TDK claims to have reached a landmark in the development of recordable media by announcing the prototype of <A HREF="http://www.eweek.com/article2/0,1895,2011200,00.asp?kc=EWNAVEMNL090106EOAD">a 200GB Blu-ray laser disc.</A> A 200GB Blu-ray laser disc doubles the capacity of TDK's existing 100GB Blu-ray prototype. One of TDK's new 200GB blue laser discs could store approximately 18 hours of high definition video (encoded at 24M bps), a TDK spokesperson said. The initial Blu-ray disc standard allows for 25GB single-layer Blu-ray discs and 50GB dual-layer discs. However, a recent signal processing innovation stretches the physical limits of optical media, realizing 33.3GB capacity for each of the disc's six layers, a TDK spokesperson said.