bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 36

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

26
1.0 Functional Description
1.7 Video Scaling, Cropping, and Temporal Decimation
Table 1-8. Scaling Ratios for Popular Formats Using Frequency Values
Full Resolution
1:1
CIF
2:1
QCIF
4:1
ICON
8:1
Notes: 1. PAL-M–HSCALE and VSCALE register values should be the same for NTSC.
Scaling Ratio
2. PAL-N combination–HSCALE register values should be the same as for CCIR resolution NTSC. VSCALE register
3. SECAM–HSCALE and VSCALE register values should be the same as for PAL.
values should be the same as for CCIR resolution PAL.
NTSC CCIR601
NTSC CCIR601
NTSC CCIR601
NTSC CCIR601
NTSC SQ Pixel
NTSC SQ Pixel
NTSC SQ Pixel
NTSC SQ Pixel
PAL CCIR601
PAL CCIR601
PAL CCIR601
PAL CCIR601
PAL SQ Pixel
PAL SQ Pixel
PAL SQ Pixel
PAL SQ Pixel
Format
In this equation, the HACTIVE value cannot be cropped; it represents the total
active region of the video line. This equation produces roughly the same result as
using the full line length ratio shown in the first example. However, due to trunca-
tion, the HSCALE values determined using the active pixel ratio will be slightly
different than those obtained using the total line length pixel ratio. The values in
Table 1-8 were calculated using the full line length ratio.
Resolution
(including
780 x 525
858 x 525
864 x 625
944 x 625
390 x 262
429 x 262
432 x 312
472 x 312
195 x 131
214 x 131
216 x 156
236 x 156
sync and
blanking
interval)
107 x 65
108 x 78
118 x 78
97 x 65
Total
D829BDSA
(Active Pixels)
Resolution
640 x 480
720 x 480
720 x 576
768 x 576
320 x 240
360 x 240
360 x 288
384 x 288
160 x 120
180 x 120
180 x 144
192 x 144
80 x 60
90 x 60
90 x 72
96 x 72
Output
Register
HSCALE
0x02AC
0x3AAA
Values
0x0504
0x033C
0x1555
0x1A09
0x1679
0x3409
0x4412
0x3CF2
0x861A
0x7813
0x9825
0x89E5
0x00F8
0x11F0
VSCALE Register Values
Use Both
0x0000
0x0000
0x0000
0x0000
0x1E00
0x1E00
0x1E00
0x1E00
0x1A00
0x1A00
0x1A00
0x1A00
0x1200
0x1200
0x1200
0x1200
Fields
VideoStream II Decoders
Bt829B/827B
0x1A00
0x1A00
0x1A00
0x1A00
0x0000
0x0000
0x0000
0x0000
0x1E00
0x1E00
0x1E00
0x1E00
Single
Field
N/A
N/A
N/A
N/A