|Paper title: MODIFIED WIDEBAND SPEECH CODING SYSTEM WITH EMBEDDED G.711 CODERS
Author(s): MILAN TANČIĆ, ZORAN PERIĆ, NIKOLA SIMIĆ,
In this paper, we have proposed a novel model for wideband speech signal coding, structurally similar to G.711.1 coding system.
Unlike G.711.1 coding system, the proposed model has lower complexity that is provided by employing G.711 coders in both
branches after applying transformation coding. This way, signal is not being divided into frames, which leads to substantially
reduced processing delay. Furthermore, special attention is paid to the determination of optimal values of support range for
G.711 coders. System performance is measured by using signal-to-quantization-noise ratio which represents a standard measure
of reconstructed signal quality. Experiments are done for male and female speakers, due to difference in speech signal dynamics.
The obtained results show that the proposed model ensures experimental gain up to 5 dB compared to G. 711 model, whereas
signal processing delay is decreased from 5 ms to 0.25 ms, compared to G. 711.1 standard.
Keywords: G.711 coders, G.711.1 standard, Segmental uniform quantization, Hadamard transform codingYear: 2017 | Tome: 62 | Issue: 3 | Pp.: 299-304
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