Mode 8 - Analog Devices ADV8005 Hardware Reference Manual

ADV8005 Hardware Reference Manual
2.1.9.

Mode 8

Mode 8 should be used if:
•
HDMI input video is copy protected
•
Additional processing is required on the new output formats
•
OSD is required on multiple outputs
•
OSD and video scaling are to be kept separate
OSD rendered at a single set resolution: 720p OSD rendered at a single set resolution: 720p
Input Input
Exosd Exosd
Muxing Muxing
24-bit 24-bit
Input Input
Port Port
Video Video
36-bit 36-bit
Input Input
Port Port
720p Video 720p Video
Serial Serial
from from
Video Video
Transceiver Transceiver
RX RX
Mode 8 is similar to mode 7 in that OSD is not overlaid on the input video but rather output as the OSD video on its own. This may be required
when HDMI video from an upstream IC is copy protected (as in
In this mode, the input format is 720p from an external video transceiver and passed to the OSD blend. As the OSD is generated at the same
resolution as the input video, they are just blended. This is then passed to the PVSP where it is upscaled and sent to both HDMI transmitters. If
this data is copy protected, this cannot be passed to the analog outputs. The OSD on its own, however, can be passed directly to these outputs.
In the example in Figure 18, the OSD is scaled down to 480p and passed through the PtoI block and sent out on the SD encoder. The difference
between mode 7 and mode 8 is very similar to the difference between modes 2 and 4. Ideally the video and OSD should be scaled separately and
then blended.
Mode 8 Mode 8
DDR2 Memory DDR2 Memory
Interface Interface
Build Build Scale Scale
(720p) (720p)
OSD OSD OSD OSD
Video Video
Muxing Muxing
Secondary: Secondary:
Data Data
Formatting Formatting
& CSC & CSC
Primary: Primary:
Data Data
Formatting, Formatting,
CSC & ACE CSC & ACE
RX: RX:
(720p) (720p)
Data Data
Formatting Formatting
& CSC & CSC
Figure 18:
Primary Primary
OSD OSD
VSP VSP
Blend Blend
(720p) (720p)
OSD OSD
Secondary Secondary
Data Data
VSP VSP
(480p) (480p)
Only Only
ADV8005 Mode 8 Configuration
Figure 18), but the OSD is still required on the analog outputs.
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Output Output
Muxing Muxing
(1080p) (1080p)
Progressive to Progressive to (480i) (480i)
Interlaced Interlaced
UG-707
HDMI HDMI
Tx1 Tx1
1080p(OSD) 1080p(OSD)
HDMI HDMI
Tx2 Tx2
1080p(OSD) 1080p(OSD)
HD HD
Encoder Encoder
SD SD
Encoder Encoder
480i(OSD Only) 480i(OSD Only)