Digital transactions for the delivery of media files
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United States of America Patent
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-
Jun 13, 2006
Issued Date -
N/A
app pub date -
Jul 9, 2001
filing date -
Jul 8, 2000
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An incomplete/partly corrupted media file is delivered `in the clear`; in addition, a delta file is delivered to users meeting access control criteria which, when combined with the incomplete/partly corrupted parts allows a complete and uncorrupted version of the media file to be re-constructed. The method allows, in one implementation, a secure music purchase system to operate over digital radio: for example, the start of a song when played over the radio is usually deliberately talked over and the end cut short to prevent listeners being able to record a complete copy. With the present system, this practice can continue, but listeners can also purchase the missing or corrupted sections to enable them to possess a complete and uncorrupted version for playback.
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