CN109218847A - A kind of download control method, device and multimedia terminal - Google Patents
A kind of download control method, device and multimedia terminal Download PDFInfo
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- CN109218847A CN109218847A CN201710525616.4A CN201710525616A CN109218847A CN 109218847 A CN109218847 A CN 109218847A CN 201710525616 A CN201710525616 A CN 201710525616A CN 109218847 A CN109218847 A CN 109218847A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/23805—Controlling the feeding rate to the network, e.g. by controlling the video pump
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
Abstract
The embodiment of the present invention provides a kind of download control method, device, multimedia terminal and computer storage medium, during downloading the fragment film source of current code rate, obtains real-time downloading rate;The downloading rate is the average download rate in the period for downloading to current time since the fragment film source;Downloading rate downloading rate speed limit threshold value corresponding with current code rate is compared, downloading rate speed limit threshold value is greater than the smooth playing rate of the fragment film source, and smooth playing rate is the minimum downloading rate of fragment film source described in smooth playing;When comparison result is greater than the downloading rate speed limit threshold value, pause downloading, restarting downloading when downloading rate is less than or equal to downloading rate speed limit threshold value;By the downloading rate speed limit threshold value of setting, the downloading rate for capableing of limiting terminal downloading slicing film source well will not be too high, but close or equal with the downloading rate threshold value, so as to solve the problems, such as excessively to occupy broadband resource.
Description
Technical field
The present invention relates to audio and video playing technical field more particularly to a kind of download control methods, device and multimedia
Terminal.
Background technique
With the fast development of mobile Internet, (Over The Top, OTT refer to that operation is crossed by Internet company to OTT
Quotient, develop various videos and data service business based on open the Internet) technology popularization and various intelligent terminals
Appearance, such as by the online watching video of the video terminals such as mobile phone, palm PC, set-top box, it is more and more common to become people
Amusement and recreation mode.The OTT business of mainstream is all based on the HLS (dynamic code of HTTP Live Streaming, Apple at present
Rate adaptive technique), DASH (Dynamic Adaptive Streaming over HTTP) or HSS (HTTP Smooth
Streaming) agreement is realized.The common ground of these agreements is all that film source is encoded into multiple code rates, then by various code rates
Film source is cut into several fragments for fixing duration, and the fragment of same sequence number corresponds to identical video content, rope in different code rates
The information of each fragment is described in detail in quotation part, and for instructing player, how played file is sliced.
Referring to Figure 1, by taking HLS protocol as an example, content include adaptive stream media content level-one index and it is multiple from
Adapt to streaming medium content secondary index and adaptive stream media content fragment composition.Adaptive stream media level-one index record is multiple
The adaptive stream media content secondary index of different code rates, adaptive stream media content secondary index record the media of corresponding code rate
Slicing files.By detecting the actual download rate of current downloading slicing, if being higher than the encoder bit rate of adjacent high code rate fragment,
After then having downloaded current slice, the fragment for being switched to the adjacent high code rate is downloaded;If actual download rate is lower than current
The encoder bit rate of fragment, then after having downloaded current slice, the fragment for being switched to adjacent low bit- rate is downloaded.
This mechanism may be implemented by fragment download play mode, when once detect network (that is to say actual download speed
Rate) it changes, the fragment for being switched to optimal code rates in time is downloaded, from broadcasting fluency and image sharpness or audio matter
Amount aspect reaches optimal result of broadcast.
But HLS, DASH or HSS agreement are not described the downloading rate strategy of terminal.If not to downloading rate
It controls, in the case where network environment is relatively good, it may appear that some period terminal downloads rate is very high, in a period of time later
Again without downloading the case where.Highest downloading rate may be several times more taller than the encoder bit rate of film source itself, and theoretical
As long as upper actual download rate reaches encoder bit rate, so that it may realize the smooth playing of the code rate film source, therefore excessively high downloading
Rate can only occupy network bandwidth resources, and the other users under consolidated network environment is caused to be affected, without clear to picture
Substantive help is generated in terms of clear degree or audio quality;If such case appears in the multimedia end of installation probe device simultaneously
It holds on (such as set-top box), the unstable third party's probe collection terminal plays state parameter that also results in of code stream curve misses
Difference influences the normal audio and video playing of terminal.
Summary of the invention
A kind of download control method, device and terminal provided in an embodiment of the present invention, main technical problems to be solved
Be: existing protocol is not described the downloading rate strategy to terminal, causes excessively to occupy Netowrk tape in film source downloading process
Wide resource, the problem of being unfavorable for the other users normal use of consolidated network environment.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of download control method, comprising:
During the fragment film source for downloading current code rate, real-time downloading rate is obtained, the downloading rate is described in
Fragment film source starts to download to the average download rate in the period at current time;
Downloading rate downloading rate speed limit threshold value corresponding with the current code rate is compared, the downloading speed
Rate speed limit threshold value is greater than the smooth playing rate of the fragment film source, and the smooth playing rate is fragment piece described in smooth playing
The minimum downloading rate in source;
When comparison result is greater than the downloading rate speed limit threshold value, pause downloading, until the downloading rate is less than
Downloading is restarted when equal to the downloading rate speed limit threshold value.
The embodiment of the present invention also provides a kind of download control device, comprising:
Module is obtained, for real-time downloading rate being obtained, under described during downloading the fragment film source of current code rate
Carrying rate is the average download rate in the period for downloading to current time since the fragment film source;
Comparison module, for comparing downloading rate downloading rate speed limit threshold value corresponding with the current code rate
Compared with the downloading rate speed limit threshold value is greater than the smooth playing rate of the fragment film source, and the smooth playing rate is smoothness
Play the minimum downloading rate of the fragment film source;
Processing module, for when comparison result is greater than the downloading rate speed limit threshold value, pause to be downloaded, until described
Downloading rate is less than or equal to restarting downloading when the downloading rate speed limit threshold value.
The embodiment of the present invention also provides a kind of multimedia terminal, comprising:
Memory, for being stored with download control program;
Processor realizes above-mentioned downloading control for executing the downloading rate stored in the memory control program
The step of method.
The embodiment of the present invention also provides a kind of computer storage medium, is stored with computer in the computer storage medium
Executable instruction, the computer executable instructions are used to execute download control method any one of above-mentioned.
The beneficial effects of the present invention are:
Download control method, device, multimedia terminal and the computer storage medium provided according to embodiments of the present invention,
During downloading the fragment film source of current code rate, real-time downloading rate is obtained;The downloading rate is from the fragment piece
Source starts to download to the average download rate in the period at current time;The downloading rate is corresponding with the current code rate
Downloading rate speed limit threshold value be compared, the downloading rate speed limit threshold value be greater than the fragment film source smooth playing speed
Rate, the smooth playing rate are the minimum downloading rate of fragment film source described in smooth playing;When comparison result is greater than described
When downloading rate speed limit threshold value, pause downloading, the weight when downloading rate is less than or equal to the downloading rate speed limit threshold value
New starting downloading;By the downloading rate speed limit threshold value of setting, it is capable of the downloading speed of limiting terminal downloading slicing film source well
Rate will not be too high, but close or equal with the downloading rate threshold value, so as to solve excessively to occupy asking for broadband resource
Topic;Meanwhile because downloading rate speed limit threshold value is greater than the smooth playing rate for the fragment film source currently downloaded, actual download
Rate is generally also to be slightly larger than the smooth playing rate, so can also guarantee the smooth playing of film source well.
Detailed description of the invention
Fig. 1 is the slice structure schematic diagram of film source;
Fig. 2 is the download control method flow diagram of the embodiment of the present invention one;
Fig. 3 is the download control method flow diagram of the embodiment of the present invention two;
Fig. 4 is the download control device structural schematic diagram of the embodiment of the present invention three;
Fig. 5 is the multimedia terminal structural schematic diagram of the embodiment of the present invention four.
Specific embodiment
The embodiment of the present invention is described in further detail below by specific embodiment combination attached drawing.
Embodiment one:
Terminal downloads rate policy is not described in order to solve existing protocol, terminal is caused to download corresponding film source
In the process, occur excessively occupying broadband resource, so that the normal use for the other users being unfavorable under consolidated network environment is asked
Topic, the embodiment of the present invention provide a kind of download control method.
Fig. 2 is referred to, download control method includes the following steps:
S21: during the fragment film source for downloading current code rate, real-time downloading rate is obtained.
In the present embodiment, downloading rate is under average in the period for downloading to current time since the fragment film source
Carry rate.Such as terminal is currently just in downloading slicing film source X1, downloads since the t1=0 moment, it is assumed that obtain at the t2=1ms moment
Current downloading rate is taken, specifically can be the capacity m1 for the fragment film source X1 that will have currently downloaded at this time divided by current institute
The downloading rate at t2=1ms moment, i.e. V2=m1/ (t2-t1) are obtained with the time (that is to say t2-t1=1ms).So as to calculate
The downloading rate of fragment film source any moment out, such as downloading rate of the fragment film source at the t3=2.5ms moment is V2=m2/
(t3-t1), it is assumed here that the capacity of the fragment film source X1 currently downloaded is m2.
It should be understood that when obtaining real-time downloading rate using aforesaid way, under needing to acquire current time
The capacity of the fragment film source carried is specifically acquired using existing any way, specifically, can pass through real-time detection end
The handling capacity of the network port at end is acquired, herein with no restrictions.
In the present embodiment, obtaining real-time downloading rate can carry out according to prefixed time interval, such as current slice piece
When the playing duration in source is 2ms, it can pass through at interval of the primary current downloading rate of the acquisitions such as 0.01ms, 0.1ms, 0.2ms
This high-precision acquisition of high-frequency, and downloading rate is controlled by subsequent step S22 and S23, it can sufficiently accurately control
Downloading rate processed, it is existing without seriously occupying broadband resource brought by rate limit so as to well solve, no
The problem of being handled conducive to the normal use of other users or same subterminal other application under consolidated network environment.
S22: downloading rate downloading rate speed limit threshold value corresponding with the current code rate is compared.
In the downloading rate downloading rate speed limit threshold value corresponding with current code rate of the downloading current slice film source got
It is compared.It, can should after getting the downloading rate specifically, the present embodiment is by preset mapping table
Downloading rate is matched with the preset relation table, so that corresponding downloading rate speed limit threshold value is obtained, by fast with the downloading
Rate speed limit threshold value is compared to obtain comparison result.In order to preferably understand, following table is referred to:
Table 1
Code rate | Downloading rate speed limit threshold value |
128kbps | 40KB/s |
256kbps | 70KB/s |
512kbps | 80KB/s |
For example, the code rate for the fragment film source currently downloaded is 128kbps, getting downloading rate at a certain moment is
60KB/s, as known from Table 1, the corresponding downloading rate speed limit threshold value of the fragment film source that code rate is 128kbps is 40KB/s, therefore will
Downloading rate 60KB/s downloading rate speed limit threshold value 40KB/s corresponding with the fragment film source is compared, and knows to compare knot at this time
Fruit is greater than downloading rate speed limit threshold value 40KB/s.
In the present embodiment, downloading rate speed limit threshold value is greater than the smooth playing rate for the fragment film source currently downloaded, wherein
Smooth playing rate is the minimum downloading rate of the smooth playing fragment film source.It should be noted that the fragment piece of same code rate
Source corresponds to unique smooth playing rate, theoretically when downloading rate reaches the smooth playing rate, can realize this point
The smooth playing of piece film source.It that is to say that downloading rate reaches the minimum downloading rate theory top and the fragment film source may be implemented
Smooth playing, such case be the smooth playing fragment film source and will not additionally occupy the limiting case of broadband resource completely, this
When can save broadband resource to greatest extent.
For example, the fragment film source for being 128kbps for code rate, smooth playing rate can be 128kbps/8b=
16KB/s refers to following table:
Table 2
Code rate | Smooth playing rate | Downloading rate speed limit threshold value |
128kbps | 16KB/s | 40KB/s |
256kbps | 32KB/s | 70KB/s |
512kbps | 64KB/s | 80KB/s |
In the present embodiment, downloading rate speed limit threshold value is greater than the corresponding smooth playing rate of the code rate, to better ensure that
Smooth it can download and play the fragment film source.
It should be understood that in practical application scene, however it is not limited to above-mentioned code rate numerical value and corresponding downloading speed
Rate speed limit threshold value, this programme can be applicable to the fragment film source of other code rates.
S23: when comparison result is greater than the downloading rate speed limit threshold value, pause downloading, until the downloading rate
Downloading is restarted when less than or equal to the downloading rate speed limit threshold value.
When current downloading rate is greater than corresponding downloading rate speed limit threshold value, pause downloading, thus under indirect limitation
Rate is carried, restarting downloading, protects the downloading rate when downloading rate is less than or equal to the downloading rate speed limit threshold value
It holds and (is slightly larger than, is equal to or slightly less than) in the downloading rate speed limit Near Threshold.
Pause downloading, reaches limitation downloading rate, substantially: during suspending downloading, not to the fragment piece
Source is downloaded, and that is to say the capacity of the current fragment film source, there is no variations, and total time is constantly increasing
Add (time including suspending process), it is constant in m (namely capacity of downloading) according to v=m/t, when t (total time) becomes larger, v
(namely downloading rate) is then corresponding to be reduced, to realize the effect of limitation downloading rate.
It should be understood that this programme completely can be in such a way that other limit downloading rate, herein with no restrictions.
When comparison result is greater than corresponding downloading rate speed limit threshold value, need to suspend downloading to limit downloading speed
Rate, this example provide the mode of two kinds of calculating time outs:
Mode one: downloading being suspended according to preset time out length, when the preset time out length reaches,
Current downloading rate is calculated, when judging that the current downloading rate is greater than the downloading rate speed limit threshold value, continues to suspend
Preset time out length, when current downloading rate is less than or equal to the downloading rate speed limit threshold value under restarting
It carries.
For example, current downloading rate is V4=10KB/1s=10KB/s, 10KB is certain fragment currently downloaded here
The capacity (assume that the fragment film source capacity be 20KB) of film source, 1s are that start to download the fragment film source total to current time
Time span altogether, so that obtaining downloading rate is V4=10KB/s, it is assumed that downloading rate V4=10KB/s is greater than the fragment piece
The corresponding downloading rate speed limit threshold value 5KB/s in source, illustrates to produce higher occupancy to broadband resource at this time, it is therefore desirable to this
Downloading rate is limited, and suspends preset time out length first, it is assumed that is 0.5 second, is reached it to time out length
Afterwards, then judge current downloading rate V5=10KB/ (1s+0.5s)=6.67KB/s, downloading rate limit is still greater than at this time
Fast threshold value, therefore continue to suspend 0.5s, downloading rate V5=10KB/ (1.5s+0.5s)=5KB/s current at this time, it is small
In being equal to downloading rate speed limit threshold value 5KB/s, at this point, the just restarting downloading remaining 10KB capacity of the fragment film source.
Mode two: calculating actually required time out length according to preset rules, long in the actually required time out
Restarting downloading when degree reaches;Wherein preset rules are the capacity for the fragment film source currently downloaded divided by the fragment piece
The corresponding downloading rate speed limit threshold value in source, then subtract Zi the time span for starting to download the fragment film source to current time.
For example, the capacity for certain the fragment film source currently downloaded is that 0.1KB (assume that the fragment film source capacity is
0.5KB), the total time length for starting to download the fragment film source to current time is 1ms (wherein 1ms is equal to 0.001s), with
The corresponding downloading rate speed limit threshold value of the fragment film source is 80KB/s, can be calculated according to the preset rules that this programme provides at this time
The time span T=0.1/80-0.001=0.00025s=0.25ms of pause is actually needed out, that is to say currently practical required
The time span of pause is 0.25ms, and after suspending 0.25ms, current downloading rate is just equal to the downloading rate speed limit threshold value
For 80KB/s.Compared with aforesaid way one, while reaching limitation downloading rate, pause can be calculated to avoid multiple.
In the present embodiment, further the corresponding downloading rate speed limit threshold value of current code rate can be set greater than to be equal to and be somebody's turn to do
The smoothness playback rate of the adjacent high level-one code rate fragment film source of current code rate;The corresponding downloading rate of highest code rate fragment film source
Speed limit threshold value is greater than the smooth playing rate of itself.
It should be noted that there may be the fragment film sources of different code rates for different film sources, such as film source P may be deposited
In the piece source file of the following two kinds difference code rate:
Table 3
It should be understood that can use and take accordingly during film source P (analog quantity) is carried out digital coding
Sample rate, to form the film source of phase code rate, sampling rate is higher, and the file for encoding out is just closer to original document, image
And/or sound quality is better.Fragment is carried out according to fixed duration to the piece source file of same code rate, obtains the fragment piece of same code rate
Source.In general, the fragment piece source contents of same slice serial number are identical (certainly due to the fragment film source of low bit- rate and high code rate
Sampling rate used by fragment film source is different, therefore image or audio quality are different), referring to table 4, wherein fragment piece
The content in source 11 and fragment source 21 should be it is identical, the content in fragment film source 12 and fragment source 22 should be identical, fragment
Film source 13 and the content in fragment source 23 should be identical.Certainly, if there is also other fragment film sources (when practical application, table 4
Middle code rate is that the film source of 16kbps is not limited to these three fragment film sources of fragment film source 11, fragment film source 12, fragment film source 11, can
Can include thousands of a fragment film sources), principle is the same.
Table 4
In the present embodiment, further the corresponding downloading rate speed limit threshold value of current code rate can be set greater than to be equal to and be somebody's turn to do
The smoothness playback rate of the adjacent high level-one code rate fragment film source of current code rate.Here the adjacent high level-one code rate of current code rate is simultaneously
It is not necessarily adjacent (such as the code rate grade of the code rate grade 32kbps of 16kbps is adjacent) of code rate grade, but should basis
The code rate grade of the film source physical presence is determined.Here be illustrated with table 4, it is assumed that film source P there is only 16kbps and
The piece source file of two kinds of code rate grades of 64kbps, high first level bit-rate adjacent with 16kbps at this time are then the film source of the 64kbps
File, because it is the slicing files of 32kbps there is no code rate.
With continued reference to table 4, here then by the downloading rate speed limit threshold value (10KB/ for the fragment film source that code rate is 16kbps
S) it is set as to guarantee to download the code rate well slightly larger than the smooth playing rate 8KB/s for the film source that code rate is 64kbps
The downloading rate of fragment film source reach 8KB/s (certain network bandwidth should be greater than 8KB/s), and according to existing protocol,
To realize that free switching is downloaded to code rate for the corresponding fragment film source in 64kbps.For example, the fragment film source currently downloaded
When for fragment film source 11, when determining that needing to be switched to the film source that code rate is 64kbps is downloaded, then fragment film source will be selected
22 are downloaded (identical when the content of fragment film source 22 is with fragment film source 12), realize the smooth playing of film source P.
It should be understood that since highest code rate is there is no more higher than its code rate, the present embodiment is by highest code rate fragment
The corresponding downloading rate speed limit threshold value of film source is set greater than the smooth playing rate of the highest code rate.In current network bandwidth foot
When enough, the downloading rate for downloading the fragment film source is limited in the downloading rate speed limit Near Threshold, guarantees that it can be realized just
Normal code rate switching, meanwhile, it avoids the problem that seriously occupying network bandwidth resources in downloading process.
During downloading corresponding film source, if it is determined that will overflow or reach preset caching threshold in terminal buffers
It when value, can be downloaded again after for a period of time with mandatory pause, or currently used downloading rate speed limit threshold value is temporarily cut
It is changed to the corresponding smooth playing rate of current code rate, when judging terminal buffers lower than preset cache threshold, then switches back into phase
The downloading rate speed limit threshold value answered.It avoids being overflowed by terminal buffers with this, influences the normal play of terminal.
The embodiment of the present invention provides a kind of download control method, during downloading the fragment film source of current code rate, obtains
Real-time downloading rate;Downloading rate downloading rate speed limit threshold value corresponding with current code rate is compared, wherein downloading
Rate speed limit threshold value is greater than the smooth playing rate of the fragment film source, when downloading rate is greater than downloading rate speed limit threshold value, temporarily
It stops load, restarting downloading when downloading rate is less than or equal to downloading rate speed limit threshold value;Pass through the downloading rate of setting
Speed limit threshold value can limiting terminal downloading slicing well guaranteeing that terminal can download normally and in the case where smooth playing
The downloading rate of film source will not be too high, but close or equal with the downloading rate threshold value, so as to solve excessively to occupy
The problem of broadband resource, therefore also avoid impacting the use of the other users under consolidated network environment;Meanwhile because
Downloading rate speed limit threshold value is greater than the smooth playing rate for the fragment film source currently downloaded, therefore actual download rate is generally also
Slightly larger than the smooth playing rate, so can also guarantee the smooth playing of film source well.Further, by current code rate
Corresponding downloading rate speed limit threshold value is set greater than the smooth playing rate of the first-class level bit-rate of the height adjacent equal to the code rate, protects
It can freely realize that code rate switches in card fragment film source downloading process, while be also beneficial to guarantee the gentle of code stream, avoid down
It carries code stream curve and the case where wave crest or trough occurs, this can be effectively reduced the influence to third party's probe function.
Embodiment two:
The embodiment of the present invention on the basis of example 1, provides a kind of download control method, and combine specific example
It is illustrated, to better understand the invention.
Fig. 3 is referred to, download control method provided in this embodiment includes the following steps:
S301: the fragment film source that downloading code rate is VL.
The present embodiment is by taking network direct broadcasting as an example, it is assumed that there are VL (low bit- rate), VM (middle code rate), VH are (high for the network direct broadcasting
Code rate) these three code rates piece source file, user by terminal (such as mobile phone, Web TV etc.) start viewing when, namely
It has been to broadcast the stage, the fragment film source that can choose any one code rate is downloaded, or is carried out according to preset code rate
Downloading, for example, system default code rate or user's manual setting code rate, the present embodiment is to this and with no restrictions.The present embodiment
Assuming that downloading the fragment film source of low bit- rate VL first.
S302: control downloading rate is less than or equal to 1.1VM.
In the present embodiment, preset mapping table is as follows:
Table 5
Code rate | Downloading rate speed limit threshold value |
Low bit- rate VL | 1.1VM |
Middle code rate V M | 1.1VH |
High code rate V H | 1.2VH |
Therefore when current code rate is VL, corresponding downloading rate speed limit threshold value is 1.1VM, then controls the downloading
Rate is less than or equal to 1.1VM.The downloading rate speed limit threshold value being arranged through this embodiment, can guarantee each code rate fragment film source
Normal downloading and smooth playing, while higher broadband resource will not be occupied, and different code rates point in downloading process may be implemented
Piece film source switching downloading (such as downloading low bit- rate VL fragment film source downloading rate between VM and 1.1VM when, then it is next
Fragment film source will be switched to middle code rate V M and be downloaded).
The specific implementation procedure of above-mentioned steps S302 refers to the step S22 and S23 of embodiment one, and details are not described herein.
S303: judge whether the fragment film source (code rate VL) downloading is completed;If so, going to step S304;If not, going to
Step S301.
S304: judge whether the downloading rate for downloading the fragment film source (code rate VL) reaches VM (adjacent high grade code
The smooth playing rate of rate);If so, going to step S305;If not, going to step S306.
S305: the corresponding fragment film source that downloading code rate is VM.
It that is to say after the fragment film source that downloading completes that above-mentioned code rate is VL, if downloading the downloading speed of the fragment film source
Rate has reached VM (between VM and 1.1VM), then is switched to next corresponding fragment film source that code rate is VM and is downloaded, to improve
The quality of video and/audio.
S306: continue to download next corresponding fragment film source that code rate is VL.
S307: control downloading rate is less than or equal to 1.1VH.
When the code rate for the fragment film source currently downloaded is VM, its downloading rate is controlled less than or equal to 1.1VH.
S308: judge whether the fragment film source (code rate VM) downloading is completed;If so, going to step S309;If not, going to
Step S305.
If the fragment film source (code rate VM) does not download completion, continuing downloading (that is to say and go to step
S305)。
S309: judge whether the downloading rate for downloading the fragment film source (code rate VM) reaches VH;If so, going to step
S310;If not, going to step S311.
S310: the corresponding fragment film source that downloading code rate is VH.
After the fragment film source (code rate VM) is completed in downloading, and download the downloading speed of the fragment film source (code rate VM)
When rate reaches VH (the smooth playing rate of adjacent high first-class level bit-rate), the corresponding fragment film source for being switched to the VH of code rate is carried out down
It carries.
S311: judge whether the downloading rate for downloading the fragment film source (code rate VM) reaches VM;If so, going to step
S312;If not, going to step S313.
S312: next corresponding fragment film source that downloading code rate is VM.
S313: it is switched to the corresponding fragment film source that code rate is VL and is downloaded.
S314: control downloading rate is less than or equal to 1.2VH.
S315: judge whether the fragment film source (code rate VH) downloading is completed;If so, going to step S316;If not, going to
Step S310.
If downloading does not complete, continue the remainder for downloading the fragment film source.
S316: judge whether the downloading rate for downloading the fragment film source (code rate VH) reaches VH;If so, going to step
S317;If not, going to step S318.
S317: next corresponding fragment film source that downloading code rate is VH.
S318: next corresponding fragment film source that downloading code rate is VM.
If the downloading rate for downloading the fragment film source (code rate VH) has reached VH (between VH and 1.2VH), continue
Download next corresponding fragment film source of the code rate (VH);Otherwise, the corresponding fragment film source that downloading code rate is VM, to guarantee broadcasting
Fluency.
Embodiment three:
The embodiment of the present invention provides a kind of download control device, for realizing two institute of above-described embodiment one and/or embodiment
The step of download control method stated.
Fig. 4 is referred to, download control device 40 provided in this embodiment includes obtaining module 41, comparison module 42 and place
Manage module 43.Module 41 is wherein obtained to be used to obtain real-time downloading rate during downloading the fragment film source of current code rate,
The downloading rate is the average download rate in the period for downloading to current time since the fragment film source.
Obtaining module 41 can be opened by obtaining the fragment film source capacity currently downloaded divided by from the fragment film source
Beginning downloads to the time at current time, obtains the downloading rate of the fragment film source.Specifically may be used it should be understood that obtaining module 41
With the capacity for the fragment film source that the handling capacity by the network port of real-time detection terminal obtains currently having downloaded.Certainly,
The present embodiment is not limited to which kind of mode to obtain real-time downloading rate using, can arbitrarily select existing acquisition modes.
Acquisition module 41 obtains real-time downloading rate can carry out according to prefixed time interval, such as current slice film source
Playing duration when being 10ms, can pass through at interval of the primary current downloading rate of the acquisitions such as 0.01ms, 0.1ms, 0.5ms
This high-precision acquisition of high-frequency, and downloading rate is controlled by subsequent step S22 and S23, it can sufficiently accurately control
Downloading rate processed, it is existing without seriously occupying broadband resource brought by rate limit so as to well solve, no
The problem of being handled conducive to the normal use of other users or same subterminal other application under consolidated network environment.
Comparison module 42 is for will acquire the downloading rate downloading rate corresponding with current code rate that module 41 is got
Speed limit threshold value is compared.Wherein downloading rate speed limit threshold value is greater than the smooth playing rate of the fragment film source, should illustrate
It is that smooth playing rate is corresponding for the minimum downloading rate of the smooth playing fragment film source namely the code rate of the fragment film source
Rate.
The present embodiment compares mould after obtaining module 41 and getting the downloading rate by preset mapping table
Block 42 can match the downloading rate with the preset relation table, to obtain corresponding downloading rate speed limit threshold value, lead to
It crosses and is compared to obtain comparison result with the downloading rate speed limit threshold value.
In the present embodiment, downloading rate speed limit threshold value is greater than the smooth playing rate for the fragment film source currently downloaded, wherein
Smooth playing rate is the minimum downloading rate of the smooth playing fragment film source.It should be noted that the fragment piece of same code rate
Source corresponds to unique smooth playing rate, theoretically when downloading rate reaches the smooth playing rate, can realize this point
The smooth playing of piece film source.It that is to say that downloading rate reaches the minimum downloading rate theory top and the fragment film source may be implemented
Smooth playing, such case be the smooth playing fragment film source and will not additionally occupy the limiting case of broadband resource completely, this
When can save broadband resource to greatest extent.
Processing module 43 is used for when the comparison result that comparison module 42 obtains is greater than the downloading rate speed limit threshold value, temporarily
It stops load, restarting downloading when downloading rate is less than or equal to downloading rate speed limit threshold value.By controlling download time, come
Downloading rate is limited, restarting downloading, makes the downloading when downloading rate is less than or equal to the downloading rate speed limit threshold value
Rate is maintained at the downloading rate speed limit Near Threshold.
In the present embodiment, processing module 43, can be according to preset time out length when determining that needs suspend downloading
Suspended (such as time out length according to simulation result flexible setting), is reached in the preset time out length
When, current downloading rate is calculated, when judging that current downloading rate is greater than the downloading rate speed limit threshold value, continues to suspend
The preset time out length opens again when current downloading rate is less than or equal to the downloading rate speed limit threshold value
Dynamic downloading.
Actually required time out length can also be calculated according to preset rules, be reached in the actually required time out length
Then restarting downloading;Wherein preset rules are the capacity for the fragment film source currently downloaded divided by the fragment film source pair
The downloading rate speed limit threshold value answered, then subtract Zi the time span for starting to download the fragment film source to current time.
In the present embodiment, further the corresponding downloading rate speed limit threshold value of current code rate can be set greater than to be equal to and be somebody's turn to do
The smoothness playback rate of the adjacent high level-one code rate fragment film source of current code rate;The corresponding downloading rate of highest code rate fragment film source
Speed limit threshold value is greater than the smooth playing rate of itself.It, can also be further by the corresponding downloading speed of current code rate in the present embodiment
Rate speed limit threshold value is set greater than the smoothness playback rate for being equal to and deserving the adjacent high level-one code rate fragment film source of preceding code rate.
It should be understood that since highest code rate is there is no more higher than its code rate, the present embodiment is by highest code rate fragment
The corresponding downloading rate speed limit threshold value of film source is set greater than the smooth playing rate of the highest code rate.In current network bandwidth foot
When enough, the downloading rate for downloading the fragment film source is limited in the downloading rate speed limit Near Threshold, guarantees that it can be realized just
Normal code rate switching, meanwhile, it avoids the problem that seriously occupying network bandwidth resources in downloading process.
During downloading corresponding film source, if it is determined that will overflow or reach preset caching threshold in terminal buffers
It when value, can be downloaded again after for a period of time with mandatory pause, or currently used downloading rate speed limit threshold value is temporarily cut
It is changed to the corresponding smooth playing rate of current code rate, when judging terminal buffers lower than preset cache threshold, then switches back into phase
The downloading rate speed limit threshold value answered.It avoids being overflowed by terminal buffers with this, influences the normal play of terminal.
Processing module 43 is also used to after having downloaded the fragment film source of current code rate, the fragment of code rate before downloading is deserved
When the downloading rate of film source reaches the smoothness playback rate of the adjacent high level-one code rate fragment film source of current code rate, it is switched to corresponding
High level-one code rate fragment film source be downloaded.
Processing module 43 is also used to after having downloaded the fragment film source of current code rate, is lower than current code rate in downloading rate
Fragment film source smoothness playback rate when, be switched to the corresponding low level-one code rate fragment film source adjacent with current code rate and carry out
Downloading.To freely realize the switching between different code rates in fragment film source downloading process.
In this example, obtaining module, comparison module and processing module can be realized by processor or controller etc..
Download control device 40 provided in an embodiment of the present invention includes obtaining module 41, comparison module 42 and processing module
43, it is used to obtain real-time downloading rate during downloading the fragment film source of current code rate, compare mould wherein obtaining module 41
Block 42 is compared for will acquire the downloading rate downloading rate speed limit threshold value corresponding with current code rate that module 41 is got
Compared with processing module 43 is used for when the comparison result that comparison module 42 obtains is greater than the downloading rate speed limit threshold value, under pause
It carries, restarting downloading when downloading rate is less than or equal to downloading rate speed limit threshold value;Processing module 43 is also used to downloading
After the fragment film source of complete current code rate, it is adjacent to reach current code rate for the downloading rate of the fragment film source of code rate before downloading is deserved
High level-one code rate fragment film source smoothness playback rate when, be switched to corresponding high level-one code rate fragment film source and be downloaded;
Processing module 43 is also used to after having downloaded the fragment film source of current code rate, is lower than the fragment piece of current code rate in downloading rate
When the smoothness playback rate in source, it is switched to the corresponding low level-one code rate fragment film source adjacent with current code rate and is downloaded.From
And the switching between different code rates is freely realized in fragment film source downloading process.This programme can allow free terminal to realize code rate
Switching up and down, while guaranteeing the gentle of code stream as far as possible, avoid download code flow curve from the case where wave crest or trough occur, thus right
Network has an impact, or has an impact to third party's probe business function.
Example IV:
The embodiment of the present invention provides a kind of multimedia terminal 50, Fig. 5, including memory 51 is referred to, for being stored with down
Carry control program;Processor 52 is used to execute the downloading rate control program stored in memory to realize above-described embodiment one
And/or described in embodiment two the step of downloading rate control method, comprising:
During the fragment film source for downloading current code rate, real-time downloading rate is obtained;By the downloading rate with it is described
The current corresponding downloading rate speed limit threshold value of code rate is compared, when comparison result is greater than the downloading rate speed limit threshold value
When, pause downloading, the restarting downloading when downloading rate is less than or equal to the downloading rate speed limit threshold value.
Processor 52 executes step, pause downloading, until the downloading rate is less than or equal to the downloading rate speed limit threshold
Restarting downloading includes: and is suspended to download according to preset time out length when value, in the preset time out length
When arrival, current downloading rate is calculated, when judging that the current downloading rate is greater than the downloading rate speed limit threshold value,
Continue to suspend the preset time out length, until current downloading rate is less than or equal to the downloading rate speed limit threshold value
When restarting downloading.
Alternatively, processor 52 executes step, pause downloading, until the downloading rate is limited less than or equal to the downloading rate
Restarting downloading includes: to calculate actually required time out length according to preset rules when fast threshold value, described actually required
Downloading is restarted when time out length reaches;The preset rules are the capacity for the fragment film source currently downloaded
Divided by the corresponding downloading rate speed limit threshold value of the fragment film source, then subtract Zi starting to download the fragment film source to current time
Time span.
In the present embodiment, the corresponding downloading rate speed limit threshold value of current code rate is more than or equal to the adjacent height of the current code rate
The smoothness playback rate of level-one code rate fragment film source;The corresponding downloading rate speed limit threshold value of highest code rate fragment film source is greater than itself
Smooth playing rate.Processor 52 is also used to execute the download control program stored in memory 51, to realize following steps:
After having downloaded the fragment film source of current code rate, in the downloading rate for the fragment film source for downloading the current code rate
When reaching the smoothness playback rate of the adjacent high level-one code rate fragment film source of the current code rate, it is switched to corresponding high one-level code
Rate fragment film source is downloaded.
In the present embodiment, processor 52 is also used to execute the download control program stored in memory 51, as follows to realize
Step:
After having downloaded the fragment film source of current code rate, it is lower than the fragment piece of the current code rate in the downloading rate
When the smoothness playback rate in source, it is switched to the corresponding low level-one code rate fragment film source adjacent with the current code rate and carries out down
It carries.
In the present embodiment, multimedia terminal 50 is specifically including but not limited to mobile phone, set-top box, tablet computer, Web TV
Deng.
It includes: memory 51 for being stored with download control program that the embodiment of the present invention, which provides a kind of multimedia terminal 50,;
Processor 52 is used to execute the step of downloading rate control program stored in the memory is to realize download control method;Solution
Determined excessive occupancy broadband resource the problem of, avoid and the use of the other users under consolidated network environment impacted;Into
Guarantee to one step freely realize that code rate switches in fragment film source downloading process, while being also beneficial to guarantee the gentle of code stream,
It avoids download code flow curve and the case where wave crest or trough occurs, this can be effectively reduced the influence to third party's probe function.
Obviously, those skilled in the art should be understood that each module of the embodiments of the present invention or each step can be used
General computing device realizes that they can be concentrated on a single computing device, or be distributed in multiple computing device institutes
On the network of composition, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by them
It is stored in computer storage medium (ROM/RAM, magnetic disk, CD) and is performed by computing device, and in some cases, it can
With the steps shown or described are performed in an order that is different from the one herein, or they are fabricated to each integrated circuit dies
Block, or single integrated circuit module is maked multiple modules or steps in them to realize.So the present invention does not limit
It is combined in any specific hardware and software.
The above content is combining specific embodiment to be further described to made by the embodiment of the present invention, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention
Protection scope.
Claims (10)
1. a kind of download control method characterized by comprising
During the fragment film source for downloading current code rate, real-time downloading rate is obtained, the downloading rate is from the fragment
Film source starts to download to the average download rate in the period at current time;
Downloading rate downloading rate speed limit threshold value corresponding with the current code rate is compared, the downloading rate limit
Fast threshold value is greater than the smooth playing rate of the fragment film source, and the smooth playing rate is fragment film source described in smooth playing
Minimum downloading rate;
When comparison result is greater than the downloading rate speed limit threshold value, pause downloading, until the downloading rate is less than or equal to
Downloading is restarted when the downloading rate speed limit threshold value.
2. download control method as described in claim 1, which is characterized in that the pause downloading, until the downloading rate
Restarting, which is downloaded, when less than or equal to the downloading rate speed limit threshold value includes:
Suspended according to preset time out length and downloaded, when the preset time out length reaches, calculated current
Downloading rate continues to suspend described default when judging that the current downloading rate is greater than the downloading rate speed limit threshold value
Time out length, until current downloading rate be less than or equal to the downloading rate speed limit threshold value when restarting downloading.
3. download control method as claimed in claim 2, which is characterized in that the pause downloading, until the downloading rate
Restarting, which is downloaded, when less than or equal to the downloading rate speed limit threshold value includes:
Actually required time out length is calculated according to preset rules, again when the actually required time out length reaches
Starting downloading;
The preset rules are the capacity for the fragment film source currently downloaded divided by the corresponding downloading of the fragment film source
Rate speed limit threshold value, then subtract Zi the time span for starting to download the fragment film source to current time.
4. the download control method as described in claim 1-3, which is characterized in that the corresponding downloading rate limit of the current code rate
Fast threshold value is more than or equal to the smoothness playback rate of the adjacent high level-one code rate fragment film source of the current code rate;Highest code rate fragment
The corresponding downloading rate speed limit threshold value of film source is greater than the smooth playing rate of itself;
The download control method further include: after having downloaded the fragment film source of current code rate, downloading the current code rate
The downloading rate of fragment film source when reaching the smoothness playback rate of the adjacent high level-one code rate fragment film source of the current code rate,
Corresponding high level-one code rate fragment film source is switched to be downloaded.
5. download control method as claimed in claim 4, which is characterized in that the method also includes: work as former code having downloaded
After the fragment film source of rate, in smoothness playback rate of the downloading rate lower than the fragment film source of the current code rate, cut
The corresponding low level-one code rate fragment film source adjacent with the current code rate is changed to be downloaded.
6. a kind of download control device characterized by comprising
Module is obtained, for during downloading the fragment film source of current code rate, obtaining real-time downloading rate, the downloading speed
Rate is the average download rate in the period for downloading to current time since the fragment film source;
Comparison module, for downloading rate downloading rate speed limit threshold value corresponding with the current code rate to be compared,
The downloading rate speed limit threshold value is greater than the smooth playing rate of the fragment film source, and the smooth playing rate is smooth playing
The minimum downloading rate of the fragment film source;
Processing module, for when comparison result is greater than the downloading rate speed limit threshold value, pause to be downloaded, until the downloading
Rate is less than or equal to restarting downloading when the downloading rate speed limit threshold value.
7. download control device as claimed in claim 6, which is characterized in that the processing module is used for according to preset pause
Time span pause downloading calculates current downloading rate, described in judgement when the preset time out length reaches
When current downloading rate is greater than the downloading rate speed limit threshold value, continue to suspend the preset time out length, until
Current downloading rate is less than or equal to restarting downloading when the downloading rate speed limit threshold value.
8. download control device as claimed in claim 6, which is characterized in that processing module is used to be calculated according to preset rules real
Time out length needed for border restarts downloading when the actually required time out length reaches;
The preset rules are the capacity for the fragment film source currently downloaded divided by the corresponding downloading of the fragment film source
Rate speed limit threshold value, then subtract Zi the time span for starting to download the fragment film source to current time.
9. such as the described in any item download control devices of claim 6-8, which is characterized in that the corresponding downloading of the current code rate
Rate speed limit threshold value is more than or equal to the smoothness playback rate of the adjacent high level-one code rate fragment film source of the current code rate;Highest code
The corresponding downloading rate speed limit threshold value of rate fragment film source is greater than the smooth playing rate of itself;
The processing module is also used to after having downloaded the fragment film source of current code rate, in the fragment for downloading the current code rate
When the downloading rate of film source reaches the smoothness playback rate of the adjacent high level-one code rate fragment film source of the current code rate, it is switched to
Corresponding high level-one code rate fragment film source is downloaded;
The processing module is also used to after having downloaded the fragment film source of current code rate, is worked as in the downloading rate lower than described
When the smoothness playback rate of the fragment film source of preceding code rate, it is switched to the corresponding low level-one code rate adjacent with the current code rate point
Piece film source is downloaded.
10. a kind of multimedia terminal characterized by comprising
Memory, for being stored with download control program;
Processor, for executing the downloading rate stored in the memory control program to realize that the claims 1-5 appoints
The step of download control method described in one.
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