Invention Grant
- Patent Title: Image coding apparatus and image coding method
- Patent Title (中): 图像编码装置和图像编码方法
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Application No.: US11760397Application Date: 2007-06-08
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Publication No.: US08259796B2Publication Date: 2012-09-04
- Inventor: Satoru Kobayashi
- Applicant: Satoru Kobayashi
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Priority: JP2006-174379 20060623
- Main IPC: H04N7/12
- IPC: H04N7/12
Abstract:
An image coding apparatus calculates an image change rate with respect to input image data, predicts an average activity appropriate for a coding target picture that is included in the input image data based on the image change rate, and normalizes an activity using the predicted value of the average activity. Based on the normalized activity, the image coding apparatus performs a quantization of the image data.
Public/Granted literature
- US20070297508A1 IMAGE CODING APPARATUS AND IMAGE CODING METHOD Public/Granted day:2007-12-27
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