CN106331759A - Method and device for downloading audio/video data - Google Patents
Method and device for downloading audio/video data Download PDFInfo
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- CN106331759A CN106331759A CN201610685450.8A CN201610685450A CN106331759A CN 106331759 A CN106331759 A CN 106331759A CN 201610685450 A CN201610685450 A CN 201610685450A CN 106331759 A CN106331759 A CN 106331759A
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4341—Demultiplexing of audio and video streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
Abstract
The invention discloses a method and device for downloading audio/video data and is used for realizing the purpose of downloading the audio/video data rapidly and conveniently. The method comprises the steps of starting a first thread, wherein a task management module is started by the first thread to obtain respective downloading addresses of multiple fragments of a TS (Transport Stream) file of to-be-downloaded audio/video data; and distributing the multiple fragments of the TS file to the first tread and a second thread through the task management module, and downloading the multiple fragments by the first thread and the second thread according to the downloading addresses of the multiple fragments.
Description
Technical field
The present invention relates to technical field of internet application, particularly to a kind of method and device downloading audio, video data.
Background technology
Along with the development of technology, broadcasting service and mobile service start gradually to merge, different content of multimedia and business
In different transmission over networks, user wishes to utilize different terminal units (such as smart mobile phone, panel computer etc.) not
These services can be enjoyed when accessing any network in the same time.
In correlation technique, Http stream (Streaming) transmission technology is used to realize the transmission of multi-medium data, i.e. audio frequency
Or audio/video is input in the media encoders of server by video input device, the audio/video of input is entered by media encoders
Row coding, generates TS (Transport Stream, transmission stream) file and exports after carrying out segmentation to flow point section apparatus, is sent to point
Transmitting apparatus, and generate the index file of this TS file, it is distributed to client by HTTP.But, current scheme only supports list
Thread is downloaded, and needs this technical problem of solution badly.
Summary of the invention
The present invention provides a kind of method and device downloading audio, video data, regards in order to realize quickly and conveniently downloading sound
The purpose of frequency evidence.
The present invention provides a kind of method downloading audio, video data, including:
Start first thread, described first thread start task management module, obtain the TS of audio, video data to be downloaded
The respective download address of multiple segmentations of file；
Described first thread and the second line is given by multiple segment assignments of described TS file by described task management module
Journey, is downloaded the plurality of point by described first thread and described second thread according to the respective download address of the plurality of segmentation
Section.
In an embodiment of the present invention, described method also includes:
After any thread in described first thread and described second thread has downloaded corresponding segmentation, generate table
Show the label information downloaded；
After determining according to described label information and having downloaded the plurality of segmentation, the plurality of segmentation is sent to client
Player, to play the plurality of segmentation.
In an embodiment of the present invention, described label information carrys out record by the form of array or chained list.
In an embodiment of the present invention, by described task management module by multiple segment assignments of described TS file to institute
State first thread and the second thread, including:
By described task management module, at least one segment assignments in multiple segmentations of described TS file is given described
First thread is downloaded, and determines whether there is the segmentation do not downloaded in the plurality of segmentation；
If it is determined that the plurality of segmentation exists the segmentation do not downloaded, then start the second thread, by described do not download point
Section is distributed to described second thread and is downloaded.
In an embodiment of the present invention, described second thread includes one or more thread.
The present invention also provides for a kind of device downloading audio, video data, including:
Acquiring unit, is used for starting first thread, described first thread start task management module, obtain sound to be downloaded
The respective download address of multiple segmentations of the TS file of video data；
Download unit, for giving described first by described task management module by multiple segment assignments of described TS file
Thread and the second thread, downloaded according to the respective download address of the plurality of segmentation by described first thread and described second thread
The plurality of segmentation.
In an embodiment of the present invention, described device also includes:
Label information signal generating unit, has downloaded for any thread in described first thread and described second thread
After becoming corresponding segmentation, generate and represent the label information downloaded；
Broadcast unit, for after determining according to described label information and having downloaded the plurality of segmentation, by the plurality of point
Section is sent to client player, to play the plurality of segmentation.
In an embodiment of the present invention, described label information carrys out record by the form of array or chained list.
In an embodiment of the present invention, described download unit is additionally operable to:
By described task management module, at least one segment assignments in multiple segmentations of described TS file is given described
First thread is downloaded, and determines whether there is the segmentation do not downloaded in the plurality of segmentation；
If it is determined that the plurality of segmentation exists the segmentation do not downloaded, then start the second thread, by described do not download point
Section is distributed to described second thread and is downloaded.
In an embodiment of the present invention, described second thread includes one or more thread.
In embodiments of the present invention, start first thread, first thread start task management module, obtain sound to be downloaded
The respective download address of multiple segmentations of the TS file of video data；Subsequently, by multiple by TS file of task management module
Segment assignments is to first thread and the second thread, by first thread and the second thread according under the respective download address of multiple segmentations
Carry multiple segmentation.As can be seen here, the embodiment of the present invention is distributed by the thread of task management module, utilizes first thread and second
Thread downloads multiple segmentations of TS file, it is achieved quickly and conveniently download the purpose of audio, video data.
Other features and advantages of the present invention will illustrate in the following description, and, partly become from description
Obtain it is clear that or understand by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Structure specifically noted in book, claims and accompanying drawing realizes and obtains.
Below by drawings and Examples, technical scheme is described in further detail.
Accompanying drawing explanation
Accompanying drawing is for providing a further understanding of the present invention, and constitutes a part for description, with the reality of the present invention
Execute example together for explaining the present invention, be not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 show in one embodiment of the invention the flow chart of the method downloading audio, video data；
Fig. 2 show in another embodiment of the present invention the flow chart of the method downloading audio, video data；
Fig. 3 show in one embodiment of the invention the structural representation of the device downloading audio, video data；And
Fig. 4 show in another embodiment of the present invention the structural representation of the device downloading audio, video data.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated, it will be appreciated that preferred reality described herein
Execute example be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Being illustrated in figure 1 in one embodiment of the invention the flow chart of the method downloading audio, video data, the method can be answered
Being used in mobile terminal (such as smart mobile phone, panel computer etc.), the method may comprise steps of S11-S12.
Step S11, starts first thread, first thread starts task management module, obtain audio, video data to be downloaded
The respective download address of multiple segmentations of TS file.
In this step, TS file refers to audio-video frequency content file, and its form is TS form.As introduced above, adopt at present
The transmission of multi-medium data, i.e. audio or video input equipment is realized by sound/regard by Http stream (Streaming) transmission technology
Frequency is input in the media encoders of server, and the audio/video of input is encoded by media encoders, generates the output of TS file
After carrying out segmentation to flow point section apparatus, it is sent to dispensing device, and generates the index file of this TS file, be distributed to by HTTP
Client.
Substantially belong to text transfer protocol due to http protocol, be not appropriate for real-time streaming media.Therefore, in order to
Facilitate implementation direct playing and playback (for time-shift service) and function that download limit, limit is seen, generally by programme content physically or logically
It is divided into the subsection of many.Client is every according to program indexing (Media Presentation Description, MPD) information
One or more segmentations of secondary downloads of media file play out, and wherein, the index etc. including partitioning in MPD information is believed
Breath, then plays the decoding data downloaded.Client progressive download also plays the segmental file of described TS file.
Such as, client can first obtain the index information of this TS file, it is also possible to obtain when this TS file play by needs
Take MPD (Media Presentation Description, the program indexing) information of this TS file, wherein, index information and
MPD message file can be in same file, it is also possible to be positioned in different file, and, in order to not change original TS file
Form, the description information (including key frame index information and/or MPD information) of TS file can be deposited in another file
In.The file of the index information of record TS file is referred to as the index file of TS file.
Step S12, by task management module by multiple segment assignments of TS file to first thread and the second thread, by
First thread and the second thread download multiple segmentations according to the respective download address of multiple segmentations.
In the alternative embodiment of the present invention, any thread in first thread and the second thread has been downloaded accordingly
Segmentation after, then generate and represent the label information downloaded；And then, download multiple segmentation when determining according to label information
After, multiple segmentations are sent to client player, to play multiple segmentation.Here label information can pass through array or chain
The form of table carrys out record.Such as, the element in array is set to 1 by task management module, an element respective file in array
A part (i.e. one segmentation), be also a thread task.If array is 1 array element from the beginning continuous, then will be from
The data stream of head continuous part is sent to client player (player), or notice player reads.
Above step S12 be passed through task management module by multiple segment assignments of TS file to first thread and the second line
Journey, embodiments provides a kind of optional scheme, and the program comprises the following steps A1-A2.
Step A1, by task management module by least one segment assignments in multiple segmentations of TS file to First Line
Journey is downloaded, and determines whether there is the segmentation do not downloaded in multiple segmentation.
Step A2, however, it is determined that there is the segmentation do not downloaded in multiple segmentations, then start the second thread, the segmentation that will do not download
Distribute to the second thread be downloaded.
In this step, the second thread can be a thread, it is also possible to be multiple threads.
It is described above the multiple implementation of each link in the embodiment shown in Fig. 1, below by a specific embodiment
Be discussed in detail the playing audio-video data of the present invention method realize process.
Being illustrated in figure 2 in another embodiment of the present invention the flow chart of the method downloading audio, video data, the method is permissible
Applying at mobile terminal, the method may comprise steps of S21-S25.
Step S21, the download event of monitoring audio/video data, when monitoring download event, obtain the first generation preset
The address of the source server of reason service, second agent's service and audio, video data to be downloaded.
In this step, the embodiment of the present invention pre-defines a class (comprising set method), and such inherits audio frequency and video number
According to the function (or method) of player, and this apoplexy due to endogenous wind also add the function for downloading audio, video data, described use
Include that first agent services in the function downloading audio, video data to service with second agent；First agent's clothes are obtained from this apoplexy due to endogenous wind
Business and second agent service.
Step S22, utilizes first agent to service the address with source server, obtains the m3u8 literary composition of audio, video data to be downloaded
Part, and by first agent's service, m3u8 file is resolved, obtain the source address of the TS file of audio, video data to be downloaded.
In this step, the address of source server is sent to first agent's service by set method, and set method call is play
The function of device, sends the request message of the m3u8 file obtaining audio, video data to be downloaded, wherein, carries in this request message
The address of first agent's service, is serviced according to the request message received and the address of source server by first agent, takes from source
The m3u8 file of audio, video data to be downloaded is obtained at business device.Specifically, first agent services the address according to source server, to
Source server sends the request of the m3u8 file obtaining audio, video data to be downloaded；First agent services reception source server and returns
The m3u8 file of audio, video data to be downloaded.
After first agent's service obtains the m3u8 file of audio, video data to be downloaded at source server, to m3u8 file
Resolve, obtain the source address of at least one TS file of audio, video data to be downloaded.Subsequently, first agent services at least
The source address modification of one TS file is the address that second agent services, and obtains amended m3u8 file；And then, first agent
The source address of at least one TS file is sent to second agent's service by service, and is sent to amended m3u8 file play
The function of device, to be serviced transmission acquisition at least one TS according to amended m3u8 file to second agent by the function of player
The request of file.
Step S23, utilizes second agent to service and the source address of TS file, starts First Line in second agent services
Journey, is started task management module by first thread, under multiple segmentations of the TS file obtaining audio, video data to be downloaded are respective
Set address.
Step S24, gives first by task management module by least one segment assignments in multiple segmentations of TS file
Thread is downloaded, and determines whether there is the segmentation do not downloaded in multiple segmentation.
Step S25, however, it is determined that there is the segmentation do not downloaded in multiple segmentations, then start the second thread, by dividing of not downloading
Section is distributed to the second thread and is downloaded.
After step s25, after any thread in first thread and the second thread has downloaded corresponding segmentation,
Then generate and represent the label information downloaded；And then, after determining according to label information and having downloaded multiple segmentation, by multiple points
Section is sent to client player, to play multiple segmentation.Here label information can be come by the form of array or chained list
Record.Such as, the element in array is set to 1 by task management module, and a part for an element respective file in array is (i.e.
One segmentation), also it is a thread task.If array is 1 array element from the beginning continuous, then by from the beginning continuous part
Data stream is sent to client player (player), or notice player reads.
It should be noted that in actual applications, above-mentioned all optional embodiments can be any in the way of using combination
Combination, forms the alternative embodiment of the present invention, and this is no longer going to repeat them.
Corresponding to the method downloading audio, video data in above-described embodiment, the present invention also provides for a kind of download audio frequency and video number
According to device.It is illustrated in figure 3 in one embodiment of the invention the structural representation of the device downloading audio, video data, including:
Acquiring unit 31, is used for starting first thread, described first thread start task management module, obtain to be downloaded
The respective download address of multiple segmentations of the TS file of audio, video data；
Download unit 32, for giving described the by described task management module by multiple segment assignments of described TS file
One thread and the second thread, by described first thread and described second thread according under the respective download address of the plurality of segmentation
Carry the plurality of segmentation.
In an embodiment of the present invention, as shown in Figure 4, the device that figure 3 above is shown can also include:
Label information signal generating unit 41, downloads for any thread in described first thread and described second thread
After completing corresponding segmentation, generate and represent the label information downloaded；
Broadcast unit 42, for after determining according to described label information and having downloaded the plurality of segmentation, by the plurality of
Segmentation is sent to client player, to play the plurality of segmentation.
In an embodiment of the present invention, described label information carrys out record by the form of array or chained list.
In an embodiment of the present invention, described download unit 32 is additionally operable to:
By described task management module, at least one segment assignments in multiple segmentations of described TS file is given described
First thread is downloaded, and determines whether there is the segmentation do not downloaded in the plurality of segmentation；
If it is determined that the plurality of segmentation exists the segmentation do not downloaded, then start the second thread, by described do not download point
Section is distributed to described second thread and is downloaded.
In an embodiment of the present invention, described second thread includes one or more thread.
The said apparatus of the embodiment of the present invention: starting first thread, first thread start task management module, acquisition is treated
Download the respective download address of multiple segmentations of the TS file of audio, video data；Subsequently, by task management module by TS file
Multiple segment assignments to first thread and the second thread, by first thread and the second thread according to the respective download of multiple segmentations
Multiple segmentations are downloaded in address.As can be seen here, the embodiment of the present invention is distributed by the thread of task management module, utilizes first thread
With multiple segmentations that the second thread downloads TS file, it is achieved quickly and conveniently download the purpose of audio, video data.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the reality in terms of the present invention can use complete hardware embodiment, complete software implementation or combine software and hardware
Execute the form of example.And, the present invention can use at one or more computers wherein including computer usable program code
The shape of the upper computer program implemented of usable storage medium (including but not limited to disk memory and optical memory etc.)
Formula.
The present invention is with reference to method, equipment (system) and the flow process of computer program according to embodiments of the present invention
Figure and/or block diagram describe.It should be understood that can the most first-class by computer program instructions flowchart and/or block diagram
Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
Instruction arrives the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce
A raw machine so that the instruction performed by the processor of computer or other programmable data processing device is produced for real
The device of the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame now.
These computer program instructions may be alternatively stored in and computer or other programmable data processing device can be guided with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in this computer-readable memory produces and includes referring to
Make the manufacture of device, this command device realize at one flow process of flow chart or multiple flow process and/or one square frame of block diagram or
The function specified in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that at meter
Perform sequence of operations step on calculation machine or other programmable devices to produce computer implemented process, thus at computer or
The instruction performed on other programmable devices provides for realizing at one flow process of flow chart or multiple flow process and/or block diagram one
The step of the function specified in individual square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to the present invention
God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof
Within, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. the method downloading audio, video data, it is characterised in that including:
Start first thread, described first thread start task management module, obtain the TS file of audio, video data to be downloaded
The respective download address of multiple segmentations；
Described first thread and the second thread is given by multiple segment assignments of described TS file by described task management module, by
Described first thread and described second thread download the plurality of segmentation according to the respective download address of the plurality of segmentation.
Method the most according to claim 1, it is characterised in that also include:
After any thread in described first thread and described second thread has downloaded corresponding segmentation, generate under representing
The label information carried；
After determining according to described label information and having downloaded the plurality of segmentation, the plurality of segmentation is sent to client terminal playing
Device, to play the plurality of segmentation.
Method the most according to claim 2, it is characterised in that described label information is remembered by the form of array or chained list
Record.
Method the most according to claim 1, it is characterised in that by described task management module by many for described TS file
Individual segment assignments gives described first thread and the second thread, including:
Described first is given by least one segment assignments in multiple segmentations of described TS file by described task management module
Thread is downloaded, and determines whether there is the segmentation do not downloaded in the plurality of segmentation；
If it is determined that the plurality of segmentation exists the segmentation do not downloaded, then start the second thread, the described segmentation do not downloaded is divided
Described in dispensing, the second thread is downloaded.
Method the most according to claim 4, it is characterised in that described second thread includes one or more thread.
6. the device downloading audio, video data, it is characterised in that including:
Acquiring unit, is used for starting first thread, described first thread start task management module, obtain audio frequency and video to be downloaded
The respective download address of multiple segmentations of the TS file of data；
Download unit, for giving described first thread by described task management module by multiple segment assignments of described TS file
With the second thread, described first thread and described second thread download described according to the respective download address of the plurality of segmentation
Multiple segmentations.
Device the most according to claim 6, it is characterised in that also include:
Label information signal generating unit, has downloaded phase for any thread in described first thread and described second thread
After the segmentation answered, generate and represent the label information downloaded；
Broadcast unit, for, after determining according to described label information and having downloaded the plurality of segmentation, sending out the plurality of segmentation
Give client player, to play the plurality of segmentation.
Device the most according to claim 7, it is characterised in that described label information is remembered by the form of array or chained list
Record.
Device the most according to claim 6, it is characterised in that described download unit is additionally operable to:
Described first is given by least one segment assignments in multiple segmentations of described TS file by described task management module
Thread is downloaded, and determines whether there is the segmentation do not downloaded in the plurality of segmentation；
If it is determined that the plurality of segmentation exists the segmentation do not downloaded, then start the second thread, the described segmentation do not downloaded is divided
Described in dispensing, the second thread is downloaded.
Device the most according to claim 9, it is characterised in that described second thread includes one or more thread.
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|---|---|---|---|
| CN201610685450.8A CN106331759A (en) | 2016-08-18 | 2016-08-18 | Method and device for downloading audio/video data |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610685450.8A CN106331759A (en) | 2016-08-18 | 2016-08-18 | Method and device for downloading audio/video data |
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| CN106331759A true CN106331759A (en) | 2017-01-11 |
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| CN201610685450.8A Pending CN106331759A (en) | 2016-08-18 | 2016-08-18 | Method and device for downloading audio/video data |
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| CN103929427A (en) * | 2014-04-23 | 2014-07-16 | 无锡天脉聚源传媒科技有限公司 | Dynamic multi-thread downloading device and method |
| CN103997544A (en) * | 2014-06-12 | 2014-08-20 | 网易（杭州）网络有限公司 | Resource downloading method and device |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7460126B2 (en) * | 2004-08-24 | 2008-12-02 | Silicon Graphics, Inc. | Scalable method and system for streaming high-resolution media |
| CN103716719A (en) * | 2013-12-02 | 2014-04-09 | 乐视网信息技术（北京）股份有限公司 | Multimedia file downloading method and user terminal |
| CN103929427A (en) * | 2014-04-23 | 2014-07-16 | 无锡天脉聚源传媒科技有限公司 | Dynamic multi-thread downloading device and method |
| CN103997544A (en) * | 2014-06-12 | 2014-08-20 | 网易（杭州）网络有限公司 | Resource downloading method and device |
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Application publication date: 20170111 |