MacroVision
MacroVison Demo Tape Intro
MacroVison was, a primitive contrasting block scrambler method using the left bottom and VBI space above line 21.
Intended to mess with automatic gain control systems, this was ignored by most low level and commercial TBCs however and of course ignored by the sync code of vhs-decode in most cases, but for VCR to VCR dubbing of tapes in the 1980s and 1990s this made no end of issues for people wanting to duplicate there home movies or commercial tapes.
Clean 4fsc Frame
CVBS Raster with MacroVison contrast blocks
- FAQ - Frequently Asked Questions
- Diagram Breakdowns
- Visual-Comparisons
- VCR Reports / RF Tap Examples
- Download & Contribute Data
- Speed Testing
- Visual VBI Data Guide
- Closed Captioning
- Teletext
- WSS Wide - Screen Signalling
- VITC Timecode
- VITS Signals
- XDS Data (PBS)
- Video ID IEC 61880
- Vapoursynth TBC Median Stacking Guide
- Ruxpin-Decode & TV Teddy Tapes
- Tony's GNU Radio For Dummies Guide
- Tony's GNU Radio Scripts
- DomesDay Duplicator Utilities
- ld-decode Utilities