UDK 004.4

CLASSIFICATION AND ANALYSIS OF MULTIMEDIA CONTENT PRESENTATION FORMATS

Qodirov Farrux Ergash o’g’li

Teacher of the department "Information technology"

Karshi branch of Tashkent University of Information Technologies named after Mohammed al-Khwarizmi Uzbekistan, Karshi

Mirzayeva Faxriya Shavkat qizi   

Karshi branch of the Tashkent University of Information Technologies named after Muhammad Al-Khorazmiy 2nd year student

Shokirov Shoxrux Husen o’g’li

Karshi branch of the Tashkent University of Information Technologies named after Muhammad Al-Khorazmiy 2nd year student

Annotation: As noted, there are many sources of multimedia content. In this variety of sources, almost every type is associated with one or more different data presentation formats. A special diversity is observed in the analog world - differences both in the methods of transmission and reception of the radio signal, and in the structure of the image itself. Greater uniformity has been achieved through digital standardization.

Key words: Multimedia, radio signal, format media, standart formats.

The classification of the presentation formats for the transmission of multimedia (television) content is shown in Pic.1. Analog television broadcasting standards began to emerge since the advent of television itself. Historically, the first television broadcasting standard adopted in 1953 in the United States was NTSC. However, in some European countries, another standard, PAL, was developed later in Germany in 1961, which took into account some of the disadvantages of NTSC. However, for economic and financial reasons in France, and later in the USSR, another standard was adopted - SECAM. With the development of information technology, attempts were made to create a digital television standard. The merit of the very idea of ​​digital television is the picture and sound quality, which can be set by the content provider itself. Also important is the possibility of a significant increase in the number of channels using the same frequency band as in the analogue broadcasting method. As in the case of analog standards, based on geopolitical and economic prerequisites, a number of digital television standards were born - ATSC in the USA, ISDB in Japan and DVB in Europe. All these standards are based on MPEG2 - a format for presenting multimedia data. Let's take a look at some of the digital formats.

Pic. 1. Classification of multimedia data presentation formats.

DVB (Digital Video Broadcasting Project, DVB-C, DVB-DSNG, DVB-H, DVB-MC, DVBMS, DVB-MT, DVB-P, DVB-S, DVB-S2, DVB-SFN, DVB-SMATV, DVB -T, DVB-MHP, DVBM) is an organization that develops technologies for digital television [33]. In Europe, the following transmission protocols developed by DVB are most widely used: DVB-C (for cable networks EN 300 429), DVB-S (for satellite broadcasting EN 300 421, TR 101 198), DVB-T (for terrestrial broadcasting EN 300 744, TR 101 190). DVB develops not only transmission protocols, but also standards for interactive applications such as set-top boxes, etc. Other DVB protocols include MHP (multimedia home platform, abbreviated as DVB-MHP: TS 101 812, TS 102 812, TS 102 819), DVB-M (DVB-S / T / C signal measurement standard; TR 101 290, TR 101 291 ), DVB-H ("update" of the DVB-T standard, which allows the digital stream to be delivered to mobile devices over terrestrial terrestrial networks, EN 302 304). ATSC and ISDB. ATSC (The Advanced Television Systems Committee, ATSC Standard A / 53C with Amendment No. 1 and Corrigendum No. 1) is an organization that develops and approves standards for advanced television systems, including HDTV. The most widely used ATSC standards are in the USA and Canada. ISDB (Integrated Services Digital Broadcasting, ISDB-T) is a digital television standard developed in Japan. It integrates various types of digital content. It can be HDTV, STDV, sound, graphics, text, etc.

Analysis of contradictions in the implementation of broadcasting multimedia content. In the implementation of broadcasting multimedia content, a number of contradictions can be distinguished related to the quality of the image used in multimedia broadcasting and the number of users using multimedia broadcasting services (simultaneously connected users to the broadcast server. From the analysis of the contradictions, one can single out the main inconsistencies between various kinds of desires and goals: 1 Desire to reduce the bandwidth of a TV / radio channel; desire to increase the quality of the picture / sound. 2 To increase the number of simultaneously connected subscribers; do not increase the network bandwidth (do not change the network structure). 3 To increase the number of various multimedia content available for viewing; do not increase the network bandwidth (do not change the network structure); not to expand the hardware part of the broadcasting complex.

REFERENCES

1.                Ефимов С.Н. Цифровая обработка видеоинформации. – М.: Science.

2.                Сэломон Д. Сжатие данных, изображений и звука. ­– М.: Техносфера, 2006. – 368 с.

3.                Jesse Russell. MPEG transport stream. – 2012. – 105 с.

4.                Wu D., Hou Y.T., Zhu W., et al. On end-to-end architecture for transporting MPEG-4 video over the Internet/ IEEE Trans. Circ. Syst. Video Technol. ­– 2000. – с. 923-941