What Does Phase Alternating Line (PAL) Mean?
Phase Alternating Line (PAL) is a color encoding system for analog television, and was created in 1961 in the United Kingdom. It features 624 horizontal lines per frame with a rate of 25 frames per second. PAL is used in broadcast television systems in many countries and is one of the three major broadcast standards, along with the NTSC and SECAM systems.
Techopedia Explains Phase Alternating Line (PAL)
Similar to the NTSC system, Phase Alternating Line makes use of a quadrature amplitude modulated subcarrier which carries the chrominance data added to the video signal. The frequency for PAL is 4.43361875 MHz, while it is 3.579545 MHz for NTSC. PAL scans the cathode ray tube 625 times horizontally to form the video image. This is similar to the SECAM system. PAL makes use of a screen resolution of 720 × 576 pixels. PAL video can be converted to NTSC with the addition of extra frames. This can be done with techniques such as adaptive motion interpolation or inter-field interpolation.
