Industry News

Development and technological evolution of 3G/4G wireless image transmission products

1. What is wireless image transmission?

Such devices, the so-called DVR/NVR/IPC or DVS, are a concept.

To fundamentally understand such DVR/DVS/IPC products, the core is

√ audio and video real-time network transmission

√Local video

√GPS positioning / GIS

√ voice intercom, trunk call

√Photo capture - upload

Other miscellaneous items, such as LEDs, alarms, serial port collection and pass-through, etc., are peripheral functions (may have special meaning for customers with special applications), but from a test point of view, grasping the core functions, there is a main line of testing. Ideas.

Main reference:

Basic concepts and terminology of wireless video surveillance systems

DVR/DVS/IPC/ is actually a concept.

Need to understand the application area

3G4G wireless image transmission, wireless video surveillance products typical industry applications

"Seeing", "Looking at" and "Looking far" are the basic needs of human beings. Wireless transmission is a general product direction. It has a wide range of application requirements in various industries. We not only provide standard For engineering products, we also provide secondary development modules, technical solutions and customized customization services in the form of technical outputs.

2. Main product forms and applications

Front-end wireless image transmission devices are typically classified into the following three categories:

Mobile portable 3G wireless picture transmission equipment, referred to as 3G individual equipment: mobile visual inspection, mobile law enforcement, etc., to deal with real-time image transmission of various emergencies;

3G/4G vehicle MDVR equipment: two-vehicle and one-vehicle on-board monitoring system, which can provide real-time images inside and outside the vehicle for supervision in addition to positioning;

Field wireless image transmission visual monitoring equipment: powered by solar/wind energy, can be used in outdoor, static scenes such as water conservancy, farmland, construction site, oil field power line, etc.;

All devices are uniformly connected to SmartEye, a large-scale network video integrated service platform, which manages and monitors all devices on the back-end platform.

In addition, we have also developed a smartphone/tablet-based graphics product:

MPU/MCP is used to generate video, which is DVS (Digital Video Server), which is equivalent to a single soldier, a vehicle-mounted DVR or a high-definition network camera HDIPC. It collects video, compresses the code, and then transmits it to the network according to the client's client request. For previewing;

This kind of software for obtaining the video and decoding display of the device from the server becomes the client software client. The MCU is a client software running on the mobile terminal (mobile phone, tablet, etc.), that is, the mobile client.

3. System networking

The entire application system consists of “front-end wireless image transmission device + back-end server software + client software”. The server software runs on the server of WINDOWS SERVER and needs to support the fixed-fiber optical network.

4. How to describe a video surveillance device

These so-called DVR or DVS products have common hardware specifications, and the differences are reflected in the software.

3G/4G wireless image real-time transmission products can be described by one of the following specifications: (The table below is for reference only)

Interface
Description

Core processor

High performance HiS multimedia SoC

Video input

1-4 channels of video input, multiple options: support

SD AV/CVBS input
A variety of high-definition video sources: HD IPC (ONVIF capture), HD-SDI, HDMI, AHD/CVI, etc.
Video output

The device does not have an LCD screen display, and can be transmitted to the server through 3G to view video images with related clients;
Can support TV-out output

Audio input

Support MIC/LINE-IN input; simultaneously record sound while recording, audio and video synchronous transmission;

Audio output

headset

Video storage

Support TF card to save video files;

wireless network

Built-in 1 3G/4G module, support Telecom EVDO, China Unicom WCDMA, Mobile TDD 4G, Telecom China Unicom's 4G FDD, to meet the application needs of different scenarios; support a variety of 3G4G online mode, manual, SMS, etc., users can freely control 3G4G Data Flow;

Ethernet

100M, given in the form of miniUSB

Call the police

Leave 4 IOs for alarm input and output

button

2, as alarm input

Yuntai

stand by

Serial port

Provide one way RS-485 and one way RS-232, support PTZ

Positioning

Optional

powered by

5V-12V DC power supply
5V power output

size

PCB: (length) x (width) x (height) mm;

Operating temperature

Working temperature: -10 ° C ~ 60 ° C

Configuration and upgrade

Support for local area network configuration and remote configuration via backend software

Other functions

LED indicator: power, storage, 3G4G wireless network connection indicator

Intelligent Algorithm

Optional

Backend platform

Unified access to Vision Technology's large-scale network video integrated service platform software - SmartEye

5. About the configuration of the device

The configuration of the device can be as follows:

LAN search configuration tool: need a computer/notebook, connect with the device through our device-specific network cable (PC is directly connected to the device or connected through the switch/HUB network), run our LAN configuration tool software (sacdil_pc.exe) This is mainly used for the initial configuration of the equipment when it leaves the factory or after the equipment fails, bring the notebook bag to the site for maintenance;
Device host UI: The device is connected to a display, a USB mouse/or infrared remote control, which can be configured locally; it can be used for quick configuration anytime and anywhere;
After the device is connected to the SmartEye network video integrated service platform on the public network, it can be remotely configured through the SmartEye client/manager. Of course, the premise is that the device must be connected to the network. For example, the 3G4G card is not owed, there is signal, there is electricity. (eg solar power is sufficient);
6. Development history

Historical phases

Description

video

2006~2009

Adopting ADI's Blackfin platform, which is our company's early 3G-A/B equipment; the reason for the final elimination is that the processor performance is not enough, only CIF can be achieved, and one D1 is very difficult;

SD

2009~2012

Adopt TI's DM6446 and later DM365;
DM6446 is equipped with DSP soft core, video compression algorithm H.264 is software, can do intelligent algorithms, such as our current G3 board, can run face, perimeter and other intelligent algorithms for video analysis, but performance Also very reluctant; our internal model is the VA series, there are single and four-way (9030/9040/9050, all customized results);
Later, the DM365 is already an ASIC. There is no DSP soft core. The video compression is done by hardware. The performance is higher than 6446. It can achieve 720Px30fps compression. Our internal model is VB series, for example, it is still shipping. VB_L3, etc.;
The reason for the final elimination is that it cannot quickly meet the needs of China's fast-growing video surveillance industry. The interface is not rich enough and the performance is not enough. For example, it is very difficult to do the 1080P compression all the time;

SD

2013~2015

Fully switched to Hisilicon platform, HiSili series processor ROADMAP is very long, a wide variety, can meet a variety of needs, performance and interface is rich enough; HiSilicon products will be monopolized in China's video surveillance industry for several years, our R & D personnel are Be highly familiar with HiSilicon's SDK.
We started with the HI3515, the VC series platform;
It has been expanded to 3518 (mainly single-channel CMOS HD), 3535 (multi-road clear + high-definition hy brid, actually NVR)

SD + HD

Beginning in the second half of 2015

Opened a 4G wireless map flyer-law enforcement product line based on mobile phone chip, which can eliminate the separate 4G internet module, which greatly reduces the power consumption of the whole machine, and can realize automatic switching of HD-SD, 3G/4G/WIFI automatic Switching, Bluetooth headset intercom and trunking calls, a wiring is not needed when the device is actually used, completely freeing hands;

Beginning in 2015, with the full popularity of 4G, we will fully enter the era of high-definition products, resulting in more diverse and competitive products and solutions. At present, the HD standard is still in the Warring States era. We also need to cater to the needs of different customers. We must support a variety of high-definition video sources such as SDI, HDMI, and AHD to meet different industry needs.

The law enforcement recorder conforming to the national standard is a mobile law enforcement device mandated by domestic law enforcement agencies. The current equipment cannot be networked. The situation of the on-site dispute can only be uploaded by the USB collector after the inspection personnel return to the office. After you get to the server, you can retrieve the playback view, which is actually very inconvenient. The need to return the image of the law enforcement scene in real time has been very strong, but the current equipment can not be satisfied.

Vision Technology's original 3G/4G Netcom high-definition law enforcement recorder, 3G/4G HD graphics flyer, original mobile phone chip map-video program-Android system, 16 megapixel low-light camera, 720P/1080P dual stream Video + real-time image transmission, ultra-low power consumption (compared to the previous generation of "Hai Si and other coding CPU + Huawei 4G module" architecture, system power consumption reduced by half), support unlimited distance cluster calls, can be with the car, individual soldiers We will join the SmartEye, a large-scale network video integrated business management platform, and the necessary equipment for mobile law enforcement departments such as urban management and traffic police. It can support customers to carry out secondary development based on Android system and join their own business software APP.

In addition, the advanced of this device can detect the captured face photos in real time in the mobile crowd, and upload it to the back-end monitoring platform through the 3G/4G network, and perform large-scale comparison on the monitoring platform, which can be used anytime and anywhere during the patrol process. Do face comparisons.

Adopting this innovative approach will bring disruptive changes to the industry.

7. 4G individual law enforcement instrument based on mobile phone chip

7.1 Specifications & Features

Each front-end single law enforcement recording device supports both voice and video services. It can perform real-time image transmission while performing cluster calls. In the multi-party call, the local scene images can be transmitted to the remote monitoring center in real time. So that the leader can sit in the town center and command the eight parties.

7.2 System Networking

Each front-end device supports both voice and video services. It can perform real-time image transmission while performing cluster calls. In the multi-party call, the local scene images can be transmitted to the remote monitoring center in real time, so that the leaders can sit in the center. , commanding all directions.

In the case of multi-party calls, a PPT button is provided on each device to support the user's speech, and each individual device can hear voice commands from the center.