CN101594442B - Method and system for video consultation - Google Patents
Method and system for video consultation Download PDFInfo
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- CN101594442B CN101594442B CN2009100407977A CN200910040797A CN101594442B CN 101594442 B CN101594442 B CN 101594442B CN 2009100407977 A CN2009100407977 A CN 2009100407977A CN 200910040797 A CN200910040797 A CN 200910040797A CN 101594442 B CN101594442 B CN 101594442B
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Abstract
The invention discloses a method for video consultation, which comprises the following steps: establishing voice conversation in a voice channel through at least two video terminals; and through the processing and control of a central processing unit and a field programmable gate array, dividing a part of bandwidth channel from the voice channel to send and receive video consultation information. Under the condition of not changing any requirement on a circuit switching network of digital relay networking, the method can divide a part of bandwidth on the voice channel established by two video parties, so that the video consultation information can be transparently transmitted in the circuit switching network so as to realize the video consultation function of the two video parties; and the method has the advantages of low cost, convenient maintenance and high reliability. The invention also discloses a system for the video consultation.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and system of video consultation.
Background technology
Video consultation is a process that realizes video communication, and the destination node that sends video process whereby can determine to receive the video capability and the relevant information of destination node before sending video flowing.Video consultation is generally finished at signaling channel.
Video terminal in the market is more and more abundanter, and function is also more and more stronger, mainly contains ISDN (Integrated Services Digital Network integrated services digital network) video terminal and IP video terminal.The ISDN video terminal uses ISDN D channel as signaling channel, is that basic agreement realizes the video consultation function with Q931.The IP video terminal is to use IP network as signaling channel, realizes the video consultation function with ICP/IP protocol as basic agreement.
The IP video consultation needs video server, also may need fire compartment wall etc. in addition, the cost height, install to dispose and safeguard complicated, in addition if video server breaks down or under fire, can influence the video consultation performance or cause the video consultation failure, thereby cause video to set up, reliability is poor.
ISDN D channel video consultation need be revised the Q931 agreement of ISDN, only comprise that the relevant device of the terminal equipment and the network equipment all revises the Q931 agreement of ISDN, could support the video consultation function, cause system extension difference and ease for use poor like this, and safeguard complicated.
In sum, the video consultation of prior art need be finished at signaling channel, and it has the shortcoming of operating cost height, installation and maintenance complexity, poor stability, reliability and system extension difference.
Summary of the invention
Be to solve the part of supplying of prior art, the object of the present invention is to provide that a kind of video consultation need not finished at signaling channel, operating cost is low, easy to maintenance, the method and system of the video consultation that fail safe, reliability and system extension are good.
The method of a kind of video consultation provided by the invention, this method comprises:
At least two video terminals are set up voice call at voice channel;
By the processing and the control of central processing unit and field programmable gate array, from voice channel, divide a part of bandwidth channel and carry out the transmission and the reception of video consultation information.
Preferably, the concrete steps of above-mentioned video consultation comprise: a, initialize communication interface unit; B, described central processing unit are controlled described field programmable gate array voice channel are connected to described communications interface unit; C, described communications interface unit are divided a part of bandwidth with voice channel and are carried out video consultation; D, in the part bandwidth that voice channel is divided, carry out the transmission and the reception of video consultation signal.
Preferably, the step of the receiver, video of video terminal described in above-mentioned steps d negotiation signal specifically comprises: d01, described external interface receive the video consultation signal that other video terminal external interfaces send, and send it to field programmable gate array in the part bandwidth of voice channel; After d02, the field programmable gate array receiver, video negotiation signal, from a plurality of video consultation signals, need to select the video consultation signal of transmission, in the part bandwidth of voice channel, send it to communications interface unit; D03, communications interface unit by HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal, and send the video consultation signal that receives to central processing unit with the signal behind the decompress(ion); D04, central processing unit connect the video consultation signal behind the processing decompress(ion).
Preferably, the step of central processing unit transmission video consultation signal specifically comprises among the above-mentioned steps d: d11, central processing unit send the video consultation signal; After d12, the communications interface unit receiver, video negotiation signal, it is packaged into HDLC (advanced signal controlling links) protocol signal form, the video consultation signal after will packing in the part bandwidth of voice channel sends to field programmable gate array; D13, field programmable gate array send to external interface with the video consultation signal that receives; After d14, the external interface receiver, video negotiation signal, send it to the external interface of voice call corresponding video terminal.
Preferably, above-mentioned voice channel is a time multiplexing circuit.
Preferably, the bandwidth of above-mentioned voice channel is 64kbps, and the bandwidth that wherein is used for the video consultation channel is 8kbps.
Preferably, above-mentioned steps d also comprises the step of judging whether video consultation is finished; If: finish video consultation, start the video signal transmission of video terminal; If not: proceed video consultation.
The present invention also provides a kind of system of video consultation, comprises at least two video terminals, is used for voice signal and vision signal each other, and carries out the transmission and the reception of video consultation signal at voice channel;
Wherein, described video terminal comprises:
Central processing unit is used for voice channel is divided transmission and the reception that a part of bandwidth is carried out the video consultation signal, and the transmission and the reception of control field programmable gate array video consultation signal;
Field programmable gate array, be used to receive the control signal of central processing unit, voice channel is connected to central processing unit, from a plurality of video consultation signals, select to be transferred to the video consultation signal of central processing unit, in voice channel, transmit the video consultation signal between central processing unit and the external interface;
External interface is used for the video consultation signal between voice channel transmission field programmable gate array and other video terminal external interfaces.
Preferably, above-mentioned central processing unit specifically comprises:
Communications interface unit, be used for after the initialization unit initialization, dividing a part of bandwidth and carry out video consultation at voice channel, carry out the transmission of video consultation signal with field programmable gate array, and before sending the video consultation signal, it is packaged into HDLC (advanced signal controlling links) protocol signal form, after the receiver, video negotiation signal, presses HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal;
Initialization unit is used for after video terminal carries out voice call communications interface unit being carried out initialization;
Control unit is used for transmitting control signal to described control field programmable gate array, controls its video signal transmission, and receives the feedback signal from field programmable gate array;
Judging unit is used to judge whether end of transmission of video consultation signal;
Processing unit is used to send the video consultation signal and handles the video consultation signal that receives.
The present invention compares with prior art and has the following advantages: because after video terminal of the present invention sets up voice call by voice channel, divide a part of bandwidth from voice channel and carry out video consultation, can after setting up voice call on the circuit-switched network, carry out video consultation, promptly do not influencing call tone quality and Circuit Switching Network's digital junction is not being had under the prerequisite of special requirement, on the voice channel that the video both sides have set up, divide a part of bandwidth separately, form special-purpose circuit signalling path, realize video both sides' video consultation function and expanded signalling propagation function.Existing like this circuit-switched network can not done any change, also need not change the relaying signaling between the switch, need not additionally increase server, as long as can realize video consultation after terminal equipment is set up voice call, that is to say, this video consultation method can not changed any equipment on the circuit-switched network of digital junction networking, realize transparent transmission, network element is simple in structure, cost is low so the present invention has, easy to maintenance, reliability is high, system extension and the good advantage of ease for use.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of first embodiment of the method for a kind of video consultation provided by the invention;
Fig. 2 is the flow chart of second embodiment of the method for a kind of video consultation provided by the invention;
Fig. 3 is the flow chart of receiver, video negotiation signal in the method for a kind of video consultation provided by the invention;
Fig. 4 is the flow chart that sends the video consultation signal in the method for a kind of video consultation provided by the invention;
Fig. 5 is the principle framework schematic diagram of a kind of video consultation provided by the invention system;
Fig. 6 is the structural representation of a kind of video consultation provided by the invention system.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The schematic flow sheet of an embodiment of the method for a kind of video consultation provided by the invention, as shown in Figure 1.
The method of a kind of video consultation that the embodiment of the invention one provides comprise following concrete steps:
101, at least two video terminals are set up voice call at voice channel;
102,, from voice channel, divide a part of bandwidth channel and carry out the transmission and the reception of video consultation information by the processing and the control of central processing unit and field programmable gate array.
After video terminal is set up voice call by voice channel, divide a part of bandwidth from voice channel and carry out video consultation.This method can be carried out video consultation automatically after setting up voice call on the circuit-switched network, do not influencing call tone quality and Circuit Switching Network's digital junction is not being had under the prerequisite of special requirement, on the voice channel that the video both sides have set up, divide a part of bandwidth separately, form special-purpose circuit signalling path, realize video both sides' video consultation function and expanded signalling propagation function.So method of video consultation of the present invention, its switching network does not need to need as prior art to set up special signalling path transmission of video negotiation signal, the original voice transfer network of method that is video consultation of the present invention can not done any change, also need not change the relaying signaling between the switch, need not additionally increase server, as long as terminal equipment can be realized video consultation after setting up voice call, network element is simple in structure, cost is low so the present invention has, easy to maintenance, reliability is high, system extension and the good advantage of ease for use.
The schematic flow sheet of second embodiment of the method for a kind of video consultation provided by the invention, as shown in Figure 2, this method comprises the steps:
201, at least two video terminals are set up voice call at voice channel;
202, initialize communication interface unit;
203, described central processing unit is controlled described field programmable gate array voice channel is connected to described communications interface unit;
204, described communications interface unit is divided a part of bandwidth with voice channel and is carried out video consultation;
205, in the part bandwidth that voice channel is divided, carry out the transmission and the reception of video consultation signal;
206, whether the judgment unit judges video consultation is finished: if not, and execution in step (205); If, execution in step (207);
207, finish video consultation, start the video signal transmission of video terminal.
Particularly, voice channel can adopt time multiplexing circuit TDM according to actual needs, promptly realizes the transmission of multiple signals in a passage.The bandwidth of voice channel can be set to 64kbps, also can in conjunction with the configuration of software and hardware, wideer or narrower voice channel bandwidth be set according to actual needs.The bandwidth of video consultation channel can be set to 8kbps, and on the basis that does not influence conversation, the ratio 8kbps that the bandwidth of video consultation channel can be provided with as required is wideer; Under the situation that does not influence the video consultation signaling rate, the ratio 8kbps that the bandwidth of video consultation channel can be provided with as required is narrower.Communications interface unit can be serial communication controller SCC.
Said method is by the control and the processing of central processing unit and field programmable gate array, can after setting up voice call on the circuit-switched network, carry out video consultation automatically, do not influencing call tone quality and Circuit Switching Network's digital junction is not being had under the prerequisite of special requirement, on the voice channel that the video both sides have set up, divide a part of bandwidth separately, form special-purpose circuit signalling path, realize video both sides' video consultation function and expanded signalling propagation function.So method of video consultation of the present invention, its switching network does not need to need as prior art to set up special signalling path transmission of video negotiation signal, the original voice transfer network of method that is video consultation of the present invention can not done any change, also need not change the relaying signaling between the switch, need not additionally increase server, as long as terminal equipment can be realized video consultation after setting up voice call, network element is simple in structure, cost is low so the present invention has, easy to maintenance, reliability is high, system extension and the good advantage of ease for use.
As shown in Figure 3, the process of the step 204 receiver, video negotiation signal of embodiment two video consultation methods specifically comprises the steps:
301, described external interface receives the video consultation signal that other video terminal external interfaces send, and sends it to field programmable gate array in the part bandwidth of voice channel;
302, after the field programmable gate array receiver, video negotiation signal, from a plurality of video consultation signals, need to select the video consultation signal of transmission, in the part bandwidth of voice channel, send it to communications interface unit;
303, communications interface unit by HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal, and sends the video consultation signal that receives to central processing unit with the signal behind the decompress(ion);
304, central processing unit connects the video consultation signal of handling behind the decompress(ion).
Wherein, HDLC (High-Level Data Link Control) is transmission data, bit-oriented data link layer protocol, HDLC is based on serial communication controller SCC physical layer data is carried out the transmission and the control of data link layer in video terminal, can receive the data of time multiplexing circuit TDM or send data to time multiplexing circuit TDM passage by HDLC agreement central processor CPU.
As shown in Figure 4, the step 204 of embodiment two video consultation methods sends the process of video consultation signal, specifically comprises the steps:
401, central processing unit sends the video consultation signal;
402, after the communications interface unit receiver, video negotiation signal, it is packaged into HDLC (advanced signal controlling links) protocol signal form, the video consultation signal after will packing in the part bandwidth of voice channel sends to field programmable gate array;
403, field programmable gate array sends to external interface with the video consultation signal that receives;
404, after the external interface receiver, video negotiation signal, send it to the external interface of voice call corresponding video terminal.
Wherein, HDLC (High-Level Data Link Control) is transmission data, bit-oriented data link layer protocol, HDLC is based on serial communication controller SCC physical layer data is carried out the transmission and the control of data link layer in video terminal, can receive the data of time multiplexing circuit TDM or send data to time multiplexing circuit TDM passage by HDLC agreement central processor CPU.
As shown in Figure 5, a kind of video consultation system that the embodiment of the invention provides, comprising: video terminal 500 and video terminal 600 are used for voice signal and vision signal each other, and carry out the transmission and the reception of video consultation signal in voice channels.The number of video terminal is at least two, promptly can be two or more, and per two video terminals can pass through the voice channel transmission of speech signals.Owing to carry out must carrying out video consultation before the video signal transmission, promptly need before sending video signal flow, determine the video capability and the relevant information of video terminal, the video terminal both sides carry out the transmission of video consultation signal in the voice channel of having set up.Video terminal 600 and video terminal 500 mark off a part of bandwidth with voice channel and carry out the transmission and the reception of video consultation signal as the video consultation channel, after video consultation is intact, and the video channel transmission video signal.
Voice channel can adopt time multiplexing circuit TDM according to actual needs, promptly realizes the transmission of multiple signals in a passage.The bandwidth of voice channel can be set to 64kbps, also can in conjunction with the configuration of software and hardware, wideer or narrower voice channel bandwidth be set according to actual needs.The bandwidth of video consultation channel can be set to 8kbps, and on the basis that does not influence conversation, the ratio 8kbps that the bandwidth of video consultation channel can be provided with as required is wideer; Under the situation that does not influence the video consultation signaling rate, the ratio 8kbps that the bandwidth of video consultation channel can be provided with as required is narrower.The switching network that the video terminal both sides set up can be a circuit-switched network, also can be IP network.
Particularly, as shown in Figure 5, video terminal 500 specifically comprises:
Field programmable gate array 520 is used for the control signal by local bus reception central processing unit 510, and voice channel is connected to central processing unit 510.During video terminal 500 receiver, video negotiation signal, if a plurality of video terminals send the video consultation signal simultaneously to this video terminal, field programmable gate array 520 can play the effect of choosing switch, promptly chooses the video consultation signal that needs transmission or meet transmission conditions from a plurality of video consultation signals that external interface 530 receives and sends central processing unit 510 to.When video terminal 500 sends the video consultation signal, the negotiation signal that field programmable gate array 520 receives from central processing unit 510, and receive the control signal of central processing unit 510 by local bus, negotiation signal is sent to external interface 530, simultaneously, will send result and operation result and feed back to central processing unit 510 by local bus.
As shown in Figure 5, central processing unit 510 specifically comprises:
When voice channel adopted time multiplexing circuit TDM, the video consultation signal that central processing unit 510 sends needed earlier it to be packaged into HDLC (advanced signal controlling links) protocol signal form and could transmit in time multiplexing circuit; And processing unit 515 needs processing to press HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal.Certainly, as long as can realize above-mentioned functions, those skilled in the art also can adopt existing other circuit-modes as voice channel, also can adopt the form that can transmit data in this voice channel, reach other packing data of function of the present invention.
Judging unit 514 is used to judge whether end of transmission of video consultation signal; If do not dispose, continue video terminal 500 and proceed video consultation, if dispose, start the video signal transmission of video terminal 500.
When video terminal 500 sends video consultation information, the processing unit 515 of central processing unit 510 sends the video consultation signal, after the communications interface unit 511 receiver, video negotiation signal, it is packaged into HDLC (advanced signal controlling links) protocol signal form, and the video consultation signal after will packing sends it to field programmable gate array 520 in the video consultation channel of voice channel; After the field programmable gate array 520 receiver, video negotiation signal, and the control command that sends by control unit 513 sends it to external interface 530, and the result that will send feeds back to control unit 513 simultaneously; After the external interface 530 receiver, video negotiation signal, send it to the external interface 530 of corresponding voice call video terminal 500.
During video terminal 500 receiver, video negotiation informations, external interface 530 receives the video consultation signal from external interface 530 transmissions of multi-party video terminal, and it is sent to field programmable gate array 520 in the video channel of voice channel; Field programmable gate array 520 is therefrom chosen the video consultation signal that needs transmission or meet transmission conditions and is sent interface unit 511 to after receiving a plurality of video consultation signals; After the communications interface unit 511 receiver, video negotiation signal, it is pressed HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal, and send the processing unit 515 of central processing unit 510 to.
After video terminal 500 is set up voice call by voice channel, divide a part of bandwidth from voice channel and carry out video consultation, promptly can after setting up voice call on the circuit-switched network, carry out video consultation automatically, do not influencing call tone quality and Circuit Switching Network's digital junction is not being had under the prerequisite of special requirement, on the voice channel that the video both sides have set up, divide a part of bandwidth separately, form special-purpose circuit signalling path, realize video both sides' video consultation function and expanded signalling propagation function.So on the circuit-switched network of digital junction networking, do not change any equipment, circuit-switched network can not done any change, also need not change the relaying signaling between the switch, need not additionally increase server, as long as terminal equipment can be realized video consultation after setting up voice call, network element is simple in structure, cost is low so video consultation of the present invention system has, easy to maintenance, reliability is high, system extension and the good advantage of ease for use.
The above is a preferred implementation of the present invention; certainly can not limit the present invention's interest field with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvement and change, these improvement and change also are considered as protection scope of the present invention.
Claims (1)
1. the method for a video consultation is characterized in that, this method comprises:
At least two video terminals are set up voice call at voice channel;
By the processing and the control of central processing unit and field programmable gate array, from voice channel, divide a part of bandwidth channel and carry out the transmission and the reception of video consultation information;
The concrete steps of described video consultation comprise:
A, initialize communication interface unit;
B, described central processing unit are controlled described field programmable gate array voice channel are connected to described communications interface unit;
C, described communications interface unit are divided a part of bandwidth with voice channel and are carried out video consultation;
D, in the part bandwidth that voice channel is divided, carry out the transmission and the reception of video consultation signal;
Described steps d also comprises the step of judging whether video consultation is finished; If: finish video consultation, start the video signal transmission of video terminal; If not: proceed video consultation.
2, the method for video consultation according to claim 1 is characterized in that, the step of the negotiation signal of video terminal receiver, video described in the described steps d specifically comprises:
D01, external interface receive the video consultation signal that other video terminal external interfaces send, and send it to field programmable gate array in the part bandwidth of voice channel;
After d02, the field programmable gate array receiver, video negotiation signal, from a plurality of video consultation signals, need to select the video consultation signal of transmission, in the part bandwidth of voice channel, send it to communications interface unit;
D03, communications interface unit by HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal, and send the video consultation signal that receives to central processing unit with the signal behind the decompress(ion);
D04, central processing unit receive the video consultation signal behind the processing decompress(ion).
3, the method for video consultation according to claim 2 is characterized in that, the step of carrying out the transmission of video consultation signal in the described steps d in the part bandwidth that voice channel is divided specifically comprises:
D11, central processing unit send the video consultation signal;
After d12, the communications interface unit receiver, video negotiation signal, it is packaged into HDLC (advanced signal controlling links) protocol signal form, the video consultation signal after will packing in the part bandwidth of voice channel sends to field programmable gate array;
D13, field programmable gate array send to external interface with the video consultation signal that receives;
After d14, the external interface receiver, video negotiation signal, send it to the external interface of voice call corresponding video terminal.
4, the method for video consultation according to claim 3 is characterized in that, described voice channel is a time multiplexing circuit.
5, the method for video consultation according to claim 4 is characterized in that, the bandwidth of described voice channel is 64 kbps, and the bandwidth that wherein is used for the video consultation channel is 8kbps.
6, a kind of system of video consultation is characterized in that, comprising:
At least two video terminals are used for voice signal and vision signal each other, and carry out the transmission and the reception of video consultation signal at voice channel;
Wherein, described video terminal comprises:
Central processing unit is used for voice channel is divided transmission and the reception that a part of bandwidth is carried out the video consultation signal, and the transmission and the reception of control field programmable gate array video consultation signal;
Field programmable gate array, be used to receive the control signal of central processing unit, voice channel is connected to central processing unit, from a plurality of video consultation signals, select to be transferred to the video consultation signal of central processing unit, in voice channel, transmit the video consultation signal between central processing unit and the external interface;
External interface is used for the video consultation signal between voice channel transmission field programmable gate array and other video terminal external interfaces.
7, the system of video consultation according to claim 6 is characterized in that, described central processing unit specifically comprises:
Communications interface unit, be used for after the initialization unit initialization, dividing a part of bandwidth and carry out video consultation at voice channel, carry out the transmission of video consultation signal with field programmable gate array, and before sending the video consultation signal, it is packaged into HDLC (advanced signal controlling links) protocol signal form, after the receiver, video negotiation signal, presses HDLC (advanced signal controlling links) protocol format decompress(ion) video consultation signal;
Initialization unit is used for after video terminal carries out voice call communications interface unit being carried out initialization;
Control unit is used for transmitting control signal to described control field programmable gate array, controls its video signal transmission, and receives the feedback signal from field programmable gate array;
Judging unit is used to judge whether end of transmission of video consultation signal;
Processing unit is used to send the video consultation signal and handles the video consultation signal that receives.
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| CN2009100407977A CN101594442B (en) | 2009-07-03 | 2009-07-03 | Method and system for video consultation |
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| CN2009100407977A CN101594442B (en) | 2009-07-03 | 2009-07-03 | Method and system for video consultation |
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| CN1322095A (en) * | 1994-06-15 | 2001-11-14 | 夸尔柯姆股份有限公司 | Method for user service and rate consultation in mobile communication system |
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| CN1466383A (en) * | 2002-07-02 | 2004-01-07 | 深圳市中兴通讯股份有限公司 | Method and device for realizing large volume TV conference |
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Address after: 510663 Guangzhou science and Technology Development Zone, high tech Industrial Development Zone, Guangdong City, south of the first Cloud Road No. 16 Patentee after: GHT Co., Ltd. Address before: 510663 Guangzhou science and Technology Development Zone, high tech Industrial Development Zone, Guangdong City, south of the first Cloud Road No. 16 Patentee before: Guangzhou GHT Communication Co., Ltd. |