CN101409832A - Transmission method and apparatus for video data - Google Patents
Transmission method and apparatus for video data Download PDFInfo
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- CN101409832A CN101409832A CNA2008102024630A CN200810202463A CN101409832A CN 101409832 A CN101409832 A CN 101409832A CN A2008102024630 A CNA2008102024630 A CN A2008102024630A CN 200810202463 A CN200810202463 A CN 200810202463A CN 101409832 A CN101409832 A CN 101409832A
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Abstract
The invention discloses a video data transmission method and a device; wherein, the method comprises as follows: obtaining a service data unit SDU which is not transmitted to a receiving terminal; throwing the SDU away when a time delay happens to the SDU. According to the embodiment of the invention, when a certain SDU can generate time delay, a network side directly throws the SDU away to lead the SDU which can generate time delay not to occupy a network resource again, thereby improving the transmission efficiency. Besides, when the network side identifies that a certain SDU can generate time delay and continuously transmits the SDU, the other SDUs are possibly caused to also generate time delay, which causes more effects on the video business quality of the receiving terminal; therefore, throwing the SDU which can generate time delay at the network side can improve the video business quality of the receiving terminal.
Description
Technical field
The present invention relates to the stream media technology field, particularly a kind of transmission method of video data and device.
Background technology
Along with the development of wireless communication technique and stream media technology, the application of streaming media video business in wireless more and more widely, the user can carry out video request program and net cast business easily by wireless terminal.
The professional host-host protocol that uses of streaming media video has RTP (Real-time Transport Protocol, RTP), RTCP (RTP Control Protocol, RTP Control Protocol) and RTSP (Real-TimeStreaming Protocol, real-time stream media protocol).Wherein, the agreement of carrying audio frequency, video data is RTP.
In the prior art, transmitting terminal is divided into the plurality of RTP bag with a frame of video, then these RTP bags is transmitted for carrier sends in the wireless network with SDU (Service Data Unit, service data unit).As shown in Figure 1, it is the subpackage and carrying schematic diagram of frame of video.Receiving terminal receives SDU, thereby obtains the RTP bag, and the RTP package that will belong to same frame of video then synthesizes a frame of video, and the frame of video after will making up is at last play on a frame one frame ground in order.
The inventor finds that in the prior art, each SDU has fixing broadcast constantly at receiving terminal, has only when SDU arrived receiving terminal before the broadcast corresponding with it constantly, just can be received to rectify really and play; Otherwise, if SDU arrives receiving terminal after the broadcast corresponding with it constantly, then receiving terminal can abandon this SDU, thereby produced the time delay packet loss, because all SDU are adopted identical transmission policy, efficient is lower, if can take different strategies at the different attribute of SDU, then can improve the efficient of transmission.
Summary of the invention
The embodiment of the invention provides a kind of transmission method and device of video data, abandons video data that time delay will take place to improve the efficiency of transmission of network.
The embodiment of the invention discloses a kind of transmission method of video data, described method comprises: obtain service data unit SDU; When time delay can take place described SDU, abandon described SDU.
The embodiment of the invention also discloses a kind of transmitting device of video data, described device comprises: acquiring unit is used to obtain service data unit SDU; First processing unit is used for as described SDU time delay taking place, and abandons described SDU.
When in receiving terminal carrying out video traffic, the time delay packet loss of SDU taking place,,, be the same with the effect of not receiving this SDU for receiving terminal though wireless network can correctly be sent to receiving terminal with SDU.Therefore, when the network side handle can take the interface-free resources of transmission network when the SDU of receiving terminal generation time delay packet loss is transferred to receiving terminal, caused the waste of transmission network efficiency of transmission.
By implementing the embodiment of the invention,, make the SDU that time delay can take place no longer take the interface-free resources of transmission network, thereby improved the efficiency of transmission of transmission network by the SDU of meeting generation time delay being discarded at network side.
In addition, identified when network side that the time delay packet loss can take place certain SDU and when continuing to transmit this SDU, might cause other SDU also to produce the time delay packet loss, the video service quality of receiving terminal has been caused bigger influence.Therefore, abandon the video service quality that the SDU that the time delay packet loss can take place also can improve receiving terminal at network side.
Description of drawings
Fig. 1 is the subpackage and carrying schematic diagram of frame of video in the prior art;
Fig. 2 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention one;
Fig. 3 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention two;
Fig. 4 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention three;
Fig. 5 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention four;
Fig. 6 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention five;
Fig. 7 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention six;
Fig. 8 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention seven;
Fig. 9 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention eight.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Embodiment one
See also Fig. 2, Fig. 2 is the flow chart signal of the transmission method of a kind of video data of disclosing of the embodiment of the invention one, and this method may further comprise the steps:
Step 201: obtain service data unit SDU;
Transmitting terminal is divided into the plurality of RTP bag with a frame of video, is that carrier sends in the wireless network and transmits then with SDU with these RTP bag, by receiving terminal the SDU in the wireless network is received again, and described SDU is used to carry video data.
Step 202: time-delay when described SDU can take place abandons described SDU.
The technical scheme of prediction time delay comprises:
Obtain the sequence number of SDU of the frame of video of current broadcast; Obtain the sequence number of SDU current to be transmitted; Judge whether described current SDU to be transmitted time delay can take place, if the sequence number of the SDU of the frame of video of described current broadcast is greater than or equal to the sequence number of described current SDU to be transmitted, time delay can take place in described current SDU to be transmitted.
About the sequence number of the SDU that obtains current broadcast, such as utilizing RTCP (RTP ControlProtocol, RTP Control Protocol) bag to realize.If the RTCP bag has carried the sequence number that next receiving terminal needs decoded SDU, can infer the sequence number of the SDU of current broadcast by the sequence number of this SDU.A kind of simple mode can directly be used the described next sequence number that needs decoded SDU, deducts certain value, as the sequence number of the SDU of current broadcast.
Obtain after the sequence number of SDU of current broadcast, the SDU that will be obtained in step 201 is as current SDU to be sent, and both compare, if the sequence number of the SDU of current broadcast is bigger, illustrates that then time delay takes place current SDU to be sent.
Present embodiment may further include step 203: time-delay when described SDU can not take place sends described SDU.
The present embodiment execution that can circulate.For example, after step 203 is finished, can continue execution in step 201, promptly continue to obtain next SDU, judge whether next SDU time delay can take place, and do the processing that abandons or send according to the result who judges, finish this circulation implementation back that can dispose up to all video datas.
Embodiment two
See also Fig. 3, Fig. 3 is the structural representation of the transmitting device of a kind of video data of disclosing of the embodiment of the invention two.Can be corresponding with the transmission method of a kind of video data of disclosing in the embodiment of the invention one, the transmitting device of a kind of video data that the embodiment of the invention two provides comprises: the acquiring unit 301 and first processing unit 302.
Wherein, acquiring unit 301 is used to obtain service data unit SDU;
First processing unit 302 is used for time-delay when SDU that described acquiring unit 301 obtains can take place, and abandons the SDU that described acquiring unit 301 obtains.
Present embodiment also comprises predicting unit, is used to predict whether the SDU that described acquiring unit 301 obtains time delay can take place;
Said apparatus can further include transmitting element, and time-delay did not send described SDU when the SDU that is used for obtaining when described acquiring unit 301 can not take place.
By implementing the embodiment of the invention two, network side obtains SDU, and time-delay abandons this SDU when this SDU can take place, and makes and will no longer take the interface-free resources of transmission network at the SDU of receiving terminal generation time delay packet loss, thereby improved the efficiency of transmission of transmission network.
In addition, identify when network side that the time delay packet loss can take place certain SDU and when continuing to transmit this SDU, might cause other SDU also to produce the time delay packet loss, the video service quality of receiving terminal is caused bigger influence.Therefore, abandon the video service quality that the SDU that the time delay packet loss can take place also can improve receiving terminal at network side.
Embodiment three
See also Fig. 4, Fig. 4 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention three, comprises the steps:
Step 401: obtain service data unit SDU;
Step 402: time-delay when described SDU can take place abandons described SDU.
Step 403: abandon other SDU that belongs to same frame of video with described SDU.
All SDU that belong to a frame of video have identical broadcast constantly, judge that when network side the time delay packet loss can take place the current SDU that obtains, and so, other SDU that belongs to a frame of video with this SDU together too the time delay packet loss can take place.For network side, can abandon this SDU earlier, identify other SDU that belongs to a frame of video with this SDU then, abandon other SDU that these and this SDU belongs to a frame of video then.
When network side identification belongs to other SDU of a frame of video with the current SDU that obtains, can identify other SDU that belongs to a frame of video with the current SDU that obtains by the method for video frame boundary identification.In addition, can also realize by frame identification.Wherein, transmitting terminal will carry identical frame identification in will being wrapped by the RTP that same frame of video splits, and be the RTP bag that the carrier carrying carries frame identification with SDU, network side identifies other SDU that belongs to a frame of video with the current SDU that obtains according to this frame identification.
Embodiment four
See also Fig. 5, Fig. 5 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention four.Corresponding with the transmission method of above-mentioned a kind of video data, the embodiment of the invention four provides a kind of transmitting device of video data.This device comprises acquiring unit 501, first processing unit 502 and second processing unit 503.
Wherein, acquiring unit 501 is used to obtain service data unit SDU;
Said apparatus also comprises predicting unit, is used to predict whether described SDU time delay can take place;
Also may further include transmitting element, be used for time-delay when described SDU does not take place, send described SDU.
As can be seen from the above-described embodiment, present embodiment is except the beneficial effect with the foregoing description two, owing to the SDU that obtains when network side the time delay packet loss can take place the time, the time delay packet loss can take place in other SDU too that belong to a frame of video with this SDU together, therefore, after the SDU that abandons meeting generation time delay packet loss, further directly abandon other SDU that belongs to a frame of video with described SDU, avoided repeating judging whether SDU the time delay packet loss can take place and abandon the action of SDU, thereby can reduce network overhead.
Embodiment five
See also Fig. 6, Fig. 6 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention five.
In the streaming media video business, one group of continuous video frames constitutes a GOP (Group ofPictures, picture group), and a picture is exactly a frame of video.Frame of video can be divided into I frame, P frame, B frame according to type.A GOP is made up of a string frame of video that with the I frame is start frame.Wherein, what the I frame adopted is intraframe coding, is interframe encode and P frame and B frame adopt, that is, when transmitting terminal is encoded, the coded reference of B frame come nearest I frame in its front or P frame and come nearest I frame in its back or P frame; The coded reference of P frame come nearest I frame in its front or P frame.When receiving terminal was decoded, the I frame can be decoded alone according to coded message, and P frame and B frame must obtain its when coding used reference frame information just can decode.
Because the coding of P frame and B frame is all with reference to the I frame, the time delay packet loss of I frame not only makes these frame data to be correctly decoded, and also can influence being correctly decoded of interior other video requency frame datas of this GOP, causes video mosaic phenomenon to occur and influences video quality.So when I frame generation time delay packet loss, its video quality to receiving terminal has the greatest impact; And in the process of coding, the B frame is as the reference frame of any frame of video, so, when B frame generation time delay packet loss, the quality influence minimum of the video that it is play receiving terminal.When the P frame produced the time delay packet loss, though its coverage does not have the I frame big, the video data that also can cause being positioned at this P frame back in this GOP can not be correctly decoded.
When the frame of video under network side is judged the SDU that the time delay packet loss will take place is I frame or P frame, reference frame as other frame of video among this GOP, if abandoned by network side, also can cause other frame of video can't be by correct decoding at receiving terminal, network side can't be received proper true decoded video frames with these and be transferred to receiving terminal, certainly will also can further waste the efficiency of transmission of transmission network.Therefore, network side will with reference to the I frame or other frame of video of P frame abandons in the lump, also can improve the efficiency of transmission of transmission network.
Method in the present embodiment may further comprise the steps:
Step 601: obtain SDU;
Step 602: predict whether described SDU time delay can take place, if enter step 603;
Wherein, time-delay when the described SDU of prediction can not take place sends described SDU.After sending described SDU, can execution in step 601, continue to obtain next SDU.
Step 603: time-delay when SDU can take place abandons described SDU;
Step 604: abandon other SDU that belongs to a frame of video with described SDU;
Step 605: judge whether the frame of video under the current SDU that obtains is the I frame, if enter step 606;
Step 606:, abandon other frame of video that belongs to same picture group with described I frame if the frame of video under the current SDU that obtains is the I frame.
If the described frame of video of the current SDU that obtains is the P frame, after the P frame abandons, also can abandon other frame of video that belongs to same picture group thereafter.Its execution mode for example, can replace with the step 605 of the foregoing description whether the frame of video of judging under the current SDU that obtains is the P frame, if abandon other frame of video that belongs to same picture group with described P frame.If the frame of video that step 606 replaces with under the current SDU that obtains is the P frame, abandon other frame of video that belongs to same picture group with described P frame.
Judge that whether frame of video that described meeting delays is the P frame and abandons thereafter other frame of video, judge that whether frame that described meeting delays is the I frame and abandons thereafter other frame of video, these two steps also can realize in same embodiment.Wherein, the judgement of the judgement of embodiment of the invention I frame and P frame does not have sequencing, can judge earlier whether the described frame of delaying is the P frame, when the described frame of delaying is the P frame, judge that more whether frame that described meeting delays is the I frame and abandons thereafter other frame of video; Perhaps earlier judge whether the described frame of delaying is the I frame, when the described frame of delaying is the I frame, judge that more whether frame that described meeting delays is the P frame and abandons thereafter other frame of video.
If the frame of video generation time delay under the current SDU that obtains, this frame of video is I or P frame, and all other frame of video that belong to same video group for after I frame or the P frame both can all abandon, and also can only abandon a part of frame of video.Because if the frame of video that abandons is too much, may impact play quality.For example,, can only abandon 12 frame of video thereafter,, only abandon 6 frame of video thereafter, as long as these frame of video belong to same picture group for the P frame for the I frame.
When network side abandon belong to other frame of video of same picture group with described I frame or P frame after, can execution in step 601, continue to obtain next SDU.If the described current SDU that time delay can take place does not belong to the P frame, when not belonging to the I frame yet, also can execution in step 601, continue to obtain next SDU.
Embodiment six
See also Fig. 7, corresponding with the transmission method of above-mentioned a kind of video data, the embodiment of the invention also provides a kind of transmitting device of video data.Fig. 7 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention six, and this device comprises acquiring unit 701, predicting unit 702, first processing unit 703, second processing unit 704 and the 3rd processing unit 705.
Wherein, acquiring unit 701 is used to obtain service data unit SDU;
Predicting unit 702 is used to predict whether described SDU time delay can take place;
The 3rd processing unit 705 is used for whether the frame of video that judgement can take place under the SDU of time delay is the I frame, if the frame of video under the described SDU is the I frame, abandons other frame of video that belongs to same picture group with described I frame.
Wherein, the 3rd processing unit 705 can also replace with and manage the unit everywhere, the manages everywhere whether the frame of video that the unit is used under time delay can take place in judgement the SDU is the P frame, if the frame of video under the described SDU is the P frame, abandons other frame of video that belongs to same picture group with described P frame.Present embodiment can comprise simultaneously that also the 3rd processing unit and manages the unit everywhere.
Said apparatus can also comprise transmitting element, is used for time-delay when described SDU does not take place, and sends described SDU.
By in the above-mentioned enforcement as can be seen, present embodiment is except the beneficial effect with above-mentioned second embodiment, because other frame of video of encoding with reference to this I frame or P frame in same picture group can be by correct decoding at receiving terminal yet, therefore, when identifying as with reference to the I frame of frame and P frame generation time delay packet loss the time, network side abandons other frame of video that belongs to same picture group with described I frame or P frame.Make these frame of video can't take eating dishes without rice or wine of transmission network, further saved the interface-free resources of transmission network, improved the efficiency of transmission of transmission network.
Embodiment seven
See also Fig. 8, Fig. 8 is the flow chart of the transmission method of a kind of video data of disclosing of the embodiment of the invention seven.
The difference of present embodiment and the foregoing description five is, after the frame of video under the current SDU that obtains of judgement is I frame or P frame, whether the number of further judging the frame of video between last frame of the picture group that described I frame or P frame and described I frame or P frame are affiliated is less than first critical value or second critical value, if abandon other frame of video that belongs to same picture group with described I frame or P frame.Specifically may further comprise the steps:
Step 801: obtain SDU;
Step 802: predict whether described SDU time delay can take place, if enter step 803;
Wherein, time-delay when the described SDU of prediction can not take place sends described SDU.After transmission finishes, can carry out 801, obtain next SDU.
Step 803: time-delay when SDU can take place abandons described SDU;
Step 804: abandon other SDU that belongs to a frame of video with described SDU;
Step 805: judge whether the frame of video under the current SDU that obtains is the I frame, if enter step 806;
If not, can carry out 801, obtain next SDU.
Step 806: whether the number of judging the frame of video between last frame of the picture group under described I frame and the described I frame is less than first critical value, if enter step 807;
In same picture group, if the frame of video of I frame back is many, the frame of video that abandons this I frame back will influence the quality of broadcast, therefore need carry out suitable restriction, and too much frame of video prevents loss.The size of first critical value determines according to actual conditions, if bandwidth is less, neither be very high for the quality requirement of video, just can first critical value be provided with bigger, otherwise, just need the smaller of setting.In the present embodiment, first critical value can be made as 12.
Concrete steps are as follows: when the frame of video number between last frame of video of described current I frame and this GOP less than 12 the time, judge that frame of video number between last frame of video of current I frame and this GOP is less than first critical value; When the frame of video number between last frame of video of described current I frame and this GOP greater than 12 the time, judge that the frame of video number between last frame of video of current I frame and this GOP is not less than first critical value.When judging that the frame of video number of current I frame pitch between last frame of video of this GOP is not less than critical value, network side sends the frame of video that does not send among this GOP, and obtains the SDU of next GOP again.
In order to satisfy the video effect of desiring to reach, set different threshold values for different video frame types in advance, first critical value is an I frame preset threshold for satisfying the video effect of desiring to reach, and second critical value is a P frame preset threshold for satisfying the video effect of desiring to reach.For example,, abandon all frame of video that do not send among this GOP when the frame of video number between last frame of video of current I frame and this GOP during greater than first critical value, bigger to the video playback influential effect of receiving terminal.Frame of video number between last frame of video of current I frame and this GOP is during less than first critical value, and it is not less to the video playback influential effect of receiving terminal to abandon all frame of video that send among this GOP.
Present embodiment adopts 12 to be a scheme as first critical value, does not constitute the qualification to first critical value.
Above-mentioned steps 805 can replace with whether the frame of video of judging under the current SDU that obtains is the P frame, whether step 806 replaces with the number of the frame of video between last frame of judging the picture group under described P frame and the described P frame less than second critical value, if enter step 807.The purpose of setting second critical value is consistent with the purpose of setting first critical value, the too much frame of video that prevents loss, the quality that influence is play.For example, second critical value can be made as 6.
When the frame of video number between last frame of video of described current P frame and this GOP less than 6 the time, judge that frame of video number between last frame of video of current P frame and this GOP is less than second critical value; When the frame of video number between last frame of video of described current P frame and this GOP greater than 6 the time, judge that the frame of video number of current P frame pitch between last frame of video of this GOP is not less than second critical value.When the frame of video number between last frame of video of judging current P frame and this GOP is not less than second critical value, network side sends the frame of video that does not send among this GOP, and obtain the SDU of next GOP again, dispose up to all video datas.
Equally, present embodiment adopts 6 to be a scheme as second critical value, does not constitute the qualification to second critical value.
Step 807: abandon other frame of video that belongs to same picture group with described I frame.
Wherein, judge when above-mentioned steps 805 whether described frame of video is the P frame, step 807 replaces with and abandons other frame of video that belongs to same picture group with described P frame.
Embodiment eight
Corresponding with the transmission method of a kind of video data in the foregoing description seven, the embodiment of the invention also provides a kind of transmitting device of video data.See also Fig. 9, Fig. 9 is the structure chart of the transmitting device of a kind of video data of disclosing of the embodiment of the invention eight, and this device comprises acquiring unit 901, predicting unit 902, first processing unit 903, second processing unit 904, the 3rd processing unit 905 and the 5th processing unit 906.
Wherein, acquiring unit 901 is used to obtain service data unit SDU;
Predicting unit 902 is used to predict whether described SDU time delay can take place;
The 3rd processing unit 905 is used to judge whether the frame of video under the described SDU is the I frame, if the frame of video under the described SDU is the I frame, triggers the 5th processing unit;
The 5th processing unit 906, be used to judge whether the frame of video under the described SDU is the I frame, if the frame of video under the described SDU is the I frame, whether the number of judging the frame of video between last frame of the picture group under described I frame and the described I frame is less than first critical value, if whether the number of the frame of video between last frame of the picture group under described I frame and the described I frame abandons other frame of video of with described I frame belonging to same picture group less than first critical value.
Wherein, the 5th processing unit 906 can also replace with the 6th processing unit, be used for whether the frame of video that judgement can take place under the SDU of time delay is the P frame, if the frame of video under the described SDU is the P frame, whether the number of judging the frame of video between last frame of the picture group under described P frame and the described P frame is less than second critical value, if whether the number of the frame of video between last frame of the picture group under described P frame and the described P frame abandons other frame of video of with described P frame belonging to same picture group less than second critical value.
Said apparatus can also comprise transmitting element, is used for time-delay when described SDU does not take place, and sends described SDU.
As can be seen from the above-described embodiment, present embodiment is except the beneficial effect with the foregoing description five, considered that also network side directly abandons with described I frame or P frame and belongs to the influence of other frame of video of same picture group to video effect when identifying as with reference to the I frame of frame or P frame generation time delay packet loss the time.Whether the number by the frame of video between further last frame of judging the picture group under described I frame and the described I frame is less than first critical value, or whether the number of judging the frame of video between last frame of the picture group under described P frame and the described P frame is less than second critical value, if, abandon other frame of video that belongs to same picture group with described I frame or P frame, thereby make receiving terminal when video playback, the reason frame of video does not abandon too many and has a strong impact on result of broadcast.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, and this program comprises the steps: to obtain the service data unit SDU that does not send to receiving terminal as yet; Time-delay abandons described SDU when described SDU can take place.Described storage medium comprises: ROM/RAM, magnetic disc, CD etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (16)
1, a kind of transmission method of video data is characterized in that, described method comprises:
Obtain service data unit SDU;
When time delay can take place described SDU, abandon described SDU.
2, method according to claim 1 is characterized in that, described method also comprises:
When time delay can take place described SDU, the SDU that abandons participant generation time delay belongs to other SDU of same frame of video.
3, method according to claim 1 is characterized in that, described method also comprises: if the described affiliated frame of video of SDU that time delay can take place is the I frame, then abandon other frame of video that belongs to same picture group with described I frame.
4, method according to claim 1 is characterized in that, described method also comprises:
If the described affiliated frame of video of SDU that time delay can take place is the P frame, then abandon other frame of video that belongs to same picture group with described P frame.
5, method according to claim 1 is characterized in that, described method also comprises:
If the described affiliated frame of video of SDU that time delay can take place is the I frame, whether the number of judging the frame of video between last frame of the picture group under described I frame and the described I frame is less than first critical value, if the number of the frame of video between last frame of the picture group under described I frame and the described I frame abandons other frame of video that belongs to same picture group with described I frame less than first critical value.
6, method according to claim 1 is characterized in that, described method also comprises:
If the described affiliated frame of video of SDU that time delay can take place is the P frame, whether the number of judging the frame of video between last frame of the picture group under described P frame and the described P frame is less than second critical value, if the number of the frame of video between last frame of the picture group under described P frame and the described P frame abandons other frame of video that belongs to same picture group with described P frame less than second critical value.
7, according to any described method of claim 1-6, it is characterized in that described method also comprises:
After obtaining described service data unit SDU, abandon before the described SDU, predict whether described SDU time delay can take place.
8, method according to claim 7 is characterized in that, described method also comprises:
When described SDU time delay can not take place, send described SDU.
9, a kind of transmitting device of video data is characterized in that, described device comprises:
Acquiring unit is used to obtain service data unit SDU;
First processing unit is used for as the SDU that described acquiring unit obtains time delay taking place, and abandons described SDU.
10, device according to claim 9 is characterized in that, described device also comprises:
Second processing unit, the SDU that is used to abandon participant generation time delay belongs to other SDU of same frame of video.
11, device according to claim 9 is characterized in that, described device also comprises:
The 3rd processing unit if the described affiliated frame of video of SDU that time delay can take place is the I frame, abandons other frame of video that belongs to same picture group with described I frame.
12, device according to claim 9 is characterized in that, described device also comprises:
The manages the unit everywhere, if the frame of video under the SDU of described generation time delay is the P frame, abandons other frame of video that belongs to same picture group with described P frame.
13, device according to claim 9 is characterized in that, described device also comprises:
The 5th processing unit, if the described affiliated frame of video of SDU that time delay can take place is the I frame, whether the number of judging the frame of video between last frame of the picture group under described I frame and the described I frame is less than first critical value, if whether the number of the frame of video between last frame of the picture group under described I frame and the described I frame abandons other frame of video of with described I frame belonging to same picture group less than first critical value.
14, device according to claim 9 is characterized in that, described device also comprises:
The 6th processing unit, be used for whether the frame of video that judgement can take place under the SDU of time delay is the P frame, if the frame of video under the described SDU is the P frame, whether the number of judging the frame of video between last frame of the picture group under described P frame and the described P frame is less than second critical value, if whether the number of the frame of video between last frame of the picture group under described P frame and the described P frame abandons other frame of video of with described P frame belonging to same picture group less than second critical value.
15, according to any described device of claim 9-14, it is characterized in that described device also comprises:
Predicting unit is used to predict whether described SDU time delay can take place.
16, device according to claim 15 is characterized in that, described device also comprises:
Transmitting element is used for time-delay when described SDU can not take place, and sends described SDU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102024630A CN101409832B (en) | 2008-11-06 | 2008-11-06 | Transmission method and apparatus for video data |
Applications Claiming Priority (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111669599A (en) * | 2020-06-18 | 2020-09-15 | Oppo广东移动通信有限公司 | Video decoding method, video decoding device and terminal equipment |
| WO2024017395A1 (en) * | 2022-07-22 | 2024-01-25 | 中国移动通信有限公司研究院 | Data processing method and apparatus, and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111669599A (en) * | 2020-06-18 | 2020-09-15 | Oppo广东移动通信有限公司 | Video decoding method, video decoding device and terminal equipment |
| WO2024017395A1 (en) * | 2022-07-22 | 2024-01-25 | 中国移动通信有限公司研究院 | Data processing method and apparatus, and communication device |
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