CN103118241B - Based on the mobile video monitor streaming media self-adapting regulation method of 3G network - Google Patents

Abstract

The invention discloses a kind of mobile video monitor streaming media Adaptive adjusting algorithm based on 3G network, it comprises the following steps: a) arrange network monitoring parameter; B) 3G network state is obtained; C) whether verification msg is key frame; D) the non-key frame data in step c are abandoned; E) network state is recorded; F) judge whether network state reaches adjustment coding parameter condition; G) coding parameter is adjusted; H) network state record is reset.The invention has the beneficial effects as follows and the speed of 3G network can be allowed to fluctuate in a big way, and can not cause network congestion, there is the phenomenon that Hua Pinghe blocks in user monitoring picture; Judged, come the coding parameter of dynamic conditioning equipment by statistics, make equipment make a reaction in time to current network capabilities, alleviate the load of network, reach and improve current network conditions, eliminate congested effect.

Description

Based on the mobile video monitor streaming media self-adapting regulation method of 3G network

[technical field]

The present invention relates to a kind of mobile video monitor streaming media Adaptive adjusting algorithm based on 3G network.

[background technology]

Along with rapid rise and the extensive use of all kinds of internet, day by day increase from the business of network data services upload and download data message.Mobile monitoring device adopts 3G network to transmit data usually, and popularizing along with mobile monitor product, the bandwidth bottleneck problem of 3G network highlights day by day, terminal equipment streaming media belongs to uploads action, although 3G network speed of download is day by day soaring, but owing to uploading the asymmetry of download, uploading speed supports the real time streaming of resolution CIF, code check 256Kps reluctantly.Video monitoring to the real-time of network and stability requirement very high, and 3G network is easily subject to external environment influence, produces fluctuation, affects real time flow medium transfer of data.

[summary of the invention]

The object of the invention is to the deficiency effectively overcoming above-mentioned technology, a kind of mobile video monitor streaming media Adaptive adjusting algorithm based on 3G network is provided, the present invention is according to 3G network real-time status, the real-time coding mode of mobile monitoring device is adjusted, ensures the smoothness of the unimpeded of network and user monitoring picture.

Technical scheme of the present invention is achieved in that its improvements are, it comprises the following steps:

A) network monitoring parameter is set, utilizing socket option SO_SNDBUF to arrange socket transmission buffer size is buf, utilizing socket option SO_SNDLOWAT to arrange socket transmission low tide is buf/2, arranges network good level value GOOD_CONDITION and the severe grade point BAD_CONDITION of network in addition;

B) obtain 3G network state, whether poll socket can be write can judge 3G network state, if socket can not be write, then represent that the consumption rate of socket buffer data does not catch up with speed of production, i.e. network state blocking, then enter step c; If socket can be write, represent that network state is good, then enter step e; The frame per second of normal stream media is 25 frames, and namely average 40ms sends a secondary data, considers the time that sending action consumes, and arranging time-out time long is 5-20ms, avoids unnecessary circulation, saves cpu resource;

C) whether verification msg is key frame, if these data are key frame, then enters step e, if this data non-key frame, then directly enters steps d;

D) the non-key frame data in step c are abandoned;

E) record network state, if socket can be write, namely network state is good, then network is well counted nGood and add 1, network congestion is counted nBad and sets to 0; If socket can not be write, namely network state is blocked up, then network is well counted nGood and set to 0, network congestion is counted nBad and adds 1;

F) judge whether network state reaches adjustment coding parameter condition:

Just network well counts nGood and network good level value GOOD_CONDITION contrasts, if nGood is >=GOOD_CONDITION, then improves coding parameter grade;

Network congestion is counted nBad and the severe grade point BAD_CONDITION of network contrasts, if nBad is >=BAD_CONDITION, then reduce coding parameter grade;

G) adjust coding parameter, when network environment is good, adopts and recover slowly, improve coding parameter grade, each lifting amount is that code check grade adds 1; When network environment is congested, significantly need reduce code check, reduce coding parameter grade, therefore each reduction amount is that code check grade reduces by half;

H) reset network state record, network is well counted nGood and reset, network congestion is counted nBad and reset, repeat step b to step h.

In described step b, the time-out time of setting is long is 10ms.

In described step f, code check parameter level is always divided into 8 kinds, and code check and the frame per second of its correspondence meet following table:

Grade	Frame per second (fps)	Code check (kbps)
			1	3	32
2	5	64
			3	7	96
4	9	128
			5	11	160
6	13	192
			7	15	222
8	17	256

In described step g, adjustment coding parameter is temporarily stored in internal memory, and do not write direct equipment flash.Beneficial effect of the present invention is: one, the present invention can allow the speed of 3G network to fluctuate in a big way, and can not cause network congestion, and the phenomenon that Hua Pinghe blocks appears in user monitoring picture; When network environment is deteriorated, reduce coding parameter grade, ensure monitor video smoothness, when network environment is recovered, improve coding parameter grade, ensure image sharpness, even under the network environment of very severe, use minimum coded system to ensure that user monitoring picture can not block; Two, the present invention judges, comes the coding parameter of dynamic conditioning equipment by statistics, equipment is made to make a reaction in time to current network capabilities, alleviate the load of network, then select whether abandon these data according to the importance of data, improve current network conditions to reach, eliminate congested effect.

[accompanying drawing explanation]

Fig. 1 is flow chart of the present invention.

[embodiment]

Below in conjunction with drawings and Examples, the invention will be further described.

With reference to shown in Fig. 1, the mobile video monitor streaming media Adaptive adjusting algorithm based on 3G network that the present invention discloses, it comprises the following steps:

A) arrange network monitoring parameter, utilizing socket option SO_SNDBUF to arrange socket transmission buffer size is buf, and utilizing socket option SO_SNDLOWAT to arrange socket transmission low tide is buf/2; Buffering area is the bigger the better, and small size network fluctuation can be offset in large buffering area, arranges network good level value GOOD_CONDITION and the severe grade point BAD_CONDITION of network in addition;

B) obtain 3G network state, whether poll socket can be write can judge 3G network state, if socket can not be write, then represent that the consumption rate of socket buffer data does not catch up with speed of production, i.e. network state blocking, then enter step c; If socket can be write, represent that network state is good, then enter step e; The frame per second of normal stream media is 25 frames, and namely average 40ms sends a secondary data, considers the time that sending action consumes, and arranging time-out time long is 10ms, avoids unnecessary circulation, saves cpu resource;

C) whether verification msg is key frame, if these data are key frame, then enters step e, if this data non-key frame, then directly enters steps d;

D) the non-key frame data in step c are abandoned; Key frame in H264 can decode separately a pictures, and non-key frame need to rely on it before key frame decode, so key frame can not abandon, non-key frame can abandon;

E) record network state, if socket can be write, namely network state is good, then network is well counted nGood and add 1, network congestion is counted nBad and sets to 0; If socket can not be write, namely network state is blocked up, then network is well counted nGood and set to 0, network congestion is counted nBad and adds 1;

F) judge whether network state reaches adjustment coding parameter condition:

Just network well counts nGood and network good level value GOOD_CONDITION contrasts, if nGood is >=GOOD_CONDITION, then improves coding parameter grade;

Network congestion is counted nBad and the severe grade point BAD_CONDITION of network contrasts, if nBad is >=BAD_CONDITION, then reduce coding parameter grade;

G) adjust coding parameter, when network environment is good, adopts and recover slowly, improve coding parameter grade, each lifting amount is that code check grade adds 1; When network environment is congested, significantly need reduce code check, reduce coding parameter grade, therefore each reduction amount is that code check grade reduces by half; Code check parameter level is always divided into 8 kinds, and frame per second and the code check of often kind of grade see the following form:

Grade	Frame per second (fps)	Code check (kbps)
			1	3	32
2	5	64
			3	7	96
4	9	128
			5	11	160
6	13	192
			7	15	222
8	17	256

Further, because the adjustment encoder bit rate action invocation in this algorithm is quite frequent, the equipment flash so adjustment coding parameter should not write direct, is only temporarily stored in internal memory;

H) reset network state record, network is well counted nGood and reset, network congestion is counted nBad and reset, repeat step b to step h.

Mobile monitoring device, when adopting 3G network transmission data, if be subject to external action, can produce fluctuation, thus have impact on the transmission of real time flow medium data, by above-mentioned steps, when network congestion and network environment are deteriorated, then reduce code check parameter level, as shown above, code check grade reduces, so frame per second and code check then corresponding reduction, thus ensure the fluency of monitor video, when network well namely recover by network environment, then improve code check parameter level, thus ensure the definition of picture.Time under the network environment of very severe, use minimum coded system to ensure that user monitoring picture can not block.

Described above is only preferred embodiment of the present invention, and above-mentioned specific embodiment is not limitation of the present invention.In technological thought category of the present invention, can occur various distortion and amendment, all those of ordinary skill in the art, according to describing retouching, the amendment made above or equivalent replacing, all belong to the scope that the present invention protects.

Claims (3)

1., based on a mobile video monitor streaming media self-adapting regulation method for 3G network, it is characterized in that: it comprises the following steps:

A) network monitoring parameter is set, utilizing socket option SO_SNDBUF to arrange socket transmission buffer size is buf, utilizing socket option SO_SNDLOWAT to arrange socket transmission low tide is buf/2, arranges network good level value GOOD_CONDITION and the severe grade point BAD_CONDITION of network in addition;

B) obtain 3G network state, whether poll socket can be write can judge 3G network state, if socket can not be write, then represent that the consumption rate of socket buffer data does not catch up with speed of production, i.e. network state blocking, then enter step c; If socket can be write, represent that network state is good, then enter step e; The frame per second of normal stream media is 25 frames, and namely average 40ms sends a secondary data, considers the time that sending action consumes, and arranging time-out time long is 5-20ms, avoids unnecessary circulation, saves cpu resource;

C) whether verification msg is key frame, if these data are key frame, then enters step e, if this data non-key frame, then directly enters steps d;

D) the non-key frame data in step c are abandoned;

E) record network state, if socket can be write, namely network state is good, then network is well counted nGood and add 1, network congestion is counted nBad and sets to 0; If socket can not be write, namely network state is blocked up, then network is well counted nGood and set to 0, network congestion is counted nBad and adds 1;

F) judge whether network state reaches adjustment coding parameter condition:

Network is well counted nGood and network good level value GOOD_CONDITION contrasts, if nGood is >=GOOD_CONDITION, then improve coding parameter grade;

Network congestion is counted nBad and the severe grade point BAD_CONDITION of network contrasts, if nBad is >=BAD_CONDITION, then reduce coding parameter grade;

G) adjust coding parameter, when network environment is good, adopts and recover slowly, improve coding parameter grade, each lifting amount is that code check grade adds 1; When network environment is congested, significantly need reduce code check, reduce coding parameter grade, therefore each reduction amount is that code check grade reduces by half;

H) reset network state record, network is well counted nGood and reset, network congestion is counted nBad and reset, repeat step b to step h;

In described step g, adjustment coding parameter is temporarily stored in internal memory, and do not write direct equipment flash.

2. a kind of mobile video monitor streaming media self-adapting regulation method based on 3G network according to claim 1, is characterized in that: in described step b, and the time-out time of setting is long is 10ms.

3. a kind of mobile video monitor streaming media self-adapting regulation method based on 3G network according to claim 1, it is characterized in that: in described step g, code check parameter level is always divided into 8 kinds, and code check and the frame per second of its correspondence meet following table:

Grade Frame per second (fps) Code check (kbps) 1 3 32 2 5 64 3 7 96 4 9 128 5 11 160 6 13 192 7 15 222 8 17 256