Ok, I wasn’t planning on a “part 2” to “The Future of Analog CCTV” or turning this into a series. But guess what? Looks like I am now. In 2012, there was a break through of 2 new hi-def over coax CCTV formats that came out (and 1 in 2013) and are in competition with one another (think “Beta vs. VHS”-if you don’t know what that is, look it up) and I am not sure if anyone really knows the difference or the pros and cons of each new format.
As a refresher from Part 1, up until HD-TVI (or HD-CVI) was available, analog CCTV video was limited to 960H. This was the highest analog video transmission available for several years and if you wanted higher resolution, you had to switch to either HD-SDI (now obsolete) or Network IP video formats. So, what is HD-TVI? Well, it stands for High Definition Transport Video Interface. HD-TVI was invented by Techpoint, Inc. in Silicon Valley in 2012. Techpoint met the market demand for hi-def analog-over-coax solutions and introduced the HD-TVI chipset.
HD-TVI transmits 720 and 1080p video signals over traditional coax cable and also audio and data signals over distances up to 500 meters (1600 ft.). Also, like HD-CVI, by adding TVI cameras and a DVR to an existing coax cable infrastructure, users can upgrade their system to a brand new 1080p hi-def system..
But, is HD-TVI the future of analog CCTV?
The BIG player in adopting and making TVI available to the world is Hikvision. Hikvision is the main competitor of Dahua Technology, whose product is HD-CVI. Even though Dahua entered the market earlier, TVI is now manufactured by over 100 CCTV companies from around the world.
This means you have the option to buy TVI cameras and DVRs from a lot of different manufacturers (unlike CVI). The downside to this is with all the different companies selling TVI, there are some really great products and some really cheap crap. So, be careful.
The really big news, though, is Hangzhou Jufeng Technology (one of the leading manufacturers of embedded DVR solutions) just announced (Oct. 2016) “XVR” products. This is a new line of embedded DVR products using Techpoint’s HD-TVI 3.0 chipsets supporting “universal compatibility” of HD-TVI, AHD and CVI.
Also, Techpoint’s new family of HD-TVI 3.0 products supports not only universal hi-def analog compatibility on the DVR, but also high megapixel resolutions of up to 8MP (or 4K). Previously, higher video resolutions beyond 1080p were only supported by IP products. Is TVI the future? You decide. Click to read the HD-TVI 3.0 press release.
Advantages of HD-TVI
- Installers or DIY’ers do not have to deal with setting up networks, routers and dealing with bandwidth issues.
- You don’t need to know anything special about CVI because it installs just like analog and all CCTV installers and DIY’ers already know how to do this.
- Analog hi-def 720p/1080p resolutions
- Transmit audio, video and data signal over coax cable
- No quality loss and delay for hi-def video transmission
- Long distance transmission capability (1600 ft.)
- Easy to upgrade your existing analog system to hi-def system
- Real-time preview without delay
- With the new HD-TVI 3.0 standard recently announced, 8MP (!) cameras are due.
- Future-proof? TVI continues to evolve and change while bringing with it new functions and features.
- COST. These systems are cheap compared to hi-quality IP systems. They are right around the same cost as an older analog system.
- Just like CVI, HD-TVI Tribrid DVRs are compatible with analog, TVI and IP cameras on any channel and in any configuration.
- TVI cameras max out at 3MP whereas IP cameras have more choices in this area.
- There isn’t enough mention of HD-TVI in the CCTV trades.
- IP is more widely known as the hi-def video solution.
- Most of the CCTV industry’s attention has been on IP.
- TVI could have a faster acceptance if home and business owners knew they could keep existing coax they already have.
By reading Part 1 and Part 2, is easy to see HD-TVI and HD-CVI have very similar features. However, HD-TVI comes from a U.S.-based company that does not supply to only one manufacturer and may be more likely to become an industry standard, not a proprietary technology/solution.
So, what’s better? It’s going to be up to you to compare the images and determine if you think one looks better than the other, or if your final decision is going to be based on other factors.