CN100364322C - Method for dynamically forming caption image data and caption data flow - Google Patents
Method for dynamically forming caption image data and caption data flow Download PDFInfo
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- CN100364322C CN100364322C CNB2005100221611A CN200510022161A CN100364322C CN 100364322 C CN100364322 C CN 100364322C CN B2005100221611 A CNB2005100221611 A CN B2005100221611A CN 200510022161 A CN200510022161 A CN 200510022161A CN 100364322 C CN100364322 C CN 100364322C
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Abstract
The present invention discloses a method for dynamically forming caption image data and caption data flows, which comprises the following steps: (a), a description record of a caption user is accessed for obtaining source data; (b), the analysis of caption attributes is carried out for the source data of the description record of the caption user obtained in the step (a) for obtaining a rule or an editing appointment for generating caption data; (c), a graphic device in a computer is applied in order to automatically draw and generate caption images by the rule or the editing appointment obtained in the step (b) through calculation for obtaining the image data of each frame picture of captions, and single-frame images are connected to form an image data sequence of one caption; (d), the caption image data of the step (c) is encoded and encapsulated into a data flow which conforms to a digital caption standard. The method for dynamically forming caption image data and caption data flows of the present invention can enrich the revealing form of digital captions and can enhance flexibility, diversity and self control performance of data generation, broadcast and transmission. Moreover, manual operation does not needed in the producing process of caption data flows.
Description
Technical field
The present invention relates to the data, services in the digital caption front end system of digital TV field, concrete, the present invention relates to the dynamic generation captions view data in the digital caption front end system of digital TV field and the method for subtitle data stream.
Background technology
At digital TV field, digital caption is a kind of service application of generally carrying out on terminal presentation facilities such as TV.What the digital caption technology generally adopted at present is Digital VideoBroadcasting (DVB) Subtitling System standard (DVB Subtitle), this captions standard code terminal equipment carry out method and the processing procedure that caption data receives, resolves, shows, defined the requirement that subtitle data stream should satisfy.But how this standard not regulation front end system that produces these subtitle data streams produces the data flow that satisfies the captions standard and have multiple captions form, method, scheme that therefore various captions front end systems generate subtitle data stream have nothing in common with each other, the degree of enriching of caption content is all different with the captions form that can show in the data flow that produces, the comfort level of user's operation is also inequality, thereby systemic-function is strong and weak different.Satisfying under the identical terminal data normal conditions, the caption system that has can show the captions of multiple form, style, has only simpler, single captions business in the data that the system that has provides.Dynamic title data flow generative process and method are important in a digital caption front end system parts, and it relates to the editor of digital caption data in front end system, produces and broadcast control.The generation method of subtitle data stream and procedure relation to digital caption terminal represent form and diversity, be related to the application and the popularization of digital caption system.
Summary of the invention
The purpose of this invention is to provide a kind of digital caption that enriches and represent form, improve flexibility, diversity and autocontrol performance that data generate, broadcast, and the subtitle data stream production process does not need the manually-operated method of utilizing computer program dynamically to generate captions view data and subtitle data stream.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses the method for a kind of dynamic generation captions view data and subtitle data stream, described method comprises the steps:
(a) visit captions user describes record, obtains source data;
(b) source data that the captions user who obtains in the step (a) is described record is carried out the parsing of captions attribute, and figure/iconology technology to drawing captions image required rule or layout agreement obtain using a computer;
(c) rule or the layout agreement of utilizing step (b) to obtain, adopt software to generate the method for image, by calling the GDI in the computer system, automatically draw every frame captions image by graphic package, and obtaining the view data of every frame captions image, each two field picture gets up to constitute the image data sequence of captions continuously;
(d) the captions view data process of step (c) is encoded, and be packaged into the data flow that meets the digital caption standard.
The visit of in the described step (a) the captions user being described record is to realize that by the routine interface of storage data described routine interface comprises self-defining file interface or GDI.
The trigger condition that described visit captions user describes record comprises that caption system finds that the data of describing the captions business have renewal or variation, perhaps have professional arrival to broadcast the time in the captions business of layout.
Captions attribute in the described step (b) comprises the agreement and the rule of the captions picture of generation, and described captions picture comprises caption area size, alphabetic character, back gauge, font, motion mode, background decorative pattern, color, broadcasts the time, broadcasts pass.
Every frame captions picture image that will satisfy the captions requirement in the described step (c) is created in internal memory or other memory device.Every frame image data is an intermediate data, and buffer memory is interim, is ceaselessly substituting, is changing.In this step, the generation of captions image depends on the graphics device in the caption system server, and as the font of installing in the machine, the color of support, these are fonts available for character selection or the colors that are applied to captions.
Content in described every frame captions picture image and character position are to calculate by program to obtain and the location.
Coding captions view data is meant in the described step (d), with the single-frame images data that generate in the step (c), according in DVB Subtitle (the Digital Video Broadcasting Subtitling System) standard coding requirement of captions image being encoded.
Encapsulation is meant in the described step (d), uses the notion encapsulation caption data in the DVB Subtitle captions standard.
Owing to adopted above scheme, beneficial effect that the present invention possesses comprise following some:
1, caption data generates flexibly
Because the technical program adopts computer program to resolve captions attribute description record and obtains knowledge and rule, utilizes these knowledge to carry out the processing and the generation of captions image frame again.By the property parameters that the user describes, the generative process of every two field picture is very easy to control in the captions, and rule or agreement that program can be resolved can both be applied in the generation of captions view data.Just because of these characteristics, the captions that utilize method of the present invention to realize can present multiple style and pattern.
2, caption data generates accurately
Method of the present invention is calculated accurately by the attributes such as part of design object algorithm to the character position on every frame captions, drafting quantity, drafting, and passes through the technology to drawing of computer graphical/iconology, expresses every frame captions image frame exactly.And the captions picture of drawing by other image processing software does not reach this precision substantially, and is difficult to generate this continuous images sequence.The captions image sequence that adopts method of the present invention to generate can be expressed a captions business very exactly.Accuracy also is the characteristics of computer program work.
3, caption data generates and possesses diversity
Because it is flexible that method of the present invention generates the mode of data, and by the description of program parsing user to the numerous attributes of captions, so it can realize the captions of very multiple class style or pattern.The captions of for example various motion modes, various decorative pattern background and frame, and realize easily.
4, subtitle data stream generates and possesses automaticity
Because method whole process using computer program of the present invention carries out the study and the expression of knowledge, rule, Automatic Program is carried out the generation of captions image frame and digital coding, encapsulation, packing, whole workflow all can be carried out according to user prior layout and planning and designing, subtitle data stream produces automatically, do not need manual operation, and very punctual, accurately.
Description of drawings
Fig. 1 is the main flow chart that program generates caption data in the method for the present invention.
Fig. 2 utilizes method of the present invention to generate the captions picture diagram of different fonts.
Fig. 3 is that the captions picture that utilizes method of the present invention to generate to left movement illustrates.
Fig. 4 is a captions picture diagram of utilizing method generation of the present invention to move upward.
Fig. 5 is a captions picture diagram of utilizing method generation of the present invention to move downward.
Fig. 6 utilizes method of the present invention to generate the captions picture diagram of demonstration frame by frame.
Embodiment
The digital caption front end system generally runs in the server of digital-TV operator, and the generation of subtitle data stream is the important component part in the digital caption system.Therefore the DVB Subtitle digital caption front end system software platform that can move can be the server platform of using always, is the server of operating system such as WINDOWS or LINUX.
In the specific embodiment of the present invention, selecting the DVB Subtitle caption system with numeral Shenzhen company of Skyworth is example, and its hardware environment requires as follows:
Hardware platform: general computer server or PC, but the driving of display device must be installed;
Software platform: WINDOWS 2000 or above version, the DVB Subtitle of Skyworth caption system.
The realization of digital caption data flow generation technique will depend on sets up DVB Subtitle captions front-end service system, uses this technology and generate subtitle data stream in this front end service system software.The technology that application program dynamically generates captions picture and data flow in the digital caption front end system is formed and to be comprised the following steps: that mainly the captions user describes the visit of record, the parsing of captions attribute, the generation of captions image, digital coding and broadcast etc.
1. the captions user describes the visit of record
The captions user describes record and mainly is meant data record by the captions attribute data of caption editing system layout, and it is the description of user to required captions form, form, is the source data that produces caption stream.Therefore the description record that obtains captions is the prerequisite that generates the captions picture data.The captions user describes record and generally is stored in database or the file system by certain rule, and the visit that the captions user describes record is exactly to obtain these data item by certain interface routine to resolve for follow-up program.
2. the parsing of captions attribute
The required subtitling format of user is hidden in the captions data of description record, therefore needs a program module resolve the source data record that these describe captions, the rule of agreement when program needs layout, record to the parsing of source data.Obtain knowledge or the rule that generates the captions view data by the parsing of captions attribute, program just can calculate the data of the every two field picture of captions by these knowledge and rule.So understanding process of preceding knowledge of the resolving of captions attribute data record captions picture image generation just and rule, the knowledge learning and the regular inverting in this stage have been arranged, the captions image that captions image generation module subsequently just can utilize these knowledge and rule to generate to meet the demands.
3. the generation of captions image
The generation of captions image is the sport technique segment of most critical in the method for the present invention, knowledge and rule that it obtains according to the parsing of last stage captions attribute, Application Software Program generates the method for image, call the GDI in the computer, the frame picture image that satisfies the captions requirement is created in internal memory or other memory device, for the coding use of next stage caption data.Every frame image data is an intermediate data, and buffer memory is interim, is ceaselessly substituting, is changing.The caption frame picture image generates with coding, the encapsulation of next stage and can carry out simultaneously.
The generation of captions picture image need be used the captions property parameters that parses in the last stage, as size, motion mode, background decorative pattern, movement velocity etc., by these parameter control, program is calculated the captions image that generates every frame, and single-frame images gets up continuously and just constituted the image data sequence of captions.Detailed process simple example: at first calculate the picture frame that generates present frame according to dimensional parameters, whether according to whether the decision of needs background colour or background image is added current frame image and is gone up background colour or background image, use certain algorithm computation then and go out every frame captions characters in images, the position that character judge and character occur, call the GDI in the computer again, select for use suitable font with rendering character strings in image allocation really, grasp the view data of drawing in the graphics device in the computer again, just can give the coding module coding and export, go round and begin again like this and just can obtain continuous captions image data sequence.
In captions view data generative process, many links algorithm of need designing program, and these algorithms must possess excellent precision and accuracy.For example, when the captions character that the every two field picture of calculating should show, the character in two frames of front and back has only the difference of several pixels usually, and a part wherein only drawn in the character in the frame, several frames get up continuously and just constitute complete character, and these all depend on accurate algorithm and just can finish.
Subtitle data encoding, encapsulate and broadcast
Subtitle data encoding and broadcasting exactly with the single-frame images data that generate previously according in the DVBSubtitle standard coding requirement of captions image being encoded, has a detailed description in the specific coding method standard.The data block that image encoding forms is used for the encapsulation of caption data.
The notion that data encapsulation is used in the DVB Subtitle captions standard encapsulates caption data, and data mainly contain page composition data, the district forms data, color composition data, object composition data and end data piece.In the moment that certain plan is broadcast, after the captions image generates,, be packaged into the caption object data again through coding, to broadcast by the Broadcast Control program and finish output, data flow is passed through multiplexing and TV data transmission network incoming terminal user again.
The Broadcast Control of subtitle data stream realizes and mechanism is not the emphasis that method of the present invention is paid close attention to, and special technical solution is arranged.
Use method of the present invention and carry out the generation of caption data, can generate the captions pattern of various styles with comparalive ease, greatly enriched the content of captions, make it can carry out multiple value-added service and use, as showing TV station logo, roll titles, television reminding information, tv animation, the advertisement of TV corner etc.These application help applying of Digital Television captions business.But these application all depend on the subtitle data stream generation technique, and it has prepared the data basis for the service application of these user levels.
Enumerated partly the diagram of the caption data that generates by method of the present invention below:
1) captions of multiple fonts
As shown in Figure 2, the captions of captions image shows are to use the caption frame image that regular script, the Song typeface, the tablet of Wei Dynasty, row pattern, black matrix and the traditional Chinese generate successively.Be provided with the back gauge that background image and character are drawn in this section captions.In fact, when using method of the present invention, so long as the font of installing on the subtitle server, all can generate the captions of corresponding font characters.
2) to the captions of left movement
As shown in Figure 3, these captions diagrams has been showed at every turn the roll distance of several pixels of one section diagram that captions roll to the left from the TV right side, subtitle strings left.Wherein, the first six frame display be the situation that this captions new round begins to roll, back six frame display be the fast situations about finishing of captions.Be provided with the back gauge that background image and character are drawn in this section captions.
3) captions that move upward
As shown in Figure 4, these captions diagram has been showed one section diagram that captions scroll up from the TV downside.Be provided with the back gauge that background image and character are drawn in this section captions.
4) captions that move downward
As shown in Figure 5, these captions diagram has been showed one section diagram that captions roll from top to bottom from TV.For the ease of watching, it has changed the way of direct roll titles character string position, so more helps the user and sees clearly.Be provided with the back gauge that background image and character are drawn in this section captions.
5) captions that show frame by frame
As shown in Figure 6, these captions diagram has been showed one section diagram that captions show frame by frame, and it resembles the spolen title in the film, and the user can be provided with character quantity, display line data and frame period in every frame captions.Be provided with the back gauge that background image and character are drawn in this section captions.
Comprehensive, the method of dynamic generation captions view data of the present invention and subtitle data stream is to adopt computer program to resolve the captions business and the captions attribute characteristics of prior layout, as forms of motion, pattern, the temporal regularity that occurs, font, background decorative pattern or the like, use specific algorithm, by the figure in the computer, vision facilities, as display card or video memory, automatically draw a frame two field picture picture that generates the formation captions in the moment program that certain captions need be broadcast according to the method for graphics, generate the subtitle data stream that meets DVB Subtitle standard by the coding packing subsequently and broadcast.There are following characteristics in the digital caption system that uses method generation of the present invention:
Can be in advance according to attributes of a configuration such as the content of user's demands of applications layout captions, motion mode, background, frames, realize from user perspective layout captions business;
The user can arrange or plan the time that each captions business is broadcast and broadcast rule, or else needs manual intervention subsequently;
The multiple forms of motion of captions and the pattern of captions can be provided, as static, show from left to right, from right to left, from the top down, from bottom to top, frame by frame, Pagination Display or the like, new motion mode or the style of convenient expansion captions;
The caption data of multiple fonts can be provided,, so long as the font of installing on the subtitle server, all can generate the captions of corresponding font characters as fonts such as the Song typeface, black matrix, regular script, running hands;
Generation, the coding of the animated image picture in the subtitle data stream, packing and broadcasting does not all need manual intervention, and the subtitle data stream of image and character two forms can be provided.
Claims (8)
1. a method that dynamically generates captions view data and subtitle data stream is characterized in that comprising the steps:
(a) visit captions user describes record, obtains source data;
(b) source data that the captions user who obtains in the step (a) is described record is carried out the parsing of captions attribute, and figure/iconology technology to drawing captions image required rule or layout agreement obtain using a computer;
(c) rule or the layout agreement of utilizing step (b) to obtain, adopt software to generate the method for image, by calling the GDI in the computer system, automatically draw every frame captions image by graphic package, and obtaining the view data of every frame captions image, each two field picture gets up to constitute the image data sequence of captions continuously;
(d) the captions view data process of step (c) is encoded, and be packaged into the data flow that meets the digital caption standard.
2. the method for a kind of dynamic generation captions view data according to claim 1 and subtitle data stream, it is characterized in that: obtaining the captions user in the described step (a), to describe record access be that routine interface by storage data realizes that described routine interface comprises self-defining file interface or GDI.
3. the method for a kind of dynamic generation captions view data according to claim 2 and subtitle data stream, it is characterized in that: the trigger condition that described visit captions user describes record comprises, caption system finds that the data of describing the captions business have renewal or variation, perhaps have professional arrival to broadcast the time in the captions business of layout.
4. the method for a kind of dynamic generation captions view data according to claim 1 and subtitle data stream, it is characterized in that: the captions attribute in the described step (b) comprises the agreement and the rule of the captions picture of generation, and described captions picture comprises caption area size, alphabetic character, back gauge, font, motion mode, background decorative pattern, color, broadcasts the time, broadcasts pass.
5. according to the method for arbitrary described a kind of dynamic generation captions view data of claim 1～4 and subtitle data stream, it is characterized in that: in the described step (c), the every frame captions picture image that satisfies the captions requirement is created in internal memory or other memory device.
6. the method for a kind of dynamic generation captions view data according to claim 5 and subtitle data stream is characterized in that: content in described every frame captions picture image and character position are to calculate by program to obtain and the location.
7. the method for a kind of dynamic generation captions view data according to claim 1 and subtitle data stream, it is characterized in that: coding captions view data is meant in the described step (d), with the single-frame images data that generate in the step (c), according in DVB Subtitle (the Digital Video BroadcastingSubtitling System) standard coding requirement of captions image being encoded.
8. the method for a kind of dynamic generation captions view data according to claim 7 and subtitle data stream is characterized in that: encapsulation is meant in the described step (d), uses the notion encapsulation caption data in the DVB Subtitle captions standard.
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| CNB2005100221611A CN100364322C (en) | 2005-11-21 | 2005-11-21 | Method for dynamically forming caption image data and caption data flow |
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| CNB2005100221611A CN100364322C (en) | 2005-11-21 | 2005-11-21 | Method for dynamically forming caption image data and caption data flow |
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