Thomas M. Chapman

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Current parametric speech coding schemes can achieve high communications quality speech at bit rates in the range of 2.4 to 1.5kbits/sec. Most schemes sample and quantise, at regular intervals, the “tracks in time” generated by the parameters of the speech production model. As a result, reconstructed “parameter tracks” do not evolve “smoothly” with time.(More)
Efficient reduction of storage and complexity demands in VQ and MQ systems is a key issue when developing new, more powerful compression algorithms. Secondary Storage Quantisation (SSQ) is capable of drastically reducing VQ storage through an efficient representation of codebook elements. Rather than the conventional fixed or floating point representation,(More)
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