CN101990083A - Video conference signal processing system - Google Patents
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Abstract
The invention discloses a video conference signal processing system. The video conference signal processing system comprises a receiving end and a transmitting end. Output state information can be acquired through an original signal acquired by the transmitting end according to an output state of a video conference module of a monitoring receiving end, so that a corresponding encoding process can be performed to generate a video conference signal and save the system resource and transmission bandwidth.
Description
Technical field
The present invention relates to a kind of video conference signal processing system, particularly a kind of video conference signal processing system of saving resource for computer system and transmission bandwidth use.
Background technology
Progress along with image processing techniques and network transmission technology, make the mode of carrying out two or Multi-Party Conference by Internet video be accepted by masses widely, because Internet video can be carried out in unlimited time place, and more increased the instant image information of dialogue side compared with the phone liaison method, promoted the convenience on using significantly.
Internet video is carried out the software with associated video function by computer mostly and is transmitted the instant video data now, and video data can comprise view data and voice data two parts.But this type of software utmost point under executing state accounts for resource for computer system, and can occupy most bandwidth by the Network Transmission video data.Under or the situation that computer resource is not enough not satisfactory, be easy to make that received image or audio frequency are interrupted or postpone to have some setbacks, cause user's puzzlement when network state.Therefore how reducing video software shared system resource and network bandwidth use amount in implementation, to improve data transmission efficiency and to reduce influence to the user, is one to be worth the problem of research in fact.
Summary of the invention
Main purpose of the present invention is to provide a kind of video conference signal processing system of saving resource for computer system and transmission bandwidth use.
For reaching above-mentioned purpose, video conference signal processing system of the present invention comprises receiving terminal and transmitting terminal.Transmitting terminal comprises image acquiring apparatus and coding module, and image acquiring apparatus is in order to obtain primary signal, and coding module is in order to encode to primary signal, to produce the video conference signal.Receiving terminal comprises the video conference module, and in order to receive and the output video conference signal, wherein video conference module comprises monitoring module, in order to the signal output state of video conferencing monitoring module, to produce output state information.Wherein the coding module of transmitting terminal is obtained output state information earlier before encoding, according to output state information primary signal is encoded.
The present invention also provides a kind of video conference signal processing system, comprise: a video conference module, it is in order to transmit a video conference signal to a far end device, wherein this video conference module comprises: a far-end state receiver module, in order to receive an output state information of this far end device; And a coding module, it is encoded to this video conference signal according to this output state information, wherein has relatively low coding quality through the video conference signal behind the coding.
The present invention provides a kind of video conference signal processing system in addition again, comprise: a video conference module, it is in order to transmit a video conference signal to a far end device, wherein this video conference module comprises: a monitoring module, in order to a signal input state of monitoring this video conference module and a signal output state of this far end device; And a coding module, one of them comes this video conference signal is encoded according to this signal input state and this signal output state for it, wherein has relatively low coding quality through the video conference signal behind the coding.
Design whereby, the visual different situations of video conference signal processing system of the present invention are carried out the corresponding codes processing to primary signal, reach the effect of video data forced codingization.
Description of drawings
Fig. 1 is the schematic diagram of video conference signal processing system of the present invention.
Fig. 2 is the schematic diagram that main state or less important state carry out judgment processing for video conference signal processing system of the present invention at the video data state.
Fig. 3 is that the coding in the topography zone of video conference signal processing system of the present invention is adjusted schematic diagram.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
1 video conference signal processing system
10 receiving terminals
11 video conference modules
111 monitoring modules
The main state detection module of 111a
The less important state detection module of 111b
12 audio output devices
20 transmitting terminals
21 video conference modules
211 receiver modules
212 coding modules
213 Voice Surveillance modules
The main state detection module of 213a
The less important state detection module of 213b
22 image acquiring apparatus
23 voice input devices
W1 image output form
Other forms of w2
Embodiment
For more understanding technology contents of the present invention, be described as follows especially exemplified by going out preferred embodiment.
Below please refer to the schematic diagram of Fig. 1 for video conference signal processing system 1 of the present invention.As shown in Figure 1, video conference signal processing system 1 of the present invention comprises receiving terminal 10 and transmitting terminal 20, can carry out two-way video conference signal transfer functions in receiving terminal 10 and 20 of transmitting terminals, in the present embodiment, receiving terminal 10 and transmitting terminal 20 respectively are a computer installation, but the present invention is not as limit.
Receiving terminal 10 comprises video conference module 11 and audio output device 12, video conference module 11 is in order to the video conference signal that receives and output sends from transmitting terminal 20, and with the video conference signal with form pattern interface output display video signal, and by audio output device 12 playing audio signals, wherein audio output device 13 can be a loud speaker.Video conference module 11 more comprises monitoring module 111, signal output state in order to the video conferencing monitoring module, to produce output state information, wherein output state information comprise the image output form state information of video conference module 11 and audio frequency output state information one of them.
Because video conference signal processing system 1 of the present invention is in the vision signal processing section, image output form state information according to the video conference module 11 of receiving terminal 10 is carried out corresponding encoding process, therefore come the image output form state of video conferencing monitoring module 11 by monitoring module 111, and then obtain corresponding image output form state information, wherein image output form state information comprises form state parameter and form coordinate position parameter.The user of receiving terminal 10 may be because some demand be temporarily carried out convergent-divergent with the image output form of video conference module 11 on operating system desktop, or adjust at image output form size, or because of using other software windows to block the image output form of video conference module 11, these operations all can be changed the state of image output form.Wherein aforementioned form state parameter is represented the state of the image output form of video conference module 11, it comprises, and form minimizes, form scaling and form shielding status one of them.The coordinate position of the image output form of form coordinate position parametric representation video conference module 11.
Video conference signal processing system 1 of the present invention is in the Audio Signal Processing part, can carry out corresponding encoding process according to the audio frequency output state of the audio output device 12 of receiving terminal 10, therefore also monitor the audio frequency output state of audio output device 12 by monitoring module 111.The user of receiving terminal 10 demand of may looking is opened or is closed audio output device 12 or it carried out volume output adjust, and changes the audio frequency output state of the video conference signal of being exported in receiving terminal 10.These operations all can be changed the state of audio output device 12.
Below be illustrated with the monitoring processing mode that obtains corresponding form state parameter at aforementioned each output state signal:
1. form minimizes: utilize monitoring module 111 to obtain its present form coordinate position parameter at the image output form of video conference module 11, to judge whether to be in the minimized state of form.
2. form scaling: utilize monitoring module 111 to obtain the present form coordinate position parameter of image output form of video conference module 11, and calculate the ratio that the present image of comparison is exported form and video conference module 11 default images output forms, judge that image output form is adjusted the degree of convergent-divergent.
3. form shielding status: after utilizing monitoring module 111 to obtain the present coordinate position of the image output form of video conference module 11 and at least one other form, judge by coordinate each other whether image output form is covered by at least one other forms, and judge that image output form is partly covered or covered fully, to obtain form coordinate position parameter.When image output form is partly covered, monitoring module 111 can utilize the degree of coordinate Calculation image output form crested, to obtain form coordinate position parameter, the coordinate position of the image of form coordinate position parametric representation video conference module 11 herein output form crested place.
4. the state of audio output device 12: utilize monitoring module 111 monitoring audio output devices 12 whether to open or whether output volume is zero.Monitoring module 111 also can be monitored the audio frequency output quality of audio output device 12 in addition, and for example audio output device 12 is adjusted to monophony output etc. by multichannel output.
Transmitting terminal 20 comprises video conference module 21 and image acquiring apparatus 22, and image acquiring apparatus 22 is in order to obtain the primary signal of transmitting terminal 20 user positions; Video conference module 21 can be a video conference software, in order to original signal to receiving terminal 10; Video conference module 21 comprises receiver module 211 and coding module 212, and coding module 212 is in order to encode to primary signal, to produce the video conference signal.The output state information that transmits in order to be received from receiving terminal 10 of receiver module 211 wherein, coding module 212 is obtained output state information earlier before encoding, and primary signal is encoded according to output state information, to form the video conference signal, by video conference module 21 the video conference signal is transferred to receiving terminal 10 again.
The video conference module 21 of transmitting terminal 10 also comprises Voice Surveillance module 213, Voice Surveillance module 213 in order to the input state of the voice input device 23 of monitoring transmission end 10 to obtain input state information, make coding module 212 to carry out encoding process according to this input state information and aforementioned output state information to primary signal simultaneously, wherein voice input device 23 can be a microphone.Because the user of transmitting terminal 20 demand of may looking is opened or is closed voice input device 23 or it carried out the volume input adjust, and the audio signal state that change is imported, therefore monitor the state of voice input device 23 by Voice Surveillance module 213, handle so that video conference signal processing system of the present invention 1 is partly carried out next code according to it at voice data.
The monitoring module 12 of receiving terminal 10 can be Application Program Interface (the Application Program Interface that operating system provides, API) or microfuction circuit (Micro Function circuit, MFC), carry out immediately or periodically detection with signal output state at receiving terminal 10, but monitoring module 111 also can adopt other elements with similar functions to replace, and the present invention is not as limit.In like manner, the Voice Surveillance module 213 of transmitting terminal 20 also can adopt identical design, carries out immediately or periodically detects with the input state at the voice input device 23 of transmitting terminal 20.
The aforementioned signal output state of being monitored by the monitoring module 12 of receiving terminal 10, and the input state of the voice input device of being monitored by the Voice Surveillance module 213 of transmitting terminal 20 23 all can be divided into main state or less important state.Wherein main state is defined as the state of the coding quality that can not reduce primary signal, for example the image of the video conference module 11 of receiving terminal 10 output form from minimize revert to non-ly minimize, image output form amplifies, image output form crested zone reduces, audio output device 12 is unlocked (or volume is a non-zero from zero adjustment), voice input device 23 is unlocked (or volume is a non-zero from zero adjustment) etc.Less important state then is defined as the state of the coding quality that can reduce primary signal, and for example the image of the video conference module 11 of receiving terminal 10 output form minimizes, image output form dwindles, image output form crested zone increases, audio output device 12 is closed (or volume is adjusted into zero), voice input device 23 is closed (or volume is adjusted into zero).
Monitoring module 111 can comprise main state detection module 111a and less important state detection module 111b.Less important state detection module 111b judging whether to occur less important state, and produces output state information with notice transmitting terminal 20 according to testing result with a period 1 detection signal output state, handles so that carry out next code.Main state detection module 111a is instant or detecting the video data state second round judging whether to occur main state, and produces output state information immediately with notice transmitting terminal 20 according to testing result, and second round is less than the period 1.In like manner, the Voice Surveillance module 213 of transmitting terminal 20 also can adopt identical design, by main state detection module 213a and less important state detection module 213b, carry out immediately or periodically detect with input state at the voice input device 23 of transmitting terminal 20.
In the pilot signal output state, monitoring module 111 can judge that present signal output state is main state or less important state according to aforesaid definition, wherein when detecting the signal output state and main state occurs, before main state finished in the period 1, can change to some extent because of new signal output state takes place.
Please refer to Fig. 2 is the schematic diagram that main state or less important state carry out judgment processing for using video conference signal processing system of the present invention at the signal output state.As shown in Figure 2, with the minimized example that is adjusted into of form, less important state detection module 111b is whether the period 1 regular check image output form of t is minimized with time length, and (black round dot place in as figure) is recorded as output state information to be sent to transmitting terminal 20 when each end cycle; Whether main state detection module 111a then detects immediately has image output form to revert to non-minimized state generation from minimizing.Suppose in section A, the user exports form with image and minimizes (as figure bend arrow N1), when section A finishes, less important state detection module 111b can detect the operation of N1 and be judged as less important state, therefore is to be sent to transmitting terminal 20 to carry out corresponding encoding process after the output state information with this state recording.Then enter in the section B, the user exports form with image and reverts to non-minimizing (as black arrow M1 among the figure) from minimizing, main state detection module 111a can detect this main state immediately in user's operation, and notifies transmitting terminal 20 to carry out corresponding encoding process immediately after being recorded as output state information.And before finish to section B this operation back (as shown in FIG. in the scope of t1), no matter the user carries out minimize (as the figure bend arrow N2) of image output form once more, or repeatable operation image output form minimizes and returns to non-minimizing (as figure bend arrow N1, M2, N2), and main state detection module 111a and less important state detection module 111b all can not be recorded as output state information with emerging other signal output states of detect.This design is when preventing that the user from repeating to change the signal output state at short notice, and transmitting terminal 20 must carry out corresponding encoding process at short notice, causes the video conference signal processing on the contrary not as good as causing video or the ambiguous situation of audio signal.
Transmitting terminal 20 is obtained the output state information of receiving terminal 10, or after obtaining input state information again, carry out corresponding encoding process according to different output state information (and input state information) at primary signal, the primary signal after the encoded processing promptly forms the video conference signal.Coding module 212 can distinctly carry out encoding process at the video signal portions or the audio signal parts of primary signal.The encoding process of coding module 212 is the compression degree adjustment of primary signal, wherein the compression degree adjustment comprises stopping of audio coding or recovery, number of pictures per second (frames per second, fps) adjust, the coding adjustment in resolution adjustment and topography zone etc. one of them, but also can comprise the coding processing mode of other relevant primary signals adjustment functions, the present invention is not as limit.Below illustrate respectively at various compression degree adjustment:
1. number of pictures per second (frames per second, fps) adjust: when the image output form of the video conference module 11 of receiving terminal 10 minimizes or covered fully by other forms, the video conference module 21 of transmitting terminal 20 can reduce the number of pictures per second of primary signal according to the output state information of correspondence, to reduce transmitting terminal 20 and receiving terminal 10 handled signal data amounts.Under aforesaid state, because the user can't watch image output form, the number of pictures per second that reduces primary signal can't influence user's visual effect.
2. resolution or image quality adjustment: when arriving to a certain degree by the image output form of form coordinate comparison judgement video conference module 11 is reduced, because the image of little picture output form adopts high image quality coded image (VGA or HD) or low image quality coded image (QVGA), the picture that is presented there is no significant difference, therefore can reduce the picture resolution or the image encoding quality of primary signal by the corresponding output state information of video conference module 21 foundations of transmitting terminal 20, to reduce the use of system resource.
3. the coding adjustment in topography zone: please refer to Fig. 3 and adjust schematic diagram for the coding in the topography zone of video conference signal processing system of the present invention.As Fig. 1 and shown in Figure 3, the image of video conference module 11 output form w1 can be divided into a plurality of block of the same size by monitoring module 111 computings, and described a plurality of blocks are numbered.Suppose that image output form w1 is partly covered by other forms w2, can utilize existing obtained form coordinate to obtain image output form w1 earlier in fact by four summit A, B of other forms w2 institute range of defilade, the coordinate figure of C, D, calculate image output form w1 crested range size in fact (scope that surrounds as the thicker dotted line part branch in the lower right corner among Fig. 3) earlier by this four point coordinates, then calculate a crested district, the crested district interior a plurality of block that is covered fully of scope thus constitutes (as the oblique line part among Fig. 3).These a plurality of blocks that covered fully can be confirmed its position by aforementioned numbering at a plurality of blocks, therefore after these information are sent to transmitting terminal 20, can only carry out specific coding by the coding module 212 of video conference module 21 and handle, reduce the coding quality of video data with the part at the crested district.Though be illustrated by the situation that other forms w2 is covered with image output form w1 in the present embodiment, but when image output form w1 is covered by a plurality of other forms w2, also be suitable for the processing method of earlier figures, do not exceed with present embodiment as regional code.
4. the stopping or recovering of audio coding: when utilizing monitoring module 111 to judge that audio output devices 12 are closed or output volume when being adjusted into zero, represent receiving terminal 10 and can't playing audio signal, therefore 21 of the video conference modules of transmitting terminal 20 according to this output state information stop audio coding to primary signal, to reduce unnecessary Audio Signal Processing; In like manner, utilize Voice Surveillance module 213 to judge that voice input devices 23 are closed or output volume when being adjusted into zero, represent not input audio signal of transmitting terminal 20, so also stop audio coding primary signal.On the contrary, when utilize monitoring module 111 judge that audio output devices 12 are unlocked or output volume from zero adjustment during for non-zero, represent receiving terminal 10 to have the audio signal playing function, thus 21 of the video conference modules of transmitting terminal 20 according to this output state information recover audio coding to primary signal; In like manner, utilize Voice Surveillance module 213 to judge that voice input devices 23 are unlocked or on behalf of transmitting terminal 20, output volume, had the audio signal input function, so also recovered the audio coding to primary signal during for non-zero from zero adjustment.
5. audio quality adjustment: the audio frequency output quality that is adopted when the audio output device 12 of receiving terminal 10 is lower than the audio frequency input quality that the voice input device 23 of transmitting terminal 20 is adopted, when for example audio output device 12 is multichannel for monophony voice input device 23, in the case because audio output device 12 is not supported high tone quality output synchronously, therefore downgrade the compressed encoding quality of audio signal by the coding module 212 of video conference module 21, use and reduce unnecessary signal processing to save bandwidth.
Whereby, video conference signal processing system 1 of the present invention can be complied with video or the audio signal state difference that is monitored at primary signal, handle and carry out corresponding codes,, reach the effect of optimization coding to adjust the coding quality of formed video conference signal according to circumstances.
And for example shown in Figure 1, in transmitting terminal 20 and after forming the video conference signal with the encoded processing of primary signal, utilize the video conference module 21 of transmitting terminal 20 that the video conference signal is sent to receiving terminal 10, and export these video conference signals with the video conference module 11 of receiving terminal 10.Encoded processed video conference signal is according to corresponding its video and the audio coding quality adjusted of aforementioned output state information (and input state information), can effectively control its data transfer bandwidth and data processing amount, make the video conference module 11 of receiving terminal 10 when the output video conference signal, can reduce unnecessary system resource waste; Therefore when receiving terminal 10 is a notebook computer, use video conference signal processing system of the present invention can reduce battery power consumption with prolongation notebook service time.In addition, and for example shown in Figure 3, export the processing that form w1 is partly covered by other forms w2 for the earlier figures picture, export the form w1 scope of crested in fact owing to carry out the crested district of encoding process less than image, make the video conference module 11 of receiving terminal 10 when the output video conference signal, the overlapping edge's (being AB line and the AC line among Fig. 3) of the video conference signal of image output form w1 and other forms w2 can not produce the discontinuous situation of image, still can keep the good viewing effect of user.
Compare with known technology of only primary signal being carried out general encoding process, the encoded video conference signal of handling the back generation of the present invention, be considered as the main state of the coding quality that can not reduce primary signal, or can reduce the less important state of the coding quality of primary signal, to adjust the coding quality of video and audio signal at primary signal, so can reduce volume of transmitted data, to reduce the use of data transfer bandwidth and system resource.
Design whereby, video conference signal processing system of the present invention can apply in talk of general networking video or the video conference, because both sides all can be used as transmitting terminal and receiving terminal, therefore can carry out signal monitoring and correlative coding processing at both sides simultaneously, to save the use of both sides' system resource and bandwidth.
To sum up institute is old, and no matter the present invention all shows it totally different in the feature of known technology with regard to purpose, means and effect, is a quantum jump.Only must notice that the foregoing description only is illustrative principle of the present invention and effect thereof, but not is used to limit the scope of the invention.Any those of ordinary skills all can be under know-why of the present invention and spirit, and embodiment is made an amendment and changes.The scope of the present invention should be as described in the appended claim.
Claims (17)
1. video conference signal processing system comprises:
One transmitting terminal comprises:
One image acquiring apparatus is in order to obtain a primary signal; And
One coding module is in order to encode to this primary signal, to produce a video conference signal;
One receiving terminal, it comprises a video conference module, in order to receive and to export this video conference signal, wherein this video conference module more comprises a monitoring module, in order to monitor an output state of this video conference module, to produce an output state information;
Wherein this coding module of this transmitting terminal is obtained this output state information earlier before encoding, according to this output state information this primary signal is encoded.
2. video conference signal processing system as claimed in claim 1, wherein this output state information comprise the image output form state information of this video conference module and an audio frequency output state information one of them.
3. video conference signal processing system as claimed in claim 2, wherein this image output form state information comprises a form state parameter and a form coordinate position parameter.
4. video conference signal processing system as claimed in claim 3, the wherein coordinate position of the image of this this video conference module of form coordinate position parametric representation output form.
5. video conference signal processing system as claimed in claim 3, wherein this form state parameter is represented the state of the image output form of this video conference module, comprise that form minimizes, form scaling and form shielding status one of them.
6. video conference signal processing system as claimed in claim 5, the wherein coordinate position of the image of this this video conference module of form coordinate position parametric representation output form crested place.
7. video conference signal processing system as claimed in claim 5, wherein this form scaling utilizes this form coordinate position parameter to compare present image output form to judge with the ratio that default image is exported form.
8. video conference signal processing system as claimed in claim 1, wherein the encoding process of this coding module is the compression degree adjustment of this primary signal.
9. video conference signal processing system as claimed in claim 8, wherein this compression degree coding of being adjusted into a number of pictures per second adjustment, a resolution adjustment and a topography zone is adjusted one of them.
10. video conference signal processing system as claimed in claim 9, wherein the coding adjustment in this topography zone reduces its coding quality at least one crested district of this image output form.
11. video conference signal processing system as claimed in claim 1, wherein this transmitting terminal also comprises a Voice Surveillance module, in order to the input state of a voice input device of monitoring this transmitting terminal, to obtain an input state information.
12. video conference signal processing system as claimed in claim 11, wherein this coding module is encoded to this primary signal according to this input state information simultaneously.
13. video conference signal processing system as claimed in claim 12 wherein is closed or volume when being adjusted into zero when this voice input device, carries out the coding of this primary signal.
14. a video conference signal processing system comprises:
One video conference module, it is in order to transmit a video conference signal to a far end device, and wherein this video conference module comprises:
One far-end state receiver module is in order to receive an output state information of this far end device; And
One coding module, it is encoded to this video conference signal according to this output state information, wherein has relatively low coding quality through the video conference signal behind the coding.
15. video conference signal processing system as claimed in claim 14, wherein this video conference signal comprise a vision signal and an audio signal one of them.
16. a video conference signal processing system comprises:
One video conference module, it is in order to transmit a video conference signal to a far end device, and wherein this video conference module comprises:
One monitoring module is in order to a signal input state of monitoring this video conference module and a signal output state of this far end device; And
One coding module, one of them comes this video conference signal is encoded according to this signal input state and this signal output state for it, wherein has relatively low coding quality through the video conference signal behind the coding.
17. video conference signal processing system as claimed in claim 14, wherein this video conference signal comprise a vision signal and an audio signal one of them.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014026625A1 (en) * | 2012-08-16 | 2014-02-20 | 中兴通讯股份有限公司 | Method for processing audio input state, sending-end device and receiving-end device |
| CN106162333A (en) * | 2016-07-29 | 2016-11-23 | 王晓光 | The audio control method of video ads and system |
| CN107409090A (en) * | 2015-03-19 | 2017-11-28 | 株式会社理光 | Communication control unit, communication system, communication control method and computer program product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1454281B1 (en) * | 2001-12-15 | 2012-02-08 | Thomson Licensing | Quality of service setup on a time reservation basis |
| CN101341746B (en) * | 2005-12-22 | 2011-11-30 | 维德约股份有限公司 | System and method for videoconferencing using scalable video coding and compositing scalable video conferencing servers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014026625A1 (en) * | 2012-08-16 | 2014-02-20 | 中兴通讯股份有限公司 | Method for processing audio input state, sending-end device and receiving-end device |
| CN107409090A (en) * | 2015-03-19 | 2017-11-28 | 株式会社理光 | Communication control unit, communication system, communication control method and computer program product |
| CN106162333A (en) * | 2016-07-29 | 2016-11-23 | 王晓光 | The audio control method of video ads and system |
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