IEICE Trans

Naofumi AOKI

Improving the Recognition Accuracy of a Sound Communication System Designed with a Neural Network Kosei OZEKI Naofumi AOKI Saki ANAZAWA Yoshinori DOBASHI Kenichi IKEDA Hiroshi YASUDA
Publication: Publication Date: 2021/11/01 Vol. E104-A No. 11 pp. 1577-1584 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: sound communications, spectrogram, machine learning, neural network,
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Some Evaluations on a Digital Watermarking Technique for Music Data Using Distortion Effect Yuto MATSUNAGA Tetsuya KOJIMA Naofumi AOKI Yoshinori DOBASHI Tsuyoshi YAMAMOTO
Publication: Publication Date: 2019/06/01 Vol. E102-D No. 6 pp. 1119-1125 Type of Manuscript: PAPER Category: Information Network Keyword: digital watermark, sound synthesis, sound effect, distortion effect,
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A Band Extension Technique for Narrow-Band Telephony Speech Based on Full Wave Rectification Naofumi AOKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2010/03/01 Vol. E93-B No. 3 pp. 729-731 Type of Manuscript: LETTER Category: Network Keyword: band extension, telephony speech, full wave rectification,
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A Technique of Lossless Steganography for G.711 Naofumi AOKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/11/01 Vol. E90-B No. 11 pp. 3271-3273 Type of Manuscript: LETTER Category: Network Keyword: steganography, G.711, VoIP,
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A Band Extension Technique for G.711 Speech Using Steganography Naofumi AOKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/06/01 Vol. E89-B No. 6 pp. 1896-1898 Type of Manuscript: LETTER Category: Network Keyword: speech enhancement, band extension, narrow-band speech, wide-band speech, steganography,
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Modification of Two-Side Pitch Waveform Replication Technique for VoIP Packet Loss Concealment Naofumi AOKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/04/01 Vol. E87-B No. 4 pp. 1041-1044 Type of Manuscript: LETTER Category: Network Keyword: VoIP, packet loss concealment, pitch waveform replication, pitch variation,
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A Packet Loss Concealment Technique for VoIP Using Steganography Noriko KOMAKI Naofumi AOKI Tsuyoshi YAMAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/08/01 Vol. E86-A No. 8 pp. 2069-2072 Type of Manuscript: Special Section LETTER (Special Section on Digital Signal Processing) Category: Keyword: VoIP, packet loss concealment, pitch waveform replication, steganography,
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A Fragile Digital Watermarking Technique by Number Theoretic Transform Hideaki TAMORI Naofumi AOKI Tsuyoshi YAMAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2002/08/01 Vol. E85-A No. 8 pp. 1902-1904 Type of Manuscript: Special Section LETTER (Special Section on Digital Signal Processing) Category: Image/Visual Signal Processing Keyword: digital watermarking, detecting alterations, discrete Fourier transform (DFT), number theoretic transform,
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High Quality Speech Synthesis Based on the Reproduction of the Randomness in Speech Signals Naofumi AOKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/09/01 Vol. E84-A No. 9 pp. 2198-2206 Type of Manuscript: Special Section PAPER (Special Section on Nonlinear Theory and its Applications) Category: Image & Signal Processing Keyword: rule-based speech synthesis, wavelet transform, mixed excitation scheme, random fractal fluctuation,
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Fractal Modeling of Fluctuations in the Steady Part of Sustained Vowels for High Quality Speech Synthesis Naofumi AOKI Tohru IFUKUBE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/09/25 Vol. E81-A No. 9 pp. 1803-1810 Type of Manuscript: Special Section PAPER (Special Section on Nonlinear Theory and Its Applications) Category: Chaos, Bifurcation and Fractal Keyword: naturalness of sustained vowels, speech synthesis, random fractal, 1/f^β fluctuation,
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