CN104703053A - Packet loss processing method, device and system of video transmission process - Google Patents
Packet loss processing method, device and system of video transmission process Download PDFInfo
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Abstract
The invention discloses a packet loss processing method, a packet loss processing device and packet loss processing system of a video transmission process. The method comprises the following steps: detecting whether a data packet of a video frame has packet loss, the video frame is received at present, if having packet loss, stopping video decoding and informing a video sending end for performing a video updating operation; detecting whether the updated video frame sent by the video sending end is received, and decoding the updated video frame after receiving the updated video frame. According to the technical scheme, the decoding process is stopped immediately while the packet loss is detected for some video frame, the image flower screen phenomenon is avoided, the video sending end is informed for updating the video and the Caton time is reduced to the minimum. The video playing efficiency and the user experience are improved by adopting the method.
Description
Technical field
The present invention relates to communication technical field, particularly relate to loss treating method, device and system in a kind of video transmitting procedure.
Background technology
Along with the development of Internet, people wish to transmit more multimedia messages online.The transmission of vision signal is the core of Transmitting of Multi-media Information.Carrying out the situation that data packetloss often can occur in data transmission procedure especially wireless in video transmitting procedure, image flower screen will caused like this, block phenomenons such as timing, affect the perception of user greatly.So, how to provide a solution when there is data packetloss, can avoid flower screen, and at utmost reducing Caton phenomenon, becoming technical problem to be solved by this invention.
Summary of the invention
In view of the above problems, the present invention is proposed to provide loss treating method, device and system in a kind of video transmitting procedure solved the problem.
According to one aspect of the present invention, loss treating method in a kind of video transmitting procedure is provided, comprises:
Whether the packet detecting the frame of video of current reception there is packet loss, and when there is packet loss, stopping video decode and notifying that video sending end carries out video renewal;
Detect the frame of video after the renewal whether receiving the transmission of described video sending end, and when receiving, start to decode the frame of video after upgrading.
Alternatively, in the method for the invention, whether the packet of the frame of video of the current reception of described detection there is the mode of packet loss, comprising:
Detect the sequence number of the packet of the frame of video of current reception, if number discontinuous at the sequence of data packet of front reception and current reception, then judge packet loss occurs, otherwise packet loss does not occur.
Alternatively, in the method for the invention, described stopping video decode, comprising: the packet of frame of video of packet loss will occur, and the data packet discarding of the frame of video received to this time period before the frame of video after receiving renewal after packet loss occurs.
Alternatively, in the method for the invention, whether described detection receives the frame of video after the renewal of described video sending end transmission, comprising:
Whether the type detecting the frame of video received is key frame, if key frame, is then judged to be the frame of video after receiving renewal; Otherwise, be judged to be the frame of video after not receiving renewal.
According to another aspect of the present invention, loss treating method in a kind of video transmitting procedure is also provided, comprises:
Frame of video is sent to video receiver in the mode of packet, and when receiving the video update notification that described video receiver sends, based on current video image, again framing, and the frame of video after restructuring is sent to video receiver as the frame of video after renewal.
Alternatively, in the method for the invention, described based on current video image, again framing, comprising: the starting point with current video image being again framing, generate key frame and reference frame.
According to the 3rd aspect of the present invention, a kind of video receiver is provided, comprises:
Whether packet loss detection module, there is packet loss for the packet detecting the frame of video of current reception, and when there is packet loss, trigger packet loss processing module;
Packet loss processing module, for stopping video decode and notifying that video sending end carries out video renewal, and detects the frame of video after the renewal whether receiving the transmission of described video sending end, and when receiving, starts to decode the frame of video after upgrading.
Alternatively, in video receiver of the present invention, described packet loss processing module, specifically for detecting whether the type of the frame of video received is key frame, if key frame, is then judged to be the frame of video after receiving renewal; Otherwise, be judged to be the frame of video after not receiving renewal.
According to the 4th aspect of the present invention, a kind of video sending end is also provided, comprises:
Frame of video sending module, sends frame of video for the mode with packet to video receiver;
Frame of video update module, for when receiving the video update notification that described video receiver sends, based on current video image, again framing, and using the frame of video after restructuring as the frame of video after renewal, triggers described frame of video sending module.
Alternatively, in video sending end of the present invention, described frame of video update module, specifically for current video image being again the starting point of framing, generates key frame and reference frame, to realize framing again.
According to the 5th aspect of the present invention, the system of packet loss process in a kind of video transmitting procedure is also provided, comprises video receiver of the present invention, and video sending end of the present invention.
Beneficial effect of the present invention is as follows:
Scheme of the present invention, after detecting that certain frame of video has packet loss, by stopping decoding, avoids image Huaping phenomenon, carries out video renewal, can drop to minimum by card immediately by notice video sending end.Visible, method described in the present embodiment improves video playback efficiency, improves user's experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The flow chart of loss treating method in a kind of video transmitting procedure that Fig. 1 provides for the embodiment of the present invention one;
The flow chart of loss treating method in a kind of video transmitting procedure that Fig. 2 provides for the embodiment of the present invention two;
The flow chart of loss treating method in a kind of video transmitting procedure that Fig. 3 provides for the embodiment of the present invention three;
Fig. 4 is the video frame transmission schematic diagram without the method for the invention process;
Fig. 5 is the video frame transmission schematic diagram after the method for the invention process
The structural representation of a kind of video receiver that Fig. 6 provides for the embodiment of the present invention four;
The structural representation of a kind of video sending end that Fig. 7 provides for the embodiment of the present invention five.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The embodiment of the present invention provides loss treating method in a kind of video transmitting procedure, is applied in video reception side, and as shown in Figure 1, described method specifically comprises:
Step S101, whether the packet detecting the frame of video of current reception there is packet loss, and when there is packet loss, stopping video decode and notifying that video sending end carries out video renewal;
In this step, the mode whether packet detecting the frame of video of current reception packet loss occurs include but not limited to into:
Detect the sequence number of the packet of the frame of video of current reception, if number discontinuous at the sequence of data packet of front reception and current reception, then judge packet loss occurs, otherwise packet loss does not occur.
Further, in this step, preferably, by the packet of the frame of video by there is packet loss, and the mode of the data packet discarding of the frame of video received to this time period before the frame of video after receiving renewal after packet loss occurs, realize stopping video decode.
Further, because frame of video is divided into key frame and reference frame two kinds, key frame can be decoded separately; And reference frame will be correctly decoded, must with reference to former key frame and reference frame.And video flowing keeps continuous print from some key frames, so, in the present embodiment, notice video sending end carries out video renewal, Specifically, refer to that notice video sending end carries out framing again, again keep continuously from a key frame to make video flowing.
Step S102, detects the frame of video after the renewal whether receiving the transmission of described video sending end, and when receiving, starts to decode the frame of video after upgrading.
In this step, the mode detecting the frame of video after the renewal whether receiving the transmission of described video sending end comprises: whether the type detecting the frame of video received is key frame, if key frame, is then judged to be the frame of video after receiving renewal; Otherwise, be judged to be the frame of video after not receiving renewal.
In sum, method described in known the present embodiment, after detecting that certain frame of video has packet loss, by stopping decoding, avoid image Huaping phenomenon, carry out video renewal by notice video sending end, card can be dropped to immediately minimum (be usually no more than 100ms, the card of user to this duration pause usual unaware).Visible, method described in the present embodiment improves video playback efficiency, improves user's experience.
Embodiment two
The embodiment of the present invention provides loss treating method in a kind of video transmitting procedure, is applied in video sending end side, and as shown in Figure 2, described method specifically comprises:
Step S201, sends frame of video in the mode of packet to video receiver;
Step S202, when receiving the video update notification that video receiver sends, based on current video image, again framing, and using the frame of video after restructuring as the frame of video after renewal, is sent to video receiver in the mode of packet.
In this step, based on current video image, again framing, specifically comprise: the starting point with current video image being again framing, generate key frame and reference frame.That is, after framing again, video flowing keeps continuously again from a key frame.
Method described in the present embodiment, for card drops to minimum when frame of video packet loss by video receiver immediately, provides crucial technical support.
Embodiment three
The embodiment of the present invention provides loss treating method in a kind of video transmitting procedure, and it, by providing a concrete example, is described in detail to implementation process of the present invention, better to support the scheme described in embodiment one, two.It should be noted that, ins and outs disclosed in the present embodiment in order to explain the present invention, and are not used in and uniquely limit the present invention.
In the present embodiment, make between video sending end and video receiver and adopt Real-time Transport Protocol transmitting video-frequency flow, and have the sequence number of current bag in each RTP packet, and sequence number increases progressively by the sending order of bag.
As shown in Figure 3, described in the present embodiment, method comprises the steps:
Step S301, video sending end sends frame of video according to Real-time Transport Protocol to video receiver;
Step S302, whether the packet that video receiver detects the frame of video received there is packet loss, if not, then continues follow-up decode operation; If generation packet loss, then go to step S303;
In this step, by detecting the sequence number of packet, if find that sequence number is discontinuous, illustrating that packet loss occurs, packet loss fault-tolerant processing started.
Step S303, video receiver sends the information order VFU (video fast update) in SIP hello protocol to video sending end, notifies the other side's more new video (namely asking the other side to send a new key frame immediately) immediately; Meanwhile, the packet of frame of video received during the packet that frame of video of packet loss occurs and the video upgraded at wait-receiving mode is all discarded, does not give decoder.
Step S304, after video sending end receives VFU message, gives an order to immediately its video encoder, makes video encoder be key frame (I frame) by up-to-date encoding video pictures immediately, then this key frame is transferred to video receiver.
Step S305, the key frame that video receiver receiver, video transmitting terminal sends, recovers decoding normal condition, gives decoder processes by this key frame and later video requency frame data.
Wherein, video receiver be by frame synchronization head judge receive whether be key frame.Such as: for H264 video flowing, it is 0x00 0x00 0x00 0x01 0x67 or 0x000x00 0x00 0x01 0x65 that key frame starts several byte, and reference frame starts several byte is 0x00 0x00 0x00 0x01 0x41.
As Fig. 4 and Fig. 5 is respectively without the method for the invention process and the decoding schematic diagram after the method for the invention process, by also finding out in figure, notify that the other side sends new key frame immediately after there is packet loss, new key frame can be received soon and recover normal.Video card is generally no more than 100 milliseconds immediately, and user can discover out at all any exception.
Embodiment four
The embodiment of the present invention provides a kind of video receiver, as shown in Figure 6, specifically comprises:
Whether packet loss detection module 610, there is packet loss for the packet detecting the frame of video of current reception, and when there is packet loss, trigger packet loss processing module;
Packet loss processing module 620, for stopping video decode and notifying that video sending end carries out video renewal, and detects the frame of video after the renewal whether receiving the transmission of described video sending end, and when receiving, starts to decode the frame of video after upgrading.
Based on said structure framework and enforcement principle, provide several concrete and preferred implementation under the above constitution below, in order to refinement and the function optimizing video receiver of the present invention, to make the enforcement of the present invention program more convenient, accurately.Be specifically related to following content:
In the present embodiment, whether the packet that packet loss detection module 610 detects the frame of video of current reception there is the mode of packet loss, comprising:
Detect the sequence number of the packet of the frame of video of current reception, if number discontinuous at the sequence of data packet of front reception and current reception, then judge packet loss occurs, otherwise packet loss does not occur.
Further, in the present embodiment, packet loss processing module 620 is by the packet of the frame of video by there is packet loss, and the mode of the data packet discarding of the frame of video received to this time period before the frame of video after receiving renewal after packet loss occurs stops video decode.
Further, in the present embodiment, notice video sending end carries out video renewal, Specifically, refers to that notice video sending end carries out framing again, again keeps continuously from a key frame to make video flowing.
Further, in the present embodiment, packet loss processing module 620, specifically for detecting whether the type of the frame of video received is key frame, if key frame, is then judged to be the frame of video after receiving renewal; Otherwise, be judged to be the frame of video after not receiving renewal.
In sum, video receiver described in known the present embodiment, after detecting that certain frame of video has packet loss, by stopping decoding, avoid image Huaping phenomenon, carry out video renewal by notice video sending end, card can be dropped to immediately minimum (be usually no more than 100ms, the card of user to this duration pause usual unaware).Visible, method described in the present embodiment improves video playback efficiency, improves user's experience.
Embodiment five
The embodiment of the present invention provides a kind of video sending end, as shown in Figure 7, comprising:
Frame of video sending module 710, sends frame of video for the mode with packet to video receiver;
Frame of video update module 720, for when receiving the video update notification that described video receiver sends, based on current video image, again framing, and using the frame of video after restructuring as the frame of video after renewal, triggers described frame of video sending module 710.
Wherein, frame of video update module 720, specifically for current video image being again the starting point of framing, generates key frame and reference frame, to realize framing again.That is, after framing again, video flowing keeps continuously again from a key frame.
Video sending end described in the present embodiment, for card drops to minimum when frame of video packet loss by video receiver immediately, provides crucial technical support.
Embodiment six
The present embodiment provides the system of packet loss process in a kind of video transmitting procedure, comprises the video receiver described in embodiment four, and the video sending end described in embodiment five.
Due to embodiment four, five to the concrete structure of video receiver and video sending end, implement principle and technique effect elaborates, so the present embodiment does not repeat them here.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (11)
1. a loss treating method in video transmitting procedure, is characterized in that, comprising:
Whether the packet detecting the frame of video of current reception there is packet loss, and when there is packet loss, stopping video decode and notifying that video sending end carries out video renewal;
Detect the frame of video after the renewal whether receiving the transmission of described video sending end, and when receiving, start to decode the frame of video after upgrading.
2. the method for claim 1, is characterized in that, whether the packet of the frame of video of described detection current reception the mode of packet loss occurs, and comprising:
Detect the sequence number of the packet of the frame of video of current reception, if number discontinuous at the sequence of data packet of front reception and current reception, then judge packet loss occurs, otherwise packet loss does not occur.
3. method as claimed in claim 1 or 2, it is characterized in that, described stopping video decode, comprising: the packet of frame of video of packet loss will occur, and the data packet discarding of the frame of video received to this time period before the frame of video after receiving renewal after packet loss occurs.
4. method as claimed in claim 1 or 2, is characterized in that, whether described detection receives the frame of video after the renewal of described video sending end transmission, comprising:
Whether the type detecting the frame of video received is key frame, if key frame, is then judged to be the frame of video after receiving renewal; Otherwise, be judged to be the frame of video after not receiving renewal.
5. a loss treating method in video transmitting procedure, is characterized in that, comprising:
Frame of video is sent to video receiver in the mode of packet, and when receiving the video update notification that described video receiver sends, based on current video image, again framing, and the frame of video after restructuring is sent to video receiver as the frame of video after renewal.
6. method as claimed in claim 5, is characterized in that, described based on current video image, again framing, comprising: the starting point with current video image being again framing, generates key frame and reference frame.
7. a video receiver, is characterized in that, comprising:
Whether packet loss detection module, there is packet loss for the packet detecting the frame of video of current reception, and when there is packet loss, trigger packet loss processing module;
Packet loss processing module, for stopping video decode and notifying that video sending end carries out video renewal, and detects the frame of video after the renewal whether receiving the transmission of described video sending end, and when receiving, starts to decode the frame of video after upgrading.
8. video receiver as claimed in claim 7, is characterized in that, described packet loss processing module, specifically for detecting whether the type of the frame of video received is key frame, if key frame, is then judged to be the frame of video after receiving renewal; Otherwise, be judged to be the frame of video after not receiving renewal.
9. a video sending end, is characterized in that, comprising:
Frame of video sending module, sends frame of video for the mode with packet to video receiver;
Frame of video update module, for when receiving the video update notification that described video receiver sends, based on current video image, again framing, and using the frame of video after restructuring as the frame of video after renewal, triggers described frame of video sending module.
10. video sending end as claimed in claim 9, is characterized in that, described frame of video update module, specifically for current video image being again the starting point of framing, generates key frame and reference frame, to realize framing again.
The system of packet loss process in 11. 1 kinds of video transmitting procedure, is characterized in that, comprises the video receiver described in claim 7 to 8 any one, and the video sending end described in claim 9 to 10.
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Application publication date: 20150610 |