CN101340570B - Method for realizing redirection when playing stream media - Google Patents
Method for realizing redirection when playing stream media Download PDFInfo
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- CN101340570B CN101340570B CN2008101184401A CN200810118440A CN101340570B CN 101340570 B CN101340570 B CN 101340570B CN 2008101184401 A CN2008101184401 A CN 2008101184401A CN 200810118440 A CN200810118440 A CN 200810118440A CN 101340570 B CN101340570 B CN 101340570B
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- time scale
- transport stream
- streaming media
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Abstract
The invention discloses a method used for realizing jumping when the stream media is being played, which is applicable to MPEG-2 transmission stream format files, comprising: establishing a mapping table between memory time graduation and TS stream data package number where I frame most adjacent to the time graduation exists in the MPEG-2 transmission stream format file, loading the mapping table when the stream media server is started; sending a jumping request containing time graduation to the stream media server by a set top box; searching corresponding TS stream data package number by the stream media according to the time graduation and positioning the subsequently sent TS stream data package as the TS stream data package; sending the stream media sever by starting from the TS stream data package. The technical proposal of the invention can lead the stream media server to use less space cost, realize more precise positioning, thus realizing the jumping function of the MPEG-2 transmission stream.
Description
Technical field
The present invention relates to the digital television techniques field, realize the method for redirect when relating in particular to a kind of streaming media playing.
Background technology
MPEG-2 be 1994 by Motion Picture Experts Group (Moving Pictures Exports Group, MPEG) video of Tui Chuing and sound accompaniment compression standard thereof.Moving Picture Experts Group-2 is applicable to Standard Digital Television and the needed coded system of digital TV in high resolution, and its encoding rate is from per second 3M bit～100M bit.MPEG-2 is specially adapted to the digital tv encoder and the transmission of broadcast level, is considered to the coding standard of SD Digital Television and digital TV in high resolution.On DVD, top box of digital machine and Digital Television, extensively adopted the MPEG-2 decoder at present.
Moving Picture Experts Group-2 is in order to synthesize single or multiple data flow with one or more audio frequency, video or other elementary stream, and adaptation storage and transmission, just need pack to the encapsulation that code stream carries out again, insert information such as required various time marks, system's control simultaneously, deliver to chnnel coding and modulator at last.So just can generate two kinds of data flow that are applicable to different application respectively---transport stream (TransportStream) and program flow (Program Stream).
Transport stream is called for short TS stream, and its purpose is in order to carry out the transmission and the storage of one or more coded data under the situation that gross error might take place.Wherein contingent mistake mainly shows the mistake of bit value or losing of grouping.Transport stream is made up of one or more program, and the per pass program is combined with each other by one or more primary flows and some other streams, comprises video flowing, audio stream, program streams of information etc.The application of transport stream is very extensive, as the nonlinear editing system of the preservation of audio frequency and video, TV programme and network or the like.
The function of streaming media server is according to the precedence transmission of time and plays the continuant video data stream, makes the user need not complete download audio-video document and can watch or listen to continuous high-quality image and sound program in this locality.Therefore, stream medium data has three characteristics: continuity, real-time and sequential.Streaming media server is widely used in video request program (VOD), video broadcasting, video monitoring, video conference, fields such as remote teaching.
Need certain synchronization mechanism can realize the broadcast of continous-stable between streaming media server and the set-top box, the streaming media server end is by the transmission rate of control transmission stream, make set-top box obtain stable transport stream, thereby guarantee the quality of broadcast, therefore the streaming media server end needs a synchronized clock system, be used for writing down transmitting time, calculate transmission rate.
But the mpeg 2 transport stream that extensively adopts in the digital TV field can not be finished redirect when video broadcasting and video request program, therefore need address this problem as early as possible.
Summary of the invention
Realize the method for redirect when the objective of the invention is to propose a kind of streaming media playing, realize quick turn function in the time of can in digital TV field, carrying out video broadcasting and video request program.
For reaching this purpose, the present invention by the following technical solutions:
Realize the method for redirect during a kind of streaming media playing, be applicable to the mpeg 2 transport stream formatted file, may further comprise the steps:
Mapping table in A, settling time scale and the described mpeg 2 transport stream formatted file between the mpeg 2 transport stream packet Bale No. of the place of adjacent nearest I frame with described time scale, described mapping table also comprises the lock in time of each described mpeg 2 transport stream packet, the lock in time of described mpeg 2 transport stream packet is corresponding with described mpeg 2 transport stream packet Bale No., and stores described mapping table;
When B, streaming media server startup, load described mapping table;
C, set-top box send the jump request that comprises time scale to described streaming media server;
D, described streaming media server are searched described mapping table according to the time scale in the described jump request;
E, retrieve the mpeg 2 transport stream packet Bale No. of the time scale correspondence in the described jump request, the mpeg 2 transport stream packet that the next one is sent is orientated the mpeg 2 transport stream packet of the mpeg 2 transport stream packet Bale No. correspondence of the time scale correspondence in the described jump request as;
F, described streaming media server will begin to send the mpeg 2 transport stream packet of mpeg 2 transport stream packet Bale No. correspondence of the time scale correspondence in the described jump request and later mpeg 2 transport stream packet from the mpeg 2 transport stream packet of the mpeg 2 transport stream packet Bale No. correspondence of the time scale correspondence the described jump request to described set-top box.
In the steps A, described time scale is integer second, differs 1 second between the adjacent described time scale.
Step C further may further comprise the steps:
Described set-top box is obtained the time scale that need jump to;
The time scale that described needs are jumped to is adjusted into the integer time scale;
The jump request that will comprise described integer time scale sends to described streaming media server.
The time scale that described needs are jumped to is adjusted into the integer time scale, partly finishes by the non-integer that removes the time scale that described needs jump to, and perhaps finishes according to the mode that rounds up.
Step e is further comprising the steps of:
The lock in time that is set to described mpeg 2 transport stream packet lock in time of the current broadcast of described streaming media server.
Adopted technical scheme of the present invention, can allow streaming media server use littler space cost, faster speed realizes accurate localization more, thereby realizes the turn function of mpeg 2 transport stream.
Description of drawings
Fig. 1 is a flow chart of realizing redirect in the specific embodiment of the invention during streaming media playing.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Fig. 1 is a flow chart of realizing redirect in the specific embodiment of the invention during streaming media playing.As shown in Figure 1, the flow process that realizes redirect during streaming media playing may further comprise the steps:
Step 101, on streaming media server, set up, mapping table of storage, this mapping table comprises the MPEG-2TS stream packets Bale No. at adjacent nearest I frame place with this time scale in time scale, the MPEG-2TS stream file to be played and the lock in time of this MPEG-2TS stream packets.
This time scale can be integer second, differs 1 second between two adjacent time scales.Because time scale is integer second, the corresponding naturally integer of the line number of mapping table second is so the also information of holding time scale not in this mapping table is to reduce the size of this mapping table, only relevant with the length of program.
This mapping table also can increase other content according to concrete needs.
When step 102, streaming media server startup, be written into corresponding mapping table, because it is this mapping table is very little, also very low to the load of server.
Step 103, user be by such as different modes such as towing mouse, remote controller inputs, send to set-top box and when need jump to scale, such as 30 minutes 42 seconds 13 milliseconds.
But because streaming media server can only be accepted precision is the integer time scale of second, therefore set-top box can be adjusted into integer time scale second with the time scale that jumps to that receives, can partly finish by removing the non-integer that need jump to time scale, also can finish according to the mode that rounds up, such as 30 minutes 42 seconds 13 milliseconds be adjusted into 30 minutes 42 seconds, set-top box sends the jump request comprise this integer time scale second to streaming media server more then.
Step 104, streaming media server remove to search mapping table according to integer time scale second that comprises in this jump request.
Step 105, from this mapping table, find out the TS stream packets Bale No. corresponding, orientate the next one as this corresponding TS stream packets to the TS stream packets that set-top box sends with this integer time scale second.
Be set to the lock in time of this TS stream packets correspondence the lock in time of step 106, the current broadcast of streaming media server.
Step 107, streaming media server send this TS stream packets and later TS stream packets thereof to set-top box.
By making the mapping table file, can accurate localization to the pairing nearest I frame position of redirect time scale (be accurate to second), the precise time scale of I frame might not, be difficult to just in time this integer time scale second of correspondence in other words, therefore this redirect time scale and real redirect and the time scale that begins to play are that certain error is arranged, and this error is the difference of the time scale and the redirect time scale of I frame.General MPEG-2TS stream on average has the I frame about two in each second, specifically having several still is to be determined by encoder.If two I frames were arranged in each second, so average worst error is exactly 0.5 second, for user's consideration visually, is difficult to identify so little time error.
Because first TS packet that sends after the redirect and the redirect time scale of inaccuracy respective user appointment, streaming media server just need obtain the precise synchronization time of current TS bag when sending new data.Under should preserving lock in time in the mapping table file, streaming media server can obtain lock in time accurately by directly reading, and has avoided the reckoning that repeats after each redirect, has improved efficient and precision.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (5)
1. realize the method for redirect during a streaming media playing, be applicable to the mpeg 2 transport stream formatted file, it is characterized in that, may further comprise the steps:
Mapping table in A, settling time scale and the described mpeg 2 transport stream formatted file between the mpeg 2 transport stream packet Bale No. of the place of adjacent nearest I frame with described time scale, described mapping table also comprises the lock in time of each described mpeg 2 transport stream packet, the lock in time of described mpeg 2 transport stream packet is corresponding with described mpeg 2 transport stream packet Bale No., and stores described mapping table;
When B, streaming media server startup, load described mapping table;
C, set-top box send the jump request that comprises time scale to described streaming media server;
D, described streaming media server are searched described mapping table according to the time scale in the described jump request;
E, retrieve the mpeg 2 transport stream packet Bale No. of the time scale correspondence in the described jump request, the mpeg 2 transport stream packet that the next one is sent is orientated the mpeg 2 transport stream packet of the mpeg 2 transport stream packet Bale No. correspondence of the time scale correspondence in the described jump request as;
F, described streaming media server will begin to send the mpeg 2 transport stream packet of mpeg 2 transport stream packet Bale No. correspondence of the time scale correspondence in the described jump request and later mpeg 2 transport stream packet from the mpeg 2 transport stream packet of the mpeg 2 transport stream packet Bale No. correspondence of the time scale correspondence the described jump request to described set-top box.
2. realize the method for redirect during a kind of streaming media playing according to claim 1, it is characterized in that in the steps A, described time scale is integer second, differs 1 second between the adjacent described time scale.
3. realize the method for redirect during a kind of streaming media playing according to claim 1, it is characterized in that step C further may further comprise the steps:
Described set-top box is obtained the time scale that need jump to;
The time scale that described needs are jumped to is adjusted into the integer time scale;
The jump request that will comprise described integer time scale sends to described streaming media server.
4. realize the method for redirect during a kind of streaming media playing according to claim 3, it is characterized in that, the time scale that described needs are jumped to is adjusted into the integer time scale, partly finish by the non-integer that removes the time scale that described needs jump to, perhaps finish according to the mode that rounds up.
5. realize the method for redirect during a kind of streaming media playing according to claim 1, it is characterized in that step e is further comprising the steps of:
The lock in time that is set to described mpeg 2 transport stream packet lock in time of the current broadcast of described streaming media server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101184401A CN101340570B (en) | 2008-08-22 | 2008-08-22 | Method for realizing redirection when playing stream media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101184401A CN101340570B (en) | 2008-08-22 | 2008-08-22 | Method for realizing redirection when playing stream media |
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| Publication Number | Publication Date |
|---|---|
| CN101340570A CN101340570A (en) | 2009-01-07 |
| CN101340570B true CN101340570B (en) | 2010-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101184401A Expired - Fee Related CN101340570B (en) | 2008-08-22 | 2008-08-22 | Method for realizing redirection when playing stream media |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098571B (en) * | 2009-12-14 | 2013-06-19 | 中国电信股份有限公司 | Method and system for dynamically pushing data |
| CN102137140A (en) * | 2010-10-08 | 2011-07-27 | 华为软件技术有限公司 | Method, device and system for processing streaming services |
| CN103873891B (en) * | 2014-03-20 | 2017-02-22 | 深圳创维－Rgb电子有限公司 | TS streaming media file fast positioning method and system |
| CN109547816A (en) * | 2018-12-07 | 2019-03-29 | 视联动力信息技术股份有限公司 | A kind of VOD method and device based on view networking |
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| CN101340570A (en) | 2009-01-07 |
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Owner name: BEIJING HUIXINBOSI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: TEMBEC BROADBAND NETWORK TECHNOLOGY ( BEIJING ) CO., LTD. Effective date: 20090807 |
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Effective date of registration: 20090807 Address after: A, 31 floor, block 2, digital building, No. 100086 South Avenue, Beijing, Haidian District: Zhongguancun Applicant after: Beijing Husen Technology Co., Ltd. Address before: A, 19 floor, block 2, digital building, No. 100086 South Avenue, Beijing, Haidian District: Zhongguancun Applicant before: Digital Video Networks (Beijing) Co., Ltd. |
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Owner name: TIANDI HUAWEN (BEIJING) TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING HUSEN TECHNOLOGY CO., LTD. Effective date: 20130422 |
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Effective date of registration: 20130422 Address after: 100086 room 689, building 1, zone 5, 1201-12101215 South Main Street, Beijing, Haidian District, Zhongguancun Patentee after: Tiandi Chinese (Beijing) science and Technology Co., Ltd. Address before: 100086, 31 floor, block A, digital building, No. 2 South Avenue, Beijing, Haidian District, Zhongguancun Patentee before: Beijing Husen Technology Co., Ltd. |
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