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參數(shù)資料
| 型號： | HMP8116CN |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | NTSC/PAL Video Decoder |
| 中文描述： | COLOR SIGNAL DECODER, PQFP80 |
| 文件頁數(shù)： | 18/43頁 |
| 文件大?。?/td> | 182K |
| 代理商： | HMP8116CN |
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18
TELETEXT
The HMP8116 supports ITU-R BT.653 625-line and 525-line
teletext system B, C and D capture. NABTS (North American
Broadcast Teletext Specification) is the same as BT.653 525-
line system C, which is also used to transmit Intel Intercast
information. WST (World System Teletext) is the same as
BT.653 system B. Figure 17 shows the basic structure of a
video signal that contains teletext data.
The scan lines containing teletext information are monitored.
If teletext is enabled and teletext data is present, the teletext
data is output as BT.656 ancillary data.
Detection of Teletext
The teletext decoder monitors the scan lines, looking for the
16-bit clock run-in (sometimes refered to as the clock syn-
chronization code) used by teletext. If found, it locks to the
clock run-in, the teletext data is sampled and loaded into
shift registers, and the data is then transferred to internal
holding registers.
If the clock run-in is not found, it is assumed the scan line
contains video data unless other VBI information is detected,
such as WSS.
If a teletext clock run-in is found before line 23 or line 289 for
NTSC and (M) PAL, or line 336 for (B, D, G, H, I, N, N
C
) PAL,
the VBI Teletext Detect status bit is immediately set to “1”. If
not found by these lines, the status bit is immediately reset to
“0”.
Accessing the Teletext Data
The teletext data must be output as BT.656 ancillary data.
The I
2
C interface does not have the bandwidth to output
teletext information when needed.
Table 7 illustrates the teletext BT.656 ancillary data format
and Figure 16 depicts the portion of the incoming teletext
signal which is sliced and output as part of the ancillary data
stream. The teletext data is present during the horizontal
blanking interval after the line containing the teletext infor-
mation. The actual BT.656 bytes that contain teletext data
only contain 4 bits of the actual data packet. Note that only
the data packet of Figure 17 is sent as ancillary data; the
clock run-in is not included in the data stream.
TABLE 6. OUTPUTTING THE SLICED WSS DATA AS BT.656 ANCILLARY DATA
PIXEL OUTPUT
P15
P14
P13
P12
P11
P10
P9
P8
Preamble
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Data ID
P14
ep
1
1
0
0
1
0 =odd field data
1 =even field data
Data Block Number
P14
ep
0
0
0
0
0
1
Data Word Count
P14
ep
0
0
0
0
1
0
WSS Data
P14
ep
0
0
0
0
bit 13
bit 12
P14
ep
0
0
bit 11
bit 10
bit 9
bit 8
P14
ep
0
0
bit 7
bit 6
bit 5
bit 4
P14
ep
0
0
bit 3
bit 2
bit 1
bit 0
WSS CRC
Data
P14
ep
0
0
0
0
bit 5
bit 4
P14
ep
0
0
bit 3
bit 2
bit 1
bit 0
P14
ep
0
0
0
0
0
0
P14
ep
0
0
0
0
0
0
CRC
P14
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
NOTES:
31. ep = even parity for P8-P13.
32. WSS CRC data = “00 0000” during PAL operation.
33. CRC = Sum of P8-P14 of Data ID through last user data word. Preset to all zeros, carry is ignored.
HMP8116
Intercast is a trademark of Intel Corporation.
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PDF描述 |
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| HMP8117 | NTSC/PAL Video Decoder |
| HMP8117CN | NTSC/PAL Video Decoder |
| HMP8154 | NTSC/PAL Encoders |
| HMP8154CN | NTSC/PAL Encoders |
| HMP8156A | NTSC/PAL Encoders |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HMP8117 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:NTSC/PAL Video Decoder |
| HMP8117_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:NTSC/PAL Video Decoder |
| HMP8117CN | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 80PQFP,0+70C NTSC/PAL VIDEO DECODER W/MA RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| HMP8117CN96 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HMP8117CNZ | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 W/ANNEAL 80PQFP 0+70 DECODER W/MA RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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