Security enhancement for AES encrypted speech in communicationsInternational Journal of Speech Technology - Tập 20 - Trang 163-169 - 2017
Emad Mossa
This paper introduces a secure speech communication approach, which is based on encryption and authentication. This system is based on Advanced Encryption Standard (AES) for encryption and private image database for enhancement of encryption and for authentication. The idea of this cryptosystem is based on XOR of one image from image database with the clear speech before encryption and embedding t...... hiện toàn bộ
An efficient iterative method for nearly perfect reconstruction non-uniform filter bankInternational Journal of Speech Technology - Tập 16 - Trang 261-272 - 2012
S. Anurag, A. Kumar, G. K. Singh
In this paper, a computationally efficient iterative algorithm is presented for the design of multi-channel nearly perfect reconstruction nonuniform filter bank using the modified window functions such as Kaiser, Cosh and Exponential windows with exploiting a new perfect reconstruction condition of nonuniform filter banks instead of using complex objective functions. The cutoff frequency is optimi...... hiện toàn bộ
Phonetic segmentation using multiple speech featuresInternational Journal of Speech Technology - Tập 11 - Trang 73-85 - 2009
Iosif Mporas, Todor Ganchev, Nikos Fakotakis
In this paper we propose a method for improving the performance of the segmentation of speech waveforms to phonetic units. The proposed method is based on the well known Viterbi time-alignment algorithm and utilizes the phonetic boundary predictions from multiple speech parameterization techniques. Specifically, we utilize the most appropriate, with respect to boundary type, phone transition posit...... hiện toàn bộ
Car Speech Enhancement Using a Microphone ArrayInternational Journal of Speech Technology - Tập 8 - Trang 79-91 - 2005
Jen-Tzung Chien, Po-Yin Lai
This paper proposes a speech enhancement approach to suppress the interference of car noise. A linear microphone array is adopted for far-talking speech acquisition and delay-and-sum beamforming noise reduction. We present an effective time delay estimator using the coherence function between the reference microphone and the beamformed speech. To further enhance the beamformed speech, we exploit a...... hiện toàn bộ
Automatic Segmentation of Continuous Speech on Word Level Based on Supra-segmental FeaturesInternational Journal of Speech Technology - Tập 8 - Trang 363-370 - 2005
Klára Vicsi, György Szaszák
This article presents a cross-lingual study for Hungarian and Finnish about the segmentation of continuous speech on word and phrasal level by examination of supra-segmental parameters. A word level segmentationer has been developed which can indicate the word boundaries with acceptable precision for both languages. The ultimate aim is to increase the robustness of speech recognition on the langua...... hiện toàn bộ