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Paper Abstract and Keywords
Presentation 2017-03-07 10:15
Improvement of pitch estimation for audio watermarking method using non-negative matrix factorization
Harumi Murata (Chukyo Univ.), Akio Ogihara (Kindai Univ.) EMM2016-100
Abstract (in Japanese) (See Japanese page) 
(in English) For audio signals, the sound quality of stego signal should not deteriorate. With current methods, high sound quality means that the difference between the host and stego signals is small. On the other hand, high sound quality means that the sound quality of stego signal is maintained as music even if another sound, not in the host signal, is perceived in this paper. According to this definition, the watermarks are embedded using non-negative matrix factorization (NMF). NMF is an algorithm that factorizes a non-negative matrix that is an amplitude spectrogram of host signal into two non-negative matrices that corresponds to the spectral patterns of the host signal and the activation of each spectrum. In this paper, we propose a method directed at a duet of different instruments. The activation coefficients which have been separated every instrument are obtained from the amplitude spectrogram of the host signal, and the watermarks can be embedded into the specific instrumental sound of the host signal. In previous work, it is confirmed that watermarks can be embedded into each instrumental sound. However, pitch information varied between embedding and extracting process. Hence, pitch information was known in the extracting process in previous work. Therefore, we improve pitch estimation and want to be extracted watermarks even if pitch information is unknown in the extracting process.
Keyword (in Japanese) (See Japanese page) 
(in English) Audio Watermarking / Non-negative Matrix Factorization / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 501, EMM2016-100, pp. 79-84, March 2017.
Paper # EMM2016-100 
Date of Issue 2017-02-27 (EMM) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
Download PDF EMM2016-100

Conference Information
Committee EMM  
Conference Date 2017-03-06 - 2017-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Miyakojima Marin Terminal Building (Okinawa) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image and Sound Quality, Metrics for Perception and Recognition, Human Auditory and Visual System, etc. 
Paper Information
Registration To EMM 
Conference Code 2017-03-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of pitch estimation for audio watermarking method using non-negative matrix factorization 
Sub Title (in English)  
Keyword(1) Audio Watermarking  
Keyword(2) Non-negative Matrix Factorization  
1st Author's Name Harumi Murata  
1st Author's Affiliation Chukyo University (Chukyo Univ.)
2nd Author's Name Akio Ogihara  
2nd Author's Affiliation Kindai University (Kindai Univ.)
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Date Time 2017-03-07 10:15:00 
Presentation Time 25 
Registration for EMM 
Paper # IEICE-EMM2016-100 
Volume (vol) IEICE-116 
Number (no) no.501 
Page pp.79-84 
#Pages IEICE-6 
Date of Issue IEICE-EMM-2017-02-27 

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