System Introduction

The high-definition digital individual unit can upload the on-site image information collected by the high-definition camera to the satellite communication vehicle through a microwave link; It can be transmitted back to the command center through satellite links or 4G links. The satellite communication vehicle and command center can receive new audio and video data uploaded by high-definition digital individual soldiers, and can also conduct real-time two-way voice communication with the front-end high-definition individual soldiers. They can listen to real-time voice reports from individual soldiers on site and command and dispatch them, allowing commanders to understand the situation in real-time in the command center and provide strong basis for command decisions. High definition digital individual soldier equipment can be carried by a single person, using a combination of fixed location cameras (mobile) and motion tracking cameras (mobile) to capture high-quality images of important scenes and main parts from different positions and angles in urban, suburban, and mountainous environments. The on-site images and sound signals are transmitted wirelessly to satellite communication vehicles within a range of 1-3 kilometers. High definition digital individual soldier equipment is small in size, light in weight, and flexible in mobility. It can be carried by frontline personnel to reach the scene that satellite communication vehicles cannot reach, achieving fast, safe, and stable transmission of on-site audio and video data.

system composition 

The main equipment of the system includes high-definition digital individual soldier transmitter, handheld camera, voice headset, antenna, back clip and other accessories, as shown in the following figure.

The handheld camera is responsible for collecting on-site video images, which are connected to the transmitter through a video cable. The call voice earphone device is connected to the transmitter through an audio cable. The digital single soldier transmitter can encode and modulate the input audio and video data, modulate it into a radio signal, and finally transmit the signal through a radio frequency antenna to upload the signal (audio, video, positioning data) to the satellite communication vehicle system and command center. The satellite communication vehicle system and command center can send reverse voice signals to the digital individual host. The digital individual host demodulates and decodes the sent voice signals and outputs them through a headset, achieving two-way voice communication between on-site personnel and the satellite communication vehicle and command center. Realize effective transmission of audio and video in complex environments and efficiently complete tasks.

system function

The high-definition digital single soldier transmitter adopts a portable backpack style, which can be combined with a dedicated backpack clip and carried by on-site personnel. Professional broadcasting level standard, with adjustable bandwidth, non line of sight transmission, audio and video encryption, high-definition image quality and other characteristics, can transmit stable audio and video signals in real-time during high-speed movement and urban building obstruction. It has multiple interfaces such as HD-SDI/HDMI/CVBS.

The external link devices of the high-definition digital individual soldier system are shown in the following figure:

Dynamic Communication Satellite System

The satellite communication vehicle can seamlessly connect with the backend ground station system of the regional public security bureau through satellite links. The satellite communication vehicle can display real-time on-site image information and other image information collected by multiple cameras on the roof and inside the vehicle, as well as individual mobile camera equipment, on the vehicle screen through wired, wireless and other communication methods. At the same time, it can be transmitted to the Bazhou Public Security Bureau Command Center through 4G public network system or VSAT satellite communication methods.

Audio and video capture unit

The audio and video capture unit consists of a high-definition laser gimbal camera, a rear camera, an in car camera, and a single soldier image transmission. The audio and video acquisition unit mainly consists of wireless microphones, wired microphones, and backpack mounted individual soldiers for real-time acquisition. The image acquisition subsystem utilizes various effective information acquisition methods to monitor and collect various complex scenes, providing real-time and intuitive decision-making information for commanders. The main information collected by the system includes real-time images of the command site, environment, and in vehicle environment.

Display unit

The display unit consists of headrest display, ceiling mounted display screen, GPS navigation display screen and other devices. The display unit is capable of displaying, playing, and switching control operations on multimedia information such as videos, images, graphics, and data from various sources. The video display equipment for this project is required to be composed entirely of high-definition devices. The display system presents on-site information on the screen in a visual and intuitive manner, providing auxiliary decision-making support for command and decision-making personnel to grasp the on-site situation and control the command. The signal switching system is used to select and switch between synchronous and asynchronous output of video and audio signals to the display system, audio system, and other systems; It can simultaneously track, preview, and monitor the quality of computer information and video/audio signals, and configure video/audio signal switching and monitoring systems with different capacities and combinations according to application requirements. The storage system mainly stores the collected audio and video images in real-time for easy access and viewing at any time.

Audio and video processing unit

The traditional implementation method of ordering generally involves multiple subsystems such as audio, video, control, recording, video conferencing terminals, etc., and adopts a multi vendor and multi device stacking implementation method according to their functions. There are:

Multiple vendors: Each subsystem is independent, and a project requires coordination with multiple vendors for technical confirmation and order allocation.

Complex system: Each subsystem is often difficult to coordinate and troubleshoot due to incompatibility issues with other systems through wiring.

The ratio of space to weight points is large, which accounts for a large proportion of emergency vehicle space

The design concept of this highly integrated single audio and video integrated processing platform is to highly integrate the equipment in one cabinet into one design, providing lossless display and visualization of multimedia network streams for the local area. It can integrate the collected video and audio signals and computer dynamic screen signals for synchronous recording, live streaming, and on-demand, and can be managed through an intelligent central control system. To achieve the goal of "highly integrated and easy to use" through a visual centralized control interface and entrance.

System advantages

Highly integrated, integrating the following 6 functions into one. AVCRTM Six in One: Integrating digital audio processor A, seamless video mixing V, programmable central control C, recording and decoding R, video conferencing terminal T, and multi-party interactive MCU.

Programmable visual centralized control management operations.

Save space, reduce weight, simplify wiring, and decrease

Visual Integrated Management Unit

The visual comprehensive management unit is mainly used to implement functions such as audio and video scheduling. It is an application software that facilitates the control and management of audio and video integrated processing hosts. The software is an application software that integrates modules such as centralized management, audio and video control, central control management, and live interactive control. The software provides device embedded GUI, WEB, and WIN OS operation client.

Centralized control management: supports the management of single or multiple integrated processing hosts

Audio and video control: supports video drag and drop for output switching, supports centralized control of audio input and output

Visual operation: The visual operation interface and open software SDK interface are developed through secondary integration.

Programmable central control: an open programmable central control that supports multiple interfaces such as RS232/485/IR/IO.

Live interactive control: supports one click live streaming and one click interaction control, etc

Recording management: supports single or multiple stream one click recording, pause, stop, etc

Video conferencing system

The video conferencing system mainly includes video conferencing terminals, which are used for audio and video communication between front-end staff and command center personnel. The video conference terminal adopts high-definition codec, which adopts a beautiful split design scheme, all aluminum material, body heat dissipation, and ultra quiet. The system architecture is simple, stable and reliable, with high cost-effectiveness. At the same time, the design fully considers the application scenarios of satellite channels and adopts industry-leading anti packet loss technology, which can effectively be used in harsh network environments.