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Autodesk Canada Co
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Individual
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Publication date
Priority claimed from GBGB9619120.0Aexternal-prioritypatent/GB9619120D0/en
Application filed by IndividualfiledCriticalIndividual
Priority claimed from CA002202725Aexternal-prioritypatent/CA2202725C/en
Publication of CA2394909A1publicationCriticalpatent/CA2394909A1/en
Application grantedgrantedCritical
Publication of CA2394909CpublicationCriticalpatent/CA2394909C/en
Signal Processing For Digital Recording And Reproducing
(AREA)
Television Signal Processing For Recording
(AREA)
Abstract
Video data in the form of a plurality of digitised frames, is stored on a plurality of magnetic disks. Each image frame is striped across a plurality of disks and redundant parity information, derived from the stripes, is written to an additional disk. Disk failure is detected and in response to this detection missing data is regenerated from the parity information. This allows the transfer of video data in real time to be maintained for output so that the system remains operational. While data is being read in real time, derived from regenerated data, the regenerated data is written to an operational disk, thereby reprotecting the data in the event of a subsequent failure. Frame supplied to output are labelled as being protected or unprotected and application programs may respond to this status information as considered appropriate.
Recording/reproducing method suitable for recording/reproducing av data on/from disc, recorder and reproducer for the method, information recording disc and information processing system