CN108055482B - Signal loop-out device, video acquisition box and video coding box - Google Patents
Signal loop-out device, video acquisition box and video coding box Download PDFInfo
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- CN108055482B CN108055482B CN201711394407.7A CN201711394407A CN108055482B CN 108055482 B CN108055482 B CN 108055482B CN 201711394407 A CN201711394407 A CN 201711394407A CN 108055482 B CN108055482 B CN 108055482B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to a signal loop-out device, a video acquisition box and a video coding box, wherein the signal loop-out device comprises: the first output end of the demultiplexer is connected with the first input end of the multiplexer, the second output end of the demultiplexer is connected with the input end of the distributor, the first output end of the distributor is connected with the second input end of the multiplexer, the demultiplexer is configured to send signals to the second output end when a signal transmission channel between the demultiplexer and the distributor is communicated, the signals are sent to the first output end when the signal transmission channel between the demultiplexer and the distributor is disconnected, the multiplexer is configured to receive the signals of the second input end when the signal transmission channel between the multiplexer and the distributor is communicated, and the signals of the first input end are received when the signal transmission channel between the multiplexer and the distributor is disconnected. When the distributor stops working, the signals received by the device are sent to the multiplexer through the demultiplexer for output, and at least one path of signals can be ensured to be output for use.
Description
Technical Field
The invention relates to the technical field of signal processing, in particular to a signal loop-out device, a video acquisition box and a video coding box.
Background
When the device processes the signal, the received signal may need to be distributed to a plurality of different lines for use, which requires splitting the received signal to split the received signal into multiple paths of signals.
The traditional signal loop-out function is based on the premise that the whole equipment loaded by a signal loop-out device is powered on, a received signal is copied into N paths of signals to be output by using a distributor (1: N Splitter) which is divided into 1 to N (N is an integer and N is more than or equal to 2), and the loop-out of the signal is realized.
Disclosure of Invention
Based on this, it is necessary to provide a video signal looping-out device, a video capture box and a video encoding box, aiming at the problem that the signal cannot be output when the distributor stops working in the conventional signal looping-out device.
A signal looping-out apparatus comprising: a demultiplexer, a multiplexer and a distributor;
the first output end of the demultiplexer is connected with the first input end of the multiplexer, the second output end of the demultiplexer is connected with the input end of the distributor, and the first output end of the distributor is connected with the second input end of the multiplexer;
the demultiplexer is configured to send the received signal to the second output end of the demultiplexer when the signal transmission channel between the demultiplexer and the distributor is connected, and send the received signal to the first output end of the demultiplexer when the signal transmission channel between the demultiplexer and the distributor is disconnected; the multiplexer is configured to receive a signal at the second input of the multiplexer when the signal transmission channel between the multiplexer and the distributor is connected, and to receive a signal at the first input of the multiplexer when the signal transmission channel between the multiplexer and the distributor is disconnected.
According to the signal loop-out device, when the distributor works, the signal transmission channels between the demultiplexer and the distributor are communicated, the signal transmission channels between the multiplexer and the distributor are communicated, signals received by the device are sent to the distributor through the demultiplexer, the distributor distributes the signals into multiple paths, the multiple paths of the signals are guaranteed to be looped out, when the distributor stops working, the signal transmission channels between the demultiplexer and the distributor are disconnected, the signal transmission channels between the multiplexer and the distributor are disconnected, the signals received by the device are sent to the multiplexer through the demultiplexer and output through the output end of the multiplexer, at least one path of signals can be output and used when the distributor stops working, and the signal loop-out when the distributor stops working is achieved.
In one embodiment, the input of the demultiplexer is connected to a signal input interface.
In one embodiment, the output of the multiplexer is connected to the first signal output interface.
In one embodiment, the demultiplexer is configured to output the received signal from a selected one of the M paths. In one embodiment, the multiplexer is configured to output one selected from the K signals received by the K signal input terminals through the signal output terminal.
In one embodiment, the demultiplexer is a 1:2 demultiplexer and the multiplexer is a 2:1 multiplexer.
In one embodiment, the divider is a one-to-two divider, a first output terminal of the divider is connected to the second input terminal of the multiplexer, and a second output terminal of the divider is connected to the second signal output interface.
In one embodiment, the demultiplexer is configured to send the received signal to the second output of the demultiplexer when the distributor is powered up and to send the received signal to the first output of the demultiplexer when the distributor is powered down; the multiplexer is configured to receive a signal at the second input of the multiplexer when the splitter is powered on and to receive a signal at the first input of the multiplexer when the splitter is powered off.
According to the technical scheme of the embodiment, the demultiplexer and the multiplexer are configured to select the transmission channel for receiving and sending the signals according to whether the distributor is powered down, when the distributor is powered on, the signals received by the device are sent to the distributor through the demultiplexer, the distributor distributes the signals into multiple paths, and the multiple paths of the signals are ensured to be looped out. When only one signal is needed to be output, the signal can be received for use without opening the equipment loaded by the distributor, and the electric quantity consumption of the equipment is effectively saved.
In one embodiment, the power input terminals of the demultiplexer and the power input terminals of the multiplexer are respectively connected to an external power source, and the power input terminal of the distributor is connected to a device power source.
According to the technical scheme of the embodiment, the demultiplexer and the multiplexer are connected with the external power supply different from the equipment power supply, the external power supply is used for independently supplying power to the demultiplexer and the multiplexer, when the equipment is in a power-down state and the equipment power supply cannot supply power, the demultiplexer and the multiplexer can still be kept in a power-on state under the power supply of the external power supply, one path of signal transmission channel connected with the demultiplexer is ensured to be in a connected state, and therefore signal loop-out of one path of signal connected with the demultiplexer is achieved when the equipment is in power-down.
In one embodiment, the power input terminals of the demultiplexer and the power input terminals of the multiplexer are respectively connected with the power supply pins of the signal input interface.
According to the technical scheme of the embodiment, the characteristic that the signal input interface has power supply capacity is utilized, the power supply input ends of the demultiplexer and the multiplexer are respectively connected with the power supply pins of the signal input interface, an external power supply is introduced through the power supply pins of the signal input interface to supply power to the demultiplexer and the multiplexer, and the scheme is simple, convenient and fast in external power supply mode of the demultiplexer and the multiplexer and easy to achieve.
In another embodiment, the power input end of the demultiplexer and the power input end of the multiplexer are respectively connected with an external storage battery.
According to the technical scheme of the embodiment, the demultiplexer and the multiplexer are powered by the external storage battery, the power supply of the demultiplexer and the multiplexer does not depend on external equipment, the universality is better, and the storage battery has the advantages of stable power supply and easiness in replacement.
In one embodiment, the signal is an HDMI/DVI video signal, the signal input interface is an HDMI/DVI connector, and the first signal output interface is an HDMI/DVI connector.
In one embodiment, the signal input interface is connected with the video signal output terminal through a connecting wire; the connecting wire connects a power supply of the video signal output terminal to the signal input interface, and the signal input interface supplies power to the connected demultiplexer and the multiplexer.
According to the technical scheme of the embodiment, the power supply of the external video signal output terminal is introduced through the signal input interface, so that power is supplied to the demultiplexer and the multiplexer.
The invention also provides a video acquisition box, which comprises the signal loop-out device and a video processor, wherein the second output end of the distributor is connected with the video processor; the first signal output interface is connected with a first video playing terminal, and the video processor is in communication connection with a second video playing terminal.
When the distributor of the signal loop-out device works, signals received by the device are sent to the distributor through the demultiplexer, the distributor distributes the signals into multiple paths, one path of signals is sent to the video collection box to process video input signals, the other path of signals is sent to the first video playing terminal, the multiple paths of the signals are ensured to be looped out, when the distributor stops working, the signals received by the device are sent to the multiplexer through the demultiplexer and then sent to the first signal output interface, and the first video playing terminal can still play videos.
The invention also provides a video coding box, which comprises the signal loop-out device as described in any one of the above embodiments, and a video encoder, wherein the second output end of the distributor is connected with the video encoder; the first signal output interface is connected with a first video playing terminal, and the video encoder is in communication connection with a third video playing terminal.
When the distributor of the signal loop-out device works, signals received by the device are sent to the distributor through the demultiplexer, the distributor distributes the signals into multiple paths, one path of signals is sent to the video coding box to process video input signals, the other path of signals is sent to the first video playing terminal, the multiple paths of the signals are ensured to be looped out, when the distributor stops working, the signals received by the device are sent to the multiplexer through the demultiplexer and then sent to the first signal output interface, and the first video playing terminal can still play videos.
Drawings
Fig. 1 is a schematic structural diagram of a signal loop-out apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a signal looping-out apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a conventional signal looping-out apparatus;
fig. 4 is a schematic structural diagram of a signal loop-out device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a signal loop-out device according to an embodiment of the present invention, where the signal loop-out device includes: a demultiplexer 110, a multiplexer 120, and a distributor 130;
the first output 111 of the demultiplexer 110 is connected to the first input 121 of the multiplexer 120, the second output 112 of the demultiplexer 110 is connected to the input 131 of the distributor 130, and the first output 132 of the distributor 130 is connected to the second input 122 of the multiplexer 120;
wherein the demultiplexer 110 is configured to transmit the received signal to the second output terminal 112 of the demultiplexer 110 when the signal transmission channel between the demultiplexer 110 and the distributor 130 is connected, and transmit the received signal to the first output terminal 111 of the demultiplexer 110 when the signal transmission channel between the demultiplexer 110 and the distributor 130 is disconnected; the multiplexer 120 is configured to receive the signal of the second input terminal 122 of the multiplexer 120 when the signal transmission channel between the multiplexer 120 and the distributor 130 is connected, and to receive the signal of the first input terminal 121 of the multiplexer 120 when the signal transmission channel between the multiplexer 120 and the distributor 130 is disconnected.
In the above signal loop-out device, when the distributor 130 works, the signal transmission channels between the demultiplexer 110 and the distributor 130 are communicated, the signal transmission channels between the multiplexer 120 and the distributor 130 are communicated, the signal received by the device is sent to the distributor 130 through the demultiplexer 110, the distributor 130 distributes the signal into multiple paths, so as to realize the multi-path loop-out of the signal, when the distributor 130 stops working, the signal transmission channels between the demultiplexer 110 and the distributor 130 are disconnected, the signal transmission channels between the multiplexer 120 and the distributor 130 are disconnected, the signal received by the device is sent to the multiplexer 120 through the demultiplexer 110 and is output through the output end 124 of the multiplexer 120, so that at least one path of signal can be output and used when the distributor 130 stops working, and the signal loop-out when the distributor 130 stops working is realized.
In one embodiment, the input 114 of the demultiplexer 110 is connected to a signal input interface 140.
In one embodiment, output 124 of multiplexer 120 is coupled to first signal output interface 150.
In one embodiment, the port signaling configuration of the demultiplexer 110 and the multiplexer 120 may be implemented by configuring the port connections with I/O of the demultiplexer 110 and the multiplexer 120 by pulling down resistors. In another embodiment, the port signaling configuration of the demultiplexer 110 and the multiplexer 120 may also be implemented by other means such as program control of the configuration of the connection processor of the demultiplexer 110 and the multiplexer 120.
The demultiplexer 110 of the present invention is 1: m (M is an integer and M is greater than or equal to 2) demultiplexer 110, where the demultiplexer 110 has a signal input end and M signal output ends, where the demultiplexer 110 is configured to output a received signal from one or more of the M paths, a first output end 111 of the demultiplexer 110 is one of the M output ends, and a second output end 112 of the demultiplexer 110 is any other one of the M output ends except the first output end; the multiplexer 120 is K: 1(K is an integer and K is greater than or equal to 2), the multiplexer 120 has K signal input ends and a signal output end, the multiplexer 120 is configured to output one or more selected signals from the K signals received by the K signal input ends from the signal output end, the first input end 121 of the multiplexer 120 is one of the K input ends, and the second input end 122 of the multiplexer 120 is any other input end of the K input ends except the first input end.
In one embodiment, the demultiplexer 110 is configured to output the received signal from a selected one of the M paths.
In one embodiment, the multiplexer 120 is configured to output one selected from the K signals received by the K signal input terminals through the signal output terminal.
In one embodiment, the demultiplexer 110 is a 1:2 demultiplexer and the multiplexer 120 is a 2:1 multiplexer.
The distributor 130 of the present invention is a 1-to-N (N is an integer and N is greater than or equal to 2) distributor (1: N Splitter), the distributor 130 has a signal input end and N signal output ends, the distributor 130 is configured to duplicate a received signal into N signals and output the duplicated N signals through the N signal output ends, the first output end 132 of the distributor 130 is one of the N output ends, and the second output end 134 of the distributor 130 is any other output end of the N output ends except the first output end.
In one embodiment, the distributor 130 is a two-to-one distributor, the first output 132 of the distributor 130 is connected to the second input 122 of the multiplexer 120, and the second output 134 of the distributor 130 is connected to the second signal output interface 160.
When the distributor 130 stops working, the signal transmission channels connected to the distributor 130 are disconnected, for example, the signal transmission channels between the demultiplexer 110 and the distributor 130 are disconnected, and the signal transmission channels between the multiplexer 120 and the distributor 130 are disconnected. The reason why the distributor 130 stops working may be various, for example, the distributor 130 may be in a power-off state, or the distributor 130 may malfunction, etc. Accordingly, the selection of the signal transceiving channels of the multiplexer 120 and the demultiplexer 110 may be set according to practical situations.
In one embodiment, the demultiplexer 110 is configured to send the received signal to the second output 112 of the demultiplexer 110 when the distributor 130 is powered on, and to send the received signal to the first output 111 of the demultiplexer 110 when the distributor 130 is powered off; the multiplexer 120 is configured to receive the signal at the second input 122 of the multiplexer 120 when the distributor 130 is powered on and to receive the signal at the first input 121 of the multiplexer 120 when the distributor 130 is powered off.
In the technical solution of the above embodiment, the demultiplexer 110 and the multiplexer 120 are configured to select a transmission channel for receiving and transmitting signals according to whether the distributor 130 has power failure, when the distributor 130 is powered on, signals received by the apparatus are sent to the distributor 130 through the demultiplexer 110, the distributor 130 distributes the signals into multiple paths, and ensures that the multiple paths of the signals are looped out, when the distributor 130 has power failure, because the demultiplexer 110 and the multiplexer 120 both receive external power supply through the signal input interface 140, the signals received by the apparatus are sent to the multiplexer 120 through the demultiplexer 110 and then sent to the first signal output interface 150, it is ensured that at least one path of signals can be output and used when the distributor 130 has power failure, and signal looping out when the apparatus has power failure is realized. When only one signal is needed to be output, the device loaded by the distributor 130 is not needed to be started to receive one signal, and the power consumption of the device is effectively saved.
Taking the distributor 130 loaded in the video capture box device and the first signal output interface 150 externally connected to the video playing terminal as an example, if a user only wants to see the content of the video input signal, the user can see the content of the video at the video playing terminal without powering on the whole device, so that the power consumption of the video capture box is effectively saved; when the equipment is powered on, the video acquisition box processes the video input signal, and meanwhile, the user can see the content of the video at the video playing terminal.
In an embodiment, referring to fig. 2, fig. 2 is a schematic structural diagram of a signal looping-out apparatus according to an embodiment of the present invention, the power input terminal 113 of the demultiplexer 110 and the power input terminal 123 of the multiplexer 120 are respectively connected to an external power source, and the power input terminal 133 of the distributor 130 is connected to the device power source 170.
The device is a device equipped with the signal loop-out apparatus of the present invention, and may be, for example, a signal processor, a video capture box, a video encoding box, or the like. The device power supply 170 is a power supply connected to the device, and the external power supply is a power supply other than the device power supply 170.
According to the technical scheme of the embodiment, the demultiplexer 110 and the multiplexer 120 are connected to an external power supply different from the device power supply 170, and the external power supply is used for supplying power to the demultiplexer 110 and the multiplexer 120 separately, when the device is in a power-down state and the device power supply 170 cannot supply power, the demultiplexer 110 and the multiplexer 120 can still be kept in a power-up state under the power supply of the external power supply, and one path of signal transmission channel connected through the demultiplexer 110 and the multiplexer 120 is ensured to be in a connected state, so that signal loop-out of one path of signal connected through the demultiplexer 110 and the multiplexer 120 is realized when the device is powered down.
Specifically, the external power supply may have different implementations, and in one embodiment, the power input terminal 113 of the demultiplexer 110 and the power input terminal 123 of the multiplexer 120 are respectively connected to the power supply pin 141 of the signal input interface 140.
The signal input interface 140 is the signal input interface 140 of the device equipped with the signal loop-out apparatus according to the embodiment of the present invention, and the signal input interface 140 has a characteristic of being capable of introducing an external power source, for example, a power source of an external signal output terminal, into the interface, so as to have a power supply capability, for example, a transmitting end of the HDMI/DVI video interface may have a power supply capability of a 5V/500mA power source.
In the technical solution of the above embodiment, by using the characteristic that the signal input interface 140 has power supply capability, the power input terminals 123 of the demultiplexer 110 and the multiplexer 120 are respectively connected to the power supply pins 141 of the signal input interface 140, and an external power supply is introduced through the power supply pins 141 of the signal input interface 140 to supply power to the demultiplexer 110 and the multiplexer 120.
In addition to the power supply introduced through the signal input interface 140, the power supply to the demultiplexer 110 and the multiplexer 120 may be implemented by an external battery or other means. In another embodiment, the power input terminal 113 of the demultiplexer 110 and the power input terminal 123 of the multiplexer 120 are respectively connected to an external battery.
According to the technical scheme of the embodiment, the demultiplexer 110 and the multiplexer 120 are powered by the external storage battery, the power supply of the demultiplexer 110 and the power supply of the multiplexer 120 do not depend on external equipment, the universality is better, and the storage battery has the advantages of stable power supply and easiness in replacement.
The signals processed by the signal loop-out device can be various signals, such as video signals, audio signals and the like, and the corresponding signal input and output interfaces can be correspondingly arranged as different connecting devices. In one embodiment, the signal is an HDMI/DVI video signal, the signal input interface 140 is an HDMI/DVI connector, and the first signal output interface 150 is an HDMI/DVI connector.
In one embodiment, the signal input interface 140 is connected to the video signal output terminal 180 through a connection line; wherein the connection line connects a power supply of the video signal output terminal 180 to the signal input interface 140, and the signal input interface 140 supplies power to the connected demultiplexer 110 and multiplexer 120.
In the technical solution of the above embodiment, the power supply of the external video signal output terminal 180 is introduced through the signal input interface 140, so as to supply power to the demultiplexer 110 and the multiplexer 120.
The invention also provides a video capture box, which comprises the signal loop-out device as described in any one of the above embodiments, and a video processor, wherein the second output end 134 of the distributor 130 is connected with the video processor; the first signal output interface 150 is connected to a first video playing terminal, and the video processor is in communication connection with a second video playing terminal.
When the distributor 130 of the signal loop-out device works, the signal received by the device is sent to the distributor 130 through the demultiplexer 110, the distributor 130 distributes the signal into multiple paths, wherein one path of signal is sent to the video collection box to process the video input signal, and the other path of signal is sent to the first video playing terminal, so that the multiple paths of the signal loop-out are ensured, when the distributor 130 stops working, the signal received by the device is sent to the multiplexer 120 through the demultiplexer 110 and then sent to the first signal output interface 150, and the first video playing terminal can still play the video.
The invention also provides a video coding box, which comprises the signal looping-out device as described in any one of the above embodiments, and a video encoder, wherein the second output end 134 of the distributor 130 is connected with the video encoder; the first signal output interface 150 is connected to a first video playing terminal, and the video encoder is connected to a third video playing terminal in a communication manner.
When the distributor 130 of the signal loop-out device works, the signal received by the device is sent to the distributor 130 through the demultiplexer 110, the distributor 130 distributes the signal into multiple paths, wherein one path of signal is sent to the video coding box to process the video input signal, and the other path of signal is sent to the first video playing terminal, so that the multiple paths of the signal loop-out are ensured, when the distributor 130 stops working, the signal received by the device is sent to the multiplexer 120 through the demultiplexer 110 and then sent to the first signal output interface 150, and the first video playing terminal can still play the video.
The signal loop-out apparatus of the present invention is illustrated in an application example, the signal loop-out apparatus of the application example is installed in the video capture box 400, and the signal loop-out apparatus of the application example is illustrated by taking the demultiplexer 110 as a 1:2 demultiplexer, the multiplexer 120 as a 2:1 multiplexer, and the distributor 130 as a one-to-two distributor as an example.
Referring to fig. 4, the signal looping-out apparatus includes: a 1:2 demultiplexer 410, a 2:1 multiplexer 420, a one-to-two distributor 430, a first HDMI/DVI connector 440, and a second HDMI/DVI connector 450;
the first output terminal 411 of the 1:2 demultiplexer 410 is connected to the first input terminal 421 of the 2:1 multiplexer 420, the second output terminal 412 of the 1:2 demultiplexer 410 is connected to the input terminal 431 of the one-to-two distributor 430, the first output terminal 432 of the one-to-two distributor 430 is connected to the second input terminal 422 of the 2:1 multiplexer 420, the input terminal 414 of the 1:2 demultiplexer 410 is connected to the first HDMI/DVI connector 440, the output terminal 424 of the 2:1 multiplexer 420 is connected to the second HDMI/DVI connector 450, and the second HDMI/DVI connector 450 is connected to the display 480;
the power input end 413 of the 1:2 demultiplexer 410 and the power input end 423 of the 2:1 multiplexer 420 are respectively connected with the power supply pin 441 of the first HDMI/DVI connector 440, and the power input end 433 of the two-in-one distributor 430 is connected with the device power 470 of the video collection box 400;
wherein the 1:2 demultiplexer 410 is configured to send the received signal to the second output 412 of the 1:2 demultiplexer 410 when the video capture box 400 is powered on, and to send the received signal to the first output 411 of the 1:2 demultiplexer 410 when the video capture box 400 is powered off; the 2:1 multiplexer 420 is configured to receive a signal at the second input 422 of the 2:1 multiplexer 420 when the video capture box 400 is powered up and to receive a signal at the first input 421 of the 2:1 multiplexer 420 when the video capture box 400 is powered down.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a conventional signal loop-out device, where a 1-minute-N (N is an integer and N is greater than or equal to 2) distributor 310 is connected to an equipment power supply 320, and on the premise that the whole equipment loaded in the signal loop-out device is powered, the 1-minute-N (N is an integer and N is greater than or equal to 2) distributor 310 is used to duplicate a received signal into N signal paths for output, so as to implement signal loop-out. Taking one of the N channels of signals externally connected to the display as an example, when a user wants to see video content on the display, the user needs to turn on the whole device to see the video content on the display, and the power consumption of the device is large.
Compared with the conventional signal loop-out device shown in fig. 3, in the signal loop-out device according to the application example of the present invention, when the video capture box 400 is powered on, referring to the signal flow direction shown by the dotted line in fig. 4, the HDMI or DVI signal received by the signal loop-out device is sent to the 1:2 demultiplexer 410 through the first HDMI/DVI connector 440 to the one-to-two distributor 430, the HDMI or DVI signal is distributed into two paths by the one-to-two distributor 430, one path is sent to the 2:1 multiplexer 420 and then sent to the second HDMI/DVI connector 450, the other path is sent from the second output 434 of the one-to-two distributor 430, so as to ensure the loop-out of the HDMI or DVI signal, wherein the HDMI or DVI signal output from the second output 434 of the one-to-two distributor 430 can be used for a plurality of different purposes, such as being externally connected to other video play terminals, or being connected to the video processor 460 to perform, such as encoding, scaling, splicing, and/or segmenting the video, and outputting the video.
When the video capture box 400 is powered down, referring to the signal flow direction shown by the dotted line in fig. 4, because the 1:2 demultiplexer 410 and the 2:1 multiplexer 420 both receive power through the power supply pin 441 of the first HDMI/DVI connector 440, and the existing HDMI/DVI protocol specifies that a power supply needs to be provided at the interface of the HDMI/DVI signal output device, when a signal is connected to the first HDMI/DVI connector 440, the 1:2 demultiplexer 410 and the 2:1 multiplexer 420 are in a powered-up state, the signal received by the device is sent to the 1:2 demultiplexer 410 through the first HDMI/DVI connector 440, sent to the 2:1 multiplexer 420, and then sent to the second HDMI/DVI connector 450 to the display 480, so that at least one signal can be output when the video capture box 400 is powered down, and the signal loop-out of the video capture box 400 is realized when the power is powered down. Thus, when the user only wants to see the video content on the display 480, the user can see the video content on the display 480 without powering on the video capture box 400, which effectively saves the power consumption of the video capture box 400.
In the description herein, references to the description of the term "one embodiment," "an application example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or application example is included in at least one embodiment or application example of the invention. In this specification, a schematic representation of the above terms does not necessarily refer to the same embodiment or application example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or applications.
The technical features of the above embodiments and/or application examples can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments and/or application examples are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations should be considered as the scope of the description in the present specification.
The above-mentioned embodiments and/or application examples only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A signal looping-out apparatus, comprising: a demultiplexer (110), a multiplexer (120) and a distributor (130);
the first output end (111) of the demultiplexer (110) is connected with the first input end (121) of the multiplexer (120), the second output end (112) of the demultiplexer (110) is connected with the input end (131) of the distributor (130), and the first output end (132) of the distributor (130) is connected with the second input end (122) of the multiplexer (120);
wherein the demultiplexer (110) is configured to send the received signal to the second output (112) of the demultiplexer (110) when the signal transmission channel between the demultiplexer (110) and the distributor (130) is connected, and to send the received signal to the first output (111) of the demultiplexer (110) when the signal transmission channel between the demultiplexer (110) and the distributor (130) is disconnected; the multiplexer (120) is configured to receive the signal of the second input (122) of the multiplexer (120) when the signal transmission channel between the multiplexer (120) and the distributor (130) is connected, and to receive the signal of the first input (121) of the multiplexer (120) when the signal transmission channel between the multiplexer (120) and the distributor (130) is disconnected;
the demultiplexer (110) is configured to send the received signal to the second output (112) of the demultiplexer (110) when the distributor (130) is powered up, and to send the received signal to the first output (111) of the demultiplexer (110) when the distributor (130) is powered down; the multiplexer (120) is configured to receive the signal at the second input (122) of the multiplexer (120) when the divider (130) is powered up and to receive the signal at the first input (121) of the multiplexer (120) when the divider (130) is powered down.
2. The signal looping-out device according to claim 1, characterized in that the power input terminal (113) of the demultiplexer (110) and the power input terminal (123) of the multiplexer (120) are connected to an external power supply, respectively, and the power input terminal (133) of the distributor (130) is connected to the device power supply (170).
3. The signal looping-out device according to claim 2, characterized in that the power input terminal (113) of the demultiplexer (110) and the power input terminal (123) of the multiplexer (120) are respectively connected to the power supply pin (141) of the signal input interface (140), or the power input terminal (113) of the demultiplexer (110) and the power input terminal (123) of the multiplexer (120) are respectively connected to an external battery.
4. The signal looping-out device according to claim 1, characterized in that the input (114) of the demultiplexer (110) is connected to a signal input interface (140), the output (124) of the multiplexer (120) is connected to a first signal output interface (150), the signal is an HDMI/DVI video signal, the signal input interface (140) is an HDMI/DVI connector, and the first signal output interface (150) is an HDMI/DVI connector.
5. The signal looping-out device according to claim 4, characterized in that, said signal input interface (140) is connected with a video signal output terminal (180) through a connection line;
wherein the connection line connects a power supply of the video signal output terminal (180) to the signal input interface (140), and the signal input interface (140) supplies power to the connected demultiplexer (110) and multiplexer (120).
6. The signal looping-out device according to any one of claims 1 to 5, characterized in that the divider (130) is a one-to-two divider, the first output (132) of the divider (130) is connected to the second input (122) of the multiplexer (120), and the second output (134) of the divider (130) is connected to the second signal output interface (160).
7. The signal looping-out device according to any of claims 1 to 5, characterized in that said demultiplexer (110) is a 1:2 demultiplexer and said multiplexer (120) is a 2:1 multiplexer.
8. A video capture box comprising the signal looping-out apparatus of claim 4, and a video processor, the second output (134) of the distributor (130) being connected to the video processor;
the first signal output interface (150) is connected with a first video playing terminal, and the video processor is in communication connection with a second video playing terminal.
9. A video encoding box, comprising a signal looping-out device according to claim 4, and a video encoder, to which the second output (134) of the distributor (130) is connected;
the first signal output interface (150) is connected with a first video playing terminal, and the video encoder is in communication connection with a third video playing terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711394407.7A CN108055482B (en) | 2017-12-21 | 2017-12-21 | Signal loop-out device, video acquisition box and video coding box |
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| CN201711394407.7A CN108055482B (en) | 2017-12-21 | 2017-12-21 | Signal loop-out device, video acquisition box and video coding box |
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| CN108055482A CN108055482A (en) | 2018-05-18 |
| CN108055482B true CN108055482B (en) | 2020-02-28 |
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| CN102761710A (en) * | 2011-04-29 | 2012-10-31 | 北京真视通科技股份有限公司 | Audio/video intelligent switcher |
| DE112014005296B4 (en) * | 2013-11-20 | 2018-10-25 | Mitsubishi Electric Corporation | Radio communication system, transmitting device, receiving device and communication terminal |
| CN205901910U (en) * | 2016-06-27 | 2017-01-18 | 广州格芬电子科技有限公司 | HDMI information source demultiplexer |
| CN206611502U (en) * | 2016-12-22 | 2017-11-03 | 深圳市艾森魏尔科技有限公司 | A kind of extremely clear 4K60HZ demultplexers of HDMI |
| CN206686289U (en) * | 2017-05-10 | 2017-11-28 | 上海东方传媒技术有限公司 | A kind of sdi signal switches equipment |
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