Movies Dictionary

Home -› Horizontal Scanning Frequency

Define!

Movies Dictionaries

Movie Scripts Dicitonary

Film and Video Dicitonary

Ally McBeal Dictionary

Pokemon Dicitonary

The 100% Simpsons Dictionary

Star Wars Dictionary

Vulcan to English Dictionary

English to Klingon Dictionary

Klingon to English Dictionary

English to Vulcan Dictionary

Other Resources

The Internet Movie Database

All Movie guide

Cinema.com

The Simpsons Archive

Star Trek Official Site

Vulcan Language Dictionary

Glossary of Film Terms

Pokemon Official Site

Definition Of:

Horizontal Scanning Frequency

Movies DictionaryFilm and Video Dicitonary
In the early days of black and white the horizontal scan rate was a multiple of the number of lines and pictures per second. There were 30 complete pictures per second and 525 lines per picture therefore the horizontal frequency was 30 x 525 or 15.750 KHz. The horizontal scan rate in our NTSC color system is derived from the color subcarrier. The formula is (3,579,545 Hz)(2/455) = 15,734.26 Hz. The horizontal frequency is expressed as 15.734 KHz. The factor of 2 used in the derivation puts the harmonics of the color information in-between the harmonics of the horizontal interval. That allows the use of a comb filter decoder in pulling color information out of the composite signal, while preserving some of the luminance information in that same frequency space. The factor of 455 was chosen in the original system design to put the color subcarrier frequency at a point low enough where it would not interfere with the audio carrier of a television transmitter, and yet high enough allow compatibility with existing black & white TV sets. Each complete horizontal line is 63.55 microseconds (.00006355 seconds) long. About 10.9 microseconds of that time is used for horizontal blanking, the time that the horizontal line is retraced from the right side back to the left. The color burst occupies 2.5 microseconds of that horizontal blanking interval.
See also: DFR , NELSON MUNTZ , Yadan , Ugau , LADDIE

 

Movies Dictionary INDEX:

List of Terms: Terms beginning with "A", Page 1

Starts With:      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9
Page Number:      1 2 3 4 5 6 7 8 9 10 11 12

A: Page 1 of 12.

A lens that adjus...A'rak
A'trom
A, An
A-Wind
A B Printing
A B Rolls
AAC
AAS
AC
ACC (Automatic Co...ADC
ADR
AERIAL SHOT
AEROSMITH
AES (Audio Engine...AFC (Automatic Fr...AFM
AGC
AGC (Automatic Ga...ALIENS
ANGLE ON
ANSI (American Na...APL (Average Pict...
APU NAHASAPEEMAPE...ASA
ATSC (Advanced Te...
ATTC (Advanced Te...Aargau
Abacus
Abaxial (bot., zo...Abbreviate
Abbreviation
Abcission
Abdomen
Aberrant
Ability
Ablactation
Ablation
Able
Ablepharia
Ablogenesis
Ablotic
Abnormal
Aborau
About
Above
Above the Line
Abra
Abrachia
Abrade
Abranchiate
Abrash
Abrasion
Abrasive (n.)
Abregado
Abrion sector
Abru'
Abru'le
Abru'mesukh
Abru-mal
Abru-tor
Abrunaf
Abruvenik
Abscess
Abscissa
Abscission (bot.)
Absent
Absolute
Absolute age
Absolute ceiling
Absolute converge...
Absolute humidity
Absolute magnitude
Absolute value
Absolute weight
Absolute zero
Absorb
Absorbent (n.)
Absorption
Absorption band
Absorption lines
Absorption spectrum
Abulau
Abundance
Abyss
Abyssal deposits
Abyssal-benthic z...Abyssopelagic
Acataphasia
Accelerate
Acceleration
Accelerator
Accelerometer
Accent Light
Accept
Accepted, to be
Access panel
Accident

Home   |   About Us   |   Contact Us
 
Copyright © 2008 Movies-Dictionary.org. All Rights Reserved.