HQCD refers to High Quality CD, an enhanced audio CD format. Similar to SHM-CD, a HQCD is made of an enhanced transparency polycarbonate material developed for use in LCD screens, which allows for better manufacturing quality and more accurate reading of the CD surface by a CD player laser. Also, a special alloy that is more reflective than the standard alumnimum is used in the CD's reflective layer. HQCDs are compatible with standard CD players.