Title :
A real-time implementation of the improved MBE speech coder
Author :
Brandstein, Michael S. ; Monta, Peter A. ; Hardwick, John C. ; Lim, Jae S.
Author_Institution :
Res. Lab. of Electron., MIT, Cambridge, MA, USA
Abstract :
A real-time, single digital signal processing (DSP) chip implementation of a 2.4-, 4.8-, and 8.0-kb/s improved multiband excitation (IMBE) vocoder is presented. The IMBE vocoder is based on the MBE speech model, and it is shown to generate high-quality speech under both clean and noisy conditions. In addition, the IMBE vocoder is well suited for real-time implementation since it does not require excessive computation or storage. Full-duplex operation is demonstrated using a single AT&T WE DSP 32. Aspects of the hardware architecture, algorithm implementation, and system performance are addressed
Keywords :
digital signal processing chips; encoding; security of data; speech analysis and processing; speech synthesis; vocoders; 2.4 to 8.0 kbit/s; AT&T WE DSP 32; IMBE vocoder; MBE speech coder; algorithm implementation; full duplex operation; hardware architecture; high quality speech generation; low bit rate speech coding; multiband excitation vocoder; real-time implementation; single DSP chip; speech encoding; system performance; Acoustic noise; Bit rate; Computer architecture; Digital signal processing; Digital signal processing chips; Frequency; Hardware; Noise generators; Signal processing algorithms; Speech; Speech analysis; Speech coding; Speech enhancement; Speech synthesis; System performance; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115523
