Hiroyasu Ohtsubo

Development of low power MPEG1/JPEG encode/decode IC

We have developed a low power MPEG1 (Moving Picture Expert Group)/JPEG (Joint Photographic Expert Group) encode/decode single chip IC (codec). Using compact ME (motion estimation) process and a power management function we realize a low power consumption. Total power consumption of the codec is 500 mW. Using this chip, we have also developed a compact digital camera for the MPEG1 stream.

A Digital Video Camera With An Arbitrary Aspect Ratio

A novel video camera with an arbitrary aspect ratio was developed using newly developed digital signal processing VLSIs. Programmable VLSI circuits are adaptively controlled by a microcomputer. With the arbitrary aspect ratio of this digital camera, the proposed wide-screen CCD (charge-coupled device) imager could compete with conventional 3:4 imagers. >

A 0.8 mu m CMOS digital signal processor for a video camera

A digital signal processor has been developed for a video camera by using a 0.8- mu m CMOS process. This LSI includes almost all the functions of a video camera. It also integrates a circuit for extending the dynamic range and a three-line color processing circuit to realize true-to-life color reproduction. Using this LSI, a compact and lightweight video camera with high picture quality has been realized. >

1 chip low power MPEG1 codec with compact motion estimation

We have developed a low power MPEG1/JPEG encode/decode single chip LSI (codec). On the development of the codec, we have developed a new compact motion estimation (ME) process which reduced the number of gates and the power consumption to about a quarter and 1/8 of those of the conventional ME process respectively, while keeping good quality of picture. With the new ME process and power management function all over the codec chip, we realized the low power consumption of the codec. Total power consumption of the codec is only 500 mW. With this chip, we have also realized the first digital camera with an MPEG1 stream in the world.

A flexible scanning system for multi-format video cameras

A flexible pulse generating system for imager scanning was successfully developed. This system is suitable for digital processing video cameras which are controlled by a microcomputer and provides various image formats which are not only NTSC/PAL formats but also some suitable formats for video capture in multimedia use. >