參數(shù)資料
型號： SAF7118H
廠商： NXP Semiconductors N.V.
元件分類： 通用總線功能
英文描述： Multistandard video decoder with adaptive comb filter and component video input
封裝： SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;
文件頁數(shù)： 169/175頁
文件大?。?/td> 898K
代理商： SAF7118H
SAF7118_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 4 July 2008
169 of 175
NXP Semiconductors
SAF7118
Multistandard video decoder with adaptive comb filter
Workaround
:
Such error can be detected and corrected through software post-processing, by
investigating the actual byte count value BC for each data packet:
The entire data packet must be captured in some intermediate memory accessible to
software. (The SAV and EAV sequences may get dropped, i.e. not stored in memory.
At least 48 bytes have to be captured).
The last byte before the SAV sequence contains the BC = byte count of ‘payload’, which is
counted from IDI1 byte to last actual sliced data byte.
The BC byte is coded with 6 bits count value in the 2 lower bits, and complemented with
an odd parity bit in the MSB.
In nominal case those BC are 2 bytes more than the real MOJI byte count, i.e. 37d,
BC byte nominal = 25h.
In the event of insertion of erroneous bytes, the fault bytes are counted like payload,
resulting to an unexpectedly increased BC number, BC byte unequal 25h.
Recommended procedure
:
1. Capture VBI sliced data packet
2. Get BC byte, i.e. last byte before EAV sequence
3. Suppress MSB (parity bit), remain payload byte count BC
4. Whenever BC unequals 37d, exactly (BC
37d) erroneous bytes from capture must
be removed, directly following the IDI2 byte. That means:
a. If BC = 37d, then no error go to 5
b. If BC = 39d, then remove 2 erroneous bytes after internal header go to 5
c. If BC = 40d, then remove 3 erroneous bytes after internal header go to 5
5. MOJI data bytes are the 35 bytes following internal header, either if no error occurred
or after the erroneous bytes have been removed
Alternative procedure:
This approach is applicable only if it is true, that the first real MOJI byte per line is always
non-zero.
1. Capture VBI sliced data packet
2. Parse through data set, find internal header (by counting)
3. After internal header, skip zero bytes until first non-zero byte
4. MOJI data bytes are the 35 bytes beginning with that first non-zero byte
Table 152. BC byte description
7
OP
Odd parity
6
0
fix
0
5
5
4
4
3
3
2
2
1
1
0
0
BC = byte count of payload, bit value
16
8
32
4
2
1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAF7118H/V1,557 功能描述:視頻 IC COMPONENT VID DECODR RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAF7129AH 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital video encoder
SAF7129AH/V1 功能描述:視頻 IC 6 DAC VIDEO ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAF7129AH/V1,518 功能描述:視頻 IC 6 DAC VIDEO ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAF7129AH/V1,557 功能描述:視頻 IC 6 DAC VIDEO ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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