Patents by Inventor Per Gunnar Heikkilä

Per Gunnar Heikkilä has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6201960
    Abstract: 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.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: March 13, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Tor Björn Minde, Anders Tomas Uvliden, Per Anders Karlsson, Per Gunnar Heikkilä