First International Conference on Spoken Language Processing (ICSLP 90)

Kobe, Japan
November 18-22, 1990

Revised TC-WVQ Speech Coder for Mobile Communication System

Tomoyuki Ohya (1), Hirohito Suda (1), Toshio Miki (1), Shinji Uebayashi (1), Takehiro Moriya (2)

(1) NTT Radio Communication Systems Labs., Yokosuka, Kanagawa, Japan
(2) NTT Human Interface Labs., Midoricho Musashino, Tokyo, Japan

An enhanced version of Transform Coding with a Weighted Vector Quantization (TC-WVQ) speech coder combined with Bit Selective Forward Error Correction (BS-FEC) at 11.2 kbit/s is presented. In this version, speech quality, channel error robustness, computational complexity, and the memory requirements are improved. A real-time operating codec (8.2 MIPS in total) can produce high quality speech in an error free channel. This codec also produces intelligible speech even in a channel of 3% burst error.

Full Paper

Bibliographic reference.  Ohya, Tomoyuki / Suda, Hirohito / Miki, Toshio / Uebayashi, Shinji / Moriya, Takehiro (1990): "Revised TC-WVQ speech coder for mobile communication system", In ICSLP-1990, 125-128.