Multimedia communication Technology

As the name suggests, multimedia communication refers to a new type of communication, such as voice, image, graphics, data and text, which can simultaneously provide a variety of media information in a call process. It is the combination of communication technology and computer technology.

and telephone, telegram, facsimile, computer communication and other traditional single media communication methods, using multimedia communication, thousands of miles apart users can not only audio and video images to exchange information, distributed in different locations of multimedia information, but also in unison as a complete information presented to the user, And the user has the complete interactive control ability to the communication entire process. This is the distribution of multimedia communication, synchronization and interactive characteristics.

Multimedia communication has a wide range of applications. Its business type mainly has the following kinds:

Conversational Type: You can see his image in the telephone with a friend who is far away from home; You can trade negotiations with a partner in a foreign country to see the samples provided by the other person realistically, and to transmit the signed contract to each other immediately; You can even sit in your office or at home, Use your computer to "meet" with peers scattered around the world, and so on.

E-Letter: You can at any time to distant friends send (or receive) set audio-visual in one of the "e-mail".

Retrieval type: You can retrieve the multimedia information you need at any time from the multimedia database in different locations.

Distribution type: You can at home at random on the TV show you watch.

Many important technical problems need to be solved to realize the multimedia communication with such attractive application foreground. The first is the communication network problem. The most suitable communication network for multimedia communication is broadband painting integrated Service Digital network, which can flexibly transmit and exchange multimedia information with different transmission rates and different performance requirements. The "Information superhighway" being built by countries around the world has created conditions for "vehicles" to accommodate multiple media messages. Secondly, to solve the problem of "compressing" multimedia information, the frequency band of audio and video signals is compressed to a certain range, otherwise "information superhighway" will not tolerate so much multimedia information "vehicles", but also to develop at least can store, display processing more than two kinds of multimedia information of multimedia terminal equipment.

On the development of multimedia communications, there are also some different views abroad, such as in Japan, some people think that the development of multimedia communications will lead to the increase in the number of people in the Home Office, but the Japanese residential is not spacious, all day long at home with multimedia terminals office, family members will be satisfied? However, multimedia communication has become a hotspot in the field of communication, because it adapts to the demand of information communication in the information age. According to Intel's forecast, by 1997 each PC (personal computer) motherboard will be equipped with a full range of multimedia communications required hardware. The advent of the multimedia communication era is far off.