The book "Speech and Computer" documents the refereed contributions of the 17th International Conference on Speech and Computer, which took place in September 2015 in Athens, Greece. It includes 59 revised full texts selected from 104 original submissions. The topics covered span a wide range in the field of computer speech processing, including speech recognition, speech synthesis, and speech understanding. Additionally, related areas such as signal processing, speech and text processing, as well as multimodal speech processing and human-computer interaction are addressed. Thus, the conference provides a comprehensive overview of current research findings and developments in these dynamic fields.