Telefonaktiebolaget Lm Ericsson (Publ)

Per Gunnar Heikkil&auml;

Anders Tomas Uvliden

Tor Bj&ouml;rn Minde

Per Anders Karlsson

An improved method and system of measuring the perceived speech quality in mobile telecommunications networks is disclosed herein. In an embodiment of the invention, the method uses both radio link parameters and an objective measuring technique performed on received signals to estimate the speech quality perceived by the end-user. A radio link processing stage extracts temporal information from a set of available radio link parameters such as the BER, FER, RxLev, handover statistics, soft information, and speech energy. Concurrently, a speech processing stage is used to process a sequence of original signals and received signals, obtained from the output of a telecommunications system. The signal sequences are processed by an objective measuring technique such as Perceptual Speech Quality Measure (PSQM). The outputs from the radio link processing and speech processing stages are utilized to calculate an estimate for speech quality. Furthermore, a weight may be given to radio link processing and speech processing in accordance with their performance under various conditions such that the overall speech quality is calculated with respect to the best approach.

Growing community of inventors

Luleå, Sweden

Per Gunnar Heikkilä

Growing community of inventors

Luleå, Sweden

Per Gunnar Heikkil&auml;

Per Gunnar Heikkilä