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Sampling rate versus quantisation in speech coders
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DOI：10.1016/S0165-1684(96)00170-3.png)
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摘要
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The use of Kalman filtering techniques to reconstruct down-sampled speech signals is investigated. We compare a full-sampled, coarsely quantised speech coding system with a down-sampled, finely quantised speech coding system transmitting at the same bit-rate. Testing reveals that the down-sampled system can outperform the full-sampled system. Sample rate, sample accuracy and decoding delay are traded to achieve improvements at a fixed bit-rate. (C) 1997 Elsevier Science B.V.
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