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Jorge Campos
14-07-2006, 11:26
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For other meanings of "PAL" see PAL (disambiguation).
PAL, short for phase-alternating line, phase alternation by line or phase alternation line, is a colour encoding system used in broadcast television systems in large parts of the world. Other common analogue television systems are SECAM and NTSC. PAL was developed by Walter Bruch at Telefunken in Germany, and the format was first introduced in 1967. [1]

Telefunken was later bought by the French electronics manufacturer Thomson. Thomson also bought the Compagnie Generale de Télévision where Henri de France developed SECAM, historically the first European colour television standard. Thomson nowadays also co-owns the RCA brand for consumer electronics products, which created the NTSC colour TV standard before Thomson became involved.

The term "PAL" is often used informally to refer to a 625-line/50 Hz (principally European) television system, and to differentiate from a 525-line/60 Hz (principally North American/Central American/Japanese) "NTSC" system. Accordingly, DVDs are labelled as either "PAL" or "NTSC" (referring informally to the line count and frame rate) even though technically neither of them have encoded PAL or NTSC composite colour.