Frequencies(3pm)					User Contributed Perl Documentation					  Frequencies(3pm)

NAME

       Video::Frequencies - Many, many frequency constants and lists.

SYNOPSIS

	  use Video::Frequencies;

	  while (my($name,$list) = each %CHANLIST) {
	     print "$name
";
	     while (my($channel,$freq) = each %$list) {
		printf "   %-4s %9d
", $channel, $freq;
	     }
	     print "
";
	  }

DESCRIPTION

       This module exports (yes, exports!) frequency constants as well as hashes with channel => frequency relations for digital and analog video
       and audio broadcast. Another, shorter way to put it is "worldwide channel/frequency list". All frequencies are given in kHz.

       It's a good idea to use "perldoc -m Video::Frequencies" to get an idea on how the various constants and lists look like.

Exported Audio Carrier Frequencies
	  NTSC_AUDIO_CARRIER
	  PAL_AUDIO_CARRIER_I
	  PAL_AUDIO_CARRIER_BGHN
	  PAL_AUDIO_CARRIER_MN
	  PAL_AUDIO_CARRIER_D
	  SEACAM_AUDIO_DKK1L
	  SEACAM_AUDIO_BG
	  NICAM728_PAL_BGH
	  NICAM728_PAL_I

       NICAM 728 32-kHz, 14-bit digital stereo audio is transmitted in 1ms frames containing 8 bits frame sync, 5 bits control, 11 bits additional
       data, and 704 bits audio data. The bit rate is reduced by transmitting only 10 bits plus parity of each 14 bit sample, the largest sample
       in a frame determines which 10 bits are transmitted. The parity bits for audio samples also specify the scaling factor used for that
       channel during that frame. The companded audio data is interleaved to reduce the influence of dropouts and the whole frame except for sync
       bits is scrambled for spectrum shaping. Data is modulated using QPSK, at below following subcarrier freqs

Broadcast Format by Country
       (M) NTSC
	   Antigua, Aruba, Bahamas, Barbados, Belize, Bermuda, Bolivia, Burma, Canada, Chile, Colombia, Costa Rica, Cuba, Curacao, Dominican
	   Republic, Ecuador, El Salvador, Guam Guatemala, Honduras, Jamaica, Japan, South Korea, Mexico, Montserrat, Myanmar, Nicaragua, Panama,
	   Peru, Philippines, Puerto Rico, St Christopher and Nevis, Samoa, Suriname, Taiwan, Trinidad/Tobago, United States, Venezuela, Virgin
	   Islands

       (B) PAL
	   Albania, Algeria, Australia, Austria, Bahrain, Bangladesh, Belgium, Bosnia-Herzegovinia, Brunei Darussalam, Cambodia, Cameroon,
	   Croatia, Cyprus, Denmark, Egypt, Ethiopia, Equatorial Guinea, Finland, Germany, Ghana, Gibraltar, Greenland, Iceland, India, Indonesia,
	   Israel, Italy, Jordan, Kenya, Kuwait, Liberia, Libya, Luxembourg, Malaysa, Maldives, Malta, Nepal, Netherlands, New Zeland, Nigeria,
	   Norway, Oman, Pakistan, Papua New Guinea, Portugal, Qatar, Sao Tome and Principe, Saudi Arabia, Seychelles, Sierra Leone, Singapore,
	   Slovenia, Somali, Spain, Sri Lanka, Sudan, Swaziland, Sweden, Switzeland, Syria, Thailand, Tunisia, Turkey, Uganda, United Arab
	   Emirates, Yemen

       (N) PAL
	   Argentina (Combination N), Paraguay, Uruguay

       (M) PAL (525/60, 3.57MHz burst)
	   Brazil

       (G) PAL
	   Albania, Algeria, Austria, Bahrain, Bosnia/Herzegovinia, Cambodia, Cameroon, Croatia, Cyprus, Denmark, Egypt, Ethiopia, Equatorial
	   Guinea, Finland, Germany, Gibraltar, Greenland, Iceland, Israel, Italy, Jordan, Kenya, Kuwait, Liberia, Libya, Luxembourg, Malaysia,
	   Monaco, Mozambique, Netherlands, New Zealand, Norway, Oman, Pakistan, Papa New Guinea, Portugal, Qatar, Romania, Sierra Leone,
	   Singapore, Slovenia, Somalia, Spain, Sri Lanka, Sudan, Swaziland, Sweeden, Switzerland, Syria, Thailand, Tunisia, Turkey, United Arab
	   Emirates, Yemen, Zambia, Zimbabwe

       (D) PAL
	   China, North Korea, Romania, Czech Republic

       (H) PAL
	   Belgium

       (I) PAL
	   Angola, Botswana, Gambia, Guinea-Bissau, Hong Kong, Ireland, Lesotho, Malawi, Nambia, Nigeria, South Africa, Tanzania, United Kingdom,
	   Zanzibar

       (B) SECAM
	   Djibouti, Greece, Iran, Iraq, Lebanon, Mali, Mauritania, Mauritus, Morocco

       (D) SECAM
	   Afghanistan, Armenia, Azerbaijan, Belarus, Bulgaria, Estonia, Georgia, Hungary, Zazakhstan, Lithuania, Mongolia, Moldova, Poland,
	   Russia, Slovak Republic, Ukraine, Vietnam

       (G) SECAM
	   Greece, Iran, Iraq, Mali, Mauritus, Morocco, Saudi Arabia

       (K) SECAM
	   Armenia, Azerbaijan, Bulgaria, Estonia, Georgia, Hungary, Kazakhstan, Lithuania, Madagascar, Moldova, Poland, Russia, Slovak Republic,
	   Ukraine, Vietnam

       (K1) SECAM
	   Benin, Burkina Faso, Burundi, Chad, Cape Verde, Central African Republic, Comoros, Congo, Gabon, Madagascar, Niger, Rwanda, Senegal,
	   Togo, Zaire

       (L) SECAM
	   France

Channel->;Frequency Relations
       The Channel->Frequency relations are stored in the following hashes. The keys are the Channel names, the values are the corresponding
       frequency in kHz. For example, "arte" is channel "SE6" in the town in Germany I live in, so, consequently, $PAL_EUROPE{SE6} equals 140250,
       the frequency I have to tune my receiver.

	  US broadcast		%NTSC_BCAST
	  US cable		%NTSC_CABLE
	  US HRC		%NTSC_HRC
	  JP broadcast		%NTSC_BCAST_JP
	  JP cable		%NTSC_CABLE_JP
	  Australia		%PAL_AUSTRALIA
	  Europe		%PAL_EUROPE
	  Europe East		%PAL_EUROPE_EAST
	  Italy 		%PAL_ITALY
	  Ireland		%PAL_IRELAND
	  Newzealand		%PAL_NEWZEALAND

	  CCIR frequencies	%FREQ_CCIR_I_III
				%FREQ_CCIR_SL_SH
				%FREQ_CCIR_H
	  OIRT frequencies	%FREQ_OIRT_I_III
				%FREQ_OIRT_SL_SH
				%FREQ_UHF

The List of Lists
       The hash %CHANLIST contains name => channel-list pairs, e.g.  $CHANLIST{"ntsc-bcast"} contains a reference to %NTSC_BCAST.

AUTHOR

       Nathan Laredo (laredo@broked.net), adapted to perl by Marc Lehmann <schmorp@schmorp.de>

perl v5.14.2							    2005-03-03							  Frequencies(3pm)