| 摘要 |
digital processing of speech. SUBSTANCE: process is intended for use in systems of speech answer to subscribers of telephone network, in information services, for sounding announcements on transport or in other public places. Process includes division of signal of due word preliminary recorded in on-line storage into sections of equal length, computation of mean modulus of this signal and number of changes of sign in each of them. These data are used to define two images of processed word that describe character of change of its signal by level and instantaneous frequency in time. Decreased capacity of speech information needed for storage and playback is obtained by determination of sections of local stationarity in which level of signal and its instantaneous frequency almost do not change simultaneously, by isolation of section of signal which serves as standard period of basic tone of speech inside each such section, by re-recording of given sections of signal one after another into permanent storage supplying each of them with password containing information on duration of given section of signal, on number of its repetitions during of playback of word and on value of adaptive period of quantization proportional to mean modulus of signal across given section of local stationarity. EFFECT: decreased capacity of information storage used for memorization and playback of required speech information. 4 dwg
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