CN117676060A - Video signal transmission circuit and system - Google Patents
Video signal transmission circuit and system Download PDFInfo
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Abstract
The invention discloses a video signal transmission circuit and a video signal transmission system. The video signal transmission circuit provided by the embodiment of the invention comprises an input module, a control module and a control module, wherein the input module is used for inputting multimedia signals; at least two data channels connected with the input module; the control module is connected with the input module and at least one data channel and is used for outputting a first control signal and a second control signal according to the resolution information of the data channel; the input module is also used for selecting a target data channel to conduct according to the first control signal; the output module is connected with the input module and the control module and is used for conducting the target data channel according to the second control signal and outputting a multimedia signal; the input module is also used for acquiring display parameters of the target data channel; the display parameters are used to adjust resolution information of the multimedia signal. According to the technical scheme, the control module is arranged to select the target data channel to be conducted, so that the display parameters of the specific data channel are obtained.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a video signal transmission circuit and system.
Background
The extended display identification data (Extended Display Identification Data, EDID) is a video electronic standard data format in which parameters relating to the display and its capabilities are stored. However, when the HDMI (High Definition Multimedia Interface, all-digital high-definition multimedia interface) device acquires EDID through a plurality of display data channels, it is generally only possible to acquire EDID of one channel with low resolution, and it is difficult to select a display data channel to acquire EDID. Therefore, how to obtain the EDID of the specified channel becomes a problem to be solved.
Disclosure of Invention
The invention provides a video signal transmission circuit and a video signal transmission system, which are used for solving the problem that the EDID is difficult to obtain by selecting a display data channel in the prior art.
According to an aspect of the present invention, there is provided a video signal transmission circuit including:
the input module is used for inputting multimedia signals;
at least two data channels connected with the input module;
the control module is connected with the input module and at least one data channel and is used for outputting a first control signal and a second control signal according to the resolution information of the data channel;
the input module is also used for selecting a target data channel to conduct according to the first control signal;
the output module is connected with the input module and the control module and is used for conducting the target data channel according to the second control signal and outputting a multimedia signal;
the input module is also used for acquiring display parameters of the target data channel; the display parameters are used to adjust resolution information of the multimedia signal.
Optionally, the video signal transmission circuit further includes:
a first transmission unit and a second transmission unit;
the input end of the first transmission unit is connected with the input module, the output end of the first transmission unit is connected with the control module, the input end of the second transmission unit is connected with the input module, and the output end of the second transmission unit is connected with the output module;
the first transmission unit is used for outputting the multimedia signal to the control module when being conducted, and the second transmission unit is used for outputting the multimedia signal to the output module when being conducted;
the data channel comprises a first transmission unit and a second transmission unit.
Optionally, the first transmission unit includes:
a first transmission channel and a first information channel;
the input end of the first transmission channel is connected with the input module, the output end of the first transmission channel is connected with the control module, the input end of the first information channel is connected with the input module, and the output end of the first information channel is connected with the control module;
the first transmission channel is used for outputting the multimedia signal to the control module when being conducted, and the first information channel is used for being conducted, so that the input module obtains the display parameters of the first information channel.
Optionally, the first transmission unit further includes:
a switching unit;
the switch unit is connected with the first information channel and the control module and is used for conducting according to a third control signal to enable the first information channel to be conducted or disconnected according to the third control signal to enable the first information channel to be disconnected;
the control module is also used for outputting a third control signal according to the resolution information of the data channel.
Optionally, the second transmission unit includes:
a second transmission channel and a second information channel;
the input end of the second transmission channel is connected with the input module, the output end of the second transmission channel is connected with the output module, the input end of the second information channel is connected with the input module, and the output end of the second information channel is connected with the output module;
the second transmission channel is used for outputting the multimedia signal to the output module when being conducted, and the second information channel is used for being conducted, so that the input module obtains the display parameters of the second information channel.
Optionally, the control module includes:
a control unit and a third transmission channel;
the third transmission channel is connected between the control unit and the output module, and the control unit is connected with the input module, the first transmission unit and the output module;
the control unit is used for outputting a first control signal, a second control signal and/or a third control signal according to the resolution information of the data channel, modulating the multimedia signal output by the first transmission channel, outputting the modulated multimedia signal, and outputting the modulated multimedia signal to the output module by the third transmission channel.
Optionally, the control unit includes:
a first signal port, a second signal port, and a third signal port;
the first signal port is connected with the input module, the second signal port is connected with the output module, and the third signal port is connected with the switch unit;
the first signal port is used for outputting a first control signal, the second signal port is used for outputting a second control signal, and the third signal port is used for outputting a third control signal;
the first control signal is used for controlling the input module to select the target data channel to be conducted, the second control signal is used for controlling the output module to conduct the target data channel, and the third control signal is used for controlling the on and off of the switch unit.
Optionally, the output module includes:
a first output port and a second output port;
the first output port is connected with the second transmission channel, and the second output port is connected with the third transmission channel;
the first output port is used for conducting according to the second control signal and outputting the multimedia signal, and the second output port is used for conducting according to the second control signal and outputting the modulated multimedia signal.
In a second aspect, an embodiment of the present invention provides a video signal transmission system, including:
a master video signal transmission circuit and at least one slave video signal transmission circuit in cascade; the main video signal transmission circuit includes the video signal transmission circuit of any one of the above; the slave video signal transmission circuit includes the video signal transmission circuit of any one of the above;
the main video signal transmission circuit is used for connecting with an output device of the multimedia signal;
the main video signal transmission circuit is also used for modulating the multimedia signal and outputting the modulated multimedia signal;
the slave video signal transmission circuit is connected with the master video signal transmission circuit and is used for receiving and transmitting the modulated multimedia signal.
Optionally, the main video signal transmission circuit is further configured to select a data channel connected to the control module as a target data channel for conduction, and control the output module to conduct with the target data channel;
the slave video signal transmission circuit is used for selecting a data channel connected with the output module as a target data channel to conduct and controlling the output module to conduct with the target data channel.
The video signal transmission circuit of the embodiment of the invention comprises an input module, at least two data channels connected with the input module, a control module and an output module. The control module is connected with the input module and at least one data channel, and the output module is connected with the input module and the control module. The input module acquires an input multimedia signal and acquires display parameters of a target data channel. The control module outputs a first control signal and a second control signal according to the resolution information of the data channel. The input module selects the target data channel to be conducted according to the first control signal, and the output module conducts the target data channel according to the second control signal and outputs the multimedia signal. The video signal transmission circuit of the embodiment selects the target data channel in the plurality of data channels to be conducted through the setting control module, so that the input module obtains the display parameters of the target data channel, and the effect of obtaining the display parameters of the specific data channel is achieved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a video signal transmission circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another video signal transmission circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a switch unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a video signal transmission system according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of a video signal transmission circuit according to an embodiment of the present invention. Referring to fig. 1, a video signal transmission circuit provided in an embodiment of the present invention includes an input module 10, where the input module 10 is used for inputting a multimedia signal. At least two data channels connected to the input module 10. The control module 20, the control module 20 is connected with the input module 10 and at least one data channel, and the control module 20 is used for outputting a first control signal and a second control signal according to the resolution information of the data channel. The input module 10 is further configured to select a target data channel to be turned on according to the first control signal. The output module 30, the output module 30 is connected with the input module 10 and the control module 20, and the output module 30 is used for conducting the target data channel according to the second control signal and outputting the multimedia signal. The input module 10 is further configured to obtain a display parameter of the target data channel; the display parameters are used to adjust resolution information of the multimedia signal.
Specifically, the video signal transmission circuit may be connected to a terminal device that outputs a multimedia signal to obtain the multimedia signal, or may be cascaded with other video signal transmission circuits, and only is responsible for transmitting the multimedia signal, where the type of the terminal device may be a computer, and the type of the multimedia signal may be an HDMI signal. The terminal device inputs the multimedia signal to the video signal transmission circuit through the input module 10, the input module 10 is connected with a plurality of data channels, and display parameters capable of adjusting resolution information of the multimedia signal, namely EDID, are stored in each data channel. The control module 20 may control the input module 10 to select the target data channel to be turned on according to the resolution information of the device and each data channel connected to the video signal transmission circuit.
When the video signal transmission circuit is connected to the terminal device, the input module 10 needs to acquire the display parameters of the data channel connected to the control module 20 to adjust the resolution information of the multimedia signal. At this time, the control module 20 outputs a first control signal according to the resolution information of the data channel connected to itself, the input module 10 selects the data channel connected to the control module 20 to be turned on according to the first control signal, and outputs a multimedia signal to the control module 20 after obtaining the display parameter of the data channel. The control module 20 outputs a second control signal, and the output module 30 conducts the output port with the data channel according to the second control signal and outputs a multimedia signal.
When the video signal transmission circuit is connected to other video signal transmission circuits, the input module 10 needs to acquire the display parameters of the data channel connected to the control output to adjust the resolution information of the multimedia signal. At this time, the control module 20 outputs a first control signal according to the resolution information of the data channel connected to the output module 30, and the input module 10 selects the data channel connected to the output module 30 to be turned on according to the first control signal, and outputs the multimedia signal to the output module 30 after obtaining the display parameter of the data channel. The control module 20 outputs a second control signal, and the output module 30 conducts the output port with the data channel according to the second control signal and outputs a multimedia signal. The output module 30 may output the multimedia signal to a display device to display image information.
Illustratively, when the video signal transmission circuit is connected to the terminal device, the control module 20 outputs a first control signal and a second control signal according to the resolution information of the data channel connected to itself, the input module 10 selects the data channel connected to the control module 20 to be turned on according to the first control signal, and the output module 30 turns on the output port to the data channel according to the second control signal. After the input module 10 obtains the display parameters of the data channel, the multimedia signal is output to the control module 20 through the data channel, and the control module 20 outputs the multimedia signal to the output module 30 and outputs the multimedia signal through the output port.
When the video signal transmission circuit is connected with other video signal transmission circuits, the control module 20 outputs a first control signal and a second control signal according to the resolution information of the data channel connected with the output module 30, the input module 10 selects the data channel connected with the output module 30 to be conducted according to the first control signal, and the output module 30 conducts the output port with the data channel according to the second control signal. The input module 10 obtains the display parameters of the data channel, and then outputs the multimedia signal to the output module 30 and outputs the multimedia signal through the output port. The output module 30 may output the multimedia signal to a display device to display image information.
According to the video signal transmission circuit provided by the embodiment of the invention, the control module 20 can select the target data channel in the plurality of data channels to be conducted by arranging the plurality of data channels connected with the input module 10, so that the input module 10 can acquire the display parameters of the target data channel, and the effect of acquiring the display parameters of the specific data channel is realized.
Optionally, fig. 2 is a schematic structural diagram of another video signal transmission circuit according to an embodiment of the present invention. On the basis of the above-described embodiment, referring to fig. 2, the video signal transmission circuit further includes a first transmission unit 40 and a second transmission unit 50. The input end of the first transmission unit 40 is connected with the input module 10, the output end of the first transmission unit 40 is connected with the control module 20, the input end of the second transmission unit 50 is connected with the input module 10, and the output end of the second transmission unit 50 is connected with the output module 30. The first transmission unit 40 is used for outputting the multimedia signal to the control module 20 when turned on, and the second transmission unit 50 is used for outputting the multimedia signal to the output module 30 when turned on. Wherein the data channel comprises a first transmission unit 40 and a second transmission unit 50.
Specifically, the first transmission unit 40 may be connected between the input module 10 and the control module 20 as a data channel, the second transmission unit 50 may be connected between the input module 10 and the output module 30 as a data channel, so as to realize selection of different data channels by the input module 10, and the resolutions of the first transmission unit 40 and the second transmission unit 50 are different. When the first transmission unit 40 is turned on, the input module 10 may acquire the display parameters of the first transmission unit 40, and output the multimedia signal to the control module 20 through the first transmission unit 40. When the second transmission unit 50 is turned on, the input module 10 may acquire the display parameters of the second transmission unit 50, and output the multimedia signal to the output module 30 through the second transmission unit 50.
Alternatively, with continued reference to fig. 2, the first transmission unit 40 includes a first transmission channel 41 and a first information channel 42, based on the above-described embodiments. The input end of the first transmission channel 41 is connected with the input module 10, the output end of the first transmission channel 41 is connected with the control module 20, the input end of the first information channel 42 is connected with the input module 10, and the output end of the first information channel 42 is connected with the control module 20. The first transmission channel 41 is used for outputting the multimedia signal to the control module 20 when conducting, and the first information channel 42 is used for conducting, so that the input module 10 obtains the display parameters of the first information channel 42.
Specifically, the first transmission unit 40 includes a first transmission channel 41 for transmitting signals and a first information channel 42 for storing information. When the first transmission unit 40 is turned on, the first transmission channel 41 and the first information channel 42 are turned on, the input unit obtains the display parameters stored in the first information channel 42 through the first information channel 42, and after adjusting the resolution information of the multimedia signal according to the display parameters, the input unit outputs the multimedia signal to the control module 20 through the first transmission channel 41. Illustratively, the first information channel 42 may be a DDC (Display Data Channel ).
Optionally, fig. 3 is a schematic structural diagram of a switch unit according to an embodiment of the present invention. On the basis of the above-described embodiment, referring to fig. 2 and 3, the first transmission unit 40 further includes a switching unit 43. The switching unit 43 is connected to the first information channel 42 and the control module 20, and the switching unit 43 is configured to turn on the first information channel 42 according to a third control signal or turn off the first information channel 42 according to the third control signal. The control module 20 is further configured to output a third control signal according to the resolution information of the data channel.
Specifically, the first transmission unit 40 is further provided with a switching unit 43, and the switching unit 43 may be used to control the on and off of the first information channel 42. The control module 20 may send a third control signal according to the data channel that needs to be turned on and the resolution information of each data channel, so as to control the switching state of the switching unit 43.
When the video signal transmission circuit is connected to the terminal device, the input module 10 turns on the first transmission unit 40 according to the first control signal, and the switch unit 43 turns on the first information channel 42 according to the third control signal, so that the input module 10 can obtain the display parameter of the first information channel 42.
When the video signal transmission circuit is connected to other video signal transmission circuits, the input module 10 turns on the second transmission unit 50 according to the first control signal, and if the resolution information of the first transmission unit 40 is greater than the resolution information of the second transmission unit 50, the switch unit 43 can be turned on or off according to the third control signal because the input module 10 preferentially obtains the display parameters of the second transmission unit 50 with lower resolution information. If the resolution information of the first transmission unit 40 is smaller than the resolution information of the second transmission unit 50, the switching unit 43 is turned off according to the third control signal, so that the input module 10 obtains the display parameters of the second transmission unit 50. This arrangement can further improve the accuracy of selecting the target data channel.
Fig. 3 exemplarily shows a structure of the switching unit 43, the switching unit 43 includes a first switching tube Q1 and a second switching tube Q2, the first information channel 42 includes a channel SCL and a channel SDA, and the first switching tube Q1 and the second switching tube Q2 acquire a third control signal through the control terminal CTL. The first information channel 42 is turned on when the first and second switching transistors Q1 and Q2 are turned on according to the third control signal, and the first information channel 42 is turned off when the first and second switching transistors Q1 and Q2 are turned off according to the third control signal.
Alternatively, with continued reference to fig. 2, the second transmission unit 50 includes a second transmission channel 51 and a second information channel 52, based on the above-described embodiments. The input end of the second transmission channel 51 is connected with the input module 10, the output end of the second transmission channel 51 is connected with the output module 30, the input end of the second information channel 52 is connected with the input module 10, and the output end of the second information channel 52 is connected with the output module 30. The second transmission channel 51 is used for outputting the multimedia signal to the output module 30 when conducting, and the second information channel 52 is used for conducting, so that the input module 10 obtains the display parameters of the second information channel 52.
Specifically, the second transmission unit 50 includes a second transmission channel 51 for transmitting signals and a second information channel 52 for storing information. When the second transmission unit 50 is turned on, the second transmission channel 51 and the second information channel 52 are turned on, the input unit obtains the display parameters stored in the second information channel 52 through the second information channel 52, adjusts the resolution information of the multimedia signal according to the display parameters, and then outputs the multimedia signal to the output module 30 through the second transmission channel 51. The second information channel 52 may be, for example, a DDC (Display Data Channel ).
Optionally, with continued reference to fig. 2 based on the above embodiment, the control module 20 includes a control unit 21 and a third transmission channel 22. The third transmission channel 22 is connected between the control unit 21 and the output module 30, and the control unit 21 is connected with the input module 10, the first transmission unit 40 and the output module 30. The control unit 21 is configured to output a first control signal, a second control signal, and/or a third control signal according to resolution information of the data channel, the control unit 21 is further configured to modulate the multimedia signal output by the first transmission channel 41, output the modulated multimedia signal, and the third transmission channel 22 is configured to output the modulated multimedia signal to the output module 30.
Specifically, the control unit 21 is connected to the input module 10, and may output a first control signal to the input module 10 to control the input module 10 to select the first transmission unit 40 and/or the second transmission unit 50 to be turned on. The control unit 21 is connected to the output module 30, and may output a second control signal to the output module 30 to control the output port of the output module 30 to be in communication with the second transmission channel 51 or the third transmission channel 22. The control unit 21 is connected to the switching unit 43, and may output a third control signal to the switching unit 43 according to resolution information of the first and second transmission units 40 and 50 to control the switching unit 43 to be turned on or off.
The control unit 21 is further configured to modulate the multimedia signal output by the first transmission channel 41, where the type of modulation may include a superposition process and/or a scaling process, etc. The third transmission channel 22 may output the multimedia signal modulated by the control unit 21 to the output module 30, and further to the display device.
Optionally, with continued reference to fig. 2 on the basis of the above-described embodiment, the control unit 21 includes a first signal port a, a second signal port B, and a third signal port C. The first signal port a is connected to the input module 10, the second signal port B is connected to the output module 30, and the third signal port C is connected to the switching unit 43. The first signal port A is used for outputting a first control signal, the second signal port B is used for outputting a second control signal, and the third signal port C is used for outputting a third control signal. The first control signal is used for controlling the input module 10 to select the target data channel to be turned on, the second control signal is used for controlling the output module 30 to be turned on, and the third control signal is used for controlling the switch unit 43 to be turned on and off.
Specifically, the control unit 21 includes a plurality of ports for outputting control signals, and the first signal port a may output a first control signal to the input module 10 to control the input module 10 to select the first transmission unit 40 and/or the second transmission unit 50 to be turned on. The second signal port B may output a second control signal to the output module 30 to control the output module 30 to be in communication with the second transmission channel 51 or the third transmission channel 22. The third signal port C may output a third control signal to the switching unit 43 to control the switching unit 43 to be turned on or off. Illustratively, the first, second and third signal ports a, B and C may be GPIOs (General Purpose Input Output, port expanders).
Optionally, with continued reference to fig. 2 based on the above embodiment, the output module 30 includes a first output port D and a second output port E. The first output port D is connected to the second transmission channel 51, and the second output port E is connected to the third transmission channel 22. The first output port D is used for being conducted according to the second control signal to output the multimedia signal, and the second output port E is used for being conducted according to the second control signal to output the modulated multimedia signal.
Specifically, the output module 30 includes a first output port D for connection with the second transmission channel 51 and a second output port E for connection with the third transmission channel 22. When the first output port D is turned on according to the second control signal, the multimedia signal is output to the first output port D through the second transmission channel 51, and further output to the display device. When the second output port E is turned on according to the second control signal, the multimedia signal is output to the second output port E through the third transmission channel 22, and further output to the display device. Illustratively, the input module 10 may be an HDMI one-in-two chip LT86102 and the output module 30 may be an HDMI one-out-of-two chip LT8631.
Illustratively, when the video signal transmission circuit is connected to the terminal device, the control unit 21 outputs the first control signal, the second control signal and the third control signal through the first signal port a, the second signal port B and the third signal port C, the input module 10 selects the first transmission unit 40 to be turned on according to the first control signal, the output module 30 turns on the second output port E and the third transmission channel 22 according to the second control signal, and the switching unit 43 turns on according to the third control signal. After the input module 10 obtains the display parameters of the first information channel 42, the multimedia signal is output to the control unit 21 through the first transmission channel 41, and the control unit 21 modulates the multimedia signal, and then outputs the multimedia signal to the output module 30 through the third transmission channel 22 and outputs the multimedia signal through the second output port E.
When the video signal transmission circuit is connected to other video signal transmission circuits, the control unit 21 outputs a first control signal, a second control signal and a third control signal through the first signal port a, the second signal port B and the third signal port C, the input module 10 selects the second transmission unit 50 to be turned on according to the first control signal, and the output module 30 turns on the first output port D and the second transmission channel 51 according to the second control signal. If the resolution information of the first transmission unit 40 is greater than the resolution information of the second transmission unit 50, the switching unit 43 is turned on according to the third control signal. If the resolution information of the first transmission unit 40 is smaller than the resolution information of the second transmission unit 50, the switching unit 43 is turned off according to the third control signal. After the input module 10 obtains the display parameters of the second information channel 52, the multimedia signal is output to the output module 30 through the second transmission channel 51 and is output through the first output port D. The output module 30 may output the multimedia signal to a display device to display image information.
Optionally, fig. 4 is a schematic structural diagram of a video signal transmission system according to an embodiment of the present invention. On the basis of the above-described embodiments, referring to fig. 2 and 4, the video signal transmission system 200 includes a master video signal transmission circuit 110 and at least one slave video signal transmission circuit 120 in cascade. The video signal transmission circuit 100 of any one of the above-described master video signal transmission circuit 110, and the video signal transmission circuit 100 of any one of the above-described slave video signal transmission circuit 120. The main video signal transmission circuit 110 is used for connecting with an output device of the multimedia signal, and the main video signal transmission circuit 110 is also used for modulating the multimedia signal and outputting the modulated multimedia signal. The slave video signal transmission circuit 120 is connected to the master video signal transmission circuit 110, and the slave video signal transmission circuit 120 is configured to receive and transmit the modulated multimedia signal.
In particular, a plurality of video signal transmission circuits may be cascaded to form video signal transmission system 200. The video signal transmission circuit connected with the output device of the multimedia signal is a master video signal transmission circuit 110, and the slave video signal transmission circuit 120 is cascaded at the signal output end of the master video signal transmission circuit 110.
The master video signal transmission circuit 110 modulates the multimedia signal through the control module 20, and the output module 30 outputs the modulated multimedia signal to the slave video signal transmission circuit 120. The slave video signal transmission circuit 120 is configured to transmit the modulated multimedia signal, and the output module 30 outputs the modulated multimedia signal to the next slave video signal transmission circuit 120 in cascade until output to the display device. The video signal transmission system 200 can further increase the transmission distance of the multimedia signal.
Optionally, with continued reference to fig. 2 and 4, the main video signal transmission circuit 110 is further configured to select the data channel connected to the control module 20 as the target data channel conduction, and control the output module 30 to conduct with the target data channel. The slave video signal transmission circuit 120 is used for selecting a data channel connected to the output module 30 as a target data channel to be conducted, and controlling the output module 30 to be conducted with the target data channel.
Specifically, the main video signal transmission circuit 110 may output the first control signal and the second control signal through the control module 20, control the input module 10 to select the first transmission unit 40 to be turned on, and output the multimedia signal to the control module 20 through the first transmission unit 40, and then output the multimedia signal through the second output port E.
The slave video signal transmission circuit 120 may output the first control signal and the second control signal through the control module 20, control the input module 10 to select the second transmission unit 50 to be turned on, and output the multimedia signal to the output module 30 through the second transmission unit 50, and then output through the first output port D. The slave video signal transmission circuit 120 may further output a third control signal through the control module 20, and control the switching unit 43 to be turned off, so that the multimedia signal is output to the output module 30 through the second transmission unit 50 and further output through the first output port D.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A video signal transmission circuit, comprising:
the input module is used for inputting multimedia signals;
at least two data channels connected with the input module;
the control module is connected with the input module and at least one data channel and is used for outputting a first control signal and a second control signal according to the resolution information of the data channel;
the input module is also used for selecting a target data channel to be conducted according to the first control signal;
the output module is connected with the input module and the control module and is used for conducting the target data channel according to the second control signal and outputting the multimedia signal;
the input module is also used for acquiring display parameters of the target data channel; the display parameters are used to adjust resolution information of the multimedia signal.
2. The circuit of claim 1, wherein the video signal transmission circuit further comprises:
a first transmission unit and a second transmission unit;
the input end of the first transmission unit is connected with the input module, the output end of the first transmission unit is connected with the control module, the input end of the second transmission unit is connected with the input module, and the output end of the second transmission unit is connected with the output module;
the first transmission unit is used for outputting the multimedia signal to the control module when being conducted, and the second transmission unit is used for outputting the multimedia signal to the output module when being conducted;
wherein the data channel comprises the first transmission unit and the second transmission unit.
3. The circuit of claim 2, wherein the first transmission unit comprises:
a first transmission channel and a first information channel;
the input end of the first transmission channel is connected with the input module, the output end of the first transmission channel is connected with the control module, the input end of the first information channel is connected with the input module, and the output end of the first information channel is connected with the control module;
the first transmission channel is used for outputting the multimedia signal to the control module when the first transmission channel is conducted, and the first information channel is used for conducting, so that the input module obtains the display parameters of the first information channel.
4. A circuit according to claim 3, wherein the first transmission unit further comprises:
a switching unit;
the switch unit is connected with the first information channel and the control module, and is used for conducting according to a third control signal, conducting the first information channel or disconnecting according to the third control signal, and disconnecting the first information channel;
the control module is also used for outputting a third control signal according to the resolution information of the data channel.
5. The circuit of claim 4, wherein the second transmission unit comprises:
a second transmission channel and a second information channel;
the input end of the second transmission channel is connected with the input module, the output end of the second transmission channel is connected with the output module, the input end of the second information channel is connected with the input module, and the output end of the second information channel is connected with the output module;
the second transmission channel is used for outputting the multimedia signal to the output module when being conducted, and the second information channel is used for being conducted, so that the input module obtains the display parameters of the second information channel.
6. The circuit of claim 5, wherein the control module comprises:
a control unit and a third transmission channel;
the third transmission channel is connected between the control unit and the output module, and the control unit is connected with the input module, the first transmission unit and the output module;
the control unit is configured to output the first control signal, the second control signal, and/or the third control signal according to resolution information of the data channel, and is further configured to modulate the multimedia signal output by the first transmission channel, and output the modulated multimedia signal, and the third transmission channel is configured to output the modulated multimedia signal to the output module.
7. The circuit of claim 6, wherein the control unit comprises:
a first signal port, a second signal port, and a third signal port;
the first signal port is connected with the input module, the second signal port is connected with the output module, and the third signal port is connected with the switch unit;
the first signal port is used for outputting a first control signal, the second signal port is used for outputting a second control signal, and the third signal port is used for outputting a third control signal;
the first control signal is used for controlling the input module to select a target data channel to be conducted, the second control signal is used for controlling the output module to be conducted, and the third control signal is used for controlling the switch unit to be conducted and disconnected.
8. The circuit of claim 6, wherein the output module comprises:
a first output port and a second output port;
the first output port is connected with the second transmission channel, and the second output port is connected with the third transmission channel;
the first output port is used for being conducted according to the second control signal and outputting the multimedia signal, and the second output port is used for being conducted according to the second control signal and outputting the modulated multimedia signal.
9. A video signal transmission system, comprising:
a master video signal transmission circuit and at least one slave video signal transmission circuit in cascade; the main video signal transmission circuit includes the video signal transmission circuit of any one of claims 1 to 8; the slave video signal transmission circuit comprising the video signal transmission circuit of any one of claims 1 to 8;
the main video signal transmission circuit is used for being connected with an output device of the multimedia signal;
the main video signal transmission circuit is also used for modulating the multimedia signal and outputting the modulated multimedia signal;
the slave video signal transmission circuit is connected with the master video signal transmission circuit and is used for receiving and transmitting the modulated multimedia signal.
10. The video signal transmission system of claim 9, wherein,
the main video signal transmission circuit is also used for selecting a data channel connected with the control module as a target data channel to conduct and controlling the output module to conduct with the target data channel;
the slave video signal transmission circuit is used for selecting a data channel connected with the output module as a target data channel to conduct and controlling the output module to conduct with the target data channel.
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| CN202410138531.0A CN117676060A (en) | 2024-02-01 | 2024-02-01 | Video signal transmission circuit and system |
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| CN202410138531.0A CN117676060A (en) | 2024-02-01 | 2024-02-01 | Video signal transmission circuit and system |
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