CN1731864A - Multi-player digital film playing system based on two-stage synchronization technology - Google Patents
Multi-player digital film playing system based on two-stage synchronization technology Download PDFInfo
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- CN1731864A CN1731864A CN 200510028416 CN200510028416A CN1731864A CN 1731864 A CN1731864 A CN 1731864A CN 200510028416 CN200510028416 CN 200510028416 CN 200510028416 A CN200510028416 A CN 200510028416A CN 1731864 A CN1731864 A CN 1731864A
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Abstract
The invention provides a multi-player digital film playing system based on two-stage synchronization technology, comprising: a synchronous controller, a communication link, a synchronous signal transmission circuit, at least two digital movie players. The digital movie player is connected with the synchronous controller through the communication link. The synchronous signal transmission circuit connects the synchronous controller and the digital movie player. The digital movie player reads the data of digital movie film from the storage medium, decodes and displays on the movie screen. The synchronous controller performs a two-stage synchronous control to a plurality of digital movie players by a communication link and a synchronous signal transmission circuit. The synchronous signal transmission circuit transmits the synchronous signal from the synchronous controller to all of the digital movie players in the system in an extremely low and almost equal time delay. The invention has a flexible operation and selects the two-stage synchronous control among the multi-players.
Description
Technical field
What the present invention relates to is a kind of Play System of digital movie technical field, specifically, is a kind of multi-player digital film playing system based on two-stage synchronization technology.
Background technology
Ring curtain, spherical screen stereoscopic film are the interior on a large scale all special film presentation systems of scenery of a kind of energy performance.When watching this film, people stand in the middle section of auditorium, by around around wide picture surround, add and the cooperating of the corresponding to omnibearing stereo sound effective value of substance film, can produce extremely strong sense on the spot in person.Popular in the world this type of wider film mostly is the movie system that adopts many films at present.In Circamara system, during photography, need to use the special video camera that can guarantee many film synchronous operations based on film; During projection, need to use many projectors, and guarantee many projectors and the chain synchronous operation of 1 (or many) sound reproducing equipment by the electronic interlocking synchro system; Starting simultaneously, run-in synchronism, shutdown simultaneously.The digital movie technology is called as the relay shadow from noiseless to sound, black and white after colour, the third technical revolution of filmdom.In recent years, obtained using widely in a lot of countries.Equally, in some special digital movie forms, as encircle digital cinema playback systems such as curtain, ball curtain, solid and still need form by many digital movie playback equipments, but since know-why totally different, inapplicable this type of digital movie of the Circamara system of traditional many films and electronic interlocking synchronization mechanism.
Find through retrieval prior art, Chinese patent application number: 03129411.1, patent name: the synchronous liquid crystal display Play System of a kind of digital versatile disc all-in-one, this patent readme is: independently be made of the integrated player of LCD-DVD, or constitute jointly by integrated control synchro of LCD-DVD and the integrated synchrodyne of LCD-DVD, it is characterized in that the integrated player of described LCD-DVD, integrated control synchro of LCD-DVD and the integrated synchrodyne of LCD-DVD are all by DVD player, LCD display and timer constitute, also be provided with synchronous generator in the integrated control synchro of described LCD-DVD, infrared remote-control emitter and infrared remote control receiver, also be provided with synchronous signal receiver in the integrated synchrodyne of described LCD-DVD, infrared remote-control emitter and infrared remote control receiver, described synchronous generator, synchronous signal receiver, infrared remote-control emitter and infrared remote control receiver cooperating are to realize the synchronous playing of system.But this system only is applicable to the application places of synchronous less demanding the small screen, and inapplicable ring curtain, ball curtain, three-dimensional film etc. require the digital cinema playback system of fine synchronization.In further retrieving, do not find the identical or similar bibliographical information of theme any and of the present invention as yet.
Summary of the invention
The objective of the invention is at deficiency of the prior art, a kind of multi-player digital film playing system based on two-stage synchronization technology is provided.Make it in this system, utilize thick, smart two-stage Synchronization Control, thereby realize synchronous playing accurately.
The objective of the invention is to overcome deficiency of the prior art, system of the present invention comprises: isochronous controller, the communication link that connects film player and isochronous controller and synchronizing signal transmission circuit, N (N is not less than 2) platform digital film player.Wherein, for choosing of N platform digital film player quantity, the area that covers according to the size of digital movie image resolution ratio and screen is different with angle to be decided.Its function is to read the data of digital cinema movies from certain storage medium, decodes and it is presented on the motion picture screen.Isochronous controller utilizes communication link and synchronizing signal transmission circuit that many digital film players are carried out the two-stage Synchronization Control.Isochronous controller is a logical device unit, and its physics realization can be a hardware cell independently, also can be arranged in the film player.The communication link that connects isochronous controller and digital film player can be Ethernet, RS232 universal serial bus, CAN bus etc., and is not limited to above listed communication form; Also can comprise equipment such as hub, switch as required, and be not limited to above listed communication equipment.The synchronizing signal transmission circuit is transferred to system all digital film player with extremely low and approximately equalised time delay from isochronous controller with synchronizing signal.This circuit comprises the generation of desired signal and transmits that required all are electrically connected and for guaranteeing effectively required necessary signals driving, level and the signal form conversion equipment of transmission of signal.
During system works of the present invention, isochronous controller receives operational order by man-machine interface, and when receiving when playing the instruction of specifying film, isochronous controller sends the order of playing given content by communication link to each digital film player.Each player that receives this order starts demonstration preparation process.In this process, player is finished from storage medium and is read certain cinematic data, decodes, and the data behind at least one frame decoding are inserted pre-display buffer, thereby enter the demonstration readiness, realizes synchronously thick.Isochronous controller passes through the synchronous transmission circuit to each player transmitting synchronous triggering signal, this signal form can comprise periodically clock, trigger impulse, triggering level etc., it is not limited to above listed form, and can comprise the combination in any of above various signal forms.After receiving synchronous triggering signal, each player shows first two field picture of pre-display buffer immediately, and when the next frame image demonstration time arrives, finish the subsequent movies data, thereby enter continuous broadcast state from the reading, decode and decoded data are inserted the preparation of pre-display buffer of storage medium.Under the control of synchronous triggering signal, realize playing between each player precisely synchronously.
Compared with prior art, system of the present invention has flexible operation, the characteristics that method is simple and easy to realize.Thick between many players, smart two-stage Synchronization Control can be selected flexibly according to the needs of real figure film Play System application by this system.Owing to adopt synchronisation control means, multiple digital film player can encircle the curtain digital cinema playback systems for 180 °, 270 °, 360 ° according to the coverage of film image resolution and screen and the different formations of angle; Also can constitute curtain, ball curtain and three-dimensional digit film Play System up and down.Such digital movie form is compared with common film has the characteristics spectacular, spectacular, that telepresenc is strong.Can be applied in the projects such as monster fair, tourism, propaganda and amusement.
Description of drawings
Fig. 1 system architecture diagram of the present invention
The flow chart of Fig. 2 system of the present invention two-stage method for synchronous
Embodiment
As shown in Figure 1, the present invention includes: isochronous controller 1, communication link 2, synchronizing signal transmission circuit 3, at least two digital film players 4.Digital film player 4 is connected by communication link 2 with isochronous controller 1, synchronizing signal transmission circuit 3 connects isochronous controller 1 and digital film player 4, digital film player 4 reads the data of digital cinema movies from storage medium, decode and it is presented on the motion picture screen, isochronous controller 1 utilizes communication link 2 and 3 pairs of many digital film players of synchronizing signal transmission circuit 4 to carry out the two-stage Synchronization Control, and synchronizing signal transmission circuit 3 is transferred to system all digital film player 4 with extremely low and approximately equalised time delay from isochronous controller 1 with synchronizing signal.
Digital film player 4 quantity are according to the size of digital movie image resolution ratio and choose different with angle of area of screen covering.
Isochronous controller 1 is a logical device unit, and its physics realization can be a hardware cell independently, also can be arranged in the film player.
Communication link 2 can be Ethernet, RS232 universal serial bus, CAN bus etc., and is not limited to above listed communication form; Also can comprise equipment such as hub, switch as required, and be not limited to above listed communication equipment.
Synchronizing signal transmission circuit 3 comprises the generation of desired signal and transmits that required all are electrically connected and for guaranteeing effectively required necessary signals driving, level and the signal form conversion equipment of transmission of signal.
Below describe embodiments of the invention in detail.It should be noted, below be going through of embodiment, is only used for deepening the understanding of the present invention, is not to limit the invention to this scope.
Embodiment 1
Present embodiment is a digital Circamara player.In native system, comprise 9 identical high definition digital film players 4, an isochronous controller 1.Isochronous controller 1 and 9 high definition digital film players 4 are connected on same the ethernet concentrator by Ethernet interface separately.Ethernet cable and ethernet concentrator have constituted the communication link 2 between central controller and 9 the high definition digital film players 4.Synchronizing signal transmission circuit 3 adopts the LVDS mode to connect isochronous controller 1 and high definition digital film player 4.Isochronous controller 1 transmits clock signal and synchronous triggering signal of one-period property to arbitrary high definition digital film player 4 by synchronizing signal transmission circuit 3.Each high definition digital film player 4 shows reference clock by phase-locked generation this locality with this periodic clock signal as a reference.Because based on identical reference clock, so this locality of each high definition digital film player 4 shows between the reference clock to have synchronized relation.
The Synchronization Control of present embodiment is as follows, sees shown in Figure 2ly, and isochronous controller 1 sends the order of playing given contents successively or in the mode of broadcasting to 9 high definition digital film players 4; Each high definition digital film player 4 is being received the preparation of playing after this order, comprise from storage medium and read cinematic data, decoding and the decoded data of at least one frame are inserted pre-display buffer, enter the demonstration readiness, realize that the first order is slightly synchronous; Enter show readiness after, high definition digital film player 4 sends a feedback report to isochronous controller 1, it has entered the demonstration readiness to inform isochronous controller 1; After receiving that all high definition digital film players 4 enter the demonstration readiness, isochronous controller 1 sends a synchronous triggering signal by synchronizing signal transmission circuit 3 to each high definition digital film player 4; After receiving this synchronous triggering signal, each high definition digital film player 4 is presented at first two field picture of pre-display buffer on separately the screen immediately, and always before the follow-up demonstration time arrives, finishes all preparations that successive image shows.So circulation enters continuous broadcast state, realizes that the second level is synchronously smart.
Because this locality of each high definition digital film player 4 shows that reference clock has synchronized relation, so the demonstration in playing process deviation can not occur again, can guarantee to show synchronously accurately.
Embodiment 2
Present embodiment is a digital Circamara player.In native system, comprise 9 identical high definition digital film players 4, an isochronous controller 1.Isochronous controller 1 and 9 high definition digital film players 4 are connected on same the ethernet concentrator by Ethernet interface separately.Ethernet cable and ethernet concentrator have constituted the communication link 2 between central controller and 9 the high definition digital film players 4.Synchronizing signal transmission circuit 3 adopts the LVDS mode to connect isochronous controller 1 and high definition digital film player 4.Isochronous controller 1 only transmits a synchronous triggering signal by synchronizing signal transmission circuit 3 to arbitrary high definition digital film player 4.Each high definition digital film player 4 independent this locality that produce shows reference clock, so each high definition digital film player 4 produces the local synchronized relation that does not have strictness between the reference clock that shows.
Present embodiment can adopt with embodiment 1 in identical Synchronization Control flow process.
Because producing local the demonstration, each high clear degree digital film player 4 do not have strict synchronized relation between the reference clock, although so when beginning to play, the demonstration time has been carried out accurate alignment, but skew along with the time, between the demonstration time of each high definition digital film player 4 still deviation can appear, but as long as each high definition digital film player 4 independent frequency error that produce local demonstration reference clock is controlled on the lower level, in limited reproduction time, can guarantee that still the demonstration between each high definition digital film player 4 does not occur perceptible asynchronous.
The above only is a specific embodiment of realizing the best of the present invention, and only is illustrated with ring curtain digital film player.But for correct understanding of the present invention should be that the present invention is not limited to this application-specific of ring curtain digital film player, finishes the multi-player digital film playing system that film is play jointly but should contain a plurality of players of any use.
Claims (7)
1, a kind of multi-player digital film playing system based on two-stage synchronization technology, comprise: isochronous controller (1), communication link (2), it is characterized in that, also comprise: synchronizing signal transmission circuit (3), at least two digital film players (4), digital film player (4) is connected by communication link (2) with isochronous controller (1), synchronizing signal transmission circuit (3) connects isochronous controller (1) and digital film player (4), digital film player (4) reads the data of digital cinema movies from storage medium, decode and it is presented on the motion picture screen, isochronous controller (1) utilizes communication link (2) and synchronizing signal transmission circuit (3) that many digital film players (4) are carried out the two-stage Synchronization Control, and synchronizing signal transmission circuit (3) is transferred to system all digital film player (4) with extremely low and approximately equalised time delay from isochronous controller (1) with synchronizing signal.
2, the multi-player digital film playing system based on two-stage synchronization technology according to claim 1 is characterized in that, the quantity of digital film player (4) is according to the size and the decision of screen coverage of digital movie image resolution ratio.
3, the multi-player digital film playing system based on two-stage synchronization technology according to claim 1, it is characterized in that synchronizing signal transmission circuit (3) comprises the generation of desired signal and transmits that required all are electrically connected and for guaranteeing effectively required necessary signals driving, level and the signal form conversion equipment of transmission of signal.
4, the multi-player digital film playing system based on two-stage synchronization technology according to claim 3 is characterized in that, the synchronizing signal transmission circuit comprises periodic clock signal and synchronous triggering signal in (3).
5, the multi-player digital film playing system based on two-stage synchronization technology according to claim 4, it is characterized in that, the synchronizing signal transmission circuit only comprises synchronous triggering signal in (3), and the local reference clock that shows produces by each high definition digital film player (4) is independent.
6, the multi-player digital film playing system based on two-stage synchronization technology according to claim 1, it is characterized in that, isochronous controller (1) is a logical device unit, and its physics realization is a hardware cell independently, perhaps is arranged in film player (4).
7, the multi-player digital film playing system based on two-stage synchronization technology according to claim 1, it is characterized in that, communication link (2) is multiple communication form and communication equipment, as Ethernet, RS232 universal serial bus, CAN bus, and hub, switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510028416 CN1731864A (en) | 2005-08-04 | 2005-08-04 | Multi-player digital film playing system based on two-stage synchronization technology |
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| CN 200510028416 CN1731864A (en) | 2005-08-04 | 2005-08-04 | Multi-player digital film playing system based on two-stage synchronization technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112003928A (en) * | 2020-08-21 | 2020-11-27 | 深圳市康冠智能科技有限公司 | Multifunctional screen synchronous control method, device and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003928A (en) * | 2020-08-21 | 2020-11-27 | 深圳市康冠智能科技有限公司 | Multifunctional screen synchronous control method, device and equipment |
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