Samuli Pietilä

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This paper presents a coding method for successive pitch periods of a speech signal. In the proposed method, a priori knowledge of the statistical properties of successive pitch periods is used by designing a shaped lattice structure that covers the most probable points in the pitch space. We also present briefly a pitch search algorithm for the shaped(More)
In this paper we evaluate the performance of a variety of techniques to improve the parameter analysis in CELP speech coders. These methods include using extended cost horizon in the fixed codebook search process, as well as joint optimization and delayed decision coding of the adaptive and fixed codebook parameters. Based on our simulations for the IS-641(More)
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