Samsung S5PC100 User Manual page 1429

VIDEO PROCESSOR
4.3.21 Video Processor Horizontal Zoom Ratio (VP_H_RATIO, R/W, Address = 0xF010_ 0064)
VP_H_RATIO
Reserved
VP_H_RATIO
4.3.22 Video Processor Vertical Zoom Ratio (VP_V_RATIO, R/W, Address = 0xF010_ 0068)
VP_V_RATIO
Reserved
VP_V_RATIO
9.8-20
Bit
[31:19] Reserved, read as zero, do not modify
Horizontal zoom ratio of SRC:DST
- 3.16 format
* Note : (3.16) format means that
- '3' is a integer.(Located in MSB)
[18:0]
- '16' is a fraction.(Located in LSB)
Example) SRC : DST = 1 : 2
Because of 16bit fraction, it is had to do 16 time
left shift operation. As a result, register value is
1/2 * 2^16 = 0x8000
Bit
[31:19] Reserved, read as zero, do not modify
Vertical zoom ratio of SRC:DST
- 3.16 format
This register should be as follows.
(1) BOB mode, IPC disable
VP_V_RATIO = SRC / DST
(2) BOB mode, IPC enable
VP_V_RATIO = 2 * SRC / DST
[18:0]
(This is because destination line number is
doubled by de-interlacing process itself)
* Note : (3.16) format means that
- '3' is a integer. (Located in MSB)
- '16' is a fraction. (Located in LSB)
Example) SRC : DST = 1 : 2
Because of 16bit fraction, it is had to do 16 time
left shift operation. As a result, register value is
1/2 * 2^16 = 0x8000
S5PC100 USER'S MANUAL (REV1.0)
Description
Description
Reset Value
0
0
Reset Value
0
0