TWI390956B - Image displaying system and play synchronizing method therefor - Google Patents

Description

Image display system and its playback synchronization method

The present invention relates to the field of display technology, and in particular to an image display system and a method for playing the same.

The most common implementation of today's image display systems (such as large information boards, etc.) is to use a video splitter in a single player to split a single original picture produced by a single player's video into A plurality of sub-pictures are displayed in parallel by a plurality of displays to form a stunning and impressive large picture.

However, since the sub-picture is enlarged, each display can be played in full screen mode, which can reduce the display quality of the overall picture, especially when the size of the large picture is larger, the original picture is magnified more. The picture quality is also worse. For example, the same original picture is enlarged by 2×2 times and enlarged by 4×4 times, and the magnification of 4×4 is 4 times of 2×2, and the distortion rate of 4×4 can be expected to be more serious.

In the prior art, after the original picture is divided and enlarged, although the overall picture becomes large, the picture quality displayed by each display is lowered. Therefore, how to provide a large picture with high image quality is one of the problems that need to be solved urgently.

The present invention provides an image display system adapted to provide a high quality picture.

The invention provides a playback synchronization method for an image display system, which is suitable for providing an image display system with high image quality.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

In an embodiment of the present invention, an image display system includes a plurality of play display modules, each of which includes a player and a display; The frames played by these players are respectively displayed by the corresponding displays to be combined into a single picture. The player includes a master player and at least one slave player; during playback of the frames, the master player transmits a master playback progress information of the master player to the slave player, and the slave player is based on the slave player. This main playback progress information selectively corrects the respective slave playback progress information of the slave players.

In an embodiment of the present invention, the number of the slave players is plural, and the slave players are respectively connected to the master player through a network, so that the master player transmits the multicast in a multicast manner. The master plays progress information to these slave players.

In an embodiment of the invention, the master player transmits the main play progress information to the slave player at a predetermined time interval.

In an embodiment of the invention, the primary play progress information and the dependent play progress information respectively include an accumulated frame and a frame rate.

In an embodiment of the invention, the displays are each a direct view type display.

In an embodiment of the invention, the slave player is configured to reduce the playback speed of the slave player when the playback progress of the slave player is faster than the playback progress of the master player; when the slave player plays the playback progress When the playback progress of the main player is slower, the playback speed of the slave player is accelerated; and when the playback progress of the slave player is the same as the playback progress of the main player, the playback speed of the slave player is not changed.

Another embodiment of the present invention provides a playback synchronization method for an image display system. The image display system includes a plurality of playback display modules, and the playback display modules are respectively configured to achieve one or a portion of the above or other purposes. A player and a display are included; the frames played by the players are respectively displayed by the corresponding displays to be combined into a single picture, and the players include a main player and at least one slave player. The playback synchronization method includes the steps of: transmitting, by the primary player, a primary playback progress information of the primary player to the slave player; and selectively correcting, by the slave player, the respective one of the slave players according to the primary playback progress information. Slave playback progress information. The main play progress information and the subordinate play progress information may respectively include parameters such as the number of accumulated frames and the update frequency of the frame.

In an embodiment of the invention, the primary player transmits the primary play progress information to the slave player at a predetermined time interval.

In an embodiment of the present invention, the step of the slave player selectively correcting the slave play progress information of the slave players according to the main play progress information includes: the slave player receives the master play progress information; and the slave player compares The number of accumulated frames in the respective subordinate playback progress information and the number of accumulated frames in the main playback progress information, and the number of accumulated frames in the subordinate playback progress information of one of the subordinate players in the subordinate player and the main playback progress When the number of accumulated frames in the information is not equal, the difference between the number of accumulated frames in the subordinate playback progress information of the specific slave player and the number of accumulated frames in the main playback progress information, the predetermined reservation The time interval, the frame update frequency in the main playback progress information, and the frame update frequency in the subordinate playback progress information of the specific slave player to set a new frame update frequency of the specific slave player to correct the specific slave play. Slave playback progress information so that the frame played by this particular slave player can be in a particular slave Frame synchronization with the main player played once receiving a master at playing progress information player.

In an embodiment of the present invention, when the number of accumulated frames in the dependent playback progress information of the specific slave player is equal to the number of accumulated frames in the main playback progress information, the frame in the main playback progress information is set. The update frequency is used as the new frame update frequency for this particular slave player.

In an embodiment of the invention, the number of the slave players mentioned above is plural, and the master player transmits the master playback progress information of the master player to the slave players in a multicast manner.

The embodiment of the present invention rejects the implementation of a plurality of displays by a single player in the prior art, and adopts a new plurality of players for the structure of a plurality of displays. Each frame displayed by the display is from a dedicated player. Each display can output undistorted high-resolution original content, and all monitors can be combined to form a large image with ultra-high resolution and clear image quality.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, for example, up, down or left, right, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

Referring to FIG. 1 , an image display system 10 according to an embodiment of the present invention includes a plurality of play display modules 12 . Each play display module 12 includes a player and a display 125. The image frames of the plurality of players included in the playback display module 12 are displayed side by side by the corresponding displays 125 to be combined into a single picture, and the plurality of displays included in the display display module 12 may be directly viewed. Type display or other type of display, such as a projection display. The players can be divided into a main player 121 and a plurality of slave players 123, and the slave players 123 are respectively connected to the main player 121 through a network. In addition, the screen to be displayed on each display 125 can be provided in advance to each of the play display modules 12. For example, the screen to be displayed can be pre-stored in the built-in memory of each play display module 12, or Use external storage media to provide screen data, which can reduce data traffic on the network.

During the playing of the picture frame, the main player 121 transmits the main playing progress information of the main player 121 to each of the slave players 123 in a multicast manner at intervals of a predetermined time interval, and the slave players 123 are based on the slave players 123. This main play progress information selectively corrects the respective slave play progress information of these slave players 123. Specifically, when the playback progress of the slave player 123 is faster than the playback progress of the master player 121, the playback speed of the slave player 123 is lowered; when the playback progress of the slave player 123 is longer than the playback progress of the master player 121 When it is slow, the playback speed of the slave player 123 is accelerated; and when the playback progress of the slave player 123 is the same as the playback progress of the master player 121, the playback speed of the slave player 123 is not changed. The above-mentioned main playback progress information and the subordinate playback progress information respectively include parameters such as the number of accumulated frames and the update frequency of the frame; the accumulated frame number represents the playback progress, and the frame update frequency represents the playback speed.

A playback synchronization method suitable for the image display system 10 described above is specifically described below with reference to FIGS. 2 and 3. As shown in FIG. 2, the play synchronization method of the present embodiment causes the main player to transmit the main play progress information to each of the slave players at a predetermined time interval in a multicast manner (step 100). After receiving the main play progress information, each slave player can selectively correct the slave play progress information of the slave players according to the master play progress information (step 200).

Further, referring to FIG. 3, the above step 200 may include the following sub-steps:

Step 201: The slave player receives the main play progress information transmitted by the master player. The main play progress information includes parameters such as the number of accumulated frames and the update frequency of the frame as described above.

Step 203: The slave player compares the number of accumulated frames in the slave play progress information of the slave players and the number of accumulated frames in the master play progress information, and the number of accumulated frames in the slave play progress information of the slave players If the number of accumulated frames in the main playback progress information is not equal, step 205a is performed, otherwise step 205b is performed.

Step 205a: The slave player compares the difference between the number of accumulated frames in the respective subordinate playback progress information and the number of accumulated frames in the main playback progress information, the predetermined time interval, and the frame update frequency in the main playback progress information. And the frame update frequency in the slave play progress information of the slave player to set a new frame update frequency of the slave player to correct the respective play progress of the slave players to achieve the effect of playing synchronously with the master player. .

Step 205b: The slave player sets the frame update frequency in the main play progress information to the frame update frequency of the slave player. Based on the execution mode of step 205b, when it is necessary to change the switching speed of the screen displayed by the plurality of displays in parallel, as long as the main player is adjusted, the slave player dynamically changes during the correction, so no need to The player is set to avoid inconvenience in operation.

In addition, it can be understood that when the number of accumulated frames and the frame update frequency in the slave playback progress information of the slave player are equal to the frame accumulation number and the frame update frequency in the main playback progress information, the slave player It is also possible to keep the frame update frequency unchanged, instead of performing step 205b. Moreover, for the convenience of setting, the frame played by the slave player may be selected to synchronize with the frame played by the main player when the next playback progress information is received. Of course, it is also possible to synchronize before receiving the main playback progress information again, but as a result, it may be necessary to adjust the frame update frequency multiple times, thereby causing system load.

Referring to FIG. 4, an example of how to implement the synchronous playback of the slave player and the master player when the image display system 10 is applied to play the slideshow and the marquee text is illustrated.

As shown in FIG. 4, it is assumed that the image display system 10 has three players P1, P2, and P3 and three corresponding displays D1, D2, and D3; P1 is set as the main player, P2 and P3 are the subordinate players, and three are set. The upper portions of displays D1, D2, and D3 are used to display different portions of each complete slide to combine into a complete slide, and the lower portions are used to display the marquee text (eg, ABCD...6789), respectively. The overall effect of the left-shifting marquee is produced. The lower portion of each of the displays D1, D2, and D3 has 1000 display units so that 1000 marquee characters can be displayed.

Referring to Figures 5 and 6, it is shown how the slave players P2 and P3 can be synchronized to play the slideshow with the master player P1.

It is assumed that each player P1, P2 and P3 is preset to switch one picture frame every 2 seconds, and the main player P1 transmits the main play progress information to the slave players P2 and P3 every 10 seconds (ie, a predetermined time interval). The slave players P2 and P3 selectively correct the slave play progress information of the slave players according to the master play progress information; wherein the master play progress information and the slave play progress information may include the cumulative frame number and the frame update respectively. Parameters such as frequency. It is further assumed that the starting time points of the playing frames of the players P1, P2 and P3 are slightly different, so that at a certain point in time, the player P3 multicasts one picture frame than the players P1 and P2; as shown in FIG. 5, The player P1 and P2 are playing the picture frame F2, and the player P3 is playing the picture frame F3.

After receiving the main playback progress information transmitted by the main player P1, the slave players P2 and P3 can know that the current cumulative frame number of the main player P1 is 3 (corresponding to the frame F2) and the current frame update frequency is 2 per frame. 1 frame per second (ie 0.5 frames per second), then:

(a) The slave player P2 can know that the current number of accumulated picture frames of the slave player P2 is equal to the number of accumulated picture frames in the main play progress information without correction, and the slave player P2 can set the picture in the main play progress information. The frame update frequency (ie, one frame every 2 seconds) is the new frame update frequency of the slave player P2. Here, since the current frame update frequency of the slave player P2 is equal to the frame update frequency in the main play progress information, the slave player P2 can also set the current frame update frequency of the slave player P2 to a new frame. Update frequency (that is, keep the frame update frequency unchanged).

(b) The slave player P3 can know that the current cumulative frame number of the slave player P3 is one more than the number of accumulated frames in the master play progress information, and it is calculated that the current frame of the slave player P3 is required. The update frequency is adjusted to a frame every 2.5 seconds so that it can be played in synchronization with the main player P1 after a predetermined time interval (i.e., 10 seconds).

As shown in FIG. 6, after the slave players P2 and P3 selectively correct the slave play progress information of the slave players P2 and P3 according to the master play progress information transmitted by the master player P1, the players P1, P2 and P3 can be synchronized when playing frame F7.

Referring to Figures 7 and 8, it is shown how the slave players P2 and P3 are synchronized to play the marquee text in synchronization with the master player P1.

Assume that each player P1, P2, and P3 is preset to switch 30 frames per second, and the marquee text in each frame moves to the left by one display unit relative to the marquee text in the previous frame. The effect of moving to the left is generated, and the main player P1 transmits the main play progress information to the slave players P2 and P3 every 10 seconds (that is, the predetermined time interval), and the slave players P2 and P3 select according to the main play progress information. The slave playback progress information of each of the slave players P2 and P3 is corrected. The master play progress information and the slave play progress information respectively include parameters such as the number of accumulated frames and the update frequency of the frame. Since the lower portion of each of the displays D1, D2, and D3 is assumed to have 1000 display units, and the marquee characters of the adjacent two frames are different by one display unit, according to the relative positions of the displays D1, D2, and D3, When the player P1 starts playing from the picture frame F0, the player P2 should start playing from the picture frame F1000, and the player P3 should start playing from the picture frame F2000.

It is further assumed that the starting time points of the playing frames of the players P1, P2 and P3 are slightly different, as shown in FIG. 7, when the player P1 is playing the picture frame F55, the player P2 is playing the picture frame F1155, the player P3 The picture frame F2000 is being played; therefore, the slave player P2 multicasts 100 picture frames than the main player P1, and the slave player P3 plays 55 frames less than the main player P1.

After receiving the main playback progress information transmitted by the main player P1, the slave players P2 and P3 can know that the current cumulative frame of the main player P1 is 56 (corresponding to the frame F55) and the current frame update frequency is 30 frames per second. Picture frame, then:

(a) The slave player P2 can know that the current cumulative frame number of the slave player P2 is 100 more than the number of accumulated frames in the main play progress information, and it is calculated that the current frame of the slave player P2 is required. The update frequency is adjusted to 20 frames per second so that it can be played in synchronization with the main player P1 after a predetermined time interval (ie, 10 seconds).

(b) The slave player P3 can know that the current cumulative frame number of the slave player P3 is 55 less than the number of accumulated frames in the main play progress information, and it is calculated that the current frame of the slave player P3 is required. The update frequency adjusts 35.5 frames per second so that it can be played synchronously with the main player P1 after a predetermined time interval (ie, 10 seconds).

As shown in FIG. 8, after the slave players P2 and P3 correct the slave play progress information of the slave players P2 and P3 according to the master play progress information transmitted by the master player P1, the players P1, P2, and P3 are respectively It can be synchronized when playing the frame F355, F1355 and F2355.

It should be noted that, in the play synchronization method of the above embodiment of the present invention, the slide or marquee text played by each of the slave players P2 and P3 after a single correction may still be delayed due to the error or lead the master slave player P1. However, after multiple corrections, the gap between the three players P1, P2 and P3 can gradually converge, and finally achieve the purpose of playback synchronization.

In addition, the specific values of the number of the player and the display, the predetermined time interval, the number of accumulated frames, and the frame update frequency, which are listed in the above embodiments, are merely examples, and are not intended to limit the present invention.

In addition, the slave player in the image display system in the embodiment of the present invention is not limited to a plurality of, and may be one case; in this case, the connection between the master player and the single slave player is not Limited to the way through the network connection.

In summary, the embodiment of the present invention rejects the implementation of a plurality of displays by a single player in the prior art, and adopts a new complex player for the architecture of a plurality of displays. The player, therefore, can output undistorted high-resolution original content for each display, and all monitors can be combined to form a large image with ultra-high resolution and clear image quality.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

10. . . Image display system

12. . . Play display module

121. . . Master player

123. . . Slave player

125. . . monitor

P1, P2, P3. . . player

D1, D2, D3. . . monitor

100, 200, 201, 203, 205a, 205b. . . Steps to play the sync method

FIG. 1 is a structural diagram of an image display system according to an embodiment of the present invention.

FIG. 2 is a flowchart of a method for playing synchronization of an image display system according to an embodiment of the present invention.

FIG. 3 shows the various sub-steps of step 200 of FIG. 2.

Figure 4 illustrates an image display system for playing slideshows and marquee text.

FIG. 5 shows a case where the plurality of players in FIG. 4 play the slides out of synchronization.

FIG. 6 shows a situation in which a plurality of players shown in FIG. 5 are synchronized to play a slide show.

FIG. 7 shows a case where the plurality of players in FIG. 4 play the marquee characters out of synchronization.

FIG. 8 shows a situation in which a plurality of players shown in FIG. 7 are synchronized to play a marquee text.

10. . . Image display system

12. . . Play display module

121. . . Master player

123. . . Slave player

125. . . monitor

Claims (14)

An image display system includes: a plurality of play display modules, each of the play display modules respectively includes a player and a display, wherein the frames played by the players are respectively displayed by the corresponding displays to synthesize a picture The player includes a main player and at least one slave player. During the playing of the frames, the main player transmits a main playback progress information of the main player every predetermined time interval. Up to the at least one slave player, the at least one slave player correspondingly adjusts a slave play progress information of the at least one slave player according to the master play progress information. The image display system of claim 1, wherein the number of the at least one slave players is plural, and the slave players are respectively connected to the master player through a network, so that the master player The main playback progress information is transmitted to the slave players in a multicast manner. The image display system of claim 1, wherein the master play progress information and the slave play progress information respectively include a cumulative frame number and a frame update frequency. The image display system of claim 1, wherein the displays are respectively a always-view display. The image display system of claim 1, wherein the at least one slave player is configured to: reduce the at least one slave when the playback progress of the at least one slave player is faster than the playback progress of the master player The playback speed of the player. The image display system of claim 1, wherein the at least one slave player is configured to: speed up the at least one slave when the playback progress of the at least one slave player is slower than the playback progress of the master player Player playback speed degree. The image display system of claim 1, wherein the at least one slave player is configured to: when the playback progress of the at least one slave player is the same as the playback progress of the master player, the at least one is not changed. The playback speed of the slave player. A playback method for an image display system, the image display system includes a plurality of play display modules, each of the play display modules includes a player and a display, and the frames played by the players are respectively corresponding to the The display displays to synthesize a picture, and the players include a main player and at least one slave player, the play synchronization method comprising the steps of: causing the main player to transmit the main player every predetermined time interval a master playback progress message is sent to the at least one slave player; and the slave play progress information of the at least one slave player is adjusted according to the master play progress information by the at least one slave player. The playback synchronization method of claim 8, wherein the main playback progress information and the subordinate playback progress information respectively include a cumulative frame number and a frame update frequency. The playback synchronization method of claim 9, wherein the step of selectively correcting the slave play progress information of the at least one slave player by the at least one slave player according to the master play progress information comprises: borrowing Receiving the main play progress information by the at least one slave player; and comparing the accumulated frame number of the slave play progress information of the at least one slave player with the master play progress information by the at least one slave player Cumulating the number of frames, when the number of the accumulated frames of the slave play progress information of the one of the at least one slave players is not equal to the number of the accumulated frames of the master play progress information, a particular slave player based on that particular slave a difference between the cumulative number of frames of the slave play progress information of the player and the accumulated frame number of the master play progress information, the predetermined time interval, the frame update frequency of the master play progress information, and the specific slave The frame update frequency of the slave play progress information of the player is used to set a new frame update frequency of the specific slave player to correct the slave play progress information of the specific slave player. The play synchronization method of claim 10, wherein when the number of the accumulated picture frames of the slave play progress information of the specific slave player is equal to the number of the accumulated picture frames of the main play progress information, The frame update frequency of the main playback progress information is the new frame update frequency of the particular slave player. The play synchronization method of claim 10, wherein the slave play progress information of the specific slave player is corrected such that the frame played by the particular slave player next receives the master play at the particular slave player The progress information is synchronized with the frame played by the main player. The playback synchronization method of claim 8, wherein the main playback progress information and the subordinate playback progress information respectively include a cumulative frame number and a frame update frequency. The playback synchronization method of claim 8, wherein the number of the at least one slave player is plural, and the master player transmits the master playback progress information of the master player to the plurality of multicast players. Slave player.