CN1286037C - Projecting method and system - Google Patents
Projecting method and system Download PDFInfo
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- CN1286037C CN1286037C CN 03153849 CN03153849A CN1286037C CN 1286037 C CN1286037 C CN 1286037C CN 03153849 CN03153849 CN 03153849 CN 03153849 A CN03153849 A CN 03153849A CN 1286037 C CN1286037 C CN 1286037C
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Abstract
The present invention provides a projection method and a projection system which are applied to the field of network interconnection. In the projection method, each screen of image data or the image data in a variation region is transmitted in real time by a transmitter indirectly connected with a projector, and a receiver directly connected with the projector receives each screen of the image data or the image data in the variation region so as to restore the received image data. The projection system is composed of a first terminal, the projector connected with the first terminal and a plurality of second terminals which are in network connection with the first terminal, wherein each second terminal comprises a transmitting module used for transmitting the image data, and the first terminal comprises a receiving module used for receiving the image data and a restoring module used for restoring the image data. The projection method and the projection system of the present invention can keep the secret of a file needing to be projected, save transmission bandwidth, and reduce projection time delays caused by transmission.
Description
Technical field
The present invention relates to field of projection systems, particularly relate to a kind of projecting method and system that utilizes the network connection mechanism to realize.
Background technology
At present, in some mini-session place and enterprises, still take wired projector to carry out the projection of pictorial data mostly with shared, promptly a projector can only be connected with a station terminal by the wired connection mode, this terminal is transferred to the pictorial data of the needs of storage projection on the projector by wired mode, further the pictorial data that receives is carried out projection on screen by projector.
But the wired connection mode between above-mentioned wired projector and the terminal brings very big inconvenience can for the user on using.As when terminal A links to each other with projector, terminal B also needs to carry out projection operation, at this moment can take three kinds of measures to solve:
(1) with on the terminal B in requisition for the document copying of projection in terminal A, carry out projection by terminal A again, be the copy function of carrying out file but this mode needs the people; Simultaneously, with on the terminal B in requisition for the document copying of projection in terminal A, also not meeting terminal B needs the security requirements of projection file to this.
(2) line of disconnected end A and projector at first carries out wired connection with terminal B and this projector again, directly the file that needs projection among the terminal B is converted into corresponding pictorial data then by the projection on screen of this projector.But this mode during line, need be opened projector in plug again, thereby causes operational loaded down with trivial detailsly, also can lose time simultaneously.To each terminal, particularly to the relatively poor terminal of movability, the adjustment of its relevant position relation is quite to bother simultaneously.Simultaneously some movability terminal preferably itself does not have the wireline interface that is connected with projector, causes can not carry out wired connection with projector and carry out projection.
(3) if can carry out network information transfer between terminal A and the terminal B, can also send to the form of the file that needs projection on the terminal A by terminal B with mail, further the file that needs projection is carried out projection operation on screen by terminal A then.But this mode will be stored the file that needs projection equally on terminal A, and also not meeting terminal B needs the security requirements of projection file to this; The whole file of projection that needs will take relatively large bandwidth in Network Transmission simultaneously, and because Network Transmission may cause certain transmission delay.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of projecting method and system that realizes by the network connection mechanism, makes a plurality of terminals can share a projector and carries out projection; Help simultaneously the file that needs projection is maintained secrecy, and save transmission bandwidth, reduce to transmit the time-delay that projection is produced.
For addressing the above problem, the present invention proposes a kind of projecting method, respectively every screen pictorial data is being sent in real time with transmit leg that projector is connected indirectly; Comprising step with the direct-connected take over party of projector:
(R1) receive every screen pictorial data in real time;
(R2) every screen pictorial data is reduced handle and be transferred to projector respectively;
(R3) the every screen pictorial data after projector is handled reduction respectively is projected on the screen.
Simultaneously, the invention allows for a kind of projecting method, the pictorial data that changes in respectively with every screen surveyed area at the transmit leg that is connected indirectly with projector sends in real time; Comprising step with the direct-connected take over party of projector:
(r1) receive the pictorial data that changes in every screen surveyed area in real time;
(r2) pictorial data that changes in every screen surveyed area is reduced handle and be transferred to projector respectively;
(r3) pictorial data that changes in the every screen surveyed area after projector is handled reduction respectively is projected on the screen.
For addressing the above problem, the invention allows for a kind of optical projection system, comprise first terminal and the projector that is connected with described first terminal, described optical projection system also comprises a plurality of second terminals, constitutes network between described a plurality of second terminals and first terminal and connects;
Comprise in described second terminal:
Sending module is used for sending in real time pictorial data;
Comprise in described first terminal:
Receiver module is used for receiving in real time the pictorial data that described sending module is sent;
Recovery module is used for the pictorial data that receives reduced and handles and be transferred to described projector, is projected on the screen by described projector.
Beneficial effect of the present invention:
(1) because projecting method of the present invention is to transmit respectively to every screen pictorial data or to the pictorial data that changes in every screen surveyed area, so can reduce the transmission bandwidth that self takies, and almost can show the pictorial data of same screen simultaneously transmit leg and take over party, so the time-delay that projection operation is produced is little; In the projection process, take over party self can not preserve the data for projection of any reception automatically, thereby the pictorial data that needs projection is played privacy functions simultaneously.
(2) because optical projection system of the present invention has adopted the network connection mechanism, thus can make a plurality of second terminals and first terminal that is connected with projector between the position be set flexibly concern.
Description of drawings
Fig. 1 is the system architecture topological diagram of optical projection system of the present invention;
Fig. 2 is the internal module composition frame chart of second terminal among optical projection system first embodiment of the present invention;
Fig. 3 is the internal module composition frame chart of second terminal among optical projection system second embodiment of the present invention;
Fig. 4 is the internal module composition frame chart of second terminal among optical projection system the 3rd embodiment of the present invention;
Fig. 5 is first embodiment, three embodiment of optical projection system of the present invention at second terminal, the internal module composition frame chart of first terminal;
Fig. 6 is the process flow diagram that projecting method of the present invention sends every screen pictorial data respectively;
Fig. 7 is the process flow diagram that projecting method of the present invention receives every screen pictorial data;
Fig. 8 is the process flow diagram that projecting method of the present invention sends respectively the pictorial data that changes in every screen surveyed area respectively;
Fig. 9 is the process flow diagram that projecting method of the present invention receives respectively the pictorial data that changes in every screen surveyed area.
Embodiment
At first optical projection system of the present invention is elaborated.With reference to Fig. 1, be the system architecture topological diagram of optical projection system of the present invention; Here first terminal 1 is defined as the terminal that is connected with projector 3, a plurality of second terminals 2 are defined as the terminal that needs projection.Connect by the network interconnection technique between a plurality of second terminals 2 and first terminal 1 that is connected with projector 3; As forming wireless local area network (WLAN) system by the IEEE802.11 agreement between a plurality of second terminals 2 and first terminal 1, pass through wireless mode transmission diagram image data between then a plurality of second terminals 2 and first terminal 1; Can also form the cable LAN system by the IEEE802.3 agreement between a plurality of second terminals 2 and first terminal 1, between then a plurality of second terminals 2 and first terminal 1 by wired mode transmission diagram image data.
With reference to Fig. 2, be one of internal module composition diagram in second terminal 2 of optical projection system of the present invention, include compression module 24 and the sending module 25 that is connected with compression module 24, wherein:
With reference to Fig. 3, be in second terminal 2 of optical projection system of the present invention the internal module composition diagram two, include sensing module 21, being used for real-time perception obtains second terminal 2 and needs the surveyed area of the pictorial data of projection (surveyed area described here is at the same time, in the full screen image data might take place to change the set formed of pixel, these pixels that may take place to change are distributed in the various piece of full screen image data, the pixel that may take place to change a plurality of dispersions is formed a pixel collection, and this pixel collection is defined as surveyed area, down with);
Sending module 25 links to each other with comparison module 23, is used for the pictorial data after comparison module 23 comparison process is sent processing in real time.
With reference to Fig. 4, be in second terminal 2 of optical projection system of the present invention the internal module composition diagram three, corresponding to Fig. 3, present embodiment has added compression module 24 between comparison module 23 and sending module 25, be used for the different pictorial data that comparison module 23 relatively draws are compressed processing, and send to sending module 25.The same Fig. 3 of the function of other modules and mutual relationship thereof is not giving unnecessary details here.
At second terminal 2 of above-mentioned three kinds of different embodiment, before sending module 25, add sensing module 21, interception module 22, comparison module 23 and memory module 26 respectively; Or only add compression module 24; Or add sensing module 21, interception module 22, comparison module 23, memory module 26 and compression module 24 simultaneously, and all be for the pictorial data that makes transmission is few as much as possible, to take transmission bandwidth little to reach, the short purpose of projection time-delay.Thereby make the pictorial data that almost can show same screen between second terminal 2 of transmission diagram image data and first terminal 1 simultaneously, make second terminal 2 and first terminal 1 can realize projection synchronously.
With reference to Fig. 5, be at the embodiment that comprises compression module 24 in second terminal 2, the internal module composition diagram of corresponding first terminal 1.Comprise receiver module 11, be used for receiving in real time the pictorial data that second terminal, 2 sending modules 25 are sent;
Decompression module 12 links to each other with receiver module 11, is used for the pictorial data that receiver module 11 receives is in real time carried out decompression, and corresponding here above-mentioned compression module 24, this decompression module 12 adopts the lossless decompression algorithm;
Recovery module 13, link to each other with decompression module 12, be used for the pictorial data after decompression module 12 decompression is reduced processing in real time, and the pictorial data after reduction handled is transferred in the projector 3, by this projector 3 pictorial data of reducing after handling is projected on the screen in real time, thereby finishes whole projection process of the present invention.
Below again in conjunction with the above-mentioned optical projection system of the present invention, the detailed process of projecting method of the present invention is elaborated.The principle of projecting method is: it is that unit sends in real time with every screen that the transmission method that is connected (described indirect finger is by having wired connection relation or wireless connections relation with the direct-connected take over party of projector) with projector indirectly will need the pictorial data of projection, receive every screen pictorial data in real time and on projector, carry out projection in real time with the direct-connected take over party of projector, can make the transmit leg (hereinafter to be referred as transmit leg) that is connected indirectly with projector like this and the projection of every screen pictorial data be reached synchronous with the direct-connected take over party of projector (hereinafter to be referred as the take over party), take over party self can not preserve automatically to every screen pictorial data simultaneously, thereby, can reach the pictorial data that needs projection is maintained secrecy transmit leg.
In fact to needing every screen pictorial data of projection, each screen pictorial data often is not all to change with respect to the pictorial data of a last screen, and in the subregion variation has taken place just, around this principle, projecting method of the present invention proposes only to transmit in every screen pictorial data simultaneously with respect to the pictorial data in the surveyed area of a last screen pictorial data at every turn, thereby reduces to take transmission bandwidth.
Here said transmit leg corresponds to second terminal 2 in the above-mentioned optical projection system, first terminal 1 in the corresponding and above-mentioned optical projection system of take over party.Certain terminal B in hypothesis second terminal 2 need carry out projection below, and then terminal B will send to (following title first terminal 1 is terminal A) in first terminal 1 to every screen pictorial data of projection respectively, carries out projection by terminal A.
At first the situation to the every screen pictorial data of real-time Transmission describes, and with reference to Fig. 6, in the step 300, terminal B carries out lossless compress to the compressed module 24 of the first screen pictorial data that needs projection to be handled;
In the step 310, the sending module 25 of terminal B sends the first screen pictorial data of handling through overcompression in the step 300 in real time;
In the step 320, terminal B carries out lossless compress to the compressed module 24 of the next screen pictorial data that needs projection to be handled;
In the step 330, the sending module 25 of terminal B sends the next screen pictorial data of handling through overcompression in the step 320 in real time; Go back to execution in step 320 then, till the pictorial data transmission that all is needed projection finishes.
The pictorial data that above-mentioned sending module 25 will send at every turn is transferred among the terminal A that is connected with projector 3 with wireless mode or wired mode.
With reference to Fig. 7, in the step 200, the first screen pictorial data that the sending module 25 of the receiver module 11 real-time receiving terminal B of terminal A is sent;
In the step 210,12 pairs of these screen pictorial data of the decompression module of terminal A are carried out lossless decompression and are handled;
In the step 220, the pictorial data after 13 pairs of decompression of the recovery module of terminal A is reduced processing, and pictorial data is converted to can the projected data form and be transferred in the projector 3;
In the step 230, the pictorial data after projector 3 is handled the reduction that receives from step 220 is projected in screen and shows;
In the step 240, the next screen pictorial data that the sending module 25 of the receiver module 11 real-time receiving terminal B of terminal A is sent rotates back in the step 210, and this screen pictorial data is carried out the same processing of above-mentioned steps 210 to step 230.Projection finishes up to handling all pictorial data receptions also.
Introduce the process of only pictorial data that changes in every screen surveyed area being carried out real-time Transmission below again, with reference to Fig. 8, in the step 100, the sensing module 21 real-time active perception of terminal B are also obtained the surveyed area (for the first screen pictorial data without perception, will be whole first pictorial data of shielding all send) of the every screen pictorial data that needs projection among the terminal B;
In the step 110, the pictorial data in the surveyed area that obtains in 22 pairs of steps 21 of the interception module of terminal B intercepts;
In the step 120, the pictorial data in the corresponding region of a last screen pictorial data of storing in the pictorial data of intercepting and its memory module 26 in 23 pairs of steps 110 of the comparison module of terminal B compares operation;
In the step 130, the comparative result in 23 pairs of steps 120 of comparison module judges see whether the two comparative result is identical, if execution in step 170, execution in step 140 if not;
In the step 140, the memory module 26 of terminal B is updated to the different pictorial data by relatively obtaining in the step 130 to the pictorial data in the corresponding region of a last screen pictorial data of storage;
In the step 150, carry out lossless compress by the different pictorial data that relatively obtain in 24 pairs of steps 130 of the compression module of terminal B and handle;
In the step 160, the sending module 25 of terminal B sends processing with the pictorial data of handling through lossless compress in the step 150, return in the step 100 then, pictorial data in follow-up every screen surveyed area is carried out the processing operation of identical process, finish up to pictorial data transmission with all changes;
In the step 170, the pictorial data of intercepting is not carried out any processing operation in 23 pairs of steps 120 of the comparison module of terminal B, to avoid the identical pictorial data of retransmission of content.
With reference to Fig. 9, receive the process flow diagram of the pictorial data that changes in every screen surveyed area in real time for the terminal A that is connected with projector 3, in the step 400, the pictorial data that changes in every screen surveyed area that the sending module 25 of the receiver module 11 real-time receiving terminal B of terminal A is sent;
In the step 410, the pictorial data that changes in the surveyed area that receives in 12 pairs of steps 400 of the compression module of terminal A is carried out lossless decompression and is handled;
In the step 420, the pictorial data after process lossless decompression in 13 pairs of steps 410 of the recovery module of terminal A is handled is reduced processing, and it is converted to can the projected data form and be transferred in the projector 3;
In the step 430, the screen that the pictorial data projector 3 is handled the reduction that receives from step 420 after is projected in regulation shows.
Above-mentioned the projecting method that the pictorial data that changes in every screen surveyed area is sent, first will transmit after the Data Compression of Image; Second transmits the pictorial data that changes in the surveyed area; Pictorial data in the corresponding region of all wanting before the 3rd each compressed image data and storing compares, and preventing to retransmit the pictorial data of identical content, thereby can handle the degree that takies the transmission bandwidth minimum to the pictorial data of needs transmission.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1, a kind of projecting method is characterized in that, respectively every screen pictorial data is being sent in real time with transmit leg that projector is connected indirectly; Carrying out following steps with the direct-connected take over party of projector:
(R1) receive every screen pictorial data in real time;
(R2) every screen pictorial data is reduced handle and be transferred to projector respectively;
(R3) the every screen pictorial data after projector is handled reduction respectively is projected on the screen.
2, projecting method according to claim 1 is characterized in that, described transmit leg also comprises before respectively every screen pictorial data being sent in real time, every screen pictorial data is compressed processing; Described step (R1) and (R2) between also comprise respectively every screen pictorial data carried out decompression.
3, a kind of projecting method is characterized in that, the pictorial data that changes in respectively with every screen surveyed area at the transmit leg that is connected indirectly with projector sends in real time; Comprising step with the direct-connected take over party of projector:
(r1) receive the pictorial data that changes in every screen surveyed area in real time;
(r2) pictorial data that changes in every screen surveyed area is reduced handle and be transferred to projector respectively;
(r3) pictorial data that changes in the every screen surveyed area after projector is handled reduction respectively is projected on the screen.
4, projecting method according to claim 3 is characterized in that, described transmit leg also comprises before respectively the pictorial data that changes in every screen surveyed area being sent in real time:
The first screen pictorial data is stored;
Obtain the surveyed area of every screen pictorial data in real time;
Pictorial data in the intercepting surveyed area.
5, projecting method according to claim 4, it is characterized in that, after the pictorial data in described intercepting surveyed area, and before sending in real time, the pictorial data that described transmit leg changes in respectively with every screen surveyed area also comprises, the pictorial data of intercepting and the pictorial data in the corresponding region of storage are compared, if comparative result is identical, the pictorial data that intercepts is not dealt with; If the comparative result difference is gone the pictorial data in the corresponding region of updated stored with the different pictorial data that relatively draw, and described different pictorial data as to shielding the pictorial data in the surveyed area.
6, projecting method according to claim 5 is characterized in that, if the comparative result difference also will be compressed processing to the different pictorial data that relatively draw; The pictorial data that changes in also comprising respectively to every screen surveyed area in described step (r1) with (r2) is carried out decompression.
7, a kind of optical projection system comprises first terminal and the projector that is connected with described first terminal, it is characterized in that described optical projection system also comprises a plurality of second terminals, constitutes network between described a plurality of second terminals and first terminal and connects;
Comprise in described second terminal:
Sending module is used for sending in real time pictorial data;
Memory module, be used for to first the screen pictorial data store and the real-time update surveyed area in pictorial data;
Sensing module is used for obtaining in real time the surveyed area of every screen pictorial data;
Interception module is connected with described sensing module, is used to intercept the pictorial data in the surveyed area; Comprise in described first terminal:
Receiver module is used for receiving in real time the pictorial data that described sending module is sent; Recovery module is used for the pictorial data that receives reduced and handles and be transferred to described projector, is projected on the screen by described projector.
8, optical projection system according to claim 7 is characterized in that, also comprises the compression module that is connected with described sending module in described second terminal, is used for the pictorial data that will send is in real time compressed processing; Also comprise in described first terminal respectively and described receiver module and the decompression module that described recovery module is connected, be used for the pictorial data of real-time reception is carried out decompression.
9, optical projection system according to claim 8, it is characterized in that, also further comprise comparison module in described second terminal, be connected with described sending module, memory module and interception module respectively, the pictorial data that is used in the corresponding surveyed area of pictorial data and storage that will intercepting compares.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153849 CN1286037C (en) | 2003-08-25 | 2003-08-25 | Projecting method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153849 CN1286037C (en) | 2003-08-25 | 2003-08-25 | Projecting method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1591385A CN1591385A (en) | 2005-03-09 |
| CN1286037C true CN1286037C (en) | 2006-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03153849 Expired - Lifetime CN1286037C (en) | 2003-08-25 | 2003-08-25 | Projecting method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1286037C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4882320B2 (en) * | 2005-09-09 | 2012-02-22 | セイコーエプソン株式会社 | Projection system, information processing apparatus, change image data generation method, change image data generation program, and recording medium on which this program is recorded |
| JP5087830B2 (en) | 2005-09-09 | 2012-12-05 | セイコーエプソン株式会社 | Projection system |
| JP6499582B2 (en) * | 2013-07-23 | 2019-04-10 | 株式会社アレスシステム | SENDING COMPUTER, RECEIVING COMPUTER, METHOD EXECUTED BY THE SAME, AND COMPUTER PROGRAM |
| CN113422944B (en) * | 2021-06-30 | 2022-12-23 | 青岛海信激光显示股份有限公司 | Signal transmission method and projection equipment |
-
2003
- 2003-08-25 CN CN 03153849 patent/CN1286037C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1591385A (en) | 2005-03-09 |
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