CN104602037A - Method, device, terminal and system for controlling synchronous playing of multiple devices - Google Patents

Method, device, terminal and system for controlling synchronous playing of multiple devices Download PDF

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Publication number
CN104602037A
CN104602037A CN201510069221.9A CN201510069221A CN104602037A CN 104602037 A CN104602037 A CN 104602037A CN 201510069221 A CN201510069221 A CN 201510069221A CN 104602037 A CN104602037 A CN 104602037A
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China
Prior art keywords
equipment
control
play
control information
main equipment
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CN201510069221.9A
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Chinese (zh)
Inventor
廖华平
戴伦学
余智超
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Fuzhou Rockchip Electronics Co Ltd
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Fuzhou Rockchip Electronics Co Ltd
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Priority to CN201510069221.9A priority Critical patent/CN104602037A/en
Publication of CN104602037A publication Critical patent/CN104602037A/en
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    • 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]
    • H04N21/20—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
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • 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

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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

The invention provides a method for controlling synchronous playing of multiple devices. The method includes that a master device sends control information to a slave device, wherein the control information includes predicted playing progress Tc0 of the slave device during control information receiving and a predicted command execution moment Tc2; the slave device receives the control information, performs a first judgment operation and executes a playing control scheme according to a judgment result of the first judgment operation, wherein the first judgment operation specifically includes calculating a formula of VT=(Td2-Tc2)-(Td0-Tc0) and comparing |VT| with a preset first time threshold value T1, the Td2 refers to a system moment when the slave device performs the first judgment operation, and the Td0 refers to current playing progress of the slave device. The invention further provides a device, a terminal and a system for controlling synchronous playing of the multiple devices to implement the method. Compared with the prior art, the method, the device, the terminal and the system have the advantages that playing time can be controlled more accurately, and synchronous playing of the multiple devices is guaranteed to the greatest extent.

Description

Many device synchronization control method for playing back, equipment, terminal and system
Technical field
The present invention relates to multimedia technology field, the control method of particularly a kind of many device synchronization broadcastings and system.
Background technology
DLNA agreement (DIGITAL LIVING NETWORK ALLIANCE) is initiated to set up by enterprises such as Sony, Intel, Microsofts, be intended to solve individual PC, consumer appliances, mobile device interconnect interior wireless network and cable network, make the unconfined shared and growth of Digital Media and content service become possibility, current member company has reached family more than 280.But how simultaneously synchronous DLNA agreement do not provide about playing method between many equipment; Current common practices of the prior art determines whether then to play with the time received by contrast current play time, if but playback equipment is many, and the network delay between each playback equipment is inconsistent, the time then receiving play command is also inconsistent, then easily occur different synchronous between each playback equipment.Existing a kind of patented technology discloses the time of implementation being estimated order by computing network time delay, but there are the following problems: A, B are playback equipment, C (control) is control appliance, when order arrives B ahead of time, and order AB sound is at this moment synchronous correct broadcasting, the progress that so now B upgrades oneself will lead to errors.
Summary of the invention
For this reason, need to provide a kind of to control more accurately, at utmost to ensure the scheme that many device synchronization are play to reproduction time.
For achieving the above object, inventor provide a kind of many device synchronization control method for playing back, comprise step:
A kind of many device synchronization control method for playing back, comprises step:
Main equipment sends control information to from equipment, and described control information comprises the playing progress rate T estimated when receiving control information from equipment c0with expectation command execution moment T c2;
Receive the control information of autonomous device from equipment, carry out the first judgement operation, and judge that the judged result of operation performs Play Control scheme according to first,
Described first judges that operation specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for carrying out system time during the first judgement operation from equipment; T d0for from the current playing progress rate of equipment.
Further, in described many device synchronization control method for playing back, described " judging that the judged result of operation performs Play Control scheme according to first " specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T from equipment at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control from equipment, and adjust VT by before the playing progress rate of equipment.
Further, in described many device synchronization control method for playing back, also comprise command type in described control information, described command type comprises Play Control or player attribute regulates;
Carry out the first judgement operation after receiving the control information of autonomous device from equipment and from equipment before, also carry out one second judge operation from equipment, described second judges that operation specifically comprises:
Judge play command type, when judging that play command type is as carrying out the first judgement operation during Play Control, when judging that play command type directly performs the adjusting command of described player attribute when regulating as player attribute.
Further, in described many device synchronization control method for playing back, described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment;
Described Play Control comprises progress and regulates, plays and suspend or play stopping.
Further, in described many device synchronization control method for playing back, described intended recipient moment T c2system time T when being sent control information according to main equipment by main equipment c1with information transmission time VT mcalculate;
Playing progress rate T when described expectation receives control information from equipment c0playing progress rate T when being sent control information according to main equipment by main equipment d1with information transmission time VT mcalculate.
Further, in described many device synchronization control method for playing back, main equipment is to the network environment test also comprising preset times before sending control information from equipment, described network environment test specifically comprises: main equipment sends detecting information to from equipment, after equipment receives described detecting information, return response message immediately to main equipment, main equipment tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as information transmission time VT using repeatedly network environment m.
Further, in described many device synchronization control method for playing back, main equipment with from equipment with predeterminated frequency carry out repeatedly time synchronized operate with guarantee main equipment with from equipment, there is consistent system time.
Inventor additionally provides a kind of many device synchronization broadcasting control system simultaneously, comprises main equipment and at least one from equipment;
Described main equipment comprises the first communication unit; Describedly comprise second communication unit, judging unit and performance element from equipment;
Described main equipment is sent control information to from equipment by the first communication unit, and described control information comprises the playing progress rate T estimated when receiving control information from equipment c0with expectation command execution moment T c2;
The described control information receiving autonomous device from equipment by second communication unit, described judging unit carries out the first judgement operation, according to first, described performance element judges that the judged result of operation performs Play Control scheme,
The first judgement operation that described judging unit carries out specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for carrying out system time during the first judgement operation from equipment; T d0for from the current playing progress rate of equipment.
Further, in described many device synchronization broadcasting control system, according to first, described performance element judges that the judged result of operation performs Play Control scheme and specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control, and adjust VT by before the playing progress rate of equipment.
Further, in described many device synchronization broadcasting control system, also comprise command type in described control information, described command type comprises Play Control or player attribute regulates;
After the control information receiving autonomous device from equipment by second communication unit and before described judging unit carries out the first judgement operation, described judging unit also carries out one second and judges operation, and described second judges that operation specifically comprises:
Judge play command type, when judging play command type as Play Control, judging unit carries out the first judgement operation, and when judging that play command type regulates as player attribute, performance element directly performs the adjusting command of described player attribute.
Further, in described many device synchronization broadcasting control system, described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment;
Described Play Control comprises progress and regulates, plays and suspend or play stopping.
Further, in described many device synchronization broadcasting control system, described main equipment also comprises computing unit;
Described intended recipient moment T c2system time T when being sent control information according to main equipment by computing unit c1with information transmission time VT mcalculate;
Playing progress rate T when described expectation receives control information from equipment c0playing progress rate T when being sent control information according to main equipment by computing unit d1with information transmission time VT mcalculate.
Further, in described many device synchronization broadcasting control system, main equipment by the first communication unit to the network environment test also comprising preset times before sending control information from equipment, described network environment test specifically comprises: main equipment sends detecting information by the first communication unit to from equipment, response message is returned by second communication unit to main equipment immediately after equipment receives described detecting information, the computing unit of main equipment tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as information transmission time VT using repeatedly network environment m.
Further, in described many device synchronization broadcasting control system, main equipment with carry out repeatedly time synchronized by the first communication unit and second communication unit with predeterminated frequency from equipment and operate guarantee main equipment and from equipment, there is consistent system time.
Inventor additionally provides a kind of many device synchronization playback control device simultaneously, comprises the first communication unit, and described equipment is sent control information to terminal by the first communication unit, and described control information comprises playing progress rate T when anticipated terminal receives control information c0with expectation command execution moment T c2.
Further, in described many device synchronization playback control device, also computing unit is comprised;
Described intended recipient moment T c2system time T when being sent control information according to equipment by computing unit c1with information transmission time VT mcalculate;
Described anticipated terminal receives playing progress rate T during control information c0playing progress rate T when being sent control information according to equipment by computing unit d1with information transmission time VT mcalculate.
Inventor additionally provides a kind of many device synchronization Play Control terminal simultaneously, comprises second communication unit, judging unit and performance element;
Described terminal receives the control information from control appliance by second communication unit, and described judging unit carries out the first judgement operation, according to first, described performance element judges that the judged result of operation performs Play Control scheme,
The first judgement operation that described judging unit carries out specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for described terminal carries out system time when the first judgement operates; T d0for the current playing progress rate of described terminal.
Further, in described many device synchronization Play Control terminal, according to first, described performance element judges that the judged result of operation performs Play Control scheme and specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control, and adjust VT by before the playing progress rate of equipment.
Be different from prior art, technique scheme adopts to compare to be estimated playing progress rate, estimates that command execution moment and actual play progress, actual command perform magnitude relationship between the moment and compared with predetermined threshold value, in this, as the mode that foundation judges and adjusts, more accurate to the control of reproduction time, ensure that multiple device plays is synchronous to greatest extent.
Accompanying drawing explanation
Fig. 1 is the flow chart of many device synchronization control method for playing back described in an embodiment of the present invention;
Fig. 2 is the structural representation of many device synchronization broadcasting control system described in an embodiment of the present invention;
Fig. 3 is the structural representation of many device synchronization playback control device described in an embodiment of the present invention;
Fig. 4 is the structural representation of many device synchronization Play Control terminal described in an embodiment of the present invention.
Description of reference numerals:
1-main equipment
2-is from equipment
11-first communication unit
12-computing unit
21-second communication unit
22-judging unit
23-performance element
Embodiment
By describe in detail technical scheme technology contents, structural feature, realized object and effect, coordinate accompanying drawing to be explained in detail below in conjunction with specific embodiment.
Referring to Fig. 1, is the flow chart of many device synchronization control method for playing back described in an embodiment of the present invention; Described method comprises the steps:
Step S1, main equipment and connect from equipment;
Wherein main equipment refers to start to control the equipment making of and play the effect of NTP time server in the system that the equipment of multiple synchronous playing task forms.The equipment that primary device regulation and control are play from equipment refers at least one system formed at the equipment of multiple synchronous playing task.Described connection can be wired connection or wireless connections, main equipment and can make that follow-up reciprocal process is smooth and easy stablely carries out from setting up certain annexation between equipment.
Step S2, network environment are tested;
When main equipment is with after equipment networking, main equipment is leading carries out network environment test, namely detecting information is sent by main equipment to from equipment, after equipment receives described detecting information, return response message immediately to main equipment, main equipment tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as the information transmission time using repeatedly network environment.The Main Function of network environment testing procedure obtains network state and then the estimated information transmission time receives orders or exectorial moment point from equipment for inferring, also can adopt in other embodiments unactual carry out information transmission mode and simply the information transmission time is inferred or estimates.
Step S3, main equipment and carry out time synchronized operation from equipment;
Further, after the operation of first time synchronized, every prefixed time interval, main equipment again with carry out a time synchronized from equipment and operate, to guarantee the unlikely error occurring influence time levels of precision in system During Process of Long-term Operation.
Step S4, main equipment send control information to from equipment;
In this step, described control information comprises the playing progress rate T estimated when receiving control information from equipment c0with expectation command execution moment T c2;
Described intended recipient moment T c2system time T when being sent control information according to main equipment by main equipment c1with information transmission time VT mcalculate;
Playing progress rate T when described expectation receives control information from equipment c0playing progress rate T when being sent control information according to main equipment by main equipment d1with information transmission time VT mcalculate." playing progress rate " described in present embodiment all refers to the broadcasting process to a certain playing task on equipment, can represent with the time point on its reproduction time axle, if the beginning on reproduction time axle is considered as zero point, then on time shaft one can determine numeric representation playing progress rate, the essence of playing progress rate is a time information relevant to reproduction time axle.
Step S5, receive the control information of autonomous device from equipment, and carry out the second judgement operation;
In this step second judges to be operating as one can selection operation, performs during for also comprising command type in described control information.Described command type comprises Play Control or player attribute regulates.In other embodiments, as control information does not comprise command type, then do not perform described second and judge operation.
Described second judges that operation specifically comprises:
Judge play command type, when judging that play command type is as entering step S7 (carrying out the first judgement operation) during Play Control, directly step S6 is performed, i.e. described player attribute adjusting command when judging that play command type regulates as player attribute.
Particularly, described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment;
Described Play Control comprises progress and regulates, plays and suspend or play stopping.
The second judgement operation described in present embodiment is actually prioritization scheme when comprising polytype order to control information, when command type is the adjustment of simple player attribute, then do not need to carry out the first follow-up Play Control judging operation and carry out according to the first judgement operation.
Step S7, carry out the first judgement operation from equipment, and judge that the judged result of operation performs Play Control scheme according to first,
Described first judges that operation specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for carrying out system time during the first judgement operation from equipment; T d0for from the current playing progress rate of equipment.
Particularly, in this step, described " judging that the judged result of operation performs Play Control scheme according to first " comprises again following several branch operation:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T from equipment at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control from equipment, and adjust VT by before the playing progress rate of equipment.
This step adopts to compare to be estimated playing progress rate, estimates that command execution moment and actual play progress, actual command perform magnitude relationship between the moment and compared with predetermined threshold value, in this, as the mode that foundation judges and adjusts, more accurate to the control of reproduction time, ensure that multiple device plays is synchronous to greatest extent.
Referring to Fig. 2, is the structural representation of many device synchronization broadcasting control system described in an embodiment of the present invention.Described system comprises main equipment 1 and at least one is from equipment 2, and described main equipment 1 comprises the first communication unit 11; Describedly comprise second communication unit 21, judging unit 22 and performance element 23 from equipment;
Described main equipment 1 is sent control information to from equipment by the first communication unit 21, and described control information comprises the playing progress rate T estimated when receiving control information from equipment c0with expectation command execution moment T c2;
Described main equipment also comprises computing unit 12; Described intended recipient moment T c2system time T when being sent control information according to main equipment 1 by computing unit 12 c1with information transmission time VT mcalculate;
Playing progress rate T when described expectation receives control information from equipment 2 c0playing progress rate T when being sent control information according to main equipment 1 by computing unit 12 d1with information transmission time VT mcalculate." playing progress rate " described in present embodiment all refers to the broadcasting process to a certain playing task on equipment, can represent with the time point on its reproduction time axle, if the beginning on reproduction time axle is considered as zero point, then on time shaft one can determine numeric representation playing progress rate, the essence of playing progress rate is a time information relevant to reproduction time axle.
The described control information receiving autonomous device 1 from equipment 2 by second communication unit 21, described judging unit 22 carries out the first judgement operation, according to first, described performance element 23 judges that the judged result of operation performs Play Control scheme.Particularly, according to first, described performance element 23 judges that the judged result of operation performs Play Control scheme and comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control, and adjust VT by before the playing progress rate of equipment.
Herein, adopt to compare from equipment 2 and estimate playing progress rate, estimate that command execution moment and actual play progress, actual command perform magnitude relationship between the moment and compared with predetermined threshold value, in this, as the mode that foundation judges and adjusts, more accurate to the control of reproduction time, ensure that multiple device plays is synchronous to greatest extent.
The first judgement operation that described judging unit 22 carries out specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for carrying out system time during the first judgement operation from equipment; T d0for from the current playing progress rate of equipment.
When also comprising command type in described control information (described command type comprises Play Control or player attribute regulates), after the control information receiving autonomous device 1 from equipment 2 by second communication unit 21 and before described judging unit 22 carries out the first judgement operation, described judging unit 22 also carries out one second and judges operation, and described second judges that operation specifically comprises:
Judge play command type, when judging play command type as Play Control, judging unit 22 carries out the first judgement operation, and when judging that play command type regulates as player attribute, performance element 23 directly performs the adjusting command of described player attribute.Described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment; Described Play Control comprises progress and regulates, plays and suspend or play stopping.Herein, the the second judgement operation carried out from equipment 2 is actually prioritization scheme when comprising polytype order to control information, when command type is the adjustment of simple player attribute, then do not need to carry out the first follow-up Play Control judging operation and carry out according to the first judgement operation.
In some embodiments, main equipment 1 by the first communication unit 11 to the network environment test also comprising preset times before sending control information from equipment 2, described network environment test specifically comprises: main equipment 1 sends detecting information by the first communication unit 11 to from equipment 2, response message is returned by second communication unit 21 to main equipment 1 immediately after equipment 2 receives described detecting information, the computing unit 12 of main equipment 1 tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as information transmission time VT using repeatedly network environment m.The Main Function of network environment testing procedure obtains network state and then the estimated information transmission time receives orders or exectorial moment point from equipment 2 for inferring, also can adopt in other embodiments unactual carry out information transmission mode and simply the information transmission time is inferred or estimates.
In some embodiments, main equipment 1 with carry out repeatedly time synchronized by the first communication unit 11 and second communication unit 21 with predeterminated frequency from equipment 2 and operate guarantee main equipment 1 and from equipment 2, there is consistent system time.
Refer to Fig. 3 and Fig. 4, be respectively the structural representation of many device synchronization playback control device described in an embodiment of the present invention and many device synchronization Play Control terminal;
Described many device synchronization playback control device comprises the first communication unit 11, and described equipment is sent control information to terminal by the first communication unit 11, and described control information comprises playing progress rate T when anticipated terminal receives control information c0with expectation command execution moment T c2.
Further, described many device synchronization playback control device also comprises computing unit 12; Described intended recipient moment T c2system time T when being sent control information according to equipment by computing unit 12 c1with information transmission time VT mcalculate;
Described anticipated terminal receives playing progress rate T during control information c0playing progress rate T when being sent control information according to equipment by computing unit 12 d1with information transmission time VT mcalculate.
Described many device synchronization Play Control terminal comprises second communication unit 21, judging unit 22 and performance element 23;
Described terminal receives the control information from control appliance by second communication unit 21, and described judging unit 22 carries out the first judgement operation, according to first, described performance element 23 judges that the judged result of operation performs Play Control scheme,
The first judgement operation that described judging unit 2 carries out specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for described terminal carries out system time when the first judgement operates; T d0for the current playing progress rate of described terminal.
Further, in described many device synchronization Play Control terminal, according to first, described performance element 23 judges that the judged result of operation performs Play Control scheme and specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control, and adjust VT by before the playing progress rate of equipment.
Particularly, described many device synchronization playback control device and many device synchronization Play Control terminal play scheme by realizing many device synchronization with under type associated working:
Step S1, equipment and terminal are connected by the first communication unit 11 and second communication unit 21;
Wherein equipment refers to start to control the equipment making of and play the effect of NTP time server in the system that the equipment of multiple synchronous playing task forms.Terminal refers at least one system formed at the equipment of multiple synchronous playing task by the terminal that equipment regulation and control are play.Described connection can be wired connection or wireless connections, sets up certain annexation smooth and easy the stablizing of follow-up reciprocal process can be made to carry out between equipment and terminal.
Step S2, network environment are tested;
After equipment and terminal networking, equipment is leading carries out network environment test, namely detecting information is sent by equipment to terminal, terminal returns response message to equipment after receiving described detecting information immediately, and the computing unit 12 in equipment tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as the information transmission time using repeatedly network environment.The Main Function of network environment testing procedure obtains network state and then the estimated information transmission time receives orders or exectorial moment point for inferring terminal, in other embodiments equipment also can adopt unactual carry out information transmission mode and simply the information transmission time is inferred or estimates.
Step S3, equipment and terminal carry out time synchronized operation;
Further, after first time synchronized operation, every prefixed time interval, equipment carries out a time synchronized again and operates with terminal, to guarantee the unlikely error occurring influence time levels of precision in system During Process of Long-term Operation.
Step S4, equipment send control information to terminal;
In this step, described control information comprises playing progress rate T when anticipated terminal receives control information c0with expectation command execution moment T c2;
Described intended recipient moment T c2system time T when being sent control information according to equipment by the computing unit 12 in equipment c1with information transmission time VT mcalculate;
Described anticipated terminal receives playing progress rate T during control information c0playing progress rate T when being sent control information according to equipment by the computing unit 12 in equipment d1with information transmission time VT mcalculate." playing progress rate " described in present embodiment all refers to the broadcasting process to a certain playing task in equipment or terminal, can represent with the time point on its reproduction time axle, if the beginning on reproduction time axle is considered as zero point, then on time shaft one can determine numeric representation playing progress rate, the essence of playing progress rate is a time information relevant to reproduction time axle.
Step S5, terminal receive from the control information of equipment, and carry out the second judgement by judging unit 22 and operate;
In this step, judging unit 22 carries out second judge to be operating as one can selection operation, perform during for also comprising command type in described control information.Described command type comprises Play Control or player attribute regulates.In other embodiments, as control information does not comprise command type, then do not perform described second and judge operation.
Described second judges that operation specifically comprises:
Judge play command type, when judging that play command type is as entering step S7 (carrying out the first judgement by judging unit 22 to operate) during Play Control, directly step S6 is performed by performance element 23, i.e. described player attribute adjusting command when judging that play command type regulates as player attribute.
Particularly, described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment;
Described Play Control comprises progress and regulates, plays and suspend or play stopping.
The second judgement undertaken by judging unit 22 described in present embodiment operates the prioritization scheme be actually when comprising polytype order to control information, when command type is the adjustment of simple player attribute, then do not need to carry out the first follow-up Play Control judging operation and carry out according to the first judgement operation.
The judging unit 22 of step S7, terminal carries out the first judgement operation, and judges that the judged result of operation performs Play Control scheme by performance element 23 according to first,
Described first judges that operation specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for terminal carries out system time when the first judgement operates; T d0for the current playing progress rate of terminal.
Particularly, in this step, described " according to first, performance element 23 judges that the judged result of operation performs Play Control scheme " comprises again following several branch operation:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, terminal is T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, terminal performs Play Control, and adjusts VT by before the playing progress rate of terminal.
This step adopts to compare to be estimated playing progress rate, estimates that command execution moment and actual play progress, actual command perform magnitude relationship between the moment and compared with predetermined threshold value, in this, as the mode that foundation judges and adjusts, more accurate to the control of reproduction time, ensure that the broadcasting of multiple playback terminal is synchronous or it is synchronous with the broadcasting of described equipment to greatest extent.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or terminal equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or terminal equipment.When not more restrictions, the key element limited by statement " comprising ... " or " comprising ... ", and be not precluded within process, method, article or the terminal equipment comprising described key element and also there is other key element.In addition, in this article, " be greater than ", " being less than ", " exceeding " etc. be interpreted as and do not comprise this number; " more than ", " below ", " within " etc. be interpreted as and comprise this number.
Those skilled in the art should understand, the various embodiments described above can be provided as method, device or computer program.These embodiments can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.The hardware that all or part of step in the method that the various embodiments described above relate to can carry out instruction relevant by program has come, described program can be stored in the storage medium that computer equipment can read, for performing all or part of step described in the various embodiments described above method.Described computer equipment, includes but not limited to: personal computer, server, all-purpose computer, special-purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, intelligent home device, wearable intelligent equipment, vehicle intelligent equipment etc.; Described storage medium, includes but not limited to: the storage of RAM, ROM, magnetic disc, tape, CD, flash memory, USB flash disk, portable hard drive, storage card, memory stick, the webserver, network cloud storage etc.
The various embodiments described above describe with reference to the flow chart of method, equipment (system) and computer program according to embodiment and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of computer equipment to produce a machine, making the instruction performed by the processor of computer equipment produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer equipment readable memory that works in a specific way of vectoring computer equipment, the instruction making to be stored in this computer equipment readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded on computer equipment, make to perform sequence of operations step on a computing device to produce computer implemented process, thus the instruction performed on a computing device is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although be described the various embodiments described above; but those skilled in the art are once obtain the basic creative concept of cicada; then can make other change and amendment to these embodiments; so the foregoing is only embodiments of the invention; not thereby scope of patent protection of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included within scope of patent protection of the present invention.

Claims (18)

1. the control method for playing back of device synchronization more than, comprises step:
Main equipment sends control information to from equipment, and described control information comprises the playing progress rate T estimated when receiving control information from equipment c0with expectation command execution moment T c2;
Receive the control information of autonomous device from equipment, carry out the first judgement operation, and judge that the judged result of operation performs Play Control scheme according to first,
Described first judges that operation specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for carrying out system time during the first judgement operation from equipment; T d0for from the current playing progress rate of equipment.
2., in many device synchronization control method for playing back as claimed in claim 1, described " judging that the judged result of operation performs Play Control scheme according to first " specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T from equipment at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control from equipment, and adjust VT by before the playing progress rate of equipment.
3. in many device synchronization control method for playing back as claimed in claim 1 or 2, also comprise command type in described control information, described command type comprises Play Control or player attribute regulates;
Carry out the first judgement operation after receiving the control information of autonomous device from equipment and from equipment before, also carry out one second judge operation from equipment, described second judges that operation specifically comprises:
Judge play command type, when judging that play command type is as carrying out the first judgement operation during Play Control, when judging that play command type directly performs the adjusting command of described player attribute when regulating as player attribute.
4., in many device synchronization control method for playing back as claimed in claim 3, described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment;
Described Play Control comprises progress and regulates, plays and suspend or play stopping.
5. in many device synchronization control method for playing back as claimed in claim 1 or 2, described intended recipient moment T c2system time T when being sent control information according to main equipment by main equipment c1with information transmission time VT mcalculate;
Playing progress rate T when described expectation receives control information from equipment c0playing progress rate T when being sent control information according to main equipment by main equipment d1with information transmission time VT mcalculate.
6. in many device synchronization control method for playing back as claimed in claim 5, main equipment is to the network environment test also comprising preset times before sending control information from equipment, described network environment test specifically comprises: main equipment sends detecting information to from equipment, after equipment receives described detecting information, return response message immediately to main equipment, main equipment tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as information transmission time VT using repeatedly network environment m.
7. in many device synchronization control method for playing back as claimed in claim 1 or 2, main equipment with from equipment with predeterminated frequency carry out repeatedly time synchronized operate with guarantee main equipment with from equipment, there is consistent system time.
8. the broadcasting control system of device synchronization more than, comprises main equipment and at least one from equipment;
Described main equipment comprises the first communication unit; Describedly comprise second communication unit, judging unit and performance element from equipment;
Described main equipment is sent control information to from equipment by the first communication unit, and described control information comprises the playing progress rate T estimated when receiving control information from equipment c0with expectation command execution moment T c2;
The described control information receiving autonomous device from equipment by second communication unit, described judging unit carries out the first judgement operation, according to first, described performance element judges that the judged result of operation performs Play Control scheme,
The first judgement operation that described judging unit carries out specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for carrying out system time during the first judgement operation from equipment; T d0for from the current playing progress rate of equipment.
9., in many device synchronization broadcasting control system as claimed in claim 8, according to first, described performance element judges that the judged result of operation performs Play Control scheme and specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control, and adjust VT by before the playing progress rate of equipment.
10. in many device synchronization broadcasting control system as claimed in claim 8 or 9, also comprise command type in described control information, described command type comprises Play Control or player attribute regulates;
After the control information receiving autonomous device from equipment by second communication unit and before described judging unit carries out the first judgement operation, described judging unit also carries out one second and judges operation, and described second judges that operation specifically comprises:
Judge play command type, when judging play command type as Play Control, judging unit carries out the first judgement operation, and when judging that play command type regulates as player attribute, performance element directly performs the adjusting command of described player attribute.
In 11. many device synchronization broadcasting control systems as claimed in claim 10, described player attribute regulates and comprises brightness regulation, volume adjusting or contrast adjustment;
Described Play Control comprises progress and regulates, plays and suspend or play stopping.
In 12. many device synchronization broadcasting control systems as claimed in claim 8 or 9, described main equipment also comprises computing unit;
Described intended recipient moment T c2system time T when being sent control information according to main equipment by computing unit c1with information transmission time VT mcalculate;
Playing progress rate T when described expectation receives control information from equipment c0playing progress rate T when being sent control information according to main equipment by computing unit d1with information transmission time VT mcalculate.
In 13. many device synchronization broadcasting control systems as claimed in claim 12, main equipment by the first communication unit to the network environment test also comprising preset times before sending control information from equipment, described network environment test specifically comprises: main equipment sends detecting information by the first communication unit to from equipment, response message is returned by second communication unit to main equipment immediately after equipment receives described detecting information, the computing unit of main equipment tests the response message time of reception and the maximum difference of detecting information delivery time or the average of difference that obtain as information transmission time VT using repeatedly network environment m.
In 14. many device synchronization broadcasting control systems as claimed in claim 8 or 9, main equipment with carry out repeatedly time synchronized by the first communication unit and second communication unit with predeterminated frequency from equipment and operate guarantee main equipment and from equipment, there is consistent system time.
Device synchronization playback control device more than 15. 1 kinds, comprises the first communication unit, and described equipment is sent control information to terminal by the first communication unit, and described control information comprises playing progress rate T when anticipated terminal receives control information c0with expectation command execution moment T c2.
In 16. many device synchronization playback control devices as claimed in claim 15, also comprise computing unit;
Described intended recipient moment T c2system time T when being sent control information according to equipment by computing unit c1with information transmission time VT mcalculate;
Described anticipated terminal receives playing progress rate T during control information c0playing progress rate T when being sent control information according to equipment by computing unit d1with information transmission time VT mcalculate.
The terminal of device synchronization Play Control more than 17. 1 kinds, comprises second communication unit, judging unit and performance element;
Described terminal receives the control information from control appliance by second communication unit, and described judging unit carries out the first judgement operation, according to first, described performance element judges that the judged result of operation performs Play Control scheme,
The first judgement operation that described judging unit carries out specifically comprises: calculate VT=(T d2-T c2)-(T d0-T c0) and compare | the size of VT| and default very first time threshold value T1, wherein: T d2for described terminal carries out system time when the first judgement operates; T d0for the current playing progress rate of described terminal.
In 18. many device synchronization Play Control terminals as claimed in claim 17, according to first, described performance element judges that the judged result of operation performs Play Control scheme and specifically comprises:
When | during VT|≤T1, perform Play Control immediately;
As | VT| > T1 and VT 0during < 0, be T at system time c2shi Zhihang Play Control;
As | VT|>T1 and VT 0during > 0, perform Play Control, and adjust VT by before the playing progress rate of equipment.
CN201510069221.9A 2015-02-10 2015-02-10 Method, device, terminal and system for controlling synchronous playing of multiple devices Pending CN104602037A (en)

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CN107710771A (en) * 2016-02-29 2018-02-16 乐威指南公司 For the system and method that synchronized multimedia assets are reset in multiple equipment
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CN105516783A (en) * 2015-12-10 2016-04-20 广东欧珀移动通信有限公司 Multimedia content playing course control method and user terminal
CN105657511A (en) * 2015-12-29 2016-06-08 广州视源电子科技股份有限公司 Method and device for synchronously displaying images
CN105657511B (en) * 2015-12-29 2019-03-26 广州视源电子科技股份有限公司 Image synchronous display method and device
CN105791504A (en) * 2016-01-26 2016-07-20 青岛海信移动通信技术股份有限公司 Incoming call processing method and terminal
CN105791504B (en) * 2016-01-26 2019-02-15 青岛海信移动通信技术股份有限公司 Processing incoming call and terminal
CN107710771A (en) * 2016-02-29 2018-02-16 乐威指南公司 For the system and method that synchronized multimedia assets are reset in multiple equipment
CN107239253A (en) * 2016-03-29 2017-10-10 扬智科技股份有限公司 The WLAN player of synchronous broadcasting speed, system and method
CN107239253B (en) * 2016-03-29 2020-05-12 扬智科技股份有限公司 Wireless local area network player, system and method for synchronizing playing speed
CN106488289A (en) * 2016-10-08 2017-03-08 广东欧珀移动通信有限公司 Audio sync player method, apparatus and system
CN106488289B (en) * 2016-10-08 2019-07-16 Oppo广东移动通信有限公司 Audio sync playback method, apparatus and system
CN106412665A (en) * 2016-10-18 2017-02-15 北京小米移动软件有限公司 Synchronous playing control method, device and system for multimedia
WO2018086481A1 (en) * 2016-11-11 2018-05-17 传线网络科技（上海）有限公司 Play control method and device
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CN108055564A (en) * 2017-12-20 2018-05-18 广州小百合信息技术有限公司 Multiple playback terminal broadcasting content synchronous broadcast methods and system
CN108055564B (en) * 2017-12-20 2020-09-15 广州朗国电子科技有限公司 Method and system for synchronously playing played contents of multiple playing terminals
CN108540830A (en) * 2018-04-13 2018-09-14 青岛海信电器股份有限公司 A kind of more playback equipment synchronous broadcast methods, system and terminal
CN113055728A (en) * 2021-03-31 2021-06-29 海信电子科技(武汉)有限公司 Multi-device synchronous playing method and display device
CN114143584A (en) * 2021-09-29 2022-03-04 杭州当虹科技股份有限公司 Broadcasting system and method for realizing synchronous broadcasting among multiple terminals
CN114143584B (en) * 2021-09-29 2024-03-26 杭州当虹科技股份有限公司 Broadcasting system and method for realizing synchronous broadcasting among multiple terminals
CN117544640A (en) * 2023-12-05 2024-02-09 中移互联网有限公司 Method, device and system for synchronizing behaviors of multiple devices in local area network and electronic device

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