Multimedia data processing method and processing system suitable for digital media broadcast

Abstract

The invention discloses a multimedia data processing method and processing system suitable for digital media broadcast. The processing system comprises a storage medium for storing files, a storage space index module for providing index information of vacant continuous space blocks on the storage medium, a file index module for storing index entries of video files written to the storage medium, and an index structure for providing video index information and video data information, wherein the video index information comprises frame index information of the video files, and the video data information comprises an I-frame positive sequence, an I-frame reverse sequence and original video files. The multimedia data processing method and processing system suitable for digital media broadcast are adopted, so that a plurality of coding forms are supported, the same quantity of IO (input output) resource is consumed in normal broadcast and multi-time broadcast, the IO performance is sustained and stable, the access efficiency is high, the reading and writing efficiency is high, and a lot of disk fragmentations are not generated.

Description

technical field [0001] The invention relates to a data processing method and a processing system thereof, in particular to a multimedia data processing method and a processing system suitable for digital media broadcasting. Background technique [0002] In the broadcast link, specific business functional requirements include normal broadcast of files, random positioning based on time, fast forward and fast rewind operations. In the absence of an index, time-based random positioning needs to traverse the file from the beginning, which requires a long preparation time. For the functional requirements of fast forward and fast rewind, fast forward and fast rewind at X times the speed are relatively normal broadcasting of files. The pressure on the disk will also increase by X-1 times, especially in the case of VOD on-demand, where there are many fast-forward and fast-back operations, and the probability and timing of occurrence cannot be predicted, it will not be possible to acc...

AI Technical Summary

Problems solved by technology

In the absence of an index, time-based random positioning needs to traverse the file from the beginning, which requires a long preparation time. For the functional requirements of fast forward and fast rewind, fast forward and fast rewind at X times the speed are relatively normal broadcasting of files. The pressure on the disk will also increase by X-1 times, especially in the case of VOD on-demand, where there are many fast-forward and fast-back operations, and the probability and timing of occurrence cannot be predicted, it will not be possible to accurately calculate the actual performance of the server. load

For the realization of functions such as X-speed fast forward and fast rewind, the server cannot simply broadcast the file at X-speed, because this will firstly require X-times transmission bandwidth, and secondly, it will cause decoding confusion to the decoding terminal

[0003] In addition, the primary issue considered by general-purpose file systems is to ensure the security of file storage and the utilization efficiency of disks. The block size is usually only a few kilobytes to tens of kilobytes. With the import and deletion of a large number of media files, in A large number of disk fragments will be caused on the disk, which will seriously affect the IO efficiency of the disk. In severe cases, it may even require downtime to defragment the disk, which is absolutely unacceptable in some broadcasting links

And the general file system has a fixed block size, and its goal is to improve the storage efficiency of files with discrete distribution of file size; the general file system only considers storage, does not consider the control of read and write bandwidth, and cannot guarantee the read response time of the broadcast link. High standard requirements; the general file system does not consider the correlation between files, and has the following disadvantages:

[0006] In situations where operations such as fast forward and fast rewind are required, the IO request bandwidth to the disk cannot be measured

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