4 | DiBos application note

Application descriptionThis Application Note describes how IP camera viewing and recording can be added to a digital recorder used to record conventional analog cameras, to create a truly hybrid analog/IP recording and transmission solution.

IntroductionMany conventional analog CCTV systems use a digital video recorder to store the recordings on hard disks. There are many advantages to the use of digital recorders, including the ability to view live video and recordings remotely via LAN, WAN or internet.

However there are many sites where it can be expensive to add analog cameras:• Adding coax, UTP or fi ber cabling is costly, but

frequently there is already network cabling available.• All analog DVR video inputs are occupied, and there is

no possibility of DVR expansion without adding an additional recorder.

With the Bosch DiBos Video recording and transmission system, in addition to the conventional analog cameras (Fig. 1), IP cameras or analog cameras connected via network video servers, can be added to the system, connected via the standard network port of the DiBos. (Fig. 2).

The DiBos enables live audio listening and audio recording as well as video viewing and recording for the network devices.If there are JPEG network cameras on the site these can also be recorded along with Bosch MPEG-4 network-devices and conventional cameras.The analog cameras are connected to the conventional DiBos inputs via BNC connectors, using standard 1 V peak-to-peak signals.

IP cameras can be added by connecting them via the network (Fig. 2).

DiBos – Adding IP cameras to an analog CCTV system

Creating a hybrid Analog/Digital CCTV system

Bosch Security SystemsFor more information please visit www.boschsecurity.com or send an e-mail to emea.securitysystems@bosch.com

All rights reservedPrinted in the Netherlands VS-EH-en-06_F01U517346_01

User Benefi tsThe key benefi t to the user is the ability to add and integrate a wide range of IP cameras to a digital recorder in conventional analog ensuring the optimum fl exibility in choice of camera and transmission method. Video and Audio signals and data to control PTZ or relays: Every thing at the same time is supported by only one network cable. Adding IP devices to an analog CCTV system brings fl exibility for temporal installed cameras and or audio surveillance.

Cameras can be added to the system or the system rebuilt within minutes, independent of how far the hybrid recorder is located from the supervised location.

The operator has just one user interface to operate, for conventional cameras and for the latest IP cameras added to the system.

This can dramatically reduce installation costs for remo-te cameras or temporary installations, while offering all the benefi ts of an advanced digital video and audio recording system.

Typical System Components Type NumbersConventional Cameras AutoDomes G3AxxxxxxEnviroDomes ENVxxxxxxDinion Cameras LTC04x5/x1DinionXF Cameras LTC04x5/x1

LTC06x0/x1Dinion IP camera NWC04X5

DiBos Digital Video Recorder and Transmission System

DiBos Micro DB xx Cy D2DiBos DB xx Cy R2

Bosch MPEG-4 video encodersSingle Channel Video Encoders VIP10

VIP X1VJ10

Dual Channel Video Encoder VIP X28 Channel Video Encoder VJ8004

VJ8008

2 | DiBos application note DiBos application note | 3

The following IP cameras and devices can be connected to the DiBos via the network:Ñ Bosch MPEG-4 cameras and Autodomes.Ñ Any PAL or NTSC camera connected to the

network via a Bosch MPEG-4 video server such as the VIP and Video Jet Range of encoders.

Ñ A wide variety of JPEG IP cameras.Ñ Conventional cameras connected via JPEG video

servers.

DiBos can display the live view from cameras in single or multiscreen mode. The IP cameras are treated as any other camera in live and playback mode and can there-fore be included with conventional cameras and of course added to the favorites list.

DiBos can record the IP camera in its scheduled recording. The motion detection of the IP devices can be used in DiBos to trigger image recording, image transmission, automatic controlling of relays, or calling up other macros in the DiBos programming.

The images can be stored on the internal or external hard drives and network drives as well. This makes the DiBos a real network recorder. For more details of DiBos as a pure IP recorder please see application note Connecting IP-enabled cameras to a network

Restrictions when using IP cameras When using conventional cameras connected via the video inputs of DiBos, the encoding of video is within DiBos. When using Bosch MPEG-4 IP cameras and servers this function is performed in the encoder. Hence the image quality and frame rate is set in the encoder.

Bosch network video servers and network cameras have a dual streaming facility that allows 2 different image qualities and frame rates to be confi gured. These are frequently set to high quality and real time for alarm recording, and lower quality and a time lapse mode for continuous recording.

The available network bandwidth is of course very important for the recordable image quality and the frame rate and must be taken into consideration.

IP Cameras in a larger DiBos systemThe DiBos confi guration shown in Fig. 3 is suitable for a large site with several buildings or fl oors in a building employing legacy CCTV systems with analog cameras. To avoid the cost of replacing these CCTV systems, they are each upgraded with the addition of a DiBos unit that is also connected to the Local Area Network.

During confi guration, each network camera can be assigned in advance to any one of the DiBos units in the installation. Thereafter, all images captured by that camera are stored on the hard disk of the DiBos to which it has been assigned. Should it become necessary, the camera can also be reassigned to another DiBos at any later time.

Fig.4 shows a multi-site hybrid CCTV installation as might be used, for example, to monitor several sites at different geographical locations. As in the example of Fig.2, the installation incorporates several legacy systems that are upgraded with network connectivity by DiBos units. LANs at different sites are all interconnected by a Wide Areas Network that could, for example, be a large company’s private Intranet.

Confi guring DiBos to include IP camerasThe DiBos confi guration is simple to use, and there is no exception when adding IP cameras as can be seen from the screen shot. Simply inputting basic data such as the IP address and the encoder to be used for viewing and continuous and alarm recording is all that is required. Audio streams from Bosch network devices can be recorded continuously or just during alarm situations. Relays and inputs connected to the IP devices are inte-grated in the DiBos functionality as well.

Motion detection takes place in the encoder rather than the DiBos.

Fig. 3 Several DiBos local CCTV systems plus network cameras all connected to a LAN and all supervised by a PC running the proprietary DiBos Receiver / IP Recorder software.

Fig. 4 Multi-site hybrid installation employing a range of legacy analog systems plus network cameras all inter connected via a Wide Area Network (WAN).

Fig. 2 A single DiBos controlling and recording from analog and network-based CCTV systems.

Fig. 1 DiBos with analog cameras connected