Power Line Communication Camera

Power Line Communication (PLC) Camera

Power-line communication (PLC) or Ethernet over Power (EoP).carries data on a conductor that is also used simultaneously for AC electric power. Transmission or electric power distribution to consumers. It is also known as power-line carrier, power-line digital. Subscriber line (PDSL), mains communication, power-line telecommunications, or power-line networking (PLN). As we know, WiFi IP Cameras was developed to reduce the cabling costs.

However, WiFi technology has its shortage. Such as low stability, limited transmission distance, Interference problem, big bandwidth consumption etc. All these shortage are no longer exists on our PLC Security Systems. With PLC technology applied in our IP Cameras and NVR, we have cracked the main pain points for Home Security Surveillance Systems.

The PLC Cam uses the house‘s power line like a long video cable, ensuring that no connections other than the power outlet are needed. Thus installation is particularly easy: plug the PLC Cam into the power outlet, connect the provided PLC adapter to the DSL router - you‘re done! Even while on holiday or at work: the direct Internet connection and app for Apple iPhone/iPad and Android devices makes individual monitoring possible anywhere in the world.

Power-line communication (PLC) carries data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers. It is also known as power-line carrier, power-line digital subscriber line (PDSL), mains communication, power-line telecommunications, or power-line networking (PLN).

A wide range of power-line communication technologies are needed for different applications, ranging from home automation to Internet access which is often called broadband over power lines (BPL). Most PLC technologies limit themselves to one type of wires (such as premises wiring within a single building), but some can cross between two levels (for example, both the distribution network and premises wiring). Typically transformers prevent propagating the signal, which requires multiple technologies to form very large networks. Various data rates and frequencies are used in different situations.'

A number of difficult technical problems are common between wireless and power-line communication, notably those of spread spectrum radio signals operating in a crowded environment. Radio interference, for example, has long been a concern of amateur radio groups.

Power line can be used to shorten the wiring so that safety cameras, speed up data transfer and recording to Nas and makes mounting the camera becomes easier. If it requires more than one then the connection can power-line connected to the access point in setting exudes wifi and emit a signal with a full bar to obtain the camera so that the camera is always a constant ping without breaking or disturbance barrier wall or conflicting signals.

Advanteges:
1. PLC signal is stable and relible. Siganl is much better than Wi-Fi. No consumtion of bandwidth, no interference.
2. Transmit distance is over 300meter over powerlines. No need dedicated cabling.
3. Plug and Play, super easy operation. We changed the professional CCTV system to easy handling consumer electronics.
4. PLC signal speed is over 200Mbps, 4-ch 1080p video streams flow without delay.

Disadvantages:
If your home electrical wiring isn't up to date, you might not get optimal performance from a powerline networking solution. It's not as fast as Gigabit Ethernet speeds (the fastest networking solution for home or office), but it is on par with current Wireless-N Wi-Fi networking.

Powerline networking is often touted as one of the easiest and most affordable whole-home networking solutions because you don't have to lay a lot of cable or install more wiring in your walls. However, you will still need to purchase adapters that will plug into your electrical outlets. Compared to buying multiple adapters, the price of a single wireless router might make more sense depending on what you'll be networking.

You also have to be careful to choose powerline networking adapters and accessories that use the same standard. There are three standards available from a variety of manufacturers:

- HomePlug AV (available from manufacturers like Belkin, Linksys, Netgear, and ZyXEL)

- UPA, which stands for Universal Powerline Association (available from D-Link, Netgear, and others)

- HD-PLC, which stands for High Definition Power Line Communication (available from Panasonic)

PoE network camera in Global market

Development of PoE network camera in Global market

Since the launching of Power over Ethernet (PoE) standard, global enterprise are eager to utilize this emerging technology in just a few years. According the latest survey, in just six years from 2008 to now, the annual increasing rate of power equipment with PoE technology will reach 33%. In 2014, global market of power devices with PoE technology will be over $5.2 billion, compound annual growth rate will be 38%.

Along with the development of worldwide security market, users start to consider deploying some network cameras and other network security devices. Network surveillance based on PoE is more and more accepted by users and have great development.

PoE (Power over Ethernet) means keeping the current Ethernet cat-5 deployment, assure interface AP for wireless network security cameras and other IP signal devise based on IP signal, at the same time, it is able to power ac electric for those kinds of devices. PoE technology use one general Ethernet cable to transmit Ethernet signal and ac electrical source simultaneously, allowing power and date to be integrated into the same cable system. In the case of guaranteeing the construction cable safety, keep normal answer operation. PoE network camera use PoE technology to realize the network video surveillance, which has power device function to use direct current main provided by power device equipment to transmit to power device via twisted-pair.

Compared to normal network camera, PoE network camera has following advantages: apart from power the connected device through Ethernet cable, PoE reduce the investment cost, as a result, it decrease the overall the deployment costs to  organize the device based on IP infrastructure. Poe not only provide the need for installing wall power connection, which dramatically reduce the plug costs related supporting end devices but also install the network connection device on the place where is hard to deploy the local alternating current power supply, to some content, provide more flexibility. We can separate PoE network camera form power device end in the practice, which can be divide into two types, normal cameras and PoE adaptor. Front end has Ethernet switch for PoE power, and back end has PoE adaptor, which will transmit the twisted cable power to network camera for the working power. Because power device is able to identify the rate of power, when we use ups to power, the advantage of saving energy is more obvious.

Frame Distribution for HD IP Camera Storage

The distribution frame video file HD IP camera storage technology

Put the video in a second frame for logo into the sequence frame, at the same time prepare the HD IP camera storage and playback sequence, divide the different sequence frames several file HD IP camera storage; Single frame sequence file can be played, the effect is equal to record low stream video effect.

All frames used to synthesize completely video playing together, is a high definition or standard definition video effect. When it is needed to recycle the HD IP camera storage space, according to HD IP camera storage strategy planning, part of the first sequence frame area cover the video file. Another part is preserved, thus more efficient use of HD IP camera storage space.

For example, according to the original HD IP camera storage capacity can keep 1 month of video data, after the distribution of the video frame file HD IP camera storage, can keep several months of selective sequence data frames of video files. To have retained the long-term sequence frame video file for part of the cover, realizes the fading type video gradually discarded, long-term retention of video data is not completely disappear, but slowly disappear, and discarded. To maximize the extension of the surveillance video time reserved.

In general, limit the biggest factor is the accuracy problems of the application of intelligent analysis technology. So the development trend of intelligent analysis technology application must be in the direction of improving accuracy. At the same time, on the other hand, you will find some don't care about the accuracy, and pay more attention to the efficiency of some application directions.