Title :
A 2400 bps multi-band excitation vocoder
Author_Institution :
Sanders Associates Inc., Nashua, NH, USA
Abstract :
A 2400-b/s (bit/s) multiband excitation (MBE) vocoder that attains a diagnostic rhyme test (DRT) score of 90.1 on clean speech is presented. At high signal-to-noise ratios (SNRs), this vocoder exhibits audio quality comparable to that of the 8000-bit/s MBE vocoder. At lower SNRs, e.g. 0 to 10 dB, the subjective quality of the 2400-b/s vocoder diminishes somewhat in comparison to that of other MBE vocoders; however, intelligibility remains comparable. Spectral envelope magnitude interpolation and quantization are discussed
Keywords :
encoding; speech analysis and processing; speech intelligibility; vocoders; 0 to 10 dB; 2400 bit/s; 8000 bit/s; DRT; MBE vocoders; diagnostic rhyme test; intelligibility; multi-band excitation vocoder; signal-to-noise ratios; spectral envelope magnitude interpolation; speech encoding; subjective quality; Bit rate; Frequency synthesizers; Interpolation; Phase noise; Quantization; Sampling methods; Signal to noise ratio; Speech; Speech enhancement; Speech synthesis; Testing; Vector quantization; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115524
