Portable wireless high-definition image transmission system and method thereof

Abstract

The invention discloses a portable wireless high-definition image transmission system. The portable wireless high-definition image transmission system comprises an image acquisition interface, an image compressing module, a COFDM (coded orthogonal frequency division multiplexing) wireless transmitting end module, a COFDM wireless receiving end module, an image encoding module and a video output interface. The portable wireless high-definition image transmission system and a method thereof have the advantages that: the portable wireless high-definition image transmission system can realize remote transmission of 720P high-definition image under the condition of a limited wireless bandwidth; a transmitting end device has the characteristics of light weight, low power consumption and the like; and the portable wireless high-definition image transmission system and the method thereof can be conveniently applied to mobile equipment with a limited load in an expandable way.

Description

[0001] This application was supported by Tianjin Natural Science Foundation (09JCYBJC00100); Tianjin Normal University Development Fund (52XK1001). technical field [0002] The invention belongs to the technical field of video image processing and wireless network communication, and relates to a high-definition video signal collection and long-distance transmission device mainly used in the collection of external dynamic images by high-speed mobile carriers and the return transmission. Background technique [0003] With the development of computer hardware and software and wireless communication technology, wireless video transmission technology has also achieved rapid development, and the application fields of wireless video transmission are becoming more and more extensive, which puts forward higher requirements for the bandwidth and real-time performance of video image transmission . [0004] Wireless image transmission refers to real-time video transmission. There are tw...

AI Technical Summary

Problems solved by technology

Therefore, to develop a wireless image transmission system that can stably transmit high-definition video with a wide frequency band during high-speed movement, two main problems must be solved: one is video compression with a compression ratio as low as possible under high-definition algorithm; the second is high-speed data communication with high stability

The hardware structure of this kind of wireless signal transmitter and receiver is simple and stable, and the video compression processing module has high reliability and controllable cost, but its high video bit rate requires high data transmission speed with the back-end wireless transmission module, which limits video resolution. Rate

[0007] The image resolution and transmission distance index parameters of the current market products are relatively low, and it is difficult to meet the requirements of the system for image quality and communication distance under new conditions

Most of the existing equipment on the market transmits data through the second and third generation mobile networks such as GPRS / TD-SCDMA / WCDMA. The technical means are mature and the product development speed is fast, but the current maximum uplink transmission rate of 2~3Mbps limits the video resolution. rate, and subject to the distribution of base stations and high communication costs, it cannot work reliably in wilderness and severe natural disaster areas, which further limits its application environment

[0008] In places with many obstacles, the existing high-frequency wireless signal transmission equipment sends wireless signals with poor diffraction, high communication costs, and high-power wireless signal transmission equipment will cause certain damage to the human body

At the same time, subject to video compression efficiency, the resolution of the returned image under the current transmission technology is low

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