CN101820524A - Video display method for video conference - Google Patents
Video display method for video conference Download PDFInfo
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- CN101820524A CN101820524A CN201010149661A CN201010149661A CN101820524A CN 101820524 A CN101820524 A CN 101820524A CN 201010149661 A CN201010149661 A CN 201010149661A CN 201010149661 A CN201010149661 A CN 201010149661A CN 101820524 A CN101820524 A CN 101820524A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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Abstract
The invention discloses a video display method for a video conference. The method comprises the steps of: receiving a first video stream and a second video stream by a video conference system; analyzing the first video stream to obtain first video data and analyzing the second video stream to obtain second video data; combining and encoding the first video data and the second video data to obtain a third video stream; and sending the third video stream a conference terminal. Due to the adoption of the technical scheme provided by the invention, two paths of high-definition video images can be displayed on the same layer of a multi-picture window under the condition of not changing the display mode and layout of the original conference terminal, so that the requirements of the user on the simultaneous display of the high-definition master video and the high-definition auxiliary video can be met.
Description
Technical field
The invention belongs to the video conference communication field, in particular to the video broadcasting method that is used for video conference.
Background technology
At present, the picture that TV conference system has realized a plurality of meeting-place shows on the display device in each meeting-place with the form of the similar video wall of a kind of many pictures, development along with the video conferencing technology, video conferencing is except can handling the main video that comprises a plurality of meeting-place picture, can also handle the second road video relevant (auxilliary video) that certain conference terminal sends, and the main Visual Display Data after will handling and auxilliary Visual Display Data send to each conference terminal demonstration respectively with active conference.Each conference terminal adopts following two kinds of methods usually when showing two-path video:
One, disposes the demonstration that a cover display device is assisted video separately again.Adopt this method, each side's additional configuration display device that need participate in a conference has not only increased the cost of video conference, and also inconvenient convention goer watches.
Two, main video shows with different form stacks with auxilliary video.As shown in Figure 1, a kind of superposition display mode is: main video (first via video) shows each meeting live video as the bottom form with the form of video wall, and auxilliary video (the second road video) is superimposed upon on the main video as the little form in upper strata and shows.Adopt this display mode, a sprite of main video must be blocked.As shown in Figure 2, another kind of superposition display mode is: the bottom form is auxilliary video, and the little form in upper strata is main video.Adopt this display mode, the part picture of auxilliary video is by main video shelter, and it is littler that a plurality of sprites of main video show, influences the convention goer and watch, and can only solve by the screen that enlarges display device.
As the above analysis, no matter take above-mentioned which kind of prior art to show two-path video, all have the problem of equipment cost height, user experience difference.
Summary of the invention
Main purpose of the present invention is to provide a kind of video broadcasting method that is used for video conference, shows that to solve existing video conference system at least there is the problem of equipment cost height, user experience difference in two-path video.
According to an aspect of the present invention, provide a kind of video broadcasting method that is used for video conference, having comprised: video conference system receives first video flowing and second video flowing; Resolve first video flowing and obtain first video data, resolve second video flowing and obtain second video data; First video data and second video data merging coding are obtained the 3rd video flowing; Send the 3rd video flowing to conference terminal.
Further, be no more than in the summation of the bandwidth of the bandwidth of first video flowing and second video flowing under the prerequisite of the total bandwidth that video conference system supports, the bandwidth of first video flowing is the arbitrary value less than total bandwidth; The bandwidth of second video flowing is the arbitrary value less than total bandwidth.
Further, first video data and second video data being merged coding obtains the 3rd video flowing and comprises: determine the viewing area of first video data and the viewing area of second video data respectively; By the viewing area of first video data and the viewing area of second video data are merged to a viewing area, first video data and second video data merging coding are obtained the 3rd video flowing.
Further, before receiving first video flowing and second video flowing, method comprises: video conference system distributes the first video flowing memory space and the second video flowing memory space.
Further, obtain first video data at parsing first video flowing, resolve second video flowing and obtain before second video data, method comprises: obtain first video flowing from the first video flowing memory space, obtain second video flowing from the second video flowing memory space.
Further, first video flowing comprises the video flowing at each meeting scene.
Further, the first video flowing memory space comprises: a plurality of sub-memory spaces, store the video flowing at each meeting scene respectively.
Further, resolving first video flowing obtains first video data and comprise: the video flowing of resolving the meeting scene obtains first video data; The viewing area of determining first video data comprises: the viewing area of determining the meeting scene.
Further, the video flowing of resolving the meeting scene obtains first video data and comprises: the video flowing of resolving one or more meetings scene obtains first video data.
Further, second video flowing comprises other video flowings that conference terminal sends.Further, the second video flowing memory space comprises: a plurality of sub-memory spaces, store other video flowings respectively from each meeting scene.
Further, resolving second video flowing obtains second video data and comprises: resolve other video flowings that conference terminal sends and obtain second video data; The viewing area of determining second video data comprises: the viewing area of determining other video flowings.
Further, resolving other video flowings that conference terminal sends obtains second video data and comprises: resolve other video flowings that one or more conference terminals send and obtain second video data.
By the present invention, video conference system is resolved two-path video stream respectively and is merged coding, export one road video flowing and give conference terminal, having solved existing video conference system output two-path video flows to conference terminal and shows, the conference terminal cost height that causes, the problem of user experience difference, thereby effectively utilized the surplus resources of video conference system, need not to change or increase the display device of conference terminal, and under the prerequisite that does not change original conference terminal display mode and layout, showing the two-way high clear video image with many pictures of one deck form, satisfying the user high definition master video and high definition are assisted the demand that video shows simultaneously.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the two-path video display effect figure according to the video conference terminal of prior art;
Fig. 2 is the two-path video display effect figure according to the another kind of video conference terminal of prior art;
Fig. 3 is the video conference networking schematic diagram according to the embodiment of the invention;
Fig. 4 is the flow chart according to the video broadcasting method of the video conference of the embodiment of the invention;
Fig. 5 is video conference scheduling and the WEB process chart according to the embodiment of the invention one;
Fig. 6 is the flow chart according to the multipoint control unit Resources allocation of the embodiment of the invention one;
Fig. 7 is the image processing flow chart according to the embodiment of the invention one;
Fig. 8 is the two-path video display effect figure according to the video conference terminal of the embodiment of the invention two;
Fig. 9 is the two-path video display effect figure according to the video conference terminal of the embodiment of the invention three;
Figure 10 A is the two-path video display effect figure according to meeting-place one terminal of the embodiment of the invention four;
Figure 10 B is the two-path video display effect figure according to meeting-place two terminals of the embodiment of the invention four;
Figure 10 C is the two-path video display effect figure according to meeting-place three terminals of the embodiment of the invention four;
Figure 10 D is the two-path video display effect figure according to meeting-place four terminals of the embodiment of the invention four.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 3 is the video conference networking schematic diagram that is suitable for the video broadcasting method of the video conference that the embodiment of the invention provides.As shown in Figure 3, video conference system connects a plurality of conference terminals respectively, one of them conference terminal is as the meeting promoter, hold video conference by conference system, after meeting is held successfully, any one conference terminal can provide first via video (main video) to video conference system, and any one conference terminal also can provide the second road video (auxilliary video) to video conference system.Video conference system is through after the processing to main video and auxilliary video, and the new video stream (comprising main video pictures and auxilliary video pictures) that the back of encoding is again formed sends to each conference terminal demonstration.
According to the embodiment of the invention, a kind of video broadcasting method that is used for video conference is provided, as shown in Figure 4, this method comprises:
Step S402, video conference system receive first video flowing and second video flowing;
Step S404, parsing first video flowing obtain first video data, resolve second video flowing and obtain second video data;
Step S406, first video data and second video data are merged coding obtain the 3rd video flowing;
Step S408, transmission the 3rd video flowing are to conference terminal.
Existing video conference technology, at the two-path video image, why conference terminal can be divided into two-layer form and show main video and auxilliary video respectively, be because video conference system has sent two-path video stream to conference terminal, and conference terminal does not possess the function that two-path video stream is merged coding, therefore, can only layering show.
The said method that the embodiment of the invention provides, in video conference system, two-path video stream (first video flowing and second video flowing) is decoded, and carry out encoding operation again by two video pictures are integrated with a display frame as sprite, send to conference terminal thereby form unique video flowing (the 3rd video flowing).Therefore, conference terminal has received only one road video flowing and just can the form with sprite show two-path video simultaneously in one deck form.
In above-mentioned steps S402, the multipoint control unit of video conference system control access unit receives first video flowing and second video flowing.First video flowing can be considered as main video flowing, the second frequency stream is considered as auxilliary video flowing.Wherein, main video flowing and auxilliary video flowing with based on the video protocols standard distinguish, for example main video flowing adopts H323 standard agreement coding, auxilliary video flowing adopts H239 standard agreement coding.
In concrete implementation process, access unit is removed the packet header such as IP, UDP of first video flowing and second video flowing to the processing of unifying to unpack of first video flowing and second video flowing, obtains the video code flow (for example H264 video code flow) of standard.These video code flows general designation elementary streams (Elementary Stream is called for short ES) for example are the code streams of a frame one frame crossed through the H264 technique compresses.
In above-mentioned steps S404, the multipoint control unit control graphics processing unit of video conference system is respectively to first video flowing and second decoding video stream, because first video flowing adopts different consensus standard codings with second video flowing, therefore, when decoding, decode respectively to first video flowing and second video flowing according to different consensus standards, the decoding back forms the basic video data of two classes, comprises first video data and second video data.
In concrete implementation process, a certain ES flows a certain chip that sends to graphics processing unit by the McBsp serial ports of graphics processing unit, and this chip has just been born the decoding task of this ES stream.
The H264 header packet information decompress(ion) that each chip is removed ES stream obtains a frame code stream, give decoder then and parse yuv data, for the yuv data that solves, it is the zonule of unit that decoding chip is divided into it with the 16*16 pixel size, then according to final picture displayed number N, the yuv data that solves is scaled to the 1/N of life size, for example synthetic at last is four pictures, then each sprite size is 1/4 of an integral body, and the yuv data after dwindling sends coding chip to by the SRIO circuit and encodes.Need to prove that above-mentioned coding/decoding method is a kind of preferred coding/decoding method, in concrete implementation process, be not limited to adopt said method that ES stream is resolved, also can adopt other existing video flowing analytic methods.
In above-mentioned steps S406, under the control of the multipoint control unit of video conference system, graphics processing unit will be decoded, and the back forms first video data and second video data merges coding, forms the 3rd video flowing that is shown at same level form.
In concrete implementation process, merging coding is the anti-process of decode procedure substantially, behind the yuv data of coding chip after collecting all convergent-divergents, it is synthesized one road complete yuv data, become frame data by encoder encodes then, coding chip is stamped H264 packet header with these data and is compressed, and sends in the memory space of appointment by the McBsp serial ports then and goes.Need to prove that above-mentioned merging coding method is a kind of preferred coding method, in concrete implementation process, be not limited to adopt above-mentioned coding method to carry out video data and merge coding, also can adopt other existing video stream encoding methods.
In above-mentioned steps S408, video conference system sends to each conference terminal by its access unit with the 3rd video flowing.Conference terminal is directly play the 3rd video flowing after receiving the 3rd video flowing on display device, its display format is the video wall form, promptly has only one deck form, and viewing window pictures is divided into a plurality of sprites, one of them sprite is play auxilliary video image, and all the other sprites are play main video image.
Video broadcasting method by above-mentioned video conference, the video flowing of two-way different agreement coding resolved and coding again, form new video flowing, make conference terminal that the two-path video picture is shown that the form with video wall is presented in the same level form, compare with the video playback mode of existing video conference, said method has effectively utilized the multipoint control unit in the existing video conference system, graphics processing unit and access unit merge processing to two-path video, form one road video and export conference terminal to, what make conference terminal need not to increase or enlarge display device.And this method with one deck form demonstration two-way high clear video image, has satisfied the user high definition master video and high definition has been assisted the demand that video shows simultaneously under the prerequisite of the video wall display mode of having inherited original conference terminal and layout.
Preferably, in specific implementation process, be no more than in the bandwidth sum that guarantees first video flowing and second video flowing under the prerequisite of the total bandwidth that video conference system can support, can bandwidth ratio be set arbitrarily according to the customized requirement of user's meeting.For example, if the user to the requirement height of main video display quality, then increases the bandwidth of main video flowing, the corresponding bandwidth that reduces auxilliary video flowing, if customer requirements improves the display quality of auxilliary video, then can increase bandwidth, the bandwidth of the main video flowing of corresponding minimizing for auxilliary video flowing.Handle flexibly by bandwidth setting, satisfied the requirement of user for a certain road video display quality to two-path video.
Preferably, first video data and second video data being merged coding obtains the 3rd video flowing and comprises: determine the viewing area of first video data and the viewing area of second video data respectively; By the viewing area of first video data and the viewing area of second video data are merged to a viewing area, first video data and second video data merging coding are obtained the 3rd video flowing.
Because the purpose that main video data and auxilliary video data are merged coding is to merge data flow that coding forms when playing, can in different viewing areas, show two-path video respectively with one deck form, therefore, before coding, to determine the viewing area of main video data and the viewing area of auxilliary video data respectively, and respectively main video data and auxilliary video data be enrolled in the corresponding display region.
Adopt above-mentioned preferred merging coding method, the meeting organizer can select the display mode of two-path video flexibly, for example plays main video or auxilliary video in the norator picture of display window, can adjust the size of main video or auxilliary video playback picture.
Preferably, before receiving first video flowing and second video flowing, said method can also comprise: video conference system distributes the first video flowing memory space and the second video flowing memory space.
In concrete implementation process, the access unit of process video conference system goes after IP bag and the processing of UDP bag, obtain the ES stream of first video flowing and the ES stream of second video flowing respectively, the multipoint control unit of video conference system is controlled these ES streams and is placed on corresponding memory space.
In concrete implementation process, when the user carries out two-path video video conference reservation as the meeting promoter, the multipoint control unit of video conference system is that main video and auxilliary video are allocated corresponding memory space in advance, main video flowing that adheres to different agreement separately that receives like this and auxilliary video flowing just are stored in memory space separately, and the view data that makes image processing module need not to distinguish in the memory block is main video flowing or auxilliary video flowing.
Preferably, said method can also be with existing two-path video broadcast mode means as a supplement, and set is gone in the video broadcasting method of the video conference that the embodiment of the invention provides.In concrete implementation process, the multipoint control unit of video conference system increases the display mode arbitration functions, before starting video playback capability, judge at first whether the user is chosen in the auxilliary video of demonstration in one deck multi-picture television wall, if, graphics processing unit obtains main video flowing respectively and auxilliary video flowing carries out subsequent treatment under the control of multipoint control unit; If not, then graphics processing unit only obtains main video flowing and carries out subsequent treatment, and auxilliary video flowing need not graphics processing unit and handles, and directly is sent to each conference terminal as the second road video flowing through access unit.Under this processing mode, the image frame that each conference terminal shows is divided into two-layer, and one deck is main video image, and another layer is auxilliary video image.
Preferably, obtain first video data at parsing first video flowing, resolve second video flowing and obtain before second video data, method comprises: obtain first video flowing from the first video flowing memory space, obtain second video flowing from the second video flowing memory space.
In concrete implementation process, the multipoint control unit of video conference system control graphics processing unit obtains corresponding ES code stream from different memory spaces, resolves ready for graphics processing unit carries out ES stream.
Judging user's indication at multipoint control unit shows under the situation of auxilliary video in one deck multi-picture television wall, when conference reservation by and hold successfully after, the memory location of multipoint control unit notice graphics processing unit master video flowing and the memory location of auxilliary video flowing, graphics processing unit obtains main video flowing from the memory location of main video flowing and resolves, and obtains auxilliary video flowing from the memory location of auxilliary video flowing and resolves.Obtain main video flowing and auxilliary video flowing by above-mentioned method for optimizing, video conference system can specifically carry out parsing work to which video flowing according to the broadcast mode decision that the user selects, need not all video flowings to be carried out dissection process at every turn, saved the resource of system effectively.
Preferably, first video flowing can comprise the video flowing at each meeting scene.In conjunction with networking diagram shown in Figure 3, main video can comprise the video flowing of each meeting live video image, these video flowings are encoded with same video protocols, for example all adopt the H323 protocol code, so just the video at each meeting scene can be integrated with in the multi-picture television wall with one deck form and show.
With the video flowing unification at each meeting scene processing method as main video flowing, make winner's video image be not limited to a video pictures, as long as a plurality of video flowings adopt with a kind of video protocols coding, a plurality of video flowing integral body can be considered as main video flowing, make and the display mode variation more of conference terminal have more friendly.
Preferably, the first video flowing memory space can comprise: a plurality of sub-memory spaces, store the video flowing at each meeting scene respectively.
In concrete implementation process, if main video flowing has comprised the video flowing of a plurality of employing same protocol codings, for example, the video flowing at a plurality of meetings scene of the employing same protocol coding then memory space of above-mentioned main video flowing (i.e. the first video flowing memory space) can also be subdivided into a plurality of sub-memory spaces, stores the video flowing at each meeting scene respectively.Adopt this preferred mode that the memory space of main video flowing is divided into a plurality of sub-memory spaces, can provide display mode more flexibly to the user, for example, the user can select the video pictures at certain meeting scene to need not to show, then graphics processing unit need not to obtain video flowing in the sub-memory space with the on-the-spot corresponding video flowing of this meeting, need only to need to the sub-memory space of the video flowing at the meeting scene that shows to obtain corresponding video flowing and resolve, thereby saved the resource of system further.
Preferably, resolving first video flowing obtains first video data and can comprise: the video flowing of resolving the meeting scene obtains first video data; The viewing area of determining first video data comprises: the viewing area of determining the meeting scene.
Meeting with three meeting-place, four pictures is an example, first video flowing comprises the video flowing and one second video flowing in three meeting-place, after the access unit of process video conference system goes IP bag and UDP bag to handle, symbiosis becomes four road ES stream, is decoded by four chips of the graphics processing unit of video conference system respectively.The H264 header packet information decompress(ion) that each chip is removed ES stream obtains a frame code stream, give decoder then and parse yuv data, for the yuv data that solves, it is the zonule of unit that decoding chip is divided into it with the 16*16 pixel size, be scaled to then life size 1/4 (because of last synthetic is four pictures, each sprite size is whole 1/4), send coding chip to by the SRIO circuit and encode, the processing procedure of four decoding chips is identical.
Behind the yuv data of coding chip after collecting all convergent-divergents, determine the viewing area of the yuv data of the viewing area of yuv data of different meeting live videos and auxilliary video, afterwards according to determining that the YUV of good viewing area with its each meeting live video synthesizes one road complete yuv data, become frame data by encoder encodes then, coding chip is stamped H264 packet header with these data and is compressed, and sends in the memory space of appointment by the McBsp serial ports then and goes.
Need to prove that the method for above-mentioned decoding and decoding is a method for optimizing, in concrete implementation process, be not limited to adopt above-mentioned decoding and coding method, also can adopt other existing decoding video stream and coding methods.
Preferably, in specific implementation process, if the user is chosen in the multi-picture television wall video pictures that shows all meeting scenes, then the graphics processing unit video flowing that obtains all meeting scenes is resolved, and first video data of formation has comprised the Visual Display Data at all meeting scenes.And merging in the process of coding, need to determine the viewing area of each meeting live video image, thereby satisfy user customized to concrete display layout with auxilliary Visual Display Data.
Preferably, in specific implementation process, if the user is chosen in video pictures or certain the several specific meeting scene that only show some meetings scene in the multi-picture television wall, then the graphics processing unit video flowing that only obtains the meeting scene that the user selectes is resolved, and first video data of formation has comprised the Visual Display Data at the meeting scene that the user selectes.And merging in the process of coding, need to determine the viewing area of selected meeting live video image, thereby satisfy user customized to concrete display layout with auxilliary Visual Display Data.
, video conference system is handled flexibly to the video flowing at each meeting scene in the main video flowing, thereby satisfied the diversity of the customized display layout of user preferably to the analytic method and the preferred merging coding method of main video flowing by above-mentioned.
Preferably, second video flowing comprises other video flowings that one or more conference terminals send.In conjunction with networking diagram shown in Figure 3, auxilliary video (second video flowing) can comprise other videos that one or more conference terminals send, for example relevant with the meeting main body one or more image datas.The video flowing of these other videos is encoded with same video protocols, for example all adopts the H239 protocol code, so just one or more other video images can be integrated with one deck multi-picture television wall to show.
The unified processing method of other video flowings with the same video protocols coding of one or more employings as auxilliary video flowing, make auxilliary video image be not limited to a video pictures, and can handle through video conference system, integrate with one deck form with main video image and show.As long as a plurality of other video flowings adopt with a kind of video protocols coding, a plurality of other video flowing integral body can be considered as auxilliary video flowing, make the display mode variation more of conference terminal to have more friendly.
Preferably, the second video flowing memory space also can comprise: a plurality of sub-memory spaces, and respectively from other video flowings of a plurality of conference terminals.
In concrete implementation process, if auxilliary video flowing (second video flowing) has comprised the video flowing of a plurality of employing same protocol codings, for example, adopt the video flowing of a plurality of conference terminals transmissions of same protocol coding, then the memory space of above-mentioned auxilliary video flowing (i.e. the second video flowing memory space) can also be subdivided into a plurality of sub-memory spaces, and storage comes other video flowings to a plurality of conference terminals respectively.The memory space that adopts this preferred mode will assist video flowing is divided into a plurality of sub-memory spaces, can provide display mode more flexibly to the user, for example, the user can select to show every other video, then graphics processing unit obtains every other video and carries out dissection process from the corresponding sub-memory space in auxilliary video storage space, if the user selects only to show some other video wherein, then the graphics processing unit memory space that only need arrive other videos that need to show obtains corresponding video flowing and resolves, thereby has saved the resource of system further.
Preferably, resolving second video flowing obtains second video data and comprises: resolve other video flowings and obtain second video data; The viewing area of determining second video data comprises: the viewing area of determining other video flowings.
Preferably, in specific implementation process, show every other video pictures if the user is chosen in the multi-picture television wall, then the graphics processing unit video flowing that obtains every other video is resolved, and second video data of formation has comprised that all understand other Visual Display Datas.And merging in the process of coding with main Visual Display Data, needing to determine each other viewing area of images frequently, thereby satisfying user customized to concrete display layout.
Preferably, in specific implementation process, if the user is chosen in other videos that only show in the multi-picture television wall that some is specific, then the graphics processing unit video flowing that only obtains other videos that the user selectes is resolved, and second video data of formation has comprised the video data of other videos that the user selectes.And merging in the process of coding, need to determine the viewing area of other selected videos, thereby satisfy user customized to concrete display layout with main Visual Display Data.
, video conference system is handled flexibly to a plurality of other video flowings in the auxilliary video flowing, thereby satisfied the diversity of the customized display layout of user preferably to the analytic method and the preferred merging coding method of auxilliary video by above-mentioned.
Be presented in the embodiment that realizes showing in many pictures of one deck form two-path video in the TV conference system below in conjunction with specific embodiment.
Embodiment one
In the present embodiment, describe the video conference system handling process in detail, specific as follows:
The step S301.WEB page judges whether that according to conference capability needs add the option of auxilliary video in many image contents are selected;
As shown in Figure 5, described in the figure is to be high definition 720P form if the user disposes the form of main video and auxilliary video in the meeting template, auxilliary video is a H239 standard double fluid agreement, and auxilliary video rate is less than main video rate (promptly auxilliary video bandwidth is less than the meeting total bandwidth), so when holding a meeting, multipoint control unit sends many image contents message to WEB, WEB adds " auxilliary video " in the sprite content options of many pictures, the a certain meeting-place of participant is if send auxilliary video like this, and the user just can select " auxilliary video " to watch.
Step S302. multipoint control unit is that the meeting of double-current many pictures distributes corresponding resource, and carries out scheduling of resource in meeting.
As shown in Figure 6, when meeting the conference reservation of double-current many pictures and after meeting holds successfully, the situation of multipoint control unit Resources allocation.When the user carried out the reservation of double-current multi-frame session, the same with other double-current meetings, multipoint control unit is respectively main video and auxilliary video is allocated the respective stored resource in advance; When conference reservation by and hold successfully after, the multiple spot processing layer issues view data source message and gives graphics processing unit (using the HDPU plate here), the decoding processing of main video is carried out by it in the memory location at the main video of its of announcement place; If the user selects auxilliary video to add in many pictures, multiple spot processing unit then issuing message is given image plate, and the decoding processing of video is assisted by it in the memory location of its auxilliary video of announcement.
Step S303, when the content of selecting many pictures comprises auxilliary video, the handling process of each veneer.
As shown in Figure 7, the same with common multi-frame session, auxilliary video takies certain system resource, when the user selects auxilliary video to add many pictures, the storage resources bus scope (memory location that comprises the place of main video and auxilliary video) of the image plate view data to be decoded of multiple spot processing unit announcement, whether graphics processing unit needn't the differentiate between images data be main video or auxilliary video then, need only get view data from corresponding position decodes and gets final product, graphics processing unit is through inter-process then, with main video and the auxilliary video synthetic multiple image of encoding together, put on the image output bus of multiple spot processing unit, transmit video code flow by access unit and give each meeting-place terminal, on the display device in each meeting-place, demonstrate the actual effect of double-current many pictures.(if the user is chosen as auxilliary video with the content of all many pictures, then the image of many pictures all shows the image of auxilliary video in the meeting, and a plurality of pictures can be shown as the auxilliary video of same content, also can be shown as the auxilliary video of different content).
In addition, the frame numbers of two-way Multipicture meeting support can reach 16, also supports the coupling of different rates simultaneously, the mixed net that various special lines and IP insert, satisfy the demand of different video bandwidth, different access way, different pictures number, processing mode is similar to the above.
Embodiment two
In the present embodiment, be example with four frame TV meetings, after description two-path video (main video and auxilliary video) merges processing through video conference system, a kind of display effect on conference terminal.
In the present embodiment, the meeting promoter initiates four-party conference, and customized display frame, concrete display mode is, in one deck video wall form, show the live video (main video) in meeting-place one, meeting-place two and meeting-place three, and show the video data relevant (auxilliary video) that sends by meeting-place one with Session Topic.In the process that meeting is carried out, the concrete condition that the meeting promoter can carry out according to meeting is upgraded the displaying contents of four pictures, for example after auxilliary video playback finishes, shows the live video in meeting-place four again.Concrete display effect as shown in Figure 8.
For reaching above-mentioned display effect, the multipoint control unit of video conference system judges that the customized broadcast mode of user is that the sprite that auxilliary video joins in the same layer form of main video is shown, multipoint control unit control graphics processing unit obtains the video flowing (a plurality of meeting-place video flowing is as main video flowing) that the user selects the meeting-place video that shows from the corresponding sub-memory space in main video storage space, from the corresponding sub-memory space in auxilliary video storage space, obtain auxilliary video flowing, remerge coding after main video flowing and auxilliary video flowing decoded respectively, the video flowing that generates one deck form that is shown as many pictures is exported to each conference terminal.
Embodiment three
In the present embodiment, be example with four frame TV meetings, after description two-path video (main video and auxilliary video) merges processing through video conference system, a kind of display effect on conference terminal.
In the present embodiment, the meeting promoter initiates four-party conference, what participate in a conference has only the three parts, then customized display frame, concrete display mode is, in one deck video wall form, show the live video (main video) in meeting-place one, meeting-place two and meeting-place three, and show the video data relevant (auxilliary video) that sends by meeting-place one with Session Topic.In the process that meeting is carried out, the concrete condition that the meeting promoter can carry out according to meeting is upgraded the displaying contents of four pictures, for example switches the demonstration size of sprite display position or certain sprite of main video or auxilliary video.Concrete display effect as shown in Figure 9.
For reaching above-mentioned display effect, the multipoint control unit of video conference system judges that the customized broadcast mode of user is that the sprite that auxilliary video joins in the same layer form of main video is shown, multipoint control unit control graphics processing unit obtains the video flowing (all meeting-place video flowings are as main video flowing) of all meeting-place videos from the corresponding sub-memory space in main video storage space, from the corresponding sub-memory space in auxilliary video storage space, obtain auxilliary video flowing, remerge coding after main video flowing and auxilliary video flowing decoded respectively, the video flowing that generates one deck form that is shown as many pictures is exported to each conference terminal.
Embodiment four
In the present embodiment, be example with four frame TV meetings, after description two-path video (main video and auxilliary video) merges processing through video conference system, a kind of display effect on conference terminal.
In the present embodiment, the meeting promoter initiates four-party conference, provide different display frame at each meeting-place, concrete display mode is, offer the display frame in meeting-place one, the live video (main video) that shows meeting-place two, meeting-place three and meeting-place four, and show the video data relevant (auxilliary video) that sends by meeting-place one with Session Topic; The display frame that offers meeting-place two is the live video (main video) in meeting-place one, meeting-place three and meeting-place four, and shows the video data relevant with Session Topic (auxilliary video) that is sent by meeting-place one; The display frame that offers meeting-place three is the live video (main video) in meeting-place one, meeting-place two and meeting-place four, and shows the video data relevant with Session Topic (auxilliary video) that is sent by meeting-place one.In the process that meeting is carried out, the concrete condition that the meeting promoter can carry out according to meeting, upgrade the displaying contents of each display frame respectively, for example switch main video or the sprite display position of auxilliary video or the demonstration size of certain sprite of certain or all display frame.The concrete display effect at four meeting scenes is shown in Figure 10 A-Figure 10 D.
For reaching above-mentioned display effect, the multipoint control unit of video conference system judges that the customized broadcast mode of user is that the sprite that auxilliary video joins in the same layer form of main video is shown.At each conference terminal, multipoint control unit control graphics processing unit obtains the video flowing (all the other meeting-place video flowings are referred to as main video flowing) of all the other the meeting-place videos except that this meeting scene from the corresponding sub-memory space in main video storage space, from the corresponding sub-memory space in auxilliary video storage space, obtain auxilliary video flowing, remerge coding after main video flowing and auxilliary video flowing decoded respectively, generate video flowing respectively, and the video flowing that will generate is respectively exported to corresponding conference terminal at each video terminal.
From above description, as can be seen, the video conference system that the embodiment of the invention provides is resolved two-path video stream respectively and is merged coding, export one road video flowing and give conference terminal, having solved existing video conference system output two-path video flows to conference terminal and shows, the conference terminal cost height that causes, the problem of user experience difference, thereby effectively utilized the surplus resources of video conference system, need not to change or increase the display device of conference terminal, and under the prerequisite that does not change original conference terminal display mode and layout, showing the two-way high clear video image with one deck form, satisfying the user high definition master video and high definition are assisted the demand that video shows simultaneously.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a video broadcasting method that is used for video conference is characterized in that, comprising:
Video conference system receives first video flowing and second video flowing;
Resolve described first video flowing and obtain first video data, resolve described second video flowing and obtain second video data;
Described first video data and described second video data merging coding are obtained the 3rd video flowing;
Send described the 3rd video flowing to conference terminal.
2. method according to claim 1 is characterized in that, is no more than in the summation of the bandwidth of the bandwidth of described first video flowing and described second video flowing under the prerequisite of the total bandwidth that described video conference system supports,
The bandwidth of described first video flowing is the arbitrary value less than described total bandwidth;
The bandwidth of described second video flowing is the arbitrary value less than described total bandwidth.
3. method according to claim 1 is characterized in that, described first video data and described second video data is merged coding obtain the 3rd video flowing and comprise:
Determine the viewing area of described first video data and the viewing area of second video data respectively;
By the viewing area of described first video data and the viewing area of second video data are merged to a viewing area, described first video data and second video data merging coding are obtained the 3rd video flowing.
4. method according to claim 3 is characterized in that, before receiving first video flowing and second video flowing, described method comprises: described video conference system distributes the first video flowing memory space and the second video flowing memory space.
5. method according to claim 4, it is characterized in that, obtain first video data at described first video flowing of parsing, resolving described second video flowing obtains before second video data, described method comprises: obtain described first video flowing from the described first video flowing memory space, obtain described second video flowing from the described second video flowing memory space.
6. method according to claim 5 is characterized in that described first video flowing comprises the video flowing at each meeting scene.
7. method according to claim 6 is characterized in that, the described first video flowing memory space comprises: a plurality of sub-memory spaces, store the video flowing at each meeting scene respectively.
8. according to claim 6 or 7 described methods, it is characterized in that,
Resolving described first video flowing obtains first video data and comprise: the video flowing of resolving the meeting scene obtains described first video data;
The viewing area of determining described first video data comprises: the viewing area of determining described meeting scene.
9. method according to claim 8 is characterized in that, the video flowing of resolving the meeting scene obtains described first video data and comprises: the video flowing of resolving one or more meetings scene obtains described first video data.
10. method according to claim 5 is characterized in that, described second video flowing comprises other video flowings that one or more conference terminals send.
11. method according to claim 10 is characterized in that, the described second video flowing memory space comprises: a plurality of sub-memory spaces, store other video flowings respectively from each meeting scene.
12. according to claim 10 or 11 described methods, it is characterized in that,
Resolving described second video flowing obtains second video data and comprises: resolve other video flowings that conference terminal sends and obtain described second video data;
The viewing area of determining described second video data comprises: the viewing area of determining described other video flowings.
13. method according to claim 12 is characterized in that, other video flowings of resolving the conference terminal transmission obtain described second video data and comprise: other video flowings of resolving one or more conference terminals transmissions obtain described second video data.
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| CN201010149661A CN101820524A (en) | 2010-03-22 | 2010-03-22 | Video display method for video conference |
| PCT/CN2010/079190 WO2011116611A1 (en) | 2010-03-22 | 2010-11-26 | Method for playing video of tv meeting |
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