Grass Valley MRC v.1.2 - Manual (Page 158)

148
Tutorials
Video Fields and Frames
• 720p/59.94 Tri-Level Reference (no software configuration)
SD 525/59.94 will switch, but not correctly.
In summary, the switch points for the odd and even fields of SD are not the same time rela-
tive to the start of a 720p frame. There is a 50% chance the switch will occur at the correct
point in time. The other 50% chance is that the switch will occur about 2/3 of a line early.
HD 720p/59.94 will switch correctly.
HD 1080p/59.94 will switch, but not at the correct time.
HD 1080i/59.94 will switch, but not at the correct time.
All other standards will switch, but not at the correct time.
• 1080i/50 Tri-Level Reference (no software configuration)
SD 625/50 will switch correctly.
HD 1080i/50 will switch correctly.
HD 1080p/50 will switch, but not at the correct time.
HD 720p/50 will switch, but not at the correct time.
All other standards will switch, but not at the correct time.
• 1080p/50 Tri-Level Reference (no software configuration)
SD 625/50 will switch, but not correctly.
In summary, the switch points for the odd and even fields of SD are not the same time rela-
tive to the start of a 720p frame. There is a 50% chance the switch will occur at the correct
point in time.
HD 1080p/50 will switch correctly.
HD 1080i/50 will switch, but not at the correct time.
HD 720p/50 will switch, but not at the correct time.
All other standards will switch, but not at the correct time.
• 720p/50 Tri-Level Reference (no software configuration)
SD 625/50 will switch, but NOT correctly.
In summary, the switch points for the odd and even fields of SD are not the same time rela-
tive to the start of a 720p frame. There is a 50% chance the switch will occur at the correct
point in time. The other 50% chance is that the switch will occur about 2/3 of a line early.
HD 720p/50 will switch correctly.
HD 1080p/50 will switch, but not at the correct time
HD 1080i/50 will switch, but not at the correct time
All other standards will switch, but not at the correct time.
• 1080p/24 Tri-Level Reference (no software configuration)
All SD formats will switch, but not at the correct time.
There are no SD formats that frame-align with a 24Hz frame reference, so it is impossible to
guarantee an SD signal will switch at the correct point in time.
HD 1080p/24 will switch correctly.
All other HD standards will switch, but not at the correct time.