The Journal of The Institute of Image Information and Television Engineers
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
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Volume 66, Issue 3
Displaying 1-28 of 28 articles from this issue
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Focus
Massege from Honorary Member : For Members Carrying on Next Generation
Special Issue
The Latest Trend of Image Sensor Technologies
1. Review on 2011 IISW
2. Recent Technology Trend on High Speed CMOS Image Sensors
3. Technology Trend and Direction of Image Sensor with Overlaid Organic Photoelectric Conversion Layer
4. Progress in Development of FEA-HARP Imaging Device
Special Issue
Action after the Great East Japan Earthquake
Technical Guide
Technology Frontier of Augmented Reality(3)
Keywords you should know(74)
Activity Notes on Standardization(19)
My Recommendations on Research and Development Tools(57)
Journey into Media Arts(23)
Media Watch(3)
Report
News
  • Energy Reduction Method by Multicore Processors during Execution of Multimedia Programs
    Keisuke Toyama, Shun Kubota, Shuichiro Yamamoto, Hideo Maejima
    2012 Volume 66 Issue 3 Pages J74-J84
    Published: 2012
    Released on J-STAGE: February 24, 2012
    DOIhttps://doi.org/10.3169/itej.66.J74
    JOURNAL FREE ACCESS
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    Mobile appliances need to work at a low level of power as well as perform at a high level. As energy consumption and execution speed are in a reciprocal relation, using a combination of a multicore processor system and its controlling software is a key to reducing energy. We are developing an on-chip multicore architecture for embedded systems with high performance at low power and cost. We propose a method of reducing the energy consumed for this system during execution by parallelizing and applying Dynamic Voltage Frequency Scaling (DVFS) to each element processor in accordance with its workload. The program's workload at runtime needs to be accurately estimated, and the most appropriate frequency and voltage for each processor running an application is chosen. We propose and evaluate a method for predicting the progress of an application by inserting checkpoints and getting a minimal number of processors for the least energy.
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  • Foveated Vision System with Omnidirectional Camera
    Youn-Whan Oh, Kazuhiro Shimonomura
    2012 Volume 66 Issue 3 Pages J85-J87
    Published: 2012
    Released on J-STAGE: February 24, 2012
    DOIhttps://doi.org/10.3169/itej.66.J85
    JOURNAL FREE ACCESS
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    We describe a foveated camera using two cameras, a perspective camera and an omnidirectional camera. The omnidirectional camera is used to build a peripheral view field, which has a wide view angle. The perspective camera is used to build a central view field (fovea), which has high resolution. This camera arrangement makes it easy to compute the direction to the target in the peripheral view field. We propose a method for compensating for the error of estimation of the target direction for this foveated camera.
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  • Evaluation of Transmission Performance of MIMO Multiplexing in 42-GHz Band by using Orthogonal Polarization in Line-of-Sight Environment
    Shinichi Suzuki, Takayuki Nakagawa, Tetsuomi Ikeda
    2012 Volume 66 Issue 3 Pages J88-J92
    Published: 2012
    Released on J-STAGE: February 24, 2012
    DOIhttps://doi.org/10.3169/itej.66.J88
    JOURNAL FREE ACCESS
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    We have been developing a wireless high-definition television (HDTV) camera called "millimeter-wave mobile camera". In this development, low-compression HDTV transmission with low latency and high link reliability is required, so an application of the multiple-input multiple-output (MIMO) technique and millimeter-wave band for the camera was examined. In this paper, to use the camera in a line-of-sight environment, the outdoor transmission performance of a MIMO multiplexing transmission device equipped with orthogonal polarized omnidirectional antennas was measured. In conclusion, it was confirmed that MIMO channel correlation was reduced to less than 0.45 and the BER performance became better.
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