144 Copyright © 2010, IGI Global, distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 8 Voice Driven Emotion Recognizer Mobile Phone: Proposal and Evaluations Aishah Abdul Razak Multimedia University, Malaysia Mohamad Izani Zainal Abidin Multimedia University, Malaysia Ryoichi Komiya Multimedia University, Malaysia ABSTRACT This article proposes an application of emotion recognizer system in telecommunications entitled voice driven emotion recognizer mobile phone (VDERM). The design implements a voice-to-image conver- sion scheme through a voice-to-image converter that extracts emotion features in the voice, recognizes them, and selects the corresponding facial expression images from image bank. Since it only requires audio transmission, it can support video communication at a much lower bit rate than the conventional videophone. The first prototype of VDERM system has been implemented into a personal computer. The coder, voice-to-image converter, image database, and system interface are preinstalled in the personal computer. In this article, we present and discuss some evaluations that have been conducted in sup- porting this proposed prototype. The results have shown that both voice and image are important for people to correctly recognize emotion in telecommunications and the proposed solution can provide an alternative to videophone systems. The future works list some modifications that can be done to the proposed prototype in order to make it more practical for mobile applications. INTRODUCTION AND MOTIVATION Nonverbal communication plays a very important role in human communications (Komiya, Mohd Arif, Ramliy, Gowri, & Mokhtar, 1999). However, in telephone systems, only audio information can be exchanged. Thus, using telephony, the transmission of nonverbal information such as