RESEARCH OF DISTORTIONS OF THE ENERGY PARAMETERS OF AUDIO BROADCASTING SIGNALS BY THE METHOD OF COMPLEX STATISTICAL ESTIMATION

Popov Oleg Borisovich, Chernysheva Tatiana Vasilyevna, Abramov Valentin Alexandrovich, Borisov Andrey Alekseevich

It has been shown that passing an audio signal through the links of a transmission path, in which parameters and volume of the signal are transformed, can result in emotional degradation of the sound of informational messages. In addition, the transmission path may introduce an emotional content into the sound information that was not present initially. The quality and completeness of transmission of the audio signal is well evaluated by the nature of changes in its energy parameters. It has been found that objective evaluations of the quality of transmission of these signals in communication channels, which have a strong correlation with subjective evaluations of these signals, can be obtained based on the analysis of the most significant statistical parameters of broadcasting signals. A methodology has been proposed to combine an objective assessment of the sound signal with the results of subjective-statistical measurements, which involves using complex statistical evaluation of the energy parameters of the signal. Such an approach to evaluating the quality of transmission of informational audio signals proves to be quite effective in conditions of various interferences and distortions that operate in transmission channels. Meanwhile, other objective methods of evaluation formed without the involvement of a perceiving human, may prove to be less efficient. An experimental study was conducted on the dependence of changes in statistical parameters of relative mean power of sound signals as they are subjected to various types of distortions and interferences. The study results showed a high correlation between changes in the parameters of relative mean power of signals and their subjective perceptibility. The originality of this research is protected by registered programs and patents as well as various articles in journals. By using the results of this research, it is possible to improve the quality of broadcasting signals and informational programs, as well as to more effectively control and regulate sound broadcasting equipment, thereby increasing the popularity ratings of broadcasting stations and their economic efficiency.

Keywords:adaptive sound broadcasting channels, objective and subjective estimation of transmission quality, relative average power complex statistical estimation