Archive for June, 2010

Video Surveillance System Devices

Video Cassette Recording (VCR)

Today, security camera system may consist of many different products and technologies. Many suppliers build pieces of the system, whether it is part of a hybrid analog/digital implementation or an end-to-end networked IP solution. The following sections explain the evolution of the CCTV system, starting with a fully analog system and adding components until it achieves networked capability.

A traditional analog surveillance system consists of analog cameras, time-lapse VCRs and monitors. A coaxial cable runs from each camera to a multiplexing device, which allows multiple cameras recording to one VCR, with a monitor for viewing. The time-lapse VCR allows the operator to adjust when the VCR records so the standard two-hour VHS tapes can he used for much longer. The trade-off results in lower-quality images in return for less frequent tape changes or image overwriting.

Analog CCTV recording systems have been the basis surveillance and monitoring for the past twenty years .This technology is extremely old and outdated and is rapidly being replaced by digital recording technology which now represents over 80% of all new installations.

Digital Video Recording (DVR)

A DVR is a computer with a special video graphics card that connects it to an analog camera via 75-ohm coaxial cable. The card also converts the analog signal to a digital signal and compresses the resulting image so it can be stored on an internal hard drive, viewed or transported across a network. DVRs typically utilize a computer operating system such as Windows or Linux along with video management System (VMS) software. DVRs are controlled and accessed via keyboards, mice and external monitors in order to setup, run surveillance software and replay stored video. DVRs usually have an internal Ethernet connection for LAN or WAN attachments.

Network-Attached Digital Video Recorder (NDVR)

A Network-attached Digital Video Recorder is part PC and part “Network Appliance” A NDVR is very similar to a DVR and is sometimes called a “Network Appliance” because it does not require-attached keyboard, mouse or video monitor. The device is plugged directly into an Ethernet switch and the only way to access the device is through the network. The device still has an operating system but it resides in firmware burned into a chip on the motherboard. Most of these NDVRs rely on Video Management Software (VMS) loaded on a network-attached client PC, however some have it ‘embedded’ in another motherboard chip, where it can be accessed from any PC through an Internet Browser. Most of these products have internal hard drives for local video file storage, but they can be inter-connected with Direct Attached Storage Arrays (DAS), Network Attached Storage (NAS) equipment or Storage Area Networks (SANs) through the LAN or WAN.

Network Video Recorders (NVR)

The ‘pure’ Network Video Recorder (NVR) is not a “turn-key box” or network appliance, but created with a combination of network devices. An NVR can be a standard network server with internal or attached storage capability along with recording software, video surveillance system or communication software and possibly even intelligent video analysis software. Digitization of the analog video is done by a separate ‘Video Encoder’ or ‘Video Server’ which is also attached to the Ethernet/IP network. Using an NVR configuration, true IP cameras can act as Video Servers and input images directly to the NVR and be managed directly by the NVR video software.

Video Encoders & Decoders

Encoders are used to take video signals in analog or digital form and make them suitable for transmission where bandwidth or storage capacity is an issue. Encoding applies to many video surveillance system applica­tions where digital recording devices are used or viewing across a network is desired. Analog signals must first be converted to a digital format, but then each source must be compressed into a smaller size file or video “stream.” There are several standards for encoding/decoding and compression; each has advantages and disadvantages. Typically the trade-offs are quality for reduced file size.

A decoder is a device that does the reverse of an encoder, undoing the encoding so that the original information can be retrieved. The same method used to encode is usually just reversed in order to decode. These are still relatively simple devices which can be a software program running on a PC, a DVD player or even a cell phone. They may also be hardware devices that take the digital video format and convert it back into an analog signal that can be displayed on a TV monitor. This allows the networked video to become switched across any output device. Usually the decoding and encoding functions reside in the same device and is commonly referred to as a “codec,” an acronym for code/decode.

Migration to a Digital Network Solution

Because there is significant financial investment in analog CCTV, many security managers opt for a phased transition to IP, blending both analog and digital security technologies wherever possible during the migration. Integrating existing analog equipment with products that provide the functionality of a digital system offers several benefits:

Remote accessibility
Cost-effectiveness
Flexibility
Scalability

In the simple illustration below, the analog cameras are connected to an analog video switcher, an analog monitor, a VCR and a video server. This traditional setup provides sequential monitoring and recording of multiple analog cameras. By connecting a video server to convert the analog video into digital data, images can be sent over an Ethernet/IP network (through a router/switch) which provides Ethernet connections for networked IP cameras. With this configuration, authorized security personnel in local or remote locations can view video originating from both analog and digital, networked IPcameras.
In the transition from analog to digital surveillance systems, no system is too small or too tightly tied to analog technology not to benefit from some measure of digital technology.

In conclusion the migration of a Digital Network Solution to your existing Analogy System can be done and still have the capability to add the latest software and hardware.
Some of the latest in security surveillance system software is the Dual Sensor as listed below in more detail.

The latest camera systems would be a combanation of network camera and high end analogy cameras.

The author of this is the managing director of sse installations Sydney Australia. Please visit us at sse installations for more details.

Be the first to comment - What do you think?  Posted by admin - June 28, 2010 at 4:23 pm

Categories: Video   Tags: , , ,

Divx Wmv To Video Converter

3gpp-3g2-3gp-converter.com( http://www.3gpp-3g2-3gp-converter.com )Today Divx WMV to Video Converter is in the limelight. We created the “World’s Most Popular Now!” award to help you find the best programs available for whatever you want to do, whether converting video or burning your favorite movies onto a DVD. Each program is rated on a scale of 1 to 5 in five different categories: UI skin, speed, ease of use, user rating and popularity. The program that comes out on top gets our award.
Today’s winners in Divx WMV to Video Converter are listed below. These ten programs are indisputably the best ones around. Any and all of them would be worth a download.

1. All AVSMedia products in one package Suite !

All AVSMedia products in one package! (AVS Video Tools + AVS Audio Tools + AVS Video Editor + AVS DVD Copy + AVS TV Box)

2. YASA Video Converter

A powerful video converter and can covnert AVI to 3GP,AVI to DivX, AVI to DVD, AVI to iPod, AVI to MP4, AVI to RM, AVI to WMV, AVI to XviD, DivX to AVI, DVD to PSP, MOV to iPod, MPEG to iPod, MPEG to RM, MPEG to WMV, RM to AVI, RMVB to iPod, WMV to AVI, WMV to iPod, WMV to MPEG, WMV to WMV.

3. Avex DVD & Video Converter Platinum Pack

Best Video Tools – Avex DVD & Video Converter Platinum Pack combines DVD Ripper Platinum, Video Converter Platinum and all DVD to iPod, PSP, 3GP, Zune Video Suite into one at steep discount.

4. Okoker AVI to DVD VCD DIVX MPEG Converter and Burner

It is a professional media conversion tool that can batch convert AVI/DIVX/XVID to DVD, VCD, MPEG, DIVX and Burn to DVD/CD. You can change the codec/system type to PAL or NTSC, and adjust the video size of the output files .

5. Cucusoft MPEG/AVI to DVD/VCD/SVCD Converter Pro

It supports convert AVI to VCD, AVI to DVD, AVI to SVCD, AVI to MPEG1, AVI to MPEG2. Cususoft AVI to VCD / DVD can not only convert AVI file, but also can convert almost all video file formats to VCD, DVD, SVCD and MPEG format.

6. WinAVI Video Converter

WinAVI Video Converter is super cool! is AVI Converter + Mpeg Covnerter + Batch Video Converter + Burn DVD VCD SVCD + Support almost all video formats, Convert all video format to AVI DivX XVid. Convert all video format to WMV, Convert all video format to RM.

7. Plato Video Converter

Expert at video conversion between AVI, DivX, XviD, MPEG, WMV, ASF, MOV, QT, RealMedia. Convert AVI, DivX, Xvid, ASF, WMV, WMA, MPEG, MOV, QT, RM, RMVB, file without losing quality.

8. ImTOO AVI MPEG Converter

A powerful AVI MPEG converter which can convert AVI to MPEG (MPEG1 and MPEG2), convert DivX to MPEG, convert WMV to MPG. The AVI MPEG Converter supports converting video file format, such as convert DivX to MPEG, AVI to MPG and convert DVD, VCD, AVI, WMV, MP4, MOV, 3GP, animated GIF, RM, ASF to MPEG or AVI

9. Xilisoft Video Converter

It can convert between almost all popular video formats including DVD, VCD, SVCD, MOV, RM, AVI, MPEG, WMV, MPEG1/2/4, 3GP, Xvid etc, and also convert video files to all popular audio files such as MP2, MP3, AC3, RA, M4A, OGG, AAC etc.

10. Apex Video Converter Super

Apex Video Converter Super Convert the formats of your video as you like. It is designed to meet all your needs of convert file between MOV, MPEG,VCD, DVD, WMV, ASF, RM, RMVB, AVI, DIVX, iPod, 3GP, PPC, xBox, PMP, MP4 formats.
source: http://www.3gpp-3g2-3gp-converter.com/article/Divx-WMV-to-Video-Converter.html

Today Divx WMV to Video Converter is in the limelight. We created the “World’s Most Popular Now!” award to help you find the best programs available for whatever you want to do, whether converting video or burning your favorite movies onto a DVD. Each program is rated on a scale of 1 to 5 in five different categories: UI skin, speed, ease of use, user rating and popularity. The program that comes out on top gets our award.

Be the first to comment - What do you think?  Posted by admin - June 26, 2010 at 4:17 pm

Categories: Video   Tags: , ,

Video Conferencing – a Consultants Perspective

Video conferencing has been tipped for the top for some time now, and finally its day has arrived. Here, Mike Entwistle, Managing Director for CCOMM Ltd, who started in the conferencing consulting space explains how the combination of the burgeoning ‘green’ movement, improved technologies, lower prices and a new generation that is ready and able to embrace video means that video conferencing will be the ubiquitous tool for communication in the 21st Century.

40 years ago the first video call took place, when AT&T introduced the Picturephone at the 1964 World’s Fair in America. Viewed as a fascinating curiosity at the time, it never actually became popular and was too expensive to be practical for most consumers. At its peak, the Picturephone service had only 500 subscribers, and the service faded away by the mid 1970’s.

Now, nearly four decades later, videoconferencing has come of age, with manufacturers such as Polycom, Tandberg and Life Size routinely selling tens of thousands of units a year worldwide. It’s a growing market. In 2005 video conferencing was worth about $1.15 billion globally, according to Frost & Sullivan. Now the market is expected to reach $3.1 billion by 2010, growing at a compound annual rate of 22.1 per cent. Another research firm Gartner is even more bullish, projecting the video conferencing industry to be worth $12.8 billion by 2011.

The success of YouTube and the rise of social media networking driven by sites such as Facebook and MySpace has made video today’s tool for smart, modern trendy users. Video overcomes the distance barriers and has ‘stickiness’ for today’s Y generation. Hundreds of millions of YouTube videos are watched each day, and even organisations are routinely posting their corporate videos on the site as a means of tracking comment and generating greater user familiarity. For example, companies such as Cadbury’s are fully embracing the new technology as demonstrated by the recent advert featuring a drum-playing gorilla, which gained more than 1 million views on YouTube.

All this activity, not to mention the environmental pressures, has made video conferencing an accepted method of communication as organisations of all sizes try to save time, and reduce their emissions and carbon footprint. Environmental issues have turned the spotlight on the excesses of corporate travel – not just airlines, but simply say, from one side of the county to another. For example, CCOMM works with North West police forces including; Lancashire, Merseyside, Cumbria, Greater Manchester and Cheshire, who use video conferencing for weekly staff meetings. Lancashire Police Constabulary covers quite a wide geographically dispersed area in the North West of England and found it was wasting an enormous amount of time, resource and money, while officers drove for hours just to reach these meetings. Video conferencing has saved each Constabulary time, travel budget, enhanced general communication and addressed some of their ‘green’ concerns.

Time spent traveling is time wasted, so organisations are looking for an alternative. It’s not so much air miles that are in demand these days, but carbon credits and video miles as a necessary measure of ‘greenness’. With carbon footprint reduction an increasingly important consideration for today’s businesses, video conferencing is one solution which can help meet corporate environmental goals by reining back on travel, especially once finance directors start seeing details of their likely ‘carbon allocations’.

According to one recent Gartner research note, “Gartner recommends carbon footprint reduction as a more sustainable long-term objective than carbon offsetting (such as planting trees to compensate for carbon dioxide output), and video will be a key component of that reduction strategy for many enterprises.”

However, it is not just green issues that have driven take-up of video conferencing. Technical developments too have made video conferencing a more user friendly and practical solution, less expensive than before to implement, and now offering better quality, on the desktop. These developments mean video conferencing is no longer solely the domain of the multinational. SME users too, hard pressed in running their own businesses, with no time to waste on travel are also prospective users. That’s why analysts believe video conferencing will continue to grow during the next few years, spurred on by instant messaging (IM), desktop collaboration, and the casual and more-frequent use of video conferencing as a mere click from the desktop.

As an integrator of videoconferencing solutions, we are also really starting to see the industry fly and we are gaining more enquiries year on year about our services and the end-users knowledge and understanding of the technology is certainly improving dramatically. There is no longer any mystique about video conferencing. Organisations want to be able to use it: not in video suites where they have to rely on a technician to use smoke and mirrors to get it to work, but on the desktop, where using it is ‘as easy as making a phone call’, integrated with key desktop and networking software.

In fact, video conferencing should no longer be seen in isolation but as an element of real-time collaborative communications which also include video, data and the Web, delivered through partnerships with Microsoft, Cisco, Avaya, and Nortel which help create efficient, high quality, more scalable solutions for business users.

Many IT executives already consider their organisations to be a ‘virtual workplace’ with, in some cases, over 60 percent of employees working remotely from their supervisors. The rise of IP video conferencing, whether from desktop or room-to-room, now provides a more cost-effective way to communicate with remote employees than ISDN-based video conferencing, with estimated paybacks ranging from 12-18 months for companies that replace ISDN video conferencing with IP systems.

Unlike the old perception of video conferencing as expensive to implement and jerky to watch, today’s desktop-based, IP friendly solutions are even flexible enough for someone to be patched into a conference while still in their car. You can even start with a phone call, and then ‘add the video’. That’s a long way from booking a video conference

The image quality offered by video conferencing has also improved markedly, to the extent that, with high resolution HD images, it is possible even to view stitching on products, or faults on printed circuit boards. That too has increasing ‘video conferencing’ marketability in the manufacturing sector. Audio bandwidth too (22 KHz) is now of the same quality you’d expect to have on your home audio system.

Looking ahead to 2008, organisations want to make collaboration more natural for staff who typically may be working in remote locations: from home, at other offices on a large campus, or with business partners in their offices. Voice or video on the desktop, at users’ fingertips, offers the prospect of potential ‘instant’ collaboration every time the phone rings and avoids having to book a room for video conferencing. Such a desire for instant collaboration, allied to more efficient use of working time and the need to cut greenhouse gases and rescue the environment, means it is no exaggeration to describe video as ‘the communications medium for today.

Tim Vincent is a leader on the subject of Video conferencing and video conferencing equipment. For more information on this subject please visit http://www.ccomm.co.uk

Be the first to comment - What do you think?  Posted by admin - June 24, 2010 at 9:42 am

Categories: Video   Tags: , , ,

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