Video image coding and decoding methods and devices

Abstract

The embodiment of the invention provides video image coding and decoding methods and devices, wherein the video image decoding method comprises the steps of: analyzing a high-resolution image code stream, and generating reconstructed images of a first type of sub-images and auxiliary information of the first type of sub-images, wherein the auxiliary information represents the dimension information of the sub-images and position information in images to be reconstructed at a decoding end; the sub-images are a pixel set in any continuous region in the images to be reconstructed at the decoding end; and the sub-images of the images to be reconstructed at the decoding end are not overlapped mutually; when complete reconstructed images at the decoding end cannot be obtained according to the reconstructed images of the first type of sub-images, analyzing a low-resolution image code stream, and generating reconstructed images of a second type of sub-images, wherein the resolution of the second type of sub-images is same as that of the first type of sub-images; and, according to the auxiliary information, splicing the reconstructed images of the first type of sub-images and the reconstructed images of the second type of sub-images, and generating the reconstructed images at the decoding end.

Description

technical field [0001] Embodiments of the present invention relate to the field of video image compression, and in particular, to a method and device for encoding and decoding video images. Background technique [0002] With the rapid popularity of a series of virtual reality (Visual Reality, VR) products and applications such as virtual reality glasses (Oculus Rift), virtual reality helmet (Gear VR), browsing video content or conducting real-time video conversations through VR products has become a popular choice for VR products. One of the important applications. [0003] A common form of VR terminal equipment is a head-mounted viewing device, usually a pair of glasses, in which a built-in light-emitting screen is used to display video images. The device is equipped with a position and direction perception system, which can track various movements of the user's head and present the video image content of the corresponding position and direction on the screen. The VR term...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that in order to meet the needs of users to watch video content from any viewpoint, it is necessary to store a large amount of video data and encode video data from multiple viewpoints, which increases the data processing complexity and power consumption of the codec device, and further provides real-time communication for panoramic video. increased difficulty

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