No.160 November 2016

Presentations

  • High-throughput Video Data Transfer of Striping with SSDs for 8K Super Hi-Vision
    Takeshi KAJIYAMA,Kodai KIKUCHI and Eiichi MIYASHITA
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    ABSTRACT

    We have developed a high-throughput recording and playback method for full-specification 8K Super Hi-vision(8K)video whose data rate is up to 2.4GBps. The method fully exploits hardware with a specific design for handling large amounts of data, sequential transfer, and frame unit random reads including fast-forward, rewind and jog-shuttle. Steady recording and playback, including frame unit random reads, were demonstrated on an 8K recorder and player.
  • Magnetic Nanowire Memory Utilizing Motion of Magnetic Domains for Developing a High-speed Recording Device
    Mayumi KAWANA, Mitsunobu OKUDA and Yasuyoshi MIYAMOTO
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    ABSTRACT

    We have proposed magnetic memories utilizing parallel nanowires with no mechanical moving parts, in order to achieve ultra-high data transfer rates required for three-dimensional video. In an experiment, we used a structure consisting of a magnetic nanowire and a magnetic head used in a commercial hard disk drive, in which a pair of a write head and a read head was placed in line. A magnetic nanowire memory element was constructed by fixing the magnetic head onto a fabricated nanowire. We conducted a performance test of recording, bit-shifting, and detecting data in the memory element and succeeded in demonstrating the fundamental principle of the magnetic nanowire memory.
  • Methods for Stable Reproduction in Holographic Memory
    Nobuhiro KINOSHITA, Yutaro KATANO, Tetsuhiko MUROI and Norihiko ISHII
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    ABSTRACT

    A holographic memory has attracted attention as a candidate for a long-term video archival storage system. We have not only proposed new techniques that improve the recording density and data transfer rate of the holographic memory, but also studied methods for stable reproduction from the viewpoint of practical use. We have developed a wavefront compensation method for reproducing data appropriately even when the recording medium shrinks or expands, a reproduced data processing algorithm based on image processing, and an error correction code. In this report, we describe the wavefront compensation method and data processing methods and show the results of real-time reproduction of compressed 8K video data from holographic memory equipment using the developed methods.