Note 19. Segment and Geographical Information (Detail) - Net Revenue by Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 02, 2013	Oct. 27, 2012	Jul. 28, 2012	Apr. 28, 2012	Jan. 28, 2012	Oct. 29, 2011	Jul. 30, 2011	Apr. 30, 2011	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Sales Revenue, Net	$ 44,199	$ 63,905	$ 68,251	$ 40,258	$ 35,566	$ 39,725	$ 46,694	$ 60,632	$ 216,613	$ 182,617	$ 286,915
Chipsets [Member]
Sales Revenue, Net									210,139	181,584	285,544
License and Other [Member]
Sales Revenue, Net									6,474	1,033	1,371
DTV [Member]
Sales Revenue, Net									66,564
Home Networking [Member]
Sales Revenue, Net									79,489	68,435	89,261
IPTV Media Processor [Member]
Sales Revenue, Net									31,079	62,441	137,281
Home Control and Energy Management [Member]
Sales Revenue, Net									12,426	10,922	5,524
Prosumer and Industrial Audio/Video [Member]
Sales Revenue, Net									10,344	12,079	15,035
Connected Media Player [Member]
Sales Revenue, Net									10,510	27,988	39,627
License and Other [Member]
Sales Revenue, Net									$ 6,201	$ 752	$ 187