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Full Index Complete FAQ Disk Topics What are the dimensions of a MD? What is the storage capacity of MDs, CDs, DATs, DCCs? The disc inside is 64 mm in diameter. What is the minimum allocation unit when recording on an MD? About 2 seconds for “SP” mode audio, 4 seconds for “SP” monaural, 4 seconds for “LP2” and 8 seconds for “LP4” mode audio.
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Audio information on Minidisc is organized in cluster units, which constitute the minimum unit for write or over-write of data to the disc. Each cluster contains 32 sectors of audio data, 3 “link sectors”, and 1 sector of “sub data”. Each sector is 2332 bytes, and 2 sectors are grouped together into a 4664 byte block holding 11 sound groups. What is the MD disc space allocation algorithm? ATRAC is always trying to give as much resolution as it can to each spectral component that it deems important. ATRAC is using all the bits per second it has available.
If it had more bits per second available it could use them, and record the signal with better sound quality. What’s the difference between the 60, 74 and 80 minute discs? 74′ blanks, they also run at 1. Will MDs of the future contain un-compressed data? Sony produces high density Minidiscs and drives with a capacity of about 650MB for their MD Camcoder. Such capacity would allow a CD’s worth of data to be stored uncompressed on an MD.
Will my MD player be able to play them? No, with their 4X increase in density the discs are physically incompatible with existing equipment. How does a pre-recorded MD differ from a recordable one? Physically, a pre-recorded MD is just like CD, using the same optical parameters, material, and production methods. Unlike recordable MD, pre-recorded MDs do not have the magneto-optical coating layers or the lubricating layers. They are made with the same plastic-aluminum structure as CDs, so there is no way to record or erase anything on them. Is there a difference in the disc layout of a recordable MD and pre-recorded MD?