Methods for reserving index memory space in avi recording apparatus

Abstract

A method for reserving memory space for storing chunk sizes during Audio Video Interleave (AVI) recording, wherein an AVI file contains a plurality of interleaved audio-video (A/V) chunks, includes: recording the AVI file sizes to the second storage; when the second storage reaches capacity, moving at least a first A/V chunk size to the first storage; and after the recording has finished, reading stored A/V chunks from the first storage to the second storage to create an index chunk.

1 . A method for reserving index memory space of a buffer during recording, a file comprising a plurality of interleaved audio-video (A/V) chunks, the method comprising:
 providing a first storage;   providing a second storage;   recording the A/V chunks of the file;   storing an A/V chunk size to the second storage;   when the second storage reaches capacity, moving at least a first A/V chunk size to the first storage; and   after the recording has finished, reading stored A/V chunk sizes from the second storage, and from the first storage, if any, to create an index chunk for the file.   
     
     
         2 . The method of  claim 1 , wherein the step of moving at least a first A/V chunk size to the first storage comprises:
 keeping the A/V chunk sizes of A/V chunks corresponding to a most recent predetermine period in the second storage; and   moving the A/V chunk sizes of A/V chunks corresponding to earlier time from the second storage to the first storage.   
     
     
         3 . The method of  claim 1 , wherein a data access speed of the second storage is greater than a data access speed of the first storage. 
     
     
         4 . The method of  claim 3 , wherein the first storage is a hard disk drive. 
     
     
         5 . The method of  claim 3 , wherein the first storage is a Compact Flash (CF) card. 
     
     
         6 . The method of  claim 3 , wherein the second storage is a ring buffer.