參數(shù)資料
型號(hào): TVP5020
廠商: TEXAS INSTRUMENTS INC
元件分類: 顏色信號(hào)轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP80
封裝: POWER, PLASTIC, TQFP-80
文件頁(yè)數(shù): 43/89頁(yè)
文件大?。?/td> 376K
代理商: TVP5020
2–34
Table 2–9. Teletext Byte Order (Continued)
BYTE
NUMBER
NABTS – 525 OR 625
LINE SYSTEM
WST – 525 LINE SYSTEM
WST – 625 LINE SYSTEM
13
Data block 6
Data byte 9
14
Data block 7
Data byte 10
15
Data block 8
Data byte 11
16
Data block 9
Data byte 12
17
Data block 10
Data byte 13
18
Data block 11
Data byte 14
19
Data block 12
Data byte 15
20
Data block 13
Data byte 16
21
Data block 14
Data byte 17
22
Data block 15
Data byte 18
23
Data block 16
Data byte 19
24
Data block 17
Data byte 20
25
Data block 18
Data byte 21
26
Data block 19
Data byte 22
27
Data block 20
Data byte 23
28
Data block 21
Data byte 24
29
Data block 22
Data byte 25
30
Data block 23
Data byte 26
31
Data block 24
Data byte 27
32
Data block 25
Data byte 28
33
Data block 26
Data byte 29
34
Data block 27/suffix
Data byte 30
35
Data block 28/suffix
Data byte 31
36
Padding byte
Data byte 32
37
Data byte 33
38
Data byte 34
39
Data byte 35
40
Data byte 36
41
Data byte 37
42
Data byte 38
43
Data byte 39
44
Data byte 40
The padding byte is used to ensure an even number of writes. This byte does not contain any useful information. The
read pointer automatically advances past this byte so the user does not have to read the padding byte.
2.13.2
Teletext as Ancillary Data in Video Stream
Sliced teletext data can be output as ancillary data in the video stream in ITU-R BT.656 mode. Teletext data
is output on the Y7:0 pins during the horizontal blanking period following the line that the data was retrieved.
Dummy ancillary data blocks with special timing header information are inserted during certain horizontal
blanking periods to provide data synchronization information. Tables 2–10 through 2–13 show the format
and sequence of the ancillary data inserted into the video stream.
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