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VIRTUAL EXTRAS: CONVERSATIONAL BEHAVIOR SIMULATION FOR
BACKGROUND VIRTUAL HUMANS
by
Dusan Jan
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(COMPUTER SCIENCE)
December 2012
Copyright 2012 Dusan Jan
Object Description
| Title | Virtual extras: conversational behavior simulation for background virtual humans |
| Author | Jan, Dusan |
| Author email | dusan_jan@hotmail.com;djan@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Computer Science |
| School | Viterbi School of Engineering |
| Date defended/completed | 2012-08-06 |
| Date submitted | 2012-08-22 |
| Date approved | 2012-08-23 |
| Restricted until | 2012-08-23 |
| Date published | 2012-08-23 |
| Advisor (committee chair) | Traum, David |
| Advisor (committee member) |
Gratch, Jonathan Koenig, Sven Moore, G. Alexander |
| Abstract | When we simulate a large number of virtual humans in virtual worlds we encounter a point where it is no longer feasible to simulate all of them in full detail. In the case where some of them never interact with the user it is useful to distinguish between main virtual humans and background virtual humans. The main purpose of background virtual humans is to engage the user in the immersive environment. Their main objective is to be believable to the user and allow him to suspend disbelief. To achieve this, the background virtual humans must be able to perform various behaviors, with conversational behavior being one of the most commonly required. ❧ In this dissertation we present a framework for believable simulation of conversational behavior for background virtual humans based only on a small number of parameters. It was developed over the course of four major iterations based on computational models derived from literature review and analysis of video corpus data. It takes into account the role of proxemics, gaze, turn-taking and pause on believability of conversational behavior and how context such as culture and conversational task affects believability. ❧ We report on a number of evaluations performed during the development of the simulation and show that simulations appear believable to the subjects. We describe the applications where the simulation has been employed and show what role it can play in a larger framework covering multiple levels of detail. |
| Keyword | virtual humans; conversational behavior; behavior simulation; believability; virtual worlds; levels of detail; cultural differences |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Rights | Jan, Dusan |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Archival file | uscthesesreloadpub_Volume4/etd-JanDusan-1163.pdf |
Description
| Title | Page 1 |
| Full text | VIRTUAL EXTRAS: CONVERSATIONAL BEHAVIOR SIMULATION FOR BACKGROUND VIRTUAL HUMANS by Dusan Jan A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (COMPUTER SCIENCE) December 2012 Copyright 2012 Dusan Jan |
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