CN103260053B - Dynamically adjust the system of multimedia data code rate, media playing apparatus and method - Google Patents
Dynamically adjust the system of multimedia data code rate, media playing apparatus and method Download PDFInfo
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Abstract
The present invention discloses a kind of system, media playing apparatus and the method for dynamic adjustment multimedia data code rate.This dynamically adjusts the method for multimedia data code rate, including: the geographical position being currently located according to a multimedia playing apparatus by a code check adjusting module and a history network speed information, it was predicted that a prediction network speed of above-mentioned multimedia playing apparatus；Adjust a code check by above-mentioned code check adjusting module according to above-mentioned prediction network speed ask and be sent to a multimedia resource servomechanism；Transcoding one multi-medium data is asked according to above-mentioned code check by a transcoding multimedia data module of above-mentioned multimedia resource servomechanism；And the multi-medium data of above-mentioned transcoding is received and plays by above-mentioned multimedia playing apparatus.
Description
Technical field
The present invention relates to a kind of system, media playing apparatus and the method for dynamic adjustment multimedia data code rate, and especially
Relate to a kind of utilize geo-localisation information prediction and dynamically adjust the system of multimedia data code rate, media playing apparatus and
Method.
Background technology
The many definitions being manually set multimedia resource to be play by user of current network multimedia playing device
Or code check, or it is only capable of according to current bandwidth (Bandwidth) situation of residing network from certain several optional code rate level
Carry out the adjustment selecting to realize definition or code check.
But, if selected code check does not mates with bandwidth, then broadcasting multi-medium data picture can be caused the most clear
Or the phenomenon such as picture is blunt.It addition, adjust code check according to the bandwidth conditions that residing network is current to substantially belong to a kind of delayed benefit
The measure rescued, the phenomenon such as certainly will occur in that broadcasting multi-medium data picture is clear not or picture is blunt.
Therefore, how can predict and to adjust code check according to the situation of the bandwidth of network is problem to be solved.
Summary of the invention
The present invention provides a kind of system, media playing apparatus and the method for dynamic adjustment multimedia data code rate.
The present invention proposes the system of a kind of dynamic adjustment multimedia data code rate, including: a multimedia resource servomechanism, one
Multimedia playing apparatus and a code check adjusting module.The most above-mentioned multimedia resource servomechanism includes that a multi-medium data stores mould
Block and a transcoding multimedia data module.Above-mentioned multi-medium data stores module in order to store a multi-medium data.Above-mentioned many matchmakers
Volume data transcoding module couples stores module to above-mentioned multi-medium data, according to a code check request above-mentioned multi-medium data of transcoding.
Above-mentioned multimedia playing apparatus is in order to receive and to play the multi-medium data of above-mentioned transcoding.Above-mentioned code check adjusting module is coupled to
Above-mentioned transcoding multimedia data module, the geographical position being currently located according to above-mentioned multimedia playing apparatus and a history network speed
Information, it was predicted that a prediction network speed of above-mentioned multimedia playing apparatus, and adjust the request of above-mentioned code check also according to above-mentioned prediction network speed
Being sent to above-mentioned transcoding multimedia data module, the most above-mentioned history network speed information is at least one network speed change geographical position and right
Answer at least one history network speed in above-mentioned network speed change geographical position.
The present invention proposes a multimedia playing apparatus, is coupled to a multimedia resource servomechanism, including: a multi-medium data
Buffer module, in order to receive and to keep in the multi-medium data that above-mentioned multimedia resource servomechanism is transmitted；One multimedia
Module, is coupled to above-mentioned multi-medium data buffer module, in order to play above-mentioned multi-medium data；And a code check adjusting module,
Being coupled to above-mentioned multi-medium data buffer module, the geographical position and being currently located according to above-mentioned multimedia playing apparatus is gone through
History network speed information, it was predicted that above-mentioned multimedia playing apparatus one prediction network speed, and according to above-mentioned prediction network speed adjust a code check please
Seek and be sent to above-mentioned multimedia resource servomechanism, the most above-mentioned history network speed information be at least one network speed change geographical position and
At least one history network speed in corresponding above-mentioned network speed change geographical position.
The present invention proposes a kind of method of dynamic adjustment multimedia data code rate, including: depend on by a code check adjusting module
The geographical position being currently located according to a multimedia playing apparatus and a history network speed information, it was predicted that above-mentioned multimedia playing apparatus
One prediction network speed；Adjust a code check by above-mentioned code check adjusting module according to above-mentioned prediction network speed ask and be sent to matchmaker more than
Body resource servomechanism；Turn according to the request of above-mentioned code check by a transcoding multimedia data module of above-mentioned multimedia resource servomechanism
Code one multi-medium data；And the multi-medium data of above-mentioned transcoding is received and plays by above-mentioned multimedia playing apparatus, its
In above-mentioned history network speed information be at least one network speed change geographical position and corresponding above-mentioned network speed change geographical position at least one
History network speed.
For making the above and other objects, features and advantages of the present invention to become apparent, cited below particularly go out preferably to implement
Example, and it is described with reference to the accompanying drawings as follows.
Accompanying drawing explanation
Figure 1A～1B is to show the system dynamically adjusting multimedia data code rate described according to a first embodiment of the present invention
Schematic diagram.
Fig. 2 is the schematic diagram showing the system dynamically adjusting multimedia data code rate described according to a second embodiment of the present invention.
Fig. 3 is to show the method flow diagram dynamically adjusting multimedia data code rate according to described in one embodiment of the invention.
Reference numeral explanation
100 systems
110 multimedia resource servomechanisms
112 multi-medium datas store module
114 transcoding multimedia data modules
116 code check adjusting modules
120 multimedia playing apparatus
122 code check adjusting modules
124 multi-medium data buffer modules
126 multimedia playing module
200 systems
210 multimedia resource servomechanisms
212 multi-medium datas store module
214 transcoding multimedia data modules
220 multimedia playing apparatus
222 code check adjusting modules
228 GPS modules
230 historical information databases
300 method flow diagrams
S302, S304, S306, S308 step
Detailed description of the invention
In order to make the purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and combine
Figure 1A to Fig. 3, is described in detail.Description of the invention provides different embodiments that difference embodiment of the present invention is described
Technical characteristic.Wherein, the configuration of each element in embodiment is for purposes of discussion, and is not used to limit the present invention.And embodiment
The part of middle drawing reference numeral repeats, and is for the purpose of simplifying the description, is not meant as the relatedness between different embodiment.
Figure 1A～1B is to show the system dynamically adjusting multimedia data code rate described according to a first embodiment of the present invention
The schematic diagram of 100.System 100 mainly includes multimedia resource servomechanism 110 and a multimedia playing apparatus 120.
In figure ia, multimedia resource servomechanism 110 mainly includes that a multi-medium data stores module 112 and a multimedia
Transcoded data module 114.Multi-medium data stores module 112 in order to store a multi-medium data.Transcoding multimedia data module
114 are coupled to multi-medium data stores module 112, in order to according to a code check request transcoding multi-medium data.Illustrate in greater detail,
Transcoding multimedia data module 114 first by multi-medium data by multi-medium data store module 112 read after decode, then according to
The request of this code check encodes with the encryption algorithm of a new code check." code check " used herein is a multimedia-data procession
Term." code check " equal to compression before data volume per second divided by compression ratio (the data volume ÷ compression ratio per second before compression), its
Data volume per second before middle compression refers to that frame per second is multiplied by resolution (frame per second × resolution).Illustrating in greater detail, frame per second refers to often
The picture number of second display, it can affect picture fluency, be directly proportional to picture fluency.Frame per second is the biggest, represents that picture is play more
Smooth；Frame per second is the least, represents that picture broadcasting more has sense of beating.Resolution refers to the length and width of (rectangle) picture, i.e. picture
Size.Transcoding multimedia data module 114 can be taken by the parameters such as regulation frame per second therein, resolution and compression ratio to regulate it
Code check during transcoding.Which parameter is the present invention regulate to concrete and be not construed as limiting.
In this embodiment, multimedia resource servomechanism 110 can be the server device of a platform independent job, it is also possible to
It it is a functional module in a multifunctional servo device.For example, multimedia resource servomechanism 110 can be in home entertaining
The NAS servomechanism of the heart or the public servomechanism of similar youtube, those skilled in the art can understand multimedia resource servomechanism
It is not limited to these forms.
Multimedia playing apparatus 120 receives and plays the multimedia number from transcoding multimedia data module 114 transcoding
According to.In one embodiment, multimedia playing apparatus 120 also includes code check adjusting module 122.In this embodiment, multimedia is broadcast
Putting device 120 can be the configurations such as personal computer, mobile computer, tablet PC, intelligent end device, mobile phone, PAD
There is the device of ability to play multi-media.
A geographical position that code check adjusting module 122 is currently located according to multimedia playing apparatus 120 and a history network speed
Information, it was predicted that a prediction network speed of multimedia playing apparatus 120, and adjust code check request according to this prediction network speed, it is resent to
Transcoding multimedia data module 114 in multimedia resource servomechanism 110, by transcoding multimedia data module 114 according to code check
Request goes to encode.The user of multimedia playing apparatus 120 uses the path very great Cheng of multimedia playing apparatus 120 every day
Being similar on degree, such as morning takes public transport or driving, and every day all walks same route, and coming off duty also is one
Sample.And the quality of the network communication signals in certain geographical position is relatively-stationary.Multimedia playing apparatus 120 the most of the present invention
Record the network speed of geographical position when each network speed changes and correspondence as this history network speed information.Make to fill at multimedia
Put and in 120, set up a network status data storehouse based on geographical position, such as when user constantly movement process (as above
Come off duty in way) in use multimedia playing apparatus 120 when playing video, can be in the geographical position arriving next network speed change
Before, the network speed change that precognition will face in advance, pass to multimedia resource servomechanism 110 ditch in advance adjust code check, this
Bright code check adjustable strategies belongs to look-ahead mechanism, adjusts code check again with after entering the geographical position that network condition deteriorates
Mechanism is compared, and the present invention dynamically adjusts the system of multimedia data code rate and can be better protected from the multi-medium data of user and go out
The situation now interrupted, it is ensured that the smooth playing of multi-medium data.Further, since be only used in user to use multimedia playing apparatus
Just need this forecasting mechanism to come the most dynamically when the geographical position of 120 often changes and adjust multimedia data code rate to ensure many matchmakers
The smooth playing of volume data, the most in an embodiment of the present invention, multimedia playing apparatus 120 is provided to user can be made
The selection (as provided respective selection in client software) of energy or this forecasting mechanism of forbidden energy.
It should be noted that in this embodiment, be to be arranged at multimedia playing apparatus 120 with code check adjusting module
Illustrate (code check adjusting module 122 as shown in Figure 1A).In other embodiments, code check adjusting module may also be arranged on many
In media resource servomechanism 110 (code check adjusting module 116 as shown in Figure 1B).
Owing to prediction is likely to occur error, code check adjusting module 122 (or 116) also detects a current network speed, and according to this
Current network speed correction above-mentioned code check request.After current network speed refers to that multimedia playing apparatus 120 is actually reached certain geographical position
The true network speed detected.
In one embodiment, as shown in Figure 1A, multimedia playing apparatus 120 still further comprises a multi-medium data buffering
Module 124 and a multimedia playing module 126.Wherein multi-medium data buffer module 124 is coupled to above-mentioned code check adjusting module
122 and multimedia playing module 126.Multi-medium data buffer module 124 is in order to receive and temporary by transcoding multimedia data mould
Block 114 according to this code check ask produced by the multi-medium data of transcoding.Finally, multimedia playing module 126 plays many matchmakers
The multi-medium data of temporary this transcoding in volume data transcoding module 114.
Wherein, this current network speed can be according to the multimedia number of the transcoding being temporarily stored in multi-medium data buffer module 124
According to decision.Code check adjusting module 122 can set up a preset value upper limit and a preset value lower limit in advance, therefore when being temporarily stored into multimedia
When the multi-medium data of the transcoding in data buffering module 124 is consistently less than this preset value lower limit (network speed is too low), code check
Adjusting module 122 then adjusts and transmits the request of this code check and reduces code rate to transcoding multimedia data module 114 with request.Instead
It, when the multi-medium data of the transcoding being temporarily stored in multi-medium data buffer module 124 is persistently higher than a preset value upper limit
(i.e. network speed is too high), code check adjusting module 122 then adjusts and transmits the request of this code check to transcoding multimedia data module 124 to ask
Seek raising code rate.
Additionally, in another embodiment, code check adjusting module 122 can be tested by network interface and obtain current network speed
Relevant information.For example, code check adjusting module 122 can be sent by test from multimedia playing apparatus 120 or be received
The time of a number of multi-medium data obtain current multimedia playing apparatus 120 and multimedia resource servomechanism 110 it
Between the network speed situation of network.In still another embodiment, multimedia playing apparatus 120 also can be by judging that Information Mobile Service business obtains
Current network speed situation, for example, nationality is global system for mobile telecommunications by differentiating the currently used network of multimedia playing apparatus 120
System (Global System for Mobile Communications, GSM), general packet radio service technology
(General Packet Radio Service, GPRS), enhanced data rates for gsm evolution technology (Enhanced Data
Rates for GSM Evolution, EDGE) or 3G network, thus learn that the network speed of current location is interval, and determine to work as with this
Front network speed.Nationality is revised code check the most in real time by current network speed, can when error occurs in the network speed predicted before (such as
During the network speed generation large change in certain geographical position) in time the code check after adjusting according to prediction network speed is carried out further again
Revise, it is ensured that code check can preferably mate with network speed.
Fig. 2 is to show the system 200 dynamically adjusting multimedia data code rate described according to a second embodiment of the present invention
Schematic diagram.System 200 mainly includes multimedia resource servomechanism 210 and a multimedia playing apparatus 220.Wherein multimedia is broadcast
Put device 220 and also include code check adjusting module 222, GPS module 228 and a historical information database 230.
With the element of same names in first embodiment, its function is not also as it was previously stated, repeat them here.The main difference of Fig. 2 Yu Figure 1A
Different it is that multimedia playing apparatus 220 also includes GPS module 228 and historical information database 230.
GPS module 228 is in order to determine the geographical position at multimedia playing apparatus 220 place.Historical information number
Being coupled to GPS module 228 and code check adjusting module 222 according to storehouse 230, in order to store history network speed information, it is permissible
It is any commercially available for storing up stored device or product, such as hard disk, various memorizer, CD, DVD, computer, servomechanism
In device.Wherein this history network speed information is that at least one network speed changes geographical position and corresponding network speed changes geographical position at least
One history network speed.For example, user may often be passed through some route, seems on and off duty to take the identical traffic route of traveling
The vehicles.Therefore, in route, the information such as the communication signal intensity in some place, situation can't change often.Therefore
The node that network speed change geographical position, such as network speed in the general routes at multimedia playing apparatus 220 place can be changed
Position (such as longitude and latitude), and the history network speed in this network speed corresponding change geographical position records as history network speed information,
When multimedia playing apparatus 220 will pass through identical path, code check adjusting module 222 can be stored according to by inquiry
History network speed information in historical information database 230, it was predicted that the history network speed of this geographical location information corresponding, dynamically to adjust
Code check is asked.In one embodiment, determine in real time via GPS module 228 when multimedia playing apparatus 220
Geographical position spatially close to multiple network speeds change geographical position one of them time, illustrate that network speed will change, then code
Rate adjusting module 222 changes history network speed corresponding to geographical position as this prediction using this network speed in historical information database 230
Network speed.In one embodiment, to search a mapping table (figure do not illustrate) according to this prediction network speed right to find for code check adjusting module 222
The code rate answered is to determine that above-mentioned code check is asked, and is sent to transcoding multimedia data module 214 to adjust its code rate,
It is internal that this mapping table can be stored in code check adjusting module 222.In another embodiment, code check adjusting module 222 is pre-according to this
The code rate of the variation tendency Serial regulation transcoding multimedia data module 214 of survey grid speed.In other embodiments, prediction is worked as
Network speed very slowly and currently network speed is quickly, it is also possible to the capacity of data buffer storage in interim expansion multimedia playing apparatus 220, can be from many
Media resource servomechanism 210 captures more multi-medium data and comes in so that after entering the geographical position that this network speed is slack-off
Even if not adjusting code rate can also maintain the smooth playing of multi-medium data.
As it was previously stated, although the probability occurred is relatively low, the network speed in certain identical geographical position is likely to occur change really,
Causing predicting that network speed may have error, therefore in addition to revise the request of above-mentioned code check in real time according to current network speed, code check is adjusted
This current network speed also can be made comparisons by mould preparation block 222 with corresponding history network speed, when current detected by code check adjusting module 222
When history network speed corresponding to this geographical position that network speed is currently located from this multimedia playing apparatus 220 is different, code check adjusts mould
Block 222 is then updated the action of history network speed information.In one embodiment, code check adjusting module 222 can be by straight for current network speed
Access for history network speed, update and be stored in historical information database 230.In another embodiment, code check adjusting module 222
Can calculate according to a weighted index of the current network speed of correspondence and history network speed and more new historical network speed (such as, history network speed=when
Front network speed × 40%+ history network speed × 60%), then be stored in historical information database 230.
Fig. 3 is to show the method flow diagram dynamically adjusting multimedia data code rate according to described in one embodiment of the invention
300, and coordinate with reference to Figure 1A.First, in step s 302, work as according to a multimedia playing apparatus by a code check adjusting module
One geographical position at front place and a history network speed information, it was predicted that a prediction network speed of above-mentioned multimedia playing apparatus.In step
In S304, adjust a code check by this code check adjusting module according to above-mentioned prediction network speed and ask and be sent to a multimedia resource to watch
Take device.In step S306, by a transcoding multimedia data module of above-mentioned multimedia resource servomechanism according to above-mentioned code check
Request transcoding one multi-medium data.Finally, in step S308, delay by a multi-medium data of above-mentioned multimedia playing apparatus
Die block receives and plays the multi-medium data of above-mentioned transcoding.Although additionally, the probability occurred is relatively low, certain identical geography
The network speed of position is likely to occur change, causes predicting that network speed there may be error, the most in an alternative embodiment of the invention, and Yu Bu
Between rapid S304 and S306, after this multimedia playing apparatus actually reaches this network speed change geographical position, also by this code
Rate adjusting module detects the current network speed of this multimedia playing apparatus, and revise above-mentioned code check in real time according to this current network speed please
Ask, in addition, when current network speed is different from history network speed, also perform to update corresponding history network speed information according to this current network speed
Step.
Therefore, by the system and method dynamically adjusting multimedia data code rate of the present invention, recording geographical position is got final product
Network condition corresponding to information, and be weighted revising with reference to repeatedly current network speed through same geographical position.
When user is in time watching multimedia video, can be before arriving the place of next network speed change, multimedia playing apparatus can
The network speed situation that look-ahead will face, dynamically links up with multimedia resource servomechanism and adjusts code check, to realize preferably
Result of broadcast.Additionally, return to one's native place revised code check the most in real time by current network speed, when error occurs in the network speed predicted before
Time, in time code check can be remake correction further, it is ensured that code check can preferably mate with network speed.
Although the present invention discloses as above with preferred embodiment, so it is not limited to the present invention, the technology of this area
Personnel, under the premise without departing from the spirit and scope of the present invention, can do a little change and retouching, therefore the protection model of the present invention
Enclose is to be as the criterion with the claim of the present invention.
Claims (10)
1. a system for dynamic adjustment multimedia data code rate, including:
One multimedia resource servomechanism, including:
One multi-medium data stores module, in order to store a multi-medium data；And
One transcoding multimedia data module, is coupled to above-mentioned multi-medium data and stores module, above-mentioned according to a code check request transcoding
Multi-medium data；
One multimedia playing apparatus, in order to receive and to play the multi-medium data of above-mentioned transcoding；And
One code check adjusting module, is coupled to above-mentioned transcoding multimedia data module, according to the current institute of above-mentioned multimedia playing apparatus
A geographical position and a history network speed information, it was predicted that a prediction network speed of above-mentioned multimedia playing apparatus, and according to above-mentioned
Prediction network speed adjusts above-mentioned code check and asks and be sent to above-mentioned transcoding multimedia data module,
The most above-mentioned history network speed information is at least one network speed change geographical position and corresponding above-mentioned network speed change geographical position
At least one history network speed, wherein when this geographical position at above-mentioned multimedia playing apparatus place is close to above-mentioned at least one network speed change
For the moment, above-mentioned code check adjusting module changes history network speed corresponding to geographical position as this pre-survey grid using this network speed in geographical position
Speed.
2. the system dynamically adjusting multimedia data code rate as claimed in claim 1, the most above-mentioned code check adjusting module is also examined
Survey a current network speed, ask further according to this current above-mentioned code check of network speed correction.
3. the system dynamically adjusting multimedia data code rate as claimed in claim 2, the most above-mentioned multimedia playing apparatus is also
Including:
One multi-medium data buffer module, is coupled to above-mentioned code check adjusting module, many in order to receive and to keep in above-mentioned transcoding
Media data；And
One multimedia playing module, is coupled to above-mentioned multi-medium data buffer module, in order to play above-mentioned temporary transcoding
Multi-medium data,
The most above-mentioned current network speed is the multimedia according to the above-mentioned transcoding being temporarily stored in above-mentioned multi-medium data buffer module
Data determine；
When the multi-medium data of the above-mentioned transcoding being temporarily stored in above-mentioned multi-medium data buffer module is consistently less than a preset value
During lower limit, above-mentioned code check adjusting module then adjusts and transmits the request of above-mentioned code check to above-mentioned transcoding multimedia data module with request
Reduce a code rate；And
When the multi-medium data of the above-mentioned transcoding being temporarily stored in above-mentioned multi-medium data buffer module is persistently higher than a preset value
During the upper limit, above-mentioned code check adjusting module then adjusts and transmits the request of above-mentioned code check to above-mentioned transcoding multimedia data module with request
Improve above-mentioned code rate.
4. the system dynamically adjusting multimedia data code rate as claimed in claim 1, above-mentioned multimedia playing apparatus also includes:
One GPS module, in order to determine the above-mentioned geographical position at above-mentioned multimedia playing apparatus place；And
One historical information database, is coupled to above-mentioned GPS module and above-mentioned code check adjusting module, on storing
State history network speed information.
5. the system dynamically adjusting multimedia data code rate as claimed in claim 4, the most above-mentioned code check adjusting module is also examined
Survey a current network speed, when above-mentioned corresponding with this geographical position that above-mentioned multimedia playing apparatus is currently located of above-mentioned current network speed
During history network speed difference, above-mentioned code check adjusting module updates above-mentioned history network speed information according to above-mentioned current network speed, and is stored in
Above-mentioned historical information database.
6. the as claimed in claim 5 system dynamically adjusting multimedia data code rate, the most above-mentioned code check adjusting module according to
One weighted index of corresponding above-mentioned current network speed and above-mentioned history network speed calculates and updates above-mentioned history network speed information, is stored in
State historical information database.
7. the system dynamically adjusting multimedia data code rate as claimed in claim 1, the most above-mentioned code check adjusting module foundation
This prediction network speed searches a mapping table to determine the request of above-mentioned code check.
8. a multimedia playing apparatus, is coupled to a multimedia resource servomechanism, including:
One multi-medium data buffer module, in order to receive and to keep in the multimedia number that above-mentioned multimedia resource servomechanism is transmitted
According to；
One multimedia playing module, is coupled to above-mentioned multi-medium data buffer module, in order to play above-mentioned multi-medium data；And
One code check adjusting module, is coupled to above-mentioned multi-medium data buffer module, according to the current institute of above-mentioned multimedia playing apparatus
A geographical position and a history network speed information, it was predicted that a prediction network speed of above-mentioned multimedia playing apparatus, and according to above-mentioned
Prediction network speed adjusts a code check asks and is sent to above-mentioned multimedia resource servomechanism,
The most above-mentioned history network speed information is at least one network speed change geographical position and corresponding above-mentioned network speed change geographical position
At least one history network speed,
Wherein when above-mentioned multimedia playing apparatus place this geographical position close to above-mentioned at least one network speed change geographical position it
For the moment, the history network speed that above-mentioned code check adjusting module is corresponding using this network speed change geographical position is as this prediction network speed.
9. multimedia playing apparatus as claimed in claim 8, also includes:
One GPS module, in order to determine this geographical position at above-mentioned multimedia playing apparatus place；And
One historical information database, is coupled to above-mentioned GPS module and above-mentioned code check adjusting module, on storing
State history network speed information.
10. a method for dynamic adjustment multimedia data code rate, including:
The geographical position being currently located according to a multimedia playing apparatus by a code check adjusting module and history network speed letter
Breath, it was predicted that a prediction network speed of above-mentioned multimedia playing apparatus；
Adjust a code check by above-mentioned code check adjusting module according to above-mentioned prediction network speed to ask and be sent to a multimedia resource to watch
Take device；
Transcoding matchmaker more than is asked according to above-mentioned code check by a transcoding multimedia data module of above-mentioned multimedia resource servomechanism
Volume data；And
The multi-medium data of above-mentioned transcoding is received and plays by above-mentioned multimedia playing apparatus,
The most above-mentioned history network speed information is at least one network speed change geographical position and corresponding above-mentioned network speed change geographical position
At least one history network speed,
Wherein when above-mentioned multimedia playing apparatus place this geographical position close to above-mentioned at least one network speed change geographical position it
For the moment, the history network speed that above-mentioned code check adjusting module is corresponding using this network speed change geographical position is as this prediction network speed.
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