720p (1280×720 px; also called HD ready, standard HD or just HD) is a progressive HDTV signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9, normally known as widescreen HDTV (1.78:1). All major HDTV broadcasting standards (such as SMPTE 292M) include a 720p format, which has a resolution of 1280×720; however, there are other formats, including HDV Playback and AVCHD for camcorders, that use 720p images with the standard HDTV resolution. The frame rate is standards-dependent, and for conventional broadcasting appears in 50 progressive frames per second in former PAL/SECAM countries (Europe, Australia, others), and 59.94 frames per second in former NTSC countries (North America, Japan, Brazil, others).
The number 720 stands for the 720 horizontal scan lines of image display resolution (also known as 720 pixels of vertical resolution). The p stands for progressive scan, i.e. non-interlaced. When broadcast at 60[note 1] frames per second, 720p features the highest temporal resolution possible under the ATSC and DVB standards. The term assumes a widescreen aspect ratio of 16:9, thus implying a resolution of 1280×720 px (0.9 megapixels).
720i (720 lines interlaced) is an erroneous term found in numerous sources and publications. Typically, it is a typographical error in which the author is referring to the 720p HDTV format. However, in some cases it is incorrectly presented as an actual alternative format to 720p. No proposed or existing broadcast standard permits 720 interlaced lines in a video frame at any frame rate.
A 720p60 (720p at 59.94 Hz) video has advantage over 480i and 1080i60 (29.97/30 frame/s, 59.94/60 Hz) in that it comparably reduces the number of 3:2 artifacts introduced during transfer from 24 frame/s film. However, 576i and 1080i50 (25 frame/s, 50 Hz), which are common in Europe, generally do not suffer from pull down artifacts as film frames are simply played at 25 frames and the audio pitch corrected by 25/24. As a result, 720p60 is used for U.S. broadcasts while European HD broadcasts often use 1080i50 24* frame, with a horizontal resolution of 1920 or 1440 depending on bandwidth constraints. However, some European broadcasters do use the 720p50 format, such as German broadcasters ARD and ZDF, and the Norwegian Broadcasting Corporation (NRK). Arte, a dual-language French-German channel produced in collaboration by ARD, ZDF and France Télévisions, broadcasts in German at 720p50 but in French at 1080i50. The Flemish Broadcasting Company (VRT) in Belgium was using 720p50, but switched to 1080i50 a few years ago.[when?]
The 1080 and 720 in 1080p and 720p stand for vertical screen resolution, or height, in pixels. The more pixels there are in an image, the clearer it will be. As such, a screen resolution of 1920x1080 (two million pixels when multiplied) should appear twice as sharp as a resolution of 1280x720 (fewer than one million pixels). Meanwhile, the p in 1080p and 720p stands for progressive scanning, which updates full frame images more quickly than traditionally interlaced content.
HD DVDs contain 720p content and sometimes 1080p, while all Blu-ray discs contain 1080p content. Regular DVD quality can vary considerably, with some displaying content at a resolution lower than 720p, such as 480p. Moreover, there are still DVD players around that only carry support for up to 480p or 480i, meaning a viewer cannot get the full experience of any high-definition DVD they insert into the player.
Netflix typically streams at 720p, but with the release and expansion of what it calls "Super HD," users are able to stream more and more content at 1080p quality with a high-speed internet connection. Apple TV allows users to choose between 720p and 1080p streaming. DirecTV displays a "1080pHD" logo on 1080p pay-per-view content, and all their latest DirecTV Cinema content is in 1080p. On YouTube and Vimeo, high quality videos often allow for 720p or even 1080p streaming.
Modern smartphones, like the iPhone 5c/5s, the Samsung Galaxy S5, and the HTC One, tend to film at 1080p quality and at 30 frames per second, if not better. Again, resolution is not all there is to picture quality, but for the average user, modern smartphones' video recording capabilities have the potential to be just as good for casual video-making as cheap camcorders.
Screen resolution can be especially important in video gaming. Because there are more pixels in 1080p, less anti-aliasing is required for a smooth visual experience. This means that 1080p will not only likely look better than 720p, but will lead to a better gaming experience overall, as anti-aliasing can slow down a console or computer.
It means that if you need to monitor a large area with four 720p HD security cameras, only ONE single 4K CCTV security camera will get the job done, leaving no blind spots and no opportunity for potential thieves.
In the same H.264 video standard, there is no doubt that 4K ultra HD security cameras would require more bandwidth usage and storage consumption, compared with 1440p IP cameras, 1080p IP cameras and 720p IP cameras.
Important Note: Actually, some high quality 1080p Full HD security cameras might also offer you clear images with vivid details, just like the Reolink Argus 2E 1080p rechargeable battery security camera (shown as below).
Now that you have learned the differences among 4K security cameras, 1440p security cameras, 1080p security cameras and 720p security cameras, you can be off to choose the one that best meets your security needs and budget.
With the introduction of the high-definition (HD) resolutions such as 720p and 1080p, the aspect ratio became 16:9 also named widescreen, and was established as the new worldwide standard by TV industries and laptop screen manufacturers.
In this note, we examine Pelco's 960p HD positioning for its HD Spectra line. In a recent promotional video, Pelco claims the superiority of 960p over 720p PTZ cameras and that they are the 'only' ones to provide this. We agree on the former but the latter is clearly incorrect.
While fixed cameras often do not benefit from greater vertical resolution, PTZs usually do. With fixed cameras commonly mounted 9 - 12 feet high and aimed straight ahead, usually the top and the bottom of the video is 'wasted' as it captures the sky or the floor. Not only might you not gain much from 960p over 720p, one could argue that 960p is worse as it increases one's storage and bandwidth costs. By contrast, PTZs will be aimed in many different directions and are often mounted high to look down on scenes. Often, the extra vertical coverage provided by the 960p camera will provide important additional coverage.
On the other hand, we disagree with Pelco's contention that they are the only ones that do this or that you would miss this with other manufacturers. Some of Pelco's largest competitors only offer 720p HD PTZs - Axis, Sony and Panasonic. However, other manufacturers offer 1080p PTZ cameras like Sanyo and the Feb 2010 announcement by Bosch of a 20x 1080p PTZ. Additionally, Canon will be releasing a 1.3MP PTZ this quarter. The 1080p provide even more coverage than Pelco and the 1.3MP PTZ will provide the same.
In the end, I learned that there is a noticeable drop in video quality not just from 4K down to sub-HD, but also from 1080p down to sub-HD. What really matters, though, is whether or not that difference is worth the extra monthly cost in your particular situation.
Some modern TVs can refresh at double this rate, or 120Hz (120 frames per second). We've covered this before, with 1080p HDTVs, and it's the same idea with 4K TVs. Certain parts of the world have TVs that refresh at 50Hz normally, with some TVs that refresh at 100Hz. That just depends on the electricity in your country.
Although 4k TVs are becoming the norm, most content, such as from broadcast TV or cable TV, is still delivered in 720p and 1080p, or in some cases, 480p. This isn't an issue for most people, as these are standard resolutions that have evolved over the years and most modern TVs can display them properly. However, this becomes a problem when using the TV as a PC monitor, where 1440p is a very popular resolution for PC gaming. The reason for its popularity is because it's difficult to maintain a playable frame rate at 4k, even on high-end hardware, and dropping the resolution down to 1440p allows for smoother gameplay without sacrificing too much on image quality. This resolution is also important for console gaming, as the Microsoft Xbox Series S is targeting a 1440p resolution up to a 120 frames per second (fps) gaming experience. A TV that can display 120fps is beneficial for gaming, as a higher frame rate results in a smoother and more responsive experience. As for chroma 4:4:4, this is only important for text clarity when using the TV as a PC monitor; you can read more about it here.
If you want to connect an HD security camera to a TV, you need to use a BNC to HDMI converter. This setup is applicable to the following HD security cameras that use the same coax cable as analog CCTV cameras: AHD, HD-TVI, and HD-CVI, 720p through 4K resolution. 2b1af7f3a8