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:
Jan. 09, 2007
Filed:
May. 29, 2001
Fang Wu, San Jose, CA (US);
KE Shen, Sunnyvale, CA (US);
Yi Tong Tse, San Jose, CA (US);
Sangeeta Ramakrishnan, San Jose, CA (US);
Fang Wu, San Jose, CA (US);
Ke Shen, Sunnyvale, CA (US);
Yi Tong Tse, San Jose, CA (US);
Sangeeta Ramakrishnan, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
According to the present invention, methods and apparatus for filtering transform coefficients are provided. Transform coefficients associated with an input bit sequence can be zeroed to provide modified transform coefficients associated with an output bit sequence. The transform coefficients may represent information in a portion of data such as a video frame, a picture, or an audio stream. In one example, the transform coefficients are DCT coefficients of an MPEG-2 video sequence. The transform coefficients are filtered to provide modified transform coefficients associated with an output bit sequence. The output bit sequence is a rescaled version of the input bit sequence.