Abstract
Cars have used speech recognition and guidance for navigation systems from the early 2000s, however, the complicated mixture of multi-mode controls, such as a switch, touch panel, and speech, continues to be problematic. In this paper, we first discuss the problems with the conventional design of speech interface as equipped on a vehicle. Furthermore, to make clear the effect of equipping a spoken dialogue system, we experimentally compare the speech interface that includes natural language understanding (NLU) and spoken dialogue management (SDM) technology with the conventional speech command interface type of input. According to our evaluation, the total task time and the response time against LED stimuli showed significant differences between the two speech interface types. The NLU/SDM system showed a quicker response time for each task than did the command input system.
