參數(shù)資料
型號(hào)： ADV7181BCP
廠商： ANALOG DEVICES INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： Multiformat SDTV Video Decoder
中文描述： COLOR SIGNAL DECODER, QCC64
封裝： 9 X 9 MM, LEAD FREE, MO-220-VMMD, LFCSP-64
文件頁(yè)數(shù)： 51/96頁(yè)
文件大?。?/td> 873K
代理商： ADV7181BCP
ADV7181B
Table 63. Data Byte Allocation
Raw Information Bytes
Retrieved from the Video Line
1
4
1
4
0
2
0
2
Gemstar Bit Names
DID. The data identification value is 0x140 (10-bit value).
Care has been taken that in 8-bit systems, the 2 LSBs do
not carry vital information.
Rev. 0 | Page 51 of 96
2×
GDECAD
0
1
0
1
User Data-Words
(Including Padding)
8
4
4
4
Padding Bytes
0
0
0
2
DC[1:0]
10
01
01
01
EP and !EP. The EP bit is set to ensure even parity on the
data-word D[8:0]. Even parity means there is always an
even number of 1s within the D[8:0] bit arrangement. This
includes the EP bit. !EP describes the logic inverse of EP
and is output on D[9]. The !EP is output to ensure that the
reserved codes of 00 and FF cannot happen.
EF. Even field identifier. EF = 1 indicates that the data was
recovered from a video line on an even field.
2X. This bit indicates whether the data sliced was in
Gemstar 1× or 2× format. A high indicates 2× format.
line[3:0]. This entry provides a code that is unique for each
of the possible 16 source lines of video from which
Gemstar data may have been retrieved. Refer to Table 72
and Table 73.
DC[1:0]. Data count value. The number of User Data
Words in the packet divided by 4. The number of user data
words (UDW) in any packet must be an integral number of
4. Padding is required at the end, if necessary (requirement
as set in ITU-R BT.1364). Refer to Table 63.
The 2X bit determines whether the raw information
retrieved from the video line was 2 or 4 bytes. The state of
the GDECAD bit affects whether the bytes are transmitted
straight (i.e., two bytes transmitted as two bytes) or
whether they are split into nibbles (i.e., two bytes
transmitted as four half bytes). Padding bytes are then
added where necessary.
CS[8:2]. The checksum is provided to determine the
integrity of the ancillary data packet. It is calculated by
summing up D[8:2] of DID, SDID, the Data Count byte,
and all UDWs, and ignoring any overflow during the
summation. Since all data bytes that are used to calculate
the checksum have their 2 LSBs set to 0, the CS[1:0] bits are
also always 0.
!CS[8] describes the logic inversion of CS[8]. The value
!CS[8] is included in the checksum entry of the data packet
to ensure that the reserved values of 0x00 and 0xFF do not
occur.
Table 64 to Table 67 outline the possible data packages.
Gemstar 2× Format, Half-Byte Output Mode
Half-byte output mode is selected by setting CDECAD = 0; full-
byte output mode is selected by setting CDECAD = 1. See the
GDECAD Gemstar Decode Ancillary Data Format, Address
0x4C [0] section.
Gemstar 1× Format
Half-byte output mode is selected by setting CDECAD = 0, full-
byte output mode is selected by setting CDECAD = 1. See the
GDECAD Gemstar Decode Ancillary Data Format, Address
0x4C [0] section.
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參數(shù)描述
ADV7181BCPZ 制造商:Analog Devices 功能描述:
ADV7181BST 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:9-BIT BIT NTSC/PAL/SECAM VIDEO DECODER - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER
ADV7181C 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit, Integrated, Multiformat SDTV Video Decoder and RGB Graphics Digitizer
ADV7181CBCPZ 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
ADV7181CBCPZ-REEL 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit, Integrated, Multiformat SDTV Video Decoder and RGB Graphics Digitizer
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