ratio. The unit waveform re-selection section selects, from the sampling-rate-converted unit waveform, the unit waveform having a phase necessary to obtain a synthesized speech waveform which will exhibit smooth waveform concatenation.

Method, apparatus and program for speech synthesis

In a speech recognition device including a similarity calculator for calculating a usual similarity as a provisional similarity between an input pattern and prepared reference patterns, a calculating arrangement calculates a reference similarity between the input pattern and produced reference patterns. A correcting unit corrects the provisional similarity by the reference similarity into a corrected similarity. As usual, the similarity may be a dissimilarity. The prepared reference patterns may be memorized in the calcultor or be given by concatenations of primary recognition units. Preferably, the produced reference patterns are concatenations of secondary recognition units memorized in a memory.

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Minato-ku, Japan

Satoshi Tsukada