Forming the Frequency Response Assessment of the Audio Transmission Channel Based on the Real Signal

Abstract

The frequency response (FR) of the audio broadcasting channel is formed, as a rule, using a test sinusoidal signal. In the process of transmission via modern adaptive channels, the real sound broadcasting signal (SBS) is subjected to compact representation, audio processing and radiation using acoustic systems. All these procedures significantly change the FR of the signal, but retain subjectively comparatively high transmission quality. The original methods of spectral analysis developed by the authors made it possible to bring their accuracy and resolution closer to the previously unattainable capabilities of the human auditory analyzer. This, in turn, makes it possible to provide the ability to form and control the FR directly in the process of transmitting the audio program for all devices included in the channel.

Keywords

• discrete fourier transform
• fast fourier transform
• discrete cosine transform
• transformation coefficients
• peak factor
• spectrum transposition
• subjective statistical expertise
• filtering.