Chapter 1 Introduction
DVR-471 video server adopts embedded Linux operation system (RTOS) and TI Davinci
processor, which is completely independent of PC platform and, efficiently improves system
performance. Firmware is burned in FLASH, makes the system more steady and reliable.
DVR-471 video server has the function to compress the video signal and audio signal
simultaneously into H.264 compression standard; to transmit the compression stream through
network; to real-time video and audio preview; to support stream protocol (RTP/RTCP, RTSP); to
support IE browser, bi-directional voice communication and support multilingual etc.
Notes:
DVR-471: 4 channels video inputs and 4 channels audio inputs. All channels can
support CIF resolution real time (25FPS for PAL or 30FPS for NTSC).
1.1
DVR-471 functions and features
¾
Basic Function
:
1.
High speed & high compression ratio of H.264 video hardware real-time compression;
2.
Multiple security level leads to high system safety;
3.
Support one RS-485 interface that can be used to control pan-tilt-zoom and translucent
channel input;
¾
Compression Function
1.
Support four Channels of video (PAL/NTSC) signal, and can be real-time hardware
compressed in 25F/S (PAL) or 30F/S (NTSC) CIF resolutions independently. Video is
compressed using H.264 standard, and it
supports not only variable bitrate but also
variable frame rate
. When choosing video image quality, you can also limit the bit rate
of the compression code.
2.
Support OSD the position of the date and time can be adjusted, date and time can be
added automatically.
3.
Support LOGO, the position of it can be anywhere in the video image.
¾
Network Function
1.
Support one 10M/100M Ethernet compatible interface;
2.
Support TCP/IP protocol; Parameter setting, real-time video & audio previewing, status
examination, alarm through network and store the compression bit rate through network.
3.
Support pan-tilt-zoom control such as the turn of PTZ, iris and focus;
4.
Support remote upgrading and maintenance;
5.
RS-485 interfaces support transparent transmission mode, and remote hosts can control
serial devices through it;
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