CN101483725B - Subtitle rendering random parameter practical regulation method for television subtitle playing device - Google Patents
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- 238000009877 rendering Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000013507 mapping Methods 0.000 claims description 12
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Abstract
This invention refers to the caption broadcasting technology of the producing and broadcasting mechanism of the television program in the broadcasting and TV field, specifically referring to a random parameter practicability adjusting method of TV caption broadcasting device. The method adjusts the random parameter of the caption rendering based on the summarized experience value in the practical work, and maximally guarantees the caption rendering parameter to approach close to the practical application environment, and saves times of traversing static rendering and dynamic specific algorithm via rationally selecting the text information database used in caption rendering, and guarantees the effectiveness of the caption rendering.
Description
Technical field
The present invention relates to the captions broadcast technology of broadcasting and TV field TV programme record and broadcast mechanism, be specifically related to a kind of random parameter practicality method of adjustment of television subtitle playing device.
Background technology
TV subtitling is as a kind of TV programme key element of indispensability, is a kind of form that represents of important teletext.Along with the segmentation of television channel, programme content, the division of labor of each department is also specialized more, for the making of dissimilar programs, has been difficult to meet the demands with the caption system of single type.In addition, improving constantly of the diversity day by day of TV programme and televiewer's appreciation, appreciation level also requires the application model of TV subtitling to develop towards multifarious direction.
In the information age, in the face of being the information that explosivity increases progressively, TV media must be in the shortest time releases the graph text information of magnanimity, and makes every effort to abundanter, more excellent content packaging form, to attract more audient's eyeballs.This just to graph text information issue the basic fundamental implementation tool--film titler is had higher requirement.Develop into gradually from initial explanation video pictures and to represent television image, form important form with impulsive force visual effect.Require the up-to-date computer graphic image technology of caption producing systems incorporate technically; Produce a large amount of static rendering effects and dynamically broadcast special efficacy; And utilization is based on the three-dimensional caption technology in real time of 3-D graphic accelerating engine; The simple function at video generation captions from traditional changes to the comprehensive distribution platform of the video information of " residence is packaged in content ".From the technical standpoint of realizing, the algorithm of the data processing of caption system becomes and becomes increasingly complex, and has used in a large number based on the two dimension of CPU and GPU, the core algorithm that three-dimensional graphics images is handled.
Ensure the situation and the defective of fail safe, real-time and the stability of television subtitle playing device to the method for mainly leaning on manual test at present; The technical staff has proposed a kind of method of the performance guarantee of television subtitle playing apparatus of using based on diversity; This method is used randomizer according to the data structure of captions broadcast system, the simulation actual application environment; Automatic structural map literal curtain object; Use the caption rendering engine then, captions are carried out the multithreading AUTOMATIC STATIC play up with dynamic special efficacy and play up, write down operating position simultaneously system resource; With the defective in the logical design of monitoring caption rendering, ensure fail safe, real-time and the stability of captions broadcast system.
Above-mentioned rendering intent produces according to randomizer fully; In theory, these rending models can travel through all logic branches of static rendering and dynamic special efficacy algorithm to greatest extent, thereby find the defective in the design to greatest extent; But in practical application; The probability that the value of some parameter uses is very little, for example in the TV subtitling commonly used to Chinese character have only about 3000, and the actual characters among TrueType has more than 40000; Again for example, concerning a character, edged, the span that adds the radius of shadow are 0 to 500, concentrate within 0 to 30 and in fact use maximum values.In this case, if fully according to randomizer, the parameter that then obtains is uncontrolled fully, does not have the practical application meaning on the coloring the facts many times of being carried out so in this case.
Summary of the invention
The objective of the invention is to the above-mentioned existing defective of caption rendering mode according to the randomizer generation; A kind of caption rendering parameter actual applied environment of exchange premium more that makes is provided, with the subtitle rendering random parameter practical regulation method of the television subtitle playing device of guaranteeing to play up validity.
Technical scheme of the present invention is following: a kind of subtitle rendering random parameter practical regulation method of television subtitle playing device comprises the steps:
(1) in a parameter range [M, N] is interval, produces a random parameter I;
(2) confirm a threshold value P, and 0＜P＜1, making that the random parameter percentage that in [M, N] scope, produces is that P drops in [S1, S2] this interval, S1 and S2 are two empirical values, and M＜S1＜S2＜N;
(3) interval [M, N] stipulations are arrived [0, (N-M)] interval, at random number K of [0, (N-M)] interval generation,, confirm the mapping algorithm formula then, recomputate the random parameter I that needs according to the scope of K value.
If K within [0, P* (N-M)] interval, is mapped to the K value within the interval [S1, S2] from interval [0, P* (N-M)], the mapping algorithm formula is following:
If K within [P* (N-M), (1+P)/2* (N-M)] interval, is mapped to the K value within the interval [M, S1] from interval [P* (N-M), (1+P)/2* (N-M)], the mapping algorithm formula is following:
If K within [(1+P)/2* (N-M), (N-M)] interval, is mapped to the K value within the interval [S2, N] from interval [(1+P)/2* (N-M), (N-M)], the mapping algorithm formula is following:
The subtitle rendering random parameter practical regulation method of aforesaid television subtitle playing device, this method are set up the database of a Chinese character commonly used, word, sentence, when playing up, travel through all Word messages in this database.This method can use the mode of Windows standard TEXT text to organize these databases.
The subtitle rendering random parameter practical regulation method of aforesaid television subtitle playing device, wherein, this method selects for use the clock TickCount of computer as the seed that produces random parameter.
Further, in the subtitle rendering random parameter practical regulation method of above-mentioned television subtitle playing device, the value of threshold value P is 90%, makes the random parameter that in [M, N] scope, produces have 90% to drop in [S1, S2] this interval.
The present invention revises the caption rendering random parameter according to the empirical value of summing up in the real work, has ensured the caption rendering parameter applied environment of closing to reality more to greatest extent; Employed text message database during through rational selection caption rendering has been saved traversal static rendering and dynamic time of special efficacy algorithm, has guaranteed the validity of caption rendering.
Embodiment
Below in conjunction with specific embodiment the present invention is carried out detailed description.
The render engine of TV subtitling comprises following mode of operation:
The first step enumerates TrueType character libraries all in the system, to every kind of TrueType character library, enumerates all effective characters in this character library.
In second step, enumerate all the manageable figure metaclass in the system.
In the 3rd step, beginning is once played up.
In render process, if current captions type is a character, then:
(1) travels through each TrueType character library;
(2) to each TrueType character library, travel through each significant character in this character library;
(3) to each character, according to preset minimum font size, maximum font size, font size step-length, each font size of circular treatment;
(4) to each font size, according to preset minimum widith, Breadth Maximum, width step-length, each width of circular treatment;
(5) to each width,, generate static rendering parameter at random and dynamically play up parameter according to the randomizer in the caption object render engine;
(6) caption object of creating is with above-mentioned static state, dynamically play up parameter and compose to this caption object;
(7) with this caption object captions project file of organizational form generation according to the captions project file;
(8) render engine of giving broadcast system with this caption object carries out static rendering and dynamically broadcasts;
(9) in render process, note the operating position of CPU, GPU, physical memory, virtual memory;
(10) fault processing.
The misjudgment type: the use of the machine of delaying, CPU, GPU, internal memory surpasses preset threshold value.
It is generally acknowledged that the machine of delaying is the most serious problem,, open the captions project file of original preservation, carry out trace debug if the machine of delaying needs to start the captions manufacturing system.
If the use of CPU, GPU, internal memory surpasses preset threshold value, then need further judge the application of for example using and the record of release, to the subdivision of the triangular plate of GPU etc. to the processing of recursive function, to internal memory.
If current captions type is a pel, so:
(1) every type pel of traversal;
(2) to every kind of pel, according to preset minimum constructive height, maximum height, height step, each height of circular treatment;
(3) to each height, according to preset minimum widith, Breadth Maximum, width step-length, each width of circular treatment;
(4) to each width,, generate static rendering parameter at random and dynamically play up parameter according to the randomizer in the caption object render engine;
(5) caption object of creating is with above-mentioned static state, dynamically play up parameter and compose to this caption object;
(6) with this caption object captions project file of organizational form generation according to the captions project file;
(7) render engine of giving broadcast system with this caption object carries out static rendering and dynamically broadcasts;
(8) in render process, note the operating position of CPU, GPU, physical memory, virtual memory;
(9) fault processing.The same.
In the 4th step, circulation is played up next time.
The present invention makes the parameter that produces automatically more meet actual application through revising random parameter, and main content comprises following three aspects
The first, set up the database (dictionary, dictionary, sentence allusion quotation) of a Chinese character commonly used, word, sentence, can simply use the mode of Windows standard TEXT text to organize these databases.When playing up, not all significant characters in TrueType character library of traversal, but travel through all Word messages in some texts.
The second, because the generation of the randomizer of computer is a pseudo-random number sequence, need before playing up, use the seed of a variable as random number at every turn.No matter use which kind of programming language to realize; A pseudo-random number sequence that all is to use the randomizer of computer to return; This group sequence in fact all is the one group of numerical value that calculates according to recurrence formula, and when the sequence long enough, this group numerical approximation satisfies even the distribution.If but the initial value (being called seed) of calculating pseudo random sequence is identical; The pseudo random sequence of then calculating is exactly identical; So in order to make the randomness of playing up parameter more reasonable at every turn; Thereby more cover the programmed logic branch of render engine, need before playing up, use the seed of a variable at every turn as random number.Specify the method for random number seed a lot, computed clock is the most simple and effective.
Therefore, in the rending model of reality, we have used the clock TickCount of computer.
DWORD?dwTickCount＝GetCurrentSystemTickCount()；
srand(dwTickCount)；
The 3rd, to most parameter range, confirm an empirical value, the value that randomizer is produced drops on more than 90% within this empirical value.Specific algorithm is following:
Suppose that 1: one parameter range is [M, N].
Suppose 2: when reality was used, the effective value of this parameter all dropped in [S1, S2] this interval, and M＜S1＜S2＜N, S1 and S2 are two empirical values.
Suppose 3: transform the randomizer model, make that the random number percentage that in [M, N] scope, produces is that P drops in [S1, S2] this interval.P is a threshold value, and in actual use, we generally use 90%.
Randomizer model based on above hypothesis is following:
The first step to [0, (N-M)] interval, produces a random number K in [0, (N-M)] interval with interval [M, N] stipulations then;
Second step, according to the scope of K value, confirm the mapping algorithm formula, recomputate the random parameter that needs.
If K within [0, P* (N-M)] interval, is mapped to the K value within the interval [S1, S2] from interval [0, P* (N-M)], the mapping algorithm formula is following:
If K within [P* (N-M), (1+P)/2* (N-M)] interval, is mapped to the K value within the interval [M, S1] from interval [P* (N-M), (1+P)/2* (N-M)], the mapping algorithm formula is following:
If K within [(1+P)/2* (N-M), (N-M)] interval, is mapped to the K value within the interval [S2, N] from interval [(1+P)/2* (N-M), (N-M)], the mapping algorithm formula is following:
The I that obtains after the calculating is exactly the random number that we need at last.
Through of the adjustment of above-mentioned three kinds of aspects to the automatic generation model of parameter, just ensured the caption rendering parameter applied environment of closing to reality more to greatest extent, guaranteed the validity of this mode.
Method of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other execution mode, belongs to technological innovation scope of the present invention equally.
Claims (5)
1. the subtitle rendering random parameter practical regulation method of a television subtitle playing device comprises the steps:
(1) in a parameter range [M, N] is interval, produces a random parameter I;
(2) confirm a threshold value P, and 0＜P＜1, making that the random parameter percentage that in [M, N] scope, produces is that P drops in [S1, S2] this interval, S1 and S2 are two empirical values, and M＜S1＜S2＜N;
(3) interval [M, N] stipulations are arrived [0, (N-M)] interval, at random number K of [0, (N-M)] interval generation,, confirm the mapping algorithm formula then, recomputate the random parameter I that needs according to the scope of K value;
When K within [0, P* (N-M)] interval, the K value is mapped within the interval [S1, S2] from interval [0, P* (N-M)], the mapping algorithm formula is following:
When K within [P* (N-M), (1+P)/2* (N-M)] interval, the K value is mapped within the interval [M, S1] from interval [P* (N-M), (1+P)/2* (N-M)], the mapping algorithm formula is following:
When K within [(1+P)/2* (N-M), (N-M)] interval, the K value is mapped within the interval [S2, N] from interval [(1+P)/2* (N-M), (N-M)], the mapping algorithm formula is following:
2. the subtitle rendering random parameter practical regulation method of television subtitle playing device as claimed in claim 1; It is characterized in that: this method is set up the database of a Chinese character commonly used, word, sentence; When playing up, travel through all Word messages in this database.
3. the subtitle rendering random parameter practical regulation method of television subtitle playing device as claimed in claim 2 is characterized in that: this method uses the mode of Windows standard TEXT text to organize described database.
4. the subtitle rendering random parameter practical regulation method of television subtitle playing device as claimed in claim 1 is characterized in that: this method selects for use the clock TickCount of computer as the seed that produces random parameter.
5. the subtitle rendering random parameter practical regulation method of television subtitle playing device as claimed in claim 1; It is characterized in that: the value of threshold value P is 90%; Make the random parameter that in [M, N] scope, produces have 90% to drop in [S1, S2] this interval.
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| CN1567291A (en) * | 2003-07-01 | 2005-01-19 | 刘宝勇 | Method of popular network video production service |
| CN101076077A (en) * | 2007-06-18 | 2007-11-21 | 中兴通讯股份有限公司 | Method, system and network for realizing scroll caption on IPTV set top box |
| CN101098412A (en) * | 2006-06-29 | 2008-01-02 | Lg电子株式会社 | Broadcast receiver and method for performing closed caption |
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| CN1567291A (en) * | 2003-07-01 | 2005-01-19 | 刘宝勇 | Method of popular network video production service |
| CN101098412A (en) * | 2006-06-29 | 2008-01-02 | Lg电子株式会社 | Broadcast receiver and method for performing closed caption |
| CN101076077A (en) * | 2007-06-18 | 2007-11-21 | 中兴通讯股份有限公司 | Method, system and network for realizing scroll caption on IPTV set top box |
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