An optical access network system without a power supply using blind speech separation and a loopback technique

Authors:
Takayoshi Tashiro;Shoko Araki;Yasuhiko Nakanishi;Hideaki Kimura;Kiyomi Kumozaki;Masato Miyoshi
Affiliations:
NTT Corporation, Chiba, Japan;NTT Corporation;NTT East Corporation;NTT Corporation, Chiba, Japan;NTT Corporation, Chiba, Japan;NTT Corporation
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 2
Cited 0

Underdetermined blind sparse source separation for arbitrarily arranged multiple sensors

Signal Processing
Blind separation of speech mixtures via time-frequency masking

IEEE Transactions on Signal Processing

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Abstract

This paper proposes an optical access system that enables voice communication services to continue when a power failure occurs. In particular, we propose applying a digital signal processing technique namely blind speech separation (BSS) to an optical multiple access system for demultiplexing randomly mixture signals received from an upstream user. We present a brief overview and the target of proposed system and describe the key technique, namely the BSS procedure. We then report system feasibility studies for the first step of a numerical simulation (assuming two wavelengths and three users) and experimental tests (assuming two wavelengths and two users) using actual sample voice signals. We confirmed that separation was realized by using a subjective assessment that consisted of listening to obtained signals.