In understanding MPEG-4 vs. H.264 Video Compression it’s important to know that H.264 are also both MPEG-4 technology as well. MPEG-4 actually consists of 22 Parts elements, many of which have not been implemented or used yet. MPEG-4 become a world standard because of simplicity, it has become widely known of as MPEG-4. This is because MPEG-4 doesn’t require as much processor speed or memory as that of H.264/AVC because it’s decoding algorithms is less complex.
H.264 is actually the same thing as MPEG4. They refer to another part of MPEG-4 called MPEG-4 Part 10. So you can take chose at what you would like to name it. MPEG-4 Part 10 consists of Advanced Video Coding and uses higher level profiles than that of MPEG-4 Part 2. This type of decoding is more complex and requires more computer processor speed and memory because it uses more complicated decoding than MPEG-4 Part 10.
For security Camera application most DVR used today are using the MPEG4 compression, recently more and more professional DVR’s are converting to h.264 technology , because of its low CPU conception, which allow DVR the function with 32 or more camera without existing the computer resources .
H.264 has advantages when transmitting over WAN / Internet connection. Because it algorithms the video transmitting is faster.
Range of ambient temperatures over which a Security camera can be operated safely. The operating temperature is minimum or maximum temperature the device will perfume without picture or operation failure. Incase the environment that the security camera will be placed is higher or lower the operating temperature, a cooling or heating module should be add. In outdoor Security camera were the temperature is higher or lower the operating temperature, housing with heater or blower will let a security camera function in extreme temperature.
CCTV Camera and security DVR system technology is advancing at a blistering speed. So fast that by the time you purchase your new CCTV DVR, it’s probably already obsolete or out of date. A simple observation of home security and security camera will tell you security cameras are everywhere these days. Security camera and Security dvr solutions are one of the best options available to monitor your home or business operations and ensure safety. Security cameras provide you the ability to record and remotely monitor all the activity at your home and nearly everything they do. With the improvement of video technology and low cost of CCTV equipment, security camera are located in any time of business and place, from small store to corporate company and, if you look around, you will find them in every conceivable place.
Home Security camera Types
A security camera for homes comes in many different styles including dome camera, bullet and infrared camera. c-mount camera is more widely used in businesses and not home because of their size and esthetics . Each security camera serves a different purpose. finding the one best suited to your needs, you should consider several factors, such as whether you will use the security camera indoor or outdoor, during the day, night time, or both.Bullet security cameras are the most popular home security camera nowadays. They can be used either indoor or outdoor. Bullet security cameras are available in B/W or color and they come with the mounting hardware.
Bullet security cameras body casings are weather-resistant and water proof, and do not require any Camera Housing.
Bullet camera comes with fix lens or Vari Focal lens that allows you to see facial features out to about 1 – 80 feet and offers a 70-90 degree angle of view. This is the widest angle one can have without distorting the picture.
Bullet security camera Resolution levels for B/W security cameras extend to about 420 lines, any higher and the benefits are minimal,in Bullet color cameras, higher resolution implies better picture.
Infrared security cameras are also very popular because they produce an image in little or no lighting conditions. Infared security cameras looks like the bullet style and can be used indoor or outdoor. These cameras have infrared leds installed around the outer edge of the lens, which allow these security camera to produce picture in no light for up to 300 feet and even further depend on the camera type, amount of led and strength of the infrared light. Each infrared camera will specify the effective distance of the infrared light.
A relatively new type of security camera is the day/night security camera. This particular type of camera has an extra sensitive imaging chip that allows it to capture a good picture in low light situations without using infrared LEDS. This is especially handy in outdoor applications since infrared security cameras do not work well outdoors. Unless the infrared security camera is installed all the way up to the glass of the housing, the infrared lights can reflect off the glass and subsequently degrade the image.
When you’re shopping for a security camera, you’ll find that there are lots of options available. You can call Security engineer at DVRMaster.com to get more information on your option and support.
Most crimes are not impulsive, criminals usually check an area before they strike. If they see a security camera outside your house or business, it can deter them from robbing your place.
Wireless security cameras are ideal for camera location where cabling is too costly or very hard to run. Today wireless kit is available and can turn any security camera to a wireless camera. You can use wireless camera that the wireless is built in to the camera. This kind of camera is limited because one cannot adjust between the wireless camera and the distance. Wireless kit let you choose the right kit that fit your needs. Wireless kit distance can rand from 300 ft to 5 miles.
Advantages and disadvantage between wireless security cameras and wired security camera:
- Wireless kit – A wireless security camera can be relocate to different locations while a wired security camera is difficult to move.
- Temporary camera Location – in a situation where a security camera is needed for a temporary solution or temporary location. Wireless camera is a good idea in situation that does not need constant monitoring or need a temporary monitoring.
- Picture Quality – wireless camera is more susceptible to picture distortion and interruption, wire security camera promise you clear picture with no outside interruptions.
Wireless kit can turn any camera to wireless camera
Surveillance Security cameras are becoming an integral part of home and business security systems. Today these systems are more popular and affordable to the average person. From small home to large corporation are seeing the benefit of monitoring a premises 24/7 with security cameras. Today security cameras are available for your home and office needs, no matter how simple or how complex a setup you require.
Monitoring and recording all the activity in your office become a necessity to control inventory and reduce liability in a common office or warehouse area. — These are just four reasons why you would want to purchase a surveillance camera. If you put your time, energy, and resources into these, why not take the extra step and insure what matters most to you? Video Security Cameras designed specifically for surveillance, monitoring and remote monitoring of a given area, and provide an extra measure of safety and security.
What types of cameras available for video surveillance?
You have a range of Security video surveillance cameras available to you. To make a wise decision selecting the right security camera to the right environment you need to understand the differences between the type of camera available.
Dome Security Camera
Dome cameras will give you professional grade pictures in convenient dome housing. These Dome cameras work great offices in department stores, jewelry shops, convenience stores and professional business environments. Dome camera are perfect solutions for DVR Camera in Low ceiling are and places where esthetics surveillance is in need. Dome camera runs on 12VDC.
Box – C Mount Security Camera
The CCTV Box Camera combines high 380 to 570 TV lines of resolution and a 0.01 lux low light. The advantage of Box CCTV camera is the ability to purchase the camera and the lens separately. This advantage will provide you the ability to fit between the camera and the environment. This camera is perfect for high security and retail store front applications. With your choice of either 12VDC or 24VAC it can be used in any security DVR system.
Infrared Security Camera
You can use a night vision security camera in any darkened area, Infrared camera an view area in total darkness ( 0 lux), comparing to day night camera that need some light to produce a reasonable picture. With a night vision camera, you can check out these darkened spaces and eliminate any unwanted surprises.
Bullet Security Camera
This is the perfect camera for harsh outdoor or indoor environments where you need a compact color camera. Bullet camera is ideal for home and small business environment because of its small size. You’ll get great pictures 380 to 480 lines of resolution and low light Lux at 1.0. With the advanced back light compensation, you’ll have crystal clear images throughout the day. Bullet camera is powered by 12-Volt DC.
Hidden Security Camera (Covert surveillance cameras)
These cameras look like regular items. A wall clock in a small store, A smoke alarm in a warehouse, a teddy bear in a baby’s room, a pin hole in any wall—each one of these could very easily be a surveillance camera. You can record and watch remotely without anyone knowing
Wireless security cameras – Any CCTV Security camera can be turn in to a wireless camera by adding a wireless kit, to deal with location which running cable is a difficult or not esthetic solution. These offer more flexibility in set up. They are easy to install, can be moved easily.
Security DVR system, i.e. surveillance system has become an integral part of your home or business security solution. When searching to purchase a Security camera or security DVR, you will find that there are certain decisions you need to make before purchasing your first security DVR. There are two basic types of DVR’s available: a stand alone DVR and a PC-based DVR. A stand-alone DVR is a unit that looks like a VCR but is actually a computer running on a Linux base or proprietary operating system designed to function by itself as a digital video recorder. A PC-based DVR is a Regular computer, with a DVR capture card installed and configured, which basically transforms the basic computer into a full functioning DVR system. The system usually runs on windows XP or Linux, which perform on the same basic functions. We will explore each in a little more depth below.
Stand-alone Security DVR System
A stand-alone DVR is a computer board built on one complete circuit board. It looks very similar to a VCR, but it has the entire components that a regular computer has. The system runs on an operating system that is built into a chip / flush memory. For that reason Stand-alone DVR’s are extremely reliable and very easy to install and use. They are usually managed and configured by a remote control like a VCR. The software is built in to the flush memory as firmware and is separate from the data stored on the hard drive.
PC-based Security DVR System
PC-based DVR is a DVR Capture Card built inside a computer. The system is either a tower or a rack mount. Installed within the system is a DVR capture card. This board captures the video from the cameras and works with the DVR software, providing all the necessary, video and recording functions: like, Video compression, converting the video to a file, camera controls and display, record and playback functions.
Stand-alone versus PC-based DVR’s
In general, PC-based DVR’s have more advanced features than stand-alone models. Most of their strength relies on their processing power compared to standalone security DVR systems. PC Based DVR systems are also better suited for upgrades and systems expansions to support multiple hard drives and multi capture cards to support large amounts of cameras
In general when PC base and stand alone DVR came out to the market PC-based DVR’s had much more advanced features than stand-alone models and their processing power was stronger giving them the ability to process images faster and better. They also are better suited for upgrades and system expansions. But as time passed, Stand-alone DVR systems became more and more powerful and became very comparable to PC based DVR system in their performance and functionality. PC based systems still have more upgrade and expansion options, and for this reason most large institutions such as banks, malls, and airports utilize PC-based models rather than stand-alone DVR’s.
Dvrmaster.com is a website that provides DVR information and clarification on the different types of security Camera and Security DVR’s. It provides affordable and top-of-the-line DVR products as well as providing custom built systems for individuals as well as businesses.
If you are planning to install a security surveillance system in your home or business, you have two options to choose from, one DVR system with analog camera, second IP network camera. Deciding on IP versus analog cameras is not necessarily a simple decision because there are advantages and disadvantages to each technology. We will go over some of these differences in-depth so you can determine which option is right for you.
The main difference between the two technologies is the way in which the video signal is being delivered between the camera and the observer.
Analog video is a term that can refer to any analog television (picture only) transmissions signals. Only the visual element of video is transmitted, including the luminance (brightness) and chrominance (color) of the image.
An IP-based camera, also known as an IP network camera, digitizes the video signal using different kind of compression technology this specialized encoder that contains an onboard web server which allows the IP camera to act as a network device, this allow users to connect directly to the camera and view images through an existing network or web browser that can be accessed through the Internet.
Analog and IP-based video cameras can send signals either wireless or through wired connections such as Cat-5 cables. IP-based cameras have the benefit of being able to utilize existing switches and hubs, and routers that allow to be expanded to the world wide web.
Pros of analog cameras
- Lower cost — Analog cameras generally cost less to purchase than IP cameras.
- Greater flexibility of design — Analog cameras often come in a larger variety of designs such as mini covert cameras to large PTZ models. If you have unique surveillance needs you may find it easier to find the style of camera you need in an analog model.
- Superior compatibility — It is much easier to mix and match cameras and brands if you use analog versions. This can make it easier if you already have existing camera equipment that you wish to incorporate into your surveillance system.
Cons of analog cameras
- Lack certain features — Many of the basic analog cameras often lack some of the more advance features such as digital zoom.
- Potential interference problems — If you are installing a wireless surveillance system, analog systems can have interference problems. More importantly, the resulting signals cannot be encrypted. This can potentially mean that someone else can view the signal.
- Long distance applications are more difficult — If your surveillance needs encompass a wide area, analog cameras may not be your best choice. Analog cameras generally do not accommodate big distances, and getting them to work over broad ranges can be difficult.
Pros of IP cameras
- Better wireless reception — IP cameras have encryption built right into them providing for a more secure network. Interference is also not a problem with IP-based models.
- Can utilize existing wiring — Because IP-based cameras act as their own network device, you can often take advantage of existing network wiring within your home. This can make the installation task much easier.
- Remote access can be easier — IP cameras are better suited for remote surveillance needs.
Cons of IP cameras
- Higher cost — Because of the additional technology that is built into each camera, the cost is generally higher that analog versions.
- Higher bandwidth required — IP cameras require more bandwidth than analog cameras.
Given the pros and cost of each camera type, the decision really comes down to your specific surveillance needs. With an accurate assessment of your needs, the decision of which camera type to go with will become much