Invention Grant
- Patent Title: Method and device for coding and decoding
- Patent Title (中): 用于编码和解码的方法和设备
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Application No.: US11661265Application Date: 2005-07-29
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Publication No.: US08290058B2Publication Date: 2012-10-16
- Inventor: Peter Amon , Andreas Hutter , Benoit Timmermann
- Applicant: Peter Amon , Andreas Hutter , Benoit Timmermann
- Applicant Address: DE Munich
- Assignee: Siemens Aktiengesellschaft
- Current Assignee: Siemens Aktiengesellschaft
- Current Assignee Address: DE Munich
- Agency: Staas & Halsey LLP
- Priority: DE102004041664 20040827
- International Application: PCT/EP2005/053709 WO 20050729
- International Announcement: WO2006/024584 WO 20060309
- Main IPC: H04B1/66
- IPC: H04B1/66

Abstract:
In video coding image sequences, images are coded in a scaled manner to obtain video data which represents the image in multiple steps from a defined image resolution or image quality (e.g., according to the data rate), and the resolution is defined by the number of image pixels of each represented image. Coding is block-based, i.e., for a description of an approximate movement of parts of one of the images in the image sequence, at least one block structure is produced describing the movement. The block structure produced includes a block divided into partial blocks which are in turn divided into sub-blocks. A first block structure is produced temporally for at least one first resolution level and a second block structure is produced for a second resolution level. The first resolution level has a lower image pixel number and/or image quality than the second resolution level. The second block structure is compared to the first block structure such that differences in the block structure are determined, such that on the base of the properties of the structure differences, a modified second block structure is produced. The structure thereof represents one part of the second block structure. Subsequently, the modified block structure and the second block structure are compared based on at least one value which is proportional to the quality of the image and the block structure and the value thereof is directly proportional to an improved quality based on the coding of the bit sequence.
Public/Granted literature
- US20080095241A1 Method And Device For Coding And Decoding Public/Granted day:2008-04-24
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