Optimization of segmental parameters companding the sound signal

Popov Oleg Borisovich, Chernysheva Tatiana Vasilievna, Kuznetsov Peter Gennadievich, Makarina Diana Aleksandrovna

Existing systems for companding the dynamic range of an audio signal, necessary for its transmission over transmission channels, introduce significant distortions into the signal. At the Department of Television and Sound Broadcasting of the Moscow Technical University of Communications and Informatics, an algorithm for a compander system that does not distort the signal shape has been developed. For the correct operation of the algorithm, it is necessary to determine the optimal control parameters: the duration of the segments depending on the genre of sound; gain in signal-to-noise ratio; bit depth of the expander control signal. The determination of the optimal values of these parameters is given below.

Keywords:segment, gain, window function, dynamic range, signal-to-noise ratio, distortion, bit depth.