Kobe University Assigned Patent

National University Corporation Kobe University, Hyogo, Japan, has been assigned a patent (8,976,638) developed by Matoba, Osamu, Kobe, Japan, for a “holographic memory information encoding method, holographic memory recording method, and holographic memory device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Provided is an information encoding method and a holographic memory device which increase the amount of information per page of a holographic memory and reduce the bit error rate to ensure a larger multiplexing number. The holographic memory information encoding method expresses information of signal page data in a holographic memory as a multi-stage data using different resolution by block coding, and superimposes each data on a single page of signal page data. The multi-stage data using different resolution is realized by light amplitude data and phase data. The amplitude data is divided by area through block coding. When n odd-numbered ON bits exist in a divided area of the phase data, a phase of 2.pi.s/n, where n and s are natural numbers) is imparted as s-th phase information to one value of binary data, and the same phase is imparted to the other value of binary data.“

The patent application was filed on August 15, 2012 (14/130,445).