altIf you’re waiting for 4K movies on Blu-ray to light up your 4K screen, you’ll be waiting a while longer. Initially it was hoped that a 4K format might be fixed in time for players to be released this Christmas — now the roll-out date is more likely end-2015. 

Victor Matsuda, Chairman of the Blu-ray Disc Association Global Promotions Committee, is reported as confirming that the BDA expects specifications to be complete in the first half of 2015, while also hoping to expand disc capacity to 66GB or 100GB in order to allow the desired higher frame rates up to 60fps, wider colour gamut and HDR dynamic range. But the format will also work on existing 50GB discs, with  HEVC/H.265 coding expected to form the basis of data compression on the new 4K discs. 

The spectre of HDCP 2.2 also hangs over the format — its inclusion might prevent current 4K sets from presenting an acceptable handshake for the new format.