GS2961 Datasheet, PDF (57/104 Pages) Gennum Corporation – 3Gb/s, HD, SD SDI Receiver, with Integrated Adaptive Cable Equalizer complete with SMPTE Video Processing

Four registers are provided to allow the system to read the video standard information
from the device. These raster structure registers are provided in addition to the
VIDEO_FORMAT_352_A_X and VIDEO_FORMAT_352_B_X registers, and are updated
once per frame at the end of line 12.
The raster structure registers also contain three status bits: STD_LOCK, INT/PROG and
M. The STD_LOCK bit is set HIGH whenever the timing signal generator is fully
synchronized to the incoming standard, and detects it as one of the supported formats.
The INT/PROG bit is set HIGH if the detected video standard is interlaced and LOW if the
detected video standard is progressive. M is set HIGH if the clock frequency includes the
“1000/1001” factor denoting a 23.98, 29.97 or 59.94Hz frame rate.
The video standard code is reported in the VD_STD bits of the host interface register.
Table 4-11 describes the 5-bit codes for the recognized video standards.
Table 4-11: Supported Video Standard Codes
SMPTE Active Video Area
Standard
RATE_
DET[1]
HD/3G
RATE_
DET[0]
SD/HD
Lines
per Field
Active
Lines per
Field
425M (3G) 1920x1080/60 (1:1)
1
4:2:2
1920x1080/50 (1:1)
1
425M (3G) 1920x1080/60 (2:1) or
1
4:4:4
1920x1080/30 (PsF)
1920x1080/50 (2:1) or
1
1920x1080/25 (PsF)
1280x720/60 (1:1)
1
1280x720/50 (1:1)
1
1920x1080/30 (1:1)
1
1920x1080/25 (1:1)
1
1280x720/25 (1:1)
1
1920x1080/24 (1:1)
1
1280x720/24 (1:1)
1
260M (HD) 1920x1035/60 (2:1)
0
295M (HD) 1920x1080/50 (2:1)
0
0
1125
1080
0
1125
1080
0
1125
1080
0
1250
1080
0
750
720
0
750
720
0
1125
1080
0
1125
1080
0
750
720
0
1125
1080
0
750
720
0
1125
1035
0
1250
1080
Words
per
Active
Line
1920
1920
3840
3840
2560
2560
3840
3840
2560
3840
2560
1920
1920
Words VD_STD
per Line
[5:0]
2200
2Bh
2640
2Dh
4400
2Ah
5280
2Ch
3300
20h
3960
24h
4400
2Bh
5280
2Dh
7920
26h
5500
30h
8250
28h
2200
15h
2376
14h
GS2961 3Gb/s, HD, SD SDI Receiver, with Integrated
Adaptive Cable Equalizer
Data Sheet
48004 - 2
November 2009
57 of 104