HD DVD BD9 formats. HD Rec is an extension of the HD DVD format for recording HD content on regular red laser DVD-Rs/DVD-RWs using H.264/MPEG-4 AVC compression. It was approved by the DVD Forum on September 12, 2007 It is comparable to Blu-ray Disc's AVCREC. The China Blue High-definition Disc (CBHD), a high-definition optical disc format, was based upon the HD DVD format. Like the HD DVD, CBHD discs have a capacity of 15 GB single-layer and 30 GB dual-layer and can use existing DVD production lines. Unlike the HD DVD format, industry support for this format has grown steadily. HD DVD
Optical disc packaging has largely been replaced with the DVD keep case and CD jewel case due to its flimsy design. Warner Brothers and New Line Cinema were the only major film studios to release DVDs in this format. Soft cases, also known as Earth cases or Green cases, are soft-shell cases made from recycled optical discs. They are considerably more pliable than other style cases given that they are made from various mixes of plastics. They are sold by various companies as replacements for disc owners who are environmentally friendly and can be differentiated from other cases by their opaque appearance. The