PAL (UK – Phase Alteration Line) - PAL is the predominant video system or standard mostly used overseas. In PAL, 25 frames are transmitted each second. Each frame is made up of 625 individual scan lines. Regions which use PAL are Afghanistan, Australia, Belgium, China, Germany, Hong Kong, South Africa and the United Kingdom. People in the States may notice the slight flicker of a PAL video, having become used to the higher frame rate of NTSC, PAL offers noticeably improved resolution and color stability. After several minutes of viewing a PAL video, our brains compensate, and the flicker becomes un-noticeable.
NTSC (America – National Television Standards Committee) - NTSC is the video system or standard used in North America and most of South America. In NTSC, 30 frames are transmitted each second. Each frame is made up of 525 individual scan lines. NTSC has a lower resolution than PAL or SECAM but a faster frame rate, which reduces flicker.
SECAM (French - Sequental Color With Memory) - SECAM, SECAM aussi Written Which stands for Sequential Color Memory, French for "Sequential Color with Memory". SECAM WAS Developed in France and is Used in France and Its territories, much of Eastern Europe, Russia, the Middle East and northern Africa. This system uses the Sami resolution of PAL, 625 lines, and frame rate, 25 per second, the goal SECAM Processes way the color information is not compatible with PAL.
No comments:
Post a Comment