MPEG (derived from the encoding of the following abbreviation Moving Picture Experts Group) is a digital encoding of audio and video files in a format standard of lossy data compression (Pereira and Ebrahimi 589). In this respect MPEG has different versions due to the gradual flow of technological progress and achievements of this group of researchers who year by year tried to implement new approaches to the digital format. In other words the researchers provided updating of previous versions with additional advantages. According to Steven Shepard (2005) there such types of MPEG standards as: MPEG-1; MPEG-2; MPEG-3; MPEG-4; MPEG-7. The first version of MPEG layer is was invented to resolve problems with data compression due to the challenges of time. It was contrasting to CD-ROM and PC in storage capabilities. MPEG-2 is a version which incorporated the ability to transmit and compress files with the speed of 6 to 40 megabit per second range; this format is appropriate even for HDTV and DBS and is used to promote streamline video for different purposes (Shepard 82). MPEG -3 is a special format for audio files which allows on the rate of 128 Kbps to store music files with a less degradation of sound quality, but this approach varies in the extent of rate, of course(Shepard 82-83). MPEG-4 is a format designed for the purpose to play and promote low bit rate transmissions, and this version is reliable and usable in three fields of its direct implementation: “digital television, interactive graphics applications, and interactive multimedia such as the distribution of HTML-encoded Web pages” (Shepard 83).
Multicasting is a service which is considered with data sending from one user to different ones who are interested in such packet data (Harold 451). One should not mix multicasting up with broadcasting, because it is in a away like a service club, where people share data from an appreciated user with further probable discussion of it in their short or relatively broad circles. It is concerned with IP telecommunications and relies on it, particularly, via Internet in contemporary world of high technologies. Multicasting is used in Australia. In fact, it is one of the innovations to be appropriate for Australia due to the huge size of its territory. Moreover, Australians have friends and relatives all over the country and neighboring territories, Tasmania Island and New Zealand as well. The only thing concerns the presence of Internet, so that to encompass the territory and provide connection with users. IT is shown on the example of inhabitants of the east and west sides of the continent, namely Sydney, Melbourne etc and, for example Perth.
Encoding is a process which makes huge audio or video files converted into proper for Web distribution size (Ratcliffe and Mack 231). In this respect it is very necessary to use encoding for making time frameworks for opening and sending files shorter without huge losses in quality. Raw video or audio files are too large too deliver across Internet and people save money and time when providing encoding for data, so that to make this process more facilitated. The only limitations according to the process of encoding are concerned with the concepts of bandwidth and throughput (Ratcliffe and Mack 231). These two parameters are significant, in order to evaluate the possible speed of traffic and other dimensions considered with fast and appropriate delivery.
Works cited
Harold, Elliotte Rusty. Java network programming. Ed. 2. Sebastopol, California: O’Reilly, 2000.
Pereira, Fernando C. N., and Ebrahimi, Touradj. The MPEG-4 book. New Jersey: Prentice Hall PTR, 2002.
Ratcliffe, Mitch, and Mack, Steve. Podcasting Bible. Hoboken, New Jersey: John Wiley and Sons, 2007.
Shepard, Steven. Telecom Crash Course. Ed. 2. New York: McGraw-Hill Professional, 2005.