Magnum Semiconductor Inc. was a video compression technology company headquartered in Milpitas, California, and with an engineering branch at Waterloo, Ontario, Canada.

[2] Magnum acquired the consumer products division of LSI Corporation in June 2007, including Domino and Zevio video compression technology.

[3] The LSI division had started with the acquisition of C-Cube Microsystems, the first company to offer real time MPEG1 and MPEG2 compression.

Magnum offered hardware, software, reference platforms, and engineering support for digital video recording, playback and management of audio/video content.

The Magnum platforms also enabled sharing entertainment via optical disc, flash disk and home networking.