Photographic system

At present, color TV broadcasting systems in the world are mainly divided into two categories.

First of all, different TV standards represent.

P system (PAL): A television system that records 25 pictures per second, sometimes referring to 625 lines, 25 frames per second, interlaced scanning and PAL color coding. The picture resolution of PAL system is 720*576, about 400,000 pixels.

N-system (NTSC): 30 recordings per second, belonging to the simultaneous interpretation system. The frame rate is 29.97 per second (simplified to 30), the scanning line is 525, the picture ratio is 4:3, and the resolution is 720X480.

Differences in global scope of application

System P: Its standards are mainly used in China, the Middle East and Europe.

N system: its standards are mainly used in Japan, the United States, Canada, Mexico and so on.

So PAL system and NTSC system are incompatible with each other. If you play the influence of NTSC on PAL TV, the picture will become black and white, and so will NTSC TV. As a video shooting tool, digital camera also has system problems. For example, China uses PAL system, and all digital cameras sold in China are PAL system. If it is NTSC, the images taken by the camera cannot be played normally on PAL TV.

Therefore, in the choice of acquisition card, if it is domestic equipment, PAL system will do. If it is imported equipment, it depends on which system the equipment belongs to.