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:
Feb. 17, 1998
Filed:
Dec. 21, 1995
Applicant:
Inventor:
Willem Bastiaan Kleijn, Basking Ridge, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L / ; G10L / ; G10L / ;
U.S. Cl.
CPC ...
395-229 ; 395-271 ; 395-228 ;
Abstract
An improved long-term predictor (LTP) for use in analysis-by-synthesis coding systems, such as CELP is disclosed. The invention provides control of the periodicity of speech signals generated by the LTP. This control facilitates a reduction in perceptible noise/buzziness in reconstructed speech. An embodiment of the invention includes a conventional LTP in combination with a two-tap finite impulse response filter. The filter augments operation of the LTP by generating precursor signals of LTP output signals. These precursor signals are combined with the LTP output signals to form the output of the improved LTP.