參數(shù)資料
型號: ZR36067PQC-LV
英文描述: Peripheral IC
中文描述: 外圍芯片
文件頁數(shù): 9/16頁
文件大小: 228K
代理商: ZR36067PQC-LV
ZR36011
9
PRELIMINARY
MODE = 110
In this mode, the YCbCr format is 4:4:4, but the YCbCr pixel rate
is one half the RGB pixel rate. The CR pins carry the Cr data and
the CB pins carry the Cb data. In forward conversion, the YCbCr
data is 2:1 decimated through a three tap filter, as illustrated in
Figure 14. In inverse conversion, the input YCbCr data is inter-
polated by averaging two adjacent samples, as illustrated in
Figure 15.
CLK
R, G, B
(Output)
Y
(Input)
Figure 13. YCbCr to RGB Timing, MODE = 011
RGB
(0)
RGB
(1)
Y(0)
Y(1)
CHS
RGB
(2)
RGB
(3)
Y(2)
Y(3)
Y(8)
Y(9)
Y(10)
Y(11)
Y(12)
CR
(Input)
Cb(0)
Cr(2)
Cb(8)
Cr(10)
RGB
(4)
Data Output:
Y
CR
Y
Y0
Cr0
Cb0
CR
CB
Y1
Cr1
Cb1
Y2
Cr2
Cb2
Y3
Cr3
Cb3
Y4
Cr4
Cb4
Y5
Cr5
Cb5
Figure 14. Illustration of Decimation, MODE = 110
Y(N-1)+2Y(N)+Y(N+1)
Y(N+1)+2Y(N+2)+Y(N+3)
Y(N+3)+2Y(N+4)+Y(N+5)
4
4
4
Cr(N-1)+2Cr(N)+Cr(N+1)
Cr(N+1)+2Cr(N+2)+Cr(N+3)
Cr(N+3)+2Cr(N+4)+Cr(N+5)
4
4
4
CB
Cb(N-1)+2Cb(N)+Cb(N+1)
Cb(N+1)+2Cb(N+2)+Cb(N+3) Cb(N+3)+2Cb(N+4)+Cb(N+5)
4
4
4
Y-1
Y
Cr
Cb
Y
Cr
Cb
Y
Cr
Cb
CHS determines the validity of input data and synchronizes the
half-clock-rate data transitions on the Y, CR and CB pins. As
shown in Figure 16 for forward conversion, and Figure 17 for
inverse conversion, the second rising edge of CLK following the
rising edge of CHS latches the first valid input data sample.
Data Input:
Y
Y
Y0
Cr0
Cb0
CR
CB
Y1
Cr1
Cb1
Y2
Cr2
Cb2
Figure 15. Illustration of Interpolation, MODE = 110
Y (N)
Cr (N)
Cb (N)
Y (N)
Cr (N)
Cr (N)
Interpolator Output:
Y3
Cr3
Cb3
CR
CB
Y(N)+Y(N+1)
2
Y (N+1)
Cr (N+1)
Cb (N+1)
Y (N+2)
Cr (N+2)
Cb (N+2)
Y (N+2)
Cr (N+2)
Cb (N+2)
Y(N)
Cr(N)
Cb(N)
Y(N+1)+Y(N+2)
2
Y(N+1)
Y(N+2)
Y(N+2)+Y(N+3)
2
Cr(N)+Cr(N+1)
2
Cr(N+1)+Cr(N+2)
2
Cr(N+1)
Cr(N+2)
Cr(N+2)+Cr(N+3)
2
Cb(N)+Cb(N+1)
2
Cb(N+1)+Cb(N+2)
2
Cb(N+1)
Cb(N+2)
Cb(N+2)+Cb(N+3)
2
Y0
Cr0
Cb0
Y0+Y1
2
Cr0+Cr1
2
Cb0+Cb1
2
Y1
Cr1
Cb1
Y1+Y2
2
Cr1+Cr2
2
Cb1+Cb2
2
Y2
Cr2
Cb2
Y2+Y3
2
Cr2+Cr3
2
Cb2+Cb3
2
Y3
Cr3
Cb3
Y (N+1)
Cr (N+1)
Cb (N+1)
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