CN104104685B - A kind of picture retransmission method and device - Google Patents
A kind of picture retransmission method and device Download PDFInfo
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- CN104104685B CN104104685B CN201410354428.6A CN201410354428A CN104104685B CN 104104685 B CN104104685 B CN 104104685B CN 201410354428 A CN201410354428 A CN 201410354428A CN 104104685 B CN104104685 B CN 104104685B
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Abstract
The invention discloses a kind of picture retransmission method and device.Methods described includes：Obtain current network flow value；Obtain online presentation device list；According to the current network flow value and online presentation device list determine instruction quantity forwarded N；N number of online presentation device into the online presentation device list sends picture download instruction every time, and the picture download instruction is used to indicate the online presentation device download pictures for receiving the picture download instruction.In the present embodiment, according to current network flow value and online presentation device list determine instruction quantity forwarded N, N number of online presentation device into the online presentation device list sends picture download instruction every time, the transmission of picture download instruction and the download of online presentation device picture can be adjusted based on preceding network flow value dynamic, network congestion is avoided the occurrence of so as to improve the reliability of picture forwarding, and improves the speed of picture forwarding.
Description
Technical field
The present invention relates to multimedia interactive technical field, more particularly to a kind of picture retransmission method and device.
Background technology
In teaching and exhibition, it usually needs shared as presentation device carries out picture presentation and forwarding, by taking teaching as an example, always
Teaching notes are generally uploaded to service controller, service controller is by handling these teaching notes by teacher when being given lessons or lecture
Plurality of pictures is converted into, teacher often slides the pictures on demonstration equipment, and the presentation device of student is also by the instruction sent
This pictures is downloaded on service controller and is shown, so as to student can be watched using presentation device this pictures,
Answer is carried out on this pictures, is write, teacher can also be returned to by service controller, be reviewed for teacher.
But this method, because presentation device quantity is more, when sliding the next pictures of display, all displayings are set teacher
Standby Connection Service controller together downloads this pictures, can not be controlled and adjust according to network traffics, so as to easily cause
The problems such as momentary network obstruction, a large amount of packet losses are retried, picture is downloaded slowly, and network effective rate of utilization declines.
The content of the invention
The embodiment of the present invention provides a kind of picture retransmission method and device, is carried out for being forwarded according to network traffics to picture
Control, ensure the normal forwarding of picture, improve picture forwarding speed.
The present invention provides a kind of picture retransmission method, for control device, comprises the following steps：
Obtain current network flow value；
Obtain online presentation device list；
According to the current network flow value and online presentation device list determine instruction quantity forwarded N；
N number of online presentation device into the online presentation device list sends picture download instruction, the figure every time
Piece download instruction is used to indicate the online presentation device download pictures for receiving the picture download instruction.
It is preferably, described according to the current network flow value and online presentation device list determine instruction quantity forwarded,
Including：
By current network flow value compared with default network traffics threshold value；
When the current network flow value is less than network traffics threshold value, according to the current network flow value and online exhibition
Show list of devices determine instruction quantity forwarded N.
Preferably, before the acquisition current network flow value, methods described also includes：
Receive the picture recognition information that demonstration equipment is sent.
Preferably, the acquisition current network flow value, including：
Time interval is obtained according to default flow and obtains the current network flow value.
Preferably, it is described to send picture download instruction to N number of online presentation device every time, including：
Picture download instruction is sent according to online presentation device listing arrangement order to N number of online presentation device every time.
The present invention also provides a kind of picture retransmission method, for online presentation device, comprises the following steps：
Obtain the picture recognition information that demonstration equipment is sent；
Receive the picture download instruction that control device is sent；
Download picture corresponding to the picture recognition information；
By the image cache of download to local.
Preferably, picture corresponding to the download picture recognition information, including：
Obtain the pictorial information list of photo current packet；
Picture is set to download number L, wherein L is the integer more than 0；
L pictures are downloaded according to the pictorial information list.
Preferably, the picture recognition information for obtaining demonstration equipment and sending, including：
When L pictures, which are downloaded, to be completed, the picture recognition information that demonstration equipment is sent is obtained.
Preferably, methods described also includes：
During picture corresponding to the picture recognition information is downloaded, another picture that demonstration equipment is sent is received
During identification information, picture corresponding to the stopping download picture recognition information, start to download another picture recognition information pair
The picture answered.
The present invention also provides a kind of picture retransmission unit, and described device includes：
Flow acquisition module, for obtaining current network flow value；
List of devices acquisition module, for obtaining online presentation device list；
Quantity forwarded determining module, for according to the current network flow value and online presentation device list determine instruction
Quantity forwarded N；
Instruction sending module, figure is sent for N number of online presentation device every time into the online presentation device list
Piece download instruction, the picture download instruction are used to indicate the online presentation device download figure for receiving the picture download instruction
Piece.
Preferably, the quantity forwarded determining module includes：
Threshold value comparing unit, for by current network flow value compared with default network traffics threshold value；
Determining unit, for when the current network flow value is less than network traffics threshold value, according to the current network
Flow value and online presentation device list determine instruction quantity forwarded N.
Preferably, described device also includes：
Identification information receiving module, the picture recognition information sent for receiving demonstration equipment.
Preferably, the flow acquisition module includes：
Flow acquiring unit, the current network flow value is obtained for obtaining time interval according to default flow.
Preferably, the instruction sending module includes：
Instruction sending unit, for being sent out every time to N number of online presentation device according to online presentation device listing arrangement order
Send picture download instruction.
The present invention also provides a kind of picture retransmission unit, and described device includes：
Identification information acquisition module, the picture recognition information sent for obtaining demonstration equipment；
Download instruction receiving module, the picture download instruction sent for receiving control device；
First picture download module, for downloading picture corresponding to the picture recognition information；
Image cache module, for by the image cache of download to local.
Preferably, the first picture download module includes：
Information list acquiring unit, for obtaining the pictorial information list of photo current packet；
Number setting unit is downloaded, for setting picture to download number L, wherein L is the integer more than 0；
Picture download unit, for downloading L pictures according to the pictorial information list.
The identification information acquisition module includes：
Discrimination information acquisition unit, for when the L pictures download completion, obtaining the picture that demonstration equipment is sent
Identification information.
Preferably, described device also includes：
Second picture download module, for during picture corresponding to the picture recognition information is downloaded, receiving
During another picture recognition information that demonstration equipment is sent, picture corresponding to the stopping download picture recognition information, start to download
Picture corresponding to another picture recognition information.
In the present embodiment, instruction quantity forwarded N is set according to current network flow value and online presentation device list, every time
Picture download instruction is sent to N number of online presentation device, can be based on preceding network flow value dynamic adjustment picture download instruction
The download with online presentation device picture is sent, avoids the occurrence of network congestion so as to improve the reliability of picture forwarding, and improve
The speed of picture forwarding.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart of picture retransmission method of the embodiment of the present invention；
Fig. 2 is another flow chart of picture retransmission method of the embodiment of the present invention；
Fig. 3 is the structure chart of picture retransmission unit of the embodiment of the present invention；
Fig. 4 is another structure chart of picture retransmission unit of the embodiment of the present invention；
Fig. 5 is the structure chart of picture repeater system of the embodiment of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
The system that the picture retransmission method of the present invention uses includes demonstration equipment, control device and presentation device, and demonstration is set
Operation and control are ready for use on, picture recognition information is sent to control device, control device is used to forward picture recognition information
It is used for what is sent according to control device to presentation device, and according to control of network flow quantity presentation device download pictures, presentation device
Instruct download pictures.
Referring to the flow chart that Fig. 1 is picture retransmission method of the embodiment of the present invention, picture retransmission method is used in control device,
This method includes：
Step 101：Obtain current network flow value.
Wherein, current network flow value can be the current network flow value or whole system of control device
Current network flow value.Control device can pre-set flow and obtain time interval, such as time interval is arranged to 1 second can
Or 1 minute etc., time interval is obtained according to flow and obtains current network flow value.
Step 102：Obtain online presentation device list.
Wherein, the identification marking of whole presentation devices is included in online presentation device list.
Step 103：According to current network flow value and online presentation device list determine instruction quantity forwarded N.Wherein, N
For the integer more than or equal to 0.
Wherein, current network residual stream value is determined according to current network flow value in control device, obtains one
The flow value of individual presentation device download pictures, by current network residual stream value divided by a presentation device
The flow of download pictures is worth to instruction quantity forwarded N, and instruction quantity forwarded N can be with current net
Network flow value increases and reduced.
Network traffics threshold value can be pre-set.
Wherein, network traffics threshold value is related to the hardware and network condition of control device, and those skilled in the art can root
It is configured according to needs.
By current network flow value compared with default network traffics threshold value.
When current network flow value is less than network traffics threshold value, arranged according to current network flow value and online presentation device
Table determine instruction quantity forwarded N；When current network flow value is more than or equal to network traffics threshold value, picture download is not sent and is referred to
Order.
Step 104：N number of online presentation device into online presentation device list sends picture download instruction, figure every time
Piece download instruction is used to indicate the online presentation device download pictures for receiving picture download instruction.
Wherein it is possible to sent every time to N number of online presentation device under picture according to online presentation device listing arrangement order
Instruction is carried, for example, being shown online to the 1st to n-th for the first time comprising 3N online presentation devices in online presentation device list
Equipment sends picture download instruction, and second to N+1 to 2N, an online presentation device sends picture download instruction, third time
To 2N+1 to 3N, an online presentation device sends picture download instruction.
Before obtaining current network flow value, method may also include：
Receive the picture recognition information that demonstration equipment is sent.
Wherein, control device after the picture recognition information that sends of demonstration equipment is received according to current network flow value control
Presentation device download pictures processed.
In the present embodiment, instruction quantity forwarded N is set according to current network flow value and online presentation device list, every time
Picture download instruction is sent to N number of online presentation device, can be based on preceding network flow value dynamic adjustment picture download instruction
The download with online presentation device picture is sent, avoids the occurrence of network congestion so as to improve the reliability of picture forwarding, and improve
The speed of picture forwarding.
Referring to the flow chart that Fig. 2 is picture retransmission method of the embodiment of the present invention, picture retransmission method is used in presentation device,
This method includes：
Step 201：Obtain the picture recognition information that demonstration equipment is sent.
Picture recognition information be pictorial information bag in picture identification information, pictorial information bag by demonstration equipment operator
Member is selected, and demonstration equipment sends pictorial information bag identification information to presentation device by control device and picture recognition is believed
Breath, presentation device identify picture according to picture recognition information, and picture recognition information can be Image ID.
Step 202：Receive the picture download instruction that control device is sent.
Step 203：Picture corresponding to download pictures identification information.
Wherein, presentation device can obtain the pictorial information list of photo current packet, set picture to download number L, its
Middle L is the integer more than 0, and L pictures are downloaded according to pictorial information list.
Presentation device can obtain the picture recognition information that demonstration equipment is sent when L pictures download completion.
Step 204：By the image cache of download to local.
In the present embodiment, presentation device is downloaded after picture download instruction is received to picture, and is cached to local, without again
Secondary connection control device is downloaded, and is facilitated presentation device to be called, is reduced the consumption of Internet resources, so as to effectively avoid
Network congestion phenomenon.
This method also includes：
During picture corresponding to download pictures identification information, another picture recognition letter that demonstration equipment is sent is received
During breath, picture corresponding to stopping download pictures identification information, start to download picture corresponding to another picture recognition information.
In the present embodiment, the downloading task before stopping after the picture recognition information that reception demonstration equipment is sent, and even
Connect picture corresponding to control device download pictures identification information so that user can obtain newest turn according to demonstration equipment all the time
Picture is sent out, so as to reach synchronous with demonstration equipment, the synchronism of picture forwarding is improved, avoids insignificant picture from downloading.
It is a kind of structure chart of picture retransmission unit of the embodiment of the present invention referring to Fig. 3, device includes：
Flow acquisition module 301, for obtaining current network flow value.
List of devices acquisition module 302, for obtaining online presentation device list.
Quantity forwarded setup module 303, for according to current network flow value and online presentation device list determine instruction
Quantity forwarded N, wherein, N is the integer more than or equal to 0.
Instruction sending module 304, picture is sent for N number of online presentation device every time into online presentation device list
Download instruction, picture download instruction are used to indicate the online presentation device download pictures for receiving picture download instruction.
Preferably, quantity forwarded setup module includes：
Threshold value comparison module, for by current network flow value compared with default network traffics threshold value；
Judge module, for when current network flow value is less than network traffics threshold value, according to current network flow value and
Online presentation device list determine instruction quantity forwarded N.
Preferably, device also includes：
Identification information receiving module, the picture recognition information sent for receiving demonstration equipment.
Preferably, flow acquisition module includes：
Flow acquiring unit, current network flow value is obtained for obtaining time interval according to default flow.
Preferably, instruction sending module includes：
Instruction sending unit, for being sent out every time to N number of online presentation device according to online presentation device listing arrangement order
Send picture download instruction.
It is a kind of structure chart of picture retransmission unit of the embodiment of the present invention referring to Fig. 4, device includes：
Identification information acquisition module 401, the picture recognition information sent for obtaining demonstration equipment.
Download instruction receiving module 402, the picture download instruction sent for receiving control device.
First picture download module 403, picture corresponding to download pictures identification information；
Image cache module 404, for by the image cache of download to local.
Preferably, the first picture download module includes：
Information list acquiring unit, for obtaining the pictorial information list of photo current packet；
Number setting unit is downloaded, for setting picture to download number L, wherein L is the integer more than 0；
Picture download unit, for downloading L pictures according to pictorial information list.
Preferably, identification information acquisition module includes：
Discrimination information acquisition unit, for when L pictures download completion, obtaining the picture recognition that demonstration equipment is sent
Information.
Preferably, device also includes：
Second picture download module, for during picture corresponding to download pictures identification information, receiving demonstration
During another picture recognition information that equipment is sent, picture corresponding to stopping download pictures identification information, start to download another picture
Picture corresponding to identification information.
It should be noted that：When the picture retransmission unit that above-described embodiment provides states function in realization, only with above-mentioned work(
Can module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different functions
Module is completed, i.e., the internal structure of equipment is divided into different functional modules, described above all or part of to complete
Function.In addition, the picture retransmission unit that above-described embodiment provides belongs to same design with picture retransmission method embodiment, its is specific
Implementation process refers to embodiment of the method, repeats no more here.
Referring to the structure chart that Fig. 5 is picture repeater system of the embodiment of the present invention, as illustrated, picture repeater system includes：
Demonstration equipment 501, control device 502 and presentation device 503, control device 502 include picture servers 504, turned
Device 505 and traffic manager 506 are sent out, wherein demonstration equipment 501 and presentation device 503 can be one or more, demonstration equipment
501st, it is attached between control device 502 and presentation device 503 by wired or wireless.
In use, teacher selects a pictorial information bag using demonstration equipment 501, from the figure of control device 502
Image ID list in the download pictures packet of piece server 504, demonstration equipment 501 are sent out to the transponder 505 of control device 502
Pictorial information bag is sent to instruct, the instruction of pictorial information bag is transmitted to all presentation devices 503 by transponder 505, and pictorial information bag refers to
Pictorial information bag name and pictorial information bag identification information etc. are included in order.After presentation device 503 receives the instruction of pictorial information bag,
The name of bag containing pictorial information and pictorial information bag identification information in being instructed according to pictorial information bag are from the picture of control device 502
Image ID list in the download pictures packet of server 504.
The picture of pictorial information bag is downloaded and shown by demonstration equipment 501, while to the transponder of control device 502
505 send corresponding first idsplay order, and the ID of the picture is contained in the first idsplay order.The transponder of control device 502
505 change the first idsplay order to presentation device 503, and similarly demonstration equipment 501 is every time from the photo services of control device 502
Device 504 downloads the picture and the ID of the picture can be all sent to the transponder 505 of control device 502, then middle control after showing
The transponder 505 of equipment 502 is transmitted to presentation device 503.
The monitoring traffic in network value of flow controller 506 of control device 502, when current network flow value is less than network traffics
During threshold value, instruction quantity forwarded N is set according to current network flow value and online presentation device list, every time to N number of online exhibition
Show that equipment sends picture download instruction.
After presentation device 503 receives picture download instruction, picture letter is obtained from the picture servers 504 of control device 502
Image ID list in breath bag, pictures caching is downloaded from the picture servers 504 of control device 502 according to the order of picture
To local, the picture download instruction received after being not responding to if a picture download instruction is received again by downloading process, when
Picture download instruction is received after download again, then continues to download a pictures next in sequence, in this equipment will wrap
All pictures are all cached to local.
Presentation device 503 is downloaded from the picture servers 504 of control device 502 immediately after can also receiving the ID of the picture
The figure is simultaneously shown, download is canceled if other pictures are now downloaded, and responds the operation of demonstration equipment 501.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The shape for the computer program product that usable storage medium is implemented on (including but is not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (14)
- A kind of 1. picture retransmission method, for control device, it is characterised in that comprise the following steps：Obtain current network flow value；Obtain online presentation device list；According to the current network flow value and online presentation device list determine instruction quantity forwarded N；N number of online presentation device into the online presentation device list sends picture download instruction every time, under the picture Instruction is carried to be used to indicate the online presentation device download pictures for receiving the picture download instruction；It is described according to the current network flow value and online presentation device list determine instruction quantity forwarded, including：By current network flow value compared with default network traffics threshold value；When the current network flow value is less than network traffics threshold value, set according to the current network flow value and online displaying Standby list determine instruction quantity forwarded N.
- 2. the method as described in claim 1, it is characterised in that before the acquisition current network flow value, methods described is also Including：Receive the picture recognition information that demonstration equipment is sent.
- 3. the method as described in claim 1, it is characterised in that the acquisition current network flow value, including：Time interval is obtained according to default flow and obtains the current network flow value.
- 4. the method as described in claim 1, it is characterised in that described to send picture download to N number of online presentation device every time Instruction, including：Picture download instruction is sent according to online presentation device listing arrangement order to N number of online presentation device every time.
- A kind of 5. picture retransmission method, for online presentation device, it is characterised in that comprise the following steps：Obtain the picture recognition information that demonstration equipment is sent；Receive the picture download instruction that control device is sent；Download picture corresponding to the picture recognition information；By the image cache of download to local；Methods described also includes：During picture corresponding to the picture recognition information is downloaded, another picture recognition that demonstration equipment is sent is received During information, picture corresponding to the stopping download picture recognition information, start to download corresponding to another picture recognition information Picture；When carrying out picture forwarding, the control device is additionally operable to：Obtain current network flow value；Obtain online presentation device list；According to the current network flow value and online presentation device list determine instruction quantity forwarded N；N number of online presentation device into the online presentation device list sends picture download instruction every time, under the picture Instruction is carried to be used to indicate the online presentation device download pictures for receiving the picture download instruction.
- 6. method as claimed in claim 5, it is characterised in that described to download picture corresponding to the picture recognition information, bag Include：Obtain the pictorial information list of photo current packet；Picture is set to download number L, wherein L is the integer more than 0；L pictures are downloaded according to the pictorial information list.
- 7. method as claimed in claim 6, it is characterised in that the picture recognition information for obtaining demonstration equipment and sending, Including：When L pictures, which are downloaded, to be completed, the picture recognition information that demonstration equipment is sent is obtained.
- 8. a kind of picture retransmission unit, it is characterised in that described device includes：Flow acquisition module, for obtaining current network flow value；List of devices acquisition module, for obtaining online presentation device list；Quantity forwarded determining module, for according to the current network flow value and the transmission of online presentation device list determine instruction Quantity N；Instruction sending module, sent for N number of online presentation device every time into the online presentation device list under picture Instruction is carried, the picture download instruction is used to indicate the online presentation device download pictures for receiving the picture download instruction；The quantity forwarded determining module includes：Threshold value comparing unit, for by current network flow value compared with default network traffics threshold value；Determining unit, for when the current network flow value is less than network traffics threshold value, according to the current network flow Value and online presentation device list determine instruction quantity forwarded N.
- 9. picture retransmission unit as claimed in claim 8, it is characterised in that described device also includes：Identification information receiving module, the picture recognition information sent for receiving demonstration equipment.
- 10. picture retransmission unit as claimed in claim 8, it is characterised in that the flow acquisition module includes：Flow acquiring unit, the current network flow value is obtained for obtaining time interval according to default flow.
- 11. picture retransmission unit as claimed in claim 8, it is characterised in that the instruction sending module includes：Instruction sending unit, for sending figure to N number of online presentation device every time according to online presentation device listing arrangement order Piece download instruction.
- 12. a kind of picture retransmission unit, it is characterised in that described device includes：Identification information acquisition module, the picture recognition information sent for obtaining demonstration equipment；Download instruction receiving module, the picture download instruction sent for receiving control device；First picture download module, for downloading picture corresponding to the picture recognition information；Image cache module, for by the image cache of download to local；Described device also includes：Second picture download module, for during picture corresponding to the picture recognition information is downloaded, receiving demonstration During another picture recognition information that equipment is sent, picture corresponding to the stopping download picture recognition information, start described in download Picture corresponding to another picture recognition information；When carrying out picture forwarding, the control device is additionally operable to：Obtain current network flow value；Obtain online presentation device list；According to the current network flow value and online presentation device list determine instruction quantity forwarded N；N number of online presentation device into the online presentation device list sends picture download instruction every time, under the picture Instruction is carried to be used to indicate the online presentation device download pictures for receiving the picture download instruction.
- 13. picture retransmission unit as claimed in claim 12, it is characterised in that the first picture download module includes：Information list acquiring unit, for obtaining the pictorial information list of photo current packet；Number setting unit is downloaded, for setting picture to download number L, wherein L is the integer more than 0；Picture download unit, for downloading L pictures according to the pictorial information list.
- 14. picture retransmission unit as claimed in claim 13, it is characterised in that the identification information acquisition module includes：Discrimination information acquisition unit, for when the L pictures download completion, obtaining the picture recognition that demonstration equipment is sent Information.
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| CN103514771A (en) * | 2012-06-26 | 2014-01-15 | 黄庆凯 | Personal hand-held terminal networking-based classroom teaching communication network system |
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