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:
Jan. 27, 2009
Filed:
Mar. 01, 2001
Jani Rotola-pukkila, Tampere, FI;
Janne Vainio, Lempäälä, FI;
Hannu Mikkola, Tampere, FI;
Nokia Corporation, Espoo, FI;
Abstract
A speech decoder comprises a decoder () for converting a linear prediction encoded speech signal into a first sample stream having a first sampling rate and representing a first frequency band. Additionally it comprises a vocoder () for converting an input signal into a second sample stream having a second sampling rate and representing a second frequency band, and combination means () for combining the first and second sample streams in processed form. It comprises also means () for generating a second linear prediction filter, to be used by the vocoder () on the second frequency band, on the basis of a first linear prediction filter used by the decoder () on the first frequency band. Extrapolation through an infinite impulse response filter is the preferable method of generating the second linear prediction filter.