CN104243850A - Synchronous medium playing method - Google Patents
Synchronous medium playing method Download PDFInfo
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- CN104243850A CN104243850A CN201410469223.2A CN201410469223A CN104243850A CN 104243850 A CN104243850 A CN 104243850A CN 201410469223 A CN201410469223 A CN 201410469223A CN 104243850 A CN104243850 A CN 104243850A
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Abstract
The invention provides a synchronous medium playing method. The synchronous medium playing method comprises the following steps that a first medium clip is played by an intrinsic device and transmitted to an external device; when the external device plays the first medium clip, the intrinsic device starts a reception unit or an image capturing unit so that the first medium clip played by the external device can be received; the intrinsic device calculates a time difference between the time the external device plays the first medium clip and the time the intrinsic device plays the first medium clip; the intrinsic device transmits a second medium clip to the external device; the intrinsic device and the external device synchronously play the second medium clip according to the time difference.
Description
Technical field
The invention relates to a kind of data sharing method, and relate to a kind of method that data synchronously plays especially.
Background technology
Along with popularizing of running gear, the application such as Wi-Fi transmission or cloud service are inseparable with the daily life of most people.In order to the interaction promoted between running gear and other devices links, Wireless LAN alliance (Wi-Fi Alliance) proposes wirelessly to carry out the audio-visual technology Miracast that shares or Wi-Fi Display.
In Miracast specification, video-audio playing device is divided into two classes, a class is called transmission end (source), is another kind ofly called receiving terminal (sink).Receiving terminal is divided into again main receiving terminal (primary sink) and secondary receiving terminal (secondary sink), and difference is that main receiving terminal can support that the data of image or sound exports, and secondary receiving terminal only supports that the data of sound exports.After the device at two ends establishes radio connecting, the coordination of functions of the equipments and networking condition can be carried out, to select the audio-visual transformat be applicable to, and set up the wire protocol (session) of audio-visual crossfire, to control broadcasting and the termination of a series of audio-visual crossfire.
Therefore, the device at two ends plays identical audiovisual materials by above-mentioned audio-visual technology of sharing, but audiovisual materials have transmission delay (propagation delay), so that audiovisual materials cannot synchronously be play after the data process such as a series of compression, encryption, deciphering and decompression.
Summary of the invention
The invention relates to a kind of method that data is synchronously play, by differing from computing time and revising the time-histories play according to the time difference, synchronously can play data with the device reaching two ends.
According to the present invention on the one hand, propose a kind of method that data is synchronously play, comprise the following steps.This part device plays the first media fragment, and transmits the first media fragment to external device (ED).When the first media fragment play by external device (ED), this part device opens radio unit or image acquisition unit, to receive the first media fragment that external device (ED) is play.This part device calculates external device (ED) and plays time difference when the first media fragment and this part device play the first media fragment.This part device transmits the second media fragment to external device (ED).This part device and external device (ED) synchronously play the second media fragment according to the time difference calculated.
Preferably, this this this part device of this part device comparison plays the time point that this sound information of this first media fragment play by the sound information of this first media fragment and this external device (ED), calculates this time difference.
Preferably, this this this part device of this part device comparison plays the time point that this image information of this first media fragment play by the image information of this first media fragment and this external device (ED), calculates this time difference.
Preferably, when this this part device transmits this first media fragment to this external device (ED), also comprise encryption Timing information in this first media fragment, and this this part device receive this external device (ED) play this first media fragment time, also comprise this Timing information of deciphering, and calculate this time difference according to this Timing information.
Preferably, this the first media fragment play by this external device (ED), and this this part device is just when play buffering media fragment, this this part device according to this buffer media fragment of this time difference repeat playing at least one times, until this second data fragment media fragment play by this external device (ED), before wherein this second data fragment media fragment play by this external device (ED), the method that this data is synchronously play also comprises:
This this part device transmits another buffer media fragment to this external device (ED);
It is poor that this this part device recalculates the buffer time that this external device (ED) plays when this another buffer media fragment and this this part device play this another buffer media fragment; And
This this part device plays this another buffer media fragment at least one times, until this second data fragment media fragment play by this external device (ED) according to this buffer time difference.
Preferably, this this part device also comprises after calculating this time difference:
This this part device transmission package contains the information of this time difference to this external device (ED), and transmit buffering data fragment is to this external device (ED);
It is poor that this this part device recalculates the buffer time that this external device (ED) plays when this buffer media fragment and this this part device play this buffer media fragment;
This this part device transmission package contains the information of this buffer time difference to this external device (ED); And
This external device (ED) plays this second media fragment according to this buffer time difference.
According to a further aspect of the invention, propose a kind of method that data is synchronously play, comprise the following steps.This part device plays the first media fragment, and transmits the first media fragment to external device (ED).When this part device plays the first media fragment, radio unit opened by external device (ED), to receive the first media fragment that this part device is play.External device (ED) calculates external device (ED) and plays time difference when the first media fragment and this part device play the first media fragment.External device (ED) transmission package contains the information of time difference to this part device.This part device transmits the second media fragment to external device (ED).This part device and external device (ED) synchronously play the second media fragment according to the time difference.
Preferably, when this this part device transmits this first media fragment to this external device (ED), also comprise encryption Timing information in this first media fragment, and this external device (ED) receive this this part device play this first media fragment time, also comprise this Timing information of deciphering, and calculate this time difference according to this Timing information.
Preferably, this the first media fragment play by this external device (ED), and this this part device is just when play buffering media fragment, this this part device according to this buffer media fragment of this time difference repeat playing at least one times, until this second media fragment play by this external device (ED), before wherein this second data fragment media fragment play by this external device (ED), the method that this data is synchronously play also comprises:
This external device (ED) receives this buffer media fragment that this this part device is play;
It is poor that this external device (ED) recalculates the buffer time that this external device (ED) plays when this buffer media fragment and this this part device play this buffer media fragment;
This external device (ED) transmission package contains the information of this buffer time difference to this this part device; And
This this part device plays another buffer media fragment at least one times, until this second data fragment media fragment play by this external device (ED) according to this buffer time difference.
Preferably, this external device (ED) also comprises after calculating this time difference:
This this part device transmit buffering media fragment is to this external device (ED);
It is poor that this external device (ED) recalculates the buffer time that this external device (ED) plays when this buffer media fragment and this this part device play this buffer media fragment; And
This external device (ED) plays this second media fragment according to this buffer time difference.
Compare with prior art, the present invention plays the time difference of very first time fragment by first calculating this part device and external device (ED), and adjust according to time difference of calculating the time-histories that this part device or external device (ED) play, reach the object that data finally synchronously play by this part device and external device (ED).It does not need the calculation process or the transfer protocol that increase additional complexity, is applicable to, on any existing audio-visual playing device shared, use more convenient.
In order to have better understanding to above-mentioned and other aspect of the present invention, preferred embodiment cited below particularly, and coordinating institute's accompanying drawings, being described in detail below:
Accompanying drawing explanation
Fig. 1 illustrates the flow chart of the method that the data according to one embodiment of the invention is synchronously play.
Fig. 2 A to Fig. 2 D illustrates the equipment schematic diagram that data is synchronously play.
Fig. 3 illustrates the sequential chart before synchronously playing according to the data shown in Fig. 1.
Fig. 4 illustrates the sequential chart of the first embodiment synchronously play according to the data shown in Fig. 1.
Fig. 5 illustrates the sequential chart of the second embodiment synchronously play according to the data shown in Fig. 1 of the present invention.
Fig. 6 illustrates the sequential chart of the 3rd embodiment synchronously play according to the data shown in Fig. 1 of the present invention.
Fig. 7 illustrates the sequential chart of the 4th embodiment synchronously play according to the data shown in Fig. 1 of the present invention.
Fig. 8 illustrates the flow chart of the method that the data according to another embodiment of the present invention is synchronously play.
Fig. 9 illustrates the sequential chart of the 5th embodiment synchronously play according to the data shown in Fig. 8.
Figure 10 illustrates the sequential chart of the 6th embodiment synchronously play according to the data shown in Fig. 8.
Embodiment
In the example of the present embodiment, propose a kind of method that data is synchronously play, can be applicable to the data transmission on TV, machine between the electronic product such as box, projector, smart mobile phone, board device and notebook computer and synchronously play.Wherein, arbitrary device as the transmission end of data transmission, can be referred to as this part device in the present case; And arbitrary device as the receiving terminal of the data of reception, can be referred to as external device (ED) in the present case.In one embodiment, this part device can be smart mobile phone or board device, and external device (ED) can be TV or projector.In addition, this part device can be smart mobile phone, and external device (ED) can be board device etc., and the present invention is not limited this.This method, by Wireless LAN data transmission, can also pass through wired networking (cable) data transmission.User can be allowed to exempt connection wire and transducer worry diversified in specifications by wireless technology of sharing, interoperability is higher, the multimedia documents such as picture, word, sound and image can be shared between different device.Wireless technology of sharing known at present has air play, WiDi, WiGig, WHDI, MirrorLink and Miracast etc.
Below propose embodiment to be described in detail, embodiment only in order to illustrate as example, and is not used to the scope of limit the present invention for protection.
First embodiment
Referring to Fig. 1 and Fig. 2 A to Fig. 2 D, wherein Fig. 1 illustrates the flow chart of the method that the data according to one embodiment of the invention is synchronously play, and Fig. 2 A to Fig. 2 D illustrates the equipment schematic diagram that data is synchronously play.In step s 110, this part device 100 plays the first media fragment, and transmits the first media fragment to external device (ED) 102.As Fig. 2 A, when this part device 100 plays media fragment " A ", external device (ED) 102 cannot play media fragment " A " immediately because of transmission delay.
In the step s 120, when the first media fragment play by external device (ED) 102, this part device 100 opens radio unit or image acquisition unit, to receive the first media fragment that external device (ED) 102 is play.As Fig. 2 B, when external device (ED) 102 plays media fragment " A ", this part device 100 receives the media fragment of external device (ED) 102 broadcasting by microphone (not illustrating) or video camera (not illustrating), now, this part device 100 is playing another media fragment " B ", and therefore this part device 100 not yet synchronously plays data with external device (ED) 102.
In step s 130, which, to play computing time when the first media fragment and this part device 100 play the first media fragment according to external device (ED) 102 poor for this part device 100.The calculating of associated time difference, please refer to Fig. 3 to Fig. 7, illustrates after a while again.
In step S140, this part device 100 transmits the second media fragment to external device (ED) 102.In step S150, this part device 100 and external device (ED) 102 synchronously play the second media fragment according to the time difference.As Fig. 2 C, after the time difference that this part device 100 and external device (ED) 102 produce because of transmission delay is calculated, this part device 100 revises the time-histories play according to the time difference, such as this part device 100 repeat playing media fragment " B " at least one times, until media fragment " B " play by external device (ED) 102.Or as Fig. 2 D, the time-histories play revised by external device (ED) 102 according to the time difference, such as external device (ED) 102 is skipped and is play media fragment " B ", play-overs the media fragment " C " that this part device 100 is being play.
Please refer to Fig. 3, be the sequential chart before synchronously playing according to the data shown in Fig. 1, the transverse axis of its coordinate represents the time point that each media fragment C1 ~ C4 plays, and the longitudinal axis represents the order that each media fragment C1 ~ C4 plays on differing devices.Arbitrary media fragment C1 ~ C4 can as the first media fragment of this part device 100 difference computing time, such as calculate external device (ED) 102 and play time point when media fragment C1 and this part device 100 play media fragment C1, with computing time poor (Tshift=Tc3-Tc1).
Then, please refer to Fig. 4, is the sequential chart of the first embodiment synchronously play according to the data shown in Fig. 1.As shown in Figure 4, after the time difference (Tshift=Tc3-Tc1) is calculated, this part device 100 replays the media fragment C2 be positioned on time point Tc2 on next time point Tc4 according to the time difference, the rest may be inferred, this part device 100 can be modified to the media fragment play on next time point and be arranged on comparatively early time point, to make this part device 100 broadcasting data synchronous with external device (ED) 102 according to the time difference.
In addition, for reaching the object of synchronous broadcasting data, also can refer to shown in Fig. 5, after the time difference (Tshift=Tc3-Tc1) is calculated, this part device 100 replays according to the time difference and is positioned at media fragment C3 on time point Tc3 at least one times on next time point Tc4, to reduce the time difference that this part device 100 and external device (ED) 102 are play, and the data quantity of buffering can be reduced.That is, when the first media fragment (such as media fragment C1) play by external device (ED) 102, and this part device 100 is just when play buffering media fragment (such as media fragment C3), this part device 100 according to time difference repeat playing buffer media fragment at least one times, to reduce the time difference that this part device 100 and external device (ED) 102 are play.
In addition, in Figure 5, when this part device 100 according to time difference (Tshift=Tc3-Tc1) repeat playing buffer media fragment once after, if when still having the time difference between this part device 100 and external device (ED) 102, this part device 100 also can recalculate external device (ED) 102 and play buffer time poor (Tshift=Tc6-Tc5) when another buffer media fragment (such as media fragment C4) and this part device 100 play this another buffer media fragment (such as media fragment C4).Now, this part device 100 replays according to buffer time difference and is positioned at buffer media fragment (such as media fragment C5) on time point Tc6 at least one times on next time point Tc7, to reduce the time difference that this part device 100 and external device (ED) 102 are play.If when still having the time difference between this part device 100 and external device (ED) 102, repeat above-mentioned step, until this part device 100 broadcasting data synchronous with external device (ED) 102.
In one embodiment, above-mentioned media fragment C1 ~ C5 can comprise sound information or sound/image information respectively.This part device 100 captures the sound information of arbitrary media fragment C1 ~ C5, for comparison by radio unit.Therefore, this part device 100 can play via this part device of comparison 100 time point that the sound information of the first media fragment play by the sound information of the first media fragment and external device (ED) 102, and computing time is poor.
In another embodiment, above-mentioned media fragment C1 ~ C5 can comprise image information or sound/image information respectively.This part device 100 captures the image information of arbitrary media fragment C1 ~ C5, for comparison by image acquisition unit.Therefore, this part device 100 can play via this part device of comparison 100 time point that the image information of the first media fragment play by the image information of the first media fragment and external device (ED) 102, and computing time is poor.
In another embodiment, above-mentioned media fragment C1 ~ C5 can comprise Timing information respectively.When this part device 100 transmits arbitrary media fragment C1 ~ C5 to external device (ED) 102, Timing information is encrypted in each media fragment C1 ~ C5 by ciphering unit by this part device 100.In addition, when this part device 100 receives arbitrary media fragment C1 ~ C5 of external device (ED) 102 broadcasting, this part device 100 deciphers Timing information by decryption unit from arbitrary media fragment C1 ~ C5, to learn the sequential that media fragment C1 ~ C5 plays, for comparison.Therefore, this part device 100 can be poor for computing time according to Timing information.
Above-mentioned Timing information encryption technology can add coding information in sound information or sound/image information, and transfers to external device (ED) 102 in company with sound information or sound/image information.When external device (ED) 102 plays sound information or sound/image information, this coding information cannot the high-frequency signals of identification send with people's ear, for this part device 100 identification Timing information exactly.So, when external device (ED) 102 is when playing sound information or the sound/image information of media fragment, people's ear can not receive this high-frequency signals, but the radio unit of this part device 100 still can receive this high-frequency signals, poor with computing time.Meanwhile, sound information and Timing information occur between signal interference when transmitting can be avoided.
Please refer to Fig. 6, illustrate the sequential chart of the 3rd embodiment synchronously play according to the data shown in Fig. 1 of the present invention.Concrete with reference to Fig. 6, after the time difference (Tshift=Tc3-Tc1) is calculated, this part device 100 more transmission package can contain the information of time difference to external device (ED) 102.The time-histories play revised by external device (ED) 102 according to the time difference, such as external device (ED) 102 will play media fragment C2 originally on next time point Tc4, but learn that this part device 100 will play media fragment C4 on next time point Tc4 according to the time difference, therefore external device (ED) 102 is skipped and is play media fragment C2 and C3, play-overs the media fragment C4 (i.e. the second media fragment) that this part device 100 to be ready playing.Therefore, this part device 100 and external device (ED) 102 synchronously can play data.
Then, please refer to Fig. 7, is the sequential chart of the 4th embodiment synchronously play according to the data shown in Fig. 1 of the present invention.As shown in Figure 7, after the time difference (Tshift=Tc3-Tc1) is calculated, this part device 100 transmission package contains the information of time difference to external device (ED) 102.Now, external device (ED) 102 is skipped according to the time difference and is play media fragment C2, directly play buffering media fragment C3 on next time point Tc4, to reduce the time difference that this part device 100 and external device (ED) 102 are play, and can reduce the data quantity of buffering.If when still having the time difference between this part device 100 and external device (ED) 102, this part device 100 also can recalculate the buffer time poor (Tshift=Tc5-Tc4) when external device (ED) 102 play buffering media fragment (such as media fragment C4) and this part device 100 play this buffer media fragment (such as media fragment C4).Then, this part device 100 transmission package contains the information of buffer time difference to external device (ED) 102.Now, external device (ED) 102 is skipped according to buffer time difference and is play media fragment C5, play-overs another media fragment C6 that this part device 100 to be ready playing.If when still having the time difference between this part device 100 and external device (ED) 102, repeat above-mentioned step, until this part device 100 broadcasting data synchronous with external device (ED) 102.
Second embodiment
Please refer to Fig. 8, it illustrates the flow chart of the method that the data according to another embodiment of the present invention is synchronously play.Step S110, S140, S150 of step S210, S240, S250 and the first embodiment are identical, the present embodiment and the first embodiment difference are, in step S220, when this this part device 100 plays this first media fragment, radio unit opened by external device (ED) 102, to receive the first media fragment that this part device 100 is play, such as external device (ED) 102 receives the first media fragment of this part device 100 broadcasting by microphone (not illustrating).In step S230, this external device (ED) 102 calculates this external device (ED) 102 and plays time difference when this first media fragment and this this part device 100 play this first media fragment, and transmission package containing the information of this time difference to this this part device 100.
The calculating of associated time difference, please refer to Fig. 9 and Figure 10, describes in detail more after a while.In one embodiment, media fragment C1 ~ C5 can comprise sound information or sound/image information respectively.External device (ED) 102 captures the sound information of arbitrary media fragment C1 ~ C5, for comparison by radio unit.Therefore, this part device 100 can play via this part device of comparison 100 time point that the sound information of the first media fragment play by the sound information of the first media fragment and external device (ED) 102, and computing time is poor.
In another embodiment, above-mentioned media fragment C1 ~ C5 can comprise image information or sound/image information respectively.External device (ED) 102 captures the image information of arbitrary media fragment C1 ~ C5, for comparison by image acquisition unit.Therefore, external device (ED) 102 can play via this part device of comparison 100 time point that the image information of the first media fragment play by the image information of the first media fragment and external device (ED) 102, and computing time is poor.
In another embodiment, above-mentioned media fragment C1 ~ C5 can comprise Timing information respectively.When this part device 100 transmits arbitrary media fragment C1 ~ C5 to external device (ED) 102, Timing information is encrypted in each media fragment C1 ~ C5 by ciphering unit by this part device 100.In addition, when external device (ED) 102 receives arbitrary media fragment C1 ~ C5 of this part device 100 broadcasting, external device (ED) 102 deciphers Timing information by decryption unit from arbitrary media fragment C1 ~ C5, to learn the sequential that media fragment C1 ~ C5 plays, for comparison.Therefore, this part device 100 can be poor for computing time according to Timing information.
Above-mentioned Timing information encryption technology can add coding information in sound information or sound/image information, and transfers to external device (ED) 102 in company with sound information or sound/image information.When this part device 100 plays sound information or sound/image information, this coding information cannot the high-frequency signals of identification send with people's ear, for external device (ED) 102 identification Timing information exactly.So, when this part device 100 is when playing sound information or the sound/image information of media fragment, people's ear can not receive this high-frequency signals, but the radio unit of external device (ED) 102 still can receive this high-frequency signals, poor with computing time.Meanwhile, sound information and Timing information occur between signal interference when transmitting can be avoided.
Please refer to Fig. 9, after the time difference (Tshift=Tc3-Tc1) is calculated, external device (ED) 102 transmission package contains the information of time difference to this part device 100.This part device 100 revises the time-histories play according to the time difference, such as this part device 100 will play media fragment C4 originally on next time point Tc4, but learns that external device (ED) 102 will play media fragment C2 on next time point Tc4 according to the time difference.Therefore, this part device 100 replays the media fragment C2 be positioned on time point Tc2 on next time point Tc4 according to the time difference, to make this part device 100 broadcasting data synchronous with external device (ED) 102.
In addition, please refer to Figure 10, is the sequential chart of the 6th embodiment synchronously play according to the data shown in Fig. 8.As shown in Figure 10, after the time difference (Tshift=Tc3-Tc1) is calculated, external device (ED) 102 transmission package contains the information of time difference to this part device 100.Now, this part device 100 replays according to the time difference and is positioned at buffer media fragment C3 on time point Tc3 at least one times on next time point Tc4, to reduce the time difference that this part device 100 and external device (ED) 102 are play, and can reduce the data quantity cushioned.That is, when the first media fragment (such as media fragment C1) play by external device (ED) 102, and this part device 100 is just when play buffering media fragment (such as media fragment C3), this part device 100 according to time difference repeat playing buffer media fragment at least one times, to reduce the time difference that this part device 100 and external device (ED) 102 are play.
In addition, in Fig. 10, if when still having the time difference between this part device 100 and external device (ED) 102, external device (ED) 102 also can recalculate the buffer time poor (Tshift=Tc6-Tc5) when external device (ED) 102 play buffering media fragment (such as media fragment C4) and this part device 100 play this buffer media fragment (such as media fragment C4).Then, external device (ED) 102 transmission package contains the information of buffer time difference to this part device 100.Now, this part device 100 replays according to buffer time and is positioned at buffer media fragment (such as media fragment C5) on time point Tc6 at least one times on next time point Tc7, to reduce the time difference that this part device 100 and external device (ED) 102 are play.If when still having the time difference between this part device 100 and external device (ED) 102, repeat above-mentioned step, until this part device 100 broadcasting data synchronous with external device (ED) 102.
In the present embodiment, if the words that the cushion space of external device (ED) 102 is enough large, when can receive more media fragment ahead of time and store, also the mode as Fig. 6, Fig. 7 can be adopted to implement, it is poor for computing time with external device (ED) 102 that its difference is only in the present embodiment, instead of be transferred to external device (ED) 102 again after difference computing time by this part device 100.Therefore, external device (ED) 102 can play-over the second media fragment according to this time difference, plays data to make this part device 100 and external device (ED) 102 simultaneously.In addition, external device (ED) 102 also can play at least one buffer media fragment (such as media fragment C3, C4), to reduce the time difference according to the time difference.Then, buffer time of recalculating when this external device (ED) 102 play buffering media fragment (such as media fragment C4) and this this part device 100 play this buffer media fragment (such as media fragment C4) of external device (ED) 102 is poor.Now, external device (ED) 102 is skipped according to buffer time difference and is play media fragment C5, play-overs another media fragment C6 that this part device 100 to be ready playing.If when still having the time difference between this part device 100 and external device (ED) 102, repeat above-mentioned step, until this part device 100 broadcasting data synchronous with external device (ED) 102.
The method that data disclosed by the above embodiment of the present invention is synchronously play, it is time-histories that is poor by computing time and that play according to time difference correction, to reach this part device and external device (ED) synchronously plays data, do not need the calculation process or the transfer protocol that increase additional complexity, be applicable to, on any existing audio-visual playing device shared, use more convenient.
In sum, although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when doing various change and retouching.
Claims (10)
1. the method synchronously play of data, is characterized in that, comprising:
This part device plays the first media fragment, and transmits this first media fragment to external device (ED);
When this first media fragment play by this external device (ED), this this part device opens radio unit or image acquisition unit, to receive this first media fragment that this external device (ED) is play;
This this part device calculates this external device (ED) and plays time difference when this first media fragment and this this part device play this first media fragment;
This this part device transmits the second media fragment to this external device (ED); And
This this part device and this external device (ED) synchronously play this second media fragment according to this time difference.
2. the method synchronously play of data as claimed in claim 1, it is characterized in that, this this this part device of this part device comparison plays the time point that this sound information of this first media fragment play by the sound information of this first media fragment and this external device (ED), calculates this time difference.
3. the method synchronously play of data as claimed in claim 1, it is characterized in that, this this this part device of this part device comparison plays the time point that this image information of this first media fragment play by the image information of this first media fragment and this external device (ED), calculates this time difference.
4. the method synchronously play of data as claimed in claim 1, it is characterized in that, when this this part device transmits this first media fragment to this external device (ED), also comprise encryption Timing information in this first media fragment, and this this part device receive this external device (ED) play this first media fragment time, also comprise this Timing information of deciphering, and calculate this time difference according to this Timing information.
5. the method synchronously play of data as claimed in claim 1, it is characterized in that, this the first media fragment play by this external device (ED), and this this part device is just when play buffering media fragment, this this part device according to this buffer media fragment of this time difference repeat playing at least one times, until this second data fragment media fragment play by this external device (ED), before wherein this second data fragment media fragment play by this external device (ED), the method that this data is synchronously play also comprises:
This this part device transmits another buffer media fragment to this external device (ED);
It is poor that this this part device recalculates the buffer time that this external device (ED) plays when this another buffer media fragment and this this part device play this another buffer media fragment; And
This this part device plays this another buffer media fragment at least one times, until this second data fragment media fragment play by this external device (ED) according to this buffer time difference.
6. the method synchronously play of data as claimed in claim 1, it is characterized in that, this this part device also comprises after calculating this time difference:
This this part device transmission package contains the information of this time difference to this external device (ED), and transmit buffering data fragment is to this external device (ED);
It is poor that this this part device recalculates the buffer time that this external device (ED) plays when this buffer media fragment and this this part device play this buffer media fragment;
This this part device transmission package contains the information of this buffer time difference to this external device (ED); And
This external device (ED) plays this second media fragment according to this buffer time difference.
7. the method synchronously play of data, for this part device and external device (ED), is characterized in that, comprising:
This this part device plays the first media fragment, and transmits this first media fragment to this external device (ED);
When this this part device plays this first media fragment, radio unit opened by this external device (ED), to receive this first media fragment that this this part device is play;
This external device (ED) calculates this external device (ED) and plays time difference when this first media fragment and this this part device play this first media fragment;
This external device (ED) transmission package contains the information of this time difference to this this part device;
This this part device transmits the second media fragment to this external device (ED); And
This this part device and this external device (ED) synchronously play this second media fragment according to this time difference.
8. the method synchronously play of data as claimed in claim 7, it is characterized in that, when this this part device transmits this first media fragment to this external device (ED), also comprise encryption Timing information in this first media fragment, and this external device (ED) receive this this part device play this first media fragment time, also comprise this Timing information of deciphering, and calculate this time difference according to this Timing information.
9. the method synchronously play of data as claimed in claim 7, it is characterized in that, this the first media fragment play by this external device (ED), and this this part device is just when play buffering media fragment, this this part device according to this buffer media fragment of this time difference repeat playing at least one times, until this second media fragment play by this external device (ED), before wherein this second data fragment media fragment play by this external device (ED), the method that this data is synchronously play also comprises:
This external device (ED) receives this buffer media fragment that this this part device is play;
It is poor that this external device (ED) recalculates the buffer time that this external device (ED) plays when this buffer media fragment and this this part device play this buffer media fragment;
This external device (ED) transmission package contains the information of this buffer time difference to this this part device; And
This this part device plays another buffer media fragment at least one times, until this second data fragment media fragment play by this external device (ED) according to this buffer time difference.
10. the method synchronously play of data as claimed in claim 7, it is characterized in that, this external device (ED) also comprises after calculating this time difference:
This this part device transmit buffering media fragment is to this external device (ED);
It is poor that this external device (ED) recalculates the buffer time that this external device (ED) plays when this buffer media fragment and this this part device play this buffer media fragment; And
This external device (ED) plays this second media fragment according to this buffer time difference.
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