Application of Distributed Processing Technology in Video Conferencing Systems

1. Application of Distributed Processing Technology

Video conferencing enables real-time synchronous and interactive communication between point-to-point, point-to-point, and multiple points. Synchronization and coordination between sending and receiving of different media and terminals in different locations is required, and the multi-point control unit (MCU) is effectively controlled to share the data of the participating terminals and effectively coordinate the synchronous transmission of various media, make the system more user-friendly information exchange and processing methods.

Communication, cooperation, and coordination are the requirements of distributed processing, and are also the basic meaning of the interactive multimedia collaborative work system (cscms. Therefore, in this sense, the video conferencing system is one of the main groupware systems of cloud computing.

2. Mainstream Media Processors

With the wide application of multimedia technology, the use of DSP chips to design multimedia devices has become a focus of attention. However, the demand for programmable media processors is also high.

Because multimedia signal processing technology is in a rapid development stage, various international standards coexist, and new standards are emerging. For example, video compression encoding only involves multiple international standards: H.261, H.263, MPEG1, MPEG2, MPEG4, and new H.264. A single network may transmit a variety of different standard code streams, and a device must constantly update the video encoding technology.

Although media processors have not been used for a long time, they have gained widespread attention. It is foreseeable that media processors will be quickly applied to the multimedia equipment manufacturing industry. Only two typical chips are listed here.

The first is that TI's new digital media processor, tms320dm2-based, has three video ports that can be input or output. It supports BT656, Ethernet ports of Mbit/s, multi-channel audio serial ports, and 66MHzPCI, supports Four D1 images, 30 frames/second MPEG-2 real-time compression;

The second is the BSP series high-speed broadband digital signal processor (produced by Equator ).

Among them, BSP-15 is a high-efficiency DSP specially designed for video applications, with a highly integrated single chip to meet the needs of broadband products. At a clock frequency of 40 billion MHz, the BSP-15 processing capacity is 40 GOPS (8.5 integer operations per second), the processing speed is equivalent to 1.33 times of Pentium III, times of the same series of MAP-CA chips, it is more than 10 times that of other solutions.

The core function of BSP-15 is to use software designed for high performance, large video stream broadband applications, combined with the iMMediaTools software development environment and the provision of audio and video library, it can provide efficient solutions for digital video and image applications.