O PROCEEDINGS APRIL 7, 8, 9, 10, 11, 1986 KEIO PLAZA INTER-CONTINENTAL HOTEL TOKYO, JAPAN Sponsored by THE IEEE ACOUSTICS, SPEECH, AND SIGNAL PROCESSING SOCIETY, THE INSTITUTE OF ELECTRONICS AND COMMUNICATION ENGINEERS OF JAPAN, and THE ACOUSTICAL SOCIETY OF JAPAN Volume 1 of 4 IEEE-IECEJ-ASJ INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING IEftI IIAflIUAIl O)O The 1986 International Conference on Acoustics, Speech, and Signal Processing (ICASSP), sponsored jointly by the IEEE Acoustics, Speech, and Signal Processing Society, the Institute of Electronics and Communication Engineers of Japan, and the Acoustical Society of Japan, is the eleventh in a series of international conferences devoted to ex- perimental and theoretical aspects of signal processing, speech, and acoustics. Conferences of this scope are possible only because of the continuing interest and support of the Society membership, expressed both by their submission of papers of high quality and by their attendance at the Conference. The ICASSP Conference Committee is grateful to all of the authors and session chairpersons for contributing to the success of the Conference. ICASSP 86 CONFERENCE COMMITTEE GENERAL CHAIRMAN PUBLICITY PUBLICATIONS Hiroya FUJISAKI Yasuo KATO Shizuo HIKI University of Tokyo NEC Corporation Tohoku University Department of Electronic C& Systems Research Laboratories Research Center for Applied Engineering Kawasaki, 213 Japan Information Sciences Bunkyo-ku, Tokyo, 113 Japan (044) 855-1 111 Sendai, 980 Japan (03) 812-2111 (0222) 27-6200 Gary E. KOPEC Schlumberger Palo Alto Research VICE CHAIRMEN Palo Alto, CA 94304, U.S.A. GENERAL AFFAIRS Ken'iti KIDO (415) 496-4606 Katsuhiko SHIRAI Tohoku University Waseda University Research Center for Applied Department of Electrical Engineering Information Sciences FINANCE Shinjuku-ku, Tokyo, 160 Japan Sendai, 980 Japan Akira KUREMATSU (03) 209-321 1 (0222) 27-6200 KDD R & 0 Laboratories Chiyoda-ku, Tokyo, 100 Japan Ryoichi MATSUDA (03) 211-4321 NTT Electrical Communications U.S. LIAISON Laboratories Charles F. TEACHER LOCAL ARRANGEMENTS RCAIGSD Staff Engineering Yokosuka, 238 Japan Mutsuo KONISHI (0468) 59-2000 Bldg. 206-1, Rt. 38 Cherry Hill Musashi Institute of Technology NJ 08358, U.S.A. Department of Electronic and (609) 338-5484 SUB-COMMITTEE CHAIRMEN Communication Engineering TECHNICAL PROGRAM Setagaya-ku, Tokyo, 158 Japan (03) 703-31 11 EUROPEAN LIAISON Shuzo SAITO Claude GUEGUEN Kogakuin University E.N.S.T. Department of Electronics REGISTRATION 46 Rue Barrault Engineering Jouji SUZUKI F 75013 Paris, France Shinjuku-ku, Tokyo, 160 Japan Radio Research Laboratory (1) 589-7061 (03) 342-1211 Koganei, Tokyo, 184 Japan (0423) 21-1211 Jae S. LIM Massachusetts Institute of Technology EXHIBITS Department of Electrical Engineering Kazuo NAKATA and Computer Science Tokyo University of Agriculture and Cambridge, MA 02139, U.S.A. Technology (617) 253-7314 Department of Applied Physics Koganei, 184 Japan (0423) 81 -4221 CHMRMAN'S MESSAGE Welcome to ICASSP 86 n Tokyo! Forthe first time in its history, the International Conference on Acoustics, Speech, and Signal Processing will come to the Far East in 1986. Sponsored jointly by the IEEE Acoustics, Speech, and Signal Processing Society, the In- stitute of Electronics and Communication Engineers of Japan, and the Acoustical Society of Japan, ICASSP 86 will be held on April 8 through 11, 1986 at the Keio Plaza Inter-Continental Hotel in Tokyo. I would like to invite you to visit Tokyo in its best season and participate in what is expected to be the largest and one of the most exciting ICASSPs. Our Call for Papers was met with enthusiasm and we received an enormous number of abstracts from all over the world. Our Technical Program Committee, with the kind assistance of the Technical Committees of the ASSP Society, has carefully compiled a technical program which is far larger than any of the previous ICASSPs. While keeping the fine tradition of previous ICASSPs, we have tried to broaden the scope of the conference by including papers dealing with new topics and novel approaches. Technical exhibits by Japanese and foreign firms will also be held to provide demonstration of the latest developments in hardware and software technologies. Technical visits to various Japanese firms and institutions are being arranged to provide the attendees with a chance of becoming acquainted with these high-tech activities. In addition to the four-day schedule of the main conference, several satellite events are scheduled. On April 7, we will have a series of tutorial lectures by distinguished speakers covering various topics in the field of Acoustics, Speech, and Signal Processing. Immediately following ICASSP 86, an International Symposium on Prospects and Problems of Interpreting Telephony will be held in Tokyo where a series of keynote lectures will be given to discuss various ap- proaches to one of the most important goals of the ASSP field: telephone conversation among people speaking dif- ferent languages. Various travel plans and post-conference tours of Japan and the Far East are being provided by our official travel agent, Japan Travel Bureau, and its affiliated agents in U.S., U.K. and Europe. These trips offer exciting and practical itineraries that will satisfy both your professional interests and your personal tastes. April in Tokyo begins with cherry blossoms. You will find the city and its people in a special, festive mood where almost everyone likes to go out to enjoy the cherry blossoms with family and friends. I believe that ICASSP 86 in Tokyo will be an unforgettable experience for those who will attend, and would like to extend to you, once again, the whole- hearted invitation from all the members of the Conference Committee, the Japanese Organizing Committee, and the Fund-Raising Committee. Hiroya FUJISAKI General Chairman TECHNCAL PROGRAM OVERVEW Reflecting both the explosive expansion of the acoustics, speech, and signal processing fields and the interesting venue for the conference — Tokyo, Japan — more than 1300 papers were submitted for ICASSP 86 from more than 40 countries all over the world. Members of the Technical Program Committee devoted their time to select as many valuable papers as possible. Consequently, this year's ICASSP has become much larger than ever before, with a technical program consisting of one plenary session and 56 regular sessions over the four days of the conference. Of the seven parallel sessions, five are oral, while the remainig two are poster sessions. The poster sessions will provide more informal setting for interaction between the authors and the participants. In the plenary session three overview lectures will be presented on theoretical aspects of spectral estimation, predictive coding of speech, and signal processing in radio astronomy. The regular sessions cover seven major areas: DIGITAL SIGNAL PROCESSING, SPECTRUM ESTIMATION AND MODELING, SPEECH, MULTI-DIMENSIONAL SIGNAL PROCESSING, VLSI, UNDERWATER ACOUSTICS, and AUDIO AND ELECTRO ACOUSTICS. There are a large number of high-quality papers incorporated in the technical program covering a wide variety of topics. Several of the regular sessions are new themes for ICASSP, such as, biomedical signal processing, optical signal processing, aids for the handicapped, and musical acoustics. We are confident that the ICASSP 86 will continue the best traditions of past ICASSPs and will also promote participant's professional activities. The high quality of the technical program is to a large extent due to the painstaking work done by the members of the Technical Program Committee. We hope that ICASSP 86 will be a truly exciting experience for you, both technically and personally. Our best wishes for an enjoyable stay in Tokyo. Shuzo SAITO and Jae S. LIM Technical Program Co-chairmen IEEE ACOUSTICS, SPEECH, AND SIGNAL PROCESSING SOCIETY The Acoustics, Speech, and Signal Processing Society is an organization, within the framework of the IEEE, of members with principal professional interest in the technology of transmission, recording, reproduction, processing, and measurement of speech and other signals by digital electronic, electrical, acoustic, mechanical, and optical means, the components and systems to accomplish these related aims, and the environmental, psychological, and physiological factors concerned therewith. ADMINISTRATIVE COMMITTEE Officers Thomas H.CRYSTAL, President Ronald E. CROCHIERE, Past President, '841'85 Institute of Defense Analyses AT&T Bell Laboratories Princeton, NJ 08540 Murray Hill, NJ 07974 Delores M. ETTER, Vice President Term Ending December 31, 1986 Electrical Engineering/Computer Engineering Delores M. ETTER Department S. Lawrence MARPLE, Jr. University of New Mexico Louis L. SCHARF Albuquerque, NM 92686 Term Ending December 31, 1987 Jae S. LIM, Secretary-Treasurer Benjamin FRIEDLANDER Jae S. LIM Massachusetts Institute of Technology James H. McCLELLAN Cambridge, MA 02139 Term Ending December 31, 1988 Maureen P. QUIRK Kenneth STEIGLITZ John W. WOODS Library of Congress No. 84-6451 39 Additional copies available from IEEE Service Center 445 Hoes Lane Piscataway, NJ 08854 IEEE Catalog No. 86CH2243-4 Copyright and Reprint Permissions: Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limits of US. copyright law for private use of patrons those articles in this volume that carry a code at the bottom of the first page, provided the per-copy fee indicated in the code is paid through