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參數(shù)資料
| 型號： | VV6500 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DUAL-MODE DIGITAL CAMERA CHIPSET |
| 中文描述： | 雙模式數(shù)字相機(jī)芯片組 |
| 文件頁數(shù)： | 10/63頁 |
| 文件大小： | 563K |
| 代理商： | VV6500 |
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Detailed features
STV0680B + VV6444/6410/6500
10/63
Version 3.4
2
Detailed features
2.1
Sensor type and image formats
The sensor type is auto-detected by STV0680B, which ensures that the correct sensor timing is
enabled, and the correct image resolutions are enabled, as shown in
Table 3
.
For stills photography, ‘High’ or ‘Low’ resolution mode can be selected, to give CIF or QCIF pictures
from a CIF sensor, and VGA or QVGA from a VGA sensor (see
Table 3
). Reduced resolution allows
for storage of more images. Images captured in both ‘High’ and ‘Low’ resolution can be stored in
camera memory at the same time. Therefore there is no need for images stored in memory to be
cleared before changing image resolution.
Where USB is connected, the host PC software (through a Video for Windows driver) can activate
tethered video mode, regardless of the user inputs to the camera buttons. In this case, the image
resolution is controlled by the PC driver.
Note:
When tethered VfW video (PC) or Quicktime driver (Mac) is activated, all images or recorded
sounds or video clips will be deleted from the camera SDRAM. A software solution is available
(“Camera control”, as part of the SDK for PC, and “Plug’n Save” for Mac) which can monitor
whether a camera is connected and will warn the user if activating the VfW driver will cause SDRAM
contents to be deleted.
Note: 1 VfW framerate is dependent on PC performance and USB bus loading
2 On a camera using STV0680B-003, the number of images which can be stored is reduced if Audio
sounds have been recorded on the camera or if custom sounds have been downloaded from the
PC to the camera. The reduction of capacity depends on the length of audio clip, but a rough guide
is that if 1 CIF image uses the same amount of SDRAM as 10sec of audio, and one VGA image
uses the same amount of SDRAM as 30 sec. of audio.
Sensor
Sensor
Image Size
Resolution
mode
Final Image Size
Max. no. of
images
stored in
16MBit
memory
(
Note 2
)
Max. no. of
images
stored in
64MBit
memory
(
Note 2
)
Approximate
VfW framerate
(
Note 1
)
VV6444
CIF 352 x 288
High
CIF 352 x 288
20
80
15 frames/sec.
Low
QCIF 176 x 144
(Subsampled)
80
322
(see
Note 3
)
25 frames/sec.
VV6410/
6411
CIF 352 x 288
High
CIF 352 x 288
20
80
15 frames/sec.
Low
QCIF 176 x 144
(Subsampled)
80
322
(see
Note 3
)
22.5 frames/sec.
VV6500
VGA 640 x 480
High
VGA 640 x 480
(6)
26
2 frames/sec.
Low
QVGA 320 x 240
(Subsampled)
(26)
107
(see
Note 3
)
12 frames/sec.
Table 3 : Image modes supported (STV0680B-001)
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