72 hdtv
Video standards converter
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Video standards converter is a video device that converts NTSC to PAL and/or PAL to NTSC.
The PAL TV signals may be transcoded to or from SECAM.
Video standards converter is used so TV shows can be viewed in nations with different video standards.
Main Page see Television standards conversion
History
Converters are needed because NTSC uses 30 frames (pictures) per second and PAL uses 25 frames per second. First video standards converters were Analog. That is a special Professional video camera that used a Video camera tube would be pointed at a Cathode ray tube video monitor. Both the Camera and the monitor could be switched to either NTSC or PAL, to convert both ways. Robert Bosch GmbH's Fernseh Division made a large three rack analog video standards converter. These were the high end converters of the 1960s and 1970s. Image Transform in Universal City, CA used the Fernseh converter and in the 1980s made their own a custom digital converter. This was also a larger 3 rack device. As digital memory size became larger in smaller packages converters became the size of a microwave oven. Today one can buy a very small converter for home use!
See also
Scan conversion
NTSC
PAL
SECAM
Television standards conversion
Ext. Link
- Web site
- Video standards
v?d?eBroadcast video formats
Television
Analog
525 lines
NTSC NTSC-J PAL-M
625 lines
PAL PAL-N/NC PALplus SECAM
Audio
BTSC (MTS) NICAM-728 Zweiton (A2/ IGR) EIAJ SAP
Hidden signals
Captioning Teletext CGMS-A GCR PDC VBI VEIL VITC WSS XDS
Defunct systems
Pre-1940 Baird-Nipkow 180 lines 405 lines 441 lines 819 lines MAC MUSE
Digital
Interlaced
SDTV (480i 576i) HDTV (1080i)
Progressive
LDTV (240p 288p 1seg) EDTV (480p 576p) HDTV (720p 1080p)
MPEG-2 standards
ATSC DVB ISDB DMB-T/H
MPEG-4 AVC standards
ATSC 2.0 (A/72) DMB DMB-T/H DVB SBTVD 1seg
Audio
AC-3 (5.1) MPEG Multichannel PCM LPCM AAC
Hidden signals
Captioning Teletext CPCM Broadcast flag AFD EPG
Digital cinema
Super Hi-Vision (2540p 4320p) DCI
Technical issues
14:9 compromise MPEG transport Reverse Standards Conversion Standards conversion Video processing Video on demand HDTV blur
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