CN1505396A - Automatic arranging method of quasi-VOD frontend program - Google Patents
Automatic arranging method of quasi-VOD frontend program Download PDFInfo
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- CN1505396A CN1505396A CNA021491879A CN02149187A CN1505396A CN 1505396 A CN1505396 A CN 1505396A CN A021491879 A CNA021491879 A CN A021491879A CN 02149187 A CN02149187 A CN 02149187A CN 1505396 A CN1505396 A CN 1505396A
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Abstract
The invention is a method for automatic editing the video ordering front program; it calculates the occupied channels of video program, and edits the TV program in the provided channel automatically. The method can forms the service according to DVB standard with automatic editing program mode, and extracts correspondent information as single output file; the invention can edit program in the provided channel; it includes: it can calculates the channels amount in the provided time period and the intervals; or, provides time period and channels amount, it can calculate the time interval of channels automatically; at the same time, it can search the needed channel in current channels resources.
Description
Technical field:
The present invention relates to the method for a kind of quasi-video request program (Near Video On Demand is called for short NVOD) front end program automatic editing, be meant a kind of method that the program automatic editing is optimized and bandwidth detects automatically of the NVOD of realization front end system especially.Belong to the digital television techniques field.
Background technology:
NVOD is one of digital cable TV system value-added service, and existing NVOD technology has: the information one-way transmission, be suitable for existing cable television network, and there is not the number of users restriction, characteristics such as cost is low.Utilize NVOD, digital cable customers can be viewed and admired the digital television program of oneself liking easily neatly in the mode of program request.But digital television program is to broadcast continuously, therefore also exists shortcomings such as real-time difference.If adopt one to broadcast passage and broadcast a TV programme, user's just program request after this TV programme has begun to play, then he need wait until in next one broadcast cycle of this TV programme and could begin to watch.If the time that TV programme takies is very long, the user will wait for considerable time.Obviously, this mode has practical value.
Therefore, the common method that adopts a plurality of passage timesharing to broadcast same TV programme of the playing device of digital TV front-end makes and makes all some broadcasting users can watch the digital television program of their institute's program request as quickly as possible a period.
Referring to Fig. 1, it is that a Digital Television is play the common example that adopts a plurality of passage timesharing to broadcast same TV programme of front end, TV programme P1 broadcasts on passage 1, passage 2 and passage 3 respectively, and wherein, passage 2 is play the zero-time hysteresis of the zero-time of TV programme P1 than passage 1; Equally, the zero-time of passage 3 broadcast TV programme P1 also lags behind than the zero-time of passage 2.Like this, after TV programme P1 begins to broadcast, the user begins program request at any one time, and apparatus of digital television receiving can find the nearest starting point of this TV programme P1 to begin to receive and play, and makes the stand-by period of user's receiving digital television program shorten greatly.
But above-mentioned television program transmission mode needs Digital Television broadcast front end in advance editing saving to be made.And existing production method adopts artificial calculating to need the program sum of layout, each passage to want programmed sum basically at every turn.In inefficiency, this method also exists following shortcoming:
1) at every turn can only the single program of layout, therefore to realize the arrangement of program according to the NVOD principle, must accurate Calculation need total number of programs, each passage of layout to want programmed sum at every turn, also need each passage of manual detection simultaneously whether in same frequency;
2) because program can not surpass the bandwidth upper limit of each frequency in each total bandwidth constantly, therefore necessary close inspection before program broadcasts, if but by manually detecting, will need big workload, and the total bandwidth of program can overflow constantly to be difficult to guarantee each;
3) by the mode of the single program of layout, very difficult extraction meets the programme information of digital television broadcasting (Digital VideoBroadcast is called for short DVB) standard.
Summary of the invention:
Main purpose of the present invention is to provide a kind of method of quasi-video request program front end program automatic editing, it can form the service (service) that meets the DVB standard in the mode of automatic editing program, and extracts respective program information simultaneously as independent output file.
Another object of the present invention is to provide a kind of method of quasi-video request program front end program automatic editing, this method can be programmed efficiently in given port number automatically; Comprise: when the preset time section and the time interval, can calculate required port number automatically; Perhaps, preset time section and port number, the time interval that then can calculate passage automatically; Simultaneously can in existing channel resource, seek needed passage automatically.
Another purpose of the present invention is to provide a kind of method of quasi-video request program front end program automatic editing, and whether by providing the algorithm that bandwidth chahnel detects, detecting the bandwidth that each frequency program map takies in the preset time section can overflow.
The object of the present invention is achieved like this:
A kind of method of quasi-video request program front end program automatic editing, to the calculating of program active channel number,
The automatic editing of above-mentioned TV programme comprises following step at least:
Step 11: calculate the shared port number of program according to following formula:
nUsedChan＝nLength/nInterval；
Remainder＝nLength?％?nInterval；
If nRemainder is greater than nInterval/2, nUsedChan=nUsedChan+1 then;
Wherein:
NUsedChan is the shared port number of program;
NLength is the reproduction time length of program own;
NInterval is the Pgmtime interval;
NRemainder is the remainder of program length divided by the time interval;
Step 12: the following formula of foundation calculates the number of programs in each passage:
nProgrameNum＝(T2-T1)/nLength；
Wherein:
NProgrameNum is the number of programs in each passage;
NLength is the reproduction time length of program own;
T1 is a program start time;
T2 is a program end time;
Step 13: the search channel resource begins at program whether nUsedChan the passage that the logic index is continuous is arranged in program end time; If have, then obtain first available logical channel execution in step 14 then, otherwise finish;
Step 14: programmed.
Above-mentioned steps 14 programmed concrete steps are: from first available logical channel, and according to the number of programs of each passage, the record of the program of specific time started of layout; Finish up to the equal layout of the shared passage of all programs.
Above-mentioned method also further comprises the program bandwidth collision detection, is used for detecting automatically the interior shared bandwidth of TV programme of each frequency in section preset time.The shared bandwidth of TV programme in interior each frequency.
Described program bandwidth collision detection is specially:
Step 21: the maximum bandwidth of setting a certain frequency;
Step 22: all programs of a certain passage section preset time, search other passage programs that comprise this program start time one by one, and should the bandwidth of all programs add up under the time started;
Step 23: greater than given maximum bandwidth, it is conflict situation that program then is set as if the bandwidth that adds up; Otherwise program is set is conflict situation not;
Step 24: if do not searched then execution in step 22 of all programs;
Step 25:, then find a passage of not looking in addition, execution in step 22 if do not searched all passages;
Step 26: finish the detection of all programs, the state of update displayed program.
The method of quasi-video request program front end program automatic editing provided by the invention can be in the mode of automatic editing program, and formation meets the service (service) of DVB standard, and extracts respective program information simultaneously as independent output file; This method can be programmed efficiently in given port number automatically; Comprise: when the preset time section and the time interval, can calculate required port number automatically; Perhaps, preset time section and port number, the time interval that then can calculate passage automatically; Simultaneously can in existing channel resource, seek needed passage automatically.The present invention is also by providing the algorithm that bandwidth chahnel detects, and whether detect the bandwidth that each frequency program map takies in the preset time section can overflow.
Description of drawings:
Fig. 1 plays front end for Digital Television and adopts a plurality of passage timesharing to broadcast the example schematic of same TV programme usually;
The particular flow sheet of Fig. 2 one embodiment of the invention;
Fig. 3 is the flow chart of collision detection among Fig. 2 embodiment of the present invention.
Embodiment:
Referring to Fig. 2, a concrete flow process of NVOD program automatic editing of the present invention comprises following step:
1) all parameter values of initialization;
2) import the time interval, program start time and the program end time that different passage programs begin;
3) calculate the shared port number of program;
nUsedChan＝nLength/nInterval；
Remainde?r＝nLength?％?nInterval；
If nRemainder is greater than nInterval/2, nUsedChan=nUsedChan+1 then;
Wherein:
NUsedChan is the shared port number of program;
NLength is the reproduction time length of program own;
NInterval is the Pgmtime interval;
NRemainder is the remainder of program length divided by the time interval;
4) calculate number of programs in each passage, that is:
nProgrameNum＝(T2-T1)/nLength；
Wherein:
NProgrameNum is the number of programs in each passage;
NLength is the reproduction time length of program own;
T1 is a program start time;
T2 is a program end time;
5) the search channel resource begins at program whether nUsedChan the passage that the logic index is continuous is arranged in program end time; If have, then obtain first available logical channel, otherwise finish;
6) from first available logical channel, according to the number of programs of each passage, the record of the program of specific time started of layout; Finish up to the equal layout of the shared passage of all programs.
Also further comprise the detection that program bandwidth is conflicted in the present invention referring to Fig. 3, be used for automatic detection
Also further comprise the detection that program bandwidth is conflicted in the present invention referring to Fig. 3, be used for detecting automatically the interior shared bandwidth of TV programme of each frequency in section preset time.
Concrete collision detection flow process comprises:
1) initialization is changed to the conflict situation sign of all programs and does not conflict;
2) maximum bandwidth of input frequency and initial, the termination time section that will detect;
3) find out all programs that belong to same frequency in initial, the termination time section that will detect;
4) select a program to detect at the program that finds;
Is 5) this program conflict situation sign a conflict situation? be that then execution in step 10);
6) not, then in removing other program of this program, search that search criterion is the time started that the lasting time period of program comprises detected program;
7) with the shared bandwidth of detected program and the bandwidth sum addition of the program that finds;
8) is addition result greater than maximum bandwidth? not execution in step 10 then);
9) be then the conflict situation sign of detected program and the program that finds to be changed to conflict;
10) if all programs detect to finish, then finish;
11) otherwise, select next detected program, execution in step 5).
Above embodiment is the unrestricted technical scheme involved in the present invention in order to explanation only, although the present invention is had been described in detail with reference to above preferred embodiment, those of ordinary skill in the art should be appreciated that technical scheme of the present invention still can make amendment, is out of shape or is equal to replacement; And do not break away from the spirit and scope of technical solution of the present invention, all should be encompassed among the claim scope of the present invention.
Claims (5)
1, a kind of method of quasi-video request program front end program automatic editing is characterized in that: TV programme active channel number is calculated the TV programme that automatic editing will broadcast in given port number.
2, the method for quasi-video request program front end program automatic editing according to claim 1, it is characterized in that: the automatic editing of TV programme comprises following step at least:
Step 11: calculate the shared port number of TV programme according to following formula:
nUsedChan＝nLength/nInterval；
Remainder＝nLength?％?nInterval；
If nRemainder is greater than nInterval/2, nUsedChan=nUsedChan+1 then;
Wherein:
NUsedChan is the shared port number of program;
NLength is a single-unit order reproduction time length;
NInterval is the Pgmtime interval;
NRemainder is the remainder of program length divided by the time interval;
Step 12: the following formula of foundation calculates the number of programs in each passage:
nProgrameNum＝(T2-T1)/nLength；
Wherein:
NProgrameNum is the number of programs in each passage;
NLength is a single-unit order reproduction time length;
T1 is a program start time;
T2 is a program end time;
Step 13: the search channel resource begins at program whether nUsedChan the passage that the logic index is continuous is arranged in program end time; If have, then obtain execution in step 14 after first available logical channel, otherwise finish;
Step 14: programmed.
3, the method for quasi-video request program front end program automatic editing according to claim 2, it is characterized in that: above-mentioned steps 14 programmed concrete steps are: from first available logical channel, according to the number of programs of each passage, the record of the program of specific time started of layout; Finish up to the equal layout of the shared passage of all programs.
4, the method for quasi-video request program front end program automatic editing according to claim 1, it is characterized in that: it also further comprises the program bandwidth collision detection, is used for detecting automatically the interior shared bandwidth of TV programme of each frequency in section preset time.
5, the method for quasi-video request program front end program automatic editing according to claim 4, it is characterized in that: described program bandwidth collision detection is specially:
Step 21: the maximum bandwidth of setting a certain frequency;
Step 22: all programs of a certain passage section preset time, search other passage programs that comprise this program start time one by one, and should the bandwidth of all programs add up under the time started;
Step 23: greater than given maximum bandwidth, it is conflict situation that program then is set as if the bandwidth that adds up; Otherwise program is set is conflict situation not;
Step 24: if do not searched then execution in step 22 of all programs;
Step 25:, then find a passage of not looking in addition, execution in step 22 if do not searched all passages;
Step 26: finish the detection of all programs, the state of update displayed program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021491879A CN1505396A (en) | 2002-11-28 | 2002-11-28 | Automatic arranging method of quasi-VOD frontend program |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA021491879A CN1505396A (en) | 2002-11-28 | 2002-11-28 | Automatic arranging method of quasi-VOD frontend program |
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| CN1505396A true CN1505396A (en) | 2004-06-16 |
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| CNA021491879A Pending CN1505396A (en) | 2002-11-28 | 2002-11-28 | Automatic arranging method of quasi-VOD frontend program |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465969B (en) * | 2007-12-18 | 2011-12-28 | 新奥特（北京）视频技术有限公司 | Method for real-time regulating and detecting program modification based on event trigger mechanism |
| CN101465968B (en) * | 2007-12-18 | 2012-03-28 | 新奥特（北京）视频技术有限公司 | Method for real-time detecting and prompting program time-interval layout based on event trigger mechanism |
| CN108631853A (en) * | 2017-03-22 | 2018-10-09 | 国家新闻出版广电总局广播电视卫星直播管理中心 | A kind of dynamic adjusts the method and system of satellite resource used in direct broadcast satellite system data service |
-
2002
- 2002-11-28 CN CNA021491879A patent/CN1505396A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465969B (en) * | 2007-12-18 | 2011-12-28 | 新奥特（北京）视频技术有限公司 | Method for real-time regulating and detecting program modification based on event trigger mechanism |
| CN101465968B (en) * | 2007-12-18 | 2012-03-28 | 新奥特（北京）视频技术有限公司 | Method for real-time detecting and prompting program time-interval layout based on event trigger mechanism |
| CN108631853A (en) * | 2017-03-22 | 2018-10-09 | 国家新闻出版广电总局广播电视卫星直播管理中心 | A kind of dynamic adjusts the method and system of satellite resource used in direct broadcast satellite system data service |
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