S5D2650 Samsung Semiconductor, Inc., S5D2650 Datasheet - Page 34

• Manufacturer Part Number: S5D2650
• Description: Multistandard Video Decoder/scaler
• Manufacturer: Samsung Semiconductor, Inc.

S5D2650 Data Sheet
Table 7 lists all the video standards that the VBI data slicer supports. Some of these modes are auto detected
based on the current video input standard,
Configuring the VBI processing consists of many different steps which are individually explained below.
1.7.1. Enabling the VBI Processor
The VBI processor can be enabled independently for the ODD or EVEN fields with the ODDEN and EVENEN bits.
Some VBI data is only present on line in 1 of the 2 fields, These independent field enables allow control of the total
VBI data output from the chip. These controls apply to all VBI Lines, Thus it is not possible to enable Closed
caption line 21 for the Even field and line 19 Teletext for both the odd and even field.
1.7.2. Selecting the Type of Output Data
As previously mentioned, there are 4 different ways the VBI data can be extracted. Three of these are selected as
shown in the table, the fourth method (CCEN and CCDAT pins) is always available if VBI processing is enabled.
60Hz Teletext system C
(NTSC / Intercast)
50Hz Teletext system B
(PAL)
50Hz Teletext system A
(SECAM)
60Hz Teletext system B
50Hz Teletext system C
50Hz Teletext system D
60Hz Teletext system D
Closed Caption NTSC 601
CGMS (NTSC 60Hz)
WSS (PAL 50Hz)
ELECTRONICS
Mode
Table 7: Video Standards Supported by VBI Decoder
Format
Detection Bits
Value of Chip
N/A
1
0
0
0
0
0
0
1
0
SECAM VBIL0-15 TT_SYS
N/A
N/A
N/A
0
0
1
1
1
1
1
Registers to enable
Required Values of
2
2
2
2
2
2
2
1
3
3
Standard
N/A
N/A
N/A
0
0
0
1
2
3
3
5.6457875
0.5035
0.447443
5.727272
6.9375
6.203125
5.727272
5.734375
5.727272
5.0000
Data Rate
Characteristics of the
MULTIMEDIA VIDEO
(MHz)
Standard
272 (34)
344 (43)
304 (38)
280 (35)
272 (34)
280 (35)
280 (35)
16 (2)
20 (3)
84
Bits (bytes)
Number of
PAGE 34 OF 95
7/18/03