The application of Lean mobile video transmission system in emergency projects

The rapid development of network technology and the progress of video coding have also led to the simultaneous development of mobile video transmission systems. As a new era of Levin mobile video surveillance system, has the following characteristics:

First, a good ability to adapt to a variety of complex network environments

1.3G/4G network inter-operator multi-card mixed-mode mixed-mode binding technology: Bandwidth can be superimposed by multi-card binding. In the case of poor network conditions, the total bandwidth is increased to transmit 720p video. In locations where the network conditions are normal, 1.5MB or even 2M of stable bandwidth can be obtained through multi-card binding, which can make the transmitted video bit rate higher and the effect more clear and stable. The multi-card bundle can smooth the network jitter, and the video and audio transmission is more smooth when it is difficult to avoid the fluctuation of the wireless network.

2. Multiple network access capabilities (3G\\4G\\satellite, 4G private network, etc.): Supports multiple network backups and complements such as 3G, 4G, Wifi, satellite, LAN, etc., reducing transmission equipment under different networks. The repeated configuration saves equipment investment and reduces system maintenance.

3. Multi-network smooth switching: In a multi-network access environment, when a certain active network fails, the network can be automatically switched, and the video and audio are not interrupted during the switching process.

4. Dynamic adaptive adjustment function: When the wireless network generates jitter for a long time and packet loss is unstable, the system automatically adjusts the coding rate to adapt to the bad network environment in a short time; it does not cause long-term card due to network factors. After the network returns to normal, the system automatically calls back.

5. You can customize the video delay and video quality as needed.

More practical technical features

Support GIS positioning, marking track and speed

Bluetooth audio access

Touch screen control, friendly interface

On-board 12V power supply for easy installation and supply

Drop-resistant, no hard disk design, suitable for use under harsh working conditions

6. Due to the randomness of the location of the mobile video command system, the system's ability to adapt to multiple networks is very demanding, such as the use of fixed networks in locations with fixed network conditions, and the use of public 3G/4G/WIFI in locations without fixed networks. Network operator services use satellite communications links under extreme conditions. The third-generation mobile video command system supports the deployment of only one set of terminals when selecting different networks, eliminating the need to install multiple sets of equipment.

Second, transmission 720P, 1080P high-definition video

1. Two-way 720P high-definition video encoding capability: For real-time transmission and local video storage, two-channel encoding can be set independently of the encoding parameters.

2. High compression ratio coding technology: Using H.264 HP ultra-high compression video coding, it can transmit 720P HD video at bit rates as low as 512kbps (64KB/s). Effectively reduce the threshold for transmitting high-definition video over wireless networks, dramatically reducing bandwidth usage and making more efficient use of valuable wireless network resources.

3. Provide a variety of network access and 3G/4G multi-card multi-operator Soul network mixed mode binding technology: support 3G/4G, Wifi, satellite, fixed network and other different network access capabilities, select the most in different use scenarios The JIA network uses multi-card binding technology to increase the effective bandwidth and smooth network jitter so as to achieve the most JIA video effects.

4,720P, 1080P HD video can provide more on-site details, thus providing more accurate and rich information for remote commanders to make accurate and timely decisions. The quality of the traditional CIF and D1 will appear blurred on the large screen of the command center, and the 720P and 1080P image quality can bring unprecedented experience.

Third, two-way video interaction, to achieve joint command of mobile command and fixed command center

1. Two-way video and audio interaction capability: The system is built according to the video conference system and relevant optimization is performed according to mobile use. Point-to-point and multi-point mobile video conferences can be conducted between terminals at any time. Two-way audio and video communication makes the command more accurate, more comprehensive, and more convenient.

2. Ultra-low latency, command lip synchronization: 3G video conferencing-level 3G video transmission technology controls the average system delay to about 1 second (including network delay), and strictly complies with the lip-sync standard of video conferences, thereby satisfying Real-time interaction requirements.

3. Unified communications convergence, supporting the standard H.323 protocol of traditional videoconferencing: The application architecture of videoconferencing technology ensures seamless integration with existing mainstream fixed-line videoconferencing, greatly improving user convenience. Enhance the flexibility of system applications. The traditional H.323 video conference room can also realize seamless two-way audio and video communication with the wilderness on-site at any time.

4. Multimedia command based on H.239: The H.239 protocol that supports the video conference standard can directly deliver the dual stream of the traditional video conference system to the mobile terminal. The mobile terminal can receive remote technical documents such as documents, pictures, videos, etc. in real time, making up for the shortcomings of simple remote audio and video commands, improving command efficiency, and enriching the content of commands.

5. Two-way encoding, decoding all the way: The device hardware performance is excellent while two high-definition encoding, all the way HD decoding. One-way encoding is used for real-time transmission, one-way encoding is used for local recording, and video data is not lost.

6. The two-way video technology breaks through the bottleneck of the traditional mobile command system's one-way video backhaul, allowing users to quickly set up a mobile video command center at any time, such as temporary command tents and command vehicles, that is, temporary video command. Moving forward can even facilitate the movement and command in the command vehicle, greatly improving the command flexibility.