What is the difference between NTSC, PAL, SECAM?

By cavsi Category: NTSC PAL SECAM Tags:

There are 3 main analog video standards in use around the world.

PAL (Phase Alternating Line)
NTSC (National Television System Committee)
SECAM (Séquentiel couleur à mémoire – Sequential Color with Memory)

Each standard is incompatible with the other two. Also, the equipment that demodulates the signal must be formatted for that signal.

Generally NTSC is used in North America, most of the countries in South America and Japan. PAL is the format for the UK and most European countries except France and parts of Eastern Europe which use SECAM. For example, a recording made in the France could not be played on an American VCR.

If you view video tapes that are from outside of the United States, or send videos abroad, you must first convert the tape to or from the foreign television standard.

This table illustrates the differences between the video standards:

PAL B,G,H

PAL I

PAL N

PAL M

Lines/Fields625/50625/50625/50525/60
Horizontal Frequency15.625 kHz15.625 kHz15.625 kHz15.750 kHz
Vertical Frequency50 Hz50 Hz50 Hz60 Hz
Color Subcarrier Frequency4.433 MHz4.433 MHz3.582 MHz3.575 MHz
Video Bandwidth5.0 MHz5.5 MHz4.2 MHz4.2 MHz
Sound Carrier5.5 MHz5.9996 MHz4.5 MHz4.5 MHz

 

NTSC M

SECAM B,G,H

SECAM D,K,K’,L

Lines/Fields525/60625/50625/50
Horizontal Frequency15.734 kHz15.625 kHz15.625 kHz
Vertical Frequency60 Hz50 Hz50 Hz
Color Subcarrier Frequency3.579545 MHz
Video Bandwidth4.2 MHz5.0 MHz6.0 MHz
Sound Carrier4.5 MHz5.5 MHz6.5 MHz
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