Mobile DVR (Digital Video Recorder)

     Mobile DVR (Digital Video Recorder) - for All Vehicles
          - HDD + GPS + Speed Sensor + RF Module, etc. -
                 -( High Image Quality )-    E-Map Tracking ~  -( for Bus, Truck, Taxi, etc. )-
            -( Compact Smallest Design : Suitably entering into Car Audio Deck Box )-

--< Updated Specifications >--

Section	Proposed Specifications (MDH-412)
Video Input Method	Supports NTSC/PAL
Video Input	4 CH
Screen Partition	4 Way
Resolution (NTSC)	720480, 360480
Compression Method (Storage)	MJPEG
Record Mode	24 hour recording available
Search Mode	Time/Date, Calendar, Event
Operation Temp and Humidity	-20ĄĆC ~ 60ĄĆC, 20~95%RH / (With Heater down to -40ĄĆC)
Power	10~48V DC
HDD & CF Memory -(Common-Used)-	2.5"(80GB ~ , E-IDE), 2.5Ąą(80GB ~ , S-ATA) CF Memory (2GB ~ )
Dimensions / Weight	180(W) 50(H) * 195(D)mm, 0.8KG*
Search System	1~128 x speed (x speed adjustable) * E-Map Position Tracking Search
Recording (Camera)	- 4 (installation position negotiable) : Front, Fare box,Inside recording, Outside recording - Infrared Camera (3 - Fare Box, Inside, Outside)
Certificate	CE, FCC

--< Comparison between MJPEG & MPEG4 >--
~( MJPEG is better than MPEG4 for Mobile DVR )~

Section	MJPEG	MPEG-4
Strong Points	- Maintains constant quality regardless of bandwidth - Image quality maintained regardless of complexity of image - Excellent Compatibility: Used as standard compression for all PC's - Easy to manage, use and store - Low-cost encoding/decoding used - Quick search and easy to handle images - Separate image per frame - Outstanding Recovery: Fast recovery for packet losses - Short fetching standby time	- Maintains high frame rate even in high bandwidths - High Compression: When requested in low bandwidth - Small Storage Space - Constant bit rate (CBR) - Used when making network designs and bandwidth equipment simple - Variable bit rate(VBR) - Used when there are no restrictions in bandwidth - Ensures high image quality according to increasing bit rate
Weak Points	- Increased bandwidth through higher frame rate - Needs large storage space - Keeps constant bandwidth even when there is no motion	- Complex Video Compression - Long video fetching standby time. - Requires PC specs with high performance monitoring - Heavy loss when there is packet losses. - Additional license costs for encoding and decoding - Uses many profiles and levels making it difficult to procure a standard.

        ~# The Reasons why MJPEG than MPEG4 #~
                1) UK Security Newspaper also reported last year that MJPEG is better
                     than MPEG4 for Mobile DVR's.
                2) MPEG4 : This compression carries i-Frame (Background) &
                                  p-Frame (Moving) separately, therefore in case any one Frame
                                  among i-Frame & p-Frame is broken out due to impact, etc.,
                                  then the video recovery is not possible owing to impossibility
                                  of both Frame assembly.
                3) MJPEG : Since this compression carries the Images (Pictures)
                                  one image by one image, therefore even if any image is
                                  broken out the general video recovery is possible.
                4) For the static images MPEG4 is ok for office, general security view, etc.
                     however for the ever moving Mobile Vehicle purposes MJPEG is
                     the most suitable applicable compression.
        ~# Mobile H.264 Compression chip is under development by Korean industries                and it will be available very soon, to be applied to our Mobile DVR then.
        ~# For E-Map, we supply Yahoo Map for our E-Map solution.
        ~# Mobile Communication : WiFi, Wibro, HSDPA, etc. will be available
                                                  in the year of 2009.

--< Instruction Manuals >--

1) User Manual Office.File (1.6 Mb)

2) PC Viewer Manual Office.File (2.2 Mb)

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