Color frame – Grass Valley 8964ENC v.1.2.2 User Manual
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8964ENC/-FS — Instruction Manual
Configuration
Color Frame
When converting from a SDI input signal to NTSC or PAL output, a color
frame is chosen by the 8964ENC module based on the position of the closest
SDI Field 1 to Field 1 of the reference input. NTSC video has a 4-field color
frame sequence, while PAL has an 8-field sequence. SDI video coming into
the module has a 2-field sequence.
As illustrated in the three examples in
for a 525 reference input, the
relationship of the SDI input Field 1 to the reference input Field 1 will deter-
mine the color frame of the encoder video output.
Note
When the SDI video is delayed one field, the color frame jumps back two
fields to the closest Field 1.
Figure 8. Color Frame Output (NTSC)
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8209_10
Reference Input
Reference Input
Reference Input
SDI Input
Encoder Output
SDI Input
Encoder Output
SDI Input
Encoder Output
4-Field Sequence
4-Field Sequence
4-Field Sequence
2-Field Sequence
4-Field Sequence