This course introduces fundamental knowledge about speech analysis, speech coding, speech recognition, speech synthesis, speech signal processing, spoken dialogue systems, etc. It gathers a wide variety of key ideas on the techniques involved in these topics, a domain where Japan has been a leading country. Many applications such as speech and music information compression techniques in mobile phones, MD or MP3 are already well established, and speech recognition techniques or speech synthesis systems, although they have not yet reached human’s ability, already are very advanced information processing technologies. These topics involve algorithms and basic ideas of spectral analysis, pattern recognition, stochastic modeling, statistical training, optimization, etc. This course aims at acquiring the fundamental concepts and knowledge of these techniques.