Posts Tagged ‘ video images’



Bus Surveillance Cameras

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Tuesday, December 13th, 2011

Bus Surveillance CamerasIf you are a school bus driver and you have bus surveillance cameras, you know what a blessing they truly are.  Equipment that is visible (whether it’s actually working or off) has an incredibly large deterrence factor.  This doesn’t apply to just school buses but all kinds of buses and public transportation.

What is different on bus surveillance cameras than on regular surveillance cameras?  First, the whole system is a bit different.  Here is why.

A typical digital video surveillance system consists of one or more cameras, a Digital Video Recorder or DVR, and a monitor.  The cameras capture the video images, process them and send them to the DVR where they are processed further and saved on the DVRs Hard Disk Drive (HDD).  The HDD on a typical surveillance system is the same type of disk drive that is found on a personal computer.  It can hold terabytes of information but doesn’t do well when under the forces of vibration.

Bus surveillance camera systems are a little different.  First and foremost is the DVR.  The vibrations for normal travel of the bus are libel to make the hard disk skip and not record the video images properly.  Now there are many different types of bus surveillance systems and accordingly corresponding DVRs.  However the one thing that bus surveillance camera systems have in common is that most of these systems use non-moving parts.

They are able to endure very harsh environments making them well suited for
high risk vehicle applications like school buses, law enforcement, EMS,
transit, taxi, service or delivery vehicles that require rugged solid state
dependability for video evidence.

Creating a system with non moving parts is important because of the vibrations that are created by the bus.  The bus surveillance camera system must be able to work properly in spite of that factor.  SO how do they do it?  Most bust surveillance camera systems use a “no moving parts” SD recorder system.  All of the footage is saved on the SD card and when it’s full you just pull that card and insert another one or re-write over the one that’s already in the DVR.

These SD cards can be removed and inserted into a computer to view or store any of the media that is on the card.  The technology for creating these cards is constantly improving yielding greater and greater storage capacities.  Today, they can easily place a 2 hour trip on one card.

Bus surveillance cameras come in many configurations as well.  Some units are made with the camera, DVR, and monitor all in on piece.  Other units allow for the DVR to be mounted somewhere on the bus while up to four different cameras can be used for more comprehensive coverage.  Some of these multi camera systems are able to record all four cameras at once in D1 resolution.  Furthermore these multi bus surveillance camera systems, because of the larger separate DVRs can have record times of 60 to 200 hours!

Another benefit of bus surveillance cameras is that not only can they record unsafe or dangerous activities of the passengers but they can also record unsafe or reckless driving activities of the bus driver offering dual protection.  The following is a list of just some of the passenger activities that have been documented already on buses (school, public transportation, etc.):

  • Civil or criminal violations of the law
  • Drug use, sale, or distribution
  • Gang related activities
  • Vandalism such as cutting the seats, graffiti on bus surfaces
  • Sexual acts with or without consent
  • Throwing objects out the windows
  • Assaults, abuse or other harassment against the bus driver
  • Alcohol abuse or smoking while inside the bus
  • Standing or walking in the bus while the bus itself is in motion.

As we mentioned earlier, bus surveillance cameras provide dual coverage because they can provide documentation of the activities of the passengers as well as the driver.  Here’s a short list of driver related activities that have been documented:

  • Running red lights or stop signs
  • Failure to stop at railroad intersections
  • Bus driver, while driving, is drinking, eating, sending text messages, or using their cell phone for casual conversation
  • In vehicle driver passenger interaction, arguments, or abuse
  • Accident can be documented with the video used in court as evidence

If you are interested in more information concerning bus surveillance cameras, contact one of Security Camera King’s security experts today.

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IP Cameras Security Surveillance

Written By:
Friday, January 7th, 2011

One of the ever increasing most popular digital video camera security systems is the IP cameras security surveillance. This camera system is unique in that it utilizes the internet as a medium for sending video images and remotely controlling the camera making accessibility nearly ubiquitous throughout the world.

There are a few variations on the theme on how these cameras and/or camera security systems operate, but the end product is the same. A digital video file that can be viewed virtually anywhere there is broadband internet access and stored on a personal computer’s hard drive for later use or archiving.

Let’s take a quick look at an average standalone digital video security camera system and how it works so we can better understand how IP cameras security surveillance systems work. A standalone system is so named because it can be used by itself without any additional outside equipment (i.e. other than the standard system equipment, no additional PC or other device for example is required).

A typical standalone digital video security system contains one or more digital video cameras, a Digital Video Recorder or DVR with a Digital Signal Processor or DSP, and a monitor. The digital video cameras in these systems capture light images and transform them into electronic video images. The camera normally contains an analog-to-digital processor chip that sends the video image data in binary or digital form to the DVR unit.

The DVR unit consists of three primary types of devices; the Hard Disk Drive (HDD), the DSP previously mentioned, and any additional peripheral type devices such as CD or DVD recorders to make portable copies of video files. The digital signal comes from the camera via an RG-59 coaxial video transmission cable to the DVR unit. Each individual camera must have its own cable run from the camera to the DVR unit.

When the data reached the DVR unit the DSP processes the data, applies a COmpression/DECompression utility (or CODEC) that greatly compacts the information and reduces the final size of the digital video file. The digital video files is then viewed on a monitor (live) and/or saved to the HDD for later use.

IP cameras security surveillance systems differ in that they normally connect to the Internet instead of using a video transmission cable to relay the camera data to the DVR unit. Furthermore, IP (which stands for Internet Protocol ready) cameras do this normally by one of two methods; either the data is sent via a Cat 5 Ethernet cable to a router or modem or wirelessly to a wireless router or wireless modem.

Using the internet, especially the wireless technology, creates a great advantage for this system. Once the signal make it to an Internet connection the cameras can be viewed and/or controlled from anywhere in the world that broadband internet is accessible. This includes working in tandem with devices such as a Personal Computer or Mac Computer, iPhones, iPads and the like, and many 3G and 4G smartphones. Literally, you can see what is going on at home in Miami when you are on business travel in Paris.

Another advantage of the IP cameras security surveillance system is the ability to use wireless internet technology. This eliminates the need to run the RG-59 coaxial cable from each camera to the DVR unit, greatly reducing installation time and making the process a do-it-yourself project that is a snap.

IP cameras used for security surveillance are able to work by processing the video signal on board and sending it via the camera’s on board web server technology. A variation on this theme is the IP DVR. In this instance the standard cameras are used in conjunction with the DVR but the DVR has the IP capability and is connected to a router or modem. The files are stored on the DVR units HDD but are accessible via the internet to the user.

On the receiving end of an IP camera security surveillance system that uses a personal computer the digital video files are stored on the computer’s HDD and viewed on the computer’s monitor. Normally this systems work in tandem with common internet browsers such as Internet Explorer, Safari, etc. Installation setup normally consists of a self installing software CD so for many systems no prior computer networking knowledge is needed.

Security Camera King has a full line of digital video security systems. Contact one of our experts today if you are interested in purchasing an IP cameras security surveillance system.

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