Fixing a few links to SMPTE standards
Some links have gone 404 and also might have been added earlier, before SMPTE last year started to have many stuff available without the paywall.
Signed-off-by: Ingmar Rieger git@irieger.net
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Some links have gone 404 and also might have been added earlier, before SMPTE last year started to have many stuff available without the paywall.
Signed-off-by: Ingmar Rieger git@irieger.net