What is the difference between P system and N system?

[Cathy]

The differences between P system and N system are as follows: 1. Different television standards represented: (1) P system: Records 25 frames per second, sometimes also referred to as the 625-line, 25 frames per second, interlaced scanning, PAL color-encoded television system. The PAL system has a resolution of 720*576, approximately 400,000 pixels. (2) N system: Records 30 frames per second, it belongs to the simultaneous system, with a frame rate of 29.97 (simplified as 30) per second, 525 scanning lines, progressive scanning, an aspect ratio of 4:3, and a resolution of 720x480. 2. Different global application ranges: (1) P system: Its standard is mainly applied in China, the Middle East, and Europe. (2) N system: Its standard is mainly applied in Japan, the United States, Canada, Mexico, etc.