參數(shù)資料
型號(hào): TVP5146M2PFP
廠商: TEXAS INSTRUMENTS INC
元件分類(lèi): 顏色信號(hào)轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP80
封裝: GREEN, PLASTIC, HTQFP-80
文件頁(yè)數(shù): 76/107頁(yè)
文件大小: 949K
代理商: TVP5146M2PFP
SLES141G
– JULY 2005 – REVISED APRIL 2011
Table 2-76. AGC White Peak Processing Register
Subaddress
74h
Default
00h
7
6
5
4
3
2
1
0
Luma peak A
Reserved
Color burst A
Sync height A
Luma peak B
Composite
Color burst B
Sync height B
peak
Luma peak A:
Use of the luma peak as a video amplitude reference for the back-end feed-forward type AGC algorithm
0 = Enabled (default)
1 = Disabled
Color burst A:
Use of the color burst amplitude as a video amplitude reference for the back-end
Note: Not available for SECAM, component, and B/W video sources.
0 = Enabled (default)
1 = Disabled
Sync height A:
Use of the sync height as a video amplitude reference for the back-end feed-forward type AGC algorithm
0 = Enabled (default)
1 = Disabled
Luma peak B:
Use of the luma peak as a video amplitude reference for front-end feedback type AGC algorithm
0 = Enabled (default)
1 = Disabled
Composite peak:
Use of the composite peak as a video amplitude reference for front-end feedback type AGC algorithm
Note: Required for CVBS and SCART (with color burst) video sources.
0 = Enabled (default)
1 = Disabled
Color burst B:
Use of the color burst amplitude as a video amplitude reference for front-end feedback type AGC algorithm
Note: Not available for SECAM, component, and B/W video sources
0 = Enabled (default)
1 = Disabled
Sync height B:
Use of the sync-height as a video amplitude reference for front-end feedback type AGC algorithm
0 = Enabled (default)
1 = Disabled
Note: If all 4 bits of the lower nibble are set to logic 1 (that is, no amplitude reference selected), then the front-end analog and digital
gains are automatically set to nominal values of 2 and 2304, respectively.
If all 4 bits of the upper nibble are set to logic 1 (that is, no amplitude reference selected), then the back-end gain is set automatically to
unity.
If the input sync height is greater than 100% and the AGC-adjusted output video amplitude becomes less than 100%, then the back-end
scale factor attempts to increase the contrast in the back end to restore the video amplitude to 100%.
70
Functional Description
Copyright
2005–2011, Texas Instruments Incorporated
Product Folder Link(s): TVP5146M2
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