UDC 621.395
APPLICATION OF THREE-CHANNEL MODIFICATION OF THE KHURGIN – YAKOVLEV ALGORITHM IN THE ALGORITHMS FOR PRIMARY CODING OF SPEECH SIGNALS
V. T. Dmitriev, Doctor in Technical Sciences, department of radio control and communication, Head of the 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.
Research on modifying the Khurgin-Yakovlev algorithm with three-channel implementation to improve the quality in speech signals primary codecs has been carried out. The aim of the work is to modify amplitude-frequency and phase-frequency characteristics of synthesis filters in order to simplify the implementation and minimize signal reconstruction error, as well as to study primary codecs that use the proposed modification when exposed to interference in a communication channel. A block diagram of three-channel system for processing and transmitting speech signals has been developed based on a modification of the KhurginYakovlev algorithm. Estimates of reconstructed speech signal quality at the output of various codecs under the influence of interference in a communication channel were obtained for the proposed modification of the Khurgin – Yakovlev algorithm, and were compared with the systems built on the theorem of V.A. Kotelnikov. The authors show that the application of the proposed three-channel modification of the Khurgin-Yakovlev algorithm improves quality characteristics and noise immunity of transmitted speech information.
Key words: :modification of the Khurgin-Yakovlev algorithm, theorem of V.A. Kotelnikov, primary coding, speech signal codecs, noise immunity, noise in communication channel, speech quality assessmen