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. 23, 2010
Filed:
Mar. 31, 2004
Tian Wang, Redmond, WA (US);
Hosam A. Khalil, Redmond, WA (US);
Kazuhito Koishida, Redmond, WA (US);
Wei-ge Chen, Issaquah, WA (US);
Mu Han, Redmond, WA (US);
Tian Wang, Redmond, WA (US);
Hosam A. Khalil, Redmond, WA (US);
Kazuhito Koishida, Redmond, WA (US);
Wei-Ge Chen, Issaquah, WA (US);
Mu Han, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Various strategies for rate/quality control and loss resiliency in an audio codec are described. The various strategies can be used in combination or independently. For example, a real-time speech codec uses intra frame coding/decoding, adaptive multi-mode forward error correction ['FEC'], and rate/quality control techniques. Intra frames help a decoder recover quickly from packet losses, while compression efficiency is still emphasized with predicted frames. Various strategies for inserting intra frames and signaling intra/predicted frames are described. With the adaptive multi-mode FEC, an encoder adaptively selects between multiple modes to efficiently and quickly provide a level of FEC that takes into account the bandwidth currently available for FEC. The FEC information itself may be predictively encoded and decoded relative to primary encoded information. Various rate/quality and FEC control strategies allow additional adaptation to available bandwidth and network conditions.