ADV8005 Hardware Reference Manual
UG-707
2.1.11.
Mode 10 – Picture in Picture (PiP) (External OSD Less Than 720p)
Mode 10 should be used if:
•
OSD data is input via the EXOSD TTL 24-bit input port
•
OSD data input via the EXOSD TTL 24-bit input port is less than 720p
Figure 20:
Mode 10 Configuration
Mode 10 is used to support the external input of either part of or the complete OSD from another device, for example, an MCU. With support
for HS, VS, DE and CLK, the external OSD input can also be used to input video data. Using mode 10, the external OSD bus can be used to
support picture in picture (PiP) with two video streams.
In this mode, the input from the EXOSD TTL 24-bit input port is written into DDR2 memory and read back by the OSD core as a region of the
OSD. This region is then blended with input video.
480p Video
from
Decoder
OSD
Blend
Build
OSD
Scale
OSD
Secondary
VSP
Output
Muxing
Mode 10 - PiP (External OSD < 720p)
DDR2 Memory
Interface
OSD rendered at a single set resolution: 480p
(480p)
(1080p)
(1080p)
1080p(PiP)
480p(OSD only)
1080p(PiP)
(480p)
OSD
Data
Only
(1080p)
Primary
VSP
HDMI
Tx2
HDMI
Tx1
HD
Encoder
SD
Encoder
720p Video
from
Transceiver
(720p)
(480p)
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
480p Video
from
Decoder
OSD
Blend
Build
OSD
Scale
OSD
Secondary
VSP
Output
Muxing
Mode 10 - PiP (External OSD < 720p)
DDR2 Memory
Interface
OSD rendered at a single set resolution: 480p
(480p)
(1080p)
(1080p)
1080p(PiP)
480p(OSD only)
1080p(PiP)
(480p)
OSD
Data
Only
(1080p)
Primary
VSP
HDMI
Tx2
HDMI
Tx1
HD
Encoder
SD
Encoder
720p Video
from
Transceiver
(720p)
(480p)
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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