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:
Sep. 24, 2013
Filed:
May. 18, 2011
Paul Johan Hsieh, San Jose, CA (US);
Denis Sergeyevich Shchepetov, Sunnyvale, CA (US);
Sridhar Sankuratri, Campbell, CA (US);
Damien Gerard Saint Macary, Sunnyvale, CA (US);
Paul Johan Hsieh, San Jose, CA (US);
Denis Sergeyevich Shchepetov, Sunnyvale, CA (US);
Sridhar Sankuratri, Campbell, CA (US);
Damien Gerard Saint Macary, Sunnyvale, CA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
An invention is disclosed for performing differencing of graphical data in post-transform space for a remote presentation session. Graphical data is transformed from a first representation to a second representation (e.g. with a DWT), and then a difference is taken of the post-transform data and the post-transform data of the frame that preceded the current frame. This difference is then encoded and transmitted to a client, which decodes it, and creates a representation of the graphical data using the delta, and a previously determined representation of the previous frame. By performing differencing in post-transform space, fidelity of the remote presentation session is retained while it may decrease bandwidth. This may occur because the entropy of the delta representation is usually lower than a non-delta representation while the scheme retains the identical data of the final decoded image of the non-delta version of the same compression scheme.