CN100512421C - Resource scheduling method for implementing image processing in conference telephone system - Google Patents
Resource scheduling method for implementing image processing in conference telephone system Download PDFInfo
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- CN100512421C CN100512421C CNB200510090204XA CN200510090204A CN100512421C CN 100512421 C CN100512421 C CN 100512421C CN B200510090204X A CNB200510090204X A CN B200510090204XA CN 200510090204 A CN200510090204 A CN 200510090204A CN 100512421 C CN100512421 C CN 100512421C
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Abstract
The invention discloses a resource scheduling method for realizing image process in a television meeting system, which includes the following steps: the system is initialized to set the current status of each processing chip in the system to be idle. The system determines the demanded processing chips for the meeting through the detection about the video-rate and multi-images of the current terminals in the meeting. The system judges whether the number of the current idle media processing chips is greater than that demanded, if it is, the system changes the idle status of the demanded ones to be the ID for the meeting, if not, it feedbacks the related information to show the lack of current resource and refuses to hold the meeting. The above steps are repeated until the resource scheduling of a number of meetings is completed.
Description
Technical field
The present invention relates to TV conference system, especially relate to a kind of resource regulating method of in TV conference system, realizing image processing.
Background technology
In TV conference system, the terminal that inserts meeting all needs to pass through MCU (MultipointControl Unit, multipoint control unit) carries out alternately, MCU mainly comprises MC (MultipointController, multipoint controller) and MP (Multipoint Processor, multipoint processor) two big functional entitys, wherein, MC is in order to provide the control of multipoint conference, and MP then provides focusing on of multipoint conference sound intermediate frequency, video and data flow.
As everyone knows, the main method of the acoustic processing that accesses terminal among the MCU is an audio mixing, can realize by APU among the MP (voice coder/codec processing unit) and MIX (voice mixing processing unit).But, handle for video image, but only be confined to simple process such as broadcast of images and image switching, the MCU product is only supported many pictures of single group meeting in the prior art, and the hardware system that adopts mostly is the PC industrial computer, can't satisfy requirements such as the multimedia carrier-class can be runed, high stability.
At present, maturation along with high-performance image process chip technology, progressively adopt the high-performance image process chip (generally to adopt digital signal processing chip in the MCU system, abbreviate dsp chip as) realize the image blend (many pictures) of a plurality of terminals and the coupling of picture format and speed, but the disposal ability of single dsp chip is limited, so need a plurality of dsp chip parallel processings, yet, owing to lack resource regulating method flexibly and effectively, promptly how a plurality of dsp chips in the system are dispatched, make it to cooperatively interact and realize the image processing of many picture two speed of many group meetings, thereby cause adopting the technical scheme of a plurality of media processing chips to be difficult to carry out.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of resource regulating method of realizing image processing in TV conference system, adopt this method can be flexibly dispatching patcher resource effectively, make that a plurality of media processing chips can move jointly in the system, thereby realize the image processing of many picture two speed of many group meetings.
In order to solve the problems of the technologies described above, the invention provides a kind of resource regulating method of in TV conference system, realizing image processing, comprise the steps:
(a) system initialization, and the current operating position of each media processing chip is set to idle condition in the system;
(b) system detects first video rate and second video rate of each terminal of working as last group of meeting of request video resource, and according to detected video rate with describedly obtain holding described media processing chip number when last group of required many frame numbers of meeting when last group of meeting needs, described first video rate is system's detected first video rate when detecting each terminal video rate when last group of meeting, and the described second video rate detected video rate different with first video rate that be system;
(c) be in the number of the media processing chip of idle condition in the computing system, whether resulting media processing chip number of holding current these group meeting needs is less than or equal to the number that is in the media processing chip of idle condition in the current system in the determining step (b), if be less than or equal to, execution in step (d), otherwise execution in step (e);
(d) be set to described sign by the described current operating position of working as each media processing chip of last group of meeting use when last group of meeting, and calculate and to hold after the active conference number of the remaining media processing chip that is in idle condition in the system, execution in step (f);
(e) return corresponding message, the current video inadequate resource is described, refusal is held described when last group of meeting;
(f) system carries out scheduling of resource to next group meeting of request video resource, and repeating step (b) is finished until the scheduling of resource of the required many groups meeting held simultaneously of system to (e).
Further, the present invention also has following characteristics: when system initialization, construct a three-dimensional array table based on many frame numbers, first video rate and second video rate that is used for scheduling resource, and store described three-dimensional array table.
Further, the present invention also has following characteristics: when system detects each terminal video rate when last group of meeting, detected first video rate is made as first video rate, the detected video rate different with first video rate is made as second video rate, if detect mutually different video rate more than three or three, then return the video resource deficiency, the message that database configuration is made mistakes.
Further, the present invention also has following characteristics: system is according to detected first video rate, second video rate and work as last group of many frame numbers that meeting is required, inquires about described three-dimensional array table and obtains holding the media processing chip number that needs when last group of meeting.
Further, the present invention also has following characteristics: construct the video decoding capability that the described decisive factor that is used for the three-dimensional array table of scheduling resource comprises media processing chip, according to calculating the required media processing chip number of corresponding video decoding by the decoding way of many frame numbers decisions and the video decoding capability of media processing chip.
Further, the present invention also has following characteristics: construct the video encoding capability that the described decisive factor that is used for the three-dimensional array table of scheduling resource comprises media processing chip, according to calculating the required media processing chip number of corresponding video coding by the coding way of the terminal species number of different video speed decision and the video encoding capability of media processing chip.
Further, the present invention also has following characteristics: construct the described decisive factor that is used for the three-dimensional array table of scheduling resource and comprise video scaling filter factor and video composite coefficient.
Further, the present invention also has following characteristics: the described three-dimensional array table that is used for scheduling resource can suitably be adjusted according to the variation of software and hardware capacity factor.
Further, the present invention also has following characteristics: described video rate comprises the information of video format and video code rate.
Further, the present invention also has following characteristics: after one group meeting adjourned, system closing should be organized meeting, was set to idle condition by this current operating position of organizing each media processing chip of meeting use.
Compared with prior art, the present invention has the following advantages:
A, the present invention is according to the video rate of working as last group of each terminal of meeting of detected request resource with when last group of many frame numbers that meeting is required, obtain holding the media processing chip number that needs when last group of meeting, and relatively with the media processing chip number that is in idle condition in itself and the system, judge system resource and whether satisfy the needs of holding when last group of meeting, then distribute corresponding resource if satisfy, and be provided for sign when last group of meeting, otherwise refusal is held when last group of meeting, thereby can be flexibly dispatching patcher resource effectively, make that a plurality of media processing chips can move jointly in the system, realize the image processing of many picture two speed of many group meetings;
The three-dimensional array table that is used for scheduling resource among B, the present invention can suitably be adjusted according to the variation of software and hardware capacity factor, so have good autgmentability.
Description of drawings
Fig. 1 is the common pattern and the big or small picture layout situation schematic diagram of many pictures in the TV conference system;
Fig. 2 is the three-dimensional array table under 1 picture, 2 rate behaviors among the present invention;
Fig. 3 is the three-dimensional array table under 2 pictures, 2 rate behaviors among the present invention;
Fig. 4 is the three-dimensional array table under 3 pictures, 2 rate behaviors among the present invention;
Fig. 5 is the three-dimensional array table under 4 pictures, 2 rate behaviors among the present invention;
Fig. 6 is the three-dimensional array table under 4+1 picture 2 rate behaviors among the present invention;
Fig. 7 is the three-dimensional array table under 5+1 picture 2 rate behaviors among the present invention;
Fig. 8 is the three-dimensional array table under 9 pictures, 2 rate behaviors among the present invention;
Fig. 9 is the three-dimensional array table under 16 pictures, 2 rate behaviors among the present invention;
Figure 10 is the video decoding capability parameter list of dsp chip in the embodiments of the invention;
Figure 11 is the video encoding capability parameter list of dsp chip in the embodiments of the invention;
Figure 12 is the flow chart that active conference is carried out scheduling of resource according to embodiments of the invention;
Figure 13 closes the flow chart that meeting discharges resource according to embodiments of the invention;
Figure 14 is according to embodiments of the invention, at the hardware line schematic diagram that adopts chip interconnect under 3 Media Processor situations.
Embodiment
For understanding the present invention in depth, the present invention is described in detail below in conjunction with drawings and the specific embodiments.
Solution route of the present invention can be by the video rate of detected each terminal and the required many frame numbers of meeting of request resource, calculate the number of holding the required media processing chip of active conference in real time according to the coding/decoding capability of media processing chip and relevant parameter and finish scheduling system resource, also can set up one earlier based on many pictures, the three-dimensional array table of first video rate and second video rate, then according to the concrete condition of the active conference of request resource (as many frame numbers of needs, the video rate of each terminal etc.) inquire about this three-dimensional array table, obtain holding the number of the required media processing chip of active conference, then by with system in available resources compare, judge whether can hold active conference, thereby finish scheduling system resource.Owing to adopt the method for three-dimensional array table more user-friendly, therefore following embodiment will be described in detail at a kind of solution route in back.Yet, for preceding a kind of solution route, can be with reference to the generation method (being the assignment method of number of resources in the three-dimensional array table) or the rule of three-dimensional array table, carry out corresponding program by hardware and calculate the required resource of holding a meeting in real time, then by with system in available resources compare, judge whether can hold active conference, thereby finish scheduling system resource.
In the embodiments of the invention, because need set up a three-dimensional array table that is used for scheduling resource based on many frame numbers, first video rate and second video rate, and system needs this three-dimensional array table is inquired about in running, so need consider situation as much as possible in advance, the number of supposing media processing chip is n, and the media processing chip of employing is dsp chip (n 〉=2); The numbers of many groups meeting are assumed to i group (i 〉=2); Many pictures are assumed to j picture and mix (1=＜j＜=16), in the TV conference system the common pattern of many pictures and big or small picture layout situation as shown in Figure 1, from up to down, represent 1 picture from left to right respectively, 2 pictures, 2+1 picture (representing 2 little pictures to add 1 big picture), 4 pictures, 4+1 picture (representing 4 little pictures to add 1 big picture), 5+1 picture (representing 5 little pictures to add 1 big picture), 4+3 picture (representing 4 little pictures to add 3 big pictures), 7+1 picture (representing 7 little pictures to add 1 big picture), 9 pictures, 8+2 picture (representing 8 little pictures to add 2 big pictures), 12+1 picture (representing 12 little pictures to add 1 big picture), 12 kinds in 16 pictures etc.
In the present invention, three of the three-dimensional array table variablees refer to many frame numbers, first video rate and second video rate respectively.So, for the ease of setting up and inquiry, need carry out many frame numbers abstract, for example the element value of the abstract correspondence of 1 picture is 0, the element value of the abstract correspondence of 2 pictures is 1, the element value of the abstract correspondence of 3 pictures is 2, the element value of the abstract correspondence of 4 pictures is 3, the element value of the abstract correspondence of 4+1 picture is 4, and the element value of the abstract correspondence of 5+1 picture is that the element value of the abstract correspondence of 5,9 pictures is 6, the element value of the abstract correspondence of 16 pictures is 7 etc., totally 8 kinds, and 7+1,4+3 be according to 9 picture computational resources, 8+2,12+1 are according to 16 picture computational resources.Therefore, the variable that relates to many frame numbers in the three-dimensional array table of setting up in the present embodiment is 8, and promptly having 8 is the array list of variable with first video rate and second video rate, and is extremely shown in Figure 9 as Fig. 2.
In addition; Also need also to carry out the video rate of each terminal of meeting highly abstract; Video rate comprises two parts information of video format and video code rate; The system that is defined as first video rate detects detected first video rate when each terminal video rate of last group of meeting; And second video rate is defined as the video rate different from first video rate that system detects; If detect mutually different video rate more than three or three; Then system is judged to be customer data base configuration and makes mistakes
In the present embodiment, need carry out abstract at the video format of different video speed, for example for first video rate, the element value of the abstract correspondence of video format H263_QCIF is 0, the element value of the abstract correspondence of H263_CIF is 1, and the element value of the abstract correspondence of H263_4CIF is 2, and the element value of the abstract correspondence of H264_CIF is 3, as Fig. 2 to H263_QCIF1 (0), H263_CIF1 (1), H263_4CIF1 (2), H264_CIF1 (3) shown in Figure 9, totally 4 kinds of video rates.And for second video rate, the element value that does not have the abstract correspondence of situation of second video rate is 0, the element value of the abstract correspondence of video format H263_QCIF is 1, the element value of the abstract correspondence of H263_CIF is 2, the element value of the abstract correspondence of H263_4CIF is 3, the element value of the abstract correspondence of H264_CIF is 4, as Fig. 2 to nothing second video rate (0), H263_QCIF2 (1), H263_CIF2 (2), H263_4CIF2 (3), H264_CIF2 (4) shown in Figure 9, totally 5 kinds of video rates.
Under current technical conditions, dsp chip is also inequality to the disposal ability of different code checks and video format, present embodiment fully takes into account current 4 kinds of video formats commonly used, and current video code rate commonly used (the access video code rate of conference terminal is generally below 1M, commonly used is 384kbps and 768kbps), as shown in figure 10, its form assign representation a slice dsp chip can be handled the image data decoding of how many road conference terminals, for example, below video code rate 1M and video format be the situation of H263_QCIF, can the decode view data of 8 road conference terminals of a slice dsp chip; As shown in figure 11, its form assign representation a slice dsp chip can be handled the coded image data of how many road conference terminals, for example, below video code rate 1M and video format be the situation of H263_QCIF, can the encode view data of 4 road conference terminals of a slice dsp chip, other assignment among Figure 10 and Figure 11 in the form by that analogy.
For the assignment in the form among Fig. 2 to Fig. 9 (promptly representing the dsp chip number), need calculate with reference to the video decode and the code capacity parameter list of the dsp chip shown in Figure 10 and Figure 11, need to add suitable video scaling filter factor and video composite coefficient in addition, concrete grammar is as described below:
At first, determine the decoding way according to many frame numbers, for example, 16 road H263_CIF 384kbps or 16 road H263_QCIF 768kbps, or the mixing meeting between them, owing under many pictures situation, need the training in rotation of many pictures, should reserve maximum resource and could realize training in rotation, so the decoding way of resource estimation is as the criterion with 16 road H263_CIF 384kbps.
Secondly, determine the coding way according to the terminal species number of different video speed, top example needs 1 road H263_QCIF 768kbps and 1 road H263_CIF 384kbps coding.
Then, determine video scaling filter factor and video composite coefficient, in general span is between 0.3～0.5.
At last, according to above-mentioned several parameters, can calculate the assignment (promptly under the situation of above-mentioned many frame numbers, video rate, holding the dsp chip number that active conference needs) of respective element in the three-dimensional array table: 16 road H263_CIF 384kbps decoding need 16 * 1/8=2 sheet (wherein in the 1/8 dsp chip video decoding capability parameter list that is meant as shown in figure 10 with below the video code rate 1M and video format be the value of the corresponding element of situation of H263_CIF); 1 road H263_QCIF 768kbps and 1 road H263_CIF 384kbps coding need 1 * 1/4+1 * 1/4=0.5 sheet (in the video encoding capability parameter list that is meant dsp chip respectively for 2 1/4 wherein with below the video code rate 1M and video format be under the situation of H263_QCIF and with below the video code rate 1M and video format be the value of corresponding element under the situation of H263_CIF); Add 0.3 video scaling filter factor and video composite coefficient, need the 2+0.5+0.3=2.8 sheet altogether, 3 reliabilities of actual allocated with the raising running software, therefore in Fig. 9 (Fig. 9 is the three-dimensional array table under 16 pictures, 2 rate behaviors), video rate 1 (first video rate) is that H263_QCIF1 (0) and video rate 2 (second video rate is) the pairing element assignment of H263_CIF2 (2) are 3, or video rate 1 (first video rate) is that H263_CIF1 (1) and video rate 2 (second video rate is) the pairing element assignment of H263_QCIF2 (1) are 3.
According to above-mentioned method or rule, can finish the assignment of each array element among Fig. 2 to Fig. 9, thereby set up the described three-dimensional array table based on many frame numbers, first video rate and second video rate that is used for scheduling resource, promptly Fig. 2 to Fig. 9 lists the dsp chip number that 1 picture, 2 pictures, 2+1 picture, 4 pictures, 4+1 picture, 5+1 picture, 9 pictures, 16 pictures etc. are held a meeting required respectively under 2 rate behaviors.
Described three-dimensional array table can generate in advance, is loaded in the register of multipoint control unit (MCU) after the TV conference system operation, like this can be user-friendly.In addition, this three-dimensional array table can suitably be adjusted according to the variation (be the disposal ability of media processing chip, comprise hardware aspect and software aspect) of software and hardware capacity factor, therefore concrete good autgmentability.
Below in conjunction with Figure 12, further describe according to embodiments of the invention carry out the idiographic flow of scheduling of resource when last group of meeting: system initialization at first, foundation is used for the array Used[n of the current operating position of n media processing chip of expression system], and it is initialized as Used[n]=" 0xff0xff......0xff ", represent n media processing chip all to be in idle condition; And load the register of the three-dimensional array table that is used for scheduling resource of foundation in advance to MCU;
Step 110 is returned corresponding message, and the current video inadequate resource is described, refusal is held current the group meeting of request resource;
Step 111 finishes.
Wherein, the abstract assignment method of first video rate and second video rate is: terminals all in the meeting to request resource detect one by one, first terminal video rate is abstracted into a word type numeral, for example H263_CIF 384kbps is abstract is 0x0106, wherein high byte is represented code/decode format H263_CIF, low byte is represented code check 384kbps, and the array element assignment with first video rate is 1 simultaneously; Then left terminal is calculated its video rate value one by one, if 0x0106, represent identical with first terminal video rate value, otherwise calculate the value of its second video rate according to the video rate value, for example H263_4CIF 384kbps is 0x0206, and this moment, the array element assignment of second video rate was 3; This moment is if non-0x0106 and 0x0206 occur again, then because greater than two speed, and the video resource deficiency, expression user configuration database is made mistakes.
If need hold the meeting of i group simultaneously, system carries out scheduling of resource to next group meeting of request video resource, repeats above-mentioned steps shown in Figure 12, finishes until the scheduling of resource of the required many groups meeting held simultaneously of system.At this moment, hold the values of organizing the media processing chip of meeting needs more and should be less than or equal to n, i.e. a1+a2+...+ai＜=n.
Figure 13 closes the idiographic flow that meeting discharges resource according to embodiments of the invention, comprises the steps:
Step 201 is closed meeting, and Conference ID is ConfID;
Step 204 finishes.
Hardware line schematic diagram (triangle line) when the Media Processor number that Figure 14 signal is used when certain system is 3, when the Media Processor number of using when system is situations such as 4,5,6, the hardware line is respectively annular or diagonal angle lines such as quadrangle, pentagon, hexagon, for skilled person in the art, this should be conspicuous.
In sum, present embodiment is the dsp chip number that all many picture compositions of expecting in advance need to be made a Zhang San tie up array list, when needing many picture resources when holding a meeting, according to conference capability decision needs what dsp chips of tabling look-up, check that again can idle dsp chip number and combined situation thereof that current system is left decide the active conference application be allowed to hold.So analogize can holding of next group meeting, thereby the many pictures of MCU of realizing the meeting of many groups are handled.
This method flexible and convenient both was user-friendly to, and good reliability, had good autgmentability.
Claims (10)
1, a kind of resource regulating method of realizing image processing in TV conference system comprises the steps:
(a) system initialization, and the current operating position of each media processing chip is set to idle condition in the system;
(b) system detects first video rate and second video rate of each terminal of working as last group of meeting of request video resource, and according to detected video rate with describedly obtain holding described media processing chip number when last group of required many frame numbers of meeting when last group of meeting needs, described first video rate is system's detected first video rate when detecting each terminal video rate when last group of meeting, and the described second video rate detected video rate different with first video rate that be system;
(c) be in the number of the media processing chip of idle condition in the computing system, whether the resulting media processing chip number that needs when last group of meeting of holding is less than or equal to the number that is in the media processing chip of idle condition in the current system in the determining step (b), if be less than or equal to, execution in step (d), otherwise execution in step (e);
(d) be set to described sign by the described current operating position of working as each media processing chip of last group of meeting use when last group of meeting, and calculate and to hold after the active conference number of the remaining media processing chip that is in idle condition in the system, execution in step (f);
(e) return corresponding message, the current video inadequate resource is described, refusal is held described when last group of meeting;
(f) system carries out scheduling of resource to next group meeting of request video resource, and repeating step (b) is finished until the scheduling of resource of the required many groups meeting held simultaneously of system to (e).
2, the resource regulating method of in TV conference system, realizing image processing according to claim 1, it is characterized in that: when system initialization, construct a three-dimensional array table that is used for scheduling resource, and store described three-dimensional array table based on many frame numbers, first video rate and second video rate.
3, the resource regulating method of in TV conference system, realizing image processing according to claim 2, it is characterized in that: when system detects each terminal video rate when last group of meeting, detected first video rate is made as first video rate, the detected video rate different with first video rate is made as second video rate, if detect mutually different video rate more than three or three, then return the video resource deficiency, the message that database configuration is made mistakes.
4, the resource regulating method of in TV conference system, realizing image processing according to claim 3, it is characterized in that: system is according to detected first video rate, second video rate and work as last group of many frame numbers that meeting is required, inquires about described three-dimensional array table and obtains holding the media processing chip number that this group meeting needs.
5, the resource regulating method of in TV conference system, realizing image processing according to claim 2, it is characterized in that: construct the video decoding capability that the described decisive factor that is used for the three-dimensional array table of scheduling resource comprises media processing chip, according to calculating the required media processing chip number of corresponding video decoding by the decoding way of many frame numbers decisions and the video decoding capability of media processing chip.
6, the resource regulating method of in TV conference system, realizing image processing according to claim 5, it is characterized in that: construct the video encoding capability that the described decisive factor that is used for the three-dimensional array table of scheduling resource comprises media processing chip, according to calculating the required media processing chip number of corresponding video coding by the coding way of the terminal species number of different video speed decision and the video encoding capability of media processing chip.
7, the resource regulating method of realizing image processing in TV conference system according to claim 6 is characterized in that: construct the described decisive factor that is used for the three-dimensional array table of scheduling resource and comprise video scaling filter factor and video composite coefficient.
8, the resource regulating method of realizing image processing in TV conference system according to claim 7, it is characterized in that: the described three-dimensional array table that is used for scheduling resource can suitably be adjusted according to the variation of software and hardware capacity factor.
9, the resource regulating method of realizing image processing in TV conference system according to claim 1, it is characterized in that: described video rate comprises the information of video format and video code rate.
10, the resource regulating method of in TV conference system, realizing image processing according to claim 1, it is characterized in that: after one group meeting adjourned, system closing should be organized meeting, was set to idle condition by this current operating position of organizing each media processing chip of meeting use.
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| CN102118612B (en) * | 2009-12-31 | 2012-11-14 | Tcl集团股份有限公司 | Method and system for acquiring memory resource of audio and video hard decoding chip |
| CN107124575A (en) * | 2017-04-14 | 2017-09-01 | 苏州科达科技股份有限公司 | A kind of media processing method, device and media server |
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| MCU system software in video conference network. Yangzhen Zou, Changjia Chen.Proceedings of 1996 International Conference on Communication Technology,Vol.1 . 1996 |
| MCU system software in video conference network. Yangzhen Zou, Changjia Chen.Proceedings of 1996 International Conference on Communication Technology,Vol.1. 1996 * |
| On multipoint control units for videoconferencing. Willebeek-LeMair, M.H., Kandlur, D.D., Shae, Z.-Y.Proceedings of 19th Conference on Local Computer Networks. 1994 |
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| 视频会议系统中MCU的实现及其性能研究. 于波，陈平，张中兆.通信技术，第7期. 2001 |
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