參數(shù)資料
型號: BT848A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁數(shù): 56/141頁
文件大?。?/td> 1149K
代理商: BT848A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Brooktree
46
F
UNCTIONAL
D
ESCRIPTION
Video and Control Data FIFO
L848A_A
Table 10. Table of PCI Bus Access Latencies
Video Format
Resolution
Mode
Max Bus
Latency Before FIFO
Overflow (uS)
NTSC 30 fps
640 x 480
RGB32
10
RGB24
13
RGB16/YCrCb 4:2:2
20
YCrCb 4:1:1
27
Y8, 8-bit dithered, VBI
41
NTSC 30 fps
320 x 240
RGB32
20
RGB24
27
RGB16/YCrCb 4:2:2
41
YCrCb 4:1:1
55
Y8, 8-bit dithered, VBI
83
PAL/SECAM 25 fps
768 x 576
RGB32
8
RGB24
11
RGB16/YCrCb 4:2:2
17
YCrCb 4:1:1
23
Y8, 8-bit dithered, VBI
34
PAL/SECAM 25 fps
384 x 288
RGB32
17
RGB24
23
RGB16/YCrCb 4:2:2
34
YCrCb 4:1:1
46
Y8, 8-bit dithered, VBI
69
Effective Rate:NTSC 640 x 480 12.27
(Pixels/Sec)
NTSC 320 x 240 6.14
NTSC 720 x 480 13.50
PAL
PAL
768 x 576 14.75
384 x 288 7.38
The above figures are based on a 33.33 MHz PCI bus.
Max Bus Latency before FIFO Overflow (uS) = FIFO FAFULL Limit (Effective Rate*Number of Bytes/Pixel)
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