Yoshiyuki Mochizuki

An elementary processor architecture with simultaneous instruction issuing from multiple threads

In this paper, we propose a multithreaded processor architecture which improves machine throughput. In our processor architecture, instructions from different threads (not a single thread) are issued simultaneously to multiple functional units, and these instructions can begin execution unless there are functional unit conflicts. This parallel execution scheme greatly improves the utilization of the functional unit. Simulation results show that by executing two and four threads in parallel on a nine-functional-unit processor, a 2.02 and a 3.72 times speed-up, respectively, can be achieved over a conventional RISC processor. Our architecture is also applicable to the efficient execution of a single loop. In order to control functional unit conflicts between loop iterations, we have developed a new static code scheduling technique. Another loop execution scheme, by using the multiple control flow mechanism of our architecture, makes it possible to parallelize loops which are difficult to parallelize in vector or VLIW machines.

A compression/decompression method for streaming based humanoid animation

In VRML, a modeling language for describing 3D objects on the internet, the specification to realize lifelike movement of a 3D character with a skeletal structure (such as a human) has been standardized as VRML Humanoid Animation Ver.1.0 (H-Anim Ver.1.0) in the H-Anim WG of the VRML Consortium. To extend this specification, we suggest a method that makes it possible to send/receive motion data in real time on a network with narrow bandwidth such as a telephone line. Moreover, by sending the motion data with streaming data from server to client, the time required before playback can be greatly reduced. This technology uses basic techniques that can be applied widely to webbased 3D applications, broadcasting contents etc.

WonderSpace: web based humanoid animation

Abstract In VRML, a modeling language for 3D objects on the Internet, the specification to realize life-like movement of a 3D character with a skeletal structure (such as a human) has been standardized as the VRML Humanoid Animation (H-Anim) Specification Ver.1.0 in the H-Anim WG of the VRML Consortium. To extend this specification, we suggest a method named “WonderSpace”, it is possible to send/receive motion data in real time on a network with a narrow band width such as a telephone line. Moreover, by sending motion data with streaming data from server to client, the time required before playback can be greatly reduced.

WonderSpace: interactive 3D animation browser

V IS U A L P R O C E E D IN G S E L E C T R IC G A R D E N WonderSpace is a browser for visualizing a virtual world in cyberspace, where lifelike creatures act according to VRML 2.0 and a specification for skeleton animation. Through human-like avatars, WonderSpace realizes voice or sound communication in multi-user cyberspace. Technical features include compression/decompression of shape data and motion data, modified motions generated from a base motion, motion connecting, and synchronizing motion with sound. At SIGGRAPH 97, WonderSpace technology provides three interactive experiences: