IEC 61880:1998 pdf download – Video systems (525/60)- video and accompanied data using the vertical blanking interval – Analogue interface

IEC 61880:1998 pdf download – Video systems (525/60)- video and accompanied data using the vertical blanking interval – Analogue interface.
IEC 61880 is applicable to the transfer of video related information with the video signal through the baseband analogue signal of the 525-llne,’&O•fleld video system.
This sandard is applicable to analogue video signal interfaces between digital and analogue
video equipment as follows:
— digital video equipment to digital video equipment:
— digital vedeo equipment to analogue video equipment;
— analogue video equipment to digital video equipment;
— analogue video equipment to analogue video equipment.
This standard specifies the aspect ratio code and the copy control Information code and the method of transfer of these codes in the vertical blanking interval of the luminance signal
2 Definitions and abbreviations
For the purpose of this International Standard the following definitions and abbreviations apply.
2.1
CRCC
cyclic redundancy check code for error detection
2.2
CGMS-A
copy generation management system on analogue video interlace, for use in digital video recorders and players
2.3
APS
analogue protection system, to control analogue copying from digital transmissions or from digital copies of a video signal
2.4
pseudo-sync pulse APS (PSP system)
one element of APS which was designed to operate on analogue video cassette recorders and
which utilizes certain types of automatic gain control circuitry to keep the video Input signal at a fixed predetermined level with respect to a reference
The CRCC is generated In successive steps as follows:
1) SI is closed, and S2 is set to position a.
2) 14 bits data are input from the beginning;
3) Si Is opened, S2 set to position b, and CRCC is output horn 15.b,t data.
5 TransmissIon field
The same data shall be carried for two fields continuously.
6 Designation
The equipment which deals with the data of this standard shall use the designation ID-2. The name of this information system is defined as VIDEO ID.