Video recording - Helical-scan digital component video cassette recording format using 12,65 mm magnetic tape and incorporating data compression (Format Digital-L) (IEC 61904:2000); German version EN 61904:2000— 76 стр.
Broadcast video tape recorders - Methods of measurement - Part 4: Analogue audio performance measurements (IEC 61237-4:1997); German version EN 61237-4:1997— 16 стр.