The Hardware Design And Implementation Of Portable HD Video Transmitter Based On 4G

In recent years,with the development of video high-definition,big news and emergency events also tend to live in high-definition.However,to achieve rapid response and not subject to time,climate and geographical location restrictions on the live,the traditional satellite broadcast has been unable to meet the requirements,the traditional 3G can only barely transmit SD videos.The development of H.264 video compression encoding technology and the popularization of 4G network in China provide a technical basis for high-definition video broadcast,so research for a hardware circuit for potable high-definition video live transmitter with 4G-based.First of all,by collecting the related data of high definition video processing technology,this paper analyzes the development of 4G HD live broadcast,and puts forward the research significance of this subject.Secondly,a careful analysis of 4G-based portable high-definition live transmitter's design requirements and related technical theory basis.Thirdly,based on the modular design of video pre-processing system,video encoding system and video distribution system hardware system program.Fourthly,the logical relationship between each subsystem and the communication between the subsystems and the video data are systematically analyzed,and the detailed circuit design and circuit board design of the three system schemes and the power supply system scheme.Fifthly,connect the hardware circuit of each system and design the driver of the video receiver chip.Finally,combine software to debug high-definition video transmitter parameters and give the whole operation results.The hardware design project in this paper can meet the requirements of 4G high-definition video broadcast,compared to the existing live transmitter,The proposed portable video resolution conversion,multi-channel video distribution,variable rate coding and audio transmission function,will more practical and portable.