WHAT IS NTSC AND PAL STANDARD?
Although VHS video format is the same throughout the World, the video standard or electronic signal that is recorded on the cassette varies from country to country. The two most common video standards used are NTSC and PAL.
NTSC is the video system or standard used in North America and most of South America. In NTSC, 30 frames are transmitted each second. Each frame is made up of 525 individual scan lines.
PAL is the predominant video system or standard mostly used overseas. In PAL, 25 frames are transmitted each second. Each frame is made up of 625 individual scan lines.
There are other format as follows:
NTSC: National Television System Committee. Developed in the USA, also used by other countries. Utilizing the USA power net 60Hz as refreshing frequency
PAL: Phase Alternation Line. Developed in Germany, also used by other countries. Utilizing the European power net 50Hz as refreshing frequency.
SECAM: Sequential Couleur Avec Memoire. Developed in France also used by other countries. Utilizing the European power net 50Hz as refreshing frequency.
MESECAM: Mediterranean SECAM, a SECAM sub-standard developed for use in the Middle East and still used by a few countries. TV reception and playback may be viewed with both PAL and SECAM TV sets.
PAL-60: A substandard of PAL used by some countries, utilizing 60Hz instead of 50Hz refreshing frequency.
NTSC 4.43: An NTSC substandard. Most modern playback machines are dual mode and will switch automatically between versions 3.XX and 4.XX. Older machines may require manual switching or an additional external converter.
Here is a list of the countries and there popular formats:
DVD – Region Codes
- Canada, United States, and U.S. territories
- Japan, Middle East, South Africa, Western Europe
- East Asia, Southeast Asia
- Australia, Caribbean islands, Central America, Mexico, New Zealand, Pacific Islands, South America
- Africa, Eastern Europe, India, Mongolia, North Korea
- Special international venues (airplanes, cruise ships, and so forth)
How is the region code set?
The first time you insert a DVD disc in Mac OS X v10.3 or later:
- If the disc only supports one region, the DVD drive is set to that region. No dialog box appears if you are logged in as an admin user. This will automatically count against the number of times you can change the region setting (see below).
- If the disc supports more than one region, or is region-free, the below dialog appears asking you to choose a region for your DVD drive.
If you later insert a DVD that uses a different region, the above dialog will appear.
You can change the region setting up to 5 times, as indicated in the dialog box. On the fifth time, the drive is permanently set to use that region, and you cannot make any more changes. For example, imagine you have both a Region 1 and Region 2 DVD-Video disc. You insert the Region 1 disc and DVD Player is now set to play only Region 1 discs. You insert the Region 2 disc, and set the drive to play only Region 2 discs. If you continue to switch between the discs, on the fifth time the DVD drive is permanently set to use the region of that disc.
Discs with the region byte set to all zeros (sometimes called Region 0) can be played in any part of the world. Region 0 DVD-Video discs, such as those created by iDVD, do not have a geographical boundary. However, your DVD player and television must be compatible with the video standard used to record the movie on the disc. You should be able to play any Region 0 DVD disc with the DVD Player application since it is compatible with these video standards.
DVD players are generally limited to playing discs of only one region—usually the region where the DVD player was purchased. For example, DVD players purchased in Canada usually only play Region 1 DVD-Video discs.
This blog is inspired by Amy Maria https://www.facebook.com/amy.maria.965