Vbi Data Processor; Vdp Configuration; Vdp Default Configuration - Analog Devices ADV7850 Hardware Manual

10 VBI DATA PROCESSOR

The VBI Data Processor (VDP) is capable of processing multiple VBI data standards on analog video.
For low data rate VBI standards like Closed Captioning (CCAP), Wide Screen Signaling (WSS), or Copy Generation Management System
(CGMS), the user can read the decoded data bytes from dedicated I
some high data rate standards like PDC, UTC, VPS or Gemstar. The decoded results can also be made available through I
through a dedicated fast SPI port.
The following VBI data standards can be decoded by the VDP block:
PAL
• Teletext system A or C or D
• Teletext system B or WST
• VPS (Video Programming System)
• VITC (Vertical Interval Time Codes)
• WSS
• CCAP
NTSC
•
Teletext system B and D
• Teletext system C or NABTS
•
VITC (Vertical Interval Time Codes)
• CGMS (Copy Generation Management System)
• Gemstar
• CCAP
525p and 625p
• CGMS
• CGMS TYPE B
720p
• CGMS
• CGMS TYPE B
1080i
• CGMS
• CGMS TYPE B
• VITC
10.1

VDP CONFIGURATION

The VBI data standard that the VDP decodes on a particular line of incoming video has been set by default, as described in Section
This can be over-ridden manually and any VBI data can be decoded on any line. The details of manual programming are described in
Section 10.1.2.

VDP Default Configuration

10.1.1
The VDP can decode different VBI data standards on a line to line basis. A list of the standards that VDP can support shown in
a list of VBI standards represented by 4-bit code used in this document. The standard represented by VBI_DATA_STD[3:0] varies,
depending on the video standard being processed.
By default, the VDP block is configured to decode certain standards from certain lines, depending on the video standard being processed
by the core. The various standards supported by default on different lines of VBI are described in
Rev. A May 2012
C registers for different standards. I
2
ITU-BT-653
ITU-BT-653
ETSI EN 300 231 V 1.3.1
BT.1119-1 / ETSI.EN.300294
ITU-BT-653
ITU-BT-653 / EIA-516
EIA-J CPR-1204 / IEC 61880
EIA-608
(CEA-805-A)
(CEA-805-A)
(CEA-805-A)
310
C readback is also supported for
2
C registers or
2
Table 63.
ADV7850
10.1.1.
Table 62 is