The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2009
Filed:
Apr. 10, 2006
Jari Mäkinen, Tampere, FI;
Hannu Mikkola, Tampere, FI;
Janne Vainio, Pirkkala, FI;
Jani Rotola-pukkila, Kangasala, FI;
Jari Mäkinen, Tampere, FI;
Hannu Mikkola, Tampere, FI;
Janne Vainio, Pirkkala, FI;
Jani Rotola-Pukkila, Kangasala, FI;
Nokia Corporation, Espoo, FI;
Abstract
A method for use by a speech decoder in handling bad frames received over a communications channel a method in which the effects of bad frames are concealed by replacing the values of the spectral parameters of the bad frames (a bad frame being either a corrupted frame or a lost frame) with values based on an at least partly adaptive mean of recently received good frames, but in case of a corrupted frame (as opposed to a lost frame), using the bad frame itself if the bad frame meets a predetermined criterion. The aim of concealment is to find the most suitable parameters for the bad frame so that subjective quality of the synthesized speech is as high as possible.