tuzsutТруды учебных заведений связиProceedings of Telecommunication Universities1813-324X2712-8830СПбГУТ10.31854/1813-324X-2019-5-2-102-107tuzsut-77Research ArticleИНФОРМАТИКА, ВЫЧИСЛИТЕЛЬНАЯ ТЕХНИКА И УПРАВЛЕНИЕINFORMATICS, COMPUTER ENGINEERING AND MANAGEMENTОБНАРУЖЕНИЕ АУДИОСТЕГОСИГНАЛА С ВЛОЖЕНИЕМ ИНФОРМАЦИИ ПРИ ПОМОЩИ МОДУЛИРУЕМОЙ РЕВЕРБЕРАЦИИDetecting of Audio Stegosystems with Information Embedding Based on Modulated ReverberationАлексеевВ. Г.AlekseevV. ..noemail@neicon.ruКоржикВ. И.KorzhikV. ..val-korzhik@yandex.ruООО «Орион»РоссияOrion LTDRussian FederationСанкт-Петербургский государственный университет телекоммуникаций им. проф. М.А. Бонч-БруевичаРоссияThe Bonch-Bruevich Saint-Petersburg State University of TelecommunicationsRussian Federation20191304202152102107Copyright © Алексеев В.Г., Коржик В.И., 20212021Алексеев В.Г., Коржик В.И.Alekseev V..., Korzhik V...This work is licensed under a Creative Commons Attribution 4.0 License.https://tuzs.sut.ru/jour/article/view/77

Рассматривается аудиосигнал с вложением информации при помощи модуляции времени задержки реверберации. Хотя стегосистема такого вида обычно может использоваться для вложения цифровых водяных знаков, обеспечивающих защиту прав собственников аудиопродукции, но в некоторых случаях может представлять интерес обнаружение самого факта погружения дополнительной информации - то есть стегоанализ.В работе показывается, что слуховое обнаружение, а также обнаружение по виду аудиосигнала оказывается невозможным при малых амплитудах вложения. Поэтому предлагается новый метод обнаружения, основанный на специфике реверберационной модуляции. Исследуется эффективность данного метода в обычных терминах стегоанализа (вероятность пропуска и ложного обнаружения стегосигнала).

Audio signal with embedding of information based on modulated reverberation is considered. The goal of such stegosystem commonly is to provide a copy right protection by digital watermarking but sometimes may be interesting also to detect a fact of hidden signal presence by means of steganalysis. Detecting of such stegosystems occurs impossibly when it is executed either by a listening of audio signal or by a observation of signal wave form if deph of embedding is very small. Therefore we propose a new detection algorithm based on properties of modulated reverberation. A performance evaluation of such algorithm is investigated by simulation in terms of the probability of missimg and the probability of false alarm.

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The authors declare that there are no conflicts of interest present.