(付録 3)
Frequently Asked Questions
1.The feature of DX-VS1UE
Q.What is the DX-VS1UE
A.Video server box DX-VS1UE offers the solution of the network type remote surveillance server having many features, such as an internet server, and a picture compression device, serial device control. Monitoring and operation of the image of a digital recorder or a Pan/tilt/zoom camera can be performed through DX-VS1UE.
When you use the supplied crossover cable (red) and you cannot access by the above con- nection, please use two straight cables and try on the connection via the hub.
Q. What kind of preparation are needed to monitor images
A. You need to prepare a BNC cable and a digital recorder or an external camera.
Q. What kind of image compression system has been adopted?
A. DX-VS1UE has adopted the WAVELET compression system as picture compression. The WAVELET compression system is the still picture-based compression algorithm like JPEG well known for picture compression. Moreover, unlike MPEG, the standard image compression system, DX-VS1UE deals with image as a collection of still pictures and com- presses the still pictures at high speed, and transmits it.
Q. What is the difference between the WAVELET compression system and JPEG?
A. The difference between the WAVELET compression system and JPEG lies in the method of encoding. WAVELET algorithm uses DWT (distributed WAVELET conversion) to JPEG using DCT (distributed cosign conversion). WAVELET was adopted as the standard of digi- tal image compression in JPEG2000 by virtue of the high reliability.
Q. Can two or more users monitor image in different resolution simultaneously using DX- VS1UE?
A. DX-VS1UE makes it possible for 100 users to monitor the image simultaneously at dif- ferent resolution. Furthermore, DX-VS1UE supports gray mode for the users who connect through low speed network line. Even if a certain user is viewing monochrome image in standard resolution (360x243), another user can view color image in the highest resolution (720x486).
Q. What is the maximum transmission speed?
A. DX-VS1UE compresses and transmits at speed of 30 fps in case of 10BASE-T network. However, all users cannot monitor image at the speed. It’s because transmission speed is greatly dependent on simultaneous connection of the performance of client PC, and network environment and two or more users.
Q. Up to how many users can connect with DX-VS1UE simultaneously?
A. DX-VS1UE supports simultaneous connection of up to 100 users. In this case, each user can receive one frame per about 10 seconds, respectively.
Q. Is there any pan/tilt/zoom functions in DX-VS1UE?
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DX-VS1UE User’s Manual
