Video-based fast dynamic point cloud coding method and system

An encoding method and fast encoding technology, applied in the field of encoding, can solve problems such as lack of research on video encoding, and achieve the effects of high encoding quality, improved efficiency, and fast encoding speed

CN112601082APending Publication Date: 2021-04-02NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-04-02

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Abstract

The invention discloses a video-based fast dynamic point cloud coding method and system, and the method comprises the steps: obtaining a coding tree unit of a video frame, determining the block type of a CU through calculating an occupation graph in the coding tree unit, and enabling the CU to represent a coding unit; traversing the coding tree units by using a fast coding mode decision scheme todetermine a coding mode; and using the fast coding decision scheme for determining a coding mode in a mode of selectively skipping blocks by utilizing rate distortion optimization characteristics of different block types. The method has the advantages that compared with the prior art, the rate distortion optimization characteristics of different block types are researched to accelerate the encoding of geometric and attribute videos, so that the encoding efficiency is greatly improved; and the method has the characteristics of high encoding quality, high encoding speed and the like.
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Description

technical field

[0001] The invention relates to a video-based fast dynamic point cloud encoding method and system, belonging to the technical field of encoding. Background technique

[0002] With the advancement of 3D capture technology and the emergence of 3D devices, people pay more and more attention to the 3D representation of the real world. A point cloud is defined as a set of 3D points, where each point is represented as 3D coordinates and specific properties such as color, material reflection, etc. Point clouds are used as an efficient means to represent 3D surfaces of objects (such as people) and scenes, so they can be used in many 3D application scenarios, such as cultural heritage preservation, large-scale 3D dynamic maps, virtual reality, and immersive telepresence. According to the application scenarios, point clouds can be divided into three categories: static objects and scenes, dynamic objects and dynamic acquisition. The present invention mainly focuses on...

Examples

Embodiment Construction

[0033]The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0034] How to speed up the coding efficiency of geometry and attribute video? The resulting geometry and attribute videos are compressed using the HEVC encoding method. As is known, video frames in HEVC are divided into sequences of Coding Tree Units (CTUs). Each CTU has a quadtree structure, where the node is called a coding unit (CU). Furthermore, a prediction unit (PU) is introduced as a basic unit in predictive coding. In order to obtain the best coding performance, rate-distortion optimization (RDO) is used to select the best CTU structure and the best prediction mode. RDO is a computationally intensive process as it needs to iteratively execute the service pattern and traverse the CTU q...