Method for identifying the source of video signal

Abstract

The present invention provides a method for identifying the source of a video signal, comprising the following steps: a receiving end control unit in a receiving end device assigns a first identification code to a first transmitting end device. A first video data is transmitted via the first transmitting end device. The receiving end control unit synthesizes the first video data and a first identification image corresponding to the first identification code into first synthesized video data, and the receiving end control unit outputs the first synthesized video data to a display device. The present invention helps conference participants to quickly identify the corresponding video signal source presenter for a certain screen in the split screen, and then raise questions for discussion.

Description

Technical Field

[0001] The invention relates to a method for identifying the source of a video signal. Background Art

[0002] Traditionally, when a presenter wants to operate an information processing device (such as a notebook computer) to make a presentation through a display device, he must use a video signal cable (such as an HDMI video transmission cable) to connect the information processing device and a display device (such as a projector or a large-screen TV) to transmit the presentation image data output by the information processing device to the display device, thereby displaying the presentation image data. However, there are many limitations in the use of connecting the information processing device and the display device with a wired video signal cable for presentation. For example, when switching to display presentation data stored in different information processing devices during a meeting, the presenter must first remove the video signal cable from the original information processing device and then connect the video signal cable to another information processing device, which often interrupts the meeting agenda.

[0003] In response to the above-mentioned operational inconveniences, there are currently multi-person wireless presentation system products on the market; such multi-person wireless presentation system products generally include multiple transmission devices and a single receiving device. Each conference participant can connect a transmission device to the video output port of his or her own information processing device, while the receiving device is connected to the video input port of the display device. When only one presenter presses the projection button on the transmission device, one of these transmission devices will wirelessly transmit image data with the receiving device, and the display device will only display the image data output by a single information processing device. However, when multiple presenters press the projection button on the transmission device, multiple of these transmission devices will wirelessly transmit image data with the receiving device, and the display device will display the image data output by multiple information processing devices in a split-screen manner. However, in the split-screen display state, it is easy to cause confusion for the conference participants, and the conference participants cannot identify which presenter's information processing device is the source of each video signal in the split screen of the current display device. Therefore, when a meeting participant has questions about a certain screen in the split screen, he or she must ask to confirm whose presentation the screen belongs to before he or she can raise questions to the relevant presenter for discussion. Summary of the invention

[0004] In view of this, the present invention proposes a method for identifying the source of a video signal to effectively solve the above-mentioned problems encountered in the prior art.

[0005] According to a first aspect of the present invention, a method for identifying the source of a picture signal is provided, comprising: a receiving end control unit in a receiving end device assigning a first identification code to a first transmitting end device. A first image data is transmitted via the first transmitting end device. The receiving end control unit synthesizes the first image data and a first identification image corresponding to the first identification code into a first synthesized image data, and the receiving end control unit outputs the first synthesized image data to a display device.

[0006] According to a second aspect of the present invention, a method for identifying the source of a picture signal is provided, comprising transmitting a first image data and a first identification code to a receiving control unit in a receiving device via a first transmitting device. The receiving control unit synthesizes the first image data and a first identification image corresponding to the first identification code into a first synthesized image data, and the receiving control unit outputs the first synthesized image data to a display device.

[0007] According to a third aspect of the present invention, a method for identifying the source of a video signal is provided, comprising the following steps: a first transmitting end control unit in a first transmitting end device synthesizes first video data and a first identification image into first synthesized video data, wherein the first identification image corresponds to a first identification code. The first synthesized video data is transmitted to a receiving end control unit in a receiving end device via the first transmitting end device. The receiving end control unit outputs the first synthesized video data to a display device.

[0008] According to a fourth aspect of the present invention, a method for identifying the source of a video signal is provided, comprising: a receiving control unit in a receiving device assigns a first identification code to a first transmitting device, and the receiving control unit assigns a second identification code to a second transmitting device. When the receiving control unit simultaneously receives first video data transmitted by the first transmitting device and second video data transmitted by the second transmitting device, the receiving control unit performs the following steps: synthesizing the first video data and a first identification image corresponding to the first identification code into first synthesized video data. Synthesizing the second video data and a second identification image corresponding to the second identification code into second synthesized video data, and synthesizing the first synthesized video data and the second synthesized video data into a split-screen video data, and outputting the split-screen video data to a display device.

[0009] According to a fifth aspect of the present invention, a method for identifying the source of a video signal is provided, comprising: when a receiving control unit in a receiving device receives first video data and a first identification code transmitted by a first transmitting device, and simultaneously receives second video data and a second identification code transmitted by a second transmitting device, the receiving control unit performs the following steps: the receiving control unit synthesizes the first video data and a first identification image corresponding to the first identification code into first synthesized video data. The receiving control unit synthesizes the second video data and a second identification image corresponding to the second identification code into second synthesized video data, and the receiving control unit synthesizes the first synthesized video data and the second synthesized video data into a split-screen video data, and outputs the split-screen video data to a display device.

[0010] According to a sixth aspect of the present invention, a method for identifying the source of a video signal is provided, comprising: when a receiving-end control unit in a receiving-end device simultaneously receives first video data transmitted by a first transmitting-end device and second video data transmitted by a second transmitting-end device, the following steps are performed: the receiving-end control unit notifies the first transmitting-end control unit to synthesize the first video data and a first identification image into first synthesized video data, wherein the first identification image corresponds to a first identification code. The receiving-end control unit notifies the second transmitting-end control unit to synthesize the second video data and a second identification image into second synthesized video data, wherein the second identification image corresponds to a second identification code. The first synthesized video data is transmitted to the receiving-end control unit via the first transmitting-end device. The second synthesized video data is transmitted to the receiving-end control unit via the second transmitting-end device. And the receiving-end control unit synthesizes the first synthesized video data and the second synthesized video data into a split-screen video data, and outputs the split-screen video data to a display device.

[0011] Compared with the prior art, the embodiment of the present invention can avoid the problem in the traditional practice that the participants cannot identify the information processing device of the presenter whose video signal source is in the split screen display state. It helps the participants to quickly identify the corresponding video signal source presenter for a certain screen in the split screen, and then raise questions for discussion.

[0012] In order to better understand the above and other aspects of the present invention, the following embodiments are specifically described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A flow chart of a method for identifying a source of a video signal according to a first embodiment of the present invention is shown.

[0014] Figure 2 Draw Figure 1An example of a detailed flow chart of the method for identifying the source of a video signal.

[0015] Figure 3 A block diagram of a wireless presentation system according to a first embodiment of the present invention is shown.

[0016] Figure 4A Draw Figure 3 Schematic diagram of an application scenario of the wireless briefing system.

[0017] Figure 4B Draw Figure 4A A schematic diagram of an image area and a recognition area according to an embodiment of the present invention.

[0018] Figure 4C Draw Figure 4A A schematic diagram of an image area and a recognition area according to an embodiment of the present invention.

[0019] Figure 5 A flow chart of a method for identifying a source of a video signal according to a second embodiment of the present invention is shown.

[0020] Figure 6 Draw Figure 5 An example of a detailed flow chart of the method for identifying the source of a video signal.

[0021] Figure 7 FIG. 4 is a flow chart of a method for identifying a source of a video signal according to a third embodiment of the present invention.

[0022] Figure 8 FIG. 4 is a block diagram of a wireless presentation system according to a third embodiment of the present invention.

[0023] Fig. 9 Draw Figure 8 Schematic diagram of an application scenario of the wireless briefing system.

[0024] Fig.10 A flow chart of a method for identifying a source of a video signal according to a fourth embodiment of the present invention is shown.

[0025] Fig.11 Draw Fig.10 An example of a detailed flow chart of the method for identifying the source of a video signal.

[0026] Fig.12 A block diagram of a wireless presentation system according to a fourth embodiment of the present invention is shown. DETAILED DESCRIPTION

[0027] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0028] Please refer to Figure 1, which illustrates a flow chart of a method for identifying the source of a video signal according to a first embodiment of the present invention. Figure 3 , which illustrates a block diagram of a wireless presentation system 300 according to a first embodiment of the present invention. Figure 1 As shown, the method for identifying the source of a picture signal of the present invention comprises the following steps: Step 102: The receiving end control unit 324 in the receiving end device 320 assigns a first identification code to the first transmitting end device 310. Step 104: The first image data is transmitted via the first transmitting end device 310. Step 106: The receiving end control unit 324 synthesizes the first image data and the first identification image corresponding to the first identification code into first synthesized image data. Step 108: The receiving end control unit 324 outputs the first synthesized image data to the display device 360.

[0029] like Figure 3 As shown, the wireless presentation system includes a first transmitting device 310 and a receiving device 320, and may optionally include a second transmitting device 330. The first transmitting device 310 includes a first transmitting control unit 312 and a first transmission module 314. The first transmitting control unit 312 is used to receive the first video data Vid1 from the first video source 350, and the first transmission module 314 can transmit the first video data Vid1. Similarly, the second transmitting device 330 includes a second transmitting control unit 332 and a third transmission module 334. The second transmitting control unit 332 is used to receive the second video data Vid2 from the second video source 352, and the third transmission module 334 is used to transmit the second video data Vid2. The receiving device 320 includes a second transmission module 322 and a receiving control unit 324. The second transmission module 322 can selectively establish a wireless transmission WL1 connection with the first transmission module 314 and receive the first video data Vid1 . The second transmission module 322 can selectively establish a wireless transmission WL2 connection with the third transmission module 334 and receive the second video data Vid2 .

[0030] Please refer to Figure 2 , which shows Figure 1 Corresponding to step 102, when the receiving end device 320 establishes a connection with the first transmitting end device 310, the receiving end control unit 324 assigns a first identification code to the first transmitting end device 310, and the detailed steps include Figure 2Steps 204 to 206 are shown. In step 204, is it determined whether the receiving device 320 has established a connection with the transmitting device? If the connection has been established, step 206 is executed. In step 206, the receiving device 320 records the order in which the transmitting device has established a connection, and assigns an identification code of a corresponding color to the transmitting device. In addition, in step 204, when the receiving device 320 and the first transmitting device 310 are connected to power, the user can press the pairing button on the receiving device 320 and the first transmitting device 310, and then both parties will try to establish a connection. After the first transmission module 314 in the first transmission end device 310 establishes a connection with the second transmission module 322 in the receiving end device 320, step 206 is executed. The receiving end device 320 and the first transmission end device 310 will mutually update internal information. The receiving end device 320 will also record the first transmission end device 310's order of establishing a connection, and assign an identification code of a corresponding color to the transmission end device. The first transmission end control unit 312 and the receiving end control unit 324 both have a preset storage list of identification code corresponding light color. For example, the first transmission end device that successfully establishes a connection with the receiving end device 320 is predetermined to be assigned identification code #1, and its corresponding first identification image is red. The second transmission end device that successfully connects is predetermined to be assigned identification code #2, and its corresponding second identification image is green... and so on. Thus, when the first transmission end device 310 is the first transmission end device to establish a connection, the receiving end control unit 324 will record that the first transmission end device 310 is the first to establish a connection, and assign the identification code #1 to the first transmission end device 310. Similarly, when the second transmission end device 330 is connected to the power supply later and becomes the second transmission end device to successfully establish a connection with the receiving end device 320, the receiving end control unit 324 will record that the second transmission end device 330 is the second to establish a connection, and assign the identification code #2 to the second transmission end device 330. The receiving end control unit 324 can refer to the list of light signal colors corresponding to the identification codes stored in the internal preset storage to know that the first identification image corresponding to the identification code #1 is red, and the second identification image corresponding to the identification code #2 is green. In this embodiment, the first identification image and the second identification image are respectively described by taking red and green as examples, but it is not limited thereto. The first identification image and the second identification image can also be Arabic numerals "1" and "2", or English letters "A" and "B".

[0031] Corresponding to step 104, the detailed steps include: Figure 2Step 208 is shown. In step 208, it is determined whether the transmitting end device transmits the video data to the receiving end device 320? If yes, step 210 is executed. When the first transmission module 314 of the first transmitting end device 310 establishes a connection with the second transmission module 322 of the receiving end device 320, but the first user has not yet pressed the projection button on the first transmitting end device 310, the first transmitting end device 310 does not transmit the first video data Vid1 to the receiving end device 320. When the first user presses the projection button on the first transmitting end device 310, the first transmitting end device 310 starts to transmit the first video data Vid1 to the receiving end device 320, so step 208 is satisfied, and step 210 is executed. Similarly, when the third transmission module 334 of the second transmission end device 330 establishes a connection with the second transmission module 322 of the receiving end device 320 , when the second user presses the projection button on the second transmission end device 330 , the second transmission end device 330 starts to transmit the second video data Vid2 to the receiving end device 320 .

[0032] like Figure 2As shown, the method for identifying the source of a video signal in this embodiment may optionally include step 209, determining whether more than one transmitting device transmits video data to the receiving device 320? If so, step 210 is executed, and if not, step 210 is skipped. Step 209 is for the following scenario, the receiving control unit 324 can dynamically shut down the video synthesis circuit in the receiving control unit, dynamically reduce the power consumption of the receiving control unit 324, and achieve power saving effect. Step 209 is applicable to the following scenarios: although both the first transmission device 310 and the second transmission device 330 have established connections with the receiving device 320, (1) when only the first transmission device 310 is transmitting the first video data Vid1 to the receiving device 320 and the entire screen of the display device 360 ​​is displaying the first video data Vid1, the participants in the meeting can clearly understand that the presenter who is currently operating the first transmission device 310 is outputting the first video data Vid1. In this way, the receiving control unit 324 can omit displaying the color corresponding to the identification code in the display device 360. For example, the receiving control unit 324 can turn off the video synthesis circuit in the receiving control unit 324 and skip step 210 to reduce the power consumption of the receiving control unit 324. (2) When the first transmitting device 310 transmits the first video data Vid1 to the receiving device, and the second transmitting device 330 transmits the second video data Vid2 to the receiving device 320 at the same time, the display device 360 ​​displays the first video data Vid1 and the second video data Vid2 in a split screen manner at the same time, and the participants in the meeting are unable to clearly identify the video signal at this time, then the receiving control unit 324 needs to display the color corresponding to the identification code in the display device 360, for example, the receiving control unit 324 only then activates the video synthesis circuit in the receiving control unit 324 and executes step 210.

[0033] Corresponding to steps 106 to 108, the detailed steps include: Figure 2 Step 210 is shown: the receiving device 320 displays the color corresponding to the identification code in the display device 360 ​​according to the identification code assigned to the transmitting device, and the indicator light of the transmitting device displays the color corresponding to the identification code. When the first transmitting device 310 transmits the first video data Vid1 to the second transmission module 322, the receiving control unit 324 synthesizes the first video data Vid1 and the first identification image (e.g., the red identification image) into the first synthesized video data Vid_C1, and outputs the first synthesized video data Vid_C1 to the display device 360. When the first synthesized video data Vid_C1 is displayed on the display device 360, as shown in FIG. Figure 4AAs shown, the first synthesized video data Vid_C1 corresponds to the first video area 462 and the first identification area 464. The first video area 462 is adjacent to the first identification area 464. The first video area 462 displays the first video data Vid1, and the first identification area 464 displays the first identification image. The receiving end control unit 324 issues a prompt command to request the first indicator device 316 of the first transmitting end device 310 to display the first identification image. In this embodiment, the receiving end control unit 324 synthesizes the first video data Vid1 and the red identification image into the first synthesized video data Vid_C1, so that the corresponding red identification image is displayed on the display device 360, and the indicator light on the first transmitting end device 310 displays the red color corresponding to the identification code #1. Similarly, the receiving end control unit 324 synthesizes the second video data Vid2 and the green identification image into the second synthesized video data Vid_C2, and outputs the second synthesized video data Vid_C2 to the display device 360, so that the corresponding green identification image is displayed in the display device 360, and the second indication device 336 (such as an indicator light) on the second transmitting end device 330 displays the green color corresponding to the identification code #2.

[0034] Please refer to Figure 4A~Figure 4B , which respectively illustrate a schematic diagram of an application scenario of the wireless presentation system of the present invention, and a schematic diagram of an image area and an identification area of ​​an embodiment. A first video source 350 (e.g., a notebook computer) operated by a first user P1 outputs first video data Vid1 to a first transmission end device 310, and a second video source 352 (e.g., a notebook computer) operated by a second user P2 outputs second video data Vid2 to a second transmission end device 330. Both the first transmission end device 310 and the second transmission end device 330 establish a connection with the receiving end device 320. Since the first transmission end device 310 is the first transmission end device to establish a connection with the receiving end device 320, it is assigned an identification code #1. When the first composite video data Vid_C1 is displayed on the display device 360, the first composite video data Vid_C1 corresponds to the first video area 462 and the first identification area 464 located on the left half of the display device 360. The first video area 462 is adjacent to the first identification area 464. The first video area 462 displays the first video data Vid1, and the first identification area 464 displays the red identification image corresponding to the identification code #1. Figure 4BAs shown, the first identification area 464 is located at the upper left corner of the first video area 462, and a red block is displayed at this upper left corner. Similarly, when the second transmitting device 330 is the second transmitting device to establish a connection with the receiving device 320, it is assigned to the identification code #2. When the second synthetic video data Vid_C2 is displayed on the display device 360, the second synthetic video data Vid_C2 corresponds to the second video area 466 and the second identification area 468 located on the right half of the display device 360. The second video area 466 is adjacent to the second identification area 468. The second video area 466 displays the second video data Vid2, and the second identification area 468 displays the green identification image corresponding to the identification code #2. The second identification area 468 is located at the upper left corner of the second video area 466, and a green block is displayed at this upper left corner. As shown Figure 4B As shown, the receiving end control unit 324 assigns the second identification code (e.g., identification code #2) to the second transmitting end device 330, and transmits the second video data Vid2 via the second transmitting end device 330. The receiving end control unit 324 synthesizes the second video data Vid2 and the second identification image (e.g., green identification image) corresponding to the second identification code into the second synthesized video data Vid_C2. The receiving end control unit 324 outputs the first synthesized video data Vid_C1 and the second synthesized video data Vid_C2 to the display device 360. The first synthesized video data Vid_C1 and the second synthesized video data Vid_C2 are displayed in a split-screen manner on the display device 360. For example, the receiving end control unit 324 synthesizes the first synthesized video data Vid_C1 and the second synthesized video data Vid_C2 into a split-screen video data, and outputs the split-screen video data to the display device 360.

[0035] Please refer to Figure 4C , which is a schematic diagram of image areas and identification areas of another embodiment, a first identification area 464 surrounds the outer periphery of the first video area 462, and a red outer frame is displayed at the outer periphery. A second identification area 468 surrounds the outer periphery of the second video area 466, and a green outer frame is displayed at the outer periphery.

[0036] The first transmission device 310 has a first indicator light 316, and the receiving end control unit 324 issues a prompt command to request the first indicator light of the first transmission device 310 to display a red identification image. In this way, the participants in the conference can clearly understand the correspondence between the first video area 462, the red identification image in the first identification area 464, and the red identification image displayed by the first indicator light, and can easily understand that the source of the video signal of the first video area 462 located on the left half of the display device 360 ​​is the first video source 350 operated by the first user. Similarly, the second transmission device 330 has a second indicator light 336, and the receiving end control unit 324 issues a prompt command to request the second indicator light of the second transmission device 330 to display a green identification image. In this way, the participants in the conference can clearly understand the correspondence between the second video area 466, the green identification image in the second identification area 468, and the green identification image displayed by the second indicator light, and can easily understand that the source of the video signal of the second video area 466 located on the right half of the display device 360 ​​is the second video source 352 operated by the second user. In this embodiment, the first video area 462 is adjacent to the first identification area 464 by being located at a corner of the video area or surrounding the outer periphery of the video area, but is not limited thereto.

[0037] In the first embodiment, the wireless presentation system of the present invention can selectively execute the step of canceling the correspondence between the first identification code and the first transmission end device 310 when the first transmission end device 310 stops transmitting the first video data Vid1 to the second transmission module 322. Corresponding to the step of canceling the correspondence between the first identification code and the first transmission end device 310, the detailed steps include: Figure 2 Step 212 and 216 are shown. Step 212: Determine whether the transmitting device stops transmitting the video data to the receiving device 320? If yes, execute step 216: The receiving device 320 recycles the identification code of the corresponding sequence color assigned to the transmitting device. For example, the receiving control unit 324 recycles the identification code #1 and the corresponding red identification image originally assigned to the first transmitting device 310. When other transmitting devices and the receiving device 320 establish a connection later, the identification code #1 and the corresponding red identification image can be assigned to other newly connected transmitting devices.

[0038] In the first embodiment, the wireless presentation system of the present invention can selectively perform the following steps: Figure 2 Step 214 is shown: determine whether the transmitting device is powered off. When the first transmitting device 310 continues to transmit the first video data Vid1 to the second transmission module 322 and the transmitting device is not powered off, the receiving control unit 324 continues to output the first composite video data Vid_C1 to the display device 360.

[0039] See also Figure 5 , which shows Figure 5 The flowchart of the method for identifying the source of a video signal according to the second embodiment of the present invention is shown. The method for identifying the source of a video signal according to the second embodiment of the present invention can also be used as follows: Figure 3 The hardware architecture of the wireless presentation system shown in the block diagram only needs to modify the firmware programs inside the first transmitter control unit 312, the second transmitter control unit 332 and the receiver control unit 324 so that the first transmitter control unit 312, the second transmitter control unit 332 and the receiver control unit 324 can execute the Figure 5~Figure 6 The method steps are shown. Figure 5 As shown, the method for identifying the source of a video signal of the present invention comprises the following steps: Step 502: transmitting a first identification code to a receiving control unit 324 in a receiving device 320 via a first transmitting device 310. Step 504: transmitting a first video data Vid1 to a receiving control unit 324 in a receiving device 320 via the first transmitting device 310. Step 506: the receiving control unit 324 synthesizes the first video data Vid1 and a first identification image corresponding to the first identification code into a first synthesized video data Vid_C1. And Step 508: the receiving control unit 324 outputs the first synthesized video data Vid_C1 to the display device 360.

[0040] Please refer to Figure 6 , which shows Figure 5 Corresponding to step 502, when the receiving end device 320 establishes a connection with the first transmitting end device 310, the first transmitting end device 310 transmits the first identification code to the receiving end control unit 324 in the receiving end device 320, and the detailed steps include: Figure 6Steps 604 to 606 are shown. Step 604: Determine whether the receiving device 320 has established a connection with the transmitting device? If the connection has been established, execute step 606. Step 606: The first transmitting device 310 transmits the built-in color identification code to the receiving control unit 324 in the receiving device 320. In step 604, when the receiving device 320 and the first transmitting device 310 are connected to power, the user can press the pairing button on the receiving device 320 and the first transmitting device 310, and then both parties will try to establish a connection. When the first transmission module 314 in the first transmitting device 310 and the second transmission module 322 in the receiving device 320 have established a connection, execute step 606, the receiving device 320 and the first transmitting device 310 will interact with each other to update internal information, and the first transmitting device 310 transmits the first identification code to the receiving control unit 324 in the receiving device 320. Both the first transmission end control unit 312 and the receiving end control unit 324 have a preset list of identification codes corresponding to light colors stored in their internal storage. For example, the first transmission end device 310 is set to be assigned to identification code #1 when it leaves the factory, and its corresponding first identification image is red. The second transmission end device 330 is set to be assigned to identification code #2 when it leaves the factory, and its corresponding second identification image is green... and so on. In this way, when the first transmission end device 310 and the receiving end device 320 establish a connection, the receiving end control unit 324 will record that the first transmission end device 310 has identification code #1. Similarly, when the second transmission end device 330 and the receiving end device 320 establish a connection later, the receiving end control unit 324 will record that the second transmission end device 330 has identification code #2. By consulting the preset list of identification codes corresponding to light colors stored in the internal storage, the receiving end control unit 324 can know that the first identification image corresponding to identification code #1 is red, and the second identification image corresponding to identification code #2 is green. In this embodiment, the first identification image and the second identification image are illustrated by taking red and green as examples, but are not limited thereto. The first identification image and the second identification image may also be Arabic numerals "1" and "2", or English letters "A" and "B", respectively.

[0041] In this embodiment, the first identification code in the first transmission end device and the second identification code in the second transmission end device may be, for example, color identification codes assigned to the transmission end devices when they are shipped from the factory, but are not limited thereto. The first identification code may also be selected from one of the groups consisting of a hardware serial number, user input information, and a network address. For example, the first video source 350 providing the first video data Vid1 is an information processing device (e.g., a notebook computer) used by the first user, the information processing device executes an operating system (e.g., Microsoft Windows operating system), the first identification code is user information provided by the operating system (e.g., personal information of the first user set in the Microsoft Windows operating system console), for example, "Peter"; the information processing device transmits "Peter" to the first transmission end device 310 as the first identification code. For another example, the source of the first video data Vid1 is an information processing device (e.g., a notebook computer) having a camera thereon to shoot a portrait of the first user; the information processing device transmits the portrait of the first user to the first transmission end device 310 as the first identification code. For another example, the source of the first video data Vid1 is an information processing device (such as a notebook computer), which is connected to the Internet and has an Internet IP address; the information processing device transmits the Internet IP address to the first transmission end device 310 as the first identification code. For another example, the first transmission end device 310 has a factory hardware serial number, and the first identification code is the factory hardware serial number of the first transmission end device 310. For another example, the information processing device executes a communication software (such as Line, Skype, etc.), and the information processing device obtains the personal information of the logged-in user, such as "Peter"; the information processing device transmits "Peter" to the first transmission end device 310 as the first identification code. Any of the above-mentioned information that can identify the information processing device can be used as the first identification code. When the first identification code is "Peter", the factory hardware serial number or the Internet IP address, the first identification image is the image of the above-mentioned text. When the first identification code is the portrait of the first user, the first identification image is the portrait of the first user.

[0042] Corresponding to step 504, the detailed steps include: Figure 6 Step 608 is shown: determine whether the transmitting device transmits the video data to the receiving device 320. If yes, execute step 610. The specific details of step 608 are the same as those of step 208.

[0043] like Figure 6 As shown, the method for identifying the source of a video signal in this embodiment may optionally include step 609, determining whether more than one transmitting device transmits video data to the receiving device? If yes, step 610 is executed, otherwise, step 610 is skipped. The specific details of step 609 are the same as those of step 209.

[0044] Corresponding to steps 506 to 508, the detailed steps include: Figure 6 Step 610 is shown: the receiving device 320 displays the color corresponding to the identification code in the display device 360 ​​according to the identification code transmitted by the transmitting device, and the transmitting device indicator light displays the color corresponding to the identification code. The specific details of step 610 are the same as those of step 210.

[0045] In the second embodiment, the wireless presentation system of the present invention further performs the following steps: Figure 6 Step 612 is shown: Is the transmitting device powered off? When the first transmitting device 310 continues to transmit the first video data Vid1 to the receiving device 320 and the transmitting device is not powered off, the receiving control unit 324 continues to output the first composite video data Vid_C1 to the display device 360 ​​.

[0046] Please refer to Figure 7 , which illustrates a flow chart of a method for identifying the source of a video signal according to a third embodiment of the present invention. Figure 8 , which illustrates a block diagram of a wireless presentation system 800 according to a third embodiment of the present invention. Figure 7 As shown, the method for identifying the source of a picture signal of the present invention comprises the following steps: Step 702: The first transmitting end device 810 transmits the first video data Vid1 to the receiving end device 820, and the receiving end device 820 outputs the first video data Vid1 to the display device 860, and the first video data Vid1 corresponds to the first video area 862 in the display screen of the display device 860. Step 704: The user input device 870 provides the position of the user operation. Step 706: The receiving end control unit 824 determines whether the position of the user operation is located in the first video area 862? Step 708: When the position of the user operation is located in the first video area 862, the receiving end control unit 824 sends a prompt command to the first transmitting end device 810, so that the first transmitting end device 810 sends a first sound and light signal.

[0047] like Figure 8As shown, the wireless presentation system includes a first transmitting device 810 and a receiving device 820, and may optionally include a second transmitting device 830. The first transmitting device 810 includes a first transmitting control unit 812, a first transmission module 814, and a first indication device 816. The first transmitting control unit 812 is used to receive the first video data Vid1 from the first video source 850, and the first transmission module 814 can transmit the first video data Vid1. Similarly, the second transmitting device 830 includes a second transmitting control unit 832, a third transmission module 834, and a second indication device 836. The second transmitting control unit 832 is used to receive the second video data Vid2 from the second video source 852, and the third transmission module 834 is used to transmit the second video data Vid2. The receiving device 820 includes a second transmission module 822 and a receiving control unit 824. The second transmission module 822 can selectively establish a connection with the first transmission module 814 and receive the first video data Vid1, and the second transmission module 822 can selectively establish a connection with the third transmission module 834 and receive the second video data Vid2. The receiving end control unit 824 is used to output the first video data Vid1 and the second video data Vid2 to the display device 860. When the first video data Vid1 is displayed on the display device 860, the first video data Vid1 corresponds to the first video area 862, and the second video data Vid2 corresponds to the second video area 866. The first video area 862 and the second video area 866 are displayed in a split screen manner. The receiving end control unit 824 also receives a user operation position provided by the user input device 870.

[0048] Please refer to Fig. 9 , which shows Figure 8Schematic diagram of an application scenario of the wireless presentation system in the embodiment. In this embodiment, the user input device 870 is a touch panel of a large-size TV, which can provide the user with a pressing and touching operation, but is not limited thereto. The receiving end control unit 824 outputs the first video data Vid1 and the second video data Vid2 to the display device 860. When the first video data Vid1 is displayed on the display device 860, the first video data Vid1 corresponds to the first video area 862 on the left half of the display device 860, and the second video data Vid2 corresponds to the second video area 866 on the half of the display device 860. The first video area 862 and the second video area 866 are displayed in a split screen manner. When the user applies the first user operation Ipt1 (such as pressing or touching operation) in the first video area 862 on the left half, the touch panel will provide the position coordinate information of the relevant user operation to the receiving end control unit 824. When the receiving end control unit 824 receives the user operation position provided by the user input device 870 and determines that the user operation position is located in the first video area 862, the receiving end control unit 824 sends a prompt command to the first transmitting end device 810, so that the first indicator device 816 of the first transmitting end device 810 sends a first sound and light signal, such as the indicator light on the first transmitting end device 810 emits a red light signal, or the buzzer emits a short sound. Similarly, when the user applies a second user operation Ipt2 (such as a press or touch operation) in the second video area 866 on the right half, the touch panel will provide the position coordinate information of the relevant user operation to the receiving end control unit 824. When the receiving end control unit 824 receives the user operation position provided by the user input device 870 and determines that the user operation position is located in the second video area 866, the receiving end control unit 824 sends a prompt command to the second transmitting end device 830, so that the second indication device 836 of the second transmitting end device 830 sends a second sound and light signal, and the second sound and light signal is different from the first sound and light signal; for example, the indicator light on the second transmitting end device 830 sends a green light, or the buzzer sends two short sounds.

[0049] Please refer to Fig.10 , which illustrates a flow chart of a method for identifying the source of a video signal according to a fourth embodiment of the present invention. Fig.12 , which illustrates a block diagram of a wireless presentation system 1200 according to a fourth embodiment of the present invention. Fig.10As shown, the method for identifying the source of a picture signal of the present invention comprises the following steps. In step 1002, a first transmitting end control unit in a first transmitting end device synthesizes first video data and a first identification image into first synthesized video data, wherein the first identification image corresponds to a first identification code in the first transmitting end device. In step 1004, the first synthesized video data is transmitted to a receiving end control unit in a receiving end device via the first transmitting end device. In step 1006, the receiving end control unit outputs the first synthesized video data to a display device.

[0050] like Fig.12As shown, the wireless presentation system includes a first transmitting device 1210, a second transmitting device 1230 and a receiving device 1220. The first transmitting device 1210 includes a first transmitting control unit 1212, a first indicating device 1216 and a first transmission module 1214. The first transmitting control unit 1212 is used to receive the first video data Vid1 from the first video source 1250. The first transmitting control unit 1212 can selectively synthesize the first video data Vid1 and the first identification image corresponding to the first identification code into the first synthetic video data Vid_C1, wherein the first identification image corresponds to the first identification code in the first transmitting device. The first transmission module 1214 can be used to transmit the first video data Vid1 or the first synthetic video data Vid_C1. Similarly, the second transmitting end device 1230 includes a second transmitting end control unit 1232, a second indicating device 1236 and a third transmission module 1234. The second transmitting end control unit 1232 is used to receive the second video data Vid2 from the second video source 1252. The second transmitting end control unit 1232 can selectively synthesize the second video data Vid2 and the second identification image corresponding to the second identification code into the second synthetic video data Vid_C2, wherein the second identification image corresponds to the second identification code in the second transmitting end device. The third transmission module 1234 is used to transmit the second video data Vid2 or the second synthetic video data Vid_C2. The receiving end device 1220 includes a second transmission module 1222 and a receiving end control unit 1224. The second transmission module 1222 can selectively establish a wireless transmission WL1 connection with the first transmission module 1214 and receive the first video data Vid1 or the first synthetic video data Vid_C1. The second transmission module 1222 can also selectively establish a wireless transmission WL2 connection with the third transmission module 1234 and receive the second video data Vid2 or the second synthesized video data Vid_C2. When the receiving end control unit 1224 simultaneously receives the first synthesized video data Vid_C1 and the second synthesized video data Vid_C2, the receiving end control unit 1224 outputs the first synthesized video data Vid_C1 and the second synthesized video data Vid_C2 to the display device 360, so that the first synthesized video data Vid_C1 and the second synthesized video data Vid_C2 are displayed in a split-screen manner on the display device 360. For example, the receiving end control unit 1224 synthesizes the first synthesized video data Vid_C1 and the second synthesized video data Vid_C2 into a split-screen video data Vid_C3, and outputs the split-screen video data Vid_C3 to the display device 1260. In this embodiment, the first transmitting end control unit 1212 , the second transmitting end control unit 1232 , and the receiving end control unit 1224 all have synthesis circuits therein, which can synthesize the received synthesized video data.

[0051] Please refer to Fig.11 , which shows Fig.10 An example of a detailed flow chart of a method for identifying the source of a video signal in FIG. Fig.10 Step 1002 shown includes Fig.11 Step 1104 shown, Fig.10 Step 1004 shown includes Fig.11 Step 1108 shown, Fig.10 Step 1006 shown includes Fig.11 Step 1112 is shown.

[0052] like Fig.11 As shown, in step 1104, the receiving end control unit 1224 notifies the first transmitting end control unit 1212 to synthesize the first video data Vid1 and the first identification image into the first synthesized video data Vid_C1. After the first transmission module 1214 in the first transmitting end device 1210 and the second transmission module 1222 in the receiving end device 1220 establish a connection, the receiving end device 1220 and the first transmitting end device 1210 will mutually update the internal information, and the first transmitting end device 1210 transmits the first identification code to the receiving end control unit 1224 in the receiving end device 1220. Both the first transmitting end control unit 1212 and the receiving end control unit 1224 have a preset storage list of the corresponding light color of the identification code. For example, the first transmitting end device 1210 is set to be assigned to the identification code #1 when it leaves the factory, and the corresponding first identification image is red. The second transmitting end device 1230 is set to be assigned to the identification code #2 when it leaves the factory, and the corresponding second identification image is green, and so on. Thus, when the first transmission end device 1210 and the receiving end device 1220 establish a connection, the receiving end control unit 1224 will record that the first transmission end device 1210 has the identification code #1. Similarly, when the second transmission end device 1230 and the receiving end device 1220 establish a connection later, the receiving end control unit 1224 will record that the second transmission end device 1230 has the identification code #2. The receiving end control unit 1224 can learn that the first identification image corresponding to the identification code #1 is red, and the second identification image corresponding to the identification code #2 is green by consulting the list of light signal colors corresponding to the identification codes stored in the internal preset. In this embodiment, the first identification image and the second identification image are respectively described by taking red and green as examples, but it is not limited thereto. The first identification image and the second identification image can also be Arabic numerals "1" and "2", or English letters "A" and "B".

[0053] In step 1106 , the receiving-end control unit 1224 notifies the second transmitting-end control unit 1232 to synthesize the second video data Vid2 and the second recognition image into second synthesized video data Vid_C2 .

[0054] In step 1108, the first composite video data Vid_C1 is transmitted to the receiving end control unit 1224 via the first transmitting end device 1210. In step 1110, the second composite video data Vid_C2 is transmitted to the receiving end control unit 1224 via the second transmitting end device 1230. In step 1112, the receiving end control unit 1224 combines the first composite video data Vid_C1 and the second composite video data Vid_C2 into a split-screen video data Vid_C3, and the receiving end control unit 1224 outputs the split-screen video data Vid_C3 to the display device 1260.

[0055] like Fig.11As shown, the method for identifying the source of a video signal in this embodiment may optionally include steps 1102, 1114, and 1116. In step 1102, the receiving control unit 1224 in the receiving device 1220 determines whether (a) the first video data Vid1 transmitted by the first transmitting device 1210 and (b) the second video data Vid2 transmitted by the second transmitting device 1230 are simultaneously received. If so, step 1104 is executed, and if not, step 1114 is executed. Through step 1102, the receiving control unit 1224 determines whether more than one transmitting device transmits video data to the receiving device 1220. Steps 1114 to 1116 are for the following scenario: although both the first transmission end device 1210 and the second transmission end device 1230 have established a connection with the receiving end device 1220, (1) when only the first transmission end device 1210 is transmitting the first video data Vid1 to the receiving end device 1220 and the entire screen of the display device 1260 is displaying the first video data Vid1, the participants in the meeting can clearly understand that it is the presenter who is currently operating the first transmission end device 1210 who is outputting the first video data Vid1. In this way, the first transmission end control unit 1212 can omit displaying the color corresponding to the identification code on the display device 1260. For example, the first transmission end control unit 1212 can turn off the video synthesis circuit in the first transmission end control unit 1212 to reduce the power consumption of the first transmission end control unit 1212. (2) When the first transmitting device 1210 transmits the first video data Vid1 to the receiving device 1220, and the second transmitting device 1230 transmits the second video data Vid2 to the receiving device 1220, the display device 1260 displays the first video data Vid1 and the second video data Vid2 in a split screen manner, and the participants in the conference cannot clearly identify the video signal at this time, then the first transmitting control unit 1212 needs to display the color corresponding to the identification code in the display device 1260, for example, the first transmitting control unit 1212 activates the video synthesis circuit in the first transmitting control unit 1212 at this time. In this way, for the above two scenarios (1) and (2), the first transmitting control unit 1212 can dynamically shut down the video synthesis circuit in the first transmitting control unit 1212, dynamically reduce the power consumption of the first transmitting control unit 1212, and achieve power saving effect.

[0056] As described in the previous paragraph, the scenario corresponding to step 1114 is, for example, that the receiving end control unit 1224 only receives one of (a) the first video data Vid1 transmitted by the first transmitting end device 1210 and (b) the second video data Vid2 transmitted by the second transmitting end device 1230, and step 1114 in the present invention is based on the example of receiving the first video data Vid1 transmitted by the first transmitting end device 1210. In step 1114, the first video data Vid1 is transmitted to the receiving end control unit 1224 via the first transmitting end device 1210. In step 1116, the receiving end control unit 1224 displays the first video data Vid1 on the display device 1260. Fig.11 As shown, steps 1114-1116 are described by taking the example that the receiving end control unit 1224 receives the first video data Vid1 but does not receive the second video data Vid2, but is not limited thereto. Similarly, when in step 1114, the receiving end control unit 1224 receives the second video data Vid2 but does not receive the first video data Vid1, the corresponding steps 1114-1116 are correspondingly modified as follows: in step 1114, the second video data Vid2 is transmitted to the receiving end control unit 1224 via the second transmitting end device 1230; and in step 1116, the receiving end control unit 1224 displays the second video data Vid2 on the display device.

[0057] Corresponding to step 1104, the first transmitting end device 1210, according to the first identification code, the first transmitting end control unit 1212 synthesizes the first video data Vid1 and the first identification image (e.g., the red identification image) into the first synthesized video data Vid_C1, and outputs the first synthesized video data Vid_C1 to the receiving end device 1220. When the first synthesized video data Vid_C1 is displayed on the display device 1260, the first synthesized video data Vid_C1 corresponds to the first video area and the first identification area. The first video area is adjacent to the first identification area. The first video area displays the first video data Vid1, and the first identification area displays the first identification image. In this embodiment, the first video area and the first identification area are the same. Figure 4A to Figure 4CThe first video area 462 and the first identification area 464 of the first embodiment are shown. The first indicator device 1216 of the first transmission end device 1210 simultaneously displays the first identification image (e.g., a red identification image). In this embodiment, the first transmission end control unit 1212 synthesizes the first video data Vid1 and the red identification image into the first synthesized video data Vid_C1, so that the corresponding red identification image is displayed on the display device 1260, and the indicator light on the first transmission end device 1210 displays the red color corresponding to the identification code #1. Similarly, the second transmission end control unit 1232 synthesizes the second video data Vid2 and the green identification image into the second synthesized video data Vid_C2, and outputs the second synthesized video data Vid_C2 to the receiving end device 1220, so that the corresponding green identification image is displayed on the display device 1260, and the second indicator device 1236 (e.g., an indicator light) on the second transmission end device 1230 displays the green color corresponding to the identification code #2.

[0058] In this embodiment, the first identification code in the first transmission end device and the second identification code in the second transmission end device may be, for example, color identification codes assigned to the transmission end devices when they are shipped from the factory, but are not limited thereto. The first identification code may also be selected from one of the groups consisting of a hardware serial number, user input information, and a network address. For example, the first video source 1250 providing the first video data Vid1 is an information processing device (e.g., a notebook computer) used by the first user, the information processing device executes an operating system (e.g., Microsoft Windows operating system), and the first identification code is user information provided by the operating system (e.g., personal information of the first user set in the Microsoft Windows operating system console), such as "Peter"; the information processing device transmits "Peter" to the first transmission end device 1210 as the first identification code. For another example, the source of the first video data Vid1 is an information processing device (e.g., a notebook computer) having a camera thereon to shoot a portrait of the first user; the information processing device transmits the portrait of the first user to the first transmission end device 1210 as the first identification code. For another example, the source of the first video data Vid1 is an information processing device (e.g., a notebook computer), which is connected to the Internet and has an Internet IP address; the information processing device transmits the Internet IP address to the first transmission end device 1210 as the first identification code. For another example, the first transmission end device 1210 has a factory hardware serial number, and the first identification code is the factory hardware serial number of the first transmission end device 1210. For another example, the information processing device executes a communication software (e.g., Line, Skype, etc.), and the information processing device obtains the personal information of the logged-in user, such as "Peter"; the information processing device transmits "Peter" to the first transmission end device 1210 as the first identification code. Any of the above-mentioned information that can identify the information processing device can be used as the first identification code. When the first identification code is "Peter", the factory hardware serial number or the Internet IP address, the first identification image is the image of the above-mentioned text. When the first identification code is the portrait of the first user, the first identification image is the portrait of the first user.

[0059] The method for identifying the source of a video signal of an embodiment of the present invention and the wireless presentation system using the method enable conference participants to easily understand which user is the source of the video signal in the first video area 362 in the split screen of the display device 360 ​​by means of the corresponding relationship between (1) the first video area 362 in the display screen of the display device 360, (2) the first identification image in the first identification area 464 adjacent to the first video area 362 in the display screen of the display device 360, and (3) the first identification image displayed correspondingly by the first indicator device 316 on the first transmitting terminal device 310. On the other hand, the user input device 870 detects the position where the user performs input operation in the split screen of the display device 860. When the receiving end control unit 824 determines that the position where the user performs the operation is located in the first video area 862, the receiving end control unit 824 sends a prompt command to the first transmitting end device 810, so that the first transmitting end device 810 sends a first sound and light signal, so that the participants in the meeting can easily understand which user is the source of the video signal of the current user input operation position. In this way, the problem of the traditional practice that the participants in the meeting cannot identify the information processing device of which presenter the source of each video signal in the split screen of the current display device is, can be avoided. It helps the participants in the meeting to quickly identify the corresponding video signal source presenter for a certain screen in the split screen, and then raise questions for discussion.

[0060] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A method for identifying the source of a video signal, characterized in that: include: When the receiving control unit in the receiving device receives the first video data and the first identification code transmitted by the first transmitting device, and simultaneously receives the second video data and the second identification code transmitted by the second transmitting device, the receiving control unit performs the following steps: The receiving end control unit synthesizes the first video data and the first identification image corresponding to the first identification code into first synthesized video data; The receiving end control unit synthesizes the second video data and the second identification image corresponding to the second identification code into second synthesized video data; and The receiving end control unit synthesizes the first synthesized video data and the second synthesized video data into split-screen video data, and outputs the split-screen video data to a display device; When the receiving-end control unit receives the user operation position provided by the user input device and determines that the user operation position is located in the first video area, the receiving-end control unit sends a prompt instruction to the first transmitting-end device, so that the first indicating device of the first transmitting-end device sends a first sound and light signal; when the receiving-end control unit receives the user operation position provided by the user input device and determines that the user operation position is located in the second video area, the receiving-end control unit sends a prompt instruction to the second transmitting-end device, so that the second indicating device of the second transmitting-end device sends a second sound and light signal, and the second sound and light signal is different from the first sound and light signal.

2. The method for identifying the source of a video signal as claimed in claim 1, wherein: Also includes: When the receiving-end control unit receives the first video data transmitted by the first transmitting-end device, but the receiving-end control unit does not receive the second video data transmitted by the second transmitting-end device, the following steps are performed: the receiving-end control unit does not perform the step of synthesizing the first video data with the first identification image, and outputs the first video data to the display device.

3. The method for identifying the source of a video signal as claimed in claim 1, wherein: Also includes: When the first synthetic video data is displayed in the display device, the first synthetic video data corresponds to the first video area and the first identification area. The first video area is adjacent to the first identification area. The first video area displays the first video data, and the first identification area displays the first identification image.

4. A method for identifying the source of a video signal, characterized in that: include: When the receiving control unit in the receiving device simultaneously receives the first video data transmitted by the first transmitting device and the second video data transmitted by the second transmitting device, the following steps are performed: The receiving end control unit notifies the first transmitting end control unit in the first transmitting end device to synthesize the first video data and the first identification image into first synthesized video data, wherein the first identification image corresponds to the first identification code; The receiving end control unit notifies the second transmitting end control unit in the second transmitting end device to synthesize the second video data and the second identification image into second synthesized video data, wherein the second identification image corresponds to the second identification code; Transmitting the first composite video data to the receiving end control unit via the first transmitting end device; transmitting the second composite video data to the receiving end control unit via the second transmitting end device; and The receiving end control unit synthesizes the first synthesized video data and the second synthesized video data into split-screen video data, and outputs the split-screen video data to a display device.

5. The method for identifying the source of a video signal as claimed in claim 4, wherein: Also includes: When the receiving end control unit receives the first video data transmitted by the first transmitting end device, but the receiving end control unit does not receive the second video data transmitted by the second transmitting end device, the following steps are performed: The receiving end control unit notifies the first transmitting end control unit to stop synthesizing the first video data and the first identification image into the first synthesized video data; transmitting the first video data to the receiving end control unit via the first transmitting end device; and The receiving end control unit displays the first video data on the display device.

6. The method for identifying the source of a video signal as claimed in claim 4, wherein: Also includes: When the first synthetic video data is displayed in the display device, the first synthetic video data corresponds to a first video area and a first identification area, the first video area is adjacent to the first identification area, the first video area displays the first video data, and the first identification area displays the first identification image.

7. The method for identifying the source of a video signal according to claim 1 or 4, wherein: The first identification code is selected from one of the group consisting of a hardware serial number, user input information and a network address.

8. The method for identifying the source of a video signal as claimed in claim 7, wherein: The source of the first video data is an information processing device, the information processing device executes an operating system, and the first identification code is user information provided by the operating system.

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