Posts Tagged ‘DVR’


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Nanny Cams

Wednesday, December 28th, 2011

Nanny cams are hidden cameras that have been installed in common, every day household items.  The camera is used (secretly) to monitor and record the daily activities of home caregivers; hence the name “Nanny Cam.”

A Nanny cam can be used remotely, where it’s video is transmitted by radio waves to a receiver hooked up to other devices (Digital Video Recorders or DVRs, sent over the internet,)  or you can use a “hardwire” run which, unless your careful, will more than likely stick out and be easily seen.

Are Hidden Nanny Cams Legal?

It is generally legal to videotape nannies without their permission; however, using cameras with audio can impose legal ramifications since it may fall under “eavesdropping” or “wiretapping” laws governing use of a device with an audio component to tape a sitter without consent.  These laws vary from state to state. Check with your local laws to confirm.

We all have expectations of privacy in private places. But should we expect privacy in the home of another? The answer is “NO.”
Parents and other proponents of nanny-cams argue that the installation of a hidden camera in their own home is not an invasion of privacy.

The court has agreed. In State v. Diaz, 706 A.2d 264 (1998), the leading case on this topic, the court ruled that a videotape made by a hidden camera in the residence of the parents of the child was admissible as evidence in the lawsuit against the nanny for assault and child endangerment. The court decided that since there was an absence of state action, the Constitution did not protect the nanny’s privacy in someone else’s house.

The court also held that a videotape without sound did not violate the Wiretapping and Electronic Surveillance Control Act, but furthermore, that sound was admissible because the parents had consented to their child being taped.

States vary on this particular issue, but most agree that a videotaping your nanny without her knowledge is perfectly legal so long as there is no sound. Audiotaping without the nanny’s consent is an issue upon which the states are split.

There are a variety of reasons people choose a Multi Camera System. Many parents who are using a nanny service for the first time want to make sure that their choice of a nanny is good. Many times you will find out about a nanny’s behavior in the first month or two. The fact that one’s child has been entrusted to someone you hardly know can be a big leap of faith. Parents may be concerned about a sitter’s everyday behavior such as smoking or cursing, or they may have greater concerns of whether the caregiver is paying enough attention to the child, or is physically or emotionally abusing the child.

“I want to know when I leave and close that door what’s going on behind it. I want to know my child is safe and being nurtured, played with, sang to and loved,” says Maria. “I think the ethics go right out the window when it comes to protecting our children. Caregivers are paid to keep your kids safe and happy, not to get mad at your kids, yell at them and hit them or put them in a swing all day and neglect them.

Most nanny cams are set up so they do not record audio but do record video.  There’s a very good reason for this.

According to the US Code Title 18, Chapter 119, Section 2512 prohibits the interception of oral communication by “surreptitious manner,” such as a hidden camera, and so most nanny cams are not available with audio recording. Though some on the market may be available with the ability to record audio, these cameras should not be used due to the illegality of the recordings they produce. Nanny Cams are legal in all 50 states,but it is illegal in 13 states to record audio without express, or written consent of the nanny being recorded. This falls under the federal governments wire tapping laws.

However, there’s also a very good solution for all of this and that is purchase whatever kind of camera you feel most comfortable with and when installing it, simply do not connect the audio.

Why Use a Nanny Cam?

“2008 – A couple said they did everything possible to make sure the child was in safe hands when they discovered abuse by the nanny by using a hidden nanny camera.”

“Stephanie M. the subject of a widely publicized nanny cam video recorded by her employer faces two misdemeanor counts of child abuse in Cary, North Carolina.”

“A Florida nanny is behind bars for allegedly abusing an 11 month old child.  The abuse case was captured on a hidden nanny cam.  Investigator Adrian K speaks about some warning signs of abuse cases.”

“Nanny cam captures abuse on tape; A Florida babysitter is jailed after video shows her slapping an infant.”

Unfortunately, there are many more incidents like those listed above.  These real examples do indicate a very strong case for the use of a nanny cam.  The use of a nanny cam is not limited to monitoring the care of an infant.  The use of a nanny cam can not only protect children but may be able to support a nanny or baby sitter when children make untruthful claims of abuse to their parents.  The bottom dollar is anytime it’s necessary to keep track of who’s watching who the nanny camera setup is an excellent choice.  And the camera doesn’t lie.

What Exactly is a Nanny Cam?

A nanny cam is a digital video camera that may be hidden, disguised, or even fully exposed  and is used to monitor the day to day activities of your nanny and child(ren).  There may be one or more cameras based on the type of coverage you desire.  For example some parents feel comfortable placing just one camera in the child’s room, nursery, or play area.  Others prefer to have coverage in just about every room in the house; the choice is yours and with today’s high tech cameras and Digital Video Recorders (DVRs) it is not only possible but economically feasible as well so the average family can easily afford a digital video surveillance system.

How Do Nanny Cams (or Cameras) Work?

The following is a brief description of the technical aspect of typical digital video camera:

Digital video surveillance and security cameras have gone through many changes over the past few years and are ever changing with the increases in technology.  Older systems used strictly analog cameras with analog video recorders.  A bit of irony exists today because “digital” video cameras today still produce an analog image but it is converted to a digital image before it leaves the camera.

Nanny cams basically consist of three major components: 1. The lens; 2. The sensor chip; and, the Integrated Circuitry (IC) or IC chip.

Let’s begin our description with the lens.  The lens’ primary function is to capture light reflected from objects in its field of view and focus them onto the tiny sensor chip that converts the light energy into electrical energy.  Lenses may be specified as fixed or varifocal.  A fixed lens cannot move and the angle of vision or field of vision is fixed at one particular size.   A varifocal lens can move in and out changing its focal length and thereby changing the angle of the field of vision from wide to tight.

The aperture is also considered part of the lens.  The aperture is diaphragm type hole that the light must pass through as well.  This is for controlling the amount of light focusing on the sensor chip.  Generally, a very bright shot requires a small aperture so the shot is not completely washed out with light.  Under conditions when there is not enough light, the aperture opens fully to let as much light in as possible.

Once the light passes through the lens and aperture it strikes a photoreceptive sensor.   There are actually two different sensors that are available for use when manufacturing a nanny cam.  Each works in a different way yet they bear the exact same results; transferring light energy into electrical energy that can be measured.

One of the sensors is called a Charged Coupled Device or CCD and the other is called a Complementary Metal Oxide Semiconductor or CMOS.  Each of these sensors come in different sizes but for a typical high-quality nanny cam they are usually 1/4 or 1/3 inch square.  As the focused light strikes the surface of the CCD or the CMOS the sensor transfers the light energy into electrical energy which can be measured and manipulated to create a digital video image that can be viewed on a monitor.

The camera is basically the same as a camera that creates photographic images.  The difference is the nanny cam takes several photographic images, usually from 7 to 30 per second, also called frames per second or fps.  At 30 fps the human brain is fooled into thinking that it is seeing fluid motion.  This is the same concept that has been used for years in the motion picture industry.

On inherent quality of both the CCD and the CMOS is that they are also sensitive to Infrared Radiation, specifically IR in the near zone of the IR spectrum.  This means that by using IR Light Emitting Diodes as spot lights, these cameras can “see” in total darkness.  The human eye however, cannot see the light created by the IR LEDs which makes these cameras excellent for monitoring dark rooms.

The DVR

The DVR for a nanny cam can be a typical DVR that is used with a complete system or the camera may contain a “built in” DVR so that the camera and DVR is all one self-contained unit such as the pen camera.  The ink pen camera is a working ink pen, a camera, and a DVR all in one unit (this is a good example of how technology is used in the video surveillance industry).  When the user is ready to review the video footage they plug the pen into a USB port on their computer and sit back and watch the footage.

Other camera/DVR single units may use SD cards, Mini cards, USB Flash drives, and other portable memory media as their DVRs.

What Camera Do I Use?

Security Camera King has many hidden or disguised cameras that make excellent nanny cams. Below is a partial list of just some of the cameras or camera/DVR combinations available:

  • Button cameras – this cameras are actual buttons an come with extra buttons that are the same type as the one used on the camera to complete its total disguise;
  • Phillips head screw camera – That’s right a camera the size of an average screw head!
  • Desktop speaker camera – These look and work like typical computer desktop speakers but with one difference, one speaker has a camera inside;
  • Wall clock and alarm clock cameras;
  • A wall heater/air conditioning thermostat–although the thermostat does not actually work the hidden camera inside does;
  • Circular vanity mirror with touch activation;
  • Carbon monoxide or smoke alarms – these units usually don’t work as alarms but the do a great job of hiding the camera; and
  • Telephones and even a Tissue Box with embedded cameras.

Of course this is not a complete list of available cameras from Security Camera King but it should give you a good idea of what is available.

This still doesn’t answer the question as to what camera to use, but at least you have a better idea of what is available.  First, you need to determine how extensive your nanny cam coverage will be so you know how many cameras you will need to do the job.  As mentioned earlier, it can be a s few as one camera or as many as several.

The next step is to determine if they will be overt or covert cameras.  If your monitoring is overt standard box, bullet, or dome cameras would be sufficient.  On the other hand, if your coverage is going to be covert, you need to consider what type of disguised or hidden camera will satisfy each location.

If you determine that you only need one camera, a standalone hidden camera/DVR unit may be the answer.  However, if you desire entire home coverage with say, 8 cameras, it may be best to install a digital video security and surveillance system with a full-service 8 camera DVR.

And finally a word of caution.  Each state has different laws governing the use of cameras and especially audio recorders without the subject’s knowledge.  Make sure you confirm your state’s laws before attempting to record anyone covertly.  This doesn’t mean that you can’t record improper or criminal activity but planned, deliberate, covert recording may require special concessions on the part of the person recording.

As you can see, with a little guidance and pre-planning setting up your own nanny cam really isn’t difficult to do.  If you do encounter problems contact Security Camera King’s security experts and they’ll be glad to answer any questions you may have and get you up and running fast.

If you neeed more information on nanny cams contact one of Security Camera Kings security experts and they will answer any additional questions you may have.

 

Micro DVRs

Thursday, December 15th, 2011

Micro DVRsThere are certain applications for surveillance and security where a “standard” Digital Video Recorder or DVR is just too large.  For these applications the best choice is a micro DVR.  Micro DVRs can be so small as to fit inside the casing of an ink pen.  Let’s take a look at a digital video system that uses standard size DVRs first, and then take a look at micro DVRs.

A standard DVR is about the size of DVD player.  The front of the DVR has buttons and switches to control the actions of the DVR.  The back of the DVR is where all the connections are made to cameras and other items.

A typical DVR has space for at least one hard disk drive; some have room for 3 or more plus a CD/DVD writer.  Like the camera, the DVR has Integrated Circuit (IC) chips dedicated solely to digital imaging.  These chips are known as Digital Signal Processors or DSPs.  Most standard DVRs these days also come with several other features that may or may not take up more space inside the DVR.

The DVR’s recording and storage unit is the “hard drive” also known as a Hard Digital Drive or HDD.  This hard drive is a relatively large device when compare to things like IC chips.   The hard drive contains magnetic plates that are written on by a magnetic head.   Since the device is digital the only thing the disk contains is a series of 0s and 1s.

The hard drive actually spins the platters (disks) usually about 7200 RPM while the magnetic head does the writing.  These are great for storing large amounts of data. However they are very intricate as well.  The space between the magnetic head and the platter is less than that of the thickness of a human hair.  This typically means that these devices are very sensitive and were not designed to take a lot bumping, vibrating, and the like.

In contrast, micro DVRs are very small.  There are no moving parts on a micro DVR.  That’s because micro DVRs use RAM (Random Access Memory) memory instead.  There are no moving parts on micro DVR because they do use RAM type memory.  The data is saved on RAM which has no moving parts.

This used to make micro DVRs nearly impossible to own because of the incredibly expensive RAM memory storage devices that include SD cards, Flash thumb drives, mini SDs, etc.  However, great strides have been made in RAM memory technology and today it is not cost prohibitive to purchase an SD card with 8 gigabytes of storage room.

In addition, video images can be incredibly large.  That’s because a video image is really nothing more than a digital picture taken many times in succession in a short period of time.  Typically, smooth video is obtained by taking from 15 to 30 pictures a second.  Let’s consider how much memory would be needed for just one hour of uncompressed video.  Most photographs these days run about 1 megabyte in size so will use this figure for our calculation:

1 MB (per picture) X 30 pictures (also called frames) per second X 60 seconds in 1 minute X 60 Minutes = 108,000 MB for one hour of video

However technology has also greatly improved in another area as well.  In addition to storage the micro DVR and even a standard DVR normally compress the files by using a CODEC (COmpression/DECompression) utility.  A CODEC shrinks the size of the video file while maintaining high quality of the video itself.  It does this by using special mini programs called algorithms that save space by not repeating the same objects.   For example, if a picture is taken of a football game with the sky in the back ground, the sky usually doesn’t change it’s appearance much.  A CODEC only saves information for the sky one time there fore reducing the overall size of the video image.

Micro DVRs take advantage of this as much as possible to extend their recording times on the portable recording media.

Where are micro DVRs used?  You’ll most likely find micro DVRs on all small specialty cameras such as hidden or disguised cameras.  Some of these camera are so small they do not have the option of saving their data on portable media that can be removed and replaced.  These cameras usually have a USB patch cord that they connect to almost any computer to download their files so they can be watched on the computer.

Bus Surveillance Cameras

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.

High Resolution Security Cameras

Monday, October 10th, 2011

Constantly improving technology is producing high resolution security cameras.  A high resolution security camera is like watching your television in High Definition (HD).  The higher the resolution, the better the detail and clarity of the picture.  High resolutions cameras are generally more expensive than lower resolution cameras but even today’s prices are lower than a few years ago.

Unfortunately, this concept of resolution and high resolution can be confusing.  So let’s take a look at a little background information that will help to understand the high resolution security cameras just a little bit better.

The term resolution can be confusing because it is used to mean different things depending on the device that it refers to.  We are going to explain this by working backwards, that is talking about the resolution of the monitor and the Digital Video Recorder or DVR first and then talk about the high resolution security camera.

The DVRs primary responsibility is to store the digital video file on its Hard Disk Drive or HDD and to send it along to the monitor(s) for viewing.  Prior to the “digital age” the camera signals were saved on magnetic tape in analog form (One interesting note is that even today the camera’s sensor creates the electrical impulses to create a video image but the data for this is initially analog.  The camera uses a Digital Signal Processor or DSP to convert the analog into digital form.)

Today’s digital monitors produce pictures with tiny dots called pixels.  There is no standard measurement for a pixel, but the larger the monitor and the larger the resolution of the monitor, usually the smaller the pixel size.  The smaller the pixel size the greater the detail of the image.  So quite often a smaller monitor will show an image at a bigger size then a large monitor (due to a larger pixel size).  But if the image has more pixels than the size of the smaller monitor, you will lose some of the image.

When speaking in terms of analog picture resolution, most security camera companies default to the older analog measurements.  Analog monitors are basically televisions.  Televisions produce a picture by using a Cathode Ray Tube or CRT.  The CRT scans the back of the TV viewing surface from left to right creating a horizontal line.  This line is repeated every other line.  The greater number of lines the greater the detail of the picture.  A High Definition or HD TV or monitor can display up to 1080 Television Lines or TVL per image.

Analog television has its own terms for defining detail and clarity.  They are CIF, 4CIF and D1.  Without going into too much detail, here is there approximate size translated into pixels:

  • CIF = 360 x 240 pixels
  • 4CIF = 704 x 408 pixels
  • D1 = 720 x 480

Now for the high resolution security cameras terminology.  Slowly, as more cameras are used on the Internet and in strictly digital circumstances the resolution of the camera will be stated in digital (pixel) format instead of TVL.  For example Security Camera King has available for purchase Product# IPBC-EL3MP 3 Megapixel IP Network Box Security Camera.

However, must of the digital cameras and especially the high resolution security cameras are still being marketed based on their TVL resolution.  For example the Vandal resistant dome camera offered with the bundled packages, Product# OD-LX420IR50 is marketed as a 420 TVL resolution camera.

Generally speaking (there is no golden rule on this) to give you an idea of what the TVL resolutions mean we will try to categorize the cameras based on resolution.  For example many hidden or disguised cameras produce a video image that has a resolution of 380 TVL.  This camera is certainly not considered to be a high resolution security camera, but taking size and everything else into account it’s not a bad resolution.

Typical resolutions for standard cameras range somewhere between 420 and 500 TVL. High resolution cameras start at about 550 TVL and currently go as high as 700 to 750 TVL.  Also the higher the resolution of the camera usually the higher the price.

If you have any other questions concerning high resolution security cameras or you are interested in purchasing a high resolution security camera, please contact one of our security experts today either by on-line “Live Chat” or by telephone at 866-573-8878 Monday through Friday from 9 AM to 6 PM EST.

2.4 Ghz Wireless Hidden Camera

Monday, October 3rd, 2011

Sometimes cameras need to be placed in areas where wiring would obviously give away the fact that the camera is hidden.  When this is the case a 2.4 Ghz wireless hidden camera is the perfect solution for the job.

Unless a camera has its own “on-board” Digital Video Recorder or DVR, it will need a video transmission cable, commonly RG59.  However a 2.4 Ghz wireless hidden camera can eliminate the need for cables by sending the video transmission signal via radio waves.

It sends the radio waves using an on-board transmitter and antenna that use the 2.4 Ghz technology.  This is the same technology that is often used by many land-line based wireless telephones.

The 2.4 Ghz technology offers powerful and clear transmissions and is an excellent choice for wireless technology for digital video cameras.  However, this type of wireless communication is also known as Line Of Sight or LOS technology.  LOS refers to the method by which it transmits and receives and the fact that impeding objects can affect the transmission be reducing the maximum range of the camera.

LOS means that the maximum transmission range of the signal is as stated as long as the camera antenna and receiver antenna have a direct, unimpeded distance between them.  Also, the physical makeup of the object(s) will also contribute to determining how much the range may be reduced.  Trees, walls, glass, buildings, and other objects that are between the camera and the receiver all have an effect of reducing the manufacturers’ stated LOS range.

It’s important to understand this concept because if you know that the distance between where you want to mount your camera and where your receiver is, is 500 feet and your camera is rated for 500 feet but there are objects like trees and a couple of walls between the two, it is likely that the range will be reduced and the receiver may not be able to receive the signal.   If this is the case, it may be beneficial to try using a camera with a 1,000 foot range instead.

Security Camera King has many different types of 2.4 Ghz wireless hidden cameras available for purchase.  Some are designed to work with a DVR and others may just be designed to transmit to a monitor (a baby monitor is a good example of this).  The following list is a partial list of some of the 2.4 Ghz wireless cameras we have available for purchase:

  • Product# HC-BTNCM-G — Black and white hi resolution button camera*
  • Product# HC-SCREW-G — Black and white screw camera
  • Product# HC-BBMNT-GC — Toy dog baby monitor
  • Product# HC-MOTIOD-G — PIR Motion Detector
  • Product# HC-WALLC1-G — Black and white wall clock
  • Product# HC-EXITS-G — Black and white Exit sign
  • Product# HC-DSKSP-G — Desktop speakers
  • Product# HC-VNTMR-G — Vanity mirror with Touch Activation
  • Product# HC-CBNDT-G — Carbon Monoxide Detector
  • Product# HC-WNDTN-G — Black and white wind tunnel camera
  • Product# HC-ALARC-G — Black and white Alarm clock camera
  • Product# HC-CORPH-G — Cordless House phone camera
  • Product# HC-BMBOX-G — Black and white CD/Boombox camera
  • Product# HC-ANMCK-G — Black and white suspended animation clock camera
  • Product# HC-CBNDT-GC — Carbon monoxide detector
  • Product# HC-ELCBX-G — Electrical utility box camera
  • Product# HC-ARWCK-G — Air Wick Air Freshener Camera
  • Product# HC-TISSU-G — Black and white tissue box camera

*Most of the cameras above that are listed as “Black and White” are also available in a “Color” version as well.

As you can see, a 2.4 Ghz wireless hidden camera can be disguised in many ways.  The above list is only a partial list; we have even more cameras to offer than this.

One last word of caution.  Each state has different laws governing the use of cameras and especially audio recorders without the subject’s knowledge.  Make sure you confirm you state’s laws before attempting to record anyone covertly.  This doesn’t mean that you can’t record improper or criminal activity but the planned, deliberate, covert recording may require special concessions on the part of the person recording.

If you are interested in purchasing one of these cameras or have any questions at all, our security experts in our support team will be glad to help you.  To contact one of our security specialists you can use the on-line “Live Chat” feature or telephone 866-573-8878 Monday through Friday from 9AM to 6PM EST.