Development Of Individual Soldier Emergency Video Communication Equipment Based On Transceiver Balance And Code Rate Optimization

The informatization of disaster rescue is a major demand of the country,and the establishment of information exchange between the disaster site and the command center is the key to emergency rescue.In view of the information islands caused by secondary disasters such as power outages and network disconnections accompanying the occurrence of major disasters,this work is supported by the national key research and development project "Research and Application Demonstration of Key Technologies of Convergent Emergency Communication Based on Radio and Television System" Efficient video compression solutions for rescue scenarios,and the development of individual rescue equipment for converged communications to achieve efficient transmission of emergency rescue services,including:(1)Aiming at the problem of insufficient bandwidth and large amount of business data in the emergency converged communication network environment,a video coding rate allocation scheme under three-dimensional significance is proposed.To obtain the pixel-wise visual saliency parameters of the three-dimensional scene is based on the existing graph fusion model,then downsampling all the pixels in the saliency map by the center value of k-means clustering,and obtain the coding saliency map for the applicable coding after smoothing by Gaussian filtering Fusion with the complexity map based on texture complexity to get the fusion saliency map.Finally,the significant weight of each block of the saliency map is used to guide the pre-allocation of the code rate and the target bit allocation strategy at the macroblock level,and the ? parameter in the encoder is adjusted to achieve the purpose of rate control.The designed method was verified on the HTM16.8 platform,and the Bicycle and Fountain Bench sequences were verified respectively,and the code rate improvement of 13.60% and 2.78% was obtained,which achieved a significantly guided coding rate strategy and effectively improved video compression ratio and reducing the amount of data transmitted in video services.(2)Aiming at the challenges brought by the heterogeneous converged communication network to the stability of emergency video transmission,this paper uses a hierarchical buffering mechanism and a self-adaptive balance mechanism to ensure the smooth transmission of data streams,so that emergency video communication services can adapt to unstable channel environments.(3)Based on the above-mentioned code rate allocation scheme and adaptive transceiver balance mechanism,a single soldier emergency video communication equipment was developed to overcome the problems of small bandwidth and channel jitter caused by the emergency video transmission of heterogeneous converged communication network.On three heterogeneous fusion channels based on wireless Wi-Fi,4G,and radio and television networks,this equipment can transmit clear picture video at a low bit rate of 100K?1M,and the unidirectional transmission delay and packet loss rate are respectively 0.307 s and 6.6%,at the same time,it can also adaptively change the throughput rate to achieve the balance of receiving and sending,and has better video transmission capabilities and anti-interference capabilities.The equipment was inspected and accepted by the acceptance expert group led by the director of the National Disaster Relief Emergency Equipment Engineering Technology Center,and believed that the development of "single soldier fusion emergency communication equipment" met the project's established requirements;The "Earth City Search and Rescue" equipment exercise jointly organized by the China Earthquake Emergency Search and Rescue Center has achieved good results.