CN101990083B - Video conference signal processing system - Google Patents
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- CN101990083B CN101990083B CN200910164919.3A CN200910164919A CN101990083B CN 101990083 B CN101990083 B CN 101990083B CN 200910164919 A CN200910164919 A CN 200910164919A CN 101990083 B CN101990083 B CN 101990083B
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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, the mode of carrying out two or Multi-Party Conference by Internet video is accepted by masses widely, because Internet video can be carried out in unlimited time place, and compared with phone liaison method, more increased the instant image information of dialogue side, promoted significantly the convenience on using.
Internet video is mostly carried out the software with associated video function by computer and is transmitted 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 Internet Transmission video data.In the situation that network state is not satisfactory or computer resource is not enough, be easy to make received image or audio frequency intermittently or postpone have some setbacks, cause user's puzzlement.Therefore how reducing video software shared system resource and network bandwidth use amount in implementation, to improve data transmission efficiency and to reduce the impact on 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 object, 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 primary signal is encoded, to produce video conference signal.Receiving terminal comprises video conference module, in order to receive and output video conference signal, wherein video conference module comprises monitoring module, signal output state in order to video conferencing monitoring module, to produce output state information, wherein this output state information comprise an image output form Status Change information of this video conference module and audio frequency output state change information one of them.Wherein the coding module of transmitting terminal is first obtained output state information before encoding, primary signal is encoded according to output state information.
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, and wherein the video conference signal after coding has relatively low coding quality.
The present invention provides again a kind of video conference signal processing system in addition, 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 monitor a signal input state of this video conference module and a signal output state of this far end device, wherein this signal output state comprise an image output form state information of this far end device and an audio frequency output state information one of them; And a coding module, according to this signal input state and this signal output state, one of them is encoded to this video conference signal for it, and wherein the video conference signal after coding has relatively low coding quality.
Design whereby, the visual different situations of video conference signal processing system of the present invention are carried out corresponding coding processing to primary signal, reach the effect of video data forced coding.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of video conference signal processing system of the present invention.
Fig. 2 is that video conference signal processing system of the present invention is that main state or less important state judge the schematic diagram of processing for video data state.
Fig. 3 is the code adjustment schematic diagram in the topography region of video conference signal processing system of the present invention.
Description of reference numerals in 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, especially exemplified by going out preferred embodiment, be described as follows.
Below please refer to the schematic diagram that Fig. 1 is 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, in receiving terminal 10 and 20 of transmitting terminals, can carry out two-way video conference signal transfer functions, in the present embodiment, receiving terminal 10 and transmitting terminal 20 are respectively 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 receive and to export the video conference signal sending from transmitting terminal 20, and by video conference signal with a form pattern interface output display vision 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, a signal output state in order to 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 vision signal processing section, image output form state information according to the video conference module 11 of receiving terminal 10 is carried out the processing of correspondence coding, therefore by monitoring module 111, carry out the image output form state of video conferencing monitoring module 11, 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 by the image output form of video conference module 11 on operating system desktop, or adjust for image output form size, or because using other software windows to block the image output form of video conference module 11, the state that these operations all can Altered Graphs picture output form.Wherein aforementioned form state parameter represents 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 Audio Signal Processing part, can carry out according to the audio frequency output state of the audio output device 12 of receiving terminal 10 correspondence coding and process, therefore also by monitoring module 111, monitor the audio frequency output state of audio output device 12.The user of receiving terminal 10 may open or close audio output device 12 or it be carried out to volume output and adjust depending on demand, and changes the audio frequency output state of the video conference signal of exporting in receiving terminal 10.These operations all can be changed the state of audio output device 12.
For aforementioned each output state signal, to obtain the monitoring processing mode of corresponding form state parameter, be illustrated below:
1. form minimizes: utilize monitoring module 111 to obtain its current form coordinate position parameter for the image output form of video conference module 11, to judge whether in the minimized state of form.
2. form scaling: utilize monitoring module 111 to obtain the current form coordinate position parameter of image output form of video conference module 11, and calculate the ratio that the current image of comparison is exported form and the default image output of video conference module 11 form, judge the degree of the adjusted convergent-divergent of image output form.
3. form shielding status: utilize monitoring module 111 to obtain after the image output form of video conference module 11 and the current coordinate position of at least one other form, by coordinate each other, judge whether image output form is covered by least one other forms, and judge that image output form is partly covered or covered completely, to obtain form coordinate position parameter.When image output form is partly covered, monitoring module 111 can utilize the degree of coordinate computed 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.In addition monitoring module 111 also can be monitored the audio frequency output quality of audio output device 12, such as audio output device 12, by multichannel output, is adjusted to monophony output etc.
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 meeting 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 primary signal is encoded, to produce video conference signal.The output state information that wherein receiver module 211 transmits in order to be received from receiving terminal 10, coding module 212 is first obtained output state information before encoding, and according to output state information, primary signal is encoded, to form video conference signal, then by video conference module 21, video conference signal is transferred to receiving terminal 10.
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 according to this input state information and aforementioned output state information, to primary signal, to carry out coding simultaneously and process, wherein voice input device 23 can be a microphone.Because the user of transmitting terminal 20 may open or close voice input device 23 or it be carried out to volume input and adjust depending on demand, and the audio signal state that change is inputted, therefore by Voice Surveillance module 213, monitor the state of voice input device 23, so that video conference signal processing system of the present invention 1 partly carries out next code processing according to it for 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), with the signal output state for receiving terminal 10, carry out immediately or periodically detect, 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, with the input state of the voice input device 23 for transmitting terminal 20, carries out immediately or periodically detects.
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 23 of being monitored by the Voice Surveillance module 213 of transmitting terminal 20, all can divide 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, such as the image output form of the video conference module 11 of receiving terminal 10 from minimize revert to non-ly minimize, image output form amplifies, image output form crested region reduces, audio output device 12 is unlocked (or volume is non-zero from zero adjustment), voice input device 23 is unlocked (or volume is non-zero from zero adjustment) etc.Less important state 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 is exported Zoom Viewport Out, image output form crested region 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 to judge whether to occur less important state, and produces output state information with notice transmitting terminal 20, to carry out next code processing according to testing result with a period 1 detection signal output state.Main state detection module 111a is instant or to detect video data state a second round to judge whether to occur main state, and produces immediately output state information with notice transmitting terminal 20 according to testing result, and is less than the period 1 second round.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, with the input state of the voice input device 23 for transmitting terminal 20, carry out immediately or periodically detect.
In pilot signal output state, monitoring module 111 can judge that current signal output state is main state or less important state according to aforesaid definition, wherein when signal output state being detected and occur main state, before main state finished in the period 1, can the change to some extent because of there is new signal output state.
Please refer to Fig. 2 is that main state or less important state judge the schematic diagram of processing for using video conference signal processing system of the present invention for signal output state.As shown in Figure 2, with the minimized example that is adjusted into of form, whether less important state detection module 111b be take the period 1 regular check image output form of the long t of being of time and is minimized, 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 detects immediately has image output form to revert to non-minimized state generation from minimizing.Suppose in section A, user exports form by 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, by this state recording, is therefore after output state information, to be sent to transmitting terminal 20 to process to carry out correspondence coding.Then enter in section B, user exports form by image and reverts to non-minimizing (as black arrow M1 in figure) from minimizing, in user's operation, main state detection module 111a can detect this main state immediately, and notifies immediately transmitting terminal 20 to process to carry out correspondence coding after being recorded as output state information.And before finishing to section B after this operation (as shown in FIG. in the scope of t1), no matter user carries out minimize (as the figure bend arrow N2) of image output form again, or repeatable operation image output form minimizes and returns to non-minimizing (as figure bend arrow N1, M2, N2), main state detection module 111a and less important state detection module 111b all can not be recorded as output state information by detected emerging other signal output states.This design is when preventing that user from repeating to change signal output state at short notice, and transmitting terminal 20 must carry out correspondence coding at short notice to be processed, and causes on the contrary video conference signal to process too late cause video or the ambiguous situation of audio signal.
Transmitting terminal 20 is obtained the output state information of receiving terminal 10, or obtain again after input state information, according to different output state information (and input state information), come to carry out corresponding coding for primary signal and process, the primary signal after encoded processing forms video conference signal.Coding module 212 can be for the processing of distinctly encoding of the video signal portions of primary signal or audio signal parts.The coding of coding module 212 is treated to the compression degree adjustment of primary signal, wherein compression degree adjustment comprises stopping of audio coding or recovery, number of pictures per second (frames per second, fps) adjust, the code adjustment in resolution adjustment and topography region etc. one of them, but also can comprise that other are about the coding processing mode of primary signal adjustment function, the present invention is not as limit.For various compression degree adjustment, illustrate respectively below:
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 completely 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 corresponding output state information, to reduce the handled signal data amount of transmitting terminal 20 and receiving terminal 10.Under aforesaid state, because user cannot watch image output form, the number of pictures per second that reduces primary signal can't affect user's visual effect.
2. resolution or image quality adjustment: when the image output form by form coordinate contrast judgement video conference module 11 reduced to a certain extent time, image output form employing high image quality coded image (VGA or HD) or lower image quality coded image (QVGA) due to little picture, the picture presenting there is no significant difference, therefore the video conference module 21 by transmitting terminal 20 can reduce picture resolution or the Image Coding quality of primary signal according to corresponding output state information, to reduce the use of system resource.
3. the code adjustment in topography region: please refer to Fig. 3 is the code adjustment schematic diagram in the topography region of video conference signal processing system of the present invention.As shown in Figures 1 and 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 first to obtain image output form w1 in fact by four summit A, B of other forms w2 institute range of defilade, the coordinate figure of C, D, by this four point coordinates, first calculate image output form w1 crested range size in fact (scope that dotted portion surrounded as thicker in the lower right corner in Fig. 3), then calculate a crested district, the crested district thus interior a plurality of block being covered completely of scope forms (as the oblique line part in Fig. 3).These a plurality of blocks that covered completely can be confirmed its position by the aforementioned numbering for a plurality of blocks, therefore in these information, be sent to after transmitting terminal 20, can only for crested district, carry out specific coding processing by the coding module 212 of video conference module 21, with part, reduce the coding quality of video data.Though the situation of being covered by other forms w2 with image output form w1 is in the present embodiment illustrated, but when image output form w1 is covered by a plurality of other forms w2, applicable earlier figures, as the processing method of regional code, is not limited with the present embodiment yet.
4. the stopping or recovering of audio coding: when utilizing monitoring module 111 judgement audio output devices 12 to be closed or output volume is adjusted into zero, represent receiving terminal 10 cannot playing audio signal, therefore 21 of the video conference modules of transmitting terminal 20 according to this output state information stop the audio coding to primary signal, to reduce unnecessary Audio Signal Processing; In like manner, utilize Voice Surveillance module 213 to judge when voice input devices 23 are closed or output volume is adjusted into zero, represent not input audio signal of transmitting terminal 20, therefore also stop the audio coding to primary signal.On the contrary, when utilize monitoring module 111 judgement audio output devices 12 to be unlocked or output volume from zero adjustment during for non-zero, represent that receiving terminal 10 has had audio signal playing function, thus 21 of the video conference modules of transmitting terminal 20 according to this output state information recover the audio coding to primary signal; In like manner, utilize Voice Surveillance module 213 judgement voice input devices 23 to be unlocked or output volume during for non-zero, represents that transmitting terminal 20 has had audio signal input function from zero adjustment, therefore also recover the audio coding to primary signal.
5. audio quality adjustment: the audio frequency input quality that the audio frequency output quality adopting when the audio output device 12 of receiving terminal 10 adopts lower than the voice input device 23 of transmitting terminal 20, for example, when audio output device 12 is multichannel for monophony voice input device 23, in the case because audio output device 12 is not synchronously supported high tone quality output, therefore by the coding module 212 of video conference module 21, downgrade the compressed encoding quality of audio signal, to save bandwidth, use and reduce unnecessary signal and process.
Whereby, video conference signal processing system 1 of the present invention can be complied with monitored video or audio signal state difference for primary signal, and carry out corresponding coding, process, optionally to adjust the coding quality of formed video conference signal, reach the effect of optimization coding.
Again as shown in Figure 1, in transmitting terminal 20, the encoded processing of primary signal is formed after video conference signal, utilize the video conference module 21 of transmitting terminal 20 that 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.Video conference signal after encoded processing 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 can reduce unnecessary system resource waste when output video conference signal; 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, again as shown in Figure 3, the processing of partly being covered by other forms w2 for earlier figures picture output form w1, the crested district processing owing to encoding is less than the image output form w1 scope of crested in fact, make the video conference module 11 of receiving terminal 10 when output video conference signal, the overlapping edge's (being AB line and the AC line in 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.
Only primary signal is carried out to the technology that general coding processes and compare with known, the video conference signal that the encoded processing of the present invention produces afterwards, 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 for 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 the talk of general networking video or video conference, because both sides all can be used as transmitting terminal and receiving terminal, therefore can for both sides, carry out signal monitoring and correlative coding processing, to save the use of both sides' system resource and bandwidth simultaneously.
To sum up institute is old, and the present invention, no matter with regard to object, means and effect, all shows that it is totally different in the feature of known technology, is a quantum jump.Only must note, above-described embodiment is only illustrative principle of the present invention and effect thereof, but not for limiting the scope of the invention.Any those of ordinary skills all can, under know-why of the present invention and spirit, make an amendment and change embodiment.The scope of the present invention should be as described in appended claim.
Claims (12)
1. a video conference signal processing system, comprising:
One transmitting terminal, comprising:
One image acquiring apparatus, in order to obtain a primary signal; And
One coding module, in order to this primary signal is encoded, to produce a video conference signal;
One receiving terminal, it comprises a video conference module, in order to receive this video conference signal and to export the vision signal of this video conference signal and the audio signal of exporting this video conference signal by an audio output device by an image output form, wherein this video conference module more comprises a monitoring module, in order to monitor, window interface that this image output form changes changes and the audio frequency output state of this audio output device changes, with produce an image output form Status Change information and audio frequency output state change information one of them; Wherein this window interface changes to comprise judge the current form coordinate position parameter of this image output form confirms whether this image output form is minimized, or the form coordinate position parameter that judges this image output form and at least one other form confirms that this image exports whether crested of form; And this audio frequency output state changes and comprises and judge whether this audio output device is opened or whether output volume is zero;
Wherein this coding module of this transmitting terminal is first obtained this image output form Status Change information or this audio frequency output state change information before encoding, this primary signal is encoded according to this image output form Status Change information or this audio frequency output state change information.
2. video conference signal processing system as claimed in claim 1, the wherein coordinate position of the image of this this video conference module of form coordinate position Parametric Representation output form.
3. video conference signal processing system as claimed in claim 1, wherein this window interface changes and also comprises that the form scaling of this image output form changes.
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 crested place.
5. video conference signal processing system as claimed in claim 3, wherein to change be to utilize this form coordinate position parameter to compare the ratio that current image output form and default image export form to judge to this form scaling.
6. video conference signal processing system as claimed in claim 1, wherein the coding of this coding module is treated to the compression degree adjustment of this primary signal.
7. video conference signal processing system as claimed in claim 6, wherein this compression degree be adjusted into a number of pictures per second adjustment, a resolution adjust Ji Yi topography region code adjustment one of them.
8. video conference signal processing system as claimed in claim 7, wherein the code adjustment in this topography region reduces its coding quality at least one crested district of this image output form.
9. video conference signal processing system as claimed in claim 1, wherein this transmitting terminal also comprises a Voice Surveillance module, in order to monitor the input state of a voice input device of this transmitting terminal, to obtain an input state information.
10. video conference signal processing system as claimed in claim 9, wherein this coding module is encoded to this primary signal according to this input state information simultaneously.
11. video conference signal processing systems as claimed in claim 10, wherein, when this voice input device is closed or volume is adjusted into zero, stop the coding to this primary signal.
12. 1 kinds of video conference signal processing systems, comprising:
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, in order to monitor an audio signal input state of this video conference module and a signal output state of this far end device, wherein this signal output state comprise this far end device export the image output form state information of an image output form of vision signal of this video conference signal and an audio frequency output state information of an audio output device of the audio signal that this far end device is exported this video conference signal one of them; Wherein this image output form Status Change information is that window interface according to this image output form changes and produces, and this audio frequency output state change information is that this audio frequency output state according to this audio output device changes and produces; Wherein this window interface changes to comprise judge the current form coordinate position parameter of this image output form confirms whether this image output form is minimized, or the form coordinate position parameter that judges this image output form and at least one other form confirms that this image exports whether crested of form; And this audio frequency output state changes and comprises and judge whether this audio output device is opened or whether output volume is zero; And
One coding module, according to this audio signal input state and this signal output state, one of them is encoded to this video conference signal for it, and wherein the video conference signal after coding has relatively low coding quality.
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| CN101341746A (en) * | 2005-12-22 | 2009-01-07 | 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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| CN1618071A (en) * | 2001-12-15 | 2005-05-18 | 汤姆森特许公司 | Service quality setting based on time reservation |
| CN101341746A (en) * | 2005-12-22 | 2009-01-07 | 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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