Appeal No. 96-1421
Application 08/065,773
controlled based on amount of data in memory". The subject
matter of the invention is an apparatus and a method for reading
out and time-base expanding information from a recording medium.
(Paper 1 at 1.)
2. An example would be a portable mini disk (MD) player
used for audio recordings. Information can be read from an MD
into a semiconductor memory (e.g., random access memory or RAM)
much faster than it can be expanded and read out from the RAM.
(Paper 1 at 1.) The data being expanded is stored in the
semiconductor memory. (Paper 1 at 2.)
3. The difference in the output rate of the disk and the
output rate of the semiconductor memory permits the MD to be made
"shock proof", i.e., resistant to physical shocks and other
disruptions. Since disk output is much faster, the disk-reading
apparatus can use the idle time (time spent waiting for the
semiconductor memory to catch up) to correct mistakes in position
caused by disruptions. (Paper 1 at 2-3.)
4. Applicants note that power for portable MD players
usually comes from batteries. Hence, power conservation is a
concern. (Paper 1 at 3-4.) They propose to address this problem
by turning the power to the disk-reading apparatus off during at
least some of the idle time. (Paper 1 at 5.)
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