IEC 62403:2005 specifies the HD-BURN format applied to CD-R/RW discs. The HD-BURN system is capable of recording the information in double density compared to the conventional CD-R/RW disc. It enables the realization of products with high reliability, high speed and interchangeability, and is especially suitable for consumer applications with high cost-performance. It describes: - the physical characteristics for the recording and playback; - the track structure of a disc, the data structure in the track; - logical format structure.