In order to make safe and efficient automobile trarafic, ANSA (Auto Navigation System for Automobiles) is studied. ANSA is a computer system mainly showing the driver of an automobile a suitable route to destination on a CRT display. In this report, basic experiments and studies of software of ANSA are described. At first, check points of ANSA are shown and data structure of road networks is described. The data structure of road networks in this report is a pointer type and is composed of some levels containing highways, national roads, local roads, and so on . At last data of roads are inputted in a computer and its results are described.

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We have developed a system which instructs a route by a pedometer and an azimuth compass. At present, the system is composed of a recording unit having the locus in a vector sequence and a 16 bit personal computer (NEC PC9801 vm 2). We compared the recorded data with the real road map by the computer. Therefore, we obtained a well matched result between them, and inversely, we also made sure that the route is rectified by the road map. This paper describes the system configuration and some experimental results.

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In image coding using vector quantization, intravector correlation is successfully utilized for designing the codebook. As the number of dimension is made large, the performance of the vector quantization approaches to the rate-distortion bounds monotonically. However, from the practical viewpoint, the number of dimension cannot be made large enough to limit the intervector redundancy, and typically 16 or less, because the computational complexity grows as a exponential function of the number of dimension at the fixed coding rate. Therefore, much intervector redundancy cannot be removed by the vector quantization of small vector dimension, and should be utilized for achieving higher compression. From the above viewpoint, this paper proposes a new vector quantization scheme which utilizes intervector redundancy. In the proposed scheme, the codebook and its size are adaptively changed according to the local statistics extracted from a 32×32 pixel subblock by the clustering algorithm, and practically for every 32×32 pixel subblock the codewords of the codebook is selected from among the prepared set of codewords.

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Many Computer Animations are produced now. Computer generated Live Animations, however, are very few. We have proposed a trigonometric motion approximation method of computer animation making composed of animation primitives and produced a good animation of walking man on the 2-D plane. For making 3-D animation, we applied it to many kinds of 3-D motions that are not periodical.

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Considering the demands for the advance and integrated document transmission, CCITT (International Telegraph and Telephone Consultative Committee) has been standardizing the terminal characteristics and protocols for Telematic services such as Teletex, Facsimile, Mixed mode and Videotex, etc. The national standards of Japan, Which are based on CCITT international standards and also take domestic telecommunication condition into consideration, are notified by the Ministry of Posts and Telecommunications. This paper describes the recent trend of Standardization of Telematic terminals and their common protocols

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Messaging Handling Systems (MHS) for Interpersonal Messaging (IPM) and Message Transfer (MT) have been studied from the view point of communications protocol standardization in CCITT. In addition to MHS services, Message Processing (MP) services such as image processing, filing and retrieving services, and Database access (DB) services using multimedia will come into increasing demand in office automation field. This paper describes the consideration on the system design concept and protocols for the intelligent messaging system which can provide MHS, MP, DB services.

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Ricoh has developed the local area network system, named "RINNET". It has capability to process all kinds of the office documents including the text-graphic document and to manage the office information integratedly. At the document transfer between stations on the LAN, RINNET USE Mixed-mode method, named "LINEARLIZE". LINEARLIAE can transfer the documents that consist of three kinds of data. As follows ; 1. Text ; Based on JIS-C6225 and JIS-C6226. 2. Graphic ; Ricoh format for RINNET-G. 3. Image ; Compressed data in the MH method. Concerning with the performance, we have implemented the high speed LAN by the study of various methods.

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This report describes the Computer and Facsimele System structure and the construction of facsimile media converter, which converts mixed mode documents into analog facsimile signals. Function of the media converter is extended to geometric graphics, which will be the key to development of information providing services. The converter assures efficient storage and transportation of documents for Computer and Facsimile system, and various services which use facsimiles are provided by the system.

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An editing system, with which we can construct mixed mode documents for mixed mode communication, is described. Our system is composed of the content editor and the structure editor. The structure editor is able to manipulate the layout structure of mixed mode documents. We can easily edit layout objects using the structure window where the tree structure of the document is displayed. Moreover, this system has the function to construct structured documents automatically from the scanned image composed of characters, tables and figures. A new algorithm based on topology analysis on binary image is proposed to separate character regions and photographic regions. And also media conversion from pattern to code is introduced with the interactive aid of operator's knowledge.

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This paper describes an experimental study of visual response time and descrimination ability for high speed browsing. It has been found that descrimation ratio is reduced in proportion to the display time of indivisual page. The response time for key operation has been estimated as about 500 ms.

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