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參數(shù)資料
| 型號： | ADV7181B |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat SDTV Video Decoder |
| 中文描述： | 標清多格式視頻解碼器 |
| 文件頁數(shù)： | 23/96頁 |
| 文件大?。?/td> | 873K |
| 代理商： | ADV7181B |
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ADV7181B
SD_SAT_Cr[7:0] SD Saturation Cr Channel, Address 0xE4 [7:0]
Rev. 0 | Page 23 of 96
This register allows the user to control the gain of the Cr
channel only, which in turn adjusts the saturation of the picture.
Table 22. SD_SAT_Cr Function
SD_SAT_Cr[7:0]
Description
0x80 (default)
Gain on Cr channel = 0 dB.
0x00
Gain on Cb channel = 42 dB.
0xFF
Gain on Cb channel = +6 dB.
SD_OFF_Cb[7:0] SD Offset Cb Channel, Address 0xE1 [7:0]
This register allows the user to select an offset for the Cb
channel only and adjust the hue of the picture. There is a
functional overlap with the Hue [7:0] register.
Table 23. SD_OFF_Cb Function
SD_OFF_Cb[7:0]
Description
0x80 (default)
0 offset applied to the Cb channel.
0x00
312 mV offset applied to the Cb channel.
0xFF
+312 mV offset applied to the Cb channel.
SD_OFF_Cr [7:0] SD Offset Cr Channel, Address 0xE2 [7:0]
This register allows the user to select an offset for the Cr channel
only and adjust the hue of the picture. There is a functional
overlap with the Hue [7:0] register.
Table 24. SD_OFF_Cr Function
SD_OFF_Cr[7:0]
Description
0x80 (default)
0 offset applied to the Cr channel
0x00
312 mV offset applied to the Cr channel
0xFF
+312 mV offset applied to the Cr channel
BRI[7:0] Brightness Adjust, Address 0x0A [7:0]
This register controls the brightness of the video signal. It allows
the user to adjust the brightness of the picture.
Table 25. BRI Function
BRI[7:0]
Description
0x00 (default)
Offset of the luma channel = 0IRE.
0x7F
Offset of the luma channel = 100IRE.
0x80
Offset of the luma channel = –100IRE.
HUE[7:0] Hue Adjust, Address 0x0B [7:0]
This register contains the value for the color hue adjustment. It
allows the user to adjust the hue of the picture.
HUE[7:0] has a range of ±90°, with 0x00 equivalent to an
adjustment of 0°. The resolution of HUE[7:0] is 1 bit = 0.7°.
The hue adjustment value is fed into the AM color demodula-
tion block. Therefore, it only applies to video signals that contain
chroma information in the form of an AM-modulated carrier
(CVBS or Y/C in PAL or NTSC). It does not affect SECAM and
does not work on component video inputs (YPrPb).
Table 26. HUE Function
HUE[7:0]
Description
(Adjust Hue of the Picture)
0x00 (default)
Phase of the chroma signal = 0°.
0x7F
Phase of the chroma signal = –90°.
0x80
Phase of the chroma signal = +90°.
DEF_Y[5:0] Default Value Y, Address 0x0C [7:2]
When the ADV7181B loses lock on the incoming video signal
or when there is no input signal, the DEF_Y[5:0] register allows
the user to specify a default luma value to be output. This value
is used under the following conditions:
ADV7181B lost lock to the input video signal. This is the
intended mode of operation (automatic mode).
If DEF_VAL_AUTO_EN bit is set to high and the
the video decoder. This is a forced mode that may be useful
during configuration.
The DEF_VAL_EN bit is set, regardless of the lock status of
The DEF_Y[5:0] values define the 6 MSBs of the output video.
The remaining LSBs are padded with 0s. For example, in 8-bit
mode, the output is Y[7:0] = {DEF_Y[5:0], 0, 0}.
DEF_Y[5:0] is 0x0D (Blue) is the default value for Y.
Register 0x0C has a default value of 0x36.
DEF_C[7:0] Default Value C, Address 0x0D [7:0]
The DEF_C[7:0] register complements the DEF_Y[5:0] value. It
defines the 4 MSBs of Cr and Cb values to be output if
The DEF_VAL_AUTO_EN bit is set to high and the
ADV7181B can’t lock to the input video (automatic mode).
DEF_VAL_EN bit is set to high (forced output).
The data that is finally output from the ADV7181B for the
chroma side is Cr[7:0] = {DEF_C[7:4], 0, 0, 0, 0}, Cb[7:0] =
{DEF_C[3:0], 0, 0, 0, 0}.
DEF_C[7:0] is 0x7C (blue) is the default value for Cr and Cb.
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| ADV7181BBCPZ | Multiformat SDTV Video Decoder |
| ADV7181BBSTZ | Multiformat SDTV Video Decoder |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7181BBCPZ | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:ADV718XB DECODER FAMILY UPDATES - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER |
| ADV7181BBSTZ | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LQFP 制造商:Analog Devices 功能描述:IC VIDEO ENCODER |
| ADV7181BCP | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:10BIT NTSC/PAL/SECAM VIDEO DECODER I.C. - Bulk |
| 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 |
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