In multimedia technology, the most critical technology is () A presentation technology B transmission technology C storage technology D compression technology.

In multimedia technology, the most critical technology is compression technology.

The key technologies of multimedia mainly include data compression and decompression, media synchronization, multimedia network, hypermedia and so on. Among them, video and audio data compression and decompression technology is the most important.

Video and audio signals have a large amount of data and require high transmission speed. At present, microcomputers can't fully meet the requirements. Therefore, multimedia data must be compressed and decompressed in real time.

The significance of expanding the application of data multimedia technology lies in:

1 enables computers to handle the most direct and universal information in human life, thus greatly expanding the application fields and functions of computers.

2. Make the human-computer interaction interface and means of the computer system more friendly and convenient, and non-professionals can also use and operate the computer conveniently.

3. Multimedia technology closely combines audio-visual technology, computer technology and communication technology, laying a new cornerstone for the development of information processing technology. The development of multimedia technology has a history of many years. The basic technology of sound, video and image compression has gradually matured, and the products have entered the market. Popular technologies such as pattern recognition, MPEG compression technology and virtual reality technology have gradually matured, and I believe they will enter the market soon.