Thesedays, the PC industry has been rendering to contribute computer technology into more and more other components of the house. When the benefits to having entree to a home electronic computer in every room of the home can be jolly conspicuous, consumers have mostly disapproved technology that would do such a matter. This can be best discovered in the duplicated pushes by the PC industry to create the house computer component of the house entertainment system. In the past times, these computers were essentially configured to utilize the lounge room television set, rather than a formal computer monitor, to show their desktops and artwork.

The home stereophonic system would also play as the computer’s speaker systems, and the keyboard and mouse would plug in to the electronic computer wirelessly. The universal thought was that the user of such a system would be capable to surf the Internet, compose electronic mail, and acquire work done all from the comfort of his or her favorite couch or lounge chair. Unluckily, the idea of creating the personal computer part of the home entertainment center has not really enchanted on among mainstream consumers in spite of the duplicated campaigns of the PC and other gadget industry. Two technologies that are getting through their maturity are likely to convert this position though. One is the increasing capacity of computer organizations to cover video and the other is the increasing electrical capacity of electronic networks to conduct the big numbers of data that establish for video. Wireless home networks are already popular in a lot of houses and fresh applied science is establishing it more and more workable to send video over wireless electronic networks.

Computer security system, in fundamental terms means keeping your PC and the information inside it safe and secure. Because for most people, computer is the place to keep our personal data.
Yet, most people don’t have enough understanding on how to make their computers safe and secure.  By following just a few simple rules below you can improve the general security of your computer.

The first step to keep in mind is what precisely the meaning of being attached to the cyberspace.  When your computer is connected to the internet, it defines that your home is open in many ways.  There are many directions to get inside your home. Through the windows, front door, back door, etc.  The more windows and doors you have got, the more path someone has into your home.  An open door doesn’t constantly mean you are going to be robbed, but it does improve the risks.

Your PC has several windows and doors, not all of them are locked. New flaws are being found everyday and the cure still haven’t been found until few days later.
Similar to your home, you wouldn’t let your front door unlocked. You shouldn’t leave your computer open wide either. The first two things we will talk about are installing a quality firewall and regularly updating your installed security software.

Recently, updating your application is getting easier, especially your Operating System.  In this article, we are not going to discuss in specific about the way to update the application that you have or use, but generally the software vendor will provide the guide to do this automatically through the internet. A good example of this case is the Microsoft Windows Update feature. Make sure to get the updates for your software.

There are two basic types of firewalls and both have the same services. First is hardware and second is software.

A hardware firewall is likely embedded in your router if you are using one.
Continuing the house analogy, a firewall is like making a wall and gate around your home and giving instruction to the security officer at the gate who can pass and who can not pass.

Having a firewall set up on your computer does not entirely protect your PC. Somebody with advanced knowledge on networking may find a whole to break your first level security system, which is firewall.
The most annoying thing is when we incidentally let somebody in our system  by opening an email or even by browsing the internet. Spyware, virus, trojan and suchlike are even more adept in their methods of fooling you and your security. Emails that you accept from a trusted friend may carry a critical virus without their notice. This point is where the next layer of protection should work, anti-virus software.

Anti-virus software comes with complete package nowadays. These software packages are frequently come as suites, that is including a firewall and spyware scanner. While most of these application are very competent in their promised tasks, it is not wise to be lulled into a false sense of security by them.  They are simply one level in what should be a multi level security program for your system.  One last important note about anti virus program is to be sure that it updates on a scheduled procedure.  New viruses come out day-to-day, so check its updates manually to be sure they have been updated.

Lets go back to the house analogy, we currently have locked all of our windows, doors and other entry ways. All the security system have also been fully updated.  We have a wall around our house with a guard at the gate and we have application that scans everything that enters through the gate. That seems pretty good, but there’s one last security hole we need to address, it’s you.

A large percentage of infections are stimulated by the computer user. The cyberspace is a dynamic  place that demands its users to be trained about its uses. You don’t need to be a computer expert to simply read your email. However, there is a simple  advise for you, spare some time to be learn on some of the threats that pop up daily, and how to prevent them.

Your computer is a powerful machine attached to one of the greatest things ever invented, the internet.  This vast resource can be a risky place if you are not properly prepared and informed.  Regular software updates, a great firewall, anti virus software and a little training are the basic principle in computer security.  Having and understanding these basics will have your computer safer, more secure and when your computer is secure you can browsing and doing activity on the internet.

There are several audio and video data file formats recognized by common audio video application.
This article is just a brief description of what the very commonly used audio and video file formats.

AAC
Advanced Audio Coding. This is the audio file format utilized by Apple for their iTunes Music Store, and it may appear with the M4A extension. The sound quality is much better than MP3. It was prepared as part of the MPEG4 group owned by Dolby (see below).

AU
This audio file format is the common utilized by Java, Sun and Unix.

MPEG
Moving Pictures Expert Group. Presently, there are numerous MPEG types. They are all described below.

MPEG-1
This data format is utilized in digital cameras and camcorders for small video recording. VHS quality playback can be expected from MPEG-1.

MPEG-2
Used for digital satellite Television, professional film recording and make personal DVD recordings. Provides provision for multi-channel surround sound recordings.

MPEG-3
MPEG-3 was offered as a different formats, but eventually combined into MPEG-2.

MPEG-4
This is the newest MPEG system and is utilized for streaming cyberspace content. It is also used in camcorder and for internet downloads. Required for DivX, it improves digital circulating, interactive graphics and multimedia.

MP3
Digital audio files, most commonly utilized to save and playback music. It compresses the files to nearly ten percent of a typical audio file, and a regular music track is around 5 – 6 MB. MP3 stands for MPEG-1 Audio Layer 3, not MPEG-3 as many people think of. A regular MP3 audio file is near to CD quality.

OGG
An audio file format support a variety of codecs, the well known audio codec is Vorbis. Yet, MP3 files are even more supported than Vorbis.

RA
Real Audio. This format is planned for streaming audio through the Internet. It is a self-contained file format with complete audio information kept within the file itself.

WAV
The most simple audio file formats, improved by Microsoft and IBM, and built together with Windows 95. It is an uncompressed audio file format, that is why this data format has large file size (10 x MP3), and does not need further processing to play. The WAV data format consists of three blocks of information. The RIFF block which identifies the file as a WAV file, The FORMAT block which describes parametric quantities such as sampling value and the DATA block which carries the actual information, or music sampling.

WMA
Windows Media Audio. A digital system manufactured by Microsoft, and is used in portable digital audio players. Using WMA, a file can be protected so that it cannot be replicated, and it can also be used to protect copyright.

WMF
Windows Media Format. These are audio-video files consisting of WMA and video codecs. They supply high quality and media protection for streaming, downloading and playing applications on computers.

WMV
Windows Media Video. Used in the Windows Media Player, this is used to stream, download and play audio and video content.

When handling audio and video file formats, sometimes you will notice the term ‘codec’. A codec is the acronym for encoder-decoder or compressor – decompressor. A primary function of a codec is to compress audio or video data flows so that the process of transmitting digital audio sample and video frames can be speeded up and reduce storage space.

The target of most codecs is to reduce the file size to the smallest while keeping audio and video quality.
A fast indication of the codec’s position in the track of transmission and reception is:
Video device (e.g. camcorder) – video capture card – video digitized – codec (compresses digital info) – result (MPEG2, AVI, WMV etc) – codec (decompress) – video frames – display device.

Between the two codecs, the compressed result is transported to the display device then transmitted, stored on file, etc. So, to condense the flow even further, we could essentially identify it as:
raw data – codec – transmit – codec – play

This description is simple, but it shows up where the codecs are used. Thus, in order to play a movie, video or music of a particular format, you need a codec in your PC to allow you decompressing the file and playing it.

Reformatting a PC is quite simple using Microsoft Windows XP. First of all is setting up your desktop computer to boot from the CD-ROM. This could be completed in the BIOS menu. Almost all mainboards is providing this menu by pressing delete button from the keyboard while the computer is booting. This will bring you into the BIOS menu. From the BIOS menu, you will have to select the booting sequence and choose the first boot device to the CD-ROM. Once this is done, you can put your Windows XP CD installer into the CD-ROM and reboot the computer. This would take you to the Windows XP installation menu. In the installation menu you can choose how you desire to continue with your installation.

A good piece of advice would be to backup everything before you proceed with the formatting.
Formatting a computer deletes everything on the hard drive, and so if you safe any music or documents that you consider is very important, back them up onto an external hard drive or a CD before you continue.

The first option is installing Windows again together with the existing operating system. This is not the option we want, so i advise you to ignore this selection. You need to select the format option. From Windows XP installation wizard you can select either quick format or regular format. With a 120 GB drive a quick formatting will take about ten minutes to complete, while a regular format needs up to one hour. Quick format would be the good option.

After you select format, all you need to do is wait. If the format process is accomplished you have to get through the steps of Windows installation. After all the process is done your computer will be fresh and as smooth as the day you bought it from the shops.