The advantages of IP and TVI over HD-SDI and CVI

Posted by Daniel 07/28/2016 1 Comment(s)

The advantages of IP and TVI over HD-SDI and CVI

There have been several technological breakthroughs since the past few years. It was only until two decades back that we started transforming from VHS to CDs and in the next decade, we took it to the next level with Blu-Ray Discs. There has been constant evolution in technology.

On similar lines, HD video recording also has four standards that are highly debated for one over the other: HD-SDI, TVI, CVI and IP. Similar to how smart phones have replaced all communication methods off late, IP cameras and NVRs have eaten up the market and HD-SDI and its replacement, the CVI, have been sidelined. However, it is anticipated among experts that TVI still has a fair chance.

Most of the major manufacturers have stopped manufacturing HD-SDI systems. The advertising of HD-SDI and its basic principle proved to backlash the popularity. It was advertised as “never having to rewire”, which was initially widely accepted. However, when people realized that they will actually have to make changes to a system, or if there are certain issues that might arise during operation, the cabling of HD-SDI would get highly problematic and you would realize how beneficial it would be if rewiring was possible.

This might get you wondering about the type of format to be used for installation of a video recording system.

IP cameras have proven to be the best technology available and no other technology comes close to it. The advantages include easy installation, easier to maintain and they do not require additional power lines. Installation is as simple as plug and play. Slowly, cameras which make use of HD over analog technology such as HD-SDI, AHD, TVI and CVI have started transmitting on HD resolutions (1920 X 1080P), IP cameras take it to another level by recording and working at 4K resolution (4096 X 2304P).

Also, there has been remarkable progress in the field of IP recording. Sony came up with a 10K IP camera last year. The prices of IP cameras might have a correction owing to the growing competition by the end of this year.

As devices continue to get compatible with “network of things” framework, they will be automated and only IP systems will be able to interact better with other systems. With the dropping prices of IP cameras, the world will accept it widely in the coming years owing to its ability to interact with other systems.

Are IP cameras vulnerable to hackers, as they are connected to the internet?

Although IP stands for Internet Protocol, it is not necessary that they are vulnerable to hackers. The IP cameras only use an IP address to communicate with devices belonging to the same network, just like your local LAN, but are not connected to the internet. IP cameras are also smart as they have an inbuilt processor to deliver the video feed in a digital format, when compared to HD-SDI, CVI and TVI systems which send it in a format that has to be processed by the processor, thereby increasing the resource usage of your system. There is no overhead on the processor when you use IP cameras. The IP cameras make use of NVR, which subnets their address, due to which hackers will not be able to detect the presence of these cameras in the network. NVRs and DVRs can be accessed from remote locations securely by logging in using your credentials and it secure. To enable this, you will have to configure remote viewing in the system.

How to upgrade to IP systems if you already have a BNC Siamese system in place for your existing analog system?

BNC Siamese cables are highly expensive to install. Also, once installed, you would not prefer to remove the cable and replacing it with new ones. But owing to the shift in technology, it is highly recommended that you do it soon to have a better system in place.

There are two technologies available in the market hat allow you to upgrade to HD without rewiring an existing system. However, you will then have to use the secondary format.

How TVI and CVI came into prominence prices of HD-SDI dropped?

HD-SDI can be seen as replacements of HD-CVI and HD-TVI, which had a common complaint of signal loss when they were connected for long distances using BNC Siamese cables.

Manufacturers who had already manufactured HD-SDI, in a bid to push their products in the markets started offering price cuts on the product. However, HD-SDI is not a cost-effective solution in the long run.

The fall of CVI

As of now, there is only one company that still manufactures HD-CVI systems such as HDCVI DSP, HDCVI and DVR boards.

If the company does not move to other technologies and solely relies on CVI, it will start running into losses soon.

The cable used for CVI is not backwards compatible and analog cameras can be used with it. The CVI cables are not compatible with their own previous generations as well. For example, you cannot use a Generation 1 CVI 1080P cable to carry a CVI 720P video feed. Only a few versions of the cable can operate across both the resolutions of video. Also, the cost of CVI cables is expensive and wiring will cost significantly higher. If you had wired your building using the Generation 1 cable, you would have to stick to the same system and cannot upgrade to a new system without a full rewire of the system.

TVI is manufacture by nearly 100 companies as of today, while CVI is manufactured only by a single company. This indicates that the market focus has already shifted away from CVI and it is not preferred at all in the market.

Backward Compatibility of HD-TVI manufactured by multiple manufacturers.

Interestingly, the company that developed TVI, Techpoint, based in San Jose, CA, was into manufacturing cameras and they were chipset manufacturers. Hence, they just developed the technology and multiple manufacturers started manufacturing the product.

However, CVI is manufactured exclusively by a single company and hence, if the company shuts down some day or stops providing spares, your entire system will be of no use. TVI has parts that are generic and you will have multiple providers to offer the same product. You can choose from any company based on your need and the system will still be compatible. You also have the choice to have a mix and match of different components from different manufacturers when you incorporate a TVI system, thereby making it a preferred choice.

We definitely see innovation and upgrades in the existing TVI and CVI technologies over the next few years and manufacturers will provide a better level of cross-flexibility in the coming years. As of now, TVI is being used by over 100 manufacturers.

TVI stands for Transport Video Interface and it is massively eating into the space owned by analog systems previously, as it is backward compatible and can be used with 720P and 1080P versions. TVI has been adapted by several major manufacturers such as TVT, Samsung, Hikvision etc. which are some of the largest CCTV manufacturers of the world.

In the long run, HD-TVI will be used to replace the conventional analog cameras used. However, IP cameras will continue to stay a league apart and will always remain preferred in the market. This is mainly due to the fact that they come with an inbuilt processor and use IP addresses, due to which you can help the cameras to communicate with multiple systems over the internet. The camera settings can easily be changed using your web browser and no installation is required for IP cameras. Once you plug the wire, the camera will be up and running without any delay.

HD-TVI is better than HD-SDI as they provide backward compatibility and require no complex installation. You can also connect analog cameras using HD-TVI. If you are confused between HD-SDI and HD-CVI, we highly recommend that you expand your horizon and stick to IP cameras or in the worst case, wait for TVI.

Analog systems are not at all recommended and we advise you to stay as far as possible from them. Check for the specifications of camera systems offered by companies to know the technology they use. If there is no mention of the technology used, you can be certain that they are trying to push HD-SDI technology. Analog HD recording systems are useless in the long run and no major manufactures have continued to manufacture AHD, as it is not well received in the market.

How NVRs, TVI and IP cameras will grow highly popular when compared to HD-SDI and CVI

Although HD-TVI is a good technology and has a lot of advantages, it necessarily does not become the best. TVI will definitely emerge as the second best technology by winning over analog. However, it does not even come close to the existing IP technology and IP recording systems have continued to remain the best.

The problem with TVI, HD-SDI and CVI is that digital circuitry is made use of to transform the analog signal to digital signals. This results in a loss of quality as they cannot come close to a digital recording and digital transmission.

The resolution of 1080P generally corresponds to 2.4 MP. The IP cameras we have in market these days range from 3 MP to high-end cameras of 6 MP. For people who are still on a BNC Siamese network, IP system is the best upgrade you can get.

Users who have previously used BNC Siamese systems and cables will be delighted to look at the installation costs of IP systems and the quality they offer at such competitive prices.

How IP was chosen over HD-SDI?

By the mid of 2013, most of the major manufacturers started deserting HD SDI and started adapting to IP devices, owing to the relatively higher costs of production involved in HD SDI. TVI offered better technology at a comparatively lesser price. Also, HD-SDI systems had to be abandoned if the camera stopped working and you could not replace or add a camera once the system is developed.

Alongside, the cost of IP cameras dropped over the years when compared to its price when it was launched. Also, IP cameras inarguably offer better video quality over HD-SDI, due to which most of the manufacturers decided to stick to IP cameras. Also, the level of customization in the system that can be achieved using IP cameras is higher.


1 Comment(s)

augusto suarez:
10/29/2017, 11:07:05 PM

Congratulations for this report. I am 68 years of age and all new to this, but you have laid it out so well to grasp and understand the difference. Most companies are not that honest and leave you with products that will be outdated.Now I know what to look for and buy.Thank you .Augusto Suarez

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