Media 100 has entered the streaming-media services market by buying two companies, 21st Century Media and J2 Digital Media.

As a result of the acquisitions, Media 100 has launched a new division called StreamRiver Networks. This will provide encoding and hosting services for Internet broadcasters, Web designers and content creators.

The StreamRiver Networks services will use Media 100's streaming-media technology, such as Terran Interactive's Media Cleaner, which formats source material for distribution on the Internet in all major player formats from RealNetworks, Microsoft and Apple.

J2 Digital Media and 21st Century Media are encoding, hosting and streaming-media companies, based in New York and San Francisco respectively.

Media 100 announced last month that it has completed its merger with Digital Origin. It also bought Wired in December 1999.