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:
Dec. 21, 2010
Filed:
Nov. 14, 2003
Vikrant Kasarabada, Mountain View, CA (US);
Vaidyanath Mani, Sunnyvale, CA (US);
Haitao Guo, San Jose, CA (US);
Vikrant Kasarabada, Mountain View, CA (US);
Vaidyanath Mani, Sunnyvale, CA (US);
Haitao Guo, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A video encoder identifies scene changes during the encoding of video sequences based on the distribution of macroblock types within each image. Once an image is identified as a scene change, control information is sent to a quantizer to adjust the quantization of the image to improve image quality. The image quantization is improved without changing the frame or picture type of the image within its group of pictures. To improve the image quality, the quantizer can directly or indirectly change the quantization parameter used to quantize the DCT coefficients for the image.