SU964710A1 - Method of measuring formant oscillations of speech signals - Google Patents

Method of measuring formant oscillations of speech signals Download PDF

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Publication number
SU964710A1
SU964710A1 SU803220663A SU3220663A SU964710A1 SU 964710 A1 SU964710 A1 SU 964710A1 SU 803220663 A SU803220663 A SU 803220663A SU 3220663 A SU3220663 A SU 3220663A SU 964710 A1 SU964710 A1 SU 964710A1
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formant
measuring
signals
oscillations
speech signals
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SU803220663A
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Russian (ru)
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Валентин Владимирович Рыжиков
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Минский радиотехнический институт
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(54) СПОСОБ ИЗМЕРЕНИЯ ПЕРИОДА ФОРМАНТНЫХ КОЛЕБАНИЙ РЕЧЕШХ СИГНАЛОВ(54) METHOD FOR MEASURING THE PERIOD OF FORMANT VIBRATIONS OF SPEECH SIGNALS

Изобретение относитс  к акустике и может быть использовано дл  автоматического распознавани  и компрессии речи.This invention relates to acoustics and can be used for automatic recognition and compression of speech.

Известен способ измерени  периода формантных колебаний речевого сигнала , при котором выдел ют частотную область существовани  отдельной форманты , выделенный сигнал ограничивают; формируют сигнеипы в момент времени, соответствующие его переходам через нуль, выдел ют сигналы голосового возбуждени  речевого тракта и регистрируют врем , соответствующее определенному числу сформированных сигналов , следующих за сигналом возбуждени  С ЗОднако известному способу присущи следующие недостатки:A known method of measuring the period of formant oscillations of a speech signal, at which the frequency domain of existence of a separate formant is distinguished, the selected signal is limited; Signals are formed at the time point corresponding to its zero crossings, voice excitation signals of the vocal tract are selected, and time corresponding to a certain number of generated signals following the excitation signal C is recorded. However, the following drawbacks are inherent in the known method:

зависимость точности и надежности измерени  периода форматного коле бани  от надёжности выделени  из речевого сигнала сигналов голосового возбуждени  речевого трактаdependence of the accuracy and reliability of measuring the period of the format wheel bath from the reliability of extracting voice signals from the voice path from the speech signal

врем  измерени  периода форматного колебани  определ етс  временем, 11еобходимым дл  выделени  импульсов голосового возбуждени , которое может оказатьс  достаточно большим в случае использовани  дл  этойthe measurement time of the period of the format oscillation is determined by the time required for the extraction of voice excitation pulses, which can be quite long if used for this purpose.

цели совершенных методов анализа основного тона.goals of perfect pitch analysis methods.

Известен также способ измерени  периода формантных колебаний речевых сигналов путем выделени  сигналов полосы частот, соответствующей отдельной форманте, ограничени  выделенных сигналов,формировани  сигналов в моменты времени, соот10 ветствующие переходам через нуль речевого сигнала, преобразовани  , интервалов времени между соседними сформированными сигналами в сигналы , амплитуда которых пропорцио15 нальна этим временным интервалам, подсчитывают сигналы с одинаковой амплитудой за заданное врем  измерени  и определ ют полупериод формантных колебаний по амплитуде сигналов, число которых максимально рThere is also known a method of measuring the period of formant oscillations of speech signals by extracting signals of a frequency band corresponding to a separate formant, limiting selected signals, generating signals at time instants corresponding to zero transitions of a speech signal, converting time intervals between adjacent formed signals to signals whose amplitude proportional to these time intervals, calculate the signals with the same amplitude for the specified measurement time and determine half d formant vibrations in the amplitude of the signals, the number of which is maximum

Недостатком известного способа  вл етс  зависи1«юсть формы спектра от частоты основного тона, что вызывает значительную погрешность измерений.The disadvantage of this method is the dependence of the shape of the spectrum on the pitch frequency, which causes a significant measurement error.

Claims (2)

1.Патент США № 3335225 кл. 179-1, 1970.1. US patent number 3335225 Cl. 179-1, 1970. 2.Авторское свидетельство СССР № 453731, кл. G 10 L 1/02, 1972.2. USSR author's certificate number 453731, cl. G 10 L 1/02, 1972.
SU803220663A 1980-12-18 1980-12-18 Method of measuring formant oscillations of speech signals SU964710A1 (en)

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SU964710A1 true SU964710A1 (en) 1982-10-07

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