Mark Krivosheev
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Mark Iosifovich Krivosheev (July 30, 1922 ā October 16, 2018) was a Soviet and Russian engineer and academic who made pioneering contributions to the development of television technology as a head of television study groups at CCIR and ITU-R. He was a key figure in establishing Rec. 601 and Rec. 709 technical standards for digital television broadcasting.