Third International Conference on Spoken Language Processing (ICSLP 94)

Yokohama, Japan
September 18-22, 1994

Quality Enhancement of Band Limited Speech by Filtering and Multirate Techniques

Hiroshi Yasukawa

NTT Transmission Systems Laboratories, Kanagawa, Japan

This paper describes the quality enhancement of band limited speech signals. In speech transmission the quality of the received speech signals is degraded by severe band limitation. We propose a spectrum widening method that utilizes aliasing effects in sampling rate conversion and digital filtering for spectrum shaping. Implementation procedures are clarified, and its performance is discussed. Furthermore, a subjective evaluation is obtained. It is shown that the proposed method effectively enhances speech quality.

Full Paper

Bibliographic reference.  Yasukawa, Hiroshi (1994): "Quality enhancement of band limited speech by filtering and multirate techniques", In ICSLP-1994, 1607-1610.