VERFAHREN ZUR SYNTHESE VON KOMFORTGERÄUSCH-RAHMEN

摘要

A method of synthesizing Comfort Noise Frames for generating background noise frames in a receiver terminal during the periods of silence of an emitter terminal is described, and in virtue of receiving a slot whose first half includes a CNF command and whose other half includes the noise parameterization. The invention develops an algorithm for synthesizing the frames, which includes strategies for randomizing the algebraic indices contained in the frames, pitch gain cancellation, and interpolation of the LSP parameters and of the linear energy of the CNF frame of the current and previous periods.