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Trellis-searched adaptive predictive coding of speech

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2 Author(s)
Malone, K.T. ; Sandia Nat. Lab., Albuquerque, NM, USA ; Fischer, T.R.

Trellis coded vector quantization (TCVQ) and forward adaptive predictive coding (APC) are used to form an efficient speech coding system operating at bit rates of 16 and 9.6 kb/s. The effectiveness of the system is studied for a variety of system parameters and utterances. Simulation results indicate that segmental signal-to-noise ratios as high as 23.8 and 15.4 dB are obtainable at 16 and 9.6 kb/s respectively. The quality of the reconstructed speech is deemed to be excellent at 16 kb/s and very good at 9.6 kb/s. An algorithm for optimizing the residual codebooks is presented

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Speech and Audio Processing, IEEE Transactions on  (Volume:1 ,  Issue: 2 )