Patent ID: 7895391
Filing Date: 2011-02-22
Classification: G11B,H04N

Abstract:
1. Method for reading a record medium, the method comprising acts of: selecting one of a plurality of alternative information streams recorded on the record medium in an interleaved manner, wherein a track of the record medium contains a succession of consecutive interleaved units, each interleaved unit comprising one corresponding portion of each one of the plurality of alternative information streams; and wherein each one of the plurality of alternative information stream portions has a plurality of entry points within a given interleaved unit; reading the alternative information stream portion of the selected one of the plurality of alternative information streams associated with one interleaved unit; storing the alternative information stream portion of the selected one of the plurality of alternative information streams read into a buffer memory; outputting the alternative information stream portion of the selected one of the plurality of alternative information streams from the buffer memory; receiving a command to change to an other one of the plurality of alternative information streams; determining a next entry point of the alternative information stream portion of the selected one of the plurality of alternative information streams; continuing to read the alternative information stream portion of the selected one of the plurality of alternative information streams until the next entry point of the alternative information stream portion of the selected one of the plurality of alternative information streams is reached; jumping within the one interleaved unit to an entry point of the portion of the other one of the plurality of alternative information streams, wherein the act of jumping comprises an act of jumping within the one interleaved unit to the entry point of the portion of the other one of the alternative information streams that corresponds to the next entry point of the alternative information stream portion of the selected one of the plurality of alternative information streams.