CN102594773A - Method and system for realizing data acquisition - Google Patents

Method and system for realizing data acquisition Download PDF

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Publication number
CN102594773A
CN102594773A CN2011100041811A CN201110004181A CN102594773A CN 102594773 A CN102594773 A CN 102594773A CN 2011100041811 A CN2011100041811 A CN 2011100041811A CN 201110004181 A CN201110004181 A CN 201110004181A CN 102594773 A CN102594773 A CN 102594773A
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China
Prior art keywords
rap
index information
information
index
identify
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Granted
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CN2011100041811A
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Chinese (zh)
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CN102594773B (en
Inventor
赵宇
阳彦字
王芳
孙健
陈翼
李加周
阮亚平
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ZTE Corp
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ZTE Corp
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Priority to CN201110004181.1A priority Critical patent/CN102594773B/en
Priority to PCT/CN2012/070198 priority patent/WO2012094992A1/en
Publication of CN102594773A publication Critical patent/CN102594773A/en
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Publication of CN102594773B publication Critical patent/CN102594773B/en
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    • 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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • 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
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/613—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for the control of the source by the destination
    • 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
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26258—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
    • 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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
    • 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 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • 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 
    • H04N21/65—Transmission of management data between client and server
    • H04N21/658—Transmission by the client directed to the server
    • H04N21/6587—Control parameters, e.g. trick play commands, viewpoint selection
    • 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
    • H04N21/8455—Structuring of content, e.g. decomposing content into time segments involving pointers to the content, e.g. pointers to the I-frames of the video stream
    • 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 a system for realizing the data acquisition, both of which can include, in the segmentation of a TS (Transport Stream) code stream, index information used for identifying media segmentation information, and can also acquire frames at the position of an RAP (Random Access Point) to be played in a trick mode or during the switching of a file according to the media segmentation information included in the index information. The method and the system of the invention can achieve the data acquisition technology, during fast forward/fast backward or the switching of a media stream, a client can quickly locate the start and the stop positions of the RAP to be played, and only corresponding frames are downloaded for playback. Moreover, the client can also smoothly switch to such play modes as normal play, time shifting or the like. Thus data downloaded in the trick mode or during the switching of the file can be reduced effectively, and the fluency of the play and the user satisfaction can be improved significantly.

Description

A kind of method and system of realizing that data are obtained
Technical field
The present invention relates to the communications field, be specifically related to a kind of method and system of realizing that data are obtained.
Background technology
Along with technical development, the streaming media service based on http protocol has appearred, and promptly HTTP Streaming is professional.In recent years, broadcasting service and mobile service begin to merge gradually, and different content of multimedia transmits on various network with professional.The MPEG2-TS that is used to broadcast uses also comparatively extensive on the internet.Equally, MPEG2-TS also is applied on the HTTP Streaming business.
Because http protocol belongs to text transfer protocol in essence, and be not suitable for real-time Streaming Media transmission.For the ease of realizing direct playing and playback (to time-shift service) and the function of seeing while downloading, common with programme content at physics or be divided into a lot of subsections in logic, as shown in Figure 1.(Media Presentation Description, MPD) one or more segmentations of each downloads of media file are carried out decodes and plays to data downloaded to client then according to the program index table that comprises the information such as index of partitioning.But for the fast forwarding and fast rewinding function; Common way is to download corresponding segmentation according to MPD; And then (Random Access Point RAP) plays, and the data of non-like this RAP also all can be downloaded to find corresponding random access point in the segmental file; Therefore client will be downloaded a lot of unnecessary data, has a strong impact on the fluency of broadcast and too much takies the network bandwidth.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system of realizing that data are obtained, and data downloaded when switching to reduce special-effect mode or file improves the fluency of playing.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method that realizes that data are obtained; In the segmentation of TS code stream, include the index information that is used for the identification medium segment information; This method also comprises: according to the partitioning information that said index information comprised, obtain the frame at the random access point R AP place that need play when special-effect mode or file switch.
The method that said index information is set is: in the segmentation of each TS code stream, add one and be used to identify this partitioning information index;
Said index information comprises following indication at least: whether comprise RAP sign or RAP number;
When RAP, said index information further comprises and is used to identify the offset address that each RAP is ordered, and the length that is used to identify each RAP.
Said index information further comprise following one of at least:
The total length of RAP index information;
The RAP type is used to identify the type of corresponding segmentation RAP;
The RAP timestamp information is used to identify the corresponding reproduction time of each RAP;
Carry the program identification PID of the code stream of RAP.
The process of obtaining the frame at said RAP place according to the partitioning information that said index information comprised comprises:
Download and resolve the partitioning information that index information comprised;
From said partitioning information, parse skew and the length of the RAP that will obtain, and the frame at this RAP place is downloaded in request in view of the above.
One of below said special-effect mode comprises at least:
Skip forward/back, F.F. become a full member normal broadcasts, time shift positioning playing, file switching.
A kind of system that realizes that data are obtained, this system comprise that index information maintenance unit, data obtain performance element; Wherein,
Said index information maintenance unit is used for being provided in the segmentation of TS code stream the index information of identification medium segment information, and the advisory of this index is obtained performance element to data;
Said data are obtained performance element, are used for the partitioning information that comprises according to said index information, obtain the frame at the RAP place that need play when special-effect mode or file switch.
When said index information maintenance unit is provided with said index information, be used for: add one in the segmentation of each TS code stream and be used to identify this partitioning information index;
Said index information comprises following indication at least: whether comprise RAP sign or RAP number;
When RAP, said index information further comprises and is used to identify the offset address that each RAP is ordered, and the length that is used to identify each RAP.
Said index information further comprise following one of at least:
The total length of RAP index information;
The RAP type is used to identify the type of corresponding segmentation RAP;
The RAP timestamp information is used to identify the corresponding reproduction time of each RAP;
Carry the PID of the code stream of RAP.
When said data are obtained performance element and obtained the frame at said RAP place according to the partitioning information that said index information comprised, be used for:
Download and resolve the partitioning information that index information comprised;
From said partitioning information, parse skew and the length of the RAP that will obtain, and the frame at this RAP place is downloaded in request in view of the above.
One of below said special-effect mode comprises at least:
Skip forward/back, F.F. become a full member normal broadcasts, time shift positioning playing, file switching.
The inventive method and system; Realize the technology that data are obtained, client can navigate to the RAP starting and ending position that needs broadcast fast in skip forward/back, when Media Stream switches; Only download corresponding frame and play, and can take over seamlessly play mode such as normal play or time shift; Thereby data downloaded can effectively reduce special-effect mode or file and switch the time, obviously improve the fluency of playing, and can significantly improve user satisfaction.
Description of drawings
Fig. 1 is the structural representation of prior art MPEG2-TS logic section;
Fig. 2 is the MPEG2-TS logic section and the RAP index segmented structure sketch map of the embodiment of the invention;
Fig. 3 is the sketch map of the generation RAP information segmenting of the embodiment of the invention;
Fig. 4 is the flow chart of the realization F.F. of the embodiment of the invention;
The flow chart that Fig. 5 becomes a full member and often plays for the realization F.F. of the embodiment of the invention;
Fig. 6 is the flow chart of the realization time shift positioning playing of the embodiment of the invention;
The general flow chart that Fig. 7 obtains for the realization data of the embodiment of the invention;
The system diagram that Fig. 8 obtains for the realization data of the embodiment of the invention.
Embodiment
In practical application; To MPTS (TS) file under the Http Streaming scene; Client is in skip forward/back, when Media Stream switches; Hope to navigate to the RAP starting and ending position that needs broadcast fast, and only download corresponding frame, can also take over seamlessly play mode such as normal play or time shift to play.
As shown in Figure 2, can add one in the segmentation front of each TS code stream and be used to identify this partitioning information index.Certainly, in practical application, also can add said index at the back in the segmentation of each TS code stream.Fig. 3 is the sketch map of RAP information segmenting, and the RAP information that said index comprises is following:
The total length of RAP index information comprises this field.This field can be used for abandoning the RAP index data sowing time in normal point.This information is optional content.
Whether comprise RAP sign or RAP number; This information is essential content.
RAP type: the type of the segmentation RAP that this component identification is corresponding; This information is optional content.
Program identification (PID): the PID that carries the code stream of RAP.
The offset address of RAP: identify the offset address that each RAP is ordered; This information is optional content.When RAP, this field must exist; Otherwise this field does not exist.
The length of RAP: the length that identifies each RAP point place key frame; This information is optional content.When RAP, this field must exist; Otherwise this field does not exist.
RAP timestamp information: identify the corresponding reproduction time of each RAP; This information is optional content.
Need to prove, except that essential content, RAP information can comprise in the above content one of at least.
Based on above-mentioned index structure, can carry out methods such as following skip forward/back, positioning playing, switching.
The method of A, realization fast forwarding and fast rewinding
Further, said steps A comprises:
A1, client receives trick command (as: skip forward/back);
A2 confirms next RAP address (like URL);
Client is confirmed the segmentation at next RAP place according to current reproduction time and skip forward/back order; From this segmentation, obtain index information and form the address of this RAP frame, comprising basic URL (base url of segment)+bytes range (byte range) of URL, segmentation etc.;
According to the parameter (like multiple) of skip forward/back, confirm to download the interval of RAP frame;
A3, corresponding RAP frame of client downloads and decoding and displaying.
The method that B, realization fast forwarding and fast rewinding are become a full member and often play
Further, said step B comprises:
B1 carries out corresponding skip forward/back operation after changing the skip forward/back multiple into 1 times, is immediate updating accessing points (IDR) up to the RAP that downloads;
B2 obtains skew and the length of this RAP from the RAP information segmenting;
B3, client-requested is downloaded the data of this all TS segmentation of this RAP back, and after downloading, changes normal play into.
The method of C, realization time shift location program request
Further, said step C comprises:
C1 finds corresponding TS segmentation according to time shift program request time point;
C2 calculates time that represents of this time shift program request point.Find the corresponding RAP information segmenting URL of this segmentation according to MPD, this RAP information segmenting is downloaded in request;
C3 resolves this RAP information segmenting, finds PTS to represent the time more than or equal to the program request point and the RAP type is the RAP of IDR;
C4, client-requested is downloaded the data of this all TS segmentation of this RAP back, and after downloading, changes normal play into.
The method that D, realization Media Stream switch:
Further, said step D comprises:
D1: the network bandwidth changes, and client or system detect this variation, and confirms to carry out Media Stream and switch (as switching to media file 2 from the media file 1 with character such as different resolution);
D2: client is confirmed switching position according to current reproduction time and segment information (like media file 2 corresponding segmentations, temporal information and RAP information);
D3: the partitioning at client-requested switching position place (like the segmentation of media file 2), decoding and frame of display data realize the switching of medium self adaptation.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing and specific embodiment to describe the present invention below.
Need to prove that execution mode of the present invention is to adopt MPEG2-TS as the media file storage form on the streaming media server, what it was carried out is logic section.Add the RAP information of this segmentation in the front of MPEG2-TS logic section.So that when carrying out operation such as skip forward/back, positioning playing, can find corresponding RAP fast, to improve the disposal ability of server end.
And, in practical application, in the past normal program request and live need are abandoned the RAP message part simply.First field of RAP index information is exactly the total length of RAP index.According to this length, client can abandon the RAP index information easily.The user is when carrying out special-effect mode, and server and client side's exchange flow process changes to some extent.As shown in Figure 4, use the present invention can quicken searching afterwards to RAP.Flow process shown in Figure 4 may further comprise the steps:
Step 401, F.F. begins.
Step 402 judges whether F.F. finishes.If finish, then jump to step 410; Otherwise jump to step 403.
Step 403 is confirmed the segmentation that next RAP belongs to according to current reproduction time and F.F. multiple.
Step 404 judges whether the corresponding RAP index information of this segmentation is downloaded.If then jump to step 406; Otherwise jump to step 405.
Step 405 finds the positional information of this TS segmentation in MPD.Download preceding 1024 bytes of this segmentation.The RAP index information is in the beginning position of TS segmentation, and less because of the RAP index information, and 1024 bytes are enough big, therefore do not need record-shifted and big or small in MPD for RAP information again.
The RAP index information that step 406, client resolve to be downloaded (be the partitioning information that index information comprises, below also with).
Step 407 is obtained skew and the length of RAP.
Step 408, the frame at this RAP place is downloaded in the user end to server request.
Step 409, the frame at the RAP place that client process is downloaded jumps to step 402 afterwards.
Step 410 finishes.
It is thus clear that, be provided with on the basis of index information, can download and resolve the partitioning information that index information comprises, from said partitioning information, parse skew and the length of the RAP that will obtain again, and the frame at this RAP place is downloaded in request in view of the above.
When normal the broadcast become a full member in F.F., can carry out flow process as shown in Figure 5, this flow process may further comprise the steps:
Step 501, F.F. are become a full member and are often play beginning.
Step 502, last RAP when obtaining F.F..
Step 503, judge whether this RAP is IDR.If then jump to 507; Otherwise, jump to step 504.
Step 504 is carried out forwarding operation after changing the F.F. multiple into 1 times.
Step 505, forwarding operation.
Step 506 is obtained next RAP, and jumps to 503.
Step 507 is obtained skew and the length of this RAP from the RAP information segmenting.
Step 508, client-requested are downloaded the data of this all TS segmentation of this RAP back.
Step 509, next segmentation transfers the normal play flow process to.
Step 510 finishes.
When carrying out the time shift positioning playing, can carry out flow process as shown in Figure 6, suppose that live among Fig. 6 has only video flowing, promptly has only a track in the code stream.Flow process shown in Figure 6 may further comprise the steps:
Step 601, the time of obtaining the time shift positioning playing.
Whether the time that step 602, judgement are obtained is Coordinated Universal Time(UTC) (UTC), if then jump to step 604; Otherwise jump to step 603.
Step 603, transfer time of time shift positioning playing to the UTC time.
Step 604 is obtained the beginning UTC of TS file from MPD.
Step 605 calculates time that represents of program request time point.
Step 606, each segmentation that traversal writes down among the MPD initial represents the time, calculates the segmentation at this broadcast point place.
Step 607 is obtained the positional information of segmentation from MPD, download preceding 1024 bytes.Because the RAP index information is in the beginning position of TS segmentation, and less because of the RAP index information, 1024 bytes are enough big, and therefore not needing is that RAP information is record-shifted and big or small in MPD again.
Step 608 travels through this RAP index information, and finding the RAP type in view of the above is IDR and the PTS RAP that represents the time more than or equal to the program request time point.
Step 609 according to skew and the URL big or small and this TS segmentation of this RAP, constructs the URL of all data of this later segmentation of this RAP, and downloads to server requests.
Step 610, next segmentation transfers the normal play flow process to.
Can know that in conjunction with above each embodiment the present invention realizes that the operation thinking that data are obtained can represent flow process as shown in Figure 7, this flow process may further comprise the steps:
Step 710: the index information that in the segmentation of TS code stream, is provided for the identification medium segment information.
Step 720:, obtain the frame at the RAP place that need play when special-effect mode or file switch according to the partitioning information that said index information comprised.
In order to guarantee that each above-mentioned embodiment and operation thinking can realize smoothly, can carry out setting as shown in Figure 8.Referring to Fig. 8, the system diagram that Fig. 8 obtains for the realization data of the embodiment of the invention, this system comprises that continuous index information maintenance unit, data obtain performance element.
When concrete the application, the index information maintenance unit can be provided for the index information of identification medium segment information in the segmentation of TS code stream, and the advisory of this index is obtained performance element to data; Obtain performance element according to the partitioning information that said index information comprised by data, obtain the frame at the RAP place that need play when special-effect mode or file switch.
Visible in sum; No matter be method or system; The present invention realizes the technology that data are obtained, and client can navigate to the RAP starting and ending position that needs broadcast fast in skip forward/back, when Media Stream switches; Only download corresponding frame and play, and can take over seamlessly play mode such as normal play or time shift; Thereby data downloaded can effectively reduce special-effect mode or file and switch the time, obviously improve the fluency of playing, and can significantly improve user satisfaction.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. method that realizes that data are obtained; It is characterized in that; In the segmentation of transport stream TS code stream, include the index information that is used for the identification medium segment information; This method also comprises: according to the partitioning information that said index information comprised, obtain the frame at the random access point R AP place that need play when special-effect mode or file switch.
2. method according to claim 1 is characterized in that, the method that said index information is set is: in the segmentation of each TS code stream, add one and be used to identify this partitioning information index;
Said index information comprises following indication at least: whether comprise RAP sign or RAP number;
When RAP, said index information further comprises and is used to identify the offset address that each RAP is ordered, and the length that is used to identify each RAP.
3. method according to claim 2 is characterized in that, said index information further comprise following one of at least:
The total length of RAP index information;
The RAP type is used to identify the type of corresponding segmentation RAP;
The RAP timestamp information is used to identify the corresponding reproduction time of each RAP;
Carry the program identification PID of the code stream of RAP.
4. according to each described method of claim 1 to 3, it is characterized in that the process of obtaining the frame at said RAP place according to the partitioning information that said index information comprised comprises:
Download and resolve the partitioning information that index information comprised;
From said partitioning information, parse skew and the length of the RAP that will obtain, and the frame at this RAP place is downloaded in request in view of the above.
One of 5. method according to claim 4 is characterized in that, below said special-effect mode comprises at least:
Skip forward/back, F.F. become a full member normal broadcasts, time shift positioning playing, file switching.
6. a system that realizes that data are obtained is characterized in that, this system comprises that index information maintenance unit, data obtain performance element; Wherein,
Said index information maintenance unit is used for being provided in the segmentation of TS code stream the index information of identification medium segment information, and the advisory of this index is obtained performance element to data;
Said data are obtained performance element, are used for the partitioning information that comprises according to said index information, obtain the frame at the RAP place that need play when special-effect mode or file switch.
7. system according to claim 6 is characterized in that, when said index information maintenance unit is provided with said index information, is used for: add one in the segmentation of each TS code stream and be used to identify this partitioning information index;
Said index information comprises following indication at least: whether comprise RAP sign or RAP number;
When RAP, said index information further comprises and is used to identify the offset address that each RAP is ordered, and the length that is used to identify each RAP.
8. system according to claim 7 is characterized in that, said index information further comprise following one of at least:
The total length of RAP index information;
The RAP type is used to identify the type of corresponding segmentation RAP;
The RAP timestamp information is used to identify the corresponding reproduction time of each RAP;
Carry the PID of the code stream of RAP.
9. according to each described system of claim 6 to 8, it is characterized in that, when said data are obtained performance element and obtained the frame at said RAP place according to the partitioning information that said index information comprised, be used for:
Download and resolve the partitioning information that index information comprised;
From said partitioning information, parse skew and the length of the RAP that will obtain, and the frame at this RAP place is downloaded in request in view of the above.
One of 10. system according to claim 9 is characterized in that, below said special-effect mode comprises at least:
Skip forward/back, F.F. become a full member normal broadcasts, time shift positioning playing, file switching.
CN201110004181.1A 2011-01-10 2011-01-10 A kind of method and system for realizing data acquisition Expired - Fee Related CN102594773B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201110004181.1A CN102594773B (en) 2011-01-10 2011-01-10 A kind of method and system for realizing data acquisition
PCT/CN2012/070198 WO2012094992A1 (en) 2011-01-10 2012-01-10 Method and system for data acquisition

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