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Data processing methods and systems and its machine readable media

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

Inactive Publication Date: 2007-03-28
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 and its machine readable media
  • Data processing methods and systems and its machine readable media
  • Data processing methods and systems and its machine readable media

Examples

Experimental program
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Embodiment Construction

[0032] 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 some embodiments, the data processing method and system are used to decode MPEG-4 files, which have been clearly defined in the ISO standard, which is not intended to limit the present invention. An overview of the MPEG-4 file has been proposed in the standard specification of ISO14496-12, which can be combined for reference and description. Additionally, in some embodiments, the data processing method and system is used to decode MP3 data. The data processing method and system can be used to decode other kinds of audio data without metadata, such as AAC, AMR / AWB.

[0033] Preprocessed cache items:

[0034] First, decoding of MPEG-4 files using the data processing method and system will be described.

[0035] FIG. 4 shows items in an STTS box and their corresponding preprocessed cache ...

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PUM

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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 one entry, 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 corresponding to the 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, the target sample from the entries is located corresponding to the located cache entry. The invention can find out one of the cache entries by comparing the target sample information with the calculated result of respective cache entries. After locating the cache entry, the target sample is rapidly located corresponding to the located cache entries.

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 file. Usually media files are composed of various structural elements. 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 play and randomly search for the media file. The STBL box also contains multiple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30H04N7/26
CPCH04N21/4331G06F17/30858H04N21/4325H04N21/85406G06F16/71
Inventor 苏展弘谢郁震叶人凤
Owner MEDIATEK INC
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