CN105979304A - Video pushing method and video pushing device - Google Patents

Abstract

The invention discloses a video pushing method and a video pushing device, which are used for a server. The video pushing method is characterized in that network bandwidth of a client used for playing a target on-line video is acquired in a real-time manner; whether the network bandwidth satisfies a requirement of playing the target on-line video is determined; when the answer is no, the interested area and the uninterested area of every frame of the target on-line video are determined according to a preset determining rule; the proportions of the network bandwidth occupied by the interested areas and the uninterested areas are determined according to the network bandwidth and the frame rate of the target on-line video; according to the proportions, first quantization parameters corresponding to the interested areas and second quantization parameters corresponding to the uninterested areas are determined; according to the first quantization parameters and the second quantization parameters, the interested areas and the uninterested areas are respectively coded; the coded frames are pushed to the client, and then the client is used to play the target on-line video. By adopting the video pushing method and the video pushing device, a part of the on-line video having the high regional definition is played.

Description

A kind of video pushing method and device

Technical field

The present invention relates to technical field of video processing, particularly to a kind of video pushing method and device.

Background technology

Along with the development of the Internet, viewing Online Video has become as a part for people's life.Under normal circumstances, same Online Video has multiple definition.The definition of Online Video is the highest, more can allow users to obtain more preferable viewing and experience.

But, play the Online Video that definition is higher, higher to the network bandwidth requirement of client.If client The network bandwidth is not enough, during playing the Online Video that definition is higher, it may appear that video Caton phenomenon.Regard to reduce Frequently the appearance of Caton phenomenon, needs to reduce the definition of the Online Video play, it is generally the case that can reduce regarding online of broadcasting The definition of each frame of frequency, and then cause the Online Video entirety play the most unintelligible.

Summary of the invention

The purpose of the embodiment of the present invention is to provide a kind of video pushing method and device, for solving regarding online of broadcasting Frequently the most unsharp problem of entirety.Technical scheme is as follows:

For arriving above-mentioned purpose, the embodiment of the invention discloses a kind of video pushing method, be applied to server, described clothes Business device is connected with client communication, and method includes:

Obtain described client in real time for playing the network bandwidth of target Online Video；

Judge whether the described network bandwidth meets the requirement playing described target Online Video；

If it does not, determine rule according to presetting, determine the area-of-interest of each frame of video in described target Online Video And regions of non-interest, wherein, described area-of-interest is the region that need not reduce video definition, described non-interested Region is the region needing to reduce video definition；

According to the described network bandwidth and the frame per second of described target Online Video, determine that described area-of-interest and non-sense are emerging Interest region accounts for the ratio of described networking bandwidth respectively；

According to described ratio, determine the first quantization parameter and regions of non-interest difference that described area-of-interest is corresponding The second corresponding quantization parameter；

According to described first quantization parameter and described second quantization parameter, respectively to described area-of-interest and described non- Area-of-interest encodes；

Frame of video after coding is pushed to described client, so that target Online Video described in described client terminal playing.

It is also preferred that the left described basis is preset determines rule, determine the interested of each frame of video in described target Online Video Region and regions of non-interest, including:

Determine rule according to presetting, determine each frame of video do not play in video segment of described target Online Video Area-of-interest and regions of non-interest.

It is also preferred that the left described basis is preset determines rule, determine the interested of each frame of video in described target Online Video Region and regions of non-interest, including:

In the described target Online Video that face recognition technology will be utilized to identify, the face in each frame of video, is defined as Area-of-interest, will be defined as non-sense except the region that described region of interest is overseas in each frame of video in described target Online Video Interest region.

It is also preferred that the left described according to the described network bandwidth with the frame per second of described target Online Video, determine described region of interest Territory and regions of non-interest account for the ratio of described networking bandwidth respectively, including:

According to overall video quality V_qWith area-of-interest shared by the relation of overall bandwidth ratio p:

$V_q=w_1(1+(v_3-\frac{v_3}{1+{\left(\frac{(1-p){\mathrm{Br}}_v}{v_4}\right)}^{v_5}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2\left(1-p\right){\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7(1-p\left){\mathrm{Br}}_v\right)}^2}\left)\right)+w_2(1+({v_3}^{\′}-\frac{{v_3}^{\′}}{1+{\left(\frac{{\mathrm{pBr}}_v}{{v_4}^{\′}}\right)}^{{v_5}^{\′}}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln ({v_1}^{\′}+{v_2}^{\′}{\mathrm{pBr}}_v\left)\right)}^2}{2{({v_6}^{\′}+{v_7}^{\′}{\mathrm{pBr}}_v)}^2}\left)\right)$

By overall video quality V_qP corresponding when being in optimum is defined as described area-of-interest and accounts for described networking bandwidth Ratio；1-p is defined as described regions of non-interest and accounts for the ratio of described networking bandwidth；

Wherein, 0.5≤p < 1, v₁、v₂、v₃、v₄、v₅、v₆、v₇、v₁'、v₂'、v₃'、v₄'、v₅'、v₆'、v₇' be and coding staff Formula, video frame rate, constant coefficient that Video Key frame period is relevant with video resolution, Fr_vFrame for described target Online Video Rate, Br_vFor the described network bandwidth, w₁For the weight coefficient of regions of non-interest, w₂Weight coefficient for area-of-interest.

It is also preferred that the left described according to described ratio, determine the first quantization parameter and non-sense that described area-of-interest is corresponding The second quantization parameter that interest region is the most corresponding, including:

Account for the ratio of described networking bandwidth according to described area-of-interest and described regions of non-interest, calculate respectively Described area-of-interest and the bandwidth of described regions of non-interest；

According to bandwidth and the relation of quantization parameter, determine described first quantization parameter and described second quantization parameter, its In, bandwidth with the relation of quantization parameter is:

Br_v=aQP^-1+bQP^-2

Wherein, Br_vFor bandwidth, a with b is the model parameter relevant to frame type, and QP is quantization parameter.

For reaching above-mentioned purpose, the embodiment of the invention also discloses a kind of video push device, be applied to server, described Server is connected with client communication, and described device includes: bandwidth detection, bandwidth judge module, region divide module, band Wide ratio-dependent module, quantization parameter determine module, coding module, pushing module, wherein,

Described bandwidth detection, obtains described client for playing the Netowrk tape of target Online Video in real time Wide；

Described bandwidth judge module, plays wanting of described target Online Video for judging whether the described network bandwidth meets Ask；

Described region divides module, for when the judged result of bandwidth judge module is no, determines rule according to presetting, Determine area-of-interest and the regions of non-interest of each frame of video in described target Online Video, wherein, described interested Region is the region that need not reduce video definition, and described regions of non-interest is to need to reduce the region of video definition；

Described bandwidth ratio-dependent module, is used for according to the described network bandwidth and the frame per second of described target Online Video, really Fixed described area-of-interest and regions of non-interest account for the ratio of described networking bandwidth respectively；

Described quantization parameter determines module, for according to described ratio, determines the first amount that described area-of-interest is corresponding Change parameter and the second quantization parameter of regions of non-interest correspondence respectively；

Described coding module, for according to described first quantization parameter and described second quantization parameter, respectively to described Area-of-interest and described regions of non-interest encode；

Described pushing module, for the frame of video after coding is pushed to described client, so that described client terminal playing Described target Online Video.

It is also preferred that the left described region divides module, specifically for:

Determine rule according to presetting, determine each frame of video do not play in video segment of described target Online Video Area-of-interest and regions of non-interest.

It is also preferred that the left described region divides module, specifically for:

In the described target Online Video that face recognition technology will be utilized to identify, the face in each frame of video, is defined as Area-of-interest, will be defined as non-sense except the region that described region of interest is overseas in each frame of video in described target Online Video Interest region.

It is also preferred that the left described bandwidth ratio-dependent module, specifically for:

According to overall video quality V_qWith area-of-interest shared by the relation of overall bandwidth ratio p:

$V_q=w_1(1+(v_3-\frac{v_3}{1+{\left(\frac{(1-p){\mathrm{Br}}_v}{v_4}\right)}^{v_5}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2\left(1-p\right){\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7(1-p\left){\mathrm{Br}}_v\right)}^2}\left)\right)+w_2(1+({v_3}^{\&prime;}-\frac{{v_3}^{\&prime;}}{1+{\left(\frac{{\mathrm{pBr}}_v}{{v_4}^{\&prime;}}\right)}^{{v_5}^{\&prime;}}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln ({v_1}^{\&prime;}+{v_2}^{\&prime;}{\mathrm{pBr}}_v\left)\right)}^2}{2{({v_6}^{\&prime;}+{v_7}^{\&prime;}{\mathrm{pBr}}_v)}^2}\left)\right)$

By overall video quality V_qP corresponding when being in optimum is defined as described area-of-interest and accounts for described networking bandwidth Ratio；1-p is defined as described regions of non-interest and accounts for the ratio of described networking bandwidth；

Wherein, 0.5≤p < 1, v₁、v₂、v₃、v₄、v₅、v₆、v₇、v₁'、v₂'、v₃'、v₄'、v₅'、v₆'、v₇' be and coding staff Formula, video frame rate, constant coefficient that Video Key frame period is relevant with video resolution, Fr_vFrame for described target Online Video Rate, Br_vFor the described network bandwidth, w₁For the weight coefficient of regions of non-interest, w₂Weight coefficient for area-of-interest.

It is also preferred that the left described quantization parameter determines module, specifically for:

Account for the ratio of described networking bandwidth according to described area-of-interest and described regions of non-interest, calculate respectively Described area-of-interest and the bandwidth of described regions of non-interest；

According to bandwidth and the relation of quantization parameter, determine described first quantization parameter and described second quantization parameter, its In, bandwidth with the relation of quantization parameter is:

Br_v=aQP^-1+bQP^-2

Wherein, Br_vFor bandwidth, a with b is the model parameter relevant to frame type, and QP is quantization parameter.

As seen from the above technical solutions, the embodiment of the invention discloses a kind of video pushing method and device, be applied to Server, described server is connected with client communication, and method includes: it is online that the described client of real-time acquisition is used for playing target The network bandwidth of video；Judge whether the described network bandwidth meets the requirement playing described target Online Video；If it does not, according to Preset and determine rule, determine area-of-interest and the regions of non-interest of each frame of video in described target Online Video, its In, described area-of-interest is the region that need not reduce video definition, and described regions of non-interest reduces video for needs The region of definition；According to the described network bandwidth and the frame per second of described target Online Video, determine described area-of-interest and Regions of non-interest accounts for the ratio of described networking bandwidth respectively；According to described ratio, determine that described area-of-interest is corresponding Second quantization parameter of one quantization parameter and regions of non-interest correspondence respectively；According to described first quantization parameter and described Second quantization parameter, encodes described area-of-interest and described regions of non-interest respectively；By the frame of video after coding It is pushed to described client, so that target Online Video described in described client terminal playing.Visible, this programme can by calculating Make area-of-interest and the bandwidth ratio of regions of non-interest that video quality is the highest, determine area-of-interest and non-region of interest The quantization parameter in territory, carries out subregion coding to each frame of video of target video, because the amount of the area-of-interest calculated Changing the parameter quantization parameter less than regions of non-interest, the video quality of corresponding area-of-interest is higher than regions of non-interest, institute Can realize playing the video that subregion definition is higher.

Certainly, arbitrary product or the method for implementing the present invention must be not necessarily required to reach all the above excellent simultaneously Point.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to Other accompanying drawing is obtained according to these accompanying drawings.

The schematic flow sheet of a kind of video pushing method that Fig. 1 provides for the embodiment of the present invention；

The structural representation of a kind of video push device that Fig. 2 provides for the embodiment of the present invention；

Bandwidth that Fig. 3 provides for the embodiment of the present invention, frame per second, optimal area-of-interest account for bandwidth ratio scatterplot；

Fig. 4 accounts for the curve assessment figure of bandwidth ratio and frame per second for the optimal area-of-interest that the embodiment of the present invention provides；

Fig. 5 accounts for the curve assessment figure of bandwidth ratio and bandwidth for the optimal area-of-interest that the embodiment of the present invention provides；

The normal curve rectangular histogram of the standardized residual that Fig. 6 provides for the embodiment of the present invention；

The P-P figure of the standardized residual that Fig. 7 provides for the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

In order to solve existing have technical problem, embodiments provide a kind of video pushing method and device.Below First a kind of video pushing method provided the embodiment of the present invention is introduced.

It should be noted that the embodiment of the present invention is preferably applied to server, server is connected with client communication.

The schematic flow sheet of a kind of video pushing method that Fig. 1 provides for the embodiment of the present invention, comprises the steps:

S101: obtain described client in real time for playing the network bandwidth of target Online Video；

It is emphasized that the above-mentioned network bandwidth refers to be currently used in the network bandwidth playing target Online Video, not Being the network bandwidth of client entirety, such as, client is also being downloaded data while playing target Online Video, then I Need to obtain in real time is to play the network bandwidth shared by target Online Video, the network that not including downloads data takies Bandwidth.

S102: judge whether the described network bandwidth meets the requirement playing described target Online Video, if it does not, perform S103；

Wherein, it is judged that whether the described network bandwidth meets the requirement playing described target Online Video, if it does not, perform S103, particularly as follows: client step S101 obtained in real time is used for playing the network bandwidth of target Online Video and presets The minimum network bandwidth required for playing target Online Video compares, if less than default minimal network bandwidth, then Perform step S103.

S103: determine rule according to presetting, determine in described target Online Video the area-of-interest of each frame of video with And regions of non-interest, wherein, described area-of-interest is the region that need not reduce video definition, described non-region of interest Territory is the region needing to reduce video definition；

Wherein, area-of-interest is particularly as follows: a part of image-region of concentrating most of observer's attention of image.Such as, People, when observing image, does not give equal attention to all regions in image, and often in image its Region (such as face) attention interested is higher, and relatively low to other region attention.

Concrete, determine rule according to presetting, determine the area-of-interest of each frame of video in described target Online Video And regions of non-interest, Ke Yiwei: determining rule according to presetting, determine described target Online Video does not plays video segment In the area-of-interest of each frame of video and regions of non-interest.Such as, the reproduction time of current goal Online Video enters Degree be 1 point 50 seconds, then, according to preset rules, determine the region of interest of the target Online Video 1 point each frame of video after 50 seconds Territory and regions of non-interest.

Concrete, determine rule according to presetting, determine the area-of-interest of each frame of video in described target Online Video And regions of non-interest, Ke Yiwei: each video in the described target Online Video that face recognition technology will be utilized to identify Face in frame, is defined as area-of-interest, will remove described area-of-interest in each frame of video in described target Online Video Outer region is defined as regions of non-interest.

S104: according to the described network bandwidth and the frame per second of described target Online Video, determine described area-of-interest and Regions of non-interest accounts for the ratio of described networking bandwidth respectively；

Concrete, according to the described network bandwidth and the frame per second of described target Online Video, determine described area-of-interest with And regions of non-interest accounts for the ratio of described networking bandwidth respectively, Ke Yiwei:

Video quality assessment is divided into objective evaluation and subjective evaluation, the method using objective evaluation in the embodiment of the present invention: G.1070 standard based on ITU-T (International Telecommunication Union-Telecommunication Standardization Sector), only needs the frame per second of video, bit rate, and packet loss is just A video quality estimation value can be obtained.

G.1070 model has 5 parts: parameter extraction unit, for the quality evaluation unit of coding distortion, for packet loss The quality evaluation unit of distortion, decoder error hide evaluation unit and coefficient data storehouse.Video quality V_qComputing formula For:

$V_q=1+I_{coding}\exp (-\frac{P_{plv}}{D_{P_{plv}}})$

Wherein: P_plvFor packet loss, packet loss can directly obtain from channel；For packet loss robustness sex factor, represent Video Stabilization quality robustness degree in packet loss environment.

First, from the bag of video flowing, bit rate, frame per second, code/decode type, video format and coding robustness etc. are obtained Information, and according to factors such as terminal type, termination property, surrounding brightness, from coefficient data storehouse, select specific coefficient Table.Video stream characteristics information and particular factor table are substituted into elementary video quality I of formula calculation code distortion effect_coding, depending on Frequently quality I affected by encoder in quality calculation formula_codingComputing formula is as follows:

$I_{coding}=I_{Ofr}\exp (-\frac{{\left(ln\right({\mathrm{Fr}}_v)-ln(O_{fr}\left)\right)}^2}{2{D_{frV}}^2})$

Wherein, O_frFor the frame per second of the best video quality under every kind of bit rate, computing formula is:

O_fr=v₁+v₂Br_v

Wherein, 1≤O_fr≤ 30, v₁And v₂For constant；

I_OfrFor the maximum video mass value in the case of each bit rate, computing formula is:

$I_{Ofr}=v_3-\frac{v_3}{1+{\left(\frac{{\mathrm{Br}}_v}{v_4}\right)}^{v_5}}$

Wherein, 0≤I_Ofr≤ 4, v₃、v₄、v₅For constant；

D_FrVThe robustness degree affected by frame per second change for video, computing formula is:

D_FrV=v₆+v₇Br_v

Wherein, 0≤D_FrV, v₆、v₇For constant.

The quality of area-of-interest and regions of non-interest is carried out quality evaluation respectively, and overall video quality is interested Region and regions of non-interest quality weighting sum, computing formula is:

V_q=w₁V_qBG+w₂V_qROI

Wherein, w₁+w₂=1, V_qBGFor the quality of regions of non-interest, V_qROIFor the quality of area-of-interest, w₁For non-sense The weight of the quality in interest region, w₂Weight for the quality of area-of-interest.

By video quality objective assessment models G.1070, video quality V is obtained_qWith network bandwidth Br_v, frame per second Fr_v, and Packet loss P_plvBetween relation be:

$V_q=1+(v_3-\frac{v_3}{1+{\left(\frac{{\mathrm{Br}}_v}{v_4}\right)}^{v_5}})\exp (-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2{\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7{\mathrm{Br}}_v)}^2}-\frac{P_{plv}}{v_{10}+v_{11}{e}^{-\frac{{\mathrm{Fr}}_v}{v_8}}+v_{12}{e}^{-\frac{{\mathrm{Br}}_v}{v_9}}})$

Wherein, v₁、v₂、v₃、v₄、v₅、v₆、v₇、v₈、v₉、v₁₀、v₁₁、v₁₂For with coded system, video frame rate, Video Key The constant coefficient that frame period is relevant with video resolution.

By packet loss P_plvValue be set to 0, as the above analysis: overall video quality V_qWith area-of-interest shared by whole The relation of body bandwidth ratio p:

$V_q=w_1(1+(v_3-\frac{v_3}{1+{\left(\frac{(1-p){\mathrm{Br}}_v}{v_4}\right)}^{v_5}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2\left(1-p\right){\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7(1-p\left){\mathrm{Br}}_v\right)}^2}\left)\right)+w_2(1+({v_3}^{\&prime;}-\frac{{v_3}^{\&prime;}}{1+{\left(\frac{{\mathrm{pBr}}_v}{{v_4}^{\&prime;}}\right)}^{{v_5}^{\&prime;}}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln ({v_1}^{\&prime;}+{v_2}^{\&prime;}{\mathrm{pBr}}_v\left)\right)}^2}{2{({v_6}^{\&prime;}+{v_7}^{\&prime;}{\mathrm{pBr}}_v)}^2}\left)\right)$

By overall video quality V_qP corresponding when being in optimum is defined as described area-of-interest and accounts for described networking bandwidth Ratio, is defined as 1-p described regions of non-interest and accounts for the ratio of described networking bandwidth, wherein, 0.5≤p < 1, v₁、v₂、v₃、 v₄、v₅、v₆、v₇、v₁'、v₂'、v₃'、v₄'、v₅'、v₆'、v₇' be and coded system, video frame rate, Video Key frame period and video The constant coefficient that resolution is relevant, Fr_vFor the frame per second of described target Online Video, Br_vFor the described network bandwidth, w₁For non-interested The weight coefficient in region, w₂Weight coefficient for area-of-interest.

Under conditions of various bandwidth and frame per second, v₁、v₂、、、v₇Calculation procedure as follows:

Step one: calculate I_ofr(the maximum video mass value in the case of each bit rate), O_fr(obtain maximum video quality Corresponding frame per second), D_frV(video quality is by frame per second and the robustness of bandwidth contributions), concrete formula is shown in above-mentioned analysis；

A, assume to have the different frame per second of M group and the various combination of bit rate, combination as shown in table 1:

Table 1

Brv	Frv	Vq
			bn	f1	Vqs(bn,f1)
bn	f2	Vqs(bn,f2)
			…	…	…
bn	fm	Vqs(bn,fm)
			…	…	…
bn	fM	Vqs(bn,fM)

Wherein, M represents frame per second number of combinations, f₁>f₂>…>f_M, V_qs(b_n,f_m) represent that MOS is at bit rate b_nWith frame per second f_mBar Value under part, illustrates herein for test video quality in the case of fixed bit rate.

B, by the data set in table 1 is applied to formulaIn, I_ofr, O_fr, D_frVValue Can be at every kind of bit rate b_nIn the case of use least square approximation method to calculate, as shown in table 2:

Table 2

Brv	Ofr	Iofr	DfrV
				b1	O1	I1	D1
b2	O2	I2	D2
				…	…	…	…
bn	On	In	Dn
				…	…	…	…
bN	ON	IN	DN

N is bandwidth varied number in cycle tests, wherein, b₁>b₂>…>b_N。

Step 2: design factor v₁、v₂:

By b in table 2_nAnd O_n, n=1,2 ... N, substitute into formula O_fr=v₁+v₂Br_vIn, use least square approximation to calculate Coefficient v₁,v₂。

Step 3: design factor v₃、v₄、v₅:

By b in table 2_nAnd I_n, n=1,2 ... N, substitute into formulaIn, use least square approximation Calculate coefficient v₃、v₄、v₅。

Step 4: design factor v₆、v₇:

By the b in table 2_n, D_n, n=1,2 ... N, apply to formula D_FrV=v₆+v₇Br_vIn, coefficient v₆、v₇Can pass through A young waiter in a wineshop or an inn takes advantage of approximation computation out.

Analyze area-of-interest below by instantiation and account for the optimal proportion of bandwidth:

By above-mentioned analysis it is recognised that overall video quality and area-of-interest account for total bandwidth ratio, bandwidth, the pass of frame per second System, uses statistical analysis software SPSS, and by difference frame per second, bandwidth makes the highest interested of video quality under the conditions of combining Region accounting example and these frame per second, bandwidth carries out multiple linear regression analysis, thus show that optimal area-of-interest accounts for bandwidth ratio Example and frame per second, the functional relation of bandwidth.Frame per second is from 5～30 frames/second, and amplification is 1 frame/second, bandwidth from 100～1000kbps, Amplification is 100, under every kind of frame per second, bandwidth combination, obtains optimal area-of-interest and accounts for bandwidth ratio, altogether 260 kinds of combinations.Band The scatterplot of width, frame per second and optimal area-of-interest accounting example is as shown in Figure 3.

Area-of-interest can not be apparent from from Fig. 3 and account for bandwidth ratio p and frame per second Fr_v, bandwidth B r_vBetween letter Number relational expression；Therefore, by p respectively with Fr_v、Br_vCarry out curve estimation analysis respectively.P and Fr_vAnd Br_vCurve estimation figure as figure Shown in 4 and Fig. 5, when Fig. 4 is for carrying a width of 400kbps, different Fr_vWith the curve estimation figure of p, Fig. 5 is frame per second when being 20fps, no Same Br_vCurve estimation figure with p.P and Fr is can be seen that by two curve estimation figures of Fig. 4 and Fig. 5_v、Br_vFunction model be:

$y=a_0+a_1{x}_1+a_2{x}_2+a_3{x}_1^2+a_4{x}_1{x}_2+a_5{x}_1^2{x}_2+a_6{x}_1{x}_2^2+a_7{x}_2^2+a_8{x}_1^3+a_9{x}_2^3$

Wherein, y represents p, x₁Represent Br_v, x₂Represent Fr_v.Formula is carried out variable replacement, i.e.x₁x₂=x₄, The like, obtain y and x₁～x₉Linear relationship be:

Y=a₀+a₁x₁+a₂x₂+a₃x₃+a₄x₄+a₅x₅+a₆x₆+a₇x₇+a₈x₈+a₉x₉

Use SPSS statistical analysis software, by y, x₁～x₉Data set carry out multiple linear regression analysis, draw above-mentioned public affairs Coefficient set in formula, as shown in table 3:

Table 3

Table 4 is analysis of variance table, as follows:

Table 4

Model	Quadratic sum	df	Mean square	F	Sig
						Return	8.126	9	0.903	484.546	0.000
Residual error	0.417	224	0.002
						Amount to	8.544	233

By the Sig value (statistical significance value) in table 4 it can be seen that above-mentioned y and x₁～x₉Relation equation linear regression bright Aobvious.

Fig. 6 is the normal curve rectangular histogram of standardized residual, it can be seen that standardized residual is normal distribution, and each point dissipates Point is linearly distributed near between straight line, explanatory variable in straight line up or down.

Fig. 7 is the P-P figure of standardized residual, it can be seen that two variable the most linearly trend, demonstrates Fig. 6 further Conclusion.

Fig. 6 and Fig. 7 demonstrates optimal area-of-interest and account between bandwidth ratio and bandwidth, frame per second and resolution is to meet Fit correlation.Therefore, above-mentioned regression equation meets linear and that variance is homogeneous inspection.

S105: according to described ratio, determine the first quantization parameter and non-region of interest that described area-of-interest is corresponding The second quantization parameter that territory is the most corresponding；

Concrete, according to described ratio, determine the first quantization parameter that described area-of-interest is corresponding and non-interested The second quantization parameter that region is the most corresponding, Ke Yiwei:

Account for the ratio of described networking bandwidth according to described area-of-interest and described regions of non-interest, calculate respectively Described area-of-interest and the bandwidth of described regions of non-interest:

Band shared by area-of-interest is a width of:

Br_vROI=pBr_v

Band shared by regions of non-interest is a width of:

Br_vBG=(1-p) Br_v

Wherein, Br_vFor the described network bandwidth, Br_vROIBandwidth shared by area-of-interest, Br_vBGFor regions of non-interest Shared bandwidth, p is overall bandwidth ratio shared by area-of-interest, 0.5≤p < 1.

According to bandwidth and the relation of quantization parameter, determine described first quantization parameter and described second quantization parameter, its In, bandwidth with the relation of quantization parameter is:

Br_v=aQP^-1+bQP^-2

Wherein, Br_vFor bandwidth, a with b is the model parameter relevant to frame type, and QP is quantization parameter.

S106: according to described first quantization parameter and described second quantization parameter, respectively to described area-of-interest and Described regions of non-interest encodes；

S107: the frame of video after coding is pushed to described client, so that target described in described client terminal playing is online Video.

Visible, this programme can make, by calculating, area-of-interest and the band of regions of non-interest that video quality is the highest Wide ratio, determines the quantization parameter of area-of-interest and regions of non-interest, each frame of video of target video is carried out subregion Territory encodes, because the quantization parameter of the area-of-interest calculated is less than the quantization parameter of regions of non-interest, corresponding interested The video quality in region is higher than regions of non-interest, it is possible to realize playing the video that subregion definition is higher.

Corresponding with said method embodiment, the embodiment of the present invention also provides for a kind of video push device.

The structural representation of a kind of video push device that Fig. 2 provides for the embodiment of the present invention, may include that bandwidth detection Module 201, bandwidth judge module 202, region division module 203, bandwidth ratio-dependent module 204, quantization parameter determine module 205, coding module 206, pushing module 207.

Wherein, bandwidth detection 201, for described bandwidth detection, it is used for for obtaining described client in real time Play the network bandwidth of target Online Video；

Bandwidth judge module 202, plays wanting of described target Online Video for judging whether the described network bandwidth meets Ask；

Region divides module 203, for when the judged result of bandwidth judge module is no, determines rule according to presetting, Determine area-of-interest and the regions of non-interest of each frame of video in described target Online Video, wherein, described interested Region is the region that need not reduce video definition, and described regions of non-interest is to need to reduce the region of video definition；

In actual applications, the region shown in the embodiment of the present invention divides module 203, specifically may be used for: according to presetting Determine rule, determine the area-of-interest of each frame of video do not play in video segment of described target Online Video and non- Area-of-interest.

In actual applications, the region shown in the embodiment of the present invention divides module 203, specifically may be used for: will utilize people In the described target Online Video that face identification technology identifies, the face in each frame of video, is defined as area-of-interest, by institute State the region removing described region of interest overseas in each frame of video in target Online Video and be defined as regions of non-interest.

Bandwidth ratio-dependent module 204, for according to the described network bandwidth and the frame per second of described target Online Video, determines Described area-of-interest and regions of non-interest account for the ratio of described networking bandwidth respectively；

In actual applications, the bandwidth ratio-dependent module 204 shown in the embodiment of the present invention, specifically may be used for:

According to overall video quality V_qWith area-of-interest shared by the relation of overall bandwidth ratio p:

$V_q=w_1(1+(v_3-\frac{v_3}{1+{\left(\frac{(1-p){\mathrm{Br}}_v}{v_4}\right)}^{v_5}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2\left(1-p\right){\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7(1-p\left){\mathrm{Br}}_v\right)}^2}\left)\right)+w_2(1+({v_3}^{\&prime;}-\frac{{v_3}^{\&prime;}}{1+{\left(\frac{{\mathrm{pBr}}_v}{{v_4}^{\&prime;}}\right)}^{{v_5}^{\&prime;}}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln ({v_1}^{\&prime;}+{v_2}^{\&prime;}{\mathrm{pBr}}_v\left)\right)}^2}{2{({v_6}^{\&prime;}+{v_7}^{\&prime;}{\mathrm{pBr}}_v)}^2}\left)\right)$

By overall video quality V_qP corresponding when being in optimum is defined as described area-of-interest and accounts for described networking bandwidth Ratio；1-p is defined as described regions of non-interest and accounts for the ratio of described networking bandwidth；

Wherein, 0.5≤p < 1, v₁、v₂、v₃、v₄、v₅、v₆、v₇、v₁'、v₂'、v₃'、v₄'、v₅'、v₆'、v₇' be and coding staff Formula, video frame rate, constant coefficient that Video Key frame period is relevant with video resolution, Fr_vFrame for described target Online Video Rate, Br_vFor the described network bandwidth, w₁For the weight coefficient of regions of non-interest, w₂Weight coefficient for area-of-interest.

Quantization parameter determines module 205, for according to described ratio, determining the first quantization that described area-of-interest is corresponding Second quantization parameter of parameter and regions of non-interest correspondence respectively；

In actual applications, the quantization parameter shown in the embodiment of the present invention determines module 205, specifically may be used for:

Account for the ratio of described networking bandwidth according to described area-of-interest and described regions of non-interest, calculate respectively Described area-of-interest and the bandwidth of described regions of non-interest；

According to bandwidth and the relation of quantization parameter, determine described first quantization parameter and described second quantization parameter, its In, bandwidth with the relation of quantization parameter is:

Br_v=aQP-¹+bQP-²

Wherein, Br_vFor bandwidth, a with b is the model parameter relevant to frame type, and QP is quantization parameter.

Coding module 206, for according to described first quantization parameter and described second quantization parameter, respectively to described sense Interest region and described regions of non-interest encode；

Pushing module 207, for the frame of video after coding is pushed to described client, so that described client terminal playing institute State target Online Video.

Visible, this programme can make, by calculating, area-of-interest and the band of regions of non-interest that video quality is the highest Wide ratio, determines the quantization parameter of area-of-interest and regions of non-interest, each frame of video of target video is carried out subregion Territory encodes, because the quantization parameter of the area-of-interest calculated is less than the quantization parameter of regions of non-interest, corresponding interested The video quality in region is higher than regions of non-interest, it is possible to realize playing the video that subregion definition is higher.

It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that Including process, method, article or the equipment of described key element there is also other identical element.

Each embodiment in this specification all uses relevant mode to describe, identical similar portion between each embodiment Dividing and see mutually, what each embodiment stressed is the difference with other embodiments.Real especially for device For executing example, owing to it is substantially similar to embodiment of the method, so describe is fairly simple, relevant part sees embodiment of the method Part illustrate.

One of ordinary skill in the art will appreciate that all or part of step realizing in said method embodiment is can Completing instructing relevant hardware by program, described program can be stored in computer read/write memory medium, The storage medium obtained designated herein, such as: ROM/RAM, magnetic disc, CD etc..

The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All Any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, are all contained in protection scope of the present invention In.

Claims (10)

1. a video pushing method, it is characterised in that be applied to server, described server is connected with client communication, side Method includes:

Obtain described client in real time for playing the network bandwidth of target Online Video；

Judge whether the described network bandwidth meets the requirement playing described target Online Video；

If it does not, according to preset determine rule, determine each frame of video in described target Online Video area-of-interest and Regions of non-interest, wherein, described area-of-interest is the region that need not reduce video definition, described regions of non-interest For needing to reduce the region of video definition；

According to the described network bandwidth and the frame per second of described target Online Video, determine described area-of-interest and non-region of interest Territory accounts for the ratio of described networking bandwidth respectively；

According to described ratio, determine the first quantization parameter and regions of non-interest correspondence respectively that described area-of-interest is corresponding The second quantization parameter；

According to described first quantization parameter and described second quantization parameter, emerging to described area-of-interest and described non-sense respectively Interest region encodes；

Frame of video after coding is pushed to described client, so that target Online Video described in described client terminal playing.

Method the most according to claim 1, it is characterised in that described basis is preset and determined rule, determines that described target exists The area-of-interest of each frame of video and regions of non-interest in line video, including:

Determine rule according to presetting, determine that the sense of each frame of video do not play in video segment of described target Online Video is emerging Interest region and regions of non-interest.

Method the most according to claim 1, it is characterised in that described basis is preset and determined rule, determines that described target exists The area-of-interest of each frame of video and regions of non-interest in line video, including:

In the described target Online Video that face recognition technology will be utilized to identify, the face in each frame of video, is defined as feeling emerging Interest region, will be defined as non-interested except the region that described region of interest is overseas in each frame of video in described target Online Video Region.

Method the most according to claim 1, it is characterised in that described regard online according to the described network bandwidth and described target The frame per second of frequency, determines that described area-of-interest and regions of non-interest account for the ratio of described networking bandwidth respectively, including:

According to overall video quality V_qWith area-of-interest shared by the relation of overall bandwidth ratio p:

$V_q=w_1(1+(v_3-\frac{v_3}{1+{\left(\frac{(1-p){\mathrm{Br}}_v}{v_4}\right)}^{v_5}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2\left(1-p\right){\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7(1-p\left){\mathrm{Br}}_v\right)}^2}\left)\right)+w_2(1+({v_3}^{\&prime;}-\frac{{v_3}^{\&prime;}}{1+{\left(\frac{{\mathrm{pBr}}_v}{{v_4}^{\&prime;}}\right)}^{{v_5}^{\&prime;}}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln ({v_1}^{\&prime;}+{v_2}^{\&prime;}{\mathrm{pBr}}_v\left)\right)}^2}{2{({v_6}^{\&prime;}+{v_7}^{\&prime;}{\mathrm{pBr}}_v)}^2}\left)\right)$

By overall video quality V_qP corresponding when being in optimum is defined as described area-of-interest and accounts for the ratio of described networking bandwidth； 1-p is defined as described regions of non-interest and accounts for the ratio of described networking bandwidth；

Wherein, 0.5≤p < 1, v₁、v₂、v₃、v₄、v₅、v₆、v₇、v₁'、v₂'、v₃'、v₄'、v₅'、v₆'、v₇' for coded system, regard Frequently frame per second, constant coefficient that Video Key frame period is relevant with video resolution, Fr_vFor the frame per second of described target Online Video, Br_v For the described network bandwidth, w₁For the weight coefficient of regions of non-interest, w₂Weight coefficient for area-of-interest.

Method the most according to claim 1, it is characterised in that described according to described ratio, determines described area-of-interest Second quantization parameter of the first corresponding quantization parameter and regions of non-interest correspondence respectively, including:

Account for the ratio of described networking bandwidth according to described area-of-interest and described regions of non-interest, calculate respectively is described Area-of-interest and the bandwidth of described regions of non-interest；

According to bandwidth and the relation of quantization parameter, determine described first quantization parameter and described second quantization parameter, wherein, band The wide relation with quantization parameter is:

Br_v=aQP^-1+bQP^-2

Wherein, Br_vFor bandwidth, a with b is the model parameter relevant to frame type, and QP is quantization parameter.

6. a video push device, it is characterised in that be applied to server, described server is connected with client communication, institute State device to include: bandwidth detection, bandwidth judge module, region division module, bandwidth ratio-dependent module, quantization parameter are true Cover half block, coding module, pushing module, wherein,

Described bandwidth detection, obtains described client for playing the network bandwidth of target Online Video in real time；

Described bandwidth judge module, for judging whether the described network bandwidth meets the requirement playing described target Online Video；

Described region divides module, for when the judged result of bandwidth judge module is no, determines rule according to presetting, determines The area-of-interest of each frame of video and regions of non-interest in described target Online Video, wherein, described area-of-interest For need not reduce the region of video definition, described regions of non-interest is to need to reduce the region of video definition；

Described bandwidth ratio-dependent module, for according to the described network bandwidth and the frame per second of described target Online Video, determines institute State area-of-interest and regions of non-interest accounts for the ratio of described networking bandwidth respectively；

Described quantization parameter determines module, for according to described ratio, determining the first quantization ginseng that described area-of-interest is corresponding Second quantization parameter of number and regions of non-interest correspondence respectively；

Described coding module, for according to described first quantization parameter and described second quantization parameter, emerging to described sense respectively Interest region and described regions of non-interest encode；

Described pushing module, for the frame of video after coding is pushed to described client, so that described in described client terminal playing Target Online Video.

Device the most according to claim 6, it is characterised in that described region divides module, specifically for:

Determine rule according to presetting, determine that the sense of each frame of video do not play in video segment of described target Online Video is emerging Interest region and regions of non-interest.

Device the most according to claim 6, it is characterised in that described region divides module, specifically for:

In the described target Online Video that face recognition technology will be utilized to identify, the face in each frame of video, is defined as feeling emerging Interest region, will be defined as non-interested except the region that described region of interest is overseas in each frame of video in described target Online Video Region.

Device the most according to claim 6, it is characterised in that described bandwidth ratio-dependent module, specifically for:

According to overall video quality V_qWith area-of-interest shared by the relation of overall bandwidth ratio p:

$V_q=w_1(1+(v_3-\frac{v_3}{1+{\left(\frac{(1-p){\mathrm{Br}}_v}{v_4}\right)}^{v_5}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln (v_1+v_2\left(1-p\right){\mathrm{Br}}_v\left)\right)}^2}{2{(v_6+v_7(1-p\left){\mathrm{Br}}_v\right)}^2}\left)\right)+w_2(1+({v_3}^{\&prime;}-\frac{{v_3}^{\&prime;}}{1+{\left(\frac{{\mathrm{pBr}}_v}{{v_4}^{\&prime;}}\right)}^{{v_5}^{\&prime;}}}\left)\exp \right(-\frac{{({\mathrm{lnFr}}_v-\ln ({v_1}^{\&prime;}+{v_2}^{\&prime;}{\mathrm{pBr}}_v\left)\right)}^2}{2{({v_6}^{\&prime;}+{v_7}^{\&prime;}{\mathrm{pBr}}_v)}^2}\left)\right)$

By overall video quality V_qP corresponding when being in optimum is defined as described area-of-interest and accounts for the ratio of described networking bandwidth； 1-p is defined as described regions of non-interest and accounts for the ratio of described networking bandwidth；

Wherein, 0.5≤p < 1, v₁、v₂、v₃、v₄、v₅、v₆、v₇、v₁'、v₂'、v₃'、v₄'、v₅'、v₆'、v₇' for coded system, regard Frequently frame per second, constant coefficient that Video Key frame period is relevant with video resolution, Fr_vFor the frame per second of described target Online Video, Br_v For the described network bandwidth, w₁For the weight coefficient of regions of non-interest, w₂Weight coefficient for area-of-interest.

Device the most according to claim 6, it is characterised in that described quantization parameter determines module, specifically for:

Account for the ratio of described networking bandwidth according to described area-of-interest and described regions of non-interest, calculate respectively is described Area-of-interest and the bandwidth of described regions of non-interest；

According to bandwidth and the relation of quantization parameter, determine described first quantization parameter and described second quantization parameter, wherein, band The wide relation with quantization parameter is:

Br_v=aQP^-1+bQP^-2

Wherein, Br_vFor bandwidth, a with b is the model parameter relevant to frame type, and QP is quantization parameter.