[Retracted] Multimedia Teaching of College Musical Education Based on Deep Learning

Table 2

Three generations of information technology and three generations of distance education.

Staging	First generation	Second generation	Third generation
Age	From the mid-19th century to the mid-20th century	From the mid-20th century to the end of the 1980s	From the 1990s to the present
Distance education classification	Correspondence education	Distance education in multimedia teaching	Open and flexible distance learning
Information technology	Traditional printing technology.; Postal transmission technology.; Early audiovisual technology.	One-way transmission-based electronics.; Information and communication technology.	Two-way interactive electronic information.; Communication technology.
Main media	Printing materials, photography, electricity words, slides, vocals, projections, recording, film, early recording	Mass media (broadcasting, Satellite TV), personal media (audio recording, CD-ROM, microcomputer), early remote electronic communication, computer-aided teaching	Modern remote electronic communication, no line mobile communication, computer multimedia, computer network, knowledge (smart) media, virtual technology