CN102905148A - Mobile terminals and method for playing 3-dimensional (3D) video by same - Google Patents
Mobile terminals and method for playing 3-dimensional (3D) video by same Download PDFInfo
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- CN102905148A CN102905148A CN2012103481292A CN201210348129A CN102905148A CN 102905148 A CN102905148 A CN 102905148A CN 2012103481292 A CN2012103481292 A CN 2012103481292A CN 201210348129 A CN201210348129 A CN 201210348129A CN 102905148 A CN102905148 A CN 102905148A
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Abstract
The invention discloses a method for playing 3-dimensional (3D) video by mobile terminals. The method includes that the two mobile terminals for playing the 3D video respectively obtain a left side video file and a right side video file of the 3D video. A main control mobile terminal of the two mobile terminals obtains clock difference between the main control mobile terminal and the other mobile terminal, determines the initial time for playing the left side video file and the right side video file by the two mobile terminals according to the clock difference and informs the other mobile terminal. The difference of the initial time for playing the left side video file and the right side video file by the two mobile terminals is identical with the clock difference, and the two mobile terminals respectively play the left side video file and the right side video file according to the determined initial time. The two mobile terminals are further disclosed. By means of the method and the mobile terminals, resolution rate, brightness and size of images can be maintained in playing of the 3D video, and video playing is easy to achieve.
Description
Technical field
The application relates to the 3D video technique, particularly the method for portable terminal and broadcast 3D video thereof.
Background technology
At present, video 3D technology has multiple implementation: polarization type, flash type and bore hole 3D.The below briefly introduces these different implementations and pluses and minuses separately thereof.
1) polarization type 3D
Polarization type 3D stereoscopic imaging technology is to utilize light to have the principle of " direction of vibration " to decompose original image, by placing Polarizer at display screen, can carry the different picture in two width of cloth polarization directions to the beholder.When picture when the polarising glass because every eyeglass of polarization type glasses can only be accepted the picture of a polarization direction, like this people about two just can receive two a series of paintings faces, pass through again brain compound stereoscopic image.But, because the employing of polarisation 3D technology is the optical spectroscopy image-forming principle, therefore screen resolution is reduced by half, be difficult to realize real full HD 3D image, and reduced the brightness of picture; Simultaneously, polarization type 3D technology is also higher for the requirement of screen.
2) flash type 3D
Flash type 3D realizes 3D effect by the refresh rate of picture.It is by being divided into two image frame by frame, form two a series of paintings faces of corresponding left eye and right eye, continuing to interweave shows, and Infrared Projector is controlled the left and right sides eyeglass switch of shutter type 3 D spectacles synchronously simultaneously, makes left and right sides eyes can see accurately respective picture constantly.This mode can keep the original resolution of picture, makes the user enjoy very like a cork real full HD 3D effect, and can not cause picture brightness to descend.But under the general situation, 3D LCD screen refresh rate must reach more than the 120Hz, namely allows images of left and right eyes all receive the image of frequency more than 60Hz, and the guarantee user sees the 3D rendering effect that continues and do not glitter.Simultaneously, shutter 3D technology is constantly to carry out the imaging that the high speed open/close state is realized the 3D stereopsis by eyeglass, therefore, will certainly cause the situation of watching for a long time film dizziness or eyes discomfort to occur to occur.
3) bore hole 3D
The major technique of bore hole 3D is optical barrier type and lens pillar.Optical barrier is because grating blocks, and the luminance loss is larger, and resolution also can decrease.Lens pillar and 2D screen technique are incompatible, and resolution also can reduce, and simultaneously, the picture fineness also can reduce.Therefore, bore hole 3D has relatively high expectations to Screen Technology, is not overripened at present.
4) observation mirror method
The observation mirror method need to show left and right sides image simultaneously on screen, utilize observation mirror with both sides image translation and coincidence.This method does not have the luminance loss, does not have resolution loss, more can not glimmer, and the glasses cost is low.But owing to need to show simultaneously two width of cloth images, the image size after therefore synthesizing only is half of screen size.
By foregoing as seen, the player method of these four kinds of 3D videos all has shortcoming separately, and perhaps resolution, brightness or the size of synthetic rear image all may have loss, and perhaps screen request is high-leveled and difficult to realize, perhaps brings visual fatigue to the user.
Summary of the invention
The application provides portable terminal and plays the method for 3D video, can keep image resolution ratio, brightness and size, the convenient realization.
A kind of method of mobile terminal playing 3D video comprises:
Two portable terminals that are used for broadcast 3D video obtain respectively the left and right sides video file of 3D video;
Master control acquisition for mobile terminal self in described two portable terminals and the clock difference between another portable terminal are determined that according to this clock difference described two portable terminals carry out the zero-time that the left and right sides video file is play, and are notified described another portable terminal; Wherein, the poor and described clock difference of the zero-time of described two described left and right sides video files of mobile terminal playing is identical;
Described two portable terminals carry out respectively the broadcast of left and right sides video file according to the zero-time of determining.
Preferably, the method further comprises: described master control mobile terminal period obtains the clock difference between self and another portable terminal, and sends to described another portable terminal; Described another portable terminal compares the poor clock difference of preserving with last time of the present clock that receives, when the two not simultaneously, play according to the poor video file to described another portable terminal of the present clock of described reception and to adjust.
Preferably, the clock difference between described master control acquisition for mobile terminal self and another portable terminal comprises:
Described master control portable terminal sends synchronization frame to described another portable terminal, and carries the temporal information timestamp1 when sending this synchronization frame;
Described another portable terminal receives described synchronization frame, record receives the temporal information timestamp2 of this synchronization frame, to described master control portable terminal feedback syn ack frame, and in this syn ack frame, carry described timestamp2 and the temporal information timestamp3 that sends the syn ack frame;
Described master control portable terminal receives described syn ack frame, and record receiving time information timestamp4; Calculate described clock difference Δ according to the described timestamp2 that carries in the described syn ack frame and timestamp3 and timestamp1 and timestamp4
Ts
Preferably, the transmission of described clock difference, synchronization frame and syn ack frame is undertaken by the mode of bluetooth, WiFi or wired connection.
Preferably, described two portable terminals left and right sides video file of obtaining respectively the 3D video comprises:
The left and right sides video file is pre-stored on described two portable terminals;
Perhaps,
With left and right sides video file pre-save on described master control portable terminal, the master control portable terminal is as streaming media server, described another portable terminal as the Streaming Media client from described this portable terminal of master control acquisition for mobile terminal corresponding left side or right side video file.
Preferably, obtaining by the mode of bluetooth, WiFi or wired connection of described left side or right side video file undertaken.
A kind of portable terminal comprises: memory cell, clock difference acquiring unit and broadcast unit; When described portable terminal during as the master control portable terminal of 3D video playback,
Described memory cell is for left side or the right side video file of preserving the 3D video;
Described clock difference acquiring unit, be used for obtaining the clock difference between another portable terminal of self and 3D video playback, and determine that according to this clock difference self and another portable terminal carry out the zero-time of left and right sides video playback, notify respectively described broadcast unit and described another portable terminal; Wherein, the poor and described clock difference of the zero-time of described two described left and right sides video files of mobile terminal playing is identical;
Described broadcast unit for the broadcast left side of sending according to described clock difference acquiring unit or the zero-time of right side video file, carries out the broadcast of left side or right side video file.
Preferably, this portable terminal further comprises the streaming media server unit; When described portable terminal during as the non-master control portable terminal of 3D video playback,
Described memory cell is further used for preserving right side or the left side video file of 3D video;
Described streaming media server unit, the right side or the left side video file that are used for described another mobile terminal playing that described memory cell is preserved offer described another portable terminal.
Preferably, described clock difference acquiring unit further sends to the clock difference that obtains described another portable terminal before described video file begins to play; Also be used for periodically obtaining described clock difference at described video file playing process, and send to described another portable terminal.
A kind of portable terminal comprises: memory cell, synchronous control unit and broadcast unit; When described portable terminal during as the non-master control portable terminal of 3D video playback,
Described memory cell is for right side or the left side video file of preservation or buffer memory 3D video;
Described synchronous control unit is used for providing clock information to the master control portable terminal of 3D video playback, and this clock information is determined clock difference between self and described master control portable terminal for described master control portable terminal; Also be used for receiving described right side that described master control portable terminal sends determines according to described clock difference or the zero-time of left side video playback, and be transmitted to described broadcast unit;
Described broadcast unit for the broadcast right side of sending according to described synchronous control unit or the zero-time of left side video file, carries out the broadcast of described right side or left side video file.
Preferably, described portable terminal further comprises the Streaming Media client unit; When described portable terminal during as the non-master control portable terminal of 3D video playback, described Streaming Media client unit is used for continuing from the described right side of described master control acquisition for mobile terminal or left side video file, and is cached in the described memory cell.
Preferably, described synchronous control unit is used for receiving the clock difference of described master control portable terminal transmission and preserve before described video file being play; Also be used for receiving the clock difference that described master control portable terminal periodically obtains at the video file playing process, and the clock difference of this reception and the clock difference of preservation compared, if change, then the clock difference of preserving is updated to the clock difference of this reception, and with the change notification broadcast unit of clock difference;
Described broadcast unit is used for the variation according to the clock difference of described synchronous control unit transmission, adjusts the broadcast of described right side or left side video file.
As seen from the above technical solution, obtain respectively the left and right sides video file of 3D video for two portable terminals playing the 3D video; Master control acquisition for mobile terminal self in two portable terminals and the clock difference between another portable terminal are determined the zero-time that the left and right sides video file is play of carrying out of two portable terminals according to this clock difference, and are notified another portable terminal; Wherein, the zero-time of two mobile terminal playing left and right sides video files is poor identical with clock difference, thereby the broadcast that guarantees the left and right sides video file is synchronous.Then, two portable terminals carry out respectively the broadcast of left and right sides video file according to the zero-time of determining.By the way, make two mobile terminal synchronizations play the left and right sides video file of 3D video, thereby utilize two portable terminals to realize the 3D video playback of observation mirror mode.Both guaranteed that picture dimension was identical with a mobile terminal screen size, do not had again the loss of brightness and resolution, not high to screen request simultaneously, be easy to again simple.
Description of drawings
The double-movement terminal is carried out the particular flow sheet of 3D video playback among Fig. 1 the application;
Fig. 2 is the concrete structure schematic diagram of master control portable terminal and non-master control portable terminal among the application.
Embodiment
For the purpose, technological means and the advantage that make the application is clearer, below in conjunction with accompanying drawing the application is described in further details.
The application's basic thought is: utilize two portable terminals to carry out the 3D video playback of observation mirror mode, the video file of one side about each mobile terminal playing, thereby guarantee 3D rendering size and a portable terminal measure-alike after synthetic, and for brightness and resolution all less than losing.
Fig. 1 is the particular flow sheet that the double-movement terminal is carried out the 3D video playback among the application.In two portable terminals, one of them portable terminal is used for the synchronous broadcast of control 3D video as the master control portable terminal.As shown in Figure 1, the method comprises:
According to the 3D video playback mode of observation mirror, the 3D video is divided into two video files of left and right sides, two portable terminals are play respectively one of them video file.Two portable terminals obtain left side or the right side video file that self will play separately.
Concrete obtain manner can be in advance two video files of left and right sides to be kept at respectively in two portable terminals; Perhaps, can also be that the master control portable terminal is preserved two video files of left and right sides, this master control portable terminal is as streaming media server, and another portable terminal obtains the side-looking frequency file that self will play as the Streaming Media client and carries out buffer memory and broadcast from the master control portable terminal.Wherein, the transmission of video file can realize by any connection between two servers, such as bluetooth, WiFi or direct wired connection etc.Specifically how to obtain the common technology means that the corresponding video file belongs to those skilled in the art by the mode of streaming media server and client, therefore, just repeat no more here.
Because two portable terminals have clock separately, and utilize clock separately to carry out time mark.And the time of the clock of different mobile terminal may have difference, therefore for realizing that two portable terminals carry out the broadcast of video file in the same absolute moment, thereby guarantee the synchronous broadcast of left and right sides video file, need to obtain the clock difference between self and another portable terminal.
Concrete obtain manner can followingly carry out:
A, master control portable terminal A send the 3D synchronization frame to another portable terminal B, and carry therein the timestamp information timestamp1 when sending;
B, portable terminal B receive the timestamp information timestamp2 that 3D synchronization frame and record receive, and to portable terminal A feedback 3D syn ack frame, and carry therein timestamp information timestamp3 when sending and the timestamp2 of record;
C, portable terminal A receive 3D syn ack frame, extract the timestamp2 and the timestamp3 that wherein carry, and record receives the timestamp information timestamp4 of 3D syn ack frame;
D, portable terminal A calculate the clock difference Δ according to timestamp1, timestamp2, timestamp3 and timestamp4
Ts
Wherein, consider that the propagation delay time between portable terminal A and portable terminal B is little a lot of than the time difference that human eye can be identified, therefore can directly ignore the propagation delay time of the two, specifically can calculate the clock difference Δ by following mode
Ts=(timestamp2-timestamp1+timestamp4-timestamp3) ÷ 2.
In addition, being connected transmission with the syn ack frame about synchronization frame among the above-mentioned steps a-c can realize by any connection between two servers, such as bluetooth, WiFi or direct wired connection etc.
Wherein, the poor clock difference of determining with step 102 of the zero-time of two mobile terminal playing left and right sides video files is identical.The transmission of clock difference can realize by any connection between two servers, such as bluetooth, WiFi or direct wired connection etc.
The zero-time of playing respectively through above-mentioned steps 103 two definite portable terminals is actually an identical absolute moment.Like this, carry out video playback according to this zero-time, for the user, just can receive simultaneously the video image of the left and right sides.
Further, the clock speed of considering different mobile terminal may be different, for guaranteeing in the process that video file is play, remain the synchronous broadcast of two portable terminals, preferably, the master control portable terminal sends when playing zero-time to another portable terminal in step 103, further carry the initial clock difference that the master control portable terminal calculates, then, next periodically carry out the measurement of clock difference by following step 105-106, and in time adjust the broadcast of video file.
By the processing of above-mentioned steps 105-106, can guarantee in the whole playing process of 3D video, guarantee to play synchronously.
So far, the 3D video broadcasting method flow process among the application finishes.Certainly in playing process, the user need to regulate the angle of observation mirror, and the picture of dual user terminal plays is overlapped fully.Wherein, can after video begins to play, adjust, before also can beginning at formal video file to play, play test pattern, carry out angle adjustment for the user.Concrete adjustment process is identical with the adjustment process that has now when utilizing the observation mirror mode to carry out the 3D video-see, just repeats no more here.
The application also provides master control portable terminal and the non-master control portable terminal of 3D video playback, and two portable terminals cooperate, and can be used for implementing above-mentioned the application's 3D video broadcasting method.Fig. 2 is the structural representation of these two kinds of portable terminals, the broadcast of each side-looking frequency file about the two carries out respectively.As shown in Figure 2, the most basically, the master control portable terminal comprises: memory cell 1, clock difference acquiring unit and broadcast unit 1.
Memory cell 1 is for left side (or right side) video file of preserving the 3D video.The clock difference acquiring unit, be used for obtaining the clock difference between the non-master control portable terminal of self and 3D video playback, and determine that according to this clock difference self and non-master control portable terminal carry out the zero-time of left and right sides video playback, notify respectively broadcast unit and non-master control portable terminal; Wherein, the zero-time of two mobile terminal playing left and right sides video files is poor identical with clock difference.Broadcast unit 1, the zero-time of (or right side) video file is carried out the broadcast of left side (or right side) video file on the left of the broadcast that is used for sending according to the clock difference acquiring unit.
Correspondingly, the most basically, non-master control portable terminal comprises: memory cell 2, synchronous control unit and broadcast unit 2.
Wherein, memory cell 2 is for right side (or left side) video file of preservation or buffer memory 3D video.Synchronous control unit is used for providing clock information to the master control portable terminal of 3D video playback, and this clock information is determined clock difference between self and described master control portable terminal for master control portable terminal; Also be used for receiving the zero-time according to definite right side (or left side) video playback of clock difference that the master control portable terminal is sent, and be transmitted to broadcast unit.Broadcast unit 2 for the zero-time of broadcast right side (or left side) video file of sending according to synchronous control unit, carries out the broadcast of right side (or left side) video file.
The above-mentioned basic structure that is portable terminal.For the source of the video file of preserving in the memory cell wherein, can be pre-stored in respective memory unit, perhaps also can utilize the mode of Streaming Media to obtain by the mode of real-time Transmission.
Particularly, obtain the side-looking frequency file that will play for realizing non-master control portable terminal by the mode of streaming media, preferably, master control portable terminal and non-master control portable terminal can also comprise respectively streaming media server unit and Streaming Media client unit.
Wherein, for the master control portable terminal, memory cell 1 is further used for preserving the side-looking frequency file that non-master control portable terminal will be play.The streaming media server unit, a side-looking frequency file that is used for non-master control mobile terminal playing that memory cell is preserved offers non-master control portable terminal.
For non-master control portable terminal, its Streaming Media client unit is used for continuing will play the video file of a side from master control acquisition for mobile terminal self as the Streaming Media client, and is cached in the memory cell 2.
In addition, be to realize the synchronous calibration in the video file playing process, preferably, the clock difference acquiring unit of master control portable terminal further sends to the clock difference that obtains non-master control portable terminal before video file begins to play; Also be used for periodically obtaining clock difference at the video file playing process, and send to non-master control portable terminal.Non-master control mobile terminal synchronization control unit is used for receiving the clock difference of master control portable terminal transmission and preserve before video file being play; Also be used for receiving the clock difference that the master control portable terminal periodically obtains at the video file playing process, and the clock difference of this reception and the clock difference of preservation compared, if change, then the clock difference of preserving is updated to the clock difference of this reception, and with the change notification broadcast unit of clock difference; The broadcast unit of non-master control portable terminal is used for the variation according to the clock difference of synchronous control unit transmission, adjusts the broadcast of right side (or left side) video file.
The master control portable terminal that the above-mentioned the application of being provides and the concrete structure of non-master control portable terminal.Certainly, in actual applications, can be in a portable terminal integrated above-mentioned two kinds of structures, thereby make this portable terminal can be used as the master control portable terminal, also can be used as non-master control portable terminal.
By above-mentioned the application's specific implementation as seen, when utilizing the double-movement terminal to realize the 3D video playback among the application, the screen of portable terminal is not had specific (special) requirements, do not need polarizing coating, do not need the screen technique of bore hole formula complexity.Do not need expensive flash type glasses, color is full, does not lose brightness, does not lose resolution, really accomplishes perfect 3D effect.Simultaneously, because observation mirror is level crossing, watches for a long time and do not hinder glasses.Further, the synchronizing process of above-mentioned double-movement terminal room not only can be used for the 3D video playback, also can be used for the double-movement terminal and shares synchronously broadcast (2D video, audio frequency).
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (12)
1. the method for a mobile terminal playing 3D video is characterized in that, comprising:
Two portable terminals that are used for broadcast 3D video obtain respectively the left and right sides video file of 3D video;
Master control acquisition for mobile terminal self in described two portable terminals and the clock difference between another portable terminal are determined that according to this clock difference described two portable terminals carry out the zero-time that the left and right sides video file is play, and are notified described another portable terminal; Wherein, the poor and described clock difference of the zero-time of described two described left and right sides video files of mobile terminal playing is identical;
Described two portable terminals carry out respectively the broadcast of left and right sides video file according to the zero-time of determining.
2. method according to claim 1 is characterized in that, the method further comprises: described master control mobile terminal period obtains the clock difference between self and another portable terminal, and sends to described another portable terminal; Described another portable terminal compares the poor clock difference of preserving with last time of the present clock that receives, when the two not simultaneously, play according to the poor video file to described another portable terminal of the present clock of described reception and to adjust.
3. method according to claim 1 and 2 is characterized in that, the clock difference between described master control acquisition for mobile terminal self and another portable terminal comprises:
Described master control portable terminal sends synchronization frame to described another portable terminal, and carries the temporal information timestamp1 when sending this synchronization frame;
Described another portable terminal receives described synchronization frame, record receives the temporal information timestamp2 of this synchronization frame, to described master control portable terminal feedback syn ack frame, and in this syn ack frame, carry described timestamp2 and the temporal information timestamp3 that sends the syn ack frame;
Described master control portable terminal receives described syn ack frame, and record receiving time information timestamp4; Calculate described clock difference Δ according to the described timestamp2 that carries in the described syn ack frame and timestamp3 and timestamp1 and timestamp4
Ts
4. method according to claim 3 is characterized in that, the transmission of described clock difference, synchronization frame and syn ack frame is undertaken by the mode of bluetooth, WiFi or wired connection.
5. method according to claim 1 is characterized in that, the left and right sides video file that described two portable terminals obtain respectively the 3D video comprises:
The left and right sides video file is pre-stored on described two portable terminals;
Perhaps,
With left and right sides video file pre-save on described master control portable terminal, the master control portable terminal is as streaming media server, described another portable terminal as the Streaming Media client from described this portable terminal of master control acquisition for mobile terminal corresponding left side or right side video file.
6. method according to claim 5 is characterized in that, obtaining by the mode of bluetooth, WiFi or wired connection of described left side or right side video file undertaken.
7. a portable terminal is characterized in that, this portable terminal comprises: memory cell, clock difference acquiring unit and broadcast unit; When described portable terminal during as the master control portable terminal of 3D video playback,
Described memory cell is for left side or the right side video file of preserving the 3D video;
Described clock difference acquiring unit, be used for obtaining the clock difference between another portable terminal of self and 3D video playback, and determine that according to this clock difference self and another portable terminal carry out the zero-time of left and right sides video playback, notify respectively described broadcast unit and described another portable terminal; Wherein, the poor and described clock difference of the zero-time of described two described left and right sides video files of mobile terminal playing is identical;
Described broadcast unit for the broadcast left side of sending according to described clock difference acquiring unit or the zero-time of right side video file, carries out the broadcast of left side or right side video file.
8. portable terminal according to claim 7 is characterized in that, this portable terminal further comprises the streaming media server unit; When described portable terminal during as the non-master control portable terminal of 3D video playback,
Described memory cell is further used for preserving right side or the left side video file of 3D video;
Described streaming media server unit, the right side or the left side video file that are used for described another mobile terminal playing that described memory cell is preserved offer described another portable terminal.
9. according to claim 7 or 8 described portable terminals, it is characterized in that described clock difference acquiring unit further sends to the clock difference that obtains described another portable terminal before described video file begins to play; Also be used for periodically obtaining described clock difference at described video file playing process, and send to described another portable terminal.
10. a portable terminal is characterized in that, this portable terminal comprises: memory cell, synchronous control unit and broadcast unit; When described portable terminal during as the non-master control portable terminal of 3D video playback,
Described memory cell is for right side or the left side video file of preservation or buffer memory 3D video;
Described synchronous control unit is used for providing clock information to the master control portable terminal of 3D video playback, and this clock information is determined clock difference between self and described master control portable terminal for described master control portable terminal; Also be used for receiving described right side that described master control portable terminal sends determines according to described clock difference or the zero-time of left side video playback, and be transmitted to described broadcast unit;
Described broadcast unit for the broadcast right side of sending according to described synchronous control unit or the zero-time of left side video file, carries out the broadcast of described right side or left side video file.
11. portable terminal according to claim 10 is characterized in that, described portable terminal further comprises the Streaming Media client unit; When described portable terminal during as the non-master control portable terminal of 3D video playback, described Streaming Media client unit is used for continuing from the described right side of described master control acquisition for mobile terminal or left side video file, and is cached in the described memory cell.
12. according to claim 10 or 11 described portable terminals, it is characterized in that described synchronous control unit is used for receiving clock difference and the preservation that described master control portable terminal sends before described video file is play; Also be used for receiving the clock difference that described master control portable terminal periodically obtains at the video file playing process, and the clock difference of this reception and the clock difference of preservation compared, if change, then the clock difference of preserving is updated to the clock difference of this reception, and with the change notification broadcast unit of clock difference;
Described broadcast unit is used for the variation according to the clock difference of described synchronous control unit transmission, adjusts the broadcast of described right side or left side video file.
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| CN106454421B (en) * | 2016-10-08 | 2019-07-16 | Oppo广东移动通信有限公司 | A kind of clock adjustment, device, terminal and multimedia synchronous play system |
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