CN104601932A - Satellite video conference system and method - Google Patents
Satellite video conference system and method Download PDFInfo
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Abstract
The invention provides satellite video conference system and method. The satellite video conference system comprises a main conference place system, and a plurality of secondary conference place systems which communicate with the main conference place system through a satellite delivery system; the main conference place system comprises a main conference video processing part and a first input/ output device; the first input/ output device is connected with a main conference place video processing part through data; the main conference place system further comprises a satellite bandwidth management unit; each secondary conference place system comprises a secondary conference place video processing part, and a second input/ output device which is connected with the secondary conference place video processing part through the data; each second input/ output device is used for acquiring the media information of each secondary conference place and sending to each secondary conference place video processing part. With the adoption of the satellite video conference system and method, the coverage range of the video conference is expanded, and the transmission rate is high.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the method for satellite video conference system and satellite video meeting.
Background technology
Video conferencing system is a kind of novel means of communication, and it can point-to-point communication, also can Multipoint-to-Multipoint.It carries media information on same transmission line: video, audio frequency and data etc., realize multiple spot real-time, interactive communications, also the active situation of different location participant, conference content and various file can be presented in each sub-venue with the form of visual news simultaneously.Video conferencing system generally carries out information transmission by general wide area network or local area network (LAN), and the impact by network is comparatively large, and transmission rate is low, and being subject to network, to limit its coverage also very limited.
Summary of the invention
An object of the present invention is to provide a kind of the wide coverage of video conference, transmission rate can be made high satellite video conference system and the method for satellite video meeting.
According to an aspect of the present invention, provide a kind of satellite video conference system, comprise main meeting-place system and multiple sub-venue system, described main meeting-place system is communicated by satellite delivery system with multiple described sub-venue system, wherein, described main meeting-place system comprises main meeting-place video processing component and the first input-output equipment, described first input-output equipment and described main meeting-place video processing component data cube computation, described first input-output equipment carries out the media information of acquisition main meeting-place and sends to described main meeting-place video processing component, and the media information received from described main meeting-place video processing component, described main meeting-place video processing component and described satellite delivery system transfer of data, described main meeting-place system also comprises satellite bandwidth administrative unit, for: according to band data and the predetermined priority policy of satellite, determine that satellite passes on the sequencing of media information of described sub-venue feedback, described sub-venue system comprises sub-venue video processing component and the second input-output equipment, described second input-output equipment and described sub-venue video processing component data cube computation, described second input-output equipment carries out the media information of acquisition sub-venue and sends to described sub-venue video processing component, and the media information, described sub-venue video processing component and the described satellite delivery system transfer of data that receive from described sub-venue video processing component.
Further, described main meeting-place video processing component comprises: the first satellite communication end, with described satellite delivery system data cube computation; Multipoint controller, is electrically connected with described first satellite communication end; First DTU (Data Transfer unit), is electrically connected with described multipoint controller, described first DTU (Data Transfer unit) and the mutual media information of described multipoint controller.
Further, described sub-venue video processing component comprises: the second satellite communication end, with described satellite delivery system data cube computation; Second DTU (Data Transfer unit), is electrically connected with described second satellite communication end, the second DTU (Data Transfer unit) and the mutual media information of described second satellite communication end.
Further, described first DTU (Data Transfer unit) and described second DTU (Data Transfer unit) include the multimedia signal processing machine of codec, described codec is connected with Received signal strength with described satellite data and decodes, or transmits after being encoded by media information.
Further, described multipoint controller comprises: network interface unit, Call Control Unit, multiplexed unit, demultiplexing unit, audio process, data processor, control processor, key handling distributor and call control processor; Described first input-output equipment and described second input-output equipment include: colour picture monitor, sound system, video camera, video tape recorder and display.
According to another aspect of the present invention, provide a kind of method of satellite video meeting, use above-mentioned satellite video conference system, comprising: the media information of main meeting-place is sent to multiple sub-venue by satellite delivery system; Whether detect described sub-venue to described main meeting-place feedback media information; When described sub-venue has feedback media information, the media information fed back by described sub-venue sends to described main meeting-place by satellite delivery system; When described sub-venue does not feed back media information, only transmit the media information of described main meeting-place to multiple described sub-venue.
Further, according to the media information of multiple described sub-venue feedback, the described sub-venue that one of them priority level is the highest is selected according to the priority of above-mentioned sub-venue, the media information transmission fed back gives described main meeting-place, its media information transmission, according to priority order from high to low, is given described main meeting-place by sub-venue one by one described in other in multiple.
Further, multiple described sub-venue is set different Permission Levels from high to low; The order of described priority is determined from high to low according to the Permission Levels of described sub-venue.
Further, detect the feedback moment of multiple described sub-venue, according to described feedback moment arrangement sequencing; The order of described priority is determined according to the feedback time sequencing of described sub-venue.
Further, the satellite transmission bandwidth that the media information detecting multiple described sub-venue feedback takies; When the satellite transmission bandwidth that the media information of multiple described sub-venue feedback takies is less than predetermined value, be then transferred to described main meeting-place simultaneously; When the satellite transmission band that the media information of multiple described sub-venue feedback takies is wider than predetermined value, then continue the satellite transmission bandwidth that this media information of detection takies after reducing the media information of sub-venue feedback described in one of them, until it is less than predetermined value.
Satellite video conference system has the following advantages:
1 wide coverage, saves running cost
During satellite video conference system is specially adapted to, long-distance transmissions, have and cover on a large scale, by the feature of the restriction of region, landform and terrestrial broadcast networks, terrestrial communication networks.And communications cost and range-independence, distance advantage far away is more obvious, can make full use of Internet resources, saves operating cost.
2 transfer rates are high, high stability
This system adopts DVB broadcast and IP data double-way to transmit the advanced technology combined, support video standards, can carry out the transmission of mass file (speech, data, video image etc.), having more high definition, is high-speed datacasting system.This system also has high level security and stability.
3 transmission meanss are flexible
Can provide unidirectional, two-way satellite communication, provide multiple business service, and have extremely strong autgmentability and retractility, bandwidth expansion is simple, and web construction and resettlement are flexibly, conveniently.Satellite video conference system, by being structured in the transmission platform of " in the air ", can transmitting interactively video information very neatly, have more the performance advantage that ground network is incomparable in the video conference of medium and long distance.Satellite video conference system can be widely used in the industry-by-industries such as government, finance, the energy, traffic, medical treatment, education, and typical field of application comprises broadcast conference, corporate training and comprehensive multimedia programming etc.
According to hereafter by reference to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will understand above-mentioned and other objects, advantage and feature of the present invention more.
Accompanying drawing explanation
Hereinafter describe specific embodiments more of the present invention with reference to the accompanying drawings by way of example, and not by way of limitation in detail.Reference numeral identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that these accompanying drawings may not be drawn in proportion.In accompanying drawing:
Fig. 1 is the schematic diagram of satellite video conference system according to an embodiment of the invention;
Fig. 2 is the schematic diagram of the method for satellite video meeting according to an embodiment of the invention;
Fig. 3 is the schematic diagram of part steps in the method for Fig. 2 Satellite video conference;
Fig. 4 is the schematic diagram of the method for satellite video meeting according to another embodiment of the present invention.
Embodiment
Fig. 1 is the schematic diagram of satellite video conference system according to an embodiment of the invention.The satellite video conference system of the present embodiment comprises main meeting-place system and multiple sub-venue system, and main meeting-place system is communicated by satellite delivery system 30 with multiple sub-venue system.
Main meeting-place system comprises main meeting-place video processing component and the first input-output equipment 11, first input-output equipment 11 and main meeting-place video processing component data cube computation, first input-output equipment 11 carries out the media information of acquisition main meeting-place and sends to main meeting-place video processing component, and the media information, main meeting-place video processing component and satellite delivery system 30 transfer of data that receive from main meeting-place video processing component.And main meeting-place system also comprises satellite bandwidth administrative unit, satellite bandwidth administrative unit is used for according to the band data of satellite and predetermined priority policy, determine that satellite passes on the sequencing of media information of sub-venue feedback, can transfer sub-venue and main meeting-place media-comunication like this.
Sub-venue system comprises sub-venue video processing component and the second input-output equipment 21, second input-output equipment 21 and sub-venue video processing component data cube computation, second input-output equipment 21 carries out the media information of acquisition sub-venue and sends to sub-venue video processing component, and the media information, sub-venue video processing component and satellite delivery system 30 transfer of data that receive from sub-venue video processing component.
For satellite video conference system, it is identical with ordinary video conference system in code encoding/decoding mode, video and audio process etc., but because the transmission means of satellite delivery system and terrestrial transmission also exist very large difference, satellite delivery system wide coverage, transmission rate is high, fail safe good and cost performance is high.Simultaneously, the satellite bandwidth administrative unit of main meeting-place, can according to the amount of bandwidth of satellite, the media information of sub-venue feedback and main meeting-place is selected to carry out alternately, such selection can utilize the maximum bandwidth of satellite to carry out transmission at a high speed, ensure that the high request of conference system to image sharpness, sound articulation etc.
Meanwhile, satellite video conference system also has the following advantages:
1 wide coverage, saves running cost
During satellite video conference system is specially adapted to, long-distance transmissions, have and cover on a large scale, by the feature of the restriction of region, landform and terrestrial broadcast networks, terrestrial communication networks.And communications cost and range-independence, distance advantage far away is more obvious, can make full use of Internet resources, saves operating cost.
2 transfer rates are high, high stability
This system adopts DVB broadcast and IP data double-way to transmit the advanced technology combined, support video standards, can carry out the transmission of mass file (speech, data, video image etc.), having more high definition, is high-speed datacasting system.This system also has high level security and stability.
3 transmission meanss are flexible
Can provide unidirectional, two-way satellite communication, provide multiple business service, and have extremely strong autgmentability and retractility, bandwidth expansion is simple, and web construction and resettlement are flexibly, conveniently.Satellite video conference system, by being structured in the transmission platform of " in the air ", can transmitting interactively video information very neatly, have more the performance advantage that ground network is incomparable in the video conference of medium and long distance.Satellite video conference system can be widely used in the industry-by-industries such as government, finance, the energy, traffic, medical treatment, education, and typical field of application comprises broadcast conference, corporate training and comprehensive multimedia programming etc.
Further preferably, see Fig. 1, main meeting-place video processing component comprises the first satellite communication end 12, multipoint controller 13 and the first DTU (Data Transfer unit) 14, first satellite communication end 12 and satellite delivery system 30 data cube computation, multipoint controller 13 is electrically connected with the first satellite communication end 12, first DTU (Data Transfer unit) 14 is electrically connected with multipoint controller 13, the first DTU (Data Transfer unit) 14 and multipoint controller 13 media information mutually.Sub-venue video processing component comprises the second satellite communication end 22 and the second DTU (Data Transfer unit) 23, second satellite communication end 22 and satellite delivery system 30 data cube computation, second DTU (Data Transfer unit) 23 is electrically connected with the second satellite communication end 22, the second DTU (Data Transfer unit) 23 and the second satellite communication end 22 media information mutually.
First satellite communication end 12 and the second satellite communication end 22 are the reception transmitting apparatus carrying out with satellite transmitting.First DTU (Data Transfer unit) 14 and the second DTU (Data Transfer unit) 23 include the multimedia signal processing machine of codec, and codec is connected with Received signal strength with satellite data and decodes, or transmit after being encoded by media information.
Multipoint controller 13, i.e. MCU, be only arranged on main meeting-place, and it is the key equipment of video conferencing system, and its major function switches video, voice and data-signal.Such as it can be switched to all meeting-place the picture signal being sent to MCU meeting-place spokesman.For voice signal, if there is several speech simultaneously, mixed processing can be carried out to them, select the highest audio signal, be switched to other meeting-place.Multipoint controller 13 comprises: network interface unit, Call Control Unit, multiplexed unit, demultiplexing unit, audio process, data processor, control processor, key handling distributor and call control processor.In addition, multipoint controller 13 also starts the bandwidth of the number of meeting point, digital communication, the control model of meeting, system and failure diagnosis parameter etc. is intervened and arranges.
In order to make satellite video conference system be equipped with high-level video effect, so the first input-output equipment 11 and the second input-output equipment 21 include chromatic colour picture monitor, sound system, video camera, video tape recorder and display.
Satellite video conference system based on the present embodiment has broadband, Mulit-point Connection, real-time continuous transmission, the feature such as at times, this system makes full use of the broadcast of satellite communication, the characteristic such as bandwidth is adjustable, frequency band is multiplexing, directly connect, make video conferencing system both reliable and stable, make full use of transmission bandwidth again, greatly reduce the operating cost of video conference.Transmit the difference of demand according to user, three kinds of networking plans can be adopted, meet users on diversity:
(1) broadcast mode
The video conferencing of broadcast mode is multicast.Under normal circumstances, send out the main meeting-place of station for video conferencing, receiving station is sub-venue.But and not necessarily is the main meeting-place of satellite system, a station also can be one in each sub-venue.This network construction form can farthest save satellite communication bandwidth resources, saves the multipoint control unit equipment in TV conference system, not only on leased satellite channel, greatly reduces rent, and save original equipment cost.
(2) interactive mode
In this networking model, all meeting points realize the Interactive function of full duplex completely.In such a mode, can interaction real-time and communication between each point, really reach the synergetic office work between the user of different location.Interactive mode overcomes the obstruction of Time and place, user is known from experience superiority that " face-to-face " have a meeting.
(3) aggregative model
This pattern forms by researching and developing on the basis taking into full account user's request, has the networking structure of broadcast mode and interactive mode concurrently, is also preferred networking model.The feature having satellite network extensively to cover on the one hand, according to the situation of some point, can set up two-way video conferencing, completes interactive television meeting, and avoid fund input high in interactive mode simultaneously.Specifically, its Heterosis exists: the fact of all meeting-place is all uploaded to the main meeting-place with multipoint controller, is controlled the camera angle of all sub-venues, and can arbitrary decision by which sub-venue be talked by main meeting-place.Or according to band data and the predetermined priority policy of satellite, determine to pass on the media information of which sub-venue to main meeting-place.So both there will not be phenomenon disorder in interactive mode, greatly save taking satellite channel again.Also combined with the studio adopted when carrying out video signal process in TV programme by MCU, make image more clear, manifestation mode is abundanter.
Present invention also offers a kind of embodiment of method of satellite video meeting, see Fig. 2, use the satellite video conference system of above-described embodiment, this method comprises:
S10: the media information of main meeting-place is sent to multiple sub-venue by satellite delivery system;
S20: whether detect sub-venue to main meeting-place feedback media information;
S31: when sub-venue has feedback media information, the media information that sub-venue feeds back is sent to main meeting-place by satellite delivery system;
S32: when sub-venue does not feed back media information, only transmits the media information of main meeting-place to multiple sub-venue.
The method of the present embodiment, consider the limited bandwidth of satellite, so whether setting feeds back media information through detecting sub-venue, be optimized the transmission of media information, the sub-venue that this avoid some does not need media information to feed back takies the problem of resource, is applied to by limited bandwidth maximization in the resource of needs transmission.Compared to the mode of being carried out media information in prior art by the Internet, can ensure that the video conference of high definition, high voice quality is carried out in the meeting-place of video conference.
Carry out in video conference process actual, each sub-venue there will be different demands, and such as: the meeting-place in certain sub-venue being VIP, its sub-venue needs preferentially to transmit; Some other sub-venues may not be the key personnels participated in a conference, and be only carry out personnel such as auditing, its relative importance value is unimportant.So the method for the present embodiment, demarcates priority to sub-venue in advance, and selects the order of media information according to the height of priority.
Particularly, in this method, see Fig. 3, also comprise after step S31:
S40: the media information fed back according to multiple sub-venue, the sub-venue that one of them priority level is the highest is selected according to the priority of above-mentioned sub-venue, the media information transmission fed back is to main meeting-place, other sub-venues in multiple according to priority order from high to low, one by one by its media information transmission to main meeting-place.
The preset rules of setting priority can have multiple, method in the present embodiment is undertaken setting this priority by setting different Permission Levels to sub-venue, as, meeting important persons at sub-venue can be arranged high-grade Permission Levels, hearing people or other meetings personnel are arranged to lower Permission Levels, and the sub-venue of high-grade claim grade preferentially carries out media information.Particularly, set priority in this method to comprise the following steps:
Multiple sub-venue is set different Permission Levels from high to low.
The order of priority is determined from high to low according to the Permission Levels of sub-venue.
See Fig. 4, show another embodiment of the method for satellite video meeting, the step of the present embodiment and S10, S20, S31, S32 of above-mentioned steps, it should be noted that, S32 step does not illustrate at Fig. 4.Further preferably, after step S31, this method also comprises:
S51: the satellite transmission bandwidth that the media information detecting multiple sub-venue feedback takies;
S52: when the satellite transmission bandwidth that the media information that multiple sub-venue feeds back takies is less than predetermined value, be then simultaneously transferred to main meeting-place;
S53: when the satellite transmission band that the media information that multiple sub-venue feeds back takies is wider than predetermined value, then continue the satellite transmission bandwidth that this media information of detection takies, until it is less than predetermined value after reducing the media information of one of them sub-venue feedback.
Above-mentioned steps is such as: when the media information occupancy of multiple sub-venue is less than maximum (may also be predetermined value) of bandwidth, even if due to the media information of multiple sub-venue is carried out transmitting also can not causing the problems such as not smooth, so can directly be transmitted by the media information of multiple sub-venue simultaneously simultaneously.Or, when if the media information occupancy of four sub-venues has been greater than maximum or the preset value of bandwidth, transmission is simultaneously certain to cause the impaired slack problem of image quality, so after selecting the media information in one of them meeting-place of minimizing, carry out step S51 again, if the media information occupancy of three sub-venues is still greater than maximum value bandwidth or preset value, then continue to reduce sub-venue quantity, until be less than maximum or the predetermined value of bandwidth.
In other examples, also setting priority can be carried out according to the time of each sub-venue feedback media information, feedback moment sub-venue more early then preferentially transmits, feedback moment more late sub-venue transmits one by one according to respective feedback time, also can ensure effectively to utilize bandwidth, ensure the high-quality transmission of meeting.Particularly, the method for other embodiments comprises step: the feedback moment detecting multiple sub-venue, according to feedback moment arrangement sequencing; According to the order of the feedback time sequencing determination priority of sub-venue.
So far, those skilled in the art will recognize that, although multiple exemplary embodiment of the present invention is illustrate and described herein detailed, but, without departing from the spirit and scope of the present invention, still can directly determine or derive other modification many or amendment of meeting the principle of the invention according to content disclosed by the invention.Therefore, scope of the present invention should be understood and regard as and cover all these other modification or amendments.
Claims (10)
1. a satellite video conference system, is characterized in that, comprises main meeting-place system and multiple sub-venue system, and described main meeting-place system is communicated by satellite delivery system (30) with multiple described sub-venue system, wherein,
Described main meeting-place system comprises main meeting-place video processing component and the first input-output equipment (11), described first input-output equipment (11) and described main meeting-place video processing component data cube computation, described first input-output equipment (11) is carried out the media information of acquisition main meeting-place and is sent to described main meeting-place video processing component, and the media information received from described main meeting-place video processing component, described main meeting-place video processing component and described satellite delivery system (30) transfer of data;
Described main meeting-place system also comprises satellite bandwidth administrative unit, for: according to band data and the predetermined priority policy of satellite, determine that satellite passes on the sequencing of media information of described sub-venue feedback;
Described sub-venue system comprises sub-venue video processing component and the second input-output equipment (21), described second input-output equipment (21) and described sub-venue video processing component data cube computation, described second input-output equipment (21) is carried out the media information of acquisition sub-venue and is sent to described sub-venue video processing component, and the media information, described sub-venue video processing component and described satellite delivery system (30) transfer of data that receive from described sub-venue video processing component.
2. satellite video conference system according to claim 1, is characterized in that, described main meeting-place video processing component comprises:
First satellite communication end (12), with described satellite delivery system (30) data cube computation;
Multipoint controller (13), is electrically connected with described first satellite communication end (12);
First DTU (Data Transfer unit) (14), is electrically connected with described multipoint controller (13), described first DTU (Data Transfer unit) (14) and described multipoint controller (13) media information mutually.
3. satellite video conference system according to claim 2, is characterized in that, described sub-venue video processing component comprises:
Second satellite communication end (22), with described satellite delivery system (30) data cube computation;
Second DTU (Data Transfer unit) (23), is electrically connected with described second satellite communication end (22), the second DTU (Data Transfer unit) (23) and described second satellite communication end (22) media information mutually.
4. satellite video conference system according to claim 3, it is characterized in that, described first DTU (Data Transfer unit) (14) and described second DTU (Data Transfer unit) (23) include the multimedia signal processing machine of codec, described codec is connected with Received signal strength with described satellite data and decodes, or transmits after being encoded by media information.
5. satellite video conference system according to claim 2, it is characterized in that, described multipoint controller (13) comprising: network interface unit, Call Control Unit, multiplexed unit, demultiplexing unit, audio process, data processor, control processor, key handling distributor and call control processor;
Described first input-output equipment (11) and described second input-output equipment (21) include: colour picture monitor, sound system, video camera, video tape recorder and display.
6. a method for satellite video meeting, uses the satellite video conference system according to any one of claim 1 to 5, it is characterized in that, comprising:
The media information of main meeting-place is sent to multiple sub-venue by satellite delivery system;
Whether detect described sub-venue to described main meeting-place feedback media information;
When described sub-venue has feedback media information, the media information fed back by described sub-venue sends to described main meeting-place by satellite delivery system;
When described sub-venue does not feed back media information, only transmit the media information of described main meeting-place to multiple described sub-venue.
7. the method for satellite video meeting according to claim 6, is characterized in that,
According to the media information of multiple described sub-venue feedback, the described sub-venue that one of them priority level is the highest is selected according to the priority of above-mentioned sub-venue, the media information transmission fed back gives described main meeting-place, its media information transmission, according to priority order from high to low, is given described main meeting-place by sub-venue one by one described in other in multiple.
8. the method for satellite video meeting according to claim 7, is characterized in that,
Multiple described sub-venue is set different Permission Levels from high to low;
The order of described priority is determined from high to low according to the Permission Levels of described sub-venue.
9. the method for satellite video meeting according to claim 7, is characterized in that,
Detect the feedback moment of multiple described sub-venue, according to described feedback moment arrangement sequencing;
The order of described priority is determined according to the feedback time sequencing of described sub-venue.
10. the method for satellite video meeting according to claim 6, is characterized in that,
The satellite transmission bandwidth that the media information detecting multiple described sub-venue feedback takies;
When the satellite transmission bandwidth that the media information of multiple described sub-venue feedback takies is less than predetermined value, be then transferred to described main meeting-place simultaneously;
When the satellite transmission band that the media information of multiple described sub-venue feedback takies is wider than predetermined value, then continue the satellite transmission bandwidth that this media information of detection takies after reducing the media information of sub-venue feedback described in one of them, until it is less than predetermined value.
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