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:
Oct. 23, 2007
Filed:
Jul. 20, 2004
Allen Gersho, Santa Barbara, CA (US);
Vladimir Cuperman, Goleta, CA (US);
Tian Wang, Goleta, CA (US);
Kazuhito Koishida, Goleta, CA (US);
Allen Gersho, Santa Barbara, CA (US);
Vladimir Cuperman, Goleta, CA (US);
Tian Wang, Goleta, CA (US);
Kazuhito Koishida, Goleta, CA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
An enhanced low-bit rate parametric voice coder that groups a number of frames from an underlying frame-based vocoder, such as MELP, into a superframe structure. Parameters are extracted from the group of underlying frames and quantized into the superframe which allows the bit rate of the underlying coding to be reduced without increasing the distortion. The speech data coded in the superframe structure can then be directly synthesized to speech or may be transcoded to a format so that an underlying frame-based vocoder performs the synthesis. The superframe structure includes additional error detection and correction data to reduce the distortion caused by the communication of bit errors.