Assessment of Changes in the Rise and Fall of the Audio Broadcasting Signal in the Transmission Channel

Abstract

The change in the slope of the rise and fall of the audio broadcast signal is particularly noticeable to the listener. The slope of the rise determines the method of sound extraction, the recognizability of the musical signal, and the clarity of speech. Changes in the process of rise are noticeable to the listener in durations of just fractions of a millisecond. The process of the fall of the audio signal is mainly determined by the properties of the room in which it is recorded, such as reverberation. Changes in the process of fall affect the emotional color of the signal and are also very significant for the listener. Assessing the changes in the processes of rise and fall of the signal during its processing, coding, and transmission over the communication channel was difficult due to the lack of an objective evaluation method, which is proposed in the article.

Keywords

• audio processor
• audio broadcasting signal
• adaptive channel
• discrete fourier transform
• complex representation of the signal
• analytical envelope.