A method and circuit arrangement for determining a quality information points on the transmission quality of a voice signal in a digital transmission system

摘要

In digital transmission systems, such as, for example, in mobile radio systems, the speech quality combines the. In order to improve the speech quality are error masking measures are taken, the effectiveness of the accuracy of the quality information points of the channel transmission quality is determined. According to the invention, known quality information and transforms combined in a manner that they are suitable for the error masking measures are suitable as a reliable input parameters. By taking account of the bath frame indicator bfi in the selection of the transformation rules different transformation rules can be adapted to the respective transmission conditions. The method is simple to produce, if, in an upstream - channel, a transformation unit (4) between a channel decoder (1) and an error masking unit (2) is inserted.