UDC 621.395
DEVELOPMENT OF MULTICHANNEL SYSTEM BASED ON THE MODIFICATION OF THE KHURGIN – YAKOVLEV ALGORITHM USING SIGNAL SAMPLES AND ITS FIRST THREE DERIVATIVES
V. T. Dmitriev, Dr. Sc. (Tech.), Radio Control and Communication Department, Head of department, RSREU, Ryazan, Russia;
orcid.org/0000-0001-5521-6886, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vu Hoang Son, post-graduate student RSREU, Ryazan, Russia;
orcid.org/0009-0004-7428-5296, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A modification of the Khurgin-Yakolev algorithm for four-channel implementation, based on speech sig nal representation in the form of downsampled samples of a signal and its first three orders of derivatives is proposed and investigated. The possibilities of parallel processing of signal samples are demonstrated, and an evaluation of system error resilience created on the basis of the proposed algorithm is performed. A com 35 parison of error resilience of the transmission system based on the modification of the Khurgin-Yakolev al gorithm using signal samples and its first three orders of derivatives with a system built on the basis of Ko telnikov's theorem is carried out. Experimental studies of primary speech signal coding algorithms based on the proposed algorithm with different numbers of channels are conducted. Compared to the systems based on Kotelnikov's theorem, the authors show that the gain in restored speech signal quality in the presence of noise in transmission channel with bit error probability from 0,1 to 5 % amounts from 0,2 to 1,4 points ac cording to Mean Opinion Score (MOS) scale for low-rate coding algorithms, from 0,2 to 1,8 points for me dium-rate codecs, and up to 1,6 points for high-rate coding algorithms.
Key words: : modification of the Khurgin – Yakovlev algorithm, sampling theorem, speech signal pro cessing, primary codecs, communication channels, filters, objective speech quality, ViSQOL.