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. 16, 2010
Filed:
Jul. 13, 2006
James David Johnston, Morristown, NJ (US);
Shyh-shiaw Kuo, Basking Ridge, NJ (US);
James David Johnston, Morristown, NJ (US);
Shyh-Shiaw Kuo, Basking Ridge, NJ (US);
AT&T Intellectual Property II, L.P., New York, NY (US);
Abstract
The MPEG2 Advanced Audio Coder (AAC) standard limits the number of filters used to either one filter for a 'short' block or three filters for a 'long' block. In cases where the need for additional filters is present but the limit of permissible filters has been reached, the remaining frequency spectra are simply not covered by TNS. Two solutions are proposed to deploy TNS filters in order to get the entire spectrum of the signal into TNS. The first method involves a filter bridging technique and complies with the current AAC standard. The second method involves a filter clustering technique. Although the second method is both more efficient and accurate in capturing the temporal structure of the time signal, it is not AAC standard compliant. Thus, a new syntax for packing filter information derived using the second method for transmission to a receiver is also outlined.