CN108540830A - A kind of more playback equipment synchronous broadcast methods, system and terminal - Google Patents
A kind of more playback equipment synchronous broadcast methods, system and terminal Download PDFInfo
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- CN108540830A CN108540830A CN201810328775.XA CN201810328775A CN108540830A CN 108540830 A CN108540830 A CN 108540830A CN 201810328775 A CN201810328775 A CN 201810328775A CN 108540830 A CN108540830 A CN 108540830A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 30
- 101150034273 SYS1 gene Proteins 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
A kind of more playback equipment synchronous broadcast methods of present invention offer, system and terminal.Network delay saltus step amount is can determine by the first currently playing progress, the second currently playing progress from the first present system time of playback equipment, the second present system time and main playback equipment, that is, determines whether the network-induced delay of adjacent synchronization message twice occurs saltus step.The absolute value of determining network delay saltus step amount is compared with saltus step threshold value, and then determines whether execute this time synchronization message received from playback equipment.It is more than the synchronization message of saltus step threshold value due to not executing network delay saltus step amount from playback equipment, therefore the picture of the master and slave playback equipment because caused by changing greatly network delay can be avoided to show nonsynchronous problem, improves the synchronization accuracy of master and slave playback equipment.
Description
Technical field
The present invention relates to field of video broadcasting technology more particularly to a kind of more playback equipment synchronous broadcast methods, system and
Terminal.
Background technology
More playback equipments are played simultaneously as a kind of method that same video and/or audio is played simultaneously in more playback equipments,
The places such as main application shows in advertisement, museum or Demonstration Hall.
Currently, the conventional method that more playback equipments are played simultaneously is：More playback equipments are connected to same LAN, setting
A wherein playback equipment is main playback equipment, remaining playback equipment is from playback equipment.When more playback equipments play simultaneously
When same video and/or audio, its currently playing progress is sent to from playback equipment by main playback equipment, from playback equipment according to
The current playing progress rate is synchronized to the playing progress rate of main playback equipment.Attached drawing 1 shows that more playback equipments are same in the related technology
Step plays the process schematic of video.By attached drawing 1 it is found that main playback equipment is sent out when playing progress rate is pos1 to from playback equipment
Synchronization message is sent, after network-induced delay d1, receives the synchronization message from playback equipment, and be synchronized to main playback equipment
Playing progress rate pos1.At this point, the playing progress rate of main playback equipment has progressed at pos1+d1, thus master and slave playback equipment
Synchronous error be d1.Main playback equipment sends synchronization message when playing progress rate is pos2 to from playback equipment, due to network
Delay time remains as d1, and therefore, the synchronous error of master and slave playback equipment remains as d1.When synchronous error is less than a frame video
When the duration of data, visually it is difficult to find that video is nonsynchronous.
Under normal conditions, since network-induced delay is generally less than one-frame video data duration, it is connected to same
Master and slave playback equipment in LAN just can reach high-precision synchronization without compensation.However, when network-induced delay is unexpected
When becoming larger, the synchronous error of master and slave playback equipment can be more than number frame picture, can visually find out that apparent picture is asynchronous.It is such as attached
In Fig. 1, main playback equipment sends synchronization message when playing progress rate is pos3 to from playback equipment, at this time since network is poor,
Network-induced delay increases to d2 by d1.The synchronization message is received from playback equipment, and is synchronized to the broadcasting of main playback equipment
Progress pos3.At this point, the playing progress rate of main playback equipment has progressed at pos3+d2, thus the synchronization of master and slave playback equipment
Error is d2.When synchronous error d2 is reached a certain level, it can visually see that apparent picture is asynchronous.
Invention content
The present invention provides a kind of more playback equipment synchronous broadcast methods, system and terminal, with solve network delay it is larger when,
The picture of master and slave playback equipment shows nonsynchronous problem.
In a first aspect, the present invention provides a kind of more playback equipment synchronous broadcast methods, including：
The synchronization message that main playback equipment is sent by preset sending frequency is obtained from playback equipment, the synchronization message includes
The currently playing progress of the main playback equipment；
System time when getting the synchronization message is determined as the present system time from playback equipment；
According to described from the first present system time of playback equipment, the second present system time and the main playback equipment
The first currently playing progress, the second currently playing progress determine network delay saltus step amount；Wherein, described first it is currently playing into
Degree and the second currently playing progress are respectively the currently playing progress that the adjacent synchronization message twice got includes；Described
System time when one present system time gets the first currently playing progress for described in from playback equipment；Described second
System time when present system time gets the second currently playing progress for described in from playback equipment；
Judge whether the absolute value numerical value of the network delay saltus step amount is less than saltus step threshold value；
If being less than, the described second currently playing progress is determined as the currently playing progress from playback equipment；
If more than or be equal to, then it is described not execute the synchronization message from playback equipment.
Second aspect, the present invention provide a kind of more playback equipment synchronous playing systems, including：
Synchronization message acquisition module, for obtaining the synchronization that main playback equipment is sent by preset sending frequency from playback equipment
Message；
Present system time determining module, for according to system time when getting the synchronization message determine it is described from
The present system time of playback equipment；
Network delay jumps variant determination module, for according to first present system time from playback equipment, second
First currently playing progress of present system time and the main playback equipment, the second currently playing progress determine that network delay is jumped
Variable；
Saltus step amount judgment module, for judging whether the absolute value numerical value of the network delay saltus step amount is less than saltus step threshold
Value；
Currently playing progress determining module is less than saltus step threshold value for the absolute value numerical value when the network delay saltus step amount
When, the described second currently playing progress is determined as the currently playing progress from playback equipment；
Execution module is used for when the absolute value numerical value of the network delay saltus step amount is greater than or equal to saltus step threshold value, institute
It states and does not execute the synchronization message from playback equipment.
The third aspect, the present invention provide a kind of terminal, include more playback equipment synchronous playing systems of second aspect.
The technical solution that the embodiment of the present invention provides can include the following benefits：
A kind of more playback equipment synchronous broadcast methods of present invention offer, system and terminal.Main playback equipment is sent as default
The synchronization message that frequency is sent, multiple synchronization messages can be got from playback equipment, as soon as and often receive time synchronization message,
System time when receiving synchronization message is determined as to the present system time from playback equipment.So, the last time receives
The system time of synchronization message is just the first present system time, and the currently playing progress in the synchronization message received is the
One currently playing progress；And the system time for this time receiving synchronization message is the second present system time, and receive same
It is the second currently playing progress to walk the currently playing progress in message.According to from playback equipment the first present system time,
First currently playing progress of two present system times and main playback equipment, the second currently playing progress determine network delay saltus step
Amount determines the difference of the network-induced delay of adjacent synchronization message twice.By the absolute value of determining network delay saltus step amount with
Saltus step threshold value is compared, and when the absolute value of network delay saltus step amount is greater than or equal to saltus step threshold value, is not held from playback equipment
The row synchronization message.When the absolute value of network delay saltus step amount is less than saltus step threshold value, the synchronization message is executed from playback equipment,
The second currently playing progress is determined as the currently playing progress from playback equipment, realizes that the broadcasting of master and slave playback equipment is same
Step.It is more than the synchronization message of saltus step threshold value due to not executing network delay saltus step amount, can avoids changing because of network delay
The picture of master and slave playback equipment shows nonsynchronous problem caused by larger.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the playing process schematic diagram of the existing playback equipment of separate unit in the related technology；
Fig. 2 is the flow diagram of more playback equipment synchronous broadcast methods provided in an embodiment of the present invention；
Fig. 3 is transmittance process schematic diagram of the synchronization message provided in an embodiment of the present invention between master and slave playback equipment.
Specific implementation mode
When more playback equipments carry out audio video synchronization broadcasting, more playback equipments are connected to same LAN, set it
In playback equipment be main playback equipment, remaining playback equipment is from playback equipment.When more playback equipments play together simultaneously
When one video, its currently playing progress is sent to from playback equipment by main playback equipment, currently playing according to this from playback equipment
Progress is synchronized to the playing progress rate of main playback equipment.Its currently playing progress is sent to the mistake from playback equipment by main playback equipment
Cheng Zhong, there are network delays.Under normal conditions, since network-induced delay is generally less than one-frame video data duration,
The master and slave playback equipment in same LAN is connected to without compensation, just can reach high-precision synchronization.Work as network-induced delay
When becoming larger suddenly, the synchronous error of master and slave playback equipment can be more than number frame picture, can visually find out that apparent picture is asynchronous.
In view of the above-mentioned problems, a kind of more playback equipment synchronous broadcast methods of the embodiment of the present application offer, system and terminal.This
Apply for that the core concept for more playback equipment synchronous broadcast methods that embodiment provides is：Main playback equipment is sent out by preset sending frequency
Send synchronization message, multiple synchronization messages can be got from playback equipment, as soon as and often receive time synchronization message, will receive
System time when synchronization message is determined as the present system time from playback equipment.So, the last time receives synchronization message
System time be just the first present system time, and the currently playing progress in the synchronization message received is first currently to broadcast
Degree of putting into；And the system time for this time receiving synchronization message is the second present system time, and in the synchronization message received
Currently playing progress be the second currently playing progress.According to the first present system time from playback equipment, the second current system
The first currently playing progress, the second currently playing progress of system time and main playback equipment determine network delay saltus step amount, i.e., really
The difference of the network-induced delay of fixed adjacent synchronization message twice.By the absolute value of determining network delay saltus step amount and saltus step threshold value
It is compared, when the absolute value of network delay saltus step amount is greater than or equal to saltus step threshold value, does not execute the synchronization from playback equipment
Message.When the absolute value of network delay saltus step amount is less than saltus step threshold value, the synchronization message is executed from playback equipment, i.e., will be synchronized
Currently playing progress in message is determined as the currently playing progress from playback equipment, realizes that the broadcasting of master and slave playback equipment is same
Step.The synchronization message larger due to not executing network delay saltus step amount, can avoid drawing because network delay changes greatly
The picture of the master and slave playback equipment risen shows nonsynchronous problem.
More playback equipment synchronous broadcast methods, system and terminal provided by the embodiments of the present application are specifically retouched below
It states.
Attached drawing 2 is please referred to, attached drawing 2 shows the flow of more playback equipment synchronous broadcast methods provided by the embodiments of the present application
Schematic diagram.
By attached drawing 2 it is found that more playback equipment synchronous broadcast methods provided by the embodiments of the present application specifically include：
S01：The synchronization message that main playback equipment is sent by preset sending frequency, the synchronization message are obtained from playback equipment
Include the currently playing progress of the main playback equipment.
When playback equipment is played out with normal playback speed, i.e. a speed play, the forward speed of playing progress rate with broadcast
The forward speed for putting the system time of equipment is consistent, if system time often advances 1s, then playing progress rate advance 1s.If one
Film source length is 100s, then playback equipment, which plays this film source, needs 100s.
When multiple playback equipments carry out audio video synchronization broadcasting when, main playback equipment can according to setting transmission frequency by its own
Currently playing progress be sent to respectively from playback equipment as synchronization message.Wherein, playing progress rate, that is, playing time or play when
Between.Such as, when set transmission frequency as 10s/ times when, main playback equipment can be under the control of thread in 0s, 10s, 20s etc.
Moment to respectively its playing progress rate at the moment such as 0s, 10s, 20s when is sent from playback equipment, that is, send it is currently playing into
Degree, and remaining moment thread is then in a dormant state.In this way, in the embodiment of the present application, by the dormancy time control for controlling thread
The transmission frequency of synchronization message processed.In the embodiment of the present application, preset sending frequency is generally 200ms/ times, is disappeared to avoid synchronizing
Breath sends and frequently results in very much network congestion, and then network delay is caused to become larger.
In the embodiment of the present application, the adjacent progress currently playing twice that main playback equipment is sent first is referred to as to work as
Preceding playing progress rate and the second currently playing progress, i.e., the currently playing progress that this time main playback equipment is sent are second currently playing
Progress, the currently playing progress that last time main playback equipment is sent are the first currently playing progress, it is, first it is currently playing into
Sending time of the sending time of degree earlier than the second currently playing progress.
Further, synchronization message further includes currently playing source name.After playback equipment gets synchronization message, first
The currently playing source name received is compared with being played on source name.Only when current in synchronization message
It, just can be according to currently playing in synchronization message from playback equipment when broadcasting piece source name is consistent with being played on source name
Progress synchronizes broadcasting.
At the end of the dormancy time of thread, thread controls main playback equipment and sends synchronization message, to realize that main broadcaster is put
Equipment sends synchronization message by preset sending frequency.Main playback equipment needs to obtain working as main playback equipment when sending synchronization message
Preceding playing progress rate, to generate synchronization message.In more playback equipment synchronous broadcast methods provided by the embodiments of the present application, one is provided
The method that the main playback equipment of kind obtains currently playing progress.Particular content is as follows：
S0111：It calls the system time of main playback equipment, preceding audio Presentation Time Stamp, preceding system time and preceding does not export
Audio duration.
Often a frame audio is written to audio output module in playback equipment, will automatically record the Presentation Time Stamp of the audio
The audio duration not exported in (i.e. audio Presentation Time Stamp), system time and audio output module.When write-in next frame sound
When frequency, the audio duration not exported in audio Presentation Time Stamp, system time and audio output module can automatically update.By
This, playback equipment can store three data simultaneously after a frame audio is written to audio output module, i.e., previous frame audio is aobvious
Show timestamp, system time at that time and the audio duration not exported in audio output module at that time.The display of previous frame audio
Audio is shown before timestamp, system time at that time and the audio duration that is not exported in audio output module at that time are briefly referred to as
Timestamp, preceding system time and preceding audio duration is not exported.
S0112：It is determined according to system time, preceding system time, preceding audio Presentation Time Stamp and the preceding audio duration that do not export
The currently playing progress of main playback equipment.
When main playback equipment is needed to when sending its currently playing progress from playback equipment, when with delivery time being current
It carves, then playing progress rate at this time is currently playing progress, and system time is present system time at this time.When by current system
Between subtracted with the sum of preceding audio Presentation Time Stamp before system time and the preceding audio duration that do not export obtain the current of main playback equipment
Playing progress rate.
The method that above-mentioned main playback equipment obtains currently playing progress is only provided by the embodiments of the present application a kind of schematic
Method, and above-described embodiment does not limit the acquisition methods of currently playing progress.
S02：By system time when getting the synchronization message be determined as it is described from the current system of playback equipment when
Between.
System time when receiving synchronization message from playback equipment is determined as to the present system time from playback equipment.
As shown in Fig. 3, main playback equipment sends synchronization message 1 when currently playing progress is pos1 to from playback equipment, by net
After network postpones the d times, the synchronization message 1 is received when system time is sys1 from playback equipment, i.e., is received from playback equipment
The sys1 moment to synchronization message 1 is the present system time from playback equipment.
S03：It is put from the first present system time, the second present system time and the main broadcaster of playback equipment according to described
The first currently playing progress, the second currently playing progress of equipment determine network delay saltus step amount.
Since main playback equipment constantly sends synchronization message, and adjacent two according to preset sending frequency to from playback equipment
Currently playing progress in subsynchronous message is respectively the first currently playing progress and the second currently playing progress, therefore, from broadcasting
It puts system time when equipment receives adjacent synchronization message twice and is referred to as the first present system time and the second current system
It unites the time.System time when will receive the synchronization message including the first currently playing progress from playback equipment is determined as
One present system time, system time when receiving the synchronization message including the second currently playing progress from playback equipment is true
It is set to the second present system time.Such as main playback equipment is respectively respectively in currently playing progress according to preset sending frequency
Synchronization message 2-5 is sent to from playback equipment when pos2, pos3, pos4 and pos5, is disappeared from playback equipment according to getting to synchronize
The time of breath 2-5 is determined as multiple present system times, i.e. present system time sys2, sys3, sys4 and sys5.If it is determined that main
Second currently playing progress of playback equipment is pos5, then the currently playing progress of the first of main playback equipment is pos4；From broadcasting
Second present system time of equipment is sys5, is sys4 from the first present system time of playback equipment.
If synchronization message in transmission process, causes network-induced delay to change due to network, i.e., front and back two
Saltus step occurs for the network delay of subsynchronous message, then the screen display content for being easy to cause master and slave playback equipment is inconsistent.For
This, it is thus necessary to determine that network delay saltus step whether occurs between adjacent synchronization message twice.
In the embodiment of the present application, according to the first present system time, the second present system time and master from playback equipment
The first currently playing progress, the second currently playing progress of playback equipment determine network delay saltus step amount.Specifically,
S031：It will be determined as from the difference between the second present system time and the first present system time of playback equipment
Time difference.
In attached drawing 3, if being sys3 from the second present system time of playback equipment, first from playback equipment is current
System time is sys2.It will be between the second present system time sys3 and the first present system time sys2 of playback equipment
Time difference is set as the time difference from playback equipment.Likewise, the difference between system time sys2, sys1 can also be set
For from the time difference of playback equipment.
S032：Difference between the second of main playback equipment currently playing progress and the first currently playing progress is determined as
Progress difference.
In attached drawing 3, if being sys3 from the second present system time of playback equipment, what is received from playback equipment is same
It walks in message, the second currently playing progress of main playback equipment is pos3, and the first currently playing progress of main playback equipment is
pos2.Difference between the second of the main playback equipment currently playing currently playing progress pos2 of progress pos3 and first is determined as
The progress difference of main playback equipment.
S033：Difference between time difference and progress difference is determined as network delay saltus step amount.
After the progress difference of time difference and main playback equipment from playback equipment determines, by time difference and progress difference
Between difference be determined as network delay saltus step amount.In attached drawing 3, network delay saltus step amount be time difference sys3-sys2 and
Difference between progress difference pos3-pos2, i.e. sys3-sys2- (pos3-pos2)=D-d.For another example, network delay saltus step amount
For the difference between time difference sys2-sys1 and progress difference pos2-pos1, i.e. sys2-sys1- (pos2-pos1)=0.
Further, it when receiving the synchronization message including currently playing progress for the first time from playback equipment, then receives
The system time when synchronization message is the second present system time, and the first present system time is 0.In attached drawing 3, from broadcasting
It is sys1 from the second present system time of playback equipment when putting equipment and receiving synchronization message 1, and from the first of playback equipment
Present system time is 0, i.e., synchronization message was not received by before this receives synchronization message.
For this purpose, according to the first present system time, the second present system time and main playback equipment from playback equipment
The first currently playing progress, before the second currently playing progress determines network delay saltus step amount, it is also necessary to determine from playback equipment
Whether the synchronization message received is first time synchronization message, in order to decide whether to execute after determining network delay saltus step amount
This synchronization message.
Specifically, judge whether the first present system time is zero.If the first present system time is zero, disappear synchronizing
The first currently playing progress in breath is determined as the currently playing progress from playback equipment, i.e., directly executes this from playback equipment
Synchronization message, to realize the synchronization of master and slave playback equipment.If the first present system time is not zero, according to from playback equipment
The first present system time, the second present system time and main playback equipment the first currently playing progress, second currently broadcast
Degree of putting into determines network delay saltus step amount.
S04：Judge whether the absolute value numerical value of the network delay saltus step amount is less than saltus step threshold value.
The synchronization message received whether is executed from playback equipment for ease of determination, then needs to judge determining network delay
Whether the absolute value numerical value of saltus step amount is less than saltus step threshold value.
In the embodiment of the present application, saltus step threshold value is fixed saltus step threshold value or dynamic hop threshold value.Since network delay is
Real-time change, thus the absolute value numerical value of network delay saltus step amount is usually not zero.For being played simultaneously for more playback equipments,
It needs to accomplish accurate, Fast synchronization.For precisely synchronizing, then the setting value of saltus step threshold value wants small, to reduce network delay jump
Become the influence to being played simultaneously.It for Fast synchronization, then needs to execute synchronization message as early as possible from playback equipment, i.e. saltus step threshold value
Setting value is big, so as to constantly execute synchronization message from playback equipment.More playback equipments are precisely played simultaneously and soon as a result,
It is contradictory that speed, which is played simultaneously,.Therefore, in the embodiment of the present application, to realize accurate, the Fast synchronization of more playback equipments, saltus step threshold
Value is dynamic hop threshold value, as continually changing saltus step threshold value.
It is master and slave to broadcast to meet visual demand of the people to video when master and slave playback equipment carries out audio video synchronization broadcasting
It puts when equipment synchronizes and needs to meet certain synchronization accuracy, i.e., meet certain broadcasting time difference when being played simultaneously, broadcast Ru master and slave
It is 100ms to put equipment and the synchronization accuracy of video is played simultaneously.Assuming that synchronization when current master and slave playback equipment is played simultaneously video
Precision is 100ms, when the broadcasting time difference when detecting main playback equipment and from playback equipment is less than synchronization accuracy requirement, is such as played
The time difference is 50ms, at this point, dynamic hop threshold value is then automatically made smaller numerical value, is disappeared in order to allow to abandon Partial synchronization
Breath, improves main playback equipment and the broadcasting precision from playback equipment.When detecting main playback equipment and from the broadcasting of playback equipment
When the time difference is more than synchronization accuracy requirement, when such as the broadcasting time difference is 3s, at this point, dynamic hop threshold value is then automatically made larger number
Value, but the numerical value improves main playback equipment and is set from broadcasting less than synchronization accuracy in order to abandon synchronization message as few as possible
Standby synchronizing speed.
As a result, in the embodiment of the present application, determine that dynamic is jumped according to main playback equipment and from the synchronization accuracy of playback equipment
Become threshold value, and the numerical value of dynamic hop threshold value is more than zero and is less than synchronization accuracy.Such as, when main playback equipment and from playback equipment
Synchronization accuracy requires to be less than 50ms to play the time difference, then setting is all higher than zero and is less than 50ms dynamic hop threshold value every time.
S05：If being less than, the currently playing progress in the synchronization message is determined as described from the current of playback equipment
Playing progress rate.
It is when the absolute value numerical value of network delay saltus step amount is less than saltus step threshold value, second in synchronization message is currently playing
Progress is determined as the currently playing progress from playback equipment, i.e., this synchronization message is executed from playback equipment.
S06：If more than or be equal to, then it is described not execute the synchronization message from playback equipment.
When the absolute value numerical value of network delay saltus step amount is greater than or equal to saltus step threshold value, this is not executed from playback equipment
Synchronization message, i.e., abandon this synchronization message from playback equipment.
In more playback equipment synchronous broadcast methods provided by the embodiments of the present application, by current from the first of playback equipment
System time, the first currently playing progress of the second present system time and main playback equipment, the second currently playing progress can
It determines network delay saltus step amount, that is, determines whether the network-induced delay of adjacent synchronization message twice occurs saltus step.It will be determining
Whether the absolute value of network delay saltus step amount is compared with saltus step threshold value, and then determine to execute from playback equipment and receive
This time synchronization message.When being more than the synchronization message of saltus step threshold value due to not executing network delay saltus step amount from playback equipment,
The picture of the master and slave playback equipment because caused by changing greatly network delay can be avoided to show nonsynchronous problem, improve it is main,
From the synchronization accuracy of playback equipment.
Based on more playback equipment synchronous broadcast methods provided by the embodiments of the present application, the embodiment of the present application also provides a kind of more
Playback equipment synchronous playing system.More playback equipment synchronous playing systems provided by the embodiments of the present application include：
Synchronization message acquisition module, for obtaining the synchronization that main playback equipment is sent by preset sending frequency from playback equipment
Message；
Present system time determining module, for being determined from playback equipment according to system time when getting synchronization message
Present system time；
Network delay jumps variant determination module, for according to from the first present system time of playback equipment, second current
First currently playing progress of system time and main playback equipment, the second currently playing progress determine network delay saltus step amount；
Saltus step amount judgment module, for judging whether the absolute value numerical value of network delay saltus step amount is less than saltus step threshold value；
Currently playing progress determining module is used for when the absolute value numerical value of network delay saltus step amount is less than saltus step threshold value,
Second currently playing progress is determined as the currently playing progress from playback equipment；
Execution module is used for when the absolute value numerical value of network delay saltus step amount is greater than or equal to saltus step threshold value, from broadcasting
Equipment does not execute synchronization message.
Based on more playback equipment synchronous playing systems provided by the embodiments of the present application, the embodiment of the present application also provides a kind of end
End, which includes more playback equipment synchronous playing systems in foregoing description.
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on this understanding, the technical solution in the embodiment of the present invention substantially or
Say that the part that contributes to existing technology can be expressed in the form of software products, which can deposit
Storage is in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that computer equipment (can be with
Be personal computer, server either network equipment etc.) execute certain part institutes of each embodiment of the present invention or embodiment
The method stated.
Invention described above embodiment is not intended to limit the scope of the present invention..
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice the disclosure invented here
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the invention is not limited in the precision architectures for being described above and being shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (7)
1. a kind of more playback equipment synchronous broadcast methods, which is characterized in that including：
The synchronization message that main playback equipment is sent by preset sending frequency is obtained from playback equipment, the synchronization message includes described
The currently playing progress of main playback equipment；
System time when getting the synchronization message is determined as the present system time from playback equipment；
According to described from the of the first present system time of playback equipment, the second present system time and the main playback equipment
One currently playing progress, the second currently playing progress determine network delay saltus step amount；Wherein, the described first currently playing progress and
Second currently playing progress is respectively the currently playing progress that the adjacent synchronization message twice got includes；Described first works as
System time when preceding system time gets the first currently playing progress for described in from playback equipment；Described second is current
System time when system time gets the second currently playing progress for described in from playback equipment；
Judge whether the absolute value numerical value of the network delay saltus step amount is less than saltus step threshold value；
If being less than, the described second currently playing progress is determined as the currently playing progress from playback equipment；
If more than or be equal to, then it is described not execute the synchronization message from playback equipment.
2. more playback equipment synchronous broadcast methods according to claim 1, which is characterized in that according to described from playback equipment
The first present system time, the second present system time and the main playback equipment the first currently playing progress, second work as
Preceding playing progress rate determines that network delay saltus step amount includes：
Difference between second present system time and the first present system time from playback equipment is determined as the time
Difference；
Difference between the second currently playing progress and the first currently playing progress of the main playback equipment is determined as progress
Difference；
Difference between the time difference and the progress difference is determined as network delay saltus step amount.
3. more playback equipment synchronous broadcast methods according to claim 1, which is characterized in that according to described from playback equipment
The first present system time, the second present system time and the main playback equipment the first currently playing progress, second work as
Before preceding playing progress rate determines network delay saltus step amount, including：
Judge whether the first present system time is zero；
If first present system time is zero, the first currently playing progress in the synchronization message is determined as described
From the currently playing progress of playback equipment；
If first present system time is not zero, from the first present system time of playback equipment, second according to
First currently playing progress of present system time and the main playback equipment, the second currently playing progress determine that network delay is jumped
Variable.
4. more playback equipment synchronous broadcast methods according to claim 1, which is characterized in that the saltus step threshold value is to fix
Saltus step threshold value or dynamic hop threshold value.
5. more playback equipment synchronous broadcast methods according to claim 4, which is characterized in that according to the main playback equipment
Determine the dynamic hop threshold value from the synchronization accuracy of playback equipment with described, the numerical value of the dynamic hop threshold value be more than zero and
Less than the synchronization accuracy.
6. a kind of more playback equipment synchronous playing systems, which is characterized in that including：
Synchronization message acquisition module disappears for obtaining main playback equipment from playback equipment by synchronizing of sending of preset sending frequency
Breath；
Present system time determining module, it is described from broadcasting for being determined according to system time when getting the synchronization message
The present system time of equipment；
Network delay jumps variant determination module, for according to first present system time from playback equipment, second current
First currently playing progress of system time and the main playback equipment, the second currently playing progress determine network delay saltus step
Amount；
Saltus step amount judgment module, for judging whether the absolute value numerical value of the network delay saltus step amount is less than saltus step threshold value；
Currently playing progress determining module is used for when the absolute value numerical value of the network delay saltus step amount is less than saltus step threshold value,
Described second currently playing progress is determined as the currently playing progress from playback equipment；
Execution module, for when the absolute value numerical value of the network delay saltus step amount be greater than or equal to saltus step threshold value when, it is described from
Playback equipment does not execute the synchronization message.
7. a kind of terminal, which is characterized in that including more playback equipment synchronous playing systems described in claim 6.
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
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