參數(shù)資料
型號(hào): TW2802
廠商: Electronic Theatre Controls, Inc.
英文描述: TW2802/4 Multiple Video Decoder For Security Applications
中文描述: TW2802 / 4多路視頻解碼器的安全應(yīng)用
文件頁(yè)數(shù): 25/80頁(yè)
文件大?。?/td> 946K
代理商: TW2802
www.techwellinc.com
Preliminary
TW2804/TW2802 Multiple Video Decoder
Techwell, Inc.
Datasheet Rev. 2.4
09/09/2003
25
H S
VS
FLD
Tim ing1
Tim ing2
Tim ing1
Tim ing2
Tim ing1
Tim ing2
Tim ing1 : 40 system clock(54M H z) for the Even field w ith VSM O D E=1 or O dd field
Tim ing2 : 1760 system clock(54M H z) for the Even field w ith VSM O D E=0
Fig 14 Horizontal and Vertical Timing in Video Output
Dual ITU-R BT.656 Format in 54MHz
Dual ITU-R BT.656 format in 54MHz is very useful to the security applications, which need two
independently scaled video images for display and record purpose. In the case of HSCALE_X =
16’h7FFF and HSCALE_Y = 16’hFFFF, the timing diagram of video output is illustrated in Fig
15.
CLK27O
VD[7:0]
HACIVE
EAV code
FFh FFh 00h 00h 00h 00h XY XY 00h 00h
FFh FFh 00h 00h 00h 00h XY XY
00h 00h
00h Cb0 00h Y0 Cb0 Cr0 Y0 Y1 Cr0 Cb2 Y1 Y2 00h Cr2 00h Y3
VALID
CLK54I
SAV code
Data
Data
: Scaled data output for Display purpose (X path)
: Scaled data output for Record purpose (Y path)
Fig 15 Timing Diagram in Dual ITU-R BT.656 with 54MHz format
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