CN110830754A - Heterogeneous video conference device based on network - Google Patents
Heterogeneous video conference device based on network Download PDFInfo
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- CN110830754A CN110830754A CN201911206384.1A CN201911206384A CN110830754A CN 110830754 A CN110830754 A CN 110830754A CN 201911206384 A CN201911206384 A CN 201911206384A CN 110830754 A CN110830754 A CN 110830754A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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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
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
Abstract
The invention belongs to the field of computer system design, and discloses a network-based heterogeneous video conference device, which comprises a main board and a plurality of auxiliary boards, wherein a first control circuit of the main board generates a first network communication signal according to a first communication signal received from a wired communication link; the exchange circuit of the mainboard generates a plurality of second network communication signals according to the first network communication signals; the second control circuit of the subplate generates a video signal according to the second network communication signal; the display component of the sub-board displays according to the video signal. Because the switching circuit in the mainboard generates a plurality of second network communication signals according to the first network communication signals, when more video paths need to be added for support, the expansion capability of the heterogeneous network-based video conference device is improved.
Description
Technical Field
The invention belongs to the field of computer system design, and particularly relates to a heterogeneous video conference device based on a network.
Background
With the development of video services, the number of video channels supported by a video terminal is higher and higher, and a single video terminal needs to support high performance requirements such as multi-channel 4k video coding and multi-channel 4k decoding. In order to meet the requirement of multiple paths of videos, a terminal of a single system cannot meet the requirement, a heterogeneous system is required to be used, and the digital signal processing is increased to enhance the video processing capacity. At present, a common heterogeneous terminal is composed of 2 different systems, and the heterogeneous terminals are connected and communicated with each other in a PCIE (peripheral component interface express) and other bus modes, the heterogeneous terminal in the mode increases software development complexity, if more video path number supports need to be added, a digital signal processing system needs to be added, and the heterogeneous terminal is not easy to expand in a PCIE mode.
Disclosure of Invention
The invention provides a network-based heterogeneous video conference device, and aims to solve the problem that the traditional network-based heterogeneous video conference device is connected and communicated in a PCIE (peripheral component interface express) or other bus mode, and when more video paths are required to be added for supporting, a second control circuit (a digital signal processing system) is required to be added, so that the device is not easy to expand in a PCIE or other bus mode.
The invention is realized in such a way that a heterogeneous network-based video conference device comprises a main board and a plurality of auxiliary boards connected with the main board;
the main board includes:
a first control circuit configured to generate a first network communication signal from a first communication signal received from a wired communication link;
a switching circuit coupled to the serial signal conversion circuit and configured to generate a plurality of second network communication signals from the first network communication signals;
the sub-plate includes:
a second control circuit connected to the switch circuit and configured to generate a video signal according to the second network communication signal;
and the display component is connected with the second control circuit and is configured to display according to the video signal.
In one embodiment, the main board further includes:
a serial signal conversion circuit connected to the first control circuit and configured to convert the first serial signal into a first network communication signal;
the first control circuit is specifically configured to generate a first serial signal from a first communication signal received from a wired communication link.
In one embodiment, the serial signal conversion circuit comprises a USB to ethernet signal chip;
the USB-to-Ethernet signal chip comprises a first serial signal input end and a first network communication signal output end;
the first serial signal input end comprises a USB data positive input end of the USB-to-Ethernet signal chip and a USB data negative input end of the USB-to-Ethernet signal chip;
the first network communication signal output end comprises a first channel positive input-output end of the USB-to-Ethernet signal chip, a first channel negative input-output end of the USB-to-Ethernet signal chip, a second channel positive input-output end of the USB-to-Ethernet signal chip, a second channel negative input-output end of the USB-to-Ethernet signal chip, a third channel positive input-output end of the USB-to-Ethernet signal chip, a third channel negative input-output end of the USB-to-Ethernet signal chip, a fourth channel positive input-output end of the USB-to-Ethernet signal chip and a fourth channel negative input-output end of the USB-to-Ethernet signal chip.
In one embodiment, the sub-plate further comprises:
a video input component connected with the second control circuit and configured to forward local video signals;
the second control circuit is further configured to generate a third network communication signal from the local video signal;
the switch circuit is further configured to generate a fourth network communication signal from a plurality of the third network communication signals;
the first control circuit is further configured to generate a second communication signal from the fourth network communication signal and transmit the second communication signal over a wired communication link.
In one embodiment, the main board further includes:
a wireless communication circuit configured to generate a first wired communication signal from a first wireless communication signal received by the wireless communication link, and to generate a second wireless communication signal from a second wired communication signal and to transmit the second wireless communication signal from the wireless communication link;
the first control circuit is further configured to generate the first serial signal from the first wired communication signal and to generate the second wired communication signal from the second serial signal.
In one embodiment, the main board further includes:
a network communication signal conversion circuit connected to the second control circuit and configured to generate the seventh network communication signal according to a fifth network communication signal and generate a sixth network communication signal according to an eighth network communication signal;
the switch circuit is specifically configured to generate a plurality of the second network communication signals and a plurality of the fifth network communication signals from the first network communication signals and to generate the fourth network communication signals from a plurality of the third network communication signals and a plurality of the sixth network communication signals;
the second control circuit is specifically configured to generate the video signal from the seventh network communication signal and to generate the eighth network communication signal from the local video signal.
In one embodiment, the network communication signal conversion circuit comprises an ethernet transceiver;
the Ethernet transceiver comprises a plurality of groups of fifth network communication signal input ends, a plurality of groups of sixth network communication signal output ends, a plurality of groups of seventh network communication signal output ends and a plurality of groups of eighth network communication signal input ends;
wherein the set of fifth network communication signal inputs comprises a pair of differential signal inputs of the Ethernet transceiver;
a set of said sixth network communication signal outputs comprises a pair of differential signal outputs of said ethernet transceiver;
a set of said seventh network communication signal outputs and a set of said eighth network communication signal inputs together comprise a media independent interface of a channel of said ethernet transceiver.
In one embodiment, the video input component comprises an HDMI interface circuit, an SDI interface circuit, a VGA interface circuit, and a USB interface circuit.
In one embodiment, the main board further includes:
the trigger component is connected with the first control circuit and used for generating a trigger signal;
the first control circuit is further configured to generate the first network communication signal according to the trigger signal;
the second control circuit is further configured to generate the video signal from the local video signal and the second network communication signal.
In one embodiment, the sub-plate further comprises:
the serial communication circuit is connected with the second control circuit and is configured to convert the asynchronous communication signal into a pan-tilt control signal;
the second control circuit is further configured to generate the asynchronous communication signal from the second network communication signal.
In one embodiment, the main board further includes:
the audio interface circuit is connected with the first control circuit and is configured to transfer an original audio signal;
the audio output circuit is connected with the first control circuit and configured to play according to a target audio signal;
the first control circuit is further configured to generate the target audio signal from the original audio signal.
In one embodiment, the switch circuit comprises an ethernet switch chip;
the Ethernet switching chip comprises a group of first network communication signal input ends, a plurality of groups of second network communication signal output ends, a plurality of groups of fifth network communication signal output ends and a plurality of groups of sixth network communication signal input ends;
wherein a group of the first network communication signal input ends comprises a media independent interface of a channel of the Ethernet switching chip;
a group of the second network communication signal output ends comprise a media independent interface of one channel of the Ethernet switching chip;
the group of fifth network communication signal output ends comprises a pair of differential signal output ends of an Ethernet switching chip;
a set of the sixth network communication signal inputs includes a pair of differential signal inputs of an ethernet switch chip.
In one embodiment, the first control circuit comprises a first microprocessor;
and the USB data positive output end of the first microprocessor and the USB data negative output end of the first microprocessor jointly form a first serial signal output end of the first control circuit.
In one embodiment, the second control circuit comprises a digital signal processing chip;
the first channel positive input-output end of the digital signal processing chip, the first channel negative input-output end of the digital signal processing chip, the second channel positive input-output end of the digital signal processing chip, the second channel negative input-output end of the digital signal processing chip, the third channel positive input-output end of the digital signal processing chip, the third channel negative input-output end of the digital signal processing chip, the fourth channel positive input-output end of the digital signal processing chip and the fourth channel negative input-output end of the digital signal processing chip jointly form a second network communication signal input end of the second control circuit.
The embodiment of the invention comprises a main board and a plurality of auxiliary boards, wherein a first control circuit of the main board generates a first network communication signal according to a first communication signal received from a wired communication link; the exchange circuit of the mainboard generates a plurality of second network communication signals according to the first network communication signals; the second control circuit of the subplate generates a video signal according to the second network communication signal; the display component of the sub-board displays according to the video signal. Because the switching circuit in the mainboard generates a plurality of second network communication signals according to the first network communication signals, when more video paths need to be added for support, the expansion capability of the heterogeneous network-based video conference device is improved.
Drawings
In order to more clearly illustrate the technical invention in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 2 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 3 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 4 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 5 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 6 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 7 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 8 is another block diagram of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 9 is a circuit diagram illustrating an exemplary first control circuit, a serial signal conversion circuit, and a switching circuit of a network-based heterogeneous video conference apparatus according to an embodiment of the present invention;
fig. 10 is a circuit diagram illustrating an exemplary switching circuit, a network communication signal conversion circuit, and a second control circuit of the network-based heterogeneous video conference device according to the embodiment of the present invention;
fig. 11 is a circuit diagram of an exemplary switching circuit and a second control circuit of a network-based heterogeneous video conference 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, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 illustrates a module structure of a heterogeneous network-based video conference device according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are illustrated, and the details are as follows:
the heterogeneous network-based video conference device comprises a main board and a plurality of auxiliary boards connected with the main board.
The main board includes a first control circuit 01, a serial signal conversion circuit 02, and a switching circuit 03.
The first control circuit 01 is configured to generate a first network communication signal from a first communication signal received from the wired communication link; the switch circuit 03 is connected to the serial signal conversion circuit 02 and configured to generate a plurality of second network communication signals from the first network communication signals.
Wherein the sub-board comprises a second control circuit 04 and a display assembly 05.
The second control circuit 04 is connected to the switching circuit 03 and configured to generate a video signal according to the second network communication signal; the display module 05 is connected to the second control circuit 04 and configured to perform display according to a video signal.
In a specific implementation, the upper computer sends a first communication signal. The second control circuit 04 may include a DSP chip.
As shown in fig. 2, the sub-panel also includes a video input assembly 06.
The video input component 06 is connected with the second control circuit 04 and configured to forward the local video signal; the second control circuit 04 is further configured to generate a third network communication signal from the local video signal; the switch circuit 03 is further configured to generate a fourth network communication signal from the plurality of third network communication signals; the first control circuit 01 is further configured to generate a second communication signal from the fourth network communication signal and transmit the second communication signal over the wired communication link.
In specific implementation, the second communication signal may be sent to the upper computer.
By configuring the video input component 06 to forward the local video signal, the local video monitoring of the upper computer is realized.
As shown in fig. 3, the main board further includes a wireless communication circuit 07.
The wireless communication circuit 07 is configured to generate a first wired communication signal from a first wireless communication signal received by the wireless communication link, and to generate a second wireless communication signal from a second wired communication signal and to transmit the second wireless communication signal from the wireless communication link; the first control circuit 01 is further configured to generate a first serial signal from the first wired communication signal and a second wired communication signal from the second serial signal.
By configuring the wireless communication circuit 07, the communication between the upper computer and the heterogeneous video conference device based on the network can be realized through a wireless communication link, and the flexibility of data transmission is improved.
As shown in fig. 4, the motherboard further includes a network communication signal conversion circuit 08.
The network communication signal conversion circuit 08 is connected to the second control circuit 04, and configured to generate a seventh network communication signal according to the fifth network communication signal and generate a sixth network communication signal according to the eighth network communication signal; the switch circuit 03 is specifically configured to generate a plurality of second network communication signals and a plurality of fifth network communication signals from the first network communication signal, and to generate a fourth network communication signal from a plurality of third network communication signals and a plurality of sixth network communication signals; the second control circuit 04 is specifically configured to generate a video signal from the seventh network communication signal and to generate an eighth network communication signal from the local video signal.
The plurality of sub-boards can be expanded again through the network communication signal conversion circuit 08, the number of video paths is increased, and the data processing capacity of the heterogeneous video conference device based on the network is improved.
The video input module 06 includes an HDMI interface circuit, an SDI interface circuit, a VGA interface circuit, and a USB interface circuit.
As shown in fig. 5, the main board further includes a trigger assembly 09.
The trigger component 09 is connected with the first control circuit 01 and used for generating a trigger signal; the first control circuit 01 is further configured to generate a first network communication signal according to the trigger signal; the second control circuit 04 is further configured to generate a video signal from the local video signal and the second network communication signal.
The trigger component 09 generates a trigger signal, the trigger signal carries trigger information, and the second control circuit 04 generates a video signal according to the local video signal and a second network communication signal carrying the trigger information, so that local monitoring video is played locally.
As shown in fig. 6, the sub-board further includes a serial communication circuit 10.
The serial communication circuit 10 is connected to the second control circuit 04, and is configured to convert the asynchronous communication signal into a pan/tilt control signal; the second control circuit 04 is further configured to generate an asynchronous communication signal from the second network communication signal.
The trigger component 09 generates a trigger signal, the trigger signal carries trigger information, the second control circuit 04 generates an asynchronous communication signal according to a second network communication signal carrying the trigger information, and the serial communication circuit 10 converts the asynchronous communication signal into a pan-tilt control signal, so that the pan-tilt matched with the video input component 06 is controlled.
As shown in fig. 7, the main board further includes an audio interface circuit 11 and an audio output circuit 12.
The audio interface circuit 11 is connected with the first control circuit 01 and configured to transfer an original audio signal; the audio output circuit 12 is connected to the first control circuit 01, and configured to play according to a target audio signal; the first control circuit 01 is further configured to generate a target audio signal from the original audio signal.
As shown in fig. 8, the main board further includes a serial signal conversion circuit 02.
The serial signal conversion circuit 02 is connected to the first control circuit 01, and is configured to convert the first serial signal into a first network communication signal; the first control circuit 01 is specifically configured to generate a first serial signal from a first communication signal received from the wired communication link.
Fig. 9 shows exemplary circuit structures of the first control circuit 01, the serial signal conversion circuit 02 and the switch circuit 03 of the network-based heterogeneous video conference device according to the embodiment of the present invention, fig. 10 shows exemplary circuit structures of the switch circuit 03, the network communication signal conversion circuit 08 and the second control circuit 04 of the network-based heterogeneous video conference device according to the embodiment of the present invention, fig. 11 shows exemplary circuit structures of the switch circuit 03 and the second control circuit 04 of the network-based heterogeneous video conference device according to the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and details are as follows:
fig. 9, 10, and 11 each include a part of an exemplary circuit configuration diagram of the switch circuit 03.
The network communication signal conversion circuit 08 includes an ethernet transceiver U1.
The ethernet transceiver U1 includes sets of fifth network communication signal inputs, sets of sixth network communication signal outputs, sets of seventh network communication signal outputs, and sets of eighth network communication signal inputs.
Wherein the set of fifth network communication signal inputs comprises a pair of differential signal inputs of the ethernet transceiver U1.
The set of sixth network communication signal outputs comprises a pair of differential signal outputs of the ethernet transceiver U1.
The set of seventh network communication signal outputs and the set of eighth network communication signal inputs collectively comprise a media independent interface of one channel of the ethernet transceiver U1.
The pair of differential signal inputs of the ethernet transceiver U1 includes the SGMII data transmit positive terminal P1_ S _ IN _ P of the ethernet transceiver U1 and the SGMII data transmit negative terminal P1_ S _ IN _ N of the ethernet transceiver U1.
The pair of differential signal outputs of the ethernet transceiver U1 includes the SGMII data receiving positive terminal P1_ S _ OUT _ P of the ethernet transceiver U1 and the SGMII data receiving negative terminal P1_ S _ OUT _ N of the ethernet transceiver U1.
The media independent interface of one channel of the Ethernet transceiver U1 includes a first media independent positive terminal P0_ MDI _0_ P of the Ethernet transceiver U1, a first media independent negative terminal P0_ MDI _0_ N of the Ethernet transceiver U1, a second media independent positive terminal P0_ MDI _1_ P of the Ethernet transceiver U1, a second media independent negative terminal P0_ MDI _1_ N of the Ethernet transceiver U1, the third media independent positive terminal P0_ MDI _2_ P of the ethernet transceiver U1, the third media independent negative terminal P0_ MDI _2_ N of the ethernet transceiver U1, the fourth media independent positive terminal P0_ MDI _3_ P of the ethernet transceiver U1, and the fourth media independent negative terminal P0_ MDI _3_ N of the ethernet transceiver U1 together form an eighth network communication signal input terminal of the network communication signal conversion circuit 08 and a seventh network communication signal output terminal of the network communication signal conversion circuit 08.
The switch circuit 03 includes an ethernet switch chip U2.
The ethernet switch chip U2 includes a set of first network communication signal inputs and a plurality of sets of second network communication signal outputs, a plurality of sets of fifth network communication signal outputs, and a plurality of sets of sixth network communication signal inputs.
Wherein, a group of first network communication signal input ends comprise a media independent interface of one channel of the Ethernet switching chip U2;
a group of first network communication signal output ends comprise a media independent interface of one channel of the Ethernet switching chip U2; the media independent interface of one channel of the Ethernet switch chip U2 includes a first channel first media independent positive terminal P0_ MDIP [0] of the Ethernet switch chip U2, a first channel first media independent negative terminal P0_ MDIN [0] of the Ethernet switch chip U2, a first channel second media independent positive terminal P0_ MDIP [1] of the Ethernet switch chip U2, a first channel first media independent negative terminal P0_ MDIN [1] of the Ethernet switch chip U2, a first channel third media independent positive terminal P0_ MDIP [2] of the Ethernet switch chip U2, a first channel third media independent negative terminal P0_ MDIN [2] of the Ethernet switch chip U2, a first channel fourth media independent positive terminal P0_ MDIP [3] of the Ethernet switch chip U2, and a first channel fourth media independent positive terminal P0_ MDIN [3] of the Ethernet switch chip U2.
Wherein, a group of second network communication signal input ends comprise a media independent interface of one channel of the Ethernet switching chip U2;
the media independent interface of one channel of the ethernet switch chip U2 includes a second channel first media independent positive terminal P1_ MDIP [0] of the ethernet switch chip U2, a second channel first media independent negative terminal P1_ MDIN [0] of the ethernet switch chip U2, a second channel second media independent positive terminal P1_ MDIP [1] of the ethernet switch chip U2, a second channel first media independent negative terminal P1_ MDIN [1] of the ethernet switch chip U2, a second channel third media independent positive terminal P1_ MDIP [2] of the ethernet switch chip U2, a second channel third media independent negative terminal P1_ MDIN [2] of the ethernet switch chip U2, a second channel fourth media independent positive terminal P1_ MDIP [3] of the ethernet switch chip U2, and a second channel fourth media independent positive terminal P1_ MDIN [ 38 ] of the ethernet switch chip U2.
The group of fifth network communication signal output ends comprises a pair of differential signal output ends of the Ethernet switching chip U2; the pair of differential signal output ends of the ethernet switching chip U2 includes a data transmitting positive terminal P4_ TXN of the ethernet switching chip U2 and a data transmitting negative terminal P4_ TXP of the ethernet switching chip U2.
The set of sixth network communication signal inputs includes a pair of differential signal inputs of the ethernet switch chip U2. The pair of differential signal input terminals of the ethernet switching chip U2 includes a data receiving positive terminal P4_ RXN of the ethernet switching chip U2 and a data receiving negative terminal P4_ RXP of the ethernet switching chip U2.
The Ethernet switch chip U2 comprises a group of first network communication signal input ends and a group of fourth network communication signal output ends, wherein the group of first network communication signal input ends is the Ethernet switch chip U2; the multiple groups of second network communication signal output ends of the Ethernet switching chip U2 are multiple groups of third network communication signal input ends of the Ethernet switching chip U2.
The serial signal conversion circuit 02 includes a USB to ethernet signal chip U3.
USB to ethernet signal chip U3 includes a first serial signal input and a first network communication signal output.
The first serial signal input terminal includes a USB data positive input terminal USB _ DP of the USB to ethernet signal chip U3 and a USB data negative input terminal USB _ DM of the USB to ethernet signal chip U3.
The first network communication signal output end comprises a first channel positive electrode input-output end TR0P of a USB-to-ethernet signal chip U3, a first channel negative electrode input-output end TR0N of a USB-to-ethernet signal chip U3, a second channel positive electrode input-output end TR1P of a USB-to-ethernet signal chip U3, a second channel negative electrode input-output end TR1N of a USB-to-ethernet signal chip U3, a third channel positive electrode input-output end TR2P of a USB-to-ethernet signal chip U3, a third channel negative electrode input-output end TR2N of a USB-to-ethernet signal chip U3, a fourth channel positive electrode input-output end TR3P of a USB-to-ethernet signal chip U3, and a fourth channel negative electrode input-output end TR3N of a USB-to-ethernet signal chip U3.
The first control circuit 01 includes a first microprocessor U4.
The USB data positive output terminal USB2_ HOST0_ DP of the first microprocessor U4 and the USB data negative output terminal USB2_ HOST0_ DN of the first microprocessor U4 together form a first serial signal output terminal of the first control circuit 01.
The second control circuit 04 includes a digital signal processing chip U5.
A first channel positive electrode input-output end ENET0_ TRDI [0] P of the digital signal processing chip U5, a first channel negative electrode input-output end ENET0_ TRDI [0] N of the digital signal processing chip U5, a second channel positive electrode input-output end ENET0_ TRDI [1] P of the digital signal processing chip U5, a second channel negative electrode input-output end ENET0_ TRDI [1] N of the digital signal processing chip U5, a third channel positive electrode input-output end ENET0_ TRDI [2] P of the digital signal processing chip U5, a third channel negative electrode input-output end ENET0_ TRDI [2] N of the digital signal processing chip U5, a fourth channel positive electrode input-output end ENET0_ TRDI [3] P of the digital signal processing chip U5 and a fourth channel negative electrode input-output end ENET0_ TRDI [3] N of the digital signal processing chip U5 jointly form a second network communication signal input end of the second control circuit 04.
The following further description of fig. 9, 10 and 11 is made in conjunction with the working principle:
the first microprocessor U4 of the motherboard generates a first serial signal according to a first communication signal received from the wired communication link and transmits from the USB data positive output terminal USB2_ HOST0_ DP of the first microprocessor U4 and the USB data negative output terminal USB2_ HOST0_ DN of the first microprocessor U4 to the USB data positive input terminal USB _ DP of the USB to ethernet signal chip U3 and the USB data negative input terminal USB _ DM of the USB to ethernet signal chip U3; the USB to ethernet signal chip U3 of the motherboard converts the first serial signal into a first network communication signal and sends the first serial signal from the first channel positive input/output terminal TR0P of the USB to ethernet signal chip U3 to the fourth channel positive input/output terminal TR3P of the USB to ethernet signal chip U3, the first channel negative input/output terminal TR0N of the USB to ethernet signal chip U3 to the fourth channel negative input/output terminal TR3N of the USB to ethernet signal chip U3 to the first channel first media independent positive terminal P0_ MDIP [0] of the ethernet switch chip U2 to the first channel fourth media independent positive terminal P0_ MDIP [3] of the ethernet switch chip U2, the first channel first media independent negative terminal P0_ MDIN [0] of the ethernet switch chip U2 to the first channel fourth media independent negative terminal P0_ MDIN [3] of the ethernet switch chip U2; the ethernet switch chip U2 of the motherboard generates a plurality of second network communication signals and a plurality of fifth network communication signals from the first network communication signals. The second network communication signals are transmitted from the media independent interface of one channel of the Ethernet switch chip U2 (e.g., the first positive channel first media independent terminal P1_ MDIP [0] of the Ethernet switch chip U2 to the fourth positive channel fourth media independent terminal P1_ MDIP [3] of the Ethernet switch chip U2, the second channel first media independent negative terminal P1_ MDIN [0] of the Ethernet switch chip U2 to the fourth channel fourth media independent negative terminal P1_ MDIN [3] of the Ethernet switch chip U2) to the first channel positive input/output terminal ENET0_ MDDI [0] P of the digital signal processing chip U5 of the plurality of sub-boards to the fourth channel positive input/output terminal ENET0_ TRDI [3] P of the digital signal processing chip U5, the first channel negative input/output terminal ENET0_ TRDI [0] N of the digital signal processing chip U5 to the fourth channel negative input/output terminal TRET 353 _ TRDI [0] N of the digital signal processing chip U35 5, the digital signal processing chip U5 of the sub board converts the second network communication signal into a video signal. Meanwhile, a plurality of fifth network communication signals are transmitted from a plurality of pairs of differential signal output ends of the Ethernet switch chip U2 (such as the positive data transmission end P4_ TXN of the Ethernet switch chip U2 and the negative data transmission end P4_ TXP of the Ethernet switch chip U2) to a plurality of pairs of differential signal input ends of the Ethernet transceiver U1 (such as the positive SGMII data transmission end P1_ S _ IN _ P of the Ethernet transceiver U1 and the negative SGMII data transmission end P1_ S _ IN _ N of the Ethernet transceiver U1), the Ethernet transceiver U1 generates a seventh network communication signal according to the fifth network communication signal, and the seventh network communication signal is transmitted from the media independent interface of one channel (the positive first media independent end P0_ MDI _0_ P of the Ethernet transceiver U1 to the negative media independent end P632 _ MDI _3_ P of the fourth media independent end P1 of the Ethernet transceiver U638 to the fourth media independent end P2 _ MDI _ N1 of the Ethernet transceiver U638 MDI _3_ N) to the first channel positive input/output terminal eneet 0_ TRDI [0] P of the digital signal processing chip U5 of the plurality of sub-boards to the fourth channel positive input/output terminal eneet 0_ TRDI [3] P of the digital signal processing chip U5, the first channel negative input/output terminal eneet 0_ TRDI [0] N of the digital signal processing chip U5 to the fourth channel negative input/output terminal eneet 0_ TRDI [3] N of the digital signal processing chip U5, and the digital signal processing chip U5 of the sub-board converts the second network communication signal into a video signal.
The video input component 06 of the subplate forwards the local video signal, and the digital signal processing chip U2 of the subplate generates a third network communication signal according to the local video signal; the DSP chip U2 of the plurality of slave boards sends the third network communication signal from the first channel positive input/output terminal ENET0_ TRDI [0] P of the DSP chip U5 to the fourth channel positive input/output terminal ENET0_ TRDI [3] P of the DSP chip U5, the first channel negative input/output terminal ENET 84 _ TRDI [0] N of the DSP chip U5 to the fourth channel negative input/output terminal ENET0_ TRDI [3] N of the DSP chip U5 to the media independent interface of one channel of the Ethernet switch chip U2 (e.g., the second channel first media independent positive terminal P1_ MDIP [0] of the Ethernet switch chip U2 to the second channel second media independent positive terminal P38 _ MDIP [3] of the Ethernet switch chip U2, the second channel first media independent terminal P1_ MDIP [0] of the Ethernet switch chip U2 to the second channel second media independent positive terminal P1_ MDP [3] of the Ethernet switch chip U2, the Ethernet switch chip U6329, the second channel MDP 2_ MDP 3, the ethernet switching chip U2 generates a fourth network communication signal according to the plurality of third network communication signals and transmits the fourth network communication signal from the first channel first media independent positive terminal P0_ MDIP [0] of the ethernet switching chip U2 to the first channel fourth media independent positive terminal P0_ MDIP [3] of the ethernet switching chip U2, the first channel first media independent negative terminal P0_ MDIN [0] of the ethernet switching chip U2 to the first channel fourth media independent negative terminal P0_ MDIN [3] of the ethernet switching chip U2 to the first channel positive input/output terminal TR0P of the USB to ethernet signal chip U3 to the fourth channel positive input/output terminal TR3 TR 38 of the USB to ethernet signal chip U3, the first channel negative input/output terminal TR0 TR N of the USB to USB signal output terminal TR3 of the USB to USB signal chip U3 to the fourth channel negative input/output terminal TR3 of the USB to USB signal chip U3, the USB-to-Ethernet signal chip U3 generates a second serial signal according to the fourth network communication signal and transmits the second serial signal to the first microprocessor U1 from a USB data positive input terminal USB _ DP of the USB-to-Ethernet signal chip U3 and a USB data negative input terminal USB _ DM of the USB-to-Ethernet signal chip U3; the first microprocessor U1 generates a second communication signal based on the second serial signal and transmits the second communication signal over the wired communication link.
The embodiment of the invention comprises a main board and a plurality of auxiliary boards, wherein a first control circuit of the main board generates a first network communication signal according to a first communication signal received from a wired communication link; the exchange circuit of the mainboard generates a plurality of second network communication signals according to the first network communication signals; the second control circuit of the subplate generates a video signal according to the second network communication signal; the display component of the sub-board displays according to the video signal. Because the switching circuit in the mainboard generates a plurality of second network communication signals according to the first network communication signals, when more video paths need to be added for support, the expansion capability of the heterogeneous network-based video conference device is improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A heterogeneous network-based video conference device is characterized in that the heterogeneous network-based video conference device comprises a main board and a plurality of auxiliary boards connected with the main board;
the main board includes:
a first control circuit configured to generate a first network communication signal from a first communication signal received from a wired communication link;
a switching circuit coupled to the serial signal conversion circuit and configured to generate a plurality of second network communication signals from the first network communication signals;
the sub-plate includes:
a second control circuit connected to the switch circuit and configured to generate a video signal according to the second network communication signal;
and the display component is connected with the second control circuit and is configured to display according to the video signal.
2. The network-based heterogeneous video conferencing device of claim 1, wherein the motherboard further comprises:
a serial signal conversion circuit connected to the first control circuit and configured to convert the first serial signal into a first network communication signal;
the first control circuit is specifically configured to generate a first serial signal from a first communication signal received from a wired communication link.
3. The network-based heterogeneous video conferencing device of claim 2, wherein the serial signal conversion circuit comprises a USB to ethernet signal chip;
the USB-to-Ethernet signal chip comprises a first serial signal input end and a first network communication signal output end;
the first serial signal input end comprises a USB data positive input end of the USB-to-Ethernet signal chip and a USB data negative input end of the USB-to-Ethernet signal chip;
the first network communication signal output end comprises a first channel positive input-output end of the USB-to-Ethernet signal chip, a first channel negative input-output end of the USB-to-Ethernet signal chip, a second channel positive input-output end of the USB-to-Ethernet signal chip, a second channel negative input-output end of the USB-to-Ethernet signal chip, a third channel positive input-output end of the USB-to-Ethernet signal chip, a third channel negative input-output end of the USB-to-Ethernet signal chip, a fourth channel positive input-output end of the USB-to-Ethernet signal chip and a fourth channel negative input-output end of the USB-to-Ethernet signal chip.
4. The network-based heterogeneous video conferencing device of claim 1, wherein the sub-board further comprises:
a video input component connected with the second control circuit and configured to forward local video signals;
the second control circuit is further configured to generate a third network communication signal from the local video signal;
the switch circuit is further configured to generate a fourth network communication signal from a plurality of the third network communication signals;
the first control circuit is further configured to generate a second communication signal from the fourth network communication signal and transmit the second communication signal over a wired communication link.
5. The network-based heterogeneous video conferencing device of claim 2, wherein the motherboard further comprises:
a wireless communication circuit configured to generate a first wired communication signal from a first wireless communication signal received by the wireless communication link, and to generate a second wireless communication signal from a second wired communication signal and to transmit the second wireless communication signal from the wireless communication link;
the first control circuit is further configured to generate the first serial signal from the first wired communication signal and to generate the second wired communication signal from the second serial signal.
6. The network-based heterogeneous video conferencing device of claim 2, wherein the motherboard further comprises:
a network communication signal conversion circuit connected to the second control circuit and configured to generate the seventh network communication signal according to a fifth network communication signal and generate a sixth network communication signal according to an eighth network communication signal;
the switch circuit is specifically configured to generate a plurality of the second network communication signals and a plurality of the fifth network communication signals from the first network communication signals and to generate the fourth network communication signals from a plurality of the third network communication signals and a plurality of the sixth network communication signals;
the second control circuit is specifically configured to generate the video signal from the seventh network communication signal and to generate the eighth network communication signal from the local video signal.
7. The network-based heterogeneous video conferencing device of claim 4, wherein the network communication signal conversion circuitry comprises an Ethernet transceiver;
the Ethernet transceiver comprises a plurality of groups of fifth network communication signal input ends, a plurality of groups of sixth network communication signal output ends, a plurality of groups of seventh network communication signal output ends and a plurality of groups of eighth network communication signal input ends;
wherein the set of fifth network communication signal inputs comprises a pair of differential signal inputs of the Ethernet transceiver;
a set of said sixth network communication signal outputs comprises a pair of differential signal outputs of said ethernet transceiver;
a set of said seventh network communication signal outputs and a set of said eighth network communication signal inputs together comprise a media independent interface of a channel of said ethernet transceiver.
8. The network-based heterogeneous video conferencing device of claim 2, wherein the video input component comprises an HDMI interface circuit, an SDI interface circuit, a VGA interface circuit, and a USB interface circuit.
9. The network-based heterogeneous video conferencing device of claim 4, wherein the motherboard further comprises:
the trigger component is connected with the first control circuit and used for generating a trigger signal;
the first control circuit is further configured to generate the first network communication signal according to the trigger signal;
the second control circuit is further configured to generate the video signal from the local video signal and the second network communication signal.
10. The network-based heterogeneous video conferencing device of claim 9, wherein the sub-board further comprises:
the serial communication circuit is connected with the second control circuit and is configured to convert the asynchronous communication signal into a pan-tilt control signal;
the second control circuit is further configured to generate the asynchronous communication signal from the second network communication signal.
11. The network-based heterogeneous video conferencing device of claim 1, wherein the motherboard further comprises:
the audio interface circuit is connected with the first control circuit and is configured to transfer an original audio signal;
the audio output circuit is connected with the first control circuit and configured to play according to a target audio signal;
the first control circuit is further configured to generate the target audio signal from the original audio signal.
12. The network-based heterogeneous video conferencing device of claim 2, wherein the switch circuit comprises an ethernet switch chip;
the Ethernet switching chip comprises a group of first network communication signal input ends, a plurality of groups of second network communication signal output ends, a plurality of groups of fifth network communication signal output ends and a plurality of groups of sixth network communication signal input ends;
wherein a group of the first network communication signal input ends comprises a media independent interface of a channel of the Ethernet switching chip;
a group of the second network communication signal output ends comprise a media independent interface of one channel of the Ethernet switching chip;
the group of fifth network communication signal output ends comprises a pair of differential signal output ends of an Ethernet switching chip;
a set of the sixth network communication signal inputs includes a pair of differential signal inputs of an ethernet switch chip.
13. The network-based heterogeneous video conferencing device of claim 1, wherein the first control circuit comprises a first microprocessor;
and the USB data positive output end of the first microprocessor and the USB data negative output end of the first microprocessor jointly form a first serial signal output end of the first control circuit.
14. The network-based heterogeneous video conferencing device of claim 1, wherein the second control circuit comprises a digital signal processing chip;
the first channel positive input-output end of the digital signal processing chip, the first channel negative input-output end of the digital signal processing chip, the second channel positive input-output end of the digital signal processing chip, the second channel negative input-output end of the digital signal processing chip, the third channel positive input-output end of the digital signal processing chip, the third channel negative input-output end of the digital signal processing chip, the fourth channel positive input-output end of the digital signal processing chip and the fourth channel negative input-output end of the digital signal processing chip jointly form a second network communication signal input end of the second control circuit.
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