CN103916620A - Method and device for video call and mobile terminal - Google Patents
Method and device for video call and mobile terminal Download PDFInfo
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- CN103916620A CN103916620A CN201310001109.2A CN201310001109A CN103916620A CN 103916620 A CN103916620 A CN 103916620A CN 201310001109 A CN201310001109 A CN 201310001109A CN 103916620 A CN103916620 A CN 103916620A
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Abstract
The invention discloses a method for a video call. The method for the video call comprises the steps that frame sampling is conducted on video data sent within a set period of time, video data sending is stopped when it is confirmed that the rate of change between sampled video frames is smaller than or equal to a set threshold value, and a receiving end is instructed to play the video data sent within the preset period of time repeatedly. The invention further discloses a device for the video call and a mobile terminal. By the adoption of the method and device for the video call and the mobile terminal, the good video call experience of users is guaranteed, and occupancy of network resources is greatly reduced.
Description
Technical field
The present invention relates to video communication technology, relate in particular to a kind of video call method and device, mobile terminal.
Background technology
Along with the fast development of 3G (Third Generation) Moblie, at present increasing mobile terminal provides video calling service, but because video calling is higher to network bandwidth requirement, larger to mobile communications network resource occupation.In the time that a lot of people use simultaneously, transmitted data on network is larger, just can affect the transmission quality of video calling, causes the decline that user experiences.
There is at present technology to realize by some method and reduce video calling to the taking of network, guarantee that user experiences.For example, in prior art, in the time that network congestion affects video data transmitting, manually transmit rest image by user, to ensure the effect of video calling; Also someone proposes, transfer rate poor at channel quality lower in the situation that, only transmits the predefined rest image of user.In prior art, in the time that Internet Transmission is second-rate, be all to transmit static picture by the manually operated mode of user, video calling is converted into rest image call, reach the object that reduces resource occupying.
In prior art, when video calling, replace video with rest image, cannot give the real video calling of user and experience, in addition, complete by user's manual operation the mode that picture sends, user experiences poor.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of video call method and device, mobile terminal, can be in the situation that call video approaches needn't transmitting video data, save Radio Resource.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of video call method, comprising:
Carry out frame sampling to setting the video data sending in the period, when the rate of change between the frame of video of definite sampling is less than or is less than or equal to setting threshold, no longer send video data, the video data in the last described setting period of notice receiving terminal repeat playing.
Preferably, described method also comprises:
Video data in the setting period receiving is carried out to buffer memory, while receiving the repeat playing notice of transmitting terminal transmission, play the described video data of setting in the period of buffer memory.
Preferably, after the video data in the last described setting period of notice receiving terminal repeat playing, described method also comprises:
Wait for the described setting period, resend the video data of current shooting, carry out frame sampling to setting the video data sending in the period described in next, and whether the rate of change redefining between the frame of video of sampling is less than or is less than or equal to setting threshold.
Preferably, described method also comprises:
When rate of change between the frame of video of definite sampling is more than or equal to or is greater than setting threshold, continue to send the video data of current shooting, and carry out frame sampling to setting the video data sending in the period described in next, whether the rate of change redefining between the frame of video of sampling is less than or is less than or equal to setting threshold.
Preferably, describedly carry out frame sampling to setting the video data sending in the period, comprising:
Sample first frame of video and the tail frame of video of the video data sending in the described setting period;
Or, with the frame of video sending in the described setting period of sampling of mode uniformly-spaced;
Or with the frame of video sending in the described setting period of sampling of mode uniformly-spaced, described sampled video frame comprises first frame of video and the tail frame of video of described video data.
Preferably, the rate of change between the frame of video of described definite sampling is less than or is less than or equal to setting threshold, comprising:
When luminance difference between every two frame of video of definite sampling is less than or is less than or equal to setting threshold, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold;
Or, the tonal gradation of the pixel of the setting position to frame of video contrasts respectively, the tonal gradation of the pixel of each setting position is poor when being less than or being less than or equal to setting threshold, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.
A kind of video conversation apparatus, comprises transmitting element, sampling unit, determining unit and notification unit, wherein:
Transmitting element, for sending video data;
Sampling unit, for carrying out frame sampling to setting the video data sending in the period;
Determining unit, for determining that whether the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold, triggers described transmitting element and no longer sends video data, and trigger described notification unit while being;
Notification unit, for notifying the video data in the last described setting period of receiving terminal repeat playing.
Preferably, described device also comprises receiving element, buffer unit and broadcast unit, wherein:
Receiving element, for the video data in the setting period receiving; And, the repeat playing notice that receiving end/sending end sends, and trigger described broadcast unit;
Buffer unit, carries out buffer memory for the video data in the setting period that described receiving element is received;
Broadcast unit, for playing the described video data of setting in the period of buffer memory.
Preferably, described device also comprises:
Timing unit, after the video data within the last described setting period of described notification unit notice receiving terminal repeat playing, wait for the described setting period, again trigger the video data that described transmitting element sends current shooting, described sampling unit carries out frame sampling to setting the video data sending in the period described in next, and whether the rate of change that described determining unit redefines between the frame of video of sampling is less than or is less than or equal to setting threshold.
Preferably, when rate of change between the frame of video of the definite sampling of described determining unit is more than or equal to or is greater than setting threshold, trigger the video data that described transmitting element continues to send current shooting, described sampling unit carries out frame sampling to setting the video data sending in the period described in next, and whether the rate of change that described determining unit redefines between the frame of video of sampling is less than or is less than or equal to setting threshold.
Preferably, described sampling unit, also for described first frame of video and the tail frame of video of setting the video data sending in the period of sampling; Or, with the frame of video sending in the described setting period of sampling of mode uniformly-spaced; Or with the frame of video sending in the described setting period of sampling of mode uniformly-spaced, described sampled video frame comprises first frame of video and the tail frame of video of described video data.
Preferably, described determining unit, when being also less than or being less than or equal to setting threshold for the luminance difference between every two frame of video of definite sampling, determines that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold;
The tonal gradation of the pixel of the setting position to frame of video contrasts respectively, the tonal gradation of the pixel of each setting position is poor when being less than or being less than or equal to setting threshold, determines that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.
A kind of mobile terminal, comprises aforesaid video conversation apparatus.
In the present invention, carry out frame sampling to setting the video data sending in the period, when rate of change between the frame of video of definite sampling is less than or is less than or equal to setting threshold, no longer send video data, the video data in the last described setting period of notice receiving terminal repeat playing.Technical scheme of the present invention, always consistent with mobile terminal during in constant posture in communication process as user, in this process, captured video should be basic identical, now, can suspend the transmission of video data; And in the time that a side of video calling frequently moves, when video data renewal frequency is very fast, need to send new video information always; Like this, technical scheme of the present invention had both ensured the video calling experience that user is good, had greatly saved again resource occupying.
Brief description of the drawings
Fig. 1 is the flow chart of the video call method of the embodiment of the present invention;
Fig. 2 is the composition structural representation of the video conversation apparatus of the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Due in video call process, under normal circumstances, both call sides is faced camera and is conversed, the image change of camera collection is little, the video image that both call sides is seen is almost constant, and the video information of transmission has a lot of redundancies, based on this, when frequency that the video that the video call method of the embodiment of the present invention captures at camera changes is very fast, just carry out incessantly video transmission.The present invention by timing to camera collection to frame of video detect, when finding in certain hour, the variation between two frame of video, lower than setting threshold, thinks that call video does not change, transmitting terminal suspends video information transmission, a period video content in receiving terminal repeat playing; Variation between two frame of video, higher than threshold value, thinks that call video changes, and needs to send in real time video.In whole process, voice transfer is unaffected.The video call method of the embodiment of the present invention can be worked as user in video call process, always in constant posture, suspends video information transmission, has so both ensured the video calling experience that user is good, has greatly saved again resource occupying.
Fig. 1 is the flow chart of the video call method of the embodiment of the present invention, and as shown in Figure 1, the video call method of this example comprises the following steps:
Step 101, both call sides is set up video calling.
In this step, support the both sides' of video calling mobile terminal to open video call function, and start video calling.
Step 102, both call sides sends video to the other side mutually;
Video calling is two-way, need send video data to the other side mutually by both call sides.
Step 103, determines that both call sides continues, and performs step 104, otherwise finish current handling process if continue.
Step 104, samples to sent video data.
In this step, sample video data Main Means has: sampling is set the period as the first frame of video of the video data sending in T and tail frame of video; Only the first frame to the video data sending in T and tail frame are sampled, and determine by the first frame to video in T and tail frame situation of change whether the rate of change of this video exceeds setting threshold.
Or, sample and set the frame of video sending in period T in mode uniformly-spaced.To the frame of video in T, sample by the time interval of T/n, obtain n sampled point, whether exceed setting threshold by the rate of change of frame of video corresponding to this n sampled point and determine whether the video in T changes.
Or, to sample and set the frame of video sending in period T in mode uniformly-spaced, sampled video frame comprises first frame of video and the tail frame of video of described video data.The mode of this mode and aforementioned uniformly-spaced mode sampled video frame is substantially similar, but in the time that sampled point does not comprise first frame and tail frame, need be using first frame and tail frame also as sampled point.
In the present invention, T can be set to 1 second, 3 seconds or 5 seconds etc., certainly, also can be set to other times value.
Step 105, judges sampled video frame changes whether exceed threshold value, performs step 107 while being, otherwise execution step 106.
In the present invention, with the brightness situation of change between sampled video frame, the basis for estimation whether changing as frame of video.Concrete, when the luminance difference between every two frame of video of definite sampling is less than or is less than or equal to setting threshold, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.
Or, the tonal gradation of the pixel of the setting position to frame of video contrasts respectively, the tonal gradation of the pixel of each setting position is poor when being less than or being less than or equal to setting threshold, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.For example, 5 location points are chosen at center and four angles in frame of video, to every two frame of video of sampling, obtain respectively the tonal gradation of the pixel of 5 corresponding positions, tonal gradation at this 5 place is poor is all less than or is less than or equal to setting threshold value, it is identical being defined as between frame of video, otherwise to be defined as between frame of video be different.
Certainly, can determine the situation of change between frame of video by other indexs of frame of video, the present invention does not limit the mode of determining whether frame of video changes yet.
Step 106, removes frame recording, and returns to step 102.
In this step, the videograph of current cache is deleted, with the video data that buffer memory newly sends again.
Step 107, suspends transmission of video, and notifies the video data in the last setting of partner repeat playing period T.
After definite video is substantially unchanged, no longer send current captured video to partner mobile terminal, but the last video data of setting in period T of notice partner repeat playing.In the present invention, as recipient's mobile terminal, need the received video data of buffer memory, so that at the video data that receives this buffer memory of repeat playing after the repeat playing notice of transmit leg.
In the present invention, the side's mobile terminal that sends video data changes when little at definite video, also can notify the mobile terminal of partner, and the mobile terminal of partner can not receive after the video flowing of the other side's mobile terminal, the video data in the T of buffer memory before repeat playing at once.
Step 108, removes frame recording, waits for and setting after period T, returns to step 103 to resend the video data of mobile terminal current shooting.
In the present invention, although it is less that the video in T changes, but in one period that can not ensure to grow, video is still unchanged, and, if repeatedly play same section of video, can cause the experience of call poor, therefore, after repeat playing video, start again the video of current shooting to be sent to the mobile terminal of partner.
Fig. 2 is the composition structural representation of the video conversation apparatus of the embodiment of the present invention, and as shown in Figure 2, the video conversation apparatus of this example comprises transmitting element 20, sampling unit 21, determining unit 22 and notification unit 23, wherein:
Transmitting element 20, for sending video data;
Sampling unit 21, for carrying out frame sampling to setting the video data sending in the period;
Determining unit 22, for determining that whether the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold, triggers described transmitting element and no longer sends video data, and trigger described notification unit 23 while being;
Notification unit 23, for notifying the video data in the last described setting period of receiving terminal repeat playing.
On the basis of the video conversation apparatus shown in Fig. 2, the video conversation apparatus of this example also comprises receiving element (not shown in Fig. 2), buffer unit (not shown in Fig. 2) and broadcast unit (not shown in Fig. 2), wherein:
Receiving element, for the video data in the setting period receiving; And, the repeat playing notice that receiving end/sending end sends, and trigger described broadcast unit;
Buffer unit, carries out buffer memory for the video data in the setting period that described receiving element is received;
Broadcast unit, for playing the described video data of setting in the period of buffer memory.
On the basis of the video conversation apparatus shown in Fig. 2, the video conversation apparatus of this example also comprises:
Timing unit (not shown in Fig. 2), after the video data within the last described setting period of described notification unit notice receiving terminal repeat playing, wait for the described setting period, again trigger the video data that described transmitting element 20 sends current shooting, described sampling unit 21 carries out frame sampling to setting the video data sending in the period described in next, and whether the rate of change that described determining unit 22 redefines between the frame of video of sampling is less than or is less than or equal to setting threshold.
When rate of change between the frame of video of the definite sampling of described determining unit is more than or equal to or is greater than setting threshold, trigger the video data that described transmitting element 20 continues to send current shooting, described sampling unit 21 carries out frame sampling to setting the video data sending in the period described in next, and whether the rate of change that described determining unit 22 redefines between the frame of video of sampling is less than or is less than or equal to setting threshold.
Above-mentioned sampling unit, also for described first frame of video and the tail frame of video of setting the video data sending in the period of sampling; Or, with the frame of video sending in the described setting period of sampling of mode uniformly-spaced; Or with the frame of video sending in the described setting period of sampling of mode uniformly-spaced, described sampled video frame comprises first frame of video and the tail frame of video of described video data.
Above-mentioned determining unit 22, when being also less than or being less than or equal to setting threshold for the luminance difference between every two frame of video of definite sampling, determines that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold;
The tonal gradation of the pixel of the setting position to frame of video contrasts respectively, the tonal gradation of the pixel of each setting position is poor when being less than or being less than or equal to setting threshold, determines that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.
The function that it will be appreciated by those skilled in the art that the processing unit that the video conversation apparatus shown in Fig. 2 relates to can be passed through hardware circuit, or carries out corresponding software by processor and realized.The function of above-mentioned each processing unit, can understand in conjunction with the description of the related embodiment of aforementioned video call method of the present invention and example.
The present invention has also recorded a kind of mobile terminal, comprises the flow control apparatus shown in Fig. 2.
Obviously, those skilled in the art should be understood that, above-mentioned each processing unit of the present invention or each step can realize with general calculation element, it can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, it can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (13)
1. a video call method, is characterized in that, described method comprises:
Carry out frame sampling to setting the video data sending in the period, when the rate of change between the frame of video of definite sampling is less than or is less than or equal to setting threshold, no longer send video data, the video data in the last described setting period of notice receiving terminal repeat playing.
2. method according to claim 1, is characterized in that, described method also comprises:
Video data in the setting period receiving is carried out to buffer memory, while receiving the repeat playing notice of transmitting terminal transmission, play the described video data of setting in the period of buffer memory.
3. method according to claim 1, is characterized in that, after the video data in the last described setting period of notice receiving terminal repeat playing, described method also comprises:
Wait for the described setting period, resend the video data of current shooting, carry out frame sampling to setting the video data sending in the period described in next, and whether the rate of change redefining between the frame of video of sampling is less than or is less than or equal to setting threshold.
4. according to the method described in claim 1 or 3, it is characterized in that, described method also comprises:
When rate of change between the frame of video of definite sampling is more than or equal to or is greater than setting threshold, continue to send the video data of current shooting, and carry out frame sampling to setting the video data sending in the period described in next, whether the rate of change redefining between the frame of video of sampling is less than or is less than or equal to setting threshold.
5. according to the method described in claim 1 to 4 any one, it is characterized in that, describedly carry out frame sampling to setting the video data sending in the period, comprising:
Sample first frame of video and the tail frame of video of the video data sending in the described setting period;
Or, with the frame of video sending in the described setting period of sampling of mode uniformly-spaced;
Or with the frame of video sending in the described setting period of sampling of mode uniformly-spaced, described sampled video frame comprises first frame of video and the tail frame of video of described video data.
6. according to the method described in claim 1 to 5 any one, it is characterized in that, the rate of change between the frame of video of described definite sampling is less than or is less than or equal to setting threshold, comprising:
When luminance difference between every two frame of video of definite sampling is less than or is less than or equal to setting threshold, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold;
Or, the tonal gradation of the pixel of the setting position to frame of video contrasts respectively, the tonal gradation of the pixel of each setting position is poor when being less than or being less than or equal to setting threshold, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.
7. a video conversation apparatus, is characterized in that, described device comprises transmitting element, sampling unit, determining unit and notification unit, wherein:
Transmitting element, for sending video data;
Sampling unit, for carrying out frame sampling to setting the video data sending in the period;
Determining unit, for determining that whether the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold, triggers described transmitting element and no longer sends video data, and trigger described notification unit while being;
Notification unit, for notifying the video data in the last described setting period of receiving terminal repeat playing.
8. device according to claim 7, is characterized in that, described device also comprises receiving element, buffer unit and broadcast unit, wherein:
Receiving element, for the video data in the setting period receiving; And, the repeat playing notice that receiving end/sending end sends, and trigger described broadcast unit;
Buffer unit, carries out buffer memory for the video data in the setting period that described receiving element is received;
Broadcast unit, for playing the described video data of setting in the period of buffer memory.
9. device according to claim 7, is characterized in that, described device also comprises:
Timing unit, after the video data within the last described setting period of described notification unit notice receiving terminal repeat playing, wait for the described setting period, again trigger the video data that described transmitting element sends current shooting, described sampling unit carries out frame sampling to setting the video data sending in the period described in next, and whether the rate of change that described determining unit redefines between the frame of video of sampling is less than or is less than or equal to setting threshold.
10. according to the device described in claim 7 or 9, it is characterized in that, when rate of change between the frame of video of the definite sampling of described determining unit is more than or equal to or is greater than setting threshold, trigger the video data that described transmitting element continues to send current shooting, described sampling unit carries out frame sampling to setting the video data sending in the period described in next, and whether the rate of change that described determining unit redefines between the frame of video of sampling is less than or is less than or equal to setting threshold.
11. according to the device described in claim 7 to 10 any one, it is characterized in that, described sampling unit, also for described first frame of video and the tail frame of video of setting the video data sending in the period of sampling; Or, with the frame of video sending in the described setting period of sampling of mode uniformly-spaced; Or with the frame of video sending in the described setting period of sampling of mode uniformly-spaced, described sampled video frame comprises first frame of video and the tail frame of video of described video data.
12. according to the device described in claim 7 to 11 any one, it is characterized in that, described determining unit, when being also less than or being less than or equal to setting threshold for the luminance difference between every two frame of video of definite sampling, determine that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold;
The tonal gradation of the pixel of the setting position to frame of video contrasts respectively, the tonal gradation of the pixel of each setting position is poor when being less than or being less than or equal to setting threshold, determines that the rate of change between the frame of video of sampling is less than or is less than or equal to setting threshold.
13. 1 kinds of mobile terminals, is characterized in that, described mobile terminal comprises the video conversation apparatus described in claim 7 to 12 any one.
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| CN105072374A (en) * | 2015-07-29 | 2015-11-18 | 小米科技有限责任公司 | Video communication method and device |
| CN105812710A (en) * | 2016-05-05 | 2016-07-27 | 广东小天才科技有限公司 | Method and system for optimizing image quality in video call process |
| CN106375700A (en) * | 2015-07-24 | 2017-02-01 | 中国移动通信集团云南有限公司 | Video transmission method and mobile terminal |
| CN106817410A (en) * | 2016-12-28 | 2017-06-09 | 广州大气候农业科技有限公司 | Image retransmission method, image storage method, the node and server of Internet of Things |
| CN107426142A (en) * | 2016-12-28 | 2017-12-01 | 广州大气候农业科技有限公司 | Image retransmission method, image storage method, the node and server of Internet of Things |
| CN107707969A (en) * | 2017-09-04 | 2018-02-16 | 深圳市屯奇尔科技有限公司 | Video broadcasting method, device and terminal device |
| CN107995454A (en) * | 2017-12-02 | 2018-05-04 | 程桂平 | Changed based on the human face characteristic point in video to determine whether the method for transmitting video data |
| CN109194974A (en) * | 2018-09-28 | 2019-01-11 | 北京北斗方圆电子科技有限公司 | Media low latency communication means and system for internet video live broadcasting |
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| CN106375700A (en) * | 2015-07-24 | 2017-02-01 | 中国移动通信集团云南有限公司 | Video transmission method and mobile terminal |
| CN105072374A (en) * | 2015-07-29 | 2015-11-18 | 小米科技有限责任公司 | Video communication method and device |
| CN105812710A (en) * | 2016-05-05 | 2016-07-27 | 广东小天才科技有限公司 | Method and system for optimizing image quality in video call process |
| CN105812710B (en) * | 2016-05-05 | 2019-01-04 | 广东小天才科技有限公司 | Optimize the method and system of picture quality in video call process |
| CN106817410A (en) * | 2016-12-28 | 2017-06-09 | 广州大气候农业科技有限公司 | Image retransmission method, image storage method, the node and server of Internet of Things |
| CN107426142A (en) * | 2016-12-28 | 2017-12-01 | 广州大气候农业科技有限公司 | Image retransmission method, image storage method, the node and server of Internet of Things |
| CN106817410B (en) * | 2016-12-28 | 2020-04-21 | 广州大气候农业科技有限公司 | Image returning method, image storage method, node of Internet of things and server |
| CN107426142B (en) * | 2016-12-28 | 2020-04-21 | 广州大气候农业科技有限公司 | Image returning method, image storage method, node of Internet of things and server |
| CN107707969A (en) * | 2017-09-04 | 2018-02-16 | 深圳市屯奇尔科技有限公司 | Video broadcasting method, device and terminal device |
| CN107995454A (en) * | 2017-12-02 | 2018-05-04 | 程桂平 | Changed based on the human face characteristic point in video to determine whether the method for transmitting video data |
| CN109194974A (en) * | 2018-09-28 | 2019-01-11 | 北京北斗方圆电子科技有限公司 | Media low latency communication means and system for internet video live broadcasting |
| CN109194974B (en) * | 2018-09-28 | 2020-12-01 | 北京网高科技股份有限公司 | Media low-delay communication method and system for network video live broadcast |
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