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In this paper, a new approach to a finite impulse response (FIR) closed form design of the digital fractional forward filter is presented. The design is based on the approximation of the fractional order systems. First, closed form digital infinite impulse response (IIR) fractional forward filter implementation has been derived from the analog rational function approximation, in a given frequency...
This paper presents a repetition based packet lost concealment (PLC) method for code excited linear prediction (CELP) based coders in packet networks. We perform a repetition of parameters of the last good frame to construct the missing of corrupted packet. Our approach consists in adding a muting factor, a random Jittering and bandwidth expansion. We applied this scheme to the standard ITU-T G729...
In this paper, we propose a method for packet loss concealment (PLC) based on time scale modification for code excited linear prediction (CELP) based coders in packet network. We perform a time scale modification (TSM) using a waveform similarity overlap-add (WSOLA) technique which is an interpolation-based method operating entirely in the time domain, to reconstruct the excitation signal of the lost...
In many speech coding systems, the LPC coefficients are transformed to the line spectrum pairs (LSP) parameters which are very effective representation for quantization of the LPC information. LSP representation consumes a large part of the total bit rate of the coder. Typically, the LSP are highly correlated from one frame to the next one, and a considerable reduction in bit rate can be achieved...
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