Method and apparatus for multimedia editing and data recovery

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364DIG1, 36422281, 3642823, 3642831, 3642824, G06F 1730

Patent

active

055749054

ABSTRACT:
A specialized linked-list editing structure is used to order multimedia file segments in a multimedia file to be edited. Each multimedia file segment is comprised of a number of contiguous data units, which may preferably be bytes, that are portions of the overall multimedia file even though the file segments may be physically located in different data files. The linked list is arranged as a plurality of nodes where each node represents a single file segment and the linked list orders all of the file segments to make up the entire multimedia file. Accordingly, editing can be performed at the data unit level so that both compressed and uncompressed files can be handled. Editing operations on the file result in changes to this linked-list structure instead of the file itself, thus avoiding the necessity of making file copies. More particularly, the linked-list structure consists of a list of records called "file descriptor nodes". Each node comprises a record which contains information about a corresponding file segment, including, the address of the physical file in which the segment is located, the physical position of the segment in its file, the length in data units of the segment and a "logical starting position" number which indicates the position of the file segment relative to other segments in the overall multimedia file so that a particular segment can be located during a seek operation.

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