Traditional Culture Encyclopedia - Photography and portraiture - Difference between pixels 700tvl and 720P of Haikang camera

Difference between pixels 700tvl and 720P of Haikang camera

1, which have different definitions:

700TVL is the index of analog camera definition, and 720P is the index of network camera.

2, the clarity is different:

The resolution of 720P is much higher than that of 720TVL.

700TVL represents the pixel index of an analog camera, which is about 400,000 pixels.

720P represents that the pixel index of digital network camera is about 654.38+0 million pixels.

Extended data:

The unit of TVL is "TVLine", also called Line. It means that from the horizontal direction, it is equivalent to erecting each scanning line and multiplying it by 4/3 (aspect ratio) to form a horizontal bus, which is called horizontal resolution. Because of its small file size, it has been widely used in the field of surveillance cameras.

1080i and 720p are internationally recognized standards for digital HDTV. The original NTSC countries adopted the format of 1080i/60Hz, which is the same as the field frequency of NTSC analog TV. While some countries adopting PAL system, such as Europe and China, adopt 1080i/50Hz mode, and the field frequency is the same as PAL analog TV. As for 720p, IT has become an optional standard due to the deeper penetration of IT vendors into the TV industry.

References:

Baidu encyclopedia -tvl

Baidu encyclopedia -720P