Challenging the mobile multimedia frontier over IMT-2000 network

摘要

NTT DoCoMo is the company to "DO Communications over the Mobile Network", and has 36 million subscribers in April 2001. This presentation covers DoCoMo's multimedia services over IMT-2000. DoCoMo's IMT-2000 network (i.e., one of Japan's third generation mobile networks) allows us to have transmission speeds of 384 kbps. With the benefit of this broader bandwidth, mobile multimedia services are expected to run on top of the network. Mobile visual phones and media streaming on demand are typical applications, as well as enhanced "i-mode" services that provide us with the ability to access Internet contents written in compact HTML, and to exchange e-mails faster than ever. For such applications, we have newly developed coding technologies such as MPEG-4, and related system technologies. After introducing the applications for wireless video with its coding technologies, future challenges and directions beyond the IMT-2000 network are discussed.