ADV8003 Hardware Manual
Rev. B, August 2013
73
2.1.3.
Mode 2
Mode 2 should be used if:
•
Three separate output formats are required
•
Additional processing (BNR, RNR, and so on) is required on the new output formats
•
OSD is required on multiple outputs
•
OSD and video scaling are to be kept separate
OSD
Blend
Build
OSD
Scale
OSD
Secondary
VSP
Output
Muxing
Mode 2
DDR2 Memory
Interface
OSD rendered at a single set resolution: 720p
(720p)
(1080p)
(1080p)
1080p(OSD)
720p(OSD)
1080i(OSD)
Progressive to
Interlaced
(1080i)
(1080p)
(720p)
(480i)
480i
Primary
VSP
HDMI
Tx2
HDMI
Tx1
HD
Encoder
SD
Encoder
Video
36-bit
Input
Port
Exosd
24-bit
Input
Port
Serial
Video
RX
480i Video
from
Decoder
(480i)
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 2
DDR2 Memory
Interface
OSD rendered at a single set resolution: 720p
(720p)
(1080p)
(1080p)
1080p(OSD)
720p(OSD)
1080i(OSD)
Progressive to
Interlaced
(1080i)
(1080p)
(720p)
(480i)
480i
Primary
VSP
HDMI
Tx2
HDMI
Tx1
HD
Encoder
SD
Encoder
Video
36-bit
Input
Port
Exosd
24-bit
Input
Port
Serial
Video
RX
480i Video
from
Decoder
(480i)
Input
Muxing
Secondary:
Data
Formatting
& CSC
Primary:
Data
Formatting,
CSC & ACE
RX:
Data
Formatting
& CSC
Video
Muxing
Figure 16: ADV8003 Mode 2 Configuration
Mode 2 places the PVSP after the input block. The output from this is sent to the OSD which is in turn sent to the SVSP or PtoI converter.
This mode is very similar to mode 4, except that the OSD position has swapped with the PVSP. The primary reason is that, in this case,
the OSD data is not overlaid on the incoming video data and then scaled, but rather scaled and then overlaid. Scaling the video and OSD
separately may improve the quality of the video input to the SVSP. If it is possible, it is better to scale video and OSD separately and then
blend rather than scaling both together.
The example in
takes a 480i video signal and scales this to 1080p. This is then overlaid with OSD data scaled to 1080p. This
example can generate three different output formats (720p, 1080i, and 1080p) as well as outputting the input SD standard of 480i.
Содержание ADV8003
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