A multi-band CELP wideband speech coder
نویسندگان
چکیده
A novel low-delay wideband speech coder, called Multiband CELP (MB-CELP), overcomes the major obstacles usually associated with two traditional CELP approaches to wideband speech coding namely fullband CELP and split-band CELP. The new MB-CELP coder employs a multi-band bank of o -line ltered excitation codebooks, fullband linear prediction synthesis, and minimization of the error between original and synthesized speech signal over the full frequency range. A 16 kbps version of MB-CELP coder with two equal bands, is described in this paper. Subjective comparison test results show that this coder performs better than the G.722 coder at the bit-rate of 48 kbps.
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