New Communications Patent From Sony Lists ATSC 3.0 Framer as Inventor

Sony landed a U.S. patent Tuesday for a “method and apparatus for transmitting a-priori information in a communication system,” Patent and Trademark Office records show. A-priori information is that which is based on scientific deduction rather than observed, empirical data. The patent (9,326,295) is based on a December 2014 application and lists as its inventor Luke Fay, senior staff engineer at Sony Electronics in San Diego. Fay is chairman of ATSC’s S-32 specialist group that framed ATSC 3.0's physical layer, which is now before the FCC as an authorization petition (see 1604130065). Fay also is vice chairman of ATSC’s Technology Group 3, which is supervising development of the overall ATSC 3.0 standard. “During the last decade, terrestrial broadcasting has evolved from analog to digital,” Fay’s patent says. “There exist several wideband digital communication techniques depending on a broadcasting standard used,” including OFDM, which is “a method of encoding digital data on multiple carrier frequencies and is used in applications such as digital television and audio broadcasting, DSL Internet access, wireless networks, power line networks, and 4G mobile communications,” the patent says. Though the patent doesn’t say so, OFDM is the modulation system used in ATSC 3.0 and has been used for years by Europe’s DVB consortium. “Current digital broadcasting systems use fixed knowledge of a channel bandwidth at a receiver,” the patent says. “In addition to the specific information about the communications technology used, the receiver needs the channel bandwidth or a sampling frequency to demodulate received signals. Due to technical advancements, the channel bandwidth and the sampling frequency may change over the years. As recognized by the present inventor, there is a need to facilitate changes in channel bandwidth and/or sampling frequency.”