IEEE Thematic Meetings in Signal Processing (THEMES) is a recent joint initiative by the Conference Board and Publication Board of the IEEE Signal Processing Society. The inaugural THEMES event was held in March 2010 as a one-day event collocated with ICASSP 2010 in Dallas, Texas. The THEMES 2011 will be held on 22 May 2011 in Prague, Czech Republic, at the Prague Congress Centre.