Video Mode Detection; Figure 87: Format Of Video Data Input Into Hdmi Tx Core - Analog Devices ADV8003 Hardware Manual

Function
vfe_input_id[3:0]
0000 
0001
0101
Component
Channel
Y
Bit 12-0
Cb Bit 12-0
Cr Bit 12-0

6.10.2. Video Mode Detection

The video mode detection feature can inform the user of the CEA-861 defined Video Identification Code (VIC) of the video being input
to the Tx core, as well as some additional formats. If a CEA 861 format is detected, the VIC is contained in vic_detected[5:0]. Some
additional non CEA 861 formats are contained in aux_vic_detected[2:0].
For some standards for which the VIC cannot be detected, the user needs to configure the following registers:
• The aspect ratio (set via the
is the only difference
• For 240p and 288p modes, the number of total lines can be selected in the
• The VIC detected is also affected by the pixel repetition (see Section
The detected VIC is sent in the AVI InfoFrames unless pixel repetition is applied to the video stream transmitted by the ADV8003. When
pixel repetition is applied to the video data, the VIC sent in the AVI InfoFrame may be different as the VIC is automatically determined by
the ADV8003. To override the VIC detection, the pixel repetition mode must be set to manual by setting
0b11. The desired VIC is then set. The Tx core can support non CEA 861 formats, but the VIC will not be automatically detected for these
formats. In this case, the VIC should manually be set to the value 0.
vic_detected[5:0], TX2 Main Map, Address 0xF43E[7:2] (Read Only)
This signal is used to readback the input video code (VIC) detected (refer to the CEA-861 specification).
aux_vic_detected[2:0], TX2 Main Map, Address 0xF43F[7:5] (Read Only)
This register returns the format of video inputs that have a resolution not defined in the CEA 861 specification.
Rev. B, August 2013
Description
RGB 444 or YCbCr 444
YCbCr 422
Pseudo 422 YCbCr
Pixel Pixel
0 1
G/Y
G/Y
1
0
B/Cb
B/Cb
1
0
R/Cr
R/Cr
1
0

Figure 87: Format of Video Data Input into HDMI Tx Core

aspect_ratio bit) is used to distinguish between CEA-861 video timing codes where the aspect ratio
Pixel Pixel
2 3
G/Y G/Y
2 3
B/Cb B/Cb
2 3
R/Cr R/Cr
2 3
progressive_mode_info[1:0]
5.7 for more details)
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ADV8003 Hardware Manual
...
Pixel
4
G/Y ...
4
...
B/Cb
4
R/Cr ...
4
field
pr_value_manual[1:0] to 0b10 or