Sound signal generating method, sound signal generating device

Abstract

A sound signal generating method and a sound signal generating device where high quality sound in which sound quality deterioration such as a noise sensitivity or a surface roughness sensitivity is suppressed is generated by processing the original sound signal to generate the processed sound signal are provided. The processed sound signal is generated by separating the original sound signal in the pitch unit of a waveform to generate a plurality of unit waveform signals, generating a repetition waveform signal for repeating the waveform of the generated unit waveform signals by the number of predetermined times for each of the unit waveform signals, and moving each of the repetition waveform signals in the order in which the original sound signal is formed in the pitch unit and superposing on one another.

Description

technical field [0001] The present invention relates to an audio signal generation method for generating a processed audio signal by processing an original audio signal, and an audio signal generation device to which the audio signal generation method is applied. Background technique [0002] In recent years, a function of reading text data of emails and website contents by voice has been installed in embedded devices such as cellular phones. In the speech synthesis processing for realizing such a speech reading function, the speech unit data required for synthesizing speech by a compression method such as ADPCM (Adaptive Differential Pulse Code Modulation, Adaptive Differential Pulse Code Modulation) is recorded in a recording unit such as a built-in memory in advance. The database recorded for compression is the waveform library. In addition, when generating a synthesized speech waveform, the compressed speech segment data is read from the waveform library, decompressed a...

AI Technical Summary

Problems solved by technology

[0009] However, the method of lowering the compression ratio has a problem of increasing the memory capacity required for the waveform library, and the method of eliminating noise by frequency conversion has the problem of increasing the processing load.

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