Third International Conference on Spoken Language Processing (ICSLP 94)

Yokohama, Japan
September 18-22, 1994

An Algorithm to Reconstruct Wideband Speech from Narrowband Speech Based on Codebook Mapping

Yuki Yoshida, Masanobu Abe

NTT Human Interface Laboratories, Kanagawa, Japan

This paper proposes a new algorithm to reconstruct wideband speech from its narrow version. The algorithm has two novel points. The first is spectrum envelope reconstruction based on codebook mapping. The other is speech signal reconstruction using the reconstructed spectrum envelope. Because the algorithm makes it possible to generate high quality speech without the use of any additional transmitted information, it is applicable for any network, such as the existing telephone network, networks supporting analog and ISDN services, and so on. The algorithm is applied to 20 speakers. Evaluation by the acoustic distance measure and by listening tests confirms the good performance of the algorithm.

Full Paper

Bibliographic reference.  Yoshida, Yuki / Abe, Masanobu (1994): "An algorithm to reconstruct wideband speech from narrowband speech based on codebook mapping", In ICSLP-1994, 1591-1594.