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Definition of "phase alternate line (PAL)" |
a color television system that inverts the (R-Y) color signal on alternate lines. The color burst is located on the back porch of the composite video signal and the phase alternates every line for identification of the (R-Y) difference signal phase. The color demodulator uses the shift in the color burst phase and the (R-Y) phase reversals to eliminate any hue changes caused by phase errors. The PAL color demodulation method eliminates the tint control but does cause desaturated colors. The vertical scan parameters for the PAL television system are based on the European power line frequency of 50 Hz. The different PAL standards in existence in different countries allow for a slightly wider video bandwidth. The primary PAL system parameters (with the allowed bandwidth variance) are |
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