Satellite-borne video compression system and method for direct transmission of video data to ground

Abstract

The invention discloses a satellite-borne video compression system and method for direct transmission of video data to the ground. The satellite-borne video compression system comprises a high-speed parallel video data interface module, a video image frame splicing module, a high-ratio high-speed compression module and a multi-path parallel code stream splicing module. The high-speed parallel video data interface module is used for supporting simultaneous image access, Base mode protocol analysis and format conversion of multiple groups of parallel camera interfaces; and the video image framesplicing module is used for receiving the images output by the high-speed parallel video data interface module and completing parallel caching and clock domain conversion of multiple paths of images and splicing output of video frames. According to the invention, high-performance H.264 video compression is adopted; a new satellite-borne video compression frame structure is provided, the original load data rate is greatly reduced, high-speed video load data can be transmitted to the ground in real time through a data transmission load, and the problems that in a conventional scheme, the high-speed load data compression rate of a video minisatellite is low, and a ground station cannot obtain the data in real time are solved.

Description

technical field [0001] The invention belongs to the field of small satellite video monitoring, and in particular relates to a satellite-borne video compression system and method for directly transmitting video data to the ground. Background technique [0002] Small satellites generally refer to satellites weighing less than 100kg. They have the advantages of low manufacturing and launch costs, short R&D cycles, and support for batch networking applications. They have developed rapidly in recent years and their applications in various fields have increased significantly. With the development of technology, the payload performance and data rate of satellite optical remote sensing are getting higher and higher, and the payload data rate of small video satellites has reached the order of ten Gbps. However, the development of the ground transmission capability of the small satellite data transmission payload does not match the development of the remote sensing payload capability,...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a space-borne video compression system and method for direct transmission of video data to the ground, which supports direct transmission of 8K high-resolution video data to the ground, and solves the low compression rate of video small satellite load data under conventional solutions , the problem that the ground station cannot obtain real-time

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