CN103475908A - Multi-screen synchronization play method and device - Google Patents
Multi-screen synchronization play method and device Download PDFInfo
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- CN103475908A CN103475908A CN2013103110973A CN201310311097A CN103475908A CN 103475908 A CN103475908 A CN 103475908A CN 2013103110973 A CN2013103110973 A CN 2013103110973A CN 201310311097 A CN201310311097 A CN 201310311097A CN 103475908 A CN103475908 A CN 103475908A
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Abstract
The embodiment of the invention discloses a multi-screen synchronization play method and device and belongs to the field of network communication. The method includes: sending a synchronization-request instruction to all of play controllers in a network after any of the play controller is started; if no synchronization server is available in the network, selecting a main play controller as the synchronization server from the play controllers; the synchronization server sending broadcast every one period and the rest reception play controllers receiving the broadcast; comparing information in the received broadcast with a broadcast state and sending the synchronization request instruction to the synchronization server if synchronization is needed; and the synchronization server sending the synchronization instruction to the broadcast controllers for synchronization operation. The multi-screen synchronization play device controls the play controllers in the network for multi-screen synchronization play and any play controller carries out synchronization operation as the synchronization server so that a synchronization display process with high reliability is provided, that is, any one display terminal is used as a control server, once the terminal has a problem, another terminal is used as the synchronization server at once.
Description
Technical field
The present invention relates to network communication field, relate in particular to the method and apparatus that a kind of multi-screen synchronous is play.
Background technology
The development of scientific and technological information has promoted the progress of video technique, and the screen display of video is widely used the every field such as advertisement out of doors, public transport, promotional display.Some occasion needs a plurality of display screens to carry out the video demonstration of same picture simultaneously, for example, and the video playback of a plurality of display terminals of different azimuth angle in show room.Multi-screen shows that a most important technology is exactly that needs keep the audio video synchronization of a plurality of pictures to play.
The usual way of audio video synchronization is to utilize distributor or split screen device to realize the audio video synchronization broadcasting of a plurality of display terminals.Video distributor or split screen device are a kind of equipment that a video signal source average mark is made into to multi-channel video signal, the corresponding total monitor of a road vision signal or player.Because parallel video signal decay is larger, to give after a plurality of outlet terminals due to reasons such as impedance mismatchs, image can serious distortion, and circuit is also unstable.Video distributor is except impedance matching, also has video gain, makes vision signal can give a plurality of output equipments and unaffected simultaneously.By using distributor or split screen device, owing to having increased ancillary hardware, make the cost of system increase.In addition, adopt distributor or split screen device to be subject to the restriction of distance, its effective propagation path is greatly about 50 meters left and right, and when distance increases, signal transmission is of low quality, and the broadcasting pictures on terminal there will be the flakes noise.
In addition, also having a kind of method is will be that video file is issued to each playback terminal by the Web broadcast mode, when webserver playing video file, playing progress rate information is sent to each playback terminal; Each playback terminal, according to the video file and the playing progress rate information that receive, is aligned on local screen the synchronous broadcasting of carrying out video file by location.Server controls more complicated in the method, and the pressure born is very large, and if server goes wrong, all display terminals possibly can't be realized Synchronization Control, cause poor reliability.
Summary of the invention
The method and apparatus that embodiments of the invention provide a kind of multi-screen synchronous to play, solve between each display terminal and can not carry out safely and reliably the problem of Synchronization Control.
For achieving the above object, adopt following technical scheme:
A kind of method that multi-screen synchronous is play, realize by following steps:
After arbitrary Broadcast Control device in network starts, send request synchronous instruction to all Broadcast Control devices on network; Each described Broadcast Control device waits for that synchronization server sends synchronic command and carries out synchronously;
If there is no synchronization server in network, the Broadcast Control device in network, select a main broadcaster and control device as synchronization server;
Synchronization server sends broadcast every one-period, and all the other receive the Broadcast Control device and receive broadcast;
From player, the information the broadcast received and the broadcast state of self are compared, as need synchronously send request synchronic command to synchronization server;
Synchronization server sends synchronic command and carries out simultaneous operation to the Broadcast Control device.
Preferably, after the arbitrary Broadcast Control device in network starts, set up respectively one and wait for synchronous and send request the thread of synchronic command, wait in synchronous send request synchronous instruction to network on all Broadcast Control devices, thereby synchronous to other Broadcast Control device requests.
Preferably, described method also comprises, competes out a Broadcast Control device according to the competition mechanism of setting from the Broadcast Control device at net and serves as synchronization server.If, and an abnormal rear system of Broadcast Control device of serving as synchronization server also can re-start competition, produce a new synchronization server.
Preferably, when selecting a main broadcaster the Broadcast Control device in network and controlling device as synchronization server, if due to the reason such as part suspension etc. is abnormal, caused in network having occurred that two main broadcasters control device, these two main broadcasters are controlled device and can be at war with according to sending number of broadcast times, send the more Broadcast Control device of number of broadcast times and continue to keep the main broadcaster to control device, another Broadcast Control device is converted to common Broadcast Control device.
Further, described main broadcaster is controlled device and is sent synch command to all Broadcast Control devices as synchronization server, all the other Broadcast Control devices exit the competition main broadcaster controls the process of device, and sets up respectively two threads: for the thread to synchronization server transmission broadcast with for receive the thread of broadcast for the Broadcast Control device.
Whether preferably, comprise the sender who sends broadcast in described broadcast is that the main broadcaster is controlled device, sent number of broadcast times information, the ip address of Broadcast Control device itself, the broadcast information of current displaying video.
Further, described broadcast information comprises the broadcasting list of current broadcasting, the program in progress broadcasting list, the playing progress rate of program.
Preferably, when described player compares the information in the broadcast received and the broadcast state of self, if it is different that self current broadcast information and the main broadcaster who receives are controlled the broadcast information that device sends, by the Broadcast Control device, current broadcast information changes the program that the main broadcaster is controlled the current broadcasting of device into, directly jumps to the main broadcaster according to the broadcast information in broadcast and controls the progress of device and play.
Further, identical if the current broadcast information of other Broadcast Control devices in network and the main broadcaster who receives are controlled the broadcast information that device sends, and in both broadcast information, corresponding playing progress rate, in deviation threshold, is not adjusted the broadcast information of Broadcast Control device.
Further, if the current broadcast information of other Broadcast Control devices in network is controlled playing progress rate corresponding in the broadcast information of device transmission with the main broadcaster who receives and is greater than deviation threshold, this Broadcast Control device sends request synch command and controls device to the main broadcaster, and the broadcast information of main broadcaster in broadcast being controlled to device is synchronized in current Broadcast Control device.
The device that a kind of multi-screen synchronous is play comprises as lower module:
Start module, after the arbitrary Broadcast Control device startup for network, send request synchronous instruction to all Broadcast Control devices on network; Each described Broadcast Control device waits for that synchronization server sends synchronic command and carries out synchronously;
The competition module, if there is no synchronization server for network, select a main broadcaster and control device as synchronization server the Broadcast Control device in network;
Sending module, send broadcast for synchronization server every one-period, and all the other receive the Broadcast Control device and receive broadcast;
Comparison module, for from player, the information of the broadcast that receives and the broadcast state of self being compared, as need synchronously send request synchronic command to synchronization server;
Synchronization module, send synchronic command for synchronization server and carry out simultaneous operation to the Broadcast Control device.
The method and apparatus that a kind of multi-screen synchronous of the present invention is play, controlling by the main broadcaster as synchronization server current broadcast state corresponding to current broadcast state and other Broadcast Control devices self that device is corresponding compares, as asynchronous as both, the broadcast state of according to the main broadcaster, controlling device is synchronously adjusted corresponding Broadcast Control device, thereby each Broadcast Control device of controlling in network carries out the multi-screen synchronous broadcasting; And arbitrarily the Broadcast Control device can be used as synchronization server and carries out simultaneous operation, for case study on implementation provides a simultaneous display process that reliability is strong, can make Control Server by any one display terminal, once this terminal goes wrong, can serve as synchronization server by other-end immediately.
The accompanying drawing explanation
The method flow diagram that Fig. 1 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides;
In the method that Fig. 2 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides, the main broadcaster is controlled the schematic diagram of device competition;
In the method that Fig. 3 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides, the main broadcaster is controlled the schematic diagram that device sends broadcast;
In the method that Fig. 4 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides, all the other Broadcast Control devices receive the schematic diagram of synchronization message;
The schematic diagram that in the method that Fig. 5 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides, the synchronizing information of all the other Broadcast Control devices and synchronizing information that the main broadcaster is controlled device compare;
The schematic diagram of all the other Broadcast Control device correction broadcast information in the method that Fig. 6 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides;
In the method that Fig. 7 plays for a kind of multi-screen synchronous that the embodiment of the present invention one provides, all the other Broadcast Control devices carry out synchronous schematic diagram;
The modular structure figure of the device that Fig. 8 plays for a kind of multi-screen synchronous that the embodiment of the present invention two provides.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
The flow process of the method schematic diagram of playing for a kind of multi-screen synchronous of the present invention, as shown in Figure 1, described method comprises:
Step 101: after the arbitrary Broadcast Control device in network starts, send request synchronous instruction to all Broadcast Control devices on network; Each described Broadcast Control device waits for that synchronization server sends synchronic command and carries out synchronously;
After each Broadcast Control device in network starts, set up respectively one and wait for synchronous and send request the thread of synchronic command, wait in synchronous send request synchronous instruction to network on all Broadcast Control devices, thereby synchronous to other Broadcast Control device requests.
Step 102: if there is no synchronization server in network, the Broadcast Control device in network, select a main broadcaster and control device as synchronization server;
All Broadcast Control devices all start to wait for that the main broadcaster controls device and carry out synchronously, owing to starting and also not having the main broadcaster to control device for the first time, so all Broadcast Control devices all can not get response.Each Broadcast Control device waited for respectively, waits for that the main player of competing out carries out synchronously as synchronization server.
As shown in Figure 2, in the present embodiment, network comprises three Broadcast Control devices, and their position, end, ip address from left to right increases successively.The stand-by period of each Broadcast Control device determined according to the ip end place value of self, and the last digit value is less, and the time of wait is shorter.In network, the ip of three known Broadcast Control devices end place value is respectively 3,5,10, and the corresponding stand-by period is respectively 3s, 5s, 10s; Do not control the response of device owing to there is no the main broadcaster, that Broadcast Control device that stand-by period is the shortest, the Broadcast Control device 1 of ip end place value minimum namely, reached the earliest the stand-by period, and during due to initial start, on current network, do not exist the main broadcaster to control device, therefore Broadcast Control device 1 competition becomes the main broadcaster and controls device, as synchronization server, thereby formed the competition mechanism of Broadcast Control device.
If due to the reason such as part suspension etc. is abnormal, caused in network having occurred that two main broadcasters control device, these two main broadcasters are controlled device and can be at war with according to sending number of broadcast times, send the more Broadcast Control device of number of broadcast times and continue to keep the main broadcaster to control the role of device, another Broadcast Control device is converted to the role of common Broadcast Control device.Competing successful main broadcaster controls device and sends synch command to all Broadcast Control devices as synchronization server, all the other Broadcast Control devices exit the competition main broadcaster controls the process of device, and sets up respectively two threads: for the thread to synchronization server transmission broadcast with for receive the thread of broadcast for the Broadcast Control device.
Step 103: synchronization server sends broadcast every one-period, and all the other receive the Broadcast Control device and receive broadcast.
When the synchronization server in network sends broadcast, send once broadcast to all Broadcast Control devices every 5s, comprise in broadcast whether the sender who sends broadcast is that the main broadcaster is controlled device and sent number of broadcast times information, the ip address that also comprises Broadcast Control device itself, also comprise in addition the broadcast information of current displaying video, the broadcasting list that comprises current broadcasting, the program in progress broadcasting list, the playing progress rate of program.As shown in Figure 3, in the present embodiment, in the broadcast sent as the Broadcast Control device 1 of synchronization server, sending number of broadcast times information is 123, the sender is main player, and the ip address of Broadcast Control device itself is 192.168.1.3, and the broadcast odd numbers of current broadcasting is 12345, program sequence number in progress broadcasting list is 3, and playing progress rate is 34567ms.
Step 104: from player, the information the broadcast received and the broadcast state of self are compared, as need synchronously send request synchronic command to synchronization server;
Other Broadcast Control devices in network receive the main broadcaster while controlling the broadcast that device sends, the current broadcast information of synchronization server in the broadcast message that extraction receives, the current broadcast information of the synchronization server the received broadcast information current from self compared: different if self current broadcast information and the main broadcaster who receives are controlled the broadcast information that device sends, change the current broadcast information of Broadcast Control device self into program that the main broadcaster is controlled the current broadcasting of device, directly jumping to the main broadcaster according to the broadcast information in broadcast controls the progress of device and is play, thereby realize synchronous between the Broadcast Control device.
Step 105: synchronization server sends synchronic command and carries out simultaneous operation to the Broadcast Control device.
If the broadcast information that the current broadcast information of other Broadcast Control devices in network is controlled the device transmission with the main broadcaster who receives is identical, and playing progress rate corresponding in both broadcast information is in deviation threshold, the broadcast information of Broadcast Control device is controlled device (synchronization server) with the main broadcaster and is synchronizeed, and the broadcast information of Broadcast Control device is not adjusted.Described deviation threshold affects the synchronism between the Broadcast Control device and adjusts frequency, deviation threshold is less, the synchronism of playing between the Broadcast Control device is better, but because the synchronic command between the Broadcast Control device sends more frequent, the main broadcaster is controlled device needs constantly to send synchronizing information, and in network, other Broadcast Control device need to extract the broadcast information in broadcast, the data pressure in network will be larger.If playing progress rate corresponding in both broadcast information is greater than deviation threshold, this Broadcast Control device sends request synch command to synchronization server, the broadcast information that in broadcast, the main broadcaster is controlled device is synchronized in current Broadcast Control device, thereby the playing progress rate that makes each Broadcast Control device is fully with the main broadcaster, to control device consistent.
As shown in Figure 4, the broadcast information of Broadcast Control device 2 correspondences is: the broadcast odd numbers that the main broadcaster is controlled the device broadcasting is 12345, and the program sequence number in progress broadcasting list is 3, and playing progress rate is 35432ms; The broadcast information of Broadcast Control device 3 correspondences is: the broadcast odd numbers that the main broadcaster is controlled the device broadcasting is 12345, and the program sequence number in progress broadcasting list is 3, and playing progress rate is 38000ms.In the present embodiment, as shown in Figure 5, set deviation threshold is 1s, by Broadcast Control device 2, the broadcast information extracted in the synchronic command that the broadcast information of Broadcast Control device 3 correspondences sends with the Broadcast Control device 1 of controlling device as the main broadcaster respectively compares, the playing progress rate of Broadcast Control device 2 is less than set deviation threshold 1s with the difference of the playing progress rate of the Broadcast Control device 1 of controlling device as the main broadcaster, and the difference of playing progress rate of the playing progress rate of Broadcast Control device 3 and the Broadcast Control device 1 of controlling device as the main broadcaster is more than 3s, be greater than set deviation threshold 1s, therefore, Broadcast Control device 2 is controlled device with the main broadcaster and is synchronizeed, maintain the original state, and Broadcast Control device 3 is not controlled device with the main broadcaster and is synchronizeed, need be adjusted, send request synchronic command to control the Broadcast Control device 1 of device as the main broadcaster, the main broadcaster is controlled device and is received the request synchronic command, and send synch command to Broadcast Control device 3.The main broadcaster is controlled device can add that the correction time is adjusted according to own current playing progress rate, and the correction time equals the tissue synchronization order and sends on network, and all Broadcast Control devices receive after this synch command and carry out redirect and play the required time.Organize after the synch command data main broadcaster to control device and sent synch command.As shown in Figure 6, when the main broadcaster is controlled the Broadcast Control device 1 transmission synch command of device, in broadcast information, except sending number of broadcast times information, be 123, the sender is main player, the ip address of Broadcast Control device itself is 192.168.1.3, the broadcast odd numbers of current broadcasting is 12345, and the program sequence number in progress broadcasting list is outside 3, also comprises that the playing progress rate that needs redirect is 35000ms.As shown in Figure 7, all Broadcast Control devices that receive synch command in network (comprise main broadcaster control device) are carried out the adjustment of playing progress rate according to the synch command received, the 35000ms that all jumps to the 3rd program play, thereby realized the synchronous of media resource plays in the network.
In the present embodiment, controlling by the main broadcaster as synchronization server current broadcast state corresponding to current broadcast state and other Broadcast Control devices self that device is corresponding compares, as asynchronous as both, the broadcast state of according to the main broadcaster, controlling device is synchronously adjusted corresponding Broadcast Control device, thereby each Broadcast Control device of controlling in network carries out the multi-screen synchronous broadcasting; And arbitrarily the Broadcast Control device can be used as synchronization server and carries out simultaneous operation, for case study on implementation provides a process that secure synchronization shows.
In other embodiments of the invention, also disclose the device that a kind of multi-screen synchronous is play, as shown in Figure 8, comprised as lower module:
Start module 801, after the arbitrary Broadcast Control device startup for network, send request synchronous instruction to all Broadcast Control devices on network; Each described Broadcast Control device waits for that synchronization server sends synchronic command and carries out synchronously;
Sending module 803, send broadcast for synchronization server every one-period, and all the other receive the Broadcast Control device and receive broadcast;
In described startup module, set up respectively one and wait for synchronous and send request the thread of synchronic command, wait in synchronous send request synchronous instruction to network on all Broadcast Control devices, thereby synchronous to other Broadcast Control device requests.
Described device also comprises the second competition module, competes out a Broadcast Control device for the competition mechanism according to setting from the Broadcast Control device at net and serves as synchronization server.If, and an abnormal rear system of Broadcast Control device of serving as synchronization server also can re-start competition, produce a new synchronization server.
In described competition module, if due to the reason such as part suspension etc. is abnormal, caused in network having occurred that two main broadcasters control device, these two main broadcasters are controlled device and can be at war with according to sending number of broadcast times, send the more Broadcast Control device of number of broadcast times and continue to keep the main broadcaster to control device, another Broadcast Control device is converted to common Broadcast Control device.
Described main broadcaster is controlled device and is sent synch command to all Broadcast Control devices as synchronization server, all the other Broadcast Control devices exit the competition main broadcaster controls the process of device, and sets up respectively two threads: for the thread to synchronization server transmission broadcast with for receive the thread of broadcast for the Broadcast Control device.
Comprise in described broadcast whether the sender who sends broadcast is that the main broadcaster is controlled device, sent number of broadcast times information, the ip address of Broadcast Control device itself, the broadcast information of current displaying video.
Described broadcast information comprises the broadcasting list of current broadcasting, the program in progress broadcasting list, the playing progress rate of program.
In described comparison module, if it is different that self current broadcast information and the main broadcaster who receives are controlled the broadcast information that device sends, by the Broadcast Control device, current broadcast information changes the program that the main broadcaster is controlled the current broadcasting of device into, directly jumps to the main broadcaster according to the broadcast information in broadcast and controls the progress of device and play.
In described comparison module, if the broadcast information that the current broadcast information of other Broadcast Control devices in network is controlled the device transmission with the main broadcaster who receives is identical, and playing progress rate corresponding in both broadcast information, in deviation threshold, is not adjusted the broadcast information of Broadcast Control device.
In described comparison module, if the current broadcast information of other Broadcast Control devices in network is controlled playing progress rate corresponding in the broadcast information of device transmission with the main broadcaster who receives and is greater than deviation threshold, this Broadcast Control device sends request synch command and controls device to the main broadcaster, and the broadcast information of main broadcaster in broadcast being controlled to device is synchronized in current Broadcast Control device.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection range with claim.
Claims (11)
1. the method that multi-screen synchronous is play, is characterized in that, comprises the steps:
After arbitrary Broadcast Control device in network starts, send request synchronous instruction to all Broadcast Control devices on network; Each described Broadcast Control device waits for that synchronization server sends synchronic command and carries out synchronously;
If there is no synchronization server in network, the Broadcast Control device in network, select a main broadcaster and control device as synchronization server;
Synchronization server sends broadcast every one-period, and all the other receive the Broadcast Control device and receive broadcast;
From player, the information the broadcast received and the broadcast state of self are compared, as need synchronously send request synchronic command to synchronization server;
Synchronization server sends synchronic command and carries out simultaneous operation to the Broadcast Control device.
2. method according to claim 1, it is characterized in that: after the arbitrary Broadcast Control device in described network starts, set up respectively one and wait for the synchronous thread with sending request synchronic command, wait in synchronous send request synchronous instruction to network on all Broadcast Control devices, thereby synchronous to other Broadcast Control device requests.
3. method according to claim 1, it is characterized in that: described method also comprises, compete out a Broadcast Control device according to the competition mechanism of setting from the Broadcast Control device at net and serve as synchronization server, if, and an abnormal rear system of Broadcast Control device of serving as synchronization server also can re-start competition, produce a new synchronization server.
4. method according to claim 1, it is characterized in that: when selecting a main broadcaster described Broadcast Control device in network and controlling device as synchronization server, if due to the reason such as part suspension etc. is abnormal, caused in network having occurred that two main broadcasters control device, these two main broadcasters are controlled device and can be at war with according to sending number of broadcast times, send the more Broadcast Control device of number of broadcast times and continue to keep the main broadcaster to control device, another Broadcast Control device is converted to common Broadcast Control device.
5. method according to claim 4, it is characterized in that: described main broadcaster is controlled device and is sent synch command to all Broadcast Control devices as synchronization server, all the other Broadcast Control devices exit the competition main broadcaster controls the process of device, and sets up respectively two threads: for the thread to synchronization server transmission broadcast with for receive the thread of broadcast for the Broadcast Control device.
6. according to arbitrary described method in claim 1,4 or 5, it is characterized in that: comprise in described broadcast whether the sender who sends broadcast is that the main broadcaster is controlled device, sent number of broadcast times information, the ip address of Broadcast Control device itself, the broadcast information of current displaying video.
7. method according to claim 6, it is characterized in that: described broadcast information comprises the broadcasting list of current broadcasting, the program in progress broadcasting list, the playing progress rate of program.
8. method according to claim 1, it is characterized in that: when described player compares the information in the broadcast received and the broadcast state of self, if it is different that self current broadcast information and the main broadcaster who receives are controlled the broadcast information that device sends, by the Broadcast Control device, current broadcast information changes the program that the main broadcaster is controlled the current broadcasting of device into, directly jumps to the main broadcaster according to the broadcast information in broadcast and controls the progress of device and play.
9. method according to claim 8, it is characterized in that: if the broadcast information that the current broadcast information of other Broadcast Control devices in network is controlled the device transmission with the main broadcaster who receives is identical, and playing progress rate corresponding in both broadcast information, in deviation threshold, is not adjusted the broadcast information of Broadcast Control device.
10. method according to claim 8, it is characterized in that: if the current broadcast information of other Broadcast Control devices in network is controlled playing progress rate corresponding in the broadcast information of device transmission with the main broadcaster who receives, be greater than deviation threshold, this Broadcast Control device sends request synch command and controls device to the main broadcaster, and the broadcast information of main broadcaster in broadcast being controlled to device is synchronized in current Broadcast Control device.
11. the device that multi-screen synchronous is play, is characterized in that, comprises as lower module:
Start module, after the arbitrary Broadcast Control device startup for network, send request synchronous instruction to all Broadcast Control devices on network; Each described Broadcast Control device waits for that synchronization server sends synchronic command and carries out synchronously;
The competition module, if there is no synchronization server for network, select a main broadcaster and control device as synchronization server the Broadcast Control device in network;
Sending module, send broadcast for synchronization server every one-period, and all the other receive the Broadcast Control device and receive broadcast;
Comparison module, for from player, the information of the broadcast that receives and the broadcast state of self being compared, as need synchronously send request synchronic command to synchronization server;
Synchronization module, send synchronic command for synchronization server and carry out simultaneous operation to the Broadcast Control device.
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