參數(shù)資料
型號(hào): ZR36016
廠商: Zoran Corporation
英文描述: JPEG Pre- and Post-Processor(JPEG 先-后處理器)
中文描述: JPEG格式前和后處理器(JPEG格式先-后處理器)
文件頁數(shù): 11/36頁
文件大?。?/td> 228K
代理商: ZR36016
11
Integrated Color Space / Raster-To-Block Converter
PXIN/PXOUT Bus Data Arrangement
The PXIN/PXOUT buses are 24 bits each. The 24 bits are
divided into 8-bit bytes, as follows.
PXIN/OUT[23:0]
MSB
LSB
23:16
MSB
LSB
15:8
MSB
LSB
7:0
The I/O arrangement is determined by the MODE and DSPY
fields, as shown below in Table 9. In this table, the 3 compo-
nents of (4:4:4), (4:2:2), (4:1:1), (1:0:0) formats are designated
(A:B:C), components of (4:4:4:4) format are designated
(A:B:C:D), and (A:B:C) corresponds with (R:G:B), (Y:Cb:Cr) or
(Cy:Ma:Ye). 1st, 2nd, etc., refer to the PXCLK time slots.
Table 9: I/O Bus Arrangements
PXINOUT
Bus
I/O Format
4:4:4
4:2:2
4:1:1
1:0:0
4:4:4:4
1st
2nd
1st
2nd
1st
2nd
3rd
4th
1st
2nd
1st
2nd
23-16
A
A
A
A
A
A
A
A
A
A
A
C
15-8
B
B
B
C
B[7:6]
/C[7:6]
B[5:4]
/C[5:6]
B[3:2]
/C[3:2]
B[1:0]
/C[1:0]
B
D
7-0
C
C
4:1:1 in Table 9 is the Philips H4V1 format. As shown in
Table 10, it uses only the upper 12-bits on the PXIN/PXOUT
buses.
Table 10: Philips 4:1:1 Format
PXIN/OUT
1st
2nd
3rd
4th
PXIN/OUT[23:16]
A[7:0]
A[7:0]
A[7:0]
A[7:0]
PXIN/OUT[15]
B[7]
B[5]
B[3]
B[1]
PXIN/OUT[14]
B[6]
B[4]
B[2]
B[0]
PXIN/OUT[13]
C[7]
C[5]
C[3]
C[1]
PXIN/OUT[12]
C[6]
C[4]
C[2]
C[0]
PXIN/OUT[11:0]
PXIN/PXOUT Delay
The image data which is input on the PXIN bus is output on the
PXOUT bus after an internal delay which depends on the MODE
field and HORZ bit of the registers. The delays of VIN to VOUT
and HIN to HOUT are the same as these. See Table 11 and
Figure 5.
1.
Where MD =
1 when MODE = 0x0, 0x4, 0x8 or 0xC and = 0 for all others.
Table 11: PXIN to PXOUT Delay
Configuration
MD
[1]
Delay in PXCLK Clock
Cycles (d)
HORZ
0
0
20
0
1
24
1
0
17
1
1
20
HIN
PXIN
n-3
n-2
n-1
n
0
1
d-3
d-2
d-1
d
d+1
d+2
d+3
Figure 5. PXIN/PXOUT Delay Timing
HOUT
PIXOUT
n-3-d
n-2-d
n-1-d
n-d
-d
1-d
n-2
n-1
n
0
1
2
3
n = number of PXCLKs in one full line (HSYNC to HSYNC)
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