Publications – Details
Artificial Bandwidth Extension of Speech Supported by Watermark-Transmitted Side Information
- Authors:
- Bernd Geiser, Peter Jax, and Peter Vary
- Book Title:
- Proceedings of European Conference on Speech Communication and Technology (INTERSPEECH)
- Venue:
- Lisbon, Portugal
- Date:
- Sept. 2005
- Pages:
- 1497–1500
- Language:
- English
Abstract
In recent years research the area of artificial bandwidth extension (BWE) of speech signals has made significant progress. The intention of BWE is to produce wideband speech with a cut-off frequency of for instance 7 kHz from a narrowband version (e.g., with telephone bandwidth, i.e., 300Hz − 3.4 kHz). The respective algorithms are based on the estimation of parameters of a source model for speech production given the knowledge of the narrowband signal. A theoretical performance bound on this estimation has been formulated in [1]. In order to overcome this boundary we propose the transmission of (compact) side information which can support the parameter estimation. Since a common additional channel would conflict with the requirement of backwards compatibility in narrowband communication systems, the side information is embedded as digital watermark into the narrowband speech.
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