As we mentioned earlier, the standard for measuring image clarity is resolution. The so-called high-definition resolution must reach megapixels or 720p. So what is the difference between megapixels and 720p?
720p is derived from the HDTV standard established by the American Society of Motion Picture and Television Engineers (SMPTE). According to this standard, there are mainly three formats that truly conform to high-definition video:
l 720p: 1280 * 720 resolution, 16: 9 widescreen display, progressive scan / 60Hz
l 1080i: 1920 * 1080 resolution, 16: 9 widescreen display, interlaced scanning / 60Hz
l 1080p: 1920 * 1080 resolution, 16: 9 widescreen display, progressive scan / 60Hz
In addition, the standard also defines the frame rate and other data corresponding to each resolution in detail. Therefore, a high-definition network camera that meets any given HDTV standard must support one or more specific resolutions, frame rates, and color fidelity, thereby always ensuring the specified video quality.
Megapixels are not an accepted standard, they are merely concepts that represent an industry best practice, specifically referring to the number of image sensor elements of network cameras. That is to say, when we hear a high-definition network camera saying that it supports megapixels, two megapixels or five megapixels, we do n’t know what the frame rate of this camera is, what the video aspect ratio is, interlaced or progressive Line, color fidelity, etc., and this information is also an important reference for measuring the performance of a high-definition network camera.
Therefore, high-definition network cameras that meet the HDTV 720p / 1080i / 1080p standards will undoubtedly become mainstream.
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