What is MP3 files, AAC, WMA, WAV, and PCM

There are various kinds of audio file types, the most famous of which is MP3 and WAV to to that we rarely encounter such as AAC and PCM. -Format audio file formats are often we meet in a variety of portable music players, such as MP3 Player or iPod.

Reviews below will give some idea about the file formats is a simple audio, but certainly easy to understand. So you can find out briefly what it supports MP3, AAC, WMA, WAV, and PCM?


01 MP3 or MPEG-1 Layer 3. MPEG itself is an abbreviation of Moving Pictures Experts Group, which is an organization that develops standards for the code of audio and video programs. An MP3 file has the bit rates ranging from a low of 32kbits/detik to 320kbits/detik. MP3 file format is the most popular among the public, because the small file size but with the sound quality is still maintained. Also a lot of file formats supported MP3 player, music player that many on the market, so no wonder that MP3 is better known.

02 WMA or Windows Media Audio is an audio compression format developed by Microsoft as a competitor of the MP3 file format

03 AAC stands for Advanced Audio Coding is an audio compression format used in Apple iPod, iPhone and iTunes. But now the latest mobile phone also has a lot to support this AAC file format

04PCM = Pulse Code Modulation, also known as Linear PCM is a standard for audio CD format. Because it is not compressed, then the PCM format has a file size large enough when compared with the MP3 format

05 WAV or waveform. WAV audio files similar to the PCM, but can be compressed or not compressed. Wav files are also similar to AIFF files are audio files that use Mac computers. WAV format is widely used by mobile phones, which could match the popularity of MP3 files Read More...

Wireless Wide Area Networks (WWANs)

WMAN technology allows users to make wireless connections between multiple locations within a metropolitan area (for example, between building different in a city or on the university campus), and this can be achieved without the cost of fiber optic or copper cables that are sometimes very expensive. In addition, WMAN can act as a backup for cable-based network and he will be active when the cable-based network that was experiencing problems. WMAN using radio waves or infrared light to transmit data. Broadband wireless access networks, which provides users with high-speed access, is much in demand today. Although there are several different technologies, such as multichannel multipoint distribution service (MMDS) and local multipoint distribution services (LMDS) in use today, but the working group for IEEE 802.16 broadband wireless access standards continue to make the specifications for these technologies

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Wireless Local Area Networks (WLANs)

WLAN technology allows users to build a wireless network in an area of local nature (for example, in the office building environment, building on the campus or public area, such as airport or cafe). WLAN can be used in temporary offices or in which the permanent cable installation is not allowed. Or WLAN sometimes built as a supplement to an existing LAN, so users can work on a variety of different locations within the building. WLAN can be operated in two ways. In the WLAN infrastructure, wireless stations (devices with radio network cards or external modems) connected to a wireless access point that serves as a bridge between the stations and the existing backbone network at the time. In a WLAN environment in nature peer-to-peer (ad hoc), some users in limited areas, such as meeting rooms, can form a temporary network without using access points, if they do not require access to resources jaringan.Pada in 1997, to approve the IEEE 802.11 standard for WLANs, which specifies a data transfer rate of 1 to 2 megabits per second (Mbps). Under the 802.11b, which became the dominant new standard at the moment, data is transferred at a maximum speed of 11 Mbps with a frequency of 2.4 gigahertz (GHz). Newer standards others are 802.11a, which specifies data transfers at a maximum speed of 54 Mbps through the 5 GHz frequency


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Wireless Personal Area Networks (WPANs)

WPAN technologies allow users to build a wireless network (ad hoc) for simple devices such as PDAs, cell phones or laptops. This can be used in the personal operating space (personal operating space or POS). A POS is a space around the person, and can reach a distance of about 10 meters. Currently, two of the key WPAN technologies are Bluetooth and infrared light. Bluetooth is a cable replacement technology that uses radio waves to transmit data up to a distance of about 30 feet. Bluetooth data can be transmitted through the wall, pocket or purse. Bluetooth technology is driven by a body called the Bluetooth Special Interest Group (SIG), which publishes the Bluetooth specification version 1.0 in 1999. Another alternative way to connect devices within very close distance (1 meter or less), then the user can use infrared light merah.Untuk standardize the development of WPAN technology, the IEEE has been built for the 802.15 working group WPAN. This working group made WPAN standard, based on the Bluetooth specification version 1.0. The main purpose of this standardization is to reduce complexity, lower power

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Wireless Personal Area Networks (WPANs)

WPAN technologies allow users to build a wireless network (ad hoc) for simple devices such as PDAs, cell phones or laptops. This can be used in the personal operating space (personal operating space or POS). A POS is a space around the person, and can reach a distance of about 10 meters. Currently, two of the key WPAN technologies are Bluetooth and infrared light. Bluetooth is a cable replacement technology that uses radio waves to transmit data up to a distance of about 30 feet. Bluetooth data can be transmitted through the wall, pocket or purse. Bluetooth technology is driven by a body called the Bluetooth Special Interest Group (SIG), which publishes the Bluetooth specification version 1.0 in 1999. Another alternative way to connect devices within very close distance (1 meter or less), then the user can use infrared light merah.Untuk standardize the development of WPAN technology, the IEEE has been built for the 802.15 working group WPAN. This working group made WPAN standard, based on the Bluetooth specification version 1.0. The main purpose of this standardization is to reduce complexity, lower power

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What is software

Software is a program code arranged in a systematic way to achieve a goal. On each computer system must have the software because without the software interaction with hardware brainware not possible. In terms of software functions can be grouped into:
1. Operating system (operating system)
The operating system is software used to manage resources - resources (resources) computer. Pengaksesannya in terms of operating system software can be divided into two parts namely:
- Server operating systems
- Client operating system
2. Programming language (programming language)
Software used to design software on a computer system. In terms of similarities to human language, software programming language can dikelompokkkan into:
- Low-level programming language, eg: machine language
- High level programming language, eg assembly language
- High level programming language, eg Pascal, C, prologue, fortran, COBOL
- Language is very high level programming, ie Visual Basic, Delphi, FoxPro, Visual C
From the data structures, programming languages can also be grouped into:
- Structured programming language, eg: pascal, C, COBOL
- Object-based programming language, eg Visual Basic, Visual C #, visual c, visual web developer
- Unstructured programming languages, eg: Structured Query Language
3. Application (application)
Software that was formed to perform certain functions such as word processing, number, presentation, animation, multimedia and so on. Based on the application functions can be grouped into:
- Word processing applications (word processing application), eg: Microsfot Word
- The application of data processing (processing database application), eg: Microsfot Access
- Application processor numbers (numerical processing application), eg: Excel Microsfot
- Image processing applications (image processing application), eg: Photoshop
- Application processing animation (animation processing application), eg: Flash
- Voice processing applications (audio processing application), eg: Jet Audio
- Multimedia processing applications (multimedia processing application), eg: 3D Max
- Processing applications presentation (presentation processing application), eg: Microsfot Power Point
- Application processing statistics (statistical processing application), eg: SPSS
- Processing applications of mathematics (Mathematic processing application), eg: Matlab
- Etc.
4. Utilities (Utility)
Software used to harness the computer functions and very specific functions such as registers, Defragmenter, norton utilities and so on.

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informatics

Informatics (UK: Informatics) is a discipline that studied the transformation of the facts bearing on the data and information-based computing machines. These disciplines include several kinds of fields, including: computer science, information science, information systems, computer engineering and applications information in management information systems. In general, informatics study the structure, properties, and interaction of several systems used to collect data, process and store the results of data processing, and display it in the form of information. Aspects of broader information than the computer-based information systems, but still a lot of information that is not and has not been processed by computer.

Informatics has the basic concepts, theories, and the development of applications. Informatics can support and is associated with cognitive and social aspects, including the influence and the social effect of information technology in general. The use of information in some kinds of areas, such as bioinformatics, medical informatics, and information that support the science library, a few other examples from the field of informatics.

In the scope of a broader, informatics includes several aspects:

1 studying information theory mathematical concept of an information
2 science information to learn about how the collection, classification, storage manipulation, access, and dissemination of information for social and civic purposes as a whole
3 computer science and computer engineering learn about the processing, archiving, and dissemination of information by using information technology and other tools based computer. Read More...