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Data processing methods and systems

A data processing system and data processing technology, applied in the field of data processing, can solve problems such as time-consuming calculations

Active Publication Date: 2010-04-14
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there are a large number of items in the STSC box, the correlation calculation will also be very time-consuming

Method used

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  • Data processing methods and systems
  • Data processing methods and systems
  • Data processing methods and systems

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Embodiment Construction

[0029] The present invention provides a data processing method and system, in which mechanisms such as pre-processed cache entry, shared cache pool and incremental processing are proposed. In the following embodiments, the data processing method and system are used to decode MPEG-4 files, which have been clearly defined in the ISO standard, and are not intended to limit the present invention. The overview of MPEG-4 archives has been proposed in the standard specification of ISO 14496-12, which can be combined for reference.

[0030] preprocessed cache entries

[0031] Figure 4 Items in the STTS box and their corresponding preprocessed cache items are displayed according to the embodiment of the present invention. Each cache entry records the cumulative total duration of a group of STTS box entries. In this embodiment, each group contains 3 STTS box items. like Figure 4 As shown, the end times of the STTS box items E1, E2 and E3 are recorded by the cache entry CE1, the e...

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Abstract

Data processing methods and systems for accessing a target sample in a media data stream. The media data stream has a plurality of samples and corresponding sample information recorded in at least oneentry, wherein the sample information for a predetermined number of the entries is calculated and the calculated result is stored in at least one cache entry. Target sample information correspondingtothe target sample is provided. One of the cache entries is located by comparing the target sample information with the calculated result of respective cache entries. After locating the cache entry,th e target sample from the entries is located corresponding to the located cache entry.

Description

technical field [0001] The present invention relates to data processing, and more particularly to a method and system for processing and accessing metadata in media files. Background technique [0002] A media file, such as an MPEG-4 file, includes media data and metadata of the media data. Metadata can provide a media application with enough sample information to process the media data in the archive. Typically a media archive is made up of various structural components. For example, MPEG-4 files are composed of structural elements called "boxes". Each box may contain media data, metadata, or other sub-boxes. For example, a STBL (sample table, sample table) box records time information and file information of media data. According to the information recorded in the STBL box, the application program can obtain the time, type, data size and location of the media file, and can use this information to perform functions such as playback and random search for the media file. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24
CPCH04N21/4331G06F17/30858H04N21/4325H04N21/85406G06F16/71
Inventor 苏展弘谢郁震
Owner MEDIATEK INC