UG-707
ADV8005 Hardware Reference Manual
2.1.8.
Mode 7
Mode 7 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
Figure 17:
Mode 7 Configuration
Mode 7 is different to other modes in that OSD is not overlaid on video data on certain outputs but rather just output on its own. In certain cases
where HDMI video from an upstream IC is copy protected, video data can be output on HDMI outputs but not analog outputs. However, OSD
data can still be displayed on analog output, for example, to indicate system status or to recover the system from an error-like state.
In this mode, the input format is 720p from an external video transceiver (this could also come from the Video TTL input if video is from an
upstream HDMI IC) and is passed to the PVSP. This is upscaled, blended with the 1080p OSD data and sent to both HDMI transmitters. Because
this may be 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
, the OSD is scaled down to 480p and passed to the HD encoder.
OSD
Blend
Build
OSD
Scale
OSD
Secondary
VSP
Output
Muxing
Mode 7
DDR2 Memory
Interface
OSD rendered at a single set resolution: 720p
(720p)
(1080p)
(1080p)
1080p(OSD)
480p(OSD only)
1080p(OSD)
(480p)
OSD
Data
Only
(1080p)
Primary
VSP
HDMI
Tx2
HDMI
Tx1
HD
Encoder
SD
Encoder
720p Video
from
Transceiver
(720p)
Video
36-bit
Input
Port
Exosd
24-bit
Input
Port
Serial
Video
Rx
Input
Muxing
Secondary:
Data
Formatting
& CSC
Primary:
Data
Formatting,
CSC & ACE
RX:
Data
Formatting
& CSC
Video
Muxing
OSD
Blend
Build
OSD
Scale
OSD
Secondary
VSP
Output
Muxing
Mode 7
DDR2 Memory
Interface
OSD rendered at a single set resolution: 720p
(720p)
(1080p)
(1080p)
1080p(OSD)
480p(OSD only)
1080p(OSD)
(480p)
OSD
Data
Only
(1080p)
Primary
VSP
HDMI
Tx2
HDMI
Tx1
HD
Encoder
SD
Encoder
720p Video
from
Transceiver
(720p)
Video
36-bit
Input
Port
Exosd
24-bit
Input
Port
Serial
Video
Rx
Input
Muxing
Secondary:
Data
Formatting
& CSC
Primary:
Data
Formatting,
CSC & ACE
RX:
Data
Formatting
& CSC
Video
Muxing
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