WO2021129885A1 - Procédé et système de transmission audio/vidéo basé sur un réseau ip - Google Patents

Procédé et système de transmission audio/vidéo basé sur un réseau ip Download PDF

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Publication number
WO2021129885A1
WO2021129885A1 PCT/CN2020/141741 CN2020141741W WO2021129885A1 WO 2021129885 A1 WO2021129885 A1 WO 2021129885A1 CN 2020141741 W CN2020141741 W CN 2020141741W WO 2021129885 A1 WO2021129885 A1 WO 2021129885A1
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WIPO (PCT)
Prior art keywords
signal
audio
video
node
encoded
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PCT/CN2020/141741
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English (en)
Chinese (zh)
Inventor
王飞
何常
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威创集团股份有限公司
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Publication of WO2021129885A1 publication Critical patent/WO2021129885A1/fr

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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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234381—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission

Definitions

  • the present invention relates to the field of audio and video technology, and more specifically, to an audio and video transmission method and system based on an IP network.
  • the audio and video transmission system composed of splicing walls and seats mainly adopts a centralized processor centralized control method, which has limited data processing capabilities. , Generally, it only supports the transmission of audio and video signals with up to 1080P resolution, and cannot support the transmission requirements of ultra-high-definition image quality.
  • the present invention aims to overcome the defect that the audio and video transmission system composed of the splicing wall and seats in the prior art cannot transmit ultra-high-definition picture quality audio and video signals, and provides an audio and video transmission method and system based on an IP network to solve the problem
  • the audio and video transmission system composed of splicing walls and seats cannot transmit ultra-high-definition picture quality audio and video signals.
  • the technical solution adopted by the present invention is an audio and video transmission method based on an IP network.
  • the method includes: an IP encoding node collects original audio and video signals; and the IP encoding node encodes the original audio and video signals to generate The encoded signal corresponding to the original audio and video signal, the encoded signal is Ethernet data; the IP encoding node transmits the encoded signal to the designated IP decoding node through the switch of the IP network; the IP decoding node pair The coded signal is decoded to obtain a decoded signal corresponding to the coded signal; the IP decoding node performs image processing on the decoded signal to obtain a target audio and video signal whose output parameter is a specified output parameter.
  • the transmission of audio and video signals is performed based on the IP network, and the processing of the audio and video signals in each stage of the transmission process is completed by nodes, which can improve the data processing capacity of the audio and video transmission system.
  • the IP encoding node Convert the original audio and video signal into an encoded signal of Ethernet data type, so that the encoded signal can be transmitted in the switch of the IP network, and the IP decoding node performs image processing on the decoded signal to obtain the target audio and video whose output parameters are specified output parameters Signal, that is, the output resolution of the target audio and video signal can be 4K.
  • the present invention also provides an audio and video transmission system based on IP network, the system includes:
  • IP encoding node used to collect original audio and video signals; the IP encoding node establishes a communication connection with the switch of the IP network;
  • the IP encoding node is further configured to encode the original audio and video signal to generate an encoded signal corresponding to the original audio and video signal, and the encoded signal is Ethernet data;
  • the IP encoding node is further configured to transmit the encoded signal to a designated IP decoding node through the switch; the IP decoding node establishes a communication connection with the switch;
  • the IP decoding node is configured to decode the encoded signal to obtain a decoded signal corresponding to the encoded signal;
  • the IP decoding node is also used to perform image processing on the decoded signal to obtain a target audio and video signal whose output parameter is a specified output parameter.
  • the transmission of audio and video signals is performed based on the IP network, and the processing of the audio and video signals in each stage of the transmission process is completed by nodes, which can improve the data processing capacity of the audio and video transmission system.
  • the IP encoding node Convert the original audio and video signal into an encoded signal of Ethernet data type, so that the encoded signal can be transmitted in the switch of the IP network, and the IP decoding node performs image processing on the decoded signal to obtain the target audio and video whose output parameters are specified output parameters Signal, that is, the output resolution of the target audio and video signal can be 4K.
  • the present invention has the beneficial effects of improving the data processing capability of an audio and video transmission system composed of a wall connection and a seat, and solving the problem that the audio and video transmission system cannot transmit ultra-high-definition image quality audio and video signals.
  • Figure 1 is a network architecture diagram of an audio and video transmission system based on an IP network disclosed in the present invention.
  • Fig. 2 is a block diagram of the working principle of an IP encoding node disclosed in the present invention.
  • Fig. 3 is a block diagram of the working principle of an IP decoding node disclosed in the present invention.
  • Fig. 4 is a schematic flowchart of an audio and video transmission method based on an IP network disclosed in the present invention.
  • FIG. 5 is a schematic flowchart of another audio and video transmission method based on an IP network disclosed in the present invention.
  • Fig. 6 is a structural diagram of an audio and video transmission system based on an IP network disclosed in the present invention.
  • FIG. 1 is a network architecture diagram of an audio and video transmission system based on an IP network disclosed in the present invention. It is understandable that Figure 1 is only an exemplary network architecture diagram of the audio and video transmission system based on the IP network disclosed in the present invention.
  • the network architecture of the technical solution of the invention belongs to the protection scope of the invention, and there is no specific limitation on this.
  • the audio and video transmission system based on an IP network may include at least one IP encoding node and at least one IP decoding node, each IP encoding node and Each IP decoding node establishes a communication connection with a switch of the IP network.
  • the switch may be a gigabit switch.
  • the switch and the IP encoding node and the switch and the IP decoding node can be connected through a network cable or optical fiber.
  • Each IP encoding node is connected to at least one personal computer (PC) or other types of information sources.
  • PC personal computer
  • the IP encoding node and the information source can be connected through a high-definition multimedia interface (HDMI) cable.
  • HDMI high-definition multimedia interface
  • USB Universal Serial Bus
  • each IP decoding node is connected to at least one terminal for communication, such as a splicing wall or an agent terminal.
  • the agent terminal can be equipped with at least an agent display, keyboard, mouse, and U disk.
  • the IP decoding node and the splicing wall can be connected via HDMI cables. Connection, the IP decoding node and the agent terminal can be connected through a network cable or optical fiber.
  • the processing of audio and video signals in each stage of the transmission process can be completed by nodes.
  • FIG. 2 is a block diagram of the working principle of an IP encoding node disclosed in the present invention.
  • the two different IP encoding chips included in the IP encoding node are respectively connected with the high-speed signal extension integrated circuit and the universal serial bus hub (Universal Serial Bus). Hub, USB Hub), central control interface board, switch chip (specifically can be an Ethernet switch chip), and audio interface (specifically can be a 3.5mm audio interface) to establish a connection.
  • USB Hub Universal Serial Bus
  • switch chip specifically can be an Ethernet switch chip
  • audio interface specifically can be a 3.5mm audio interface
  • the high-speed signal expansion integrated circuit is connected to the HDMI interface (including the high-definition multimedia output interface and the high-definition multimedia input interface), the USB Hub is connected to USB (specifically TypeB USB), the central control interface board is connected to the central control interface, and Ethernet switching The chip is connected with RJ45 interface and SFP optical interface.
  • the IP encoding node collects the original audio and video signals through each interface connected to each of the high-speed signal expansion integrated circuit, USB Hub and the central control interface board, and is encoded by the IP encoding chip, and then the encoded signal obtained by the encoding is passed through the RJ45 interface by the Ethernet switching chip And the SFP optical port transmits the coded signal to the switch of the IP network.
  • FIG. 3 is a block diagram of the working principle of an IP decoding node disclosed in the present invention.
  • the IP decoding node includes two different IP decoding chips (specific dedicated IP decoding chips can be selected according to the decoding requirements), Field Programmable Gate Array (FPGA), USB Hub, Video interface chip, switching chip (specifically, Ethernet switch chip), audio interface (specifically, 3.5mm audio interface), and high-definition multimedia output interface.
  • FPGA Field Programmable Gate Array
  • Video interface chip specifically, Ethernet switch chip
  • audio interface specifically, 3.5mm audio interface
  • high-definition multimedia output interface The specific connection relationship is shown in Figure 3.
  • the IP decoding node receives the encoded signal through the RJ45 interface and the SFP optical port connected to the Ethernet switch chip, the Ethernet switch chip converts the encoded data obtained from the encoding into an encoded signal suitable for transmission in the chip, and the Ethernet switch chip encodes it
  • the encoded signal transmitted to the IP encoding chip is decoded by the IP decoding chip, and the decoded decoded signal is decoded by the FPGA to perform image processing to obtain the target audio and video signal, and then use each output interface to output according to the output requirements of the target audio and video signal Target audio and video signals.
  • FIG. 4 is a schematic flowchart of an audio and video transmission method based on an IP network disclosed in the present invention.
  • the audio and video transmission method based on an IP network disclosed in this embodiment may include the following steps:
  • the IP encoding node collects original audio and video signals.
  • the above-mentioned IP encoding node establishes a communication connection with the switch of the IP network.
  • the IP network may be a local area network composed of switches.
  • the switch may be a gigabit switch or other types of switches. Any two nodes entering the switch provide exclusive access.
  • the IP network may include at least one IP encoding node.
  • the working principle of the IP encoding node can be seen in Figure 2.
  • the IP encoding node collects original audio such as HDMI signals, audio signals, USB signals, and central control signals through the high-speed signal expansion integrated circuit, audio interface, USB Hub, and central control interface board. Video signal.
  • the IP encoding node supports audio and video data with multiple input parameters, such as audio and video data with a resolution of 4K and an image refresh rate of 60 Hz. Different input resolutions can be configured through VWAS software.
  • the IP encoding node encodes the foregoing original audio and video signal to generate an encoded signal corresponding to the original audio and video signal, where the encoded signal is Ethernet data.
  • the IP encoding node encodes the above-mentioned original audio and video signals. Specifically, it can be compressed and encoded by the dedicated IP encoding chip 1 and/or the dedicated IP encoding chip 1 shown in FIG. 2, so that the original audio and video signals are converted The resulting coded signal is easy to transmit in the IP network.
  • the IP encoding node transmits the encoded signal to the designated IP decoding node through the switch.
  • the aforementioned designated IP decoding node establishes a communication connection with the switch.
  • the IP network may include at least one IP decoding node, and the aforementioned designated IP decoding node may be selected from the IP decoding nodes included in the IP network.
  • the IP encoding node can transmit the encoded signal to the switch through the RJ45 Ethernet port, and then the switch transmits the encoded signal to the designated IP decoding node.
  • the network interface of the IP encoding node and the IP decoding node may be a Gigabit Ethernet electrical port or an optical port.
  • the above-mentioned switch may be a Gigabit switch.
  • the above-mentioned IP network-based audio and video transmission method may further include the following steps: the IP encoding node detects whether an audio and video transmission instruction is received, and the audio and video transmission instruction includes the device identification of the target terminal; if so, the IP encoding node Among the several IP encoding nodes corresponding to the device identifier, it is determined that the IP decoding node with the best network state is the designated IP decoding node. Allocating different designated IP decoding nodes for different terminals and rationally allocating network resources is conducive to improving the transmission speed of audio and video.
  • the IP decoding node decodes the encoded signal to obtain a decoded signal corresponding to the encoded signal.
  • the IP decoding node decodes the encoded signal, which can be specifically encoded by the dedicated IP decoding chip 1 and/or the dedicated IP decoding chip 1 shown in FIG. 3.
  • the IP decoding node performs image processing on the decoded signal to obtain a target audio and video signal whose output parameter is the specified output parameter.
  • the IP decoding node supports audio and video data with multiple output parameters, such as resolution.
  • output parameters can be set to 4K resolution and 60 Hz image refresh frequency according to actual needs. Different output resolutions can be configured through VWAS software.
  • All nodes can be managed through any IP encoding node, IP decoding node or switch, or through an agent terminal connected to any IP decoding node.
  • the implementation of the audio and video transmission method of the IP network shown in Figure 4 the transmission of audio and video signals based on the IP network, the sub-nodes complete the processing of the audio and video signals in each stage of the transmission process, and improve the audio and video transmission system The data processing capability of the, and then can transmit ultra-high-definition picture quality audio and video signals.
  • FIG. 5 is a schematic flowchart of another audio and video transmission method based on an IP network disclosed in the present invention.
  • the audio and video transmission method based on an IP network disclosed in this embodiment may include the following steps:
  • the IP encoding node collects original audio and video signals.
  • the IP encoding node establishes a communication connection with the switch of the IP network.
  • the IP encoding node divides the original audio and video signal into a first audio and video sub-signal and a second audio and video sub-signal.
  • the IP encoding node encodes the first audio and video sub-signal to obtain the first encoded signal corresponding to the first audio and video sub-signal, and encodes the second audio and video sub-signal to obtain the second audio and video sub-signal corresponding to the The second coded signal.
  • the IP encoding node generates an encoded signal corresponding to the original audio and video signal according to the first encoded signal and the second encoded signal, where the encoded signal is Ethernet data.
  • steps 502 to 504 the audio and video signals collected by the IP encoding node on the interface are divided into two audio and video stream channels through the high-speed signal expansion integrated circuit chip, namely the first audio and video sub-signal and the second audio and video stream.
  • the audio and video sub-signals are compressed and encoded on two different dedicated IP encoding chips respectively.
  • the system delay introduced by the two IP encoding chips is different.
  • Two different IP encoding chips respectively compress and encode the first audio and video sub-signal and the second audio and video sub-signal to convert them into Ethernet data, and then input a piece of switching chip, and then connect to the two panels of the panel through the switching chip.
  • Road RJ45 interface The system delay introduced by the two IP encoding chips.
  • Two different IP encoding chips respectively compress and encode the first audio and video sub-signal and the second audio and video sub-signal to convert them into Ethernet data, and then input a piece of switching chip, and then connect to the two panels of the panel through the switching chip.
  • the Ethernet output panel interface of the IP encoding node also supports 1 SFP optical port output.
  • One SFP optical port and two RJ45 ports can be fully exchanged through the switching chip.
  • Using two different IP encoding chips can not only increase the system's audio and video stream acquisition and processing capacity, but also flexibly select different channels or perform channel backups to ensure application reliability.
  • Through the central control interface it can also receive and send infrared signals, and the serial port asynchronous transmission standard interface RS232 signal.
  • the IP encoding node transmits the encoding signal to the designated IP decoding node through the switch.
  • the aforementioned designated IP decoding node establishes a communication connection with the switch.
  • the IP decoding node divides the coded signal into a first coded sub-signal and a second coded sub-signal.
  • this embodiment may further include the following steps:
  • the IP encoding node detects whether the display parameters of the original audio and video signals meet the preset display parameters; if so, perform step 506; if not, it can re-collect new original audio and video signals.
  • the IP encoding node can loop out and display the original audio and video data collected by the interface, thereby detecting whether the input signal is normal and locally displayed, that is, detecting whether the display parameters of the original audio and video signals meet the preset display parameters. Conducive to improving the success rate of audio and video transmission.
  • the IP decoding node decodes the first encoded sub-signal to obtain the first decoded signal corresponding to the first encoded sub-signal, and decodes the second encoded sub-signal to obtain the second decoded corresponding to the second encoded sub-signal signal.
  • the IP decoding node obtains a decoded signal corresponding to the encoded signal according to the first decoded signal and the second decoded signal.
  • the IP decoding node performs image processing on the decoded signal to obtain a target audio and video signal whose output parameter is the specified output parameter.
  • the decoding channel of the IP decoding node is divided into two channels.
  • the encoded signal is received from the RJ45 interface or SFP optical port of the panel, sent to the switching chip, and then divided by the switching chip
  • the first coding sub-signal and the second coding sub-signal are respectively sent to two dedicated IP decoding chips.
  • the two IP decoding chips are sent to the FPGA chip or directly output from the decoding chip to the panel interface.
  • processing such as image cutting, scaling, superimposing, and splicing will be performed inside the FPGA, and then sent to the dedicated video output interface chip, and the interface chip is sent to the panel interface.
  • the IP decoding node supports two different IP decoding chips to realize normal decoding without application scenarios.
  • step 509 may include: the IP decoding node determines whether the output parameter of the decoded signal matches the specified output parameter; if not, the IP decoding node determines the image according to the output parameter of the decoded signal and the specified output parameter Processing method, the image processing method includes at least one of image cutting, image scaling, image overlay and image splicing; the IP decoding node performs image processing on the decoded signal according to the image processing method to obtain the target audio and video whose output parameters are specified output parameters signal.
  • the implementation of this embodiment can perform image processing according to the specified output parameters, so that the output target audio and video signals are more in line with user needs, which is beneficial to improve user viscosity.
  • both the IP encoding node and the IP decoding node support the KVM function and the U disk function.
  • the IP encoding node is connected to the above-mentioned IP encoding chip by the TypeB USB interface through the USB Hub chip, which can realize the information transfer between the keyboard and mouse information, U disk data and PC/source terminal accessed by the IP decoding node .
  • the USB interface type of the IP decoding node can be a TypeA interface, which can be specifically used as a keyboard, mouse interface and U disk interface to complete the access of keyboard and mouse signals and U disk data.
  • the USB interface conforms to the USB2.0 interface specification, and the maximum transmission rate is 480Mbps.
  • the USB signal connected from the IP decoding node will be converted into Ethernet data by the above IP decoding chip, and finally transmitted to the designated IP encoding node via the IP network.
  • the audio and video transmission system based on the IP network can use the switch group LAN, only need to develop the IP encoding and IP decoding node equipment and upper management software, compared with the original centralized processor, a series of collection, processing, control, and switching are required to be developed.
  • the difficulty of development work such as, backplane, etc. is greatly reduced, which can effectively reduce project risks and reduce project development cycles.
  • the IP network-based audio and video transmission system can complete the networking with a universal Gigabit switch. The networking and expansion are convenient.
  • the system supports two encoding and decoding hardware solutions, which can achieve backup and increase channel capacity, and support different delay performance , In addition, it also supports application scenarios of multiple resolutions, and can access and output multiple resolutions through software control, with better compatibility.
  • the implementation of the audio and video transmission method of the IP network shown in Figure 5 the transmission of audio and video signals based on the IP network, the sub-nodes complete the processing of each stage of the audio and video signal in the transmission process, and improve the audio and video transmission system
  • the use of two encoding channels and two decoding channels can not only increase the audio and video stream acquisition and processing capacity of the audio and video transmission system, but also can flexibly select different channels or perform channel backups to improve reliability.
  • detecting whether the display parameters of the original audio and video signals meet the preset display parameters is beneficial to improve the success rate of audio and video transmission.
  • image processing can be performed according to the specified output parameters, so that the output target audio and video signals are more in line with user needs, which is beneficial to improve user viscosity.
  • FIG. 6 is a structural diagram of an audio and video transmission system based on an IP network disclosed in the present invention.
  • the audio and video transmission system based on an IP network disclosed in this embodiment may include:
  • the IP encoding node 601 is used to collect original audio and video signals; the IP encoding node 601 establishes a communication connection with the switch 603 of the IP network;
  • the IP encoding node 601 is also used to encode the original audio and video signal to generate an encoded signal corresponding to the original audio and video signal, and the encoded signal is Ethernet data;
  • the IP encoding node 601 is also used to transmit the encoded signal to the designated IP decoding node 602 through the switch 603; the IP decoding node 602 establishes a communication connection with the switch 603;
  • the IP encoding node 601 is also used to detect whether an audio and video transmission instruction is received.
  • the audio and video transmission instruction includes the device identification of the target terminal; if so, the IP encoding node 601 obtains a number of IP encoding nodes corresponding to the device identification.
  • the IP decoding node 602 with the best network status is the designated IP decoding node 602. Allocating different designated IP decoding nodes 602 to different terminals, and reasonably allocating network resources, is beneficial to improve the transmission speed of audio and video.
  • the IP decoding node 602 is used to decode the encoded signal to obtain the decoded signal corresponding to the encoded signal;
  • the IP decoding node 602 is also used to perform image processing on the decoded signal to obtain the target audio and video signal whose output parameter is the specified output parameter.
  • the implementation of the audio and video transmission system of the IP network shown in Figure 6 is based on the IP network for the transmission of audio and video signals.
  • the sub-nodes complete the processing of the audio and video signals in each stage of the transmission process, which improves the audio and video transmission system The data processing capability of the, and then can transmit ultra-high-definition picture quality audio and video signals.
  • FIG. 6 is a structural diagram of an audio and video transmission system based on an IP network disclosed in the present invention.
  • the audio and video transmission system based on an IP network shown in this embodiment is improved on the basis of Embodiment 3. Yes, in the audio and video transmission system based on the IP network shown in this embodiment:
  • the IP encoding node 601 is used to encode the original audio and video signal to generate an encoded signal corresponding to the original audio and video signal.
  • the specific method is as follows:
  • the IP encoding node 601 is used to divide the original audio and video signal into a first audio and video sub-signal and a second audio and video sub-signal; and to encode the first audio and video sub-signal to obtain the corresponding audio and video sub-signal.
  • a first encoded signal; and, encoding a second audio and video sub-signal to obtain a second encoded signal corresponding to the second audio and video sub-signal; and generating an original audio and video signal corresponding to the first encoded signal and the second encoded signal The encoded signal.
  • the method for the IP decoding node 602 to decode the encoded signal to obtain the decoded signal corresponding to the encoded signal is specifically as follows:
  • the IP decoding node 602 is configured to divide the coded signal into a first coded sub-signal and a second coded sub-signal; and decode the first coded sub-signal to obtain a first decoded signal corresponding to the first coded sub-signal; and , Decoding the second encoded sub-signal to obtain a second decoded signal corresponding to the second encoded sub-signal; and obtaining a decoded signal corresponding to the encoded signal according to the first decoded signal and the second decoded signal.
  • the IP encoding node 601 is also used to detect whether the display parameters of the original audio and video signal conform to the preset before dividing the original audio and video signal into the first audio and video signal and the second audio signal. Display parameters; IP encoding node 601, specifically used to divide the original audio and video signal into a first audio and video signal and a second audio signal when the display parameters of the original audio and video signal meet the preset display parameters. In addition, the IP encoding node 601 is also used to re-collect new original audio and video signals when the display parameters of the original audio and video signals do not meet the preset display parameters.
  • the IP encoding node can loop out and display the original audio and video data collected by the interface, thereby detecting whether the input signal is normal and locally displayed, that is, detecting whether the display parameters of the original audio and video signals meet the preset display parameters. Conducive to improving the success rate of audio and video transmission.
  • the method for the IP decoding node 602 to perform image processing on the decoded signal to obtain the target audio and video signal whose output parameter is the specified output parameter is specifically as follows:
  • the IP decoding node 602 is used to determine whether the output parameters of the decoded signal match the specified output parameters; and, when the output parameters of the decoded signal do not match the specified output parameters, determine the image according to the output parameters of the decoded signal and the specified output parameters Processing method, the image processing method includes at least one of image cutting, image scaling, image superimposition and image splicing; and image processing is performed on the decoded signal according to the image processing method to obtain the target audio and video signal whose output parameter is the specified output parameter .
  • the implementation of this embodiment can perform image processing according to the specified output parameters, so that the output target audio and video signals are more in line with user needs, which is beneficial to improve user viscosity.
  • the audio and video transmission system of the IP network shown in Embodiment 4 is based on the IP network for audio and video signal transmission, and the sub-nodes complete the processing of each stage of the audio and video signal in the transmission process, which improves the audio and video transmission system
  • the data processing capability of the and then can transmit ultra-high-definition picture quality audio and video signals.
  • the use of two encoding channels and two decoding channels can not only increase the audio and video stream acquisition and processing capacity of the audio and video transmission system, but also can flexibly select different channels or perform channel backups to improve reliability.
  • detecting whether the display parameters of the original audio and video signals meet the preset display parameters is beneficial to improve the success rate of audio and video transmission.
  • image processing can be performed according to the specified output parameters, so that the output target audio and video signals are more in line with user needs, which is beneficial to improve user viscosity.

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  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé et un système de transmission audio/vidéo basé sur un réseau IP, se rapportant au domaine technique des audios/vidéos, et capable de résoudre le problème d'incapacité d'un système de transmission audio/vidéo constitué d'une paroi d'épissage et d'agents pour transmettre des signaux audio/vidéo ayant une qualité d'image ultra-haute définition. Le procédé de transmission audio/vidéo basé sur un réseau IP comprend les étapes suivantes: un noeud de codage IP acquiert un signal audio/vidéo d'origine; le noeud de codage IP établit une connexion de communication avec un commutateur d'un réseau IP; le noeud de codage IP code le signal audio/vidéo d'origine pour générer un signal codé correspondant au signal audio/vidéo d'origine, le signal codé étant des données Ethernet; le noeud de codage IP transmet le signal codé à un noeud de décodage IP désigné au moyen du commutateur; le noeud de décodage IP établit une connexion de communication avec le commutateur; le noeud de décodage IP décode le signal codé pour obtenir un signal décodé correspondant au signal codé, et effectue un traitement d'image sur le signal décodé pour obtenir un signal audio/vidéo cible avec un paramètre de sortie qui est un paramètre de sortie désigné.
PCT/CN2020/141741 2019-12-23 2020-12-30 Procédé et système de transmission audio/vidéo basé sur un réseau ip WO2021129885A1 (fr)

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CN111770316B (zh) * 2020-07-22 2021-11-02 广州芯象科技有限公司 一种音视频编码器
CN112738428A (zh) * 2020-12-28 2021-04-30 威创集团股份有限公司 一种视频信号流转换装置及坐席协作系统
CN115988155B (zh) * 2023-03-20 2023-08-18 广州美凯信息技术股份有限公司 一种拼接显示方法及显示系统

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