television standard
Television standards are a classification of transmission and display characteristics used to transmit television signals from the television transmitter to the television receiver.
Television standards are specified and compiled by CCIR. The various television standards are reflected in the three dominant television standards for Phase Alternation Line( PAL), NTCS and SECAM.
The characteristics relevant to television standards are the transmission bands, the modulation methods and frequencies for picture, sound and chroma, and the scanning method whether interlaced or progressive scan with the number of frames and lines.
In the development of television standards, the historical developments of the various television standards play an essential role.