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VIDEO STANDARDS AND SPECIFICATIONS

As you may or may not be aware, the world has three main television broadcast standards and depending on which country you live in, you're familiar with at least one of them. In no particular order they are SECAM, PAL and NTSC. The problem is that none of the three are compatible. Nature Library shoots and their footage in the NTSC format.

The three charts below give specific technical breakdown for each standard.


NTSC

The first colour TV broadcast system was implemented in the United States in 1953.
This was based on the NTSC ( N ational T elevision S ystem C ommittee) standard.
NTSC is used by the US, Canada, Japan and others. NTSC runs on 525 lines/frame.

SYSTEM (spec) NTSC M
Lines/Field 525/60
Horizantal Frequency 15.734 kHz
Vertical Frequency 60 Hz
Colour Subcarrier Frequency 3.579545 mHz
Video Bandwidth 4.2 mHz
Sound Carrier 4.5 mHz



PAL

The PAL (Phase Alternating Line) standard was introduced in the early 1960's and
implemented in most countries except for France.European The PAL standard utilises a wider
channel bandwidth than NTSC which allows for better picture quality. PAL runs on 625 lines/frame.

SYSTEM PAL B,G,H PAL I PAL D PAL N PAL M
Line/Field 625/50 625/50 625/50 625/50 525/60
Horizontal Frequency 15.625 kHz 15.625 kHz 15.625 kHz 15.625 kHz 15.750 kHz
Vertical Frequency 50 Hz 50 Hz 50 Hz 50 Hz 60 Hz
Colour Sub Carrier Frequency 4.433618 MHz 4.433618 MHz 4.433618 MHz 3.582056 MHz 3.575611 MHz
Video Bandwidth 5.0 MHz 5.5 MHz 6.0 MHz 4.2 MHz 4.2 MHz
Sound Carrier 5.5 MHz 6.0 MHz 6.5 MHz 4.5 MHz 4.5 MHz


SECAM

SECAM ( S equential C ouleur A vec M emoire or S equential C olour with M emory) was
introduced in the early 1960's and implemented in France. SECAM uses the same bandwidth as
PAL but transmits the color information sequentially. SECAM runs on 625 lines/frame.

SYSTEM SECAM B,G,H SECAM D,K,K1,L
Line/Field 625/50 625/50
Horizontal Frequency 15.625 kHz 15.625 kHz
Vertical Frequency 50 Hz 50 Hz
Video Bandwidth 5.0 MHz 6.0 MHz
Sound Carrier 5.5 MHz 6.5 MHz




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