CN105263066A - Mobile equipment video stream transmission control method and system - Google Patents
Mobile equipment video stream transmission control method and system Download PDFInfo
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- CN105263066A CN105263066A CN201410263758.4A CN201410263758A CN105263066A CN 105263066 A CN105263066 A CN 105263066A CN 201410263758 A CN201410263758 A CN 201410263758A CN 105263066 A CN105263066 A CN 105263066A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
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- Computer Security & Cryptography (AREA)
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Abstract
The invention provides a mobile equipment video stream transmission control method and system. The method comprises the following steps: in a video stream transmission process, detecting a network detection parameter of a transmission network in real time; and performing adjustment processing on a video and the network transmission parameter once again according to the network detection parameter, wherein the adjustment processing of the video and the network transmission parameter includes parameter adjustment relevant to a video encoding end and parameter adjustment of a wireless chip network driver. According to the method and the system, a preset threshold level satisfied by the network detection parameter in a threshold table is calculated according to a weight ratio of the network detection parameter, and a frame rate, a code rate and a display resolution are adjusted according to the preset threshold level, so that low delay and smoothness of video playing are ensured and can be recovered rapidly under the situation of not influencing or slightly lowering the image quality. Through detection of a flag bit used for distinguishing whether video stream data belong to a B frame or a P frame and output by a video encoder, transmission of video key frames can be ensured, thereby ensuring the reliable image quality, and providing good user experience.
Description
Technical field
The present invention relates to the digital of digital video data transmission field of wireless network, particularly relate to mobile device video streaming control method and system.
Background technology
Along with iOS (IphoneOperatingSystem, Apple Macintosh operating system) and the rise of the intelligent system such as Android (Android operation system), mobile device (smart mobile phone, panel computer) function from strength to strength, due to the restriction of mobile device screen, a lot of entertainment content is (as video, real-time recording or game) need the equipment being transferred to large-screen to go to play display, the normally direct transport stream contents of media files of these contents, or the buffer (buffer) of grasping system display in real time, the display of decoding device end is sent to by coding and decoding video, this just proposes new challenge to the performance of mobile device and the performance of real time streaming framework.
Current mobile device transmit in a wireless local area network high-resolution, high code check live video stream time, if wireless network environment is slightly poor, WIFI (WirelessFidelity, wireless network transmission technology) throughput can serious reduce, cause video playback time delay increasing, Ka Dun and Hua Ping is serious.
Summary of the invention
Pause for conventional art video render card and spend the problem of shielding, the invention provides mobile device video streaming control method and the system of a kind of video render low delay and good image quality.
For reaching technical purpose, the embodiment of the present invention provides a kind of mobile device video streaming control method, comprises the following steps:
In video streaming process, detect the network detected parameters of transmission network in real time;
Again process is adjusted to video and network transmission parameter according to described network detected parameters;
Described video comprises the parameter adjustment of the parameter adjustment relevant to Video coding end and wireless chip network-driven with the adjustment process of network transmission parameter.
As a kind of embodiment, the network detected parameters of described real-time detection transmission network, comprises the steps:
The internal transmission statistical parameter of real-time detection wireless chip network-driven, as the first input;
Data buffer total after the encapsulation of real-time detection current Streaming Media uses size, as the second input;
The free memory of real-time detection current system, as the 3rd input;
The parameter adjustment of decision-making video encoder and the predetermined threshold value grade of display resolution adjustment is deposited, as the 5th input in threshold value table;
The weight ratio of weight ratio > the 3rd input of weight ratio > second input of described first input.
As a kind of embodiment, the internal transmission statistical parameter of described wireless chip network-driven comprises 802.11 frame number of retransmissions are per second, packet number of dropped packets is per second, receive signal strength signal intensity instruction and transmission buffering area surplus.
As a kind of embodiment, describedly carry out the parameter adjustment relevant to Video coding end according to described network detected parameters, comprise the steps:
Judge the predetermined threshold value grade that described first input, the second input and the 3rd input meet in the threshold value table of the 5th input;
The parameter of video encoder and display resolution according to the described predetermined threshold value level adjustment met.
As a kind of embodiment, also comprise the steps:
The differentiation video stream data that the described video encoder of real-time detection exports is the flag bit of P frame or B frame, as the 4th input;
Carry out the parameter adjustment of wireless chip network-driven according to described network detected parameters, comprise the steps:
The scan mode arranging wireless chip network-driven according to described flag bit is drive sweep, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions.
The embodiment of the present invention also provides a kind of mobile device video streaming control system, comprise real-time Transmission processing module, for in video streaming process, the network detected parameters of real-time detection transmission network, adjusts process to video and network transmission parameter again according to described network detected parameters;
Described video comprises the parameter adjustment of the parameter adjustment relevant to Video coding end and wireless chip network-driven with the adjustment process of network transmission parameter.
As a kind of embodiment, described real-time Transmission processing module comprises the first input unit, the second input unit, the 3rd input unit and the 5th input unit, wherein:
Described first input unit, for detecting the internal transmission statistical parameter that wireless chip networking drives in real time;
Described second input unit, uses size for detecting the rear total data buffer of current Streaming Media encapsulation in real time;
Described 3rd input unit, for detecting the free memory of current system in real time;
Described 5th input unit, the predetermined threshold value grade that parameter adjustment and display resolution for depositing decision-making video encoder adjust;
The weight ratio of weight ratio > the 3rd input unit of weight ratio > second input unit of described first input unit.
As a kind of embodiment, the internal transmission statistical parameter of described wireless chip network-driven comprises 802.11 frame number of retransmissions are per second, packet number of dropped packets is per second, receive signal strength signal intensity instruction and transmission buffering area surplus.
As a kind of embodiment, described real-time Transmission processing module also comprises judging unit and the first adjustment unit, wherein:
Described judging unit, for judging the predetermined threshold value grade that described internal transmission statistical parameter, described total data buffer use the free memory of size and described current system satisfied in threshold value table;
Described first adjustment unit, for parameter and the display resolution of video encoder according to the described predetermined threshold value level adjustment met.
As a kind of embodiment, also comprise the 4th input unit and the second adjustment unit, wherein:
Described 4th input unit, the differentiation video stream data exported for detecting described video encoder is in real time the flag bit of P frame or B frame;
Described second adjustment unit is drive sweep for arranging the scan mode of wireless chip network-driven according to described flag bit, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions.
Beneficial effect of the present invention comprises:
Mobile device video streaming control method of the present invention and system, the link of feedback is added at the links of transmission network, by detecting the networking detected parameters of transmission network in real time, again process is adjusted to video and network transmission parameter according to network detected parameters, achieve and control with the information interaction of transmission network.Network detected parameters of the present invention comprises the internal transmission statistical parameter of wireless chip network-driven, total data buffer uses size, the free memory of current system, according to its predetermined threshold value grade met in threshold value table of weight ratio calculation of these network detected parameters, according to predetermined threshold value level adjustment frame per second, code check and display resolution, make it when not affecting or reduce image quality a little, ensure the low delay of video playback and fluency and can quick-recovery soon, the differentiation video stream data detecting video encoder output is the flag bit of B frame or P frame, feed back to wireless chip network-driven, wireless chip network-driven identification B frame and P frame, the transmission of key frame of video can be ensured, thus ensure reliable image quality, good Consumer's Experience is provided.
Accompanying drawing explanation
Fig. 1 is the flow chart of an embodiment of mobile device video streaming control method of the present invention;
Fig. 2 is the frame structure schematic diagram of an embodiment of the transmission network of mobile device video streaming control method of the present invention;
Fig. 3 is the structural representation of an embodiment of mobile device video streaming control system of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, mobile device video streaming control method of the present invention and system are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Shown in Fig. 1, Fig. 2, the embodiment of the present invention provides a kind of mobile device video streaming control method, comprises the following steps:
S100, in video streaming process, detects the network detected parameters of transmission network in real time.
S200, adjusts process to video and network transmission parameter again according to network detected parameters.Wherein, video and the adjustment process of network transmission parameter comprise the parameter adjustment of the parameter adjustment relevant to Video coding end and wireless chip network-driven.
Traditional mobile device video stream transmission method, the data source of video image and system display buffer (buffer), video encoder is exported to after passing ratio convergent-divergent, video encoder is fixed the output of code check and frame per second according to the code check pre-set before and frame per second, then Streaming Media encapsulation packing (being such as packaged as mpeg4ts form) is carried out, output to data buffer storage chained list etc. to be output to UDPsocketbuffer (User Datagram Protocol socket buffer memory) after Streaming Media encapsulation, send out finally by wireless chip network-driven.Traditional RTSP (RealTimeStreamingProtocol, real-time streaming protocol)/RTP (RealTimeTransportProtocol, RTP) control with transmission bandwidth and data packetloss Retransmission control, but because the realization in protocol level exists larger time delay, the re-transmission of lost package is waited within the regular hour, time-out then abandons, and needs to use the preservation of a certain amount of Installed System Memory to send still unacknowledged video stream data, cannot ensure real-time.Also there is following shortcoming in conventional art: WIFI too much and initiatively can abandon data due to number of retransmissions, no matter and whether transmission data are important, or the time delay due to transmission causes local buffer data grows many and initiatively abandons buffer data, in data transmission link, initiatively abandon video data can cause serious flower screen and a card problem, and irrecoverable.
Object of the present invention overcomes the problems referred to above exactly, effectively ensures the quality of video playback while low delay.The embodiment of the present invention detects the networking detected parameters of transmission network in real time, realize controlling with the information interaction of transmission network, the internal memory service condition of having combined closely in the data link of wireless chip network-driven and transmission network, networking detected parameters according to detecting adjusts process to the video of transmission network and network transmission parameter, as adjusted the frame per second of video encoder, code check, the display resolution of resize ratio convergent-divergent, make transmission network when not affecting or reduce image quality a little, ensure the low delay of video playback and fluency and can quick-recovery soon, reach and reduce the object of network traffics and the quality assurance to key frame of video, thus provide good Consumer's Experience for user.
As a kind of embodiment, detect the network detected parameters of transmission network in real time, comprise the steps:
The internal transmission statistical parameter of real-time detection wireless chip network-driven, as the first input.
Data buffer total after the encapsulation of real-time detection current Streaming Media uses size, as the second input.
The free memory of real-time detection current system, as the 3rd input.
The parameter adjustment of decision-making video encoder and the predetermined threshold value grade of display resolution adjustment is deposited, as the 5th input in threshold value table.
The weight ratio of weight ratio > the 3rd input of weight ratio > second input of the first input.
Obtain the internal transmission statistical parameter of wireless chip network-driven, data buffer total after obtaining Streaming Media encapsulation uses size, obtains the free memory of current system, and according to their its predetermined threshold value grade met in threshold value table of weight ratio calculation.Wherein, the weight ratio that can arrange the internal transmission statistical parameter of wireless chip network-driven is 70%, and total data buffer uses the weight ratio of size to be 20%, and the weight ratio of the free memory of current system is 10%.Certainly, in other embodiments, also can make the appropriate adjustments, ratio shared by each parameter is adjusted to other numerical value.Predetermined threshold value grade defines according to concrete product specification.
As a kind of embodiment, the internal transmission statistical parameter of wireless chip network-driven comprises 802.11 frame number of retransmissions are per second, packet number of dropped packets is per second, receive signal strength signal intensity instruction and transmission buffering area surplus.
The number of times that in 802.11 frame number of retransmissions expression per second 1s, 802.11 frames retransmit, its value is less, and represent that network environment is better, it can estimate the busy extent of current radio transmission network, directly can obtain from wireless chip network-driven.Drive the number of times of packet loss in packet number of dropped packets expression per second 1s, its value is less, represents that network environment is better, and it can be weighed and retransmit failed number of times, estimates the quality of current radio transmission network.Signal strength signal intensity instruction (the RSSI received, ReceivedSignalStrengthIndication) intensity of current transmission data-signal is represented, general home environment or meeting room environmental field are [-100dBm,-35dBm], its scope is relevant with reception environment with wireless receiving antenna, affect the quality of wireless-transmission network, it directly can obtain from wireless chip network-driven.Send buffering area surplus and represent the speed of transmission and the data volume of upper layer transport, data area is expressed as percentage, is generally [0.1,1], also directly can obtain from wireless chip network-driven.Their weight size is: the signal strength signal intensity instruction > that 802.11 frame number of retransmissions > per second packet number of dropped packets > per second receives sends buffering area surplus.Judge the quality of wireless-transmission network according to their weight size, and obtain the parameter that can represent wireless chip network-driven.
As a kind of embodiment, carry out the parameter adjustment relevant to Video coding end according to network detected parameters, comprise the steps:
Judge the predetermined threshold value grade that described first input, the second input and the 3rd input meet in the threshold value table of the 5th input.
According to parameter and the display resolution of the predetermined threshold value level adjustment video encoder met.
What the first input represented is the internal transmission statistical parameter of wireless chip network-driven, and it effectively can weigh the quality of current radio transmission network; What the second input represented is that after Streaming Media encapsulation, total data buffer uses size; What the 3rd input represented is the free memory of current system; The parameter value of transmission network situation is shown according to the first input, the second input and the 3rd weight ratio computational chart inputted, and compare with the preset threshold range deposited in threshold value table, judge its predetermined threshold value grade met in threshold value table, select to affect the minimum strategy of Consumer's Experience, as reduced frame per second, adjustment code check, and dynamic conditioning display resolution etc.Wherein, the parameter of video encoder comprises frame per second and code check.The adjustment priority of frame per second, code check and display resolution is: frame per second > code check > display resolution.
The detailed process of carrying out the parameter adjustment relevant to Video coding end according to network detected parameters is described below in conjunction with a specific embodiment:
Suppose that optional frame per second comprises 60fps, 30fps and 24fps, optional code check comprises 5Mbps, 3Mbps and 1Mbps, and the display resolution of support comprises 1080p, 720p and 480p, and its predetermined threshold value grade can be divided at most 27 grades.The division of its grade also defines according to concrete product specification, as maximumly in some products-hardware 60fps/5Mbps/1080p can only be supported, the predetermined threshold value grade that this product is corresponding can be divided into 9, wherein: output corresponding to the first predetermined threshold value grade is 60fps/5Mbps/1080p, output corresponding to the second predetermined threshold value grade is 30fps/5Mbps/1080p, output corresponding to the 3rd predetermined threshold value grade is 24fps/5Mbps/1080p, output corresponding to the 4th predetermined threshold value grade is 60fps/3Mbps/1080p, output corresponding to the 5th predetermined threshold value grade is 30fps/3Mbps/1080p, output corresponding to the 6th predetermined threshold value grade is 24fps/3Mbps/1080p, output corresponding to the 7th predetermined threshold value grade is 60fps/1Mbps/1080p, output corresponding to the 8th predetermined threshold value grade is 30fps/1Mbps/1080p, output corresponding to the 9th predetermined threshold value grade is 24fps/1Mbps/1080p.The scope of the predetermined threshold value deposited in given threshold table is (0,1], the scope of the division first predetermined threshold value grade that then may correspond to is (0,0.1], the scope of the second predetermined threshold value grade be (0.1,0.2], the like, the scope of the 9th predetermined threshold value grade be (0.9,1].
In one embodiment, the value of the first input is 30, and weight ratio is 70%, the value of the second input is 20, weight ratio is the value of the 20%, three input is 10, and weight ratio is 10%, calculate the parameter value of the expression transmission network situation that three inputs obtain, be 0.26 after normalization, meet the 3rd predetermined threshold value grade, output corresponding to the 3rd predetermined threshold value grade is 24fps/5Mbps/1080p, and then frame per second, code check and the display resolution of adjustment video encoder.
As a kind of embodiment, also comprise the steps:
The differentiation video stream data that real-time detection video encoder exports is the flag bit of P frame or B frame, as the 4th input.
Carry out the parameter adjustment of wireless chip network-driven according to network detected parameters, comprise the steps:
The scan mode arranging wireless chip network-driven according to flag bit is drive sweep, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions.
The flag bit that real-time detection is P frame or B frame with the differentiation video stream data obtaining video encoder and export, after obtaining flag bit, feed back to wireless chip network-driven, wireless chip network-driven is P frame according to which kind of video stream data of flag bit identification, which kind of video stream data is B frame, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions, ensures the transmission quality of key frame, thus ensure that the quality of video.When transmitting live video stream, the scan mode arranging wireless chip network-driven is drive sweep, and the drive sweep time is 3 times of sweep time at ordinary times, reduces the resource consumption scanning and bring.
Based on same inventive concept, present invention also offers a kind of mobile device video streaming control system, the principle of dealing with problems due to this system is similar to aforementioned a kind of mobile device video streaming control method, therefore the enforcement of this system see the enforcement of preceding method, can repeat part and repeats no more.
The mobile device video streaming control system that the embodiment of the present invention provides, shown in Figure 3, comprise real-time Transmission processing module 100, for in video streaming process, the network detected parameters of real-time detection transmission network, adjusts process to video and Internet Transmission transformation parameter again according to network detected parameters; Wherein, video and the adjustment process of network transmission parameter comprise the parameter adjustment of the parameter adjustment relevant to Video coding end and wireless chip network-driven.
Mobile device video streaming control system of the present invention, the link adding feedback at the links of transmission network carries out Real-time Decision adjustment, provides good Consumer's Experience, reduces time delay, and ensure that reliable image quality.
As a kind of embodiment, described real-time Transmission processing module 100 comprises the first input unit 101, second input unit the 102, three input unit 103 and the 5th input unit 105, wherein:
First input unit 101, for detecting the internal transmission statistical parameter that wireless chip networking drives in real time.
Second input unit 102, uses size for detecting the rear total data buffer of current Streaming Media encapsulation in real time.
3rd input unit 103, for detecting the free memory of current system in real time.
5th input unit 105, the predetermined threshold value grade that parameter adjustment and display resolution for depositing decision-making video encoder adjust.
The weight ratio of weight ratio > the 3rd input unit of weight ratio > second input unit of the first input unit.
As a kind of embodiment, the internal transmission statistical parameter of wireless chip network-driven comprises 802.11 frame number of retransmissions are per second, packet number of dropped packets is per second, receive signal strength signal intensity instruction and transmission buffering area surplus.
As a kind of embodiment, real-time Transmission processing module 100 also comprises judging unit 110 and the first adjustment unit 120, wherein:
Judging unit 110, for judging the predetermined threshold value grade that internal transmission statistical parameter, total data buffer use the free memory of size and current system satisfied in threshold value table.
First adjustment unit 120, for according to the parameter of predetermined threshold value level adjustment video encoder met and display resolution.
As a kind of embodiment, also comprise the 4th input unit 104 and the second adjustment unit 130, wherein:
4th input unit 104, the differentiation video stream data exported for detecting video encoder is in real time the flag bit of P frame or B frame.
Second adjustment unit 130 is drive sweep for arranging the scan mode of wireless chip network-driven according to flag bit, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a mobile device video streaming control method, is characterized in that, comprises the following steps:
In video streaming process, detect the network detected parameters of transmission network in real time;
Again process is adjusted to video and network transmission parameter according to described network detected parameters;
Described video comprises the parameter adjustment of the parameter adjustment relevant to Video coding end and wireless chip network-driven with the adjustment process of network transmission parameter.
2. mobile device video streaming control method according to claim 1, is characterized in that, the network detected parameters of described real-time detection transmission network, comprises the steps:
The internal transmission statistical parameter of real-time detection wireless chip network-driven, as the first input;
Data buffer total after the encapsulation of real-time detection current Streaming Media uses size, as the second input;
The free memory of real-time detection current system, as the 3rd input;
The parameter adjustment of decision-making video encoder and the predetermined threshold value grade of display resolution adjustment is deposited, as the 5th input in threshold value table;
The weight ratio of weight ratio > the 3rd input of weight ratio > second input of described first input.
3. mobile device video streaming control method according to claim 2, it is characterized in that, the internal transmission statistical parameter of described wireless chip network-driven comprises 802.11 frame number of retransmissions are per second, packet number of dropped packets is per second, receive signal strength signal intensity instruction and transmission buffering area surplus.
4. mobile device video streaming control method according to claim 2, is characterized in that, carries out the parameter adjustment relevant to Video coding end, comprise the steps: according to described network detected parameters
Judge the predetermined threshold value grade that described first input, the second input and the 3rd input meet in the threshold value table of the 5th input;
The parameter of video encoder and display resolution according to the described predetermined threshold value level adjustment met.
5. mobile device video streaming control method according to claim 4, is characterized in that, also comprise the steps:
The differentiation video stream data that the described video encoder of real-time detection exports is the flag bit of P frame or B frame, as the 4th input;
Carry out the parameter adjustment of wireless chip network-driven according to described network detected parameters, comprise the steps:
The scan mode arranging wireless chip network-driven according to described flag bit is drive sweep, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions.
6. a mobile device video streaming control system, it is characterized in that, comprise real-time Transmission processing module, in video streaming process, the network detected parameters of real-time detection transmission network, adjusts process to video and network transmission parameter again according to described network detected parameters;
Described video comprises the parameter adjustment of the parameter adjustment relevant to Video coding end and wireless chip network-driven with the adjustment process of network transmission parameter.
7. mobile device video streaming control system according to claim 6, is characterized in that, described real-time Transmission processing module comprises the first input unit, the second input unit, the 3rd input unit and the 5th input unit, wherein:
Described first input unit, for detecting the internal transmission statistical parameter that wireless chip networking drives in real time;
Described second input unit, uses size for detecting the rear total data buffer of current Streaming Media encapsulation in real time;
Described 3rd input unit, for detecting the free memory of current system in real time;
Described 5th input unit, the predetermined threshold value grade that parameter adjustment and display resolution for depositing decision-making video encoder adjust;
The weight ratio of weight ratio > the 3rd input unit of weight ratio > second input unit of described first input unit.
8. mobile device video streaming control system according to claim 7, it is characterized in that, the internal transmission statistical parameter of described wireless chip network-driven comprises 802.11 frame number of retransmissions are per second, packet number of dropped packets is per second, receive signal strength signal intensity instruction and transmission buffering area surplus.
9. mobile device video streaming control system according to claim 7, is characterized in that, described real-time Transmission processing module also comprises judging unit and the first adjustment unit, wherein:
Described judging unit, for judging the predetermined threshold value grade that described internal transmission statistical parameter, described total data buffer use the free memory of size and described current system satisfied in threshold value table;
Described first adjustment unit, for parameter and the display resolution of video encoder according to the described predetermined threshold value level adjustment met.
10. mobile device video streaming control system according to claim 9, is characterized in that, also comprises the 4th input unit and the second adjustment unit, wherein:
Described 4th input unit, the differentiation video stream data exported for detecting described video encoder is in real time the flag bit of P frame or B frame;
Described second adjustment unit is drive sweep for arranging the scan mode of wireless chip network-driven according to described flag bit, and the number of retransmissions arranging P frame is 3 times of B frame number of retransmissions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410263758.4A CN105263066A (en) | 2014-06-13 | 2014-06-13 | Mobile equipment video stream transmission control method and system |
| PCT/CN2015/079029 WO2015188678A1 (en) | 2014-06-13 | 2015-05-15 | Transmission control method and system for video stream of mobile device |
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| CN201410263758.4A CN105263066A (en) | 2014-06-13 | 2014-06-13 | Mobile equipment video stream transmission control method and system |
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