ICASSP is the number one international conference for signal processing bringing together over 2000 participants and experts from industry and universities.
The conference features world-class speakers, tutorials, exhibits, demos, and over 120 lecture and poster sessions on the following topics: Signal Processing Theory and Methods, Machine Learning for Signal Processing, Sensor Array and Multichannel Systems, Audio and Acoustic Signal Processing, Speech and Language Processing, Signal Processing for Communications and Networking, Image, Video, and Multidimensional Signal Processing, Biomedical Imaging, Information Forensics and Security, and Signal Processing Education.
The IEEE is an organization of over 350000 Electrical and Computer Science engineers in ~150 countries worldwide publishing more than 25% of the scientific and technical literature in electrical engineering and computer science.
More information can be found at http://www.icassp2011.com/