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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2022-6-60-66</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1616</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АКУСТИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ACOUSTIC MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Адаптивный метод измерения частоты основного тона с использованием двухуровневой авторегрессионной модели речевого сигнала</article-title><trans-title-group xml:lang="en"><trans-title>An adaptive method for measuring the pitch frequency using a two-level autoregressive of a speech signal</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6196-0564</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савченко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Savchenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Владимирович Савченко</p><p>Нижний Новгород</p></bio><bio xml:lang="en"><p>Andrey V. Savchenko</p><p>Nizhniy Novgorod</p></bio><email xlink:type="simple">avsavchenko@hse.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3045-3337</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савченко</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Savchenko</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Васильевич Савченко</p><p>Нижний Новгород</p></bio><bio xml:lang="en"><p>Vladimir V. Savchenko</p><p>Nizhniy Novgorod</p></bio><email xlink:type="simple">vvsavchenko@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский университет «Высшая школа экономики»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research University Higher School of Economics</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Нижегородский государственный лингвистический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Nizhny Novgorod State Linguistic University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>13</day><month>05</month><year>2023</year></pub-date><volume>0</volume><issue>6</issue><fpage>60</fpage><lpage>66</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1616">https://www.izmt.ru/jour/article/view/1616</self-uri><abstract><p>Рассмотрена задача определения частоты основного тона речевого сигнала в условиях действия белого гауссова шума. Предложен метод измерений данной частоты, который учитывает периодическую структуру спектра мощности вокализованных фреймов речи и основан на принципе накопления энергии гармоник в частотной области. Для этого в алгоритм обработки речевого сигнала введена процедура выравнивания огибающей спектра мощности с использованием двухуровневой авторегрессионной модели наблюдений: в пределах одного периода основного тона и в интервале нескольких таких периодов. При этом предусмотрена адаптация порядка авторегрессии нижнего уровня под наблюдаемый фрейм. Рассмотрен пример практической реализации адаптивного метода на базе метода Берга. Основные достоинства адаптивного метода по сравнению с известными аналогами – высокое быстродействие и повышенная помехоустойчивость – подтверждены результатами проведённого натурного эксперимента. В результате применения адаптивного метода получен выигрыш в пороговых сигналах 5–10 дБ.</p></abstract><trans-abstract xml:lang="en"><p>The problem of determining the fundamental frequency of a speech signal in the presence of white Gaussian noise is considered. A new method for its measurement is proposed, which takes into account the periodic structure of the power spectrum of voiced speech frames and is based on the principle of harmonic energy accumulation in the frequency domain. For this purpose, a procedure for equalizing its spectral envelope was introduced into the speech signal processing algorithm using a two-level autoregressive observations model: within one and several periods of the fundamental tone. At the same time, the adaptation of the order of auto regression of the lower level to the observed frame is implemented. An example of the practical implementation of the adaptive method based on the Berg method is considered. With the use of author's software, an experiment was set up and carried out, and experimental estimates of the effectiveness of the new method were obtained. It is shown that, due to its adaptation, a gain in threshold signals of 5–10 dB is achieved.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>акустика речи</kwd><kwd>речевой сигнал</kwd><kwd>акустические измерения</kwd><kwd>авторегрессионная модель</kwd><kwd>проблема априорной неопределенности</kwd><kwd>адаптивный подход</kwd></kwd-group><kwd-group xml:lang="en"><kwd>speech acoustics</kwd><kwd>voice signal</kwd><kwd>acoustic measurements</kwd><kwd>autoregressive model</kwd><kwd>a priori uncertainty</kwd><kwd>adaptive approach</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Российского научного фонда (проект № 20-71-10010).</funding-statement><funding-statement xml:lang="en">the work is supported by RSF (Russian Science Foundation) grant no. 20-71-10010.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Rabiner L. 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