| 摘要 |
PROBLEM TO BE SOLVED: To provide a speech synthesizer for superimposing a modulation signal free from hearing discomfort, without restricting a band width of speech. SOLUTION: In a waveform memory 131N for indicating a tone of noise in a sound source 13, a waveform is stored as a pseudo noise code stream (a waveform of pseudo noise) with high autocorrelation such as a pseudo noise (PN) code. Data communication is carried out by controlling a polarity of the pseudo noise code stream of the waveform memory 131N by a control section 14. When bit data of transmission data 141 is "1", the PN code is output as it is. When the bit data of the transmission data 141 is "0", it is output by reversing a polarity of the PN code (an anti-phase). COPYRIGHT: (C)2010,JPO&INPIT
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