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Method and device for encoding three-dimensional grid with quality scalability based on graded quantification

A technology of three-dimensional grid and coding method, which is applied in the field of video coding and decoding, and can solve problems such as the influence of bit plane complexity

Active Publication Date: 2012-06-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bit-plane approach has an inherent disadvantage: small changes in the residual to be encoded can have a noticeable impact on the complexity of the bit-plane
The iterative method can effectively encode the efficiency, but the maximum error of the grid will not decrease significantly until the last iteration is completed

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  • Method and device for encoding three-dimensional grid with quality scalability based on graded quantification
  • Method and device for encoding three-dimensional grid with quality scalability based on graded quantification
  • Method and device for encoding three-dimensional grid with quality scalability based on graded quantification

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Embodiment Construction

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0019] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention provides a method for encoding three-dimensional grid with quality scalability based on graded quantification. The method comprises the following steps of: acquiring a plurality of grids with different resolutions according to an original grid, and taking the grid corresponding to each resolution as a space resolution layer; performing interlayer prediction on every two different space resolution layers to acquire a predicted residual of a geometric position of the peak of the grid corresponding to each space resolution layer; iterating the predicted residues to acquire final predicted residuals; and performing the graded quantification on the final predicted residuals, wherein coefficients of relatively low quantified layers are low-frequency components of the predicted residuals of the grids, and the coefficients of relatively high quantified layers are detail components of the residuals. According to the embodiment of the invention, the method for encoding the grid by using an iteration method is high in efficiency; and simultaneously, the flexibility of the graded quantification supporting the quality scalability is realized.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a three-dimensional grid encoding method and device based on hierarchical quantization with scalable quality. Background technique [0002] With the development of 3D technology, 3D content has been widely used in multimedia applications no matter in general public places or in professional industrial fields. 3D modeling and representation plays an important central role in industrial fields such as computer-aided design (CAD), electronic medicine, video games, CGI (computer-generated imagery) movies, special effects, and animation. [0003] In general, 3D content is represented by a 3D mesh, which provides the advantages of generality and interoperability in a multi-platform environment. Because of complex modeling, realistic 3D objects may require tens of thousands of vertex meshes, which requires high bandwidth and storage requirements, so efficien...

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N19/124H04N19/13H04N19/30H04N19/61
Inventor 季向阳张磊张永兵戴琼海
Owner TSINGHUA UNIV