CN110661749A

CN110661749A - Video signal processing method and video networking terminal

Info

Publication number: CN110661749A
Application number: CN201810688890.8A
Authority: CN
Inventors: 彭宇龙; 韩杰; 王艳辉; 彭郑君
Original assignee: Visionvera Information Technology Co Ltd
Current assignee: Visionvera Information Technology Co Ltd
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2020-01-07

Abstract

The embodiment of the invention provides a video signal processing method and a video network terminal, wherein the method is applied to the video network terminal, the video network terminal comprises an encoding chip, a data interface UVC, a decoding chip and two transcoding chips, the encoding chip and the decoding chip are connected to the data interface UVC, and the transcoding chips are connected with the encoding chip, and the video network terminal comprises the following steps: a transcoding chip receives a first video signal; the transcoding chip converts the first video signal into a second video signal readable by the coding chip and transmits the second video signal to the coding chip; the coding chip codes the second video signal into a third video signal; the data interface UVC transmits the third video signal from the coding chip to the decoding chip; and the decoding chip sends the third video signal to a video network server. For the encoding chips such as HDMI which do not support receiving high-definition video signals in most cases, the encoding chips may be configured with transcoding chips and received after transcoding, so as to realize high-definition video signal transmission in the video network.

Description

Video signal processing method and video networking terminal

Technical Field

The present invention relates to the field of video networking technologies, and in particular, to a video signal processing method and a video networking terminal.

Background

With the rapid development of network technologies, video communication such as video conferences and video teaching is widely popularized in the aspects of life, work, learning and the like of users.

At present, the video communication has a High Definition requirement on video signals, and the video signals are mostly HDMI (High Definition Multimedia Interface) signals, and the resolution can reach 4K.

However, most of the current encoding chips do not support receiving HDMI signals, which limits high-definition video signal transmission.

Disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a video signal processing method and a video network terminal that overcome or at least partially solve the above problems.

According to an aspect of the present invention, there is provided a video signal processing method applied in a video network terminal, where the video network terminal includes an encoding chip, a data interface UVC, a decoding chip, and two transcoding chips, the encoding chip and the decoding chip are connected to the data interface UVC, and the transcoding chip is connected to the encoding chip, the method includes:

a transcoding chip receives a first video signal;

the transcoding chip converts the first video signal into a second video signal readable by the coding chip and transmits the second video signal to the coding chip;

the coding chip codes the second video signal into a third video signal;

the data interface UVC transmits the third video signal from the coding chip to the decoding chip;

and the decoding chip sends the third video signal to a video network server.

Optionally, the data interface UVC transmits the third video signal from an encoding chip to a decoding chip, and includes:

confirming that the decoding chip is a host controller and the coding chip is peripheral equipment;

transmitting the third video signal from the peripheral device to the host controller.

Optionally, the method further comprises:

the coding chip codes the second video signal into a first video signal;

the data interface UVC transmits the first video signal from the coding chip to the decoding chip;

and the decoding chip outputs the first video signal for playing.

Optionally, the data interface UVC transmits the first video signal from an encoding chip to a decoding chip, and includes:

transmitting the first video signal from the peripheral device to the host controller.

Optionally, the method further comprises:

the decoding chip receives a third video signal sent by the video networking server according to a downlink communication link configured for the video networking terminal by the video networking server;

the decoding chip decodes the third video signal into the first video signal;

the data interface UVC transmits the first video signal from a decoding chip to an encoding chip;

and the coding chip outputs the first video signal for playing.

Optionally, the data interface UVC transmits the first video signal from a decoding chip to an encoding chip, and includes:

transmitting the third video signal from the host controller to the peripheral device.

Optionally, the first video signal comprises a high definition multimedia interface, HDMI, signal, the second video signal comprises a mobile industry processor interface, MIPI, signal, and the third video signal comprises a high efficiency video coding, h.265, signal.

According to another aspect of the invention, a video network terminal is provided, which comprises an encoding chip, a data interface UVC, a decoding chip, and two transcoding chips, wherein the encoding chip and the decoding chip are connected to the data interface UVC, and the transcoding chips are connected to the encoding chip;

the transcoding chip is used for receiving a first video signal, converting the first video signal into a second video signal readable by the coding chip and transmitting the second video signal to the coding chip;

the coding chip is used for coding the second video signal into a third video signal;

the data interface UVC is used for transmitting the third video signal from the coding chip to the decoding chip;

and the decoding chip is used for sending the third video signal to a video network server.

Optionally, the data interface UVC is further configured to:

Alternatively,

the coding chip is also used for coding the second video signal into a first video signal;

the data interface UVC is further used for transmitting the first video signal from the coding chip to the decoding chip;

and the decoding chip is also used for outputting the first video signal to play.

Optionally, the data interface UVC is further configured to:

Alternatively,

the decoding chip is further used for receiving a third video signal sent by the video networking server according to a downlink communication link configured for the video networking terminal, and decoding the third video signal into the first video signal;

the data interface UVC is also used for transmitting the first video signal from the decoding chip to the coding chip;

and the coding chip is also used for outputting the first video signal to play.

Optionally, the data interface UVC is further configured to:

The embodiment of the invention has the following advantages:

in the embodiment of the invention, the transcoding chip receives a first video signal, converts the first video signal into a second video signal readable by the coding chip and transmits the second video signal to the coding chip, the coding chip codes the second video signal into a third video signal, the data interface UVC transmits the third video signal from the coding chip to the decoding chip, and the decoding chip transmits the third video signal to the video network server.

Drawings

FIG. 1 is a networking diagram of a video network, according to one embodiment of the invention;

FIG. 2 is a diagram illustrating a hardware architecture of a node server according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a hardware structure of an access switch according to an embodiment of the present invention;

fig. 4 is a schematic hardware structure diagram of an ethernet protocol conversion gateway according to an embodiment of the present invention;

FIG. 5 is a flow chart illustrating steps of a method for processing a video signal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a video network terminal according to an embodiment of the present invention;

FIG. 7 is a flow chart illustrating steps of another method for processing a video signal in accordance with one embodiment of the present invention;

FIG. 8 is a flowchart illustrating steps of a method for processing a video signal according to another embodiment of the present invention;

fig. 9 is a block diagram of a terminal of a video network according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.

The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.

To better understand the embodiments of the present invention, the following description refers to the internet of view:

some of the technologies applied in the video networking are as follows:

network Technology (Network Technology)

Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network circuit Switching (circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.

Switching Technology (Switching Technology)

The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.

Server Technology (Server Technology)

The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.

Storage Technology (Storage Technology)

The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.

Network Security Technology (Network Security Technology)

The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.

Service Innovation Technology (Service Innovation Technology)

The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.

Networking of the video network is as follows:

the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.

As shown in fig. 1, the video network is divided into an access network and a metropolitan network.

The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.

The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.

Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.

The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.

The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.

Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.

The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.

Video networking device classification

1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.

1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).

The specific hardware structure of each access network device is as follows:

a node server:

as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;

the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.

The access switch:

as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;

wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the data packet coming from the CPU module 204 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.

The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:

if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;

if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.

The rate control module 208 is configured by the CPU module 204, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.

The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.

Ethernet protocol conversion gateway：

As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.

Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;

the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MACSA of the ethernet coordination gateway, and the ethernet length or frame type, and sends the packet.

The other modules in the ethernet protocol gateway function similarly to the access switch.

A terminal:

the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.

1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.

2. Video networking packet definition

2.1 Access network packet definition

The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.

As shown in the following table, the data packet of the access network mainly includes the following parts:

DA

SA

Reserved

Payload

CRC

wherein:

the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;

the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);

the reserved byte consists of 2 bytes;

the payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;

the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.

2.2 metropolitan area network packet definition

The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.

In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.

As shown in the following table, the data packet of the metro network mainly includes the following parts:

DA

SA

Reserved

label (R)

Payload

CRC

Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.

Referring to fig. 5, a flowchart illustrating steps of a method for processing a video signal according to an embodiment of the present invention is shown, which may specifically include the following steps:

step 501, a transcoding chip receives a first video signal.

In a specific implementation, the embodiment of the invention can be applied to a video network terminal located in a video network.

As shown in fig. 6, the video network terminal includes an encoding chip 601, a data interface UVC602, a decoding chip 603, and two transcoding chips 604, where the encoding chip 601 and the decoding chip 603 access the data interface UVC602, and the transcoding chip 604 is connected to the encoding chip 601.

Each transcoding chip 604 has a video input interface 6041 (e.g., HDMI _ IN interface), the encoding chip 601 has a video output interface 6011 (e.g., HDMI _ OUT interface), and the decoding chip 603 has a video networking interface 6031 and a video output interface 6032 (e.g., HDMI _ OUT interface).

Each transcoding chip receives an externally input first video signal through the video input interface.

In scenes such as video conferences, one transcoding chip can receive a first video signal acquired by a camera through a video input interface, and the other transcoding chip can receive the first video signal output by equipment such as a computer through the video input interface.

In one example, the first video signal comprises a high definition multimedia interface, HDMI, signal.

Step 502, the transcoding chip converts the first video signal into a second video signal readable by the encoding chip, and transmits the second video signal to the encoding chip.

In the embodiment of the present invention, the transcoding chip may be configured to perform transcoding processing on the video signal.

If the first video signal with high definition can not be directly received by the interface of the coding chip, the transcoding chip converts the first video signal into a second video signal which can be received by the coding chip and transmits the second video signal to the coding chip.

In one example, the second video signal includes a Mobile Industry Processor Interface (MIPI) signal.

For example, if the encoding chip is Hi3559A, and the Bt1120 interface of the encoding chip cannot acquire the HDMI signal of 4K, the transcoding chip converts the HDMI signal into an MIPI signal, and the Hi3559A acquires the HDMI signal of 4K through an MIPI channel.

In step 503, the encoding chip encodes the second video signal into a third video signal.

In the embodiment of the present invention, the encoding chip may be used to encode a video signal.

If the second video signal converted by the transcoding chip is received by the encoding chip, the second video signal can be encoded into a third video signal.

In one example, the third video signal comprises a high efficiency video coding h.265 signal.

For example, if the encoding chip is Hi3559A, the transcoding chip converts the HDMI signal into an MIPI signal, and transmits the MIPI signal to Hi3559A, and Hi3559A encodes the MIPI signal into an h.265 signal.

Meanwhile, the encoding chip may encapsulate the data packet of the third video signal by the 2000 specification of the following video networking protocol to be suitable for transmission in the video networking:

in step 504, the data interface UVC transmits the third video signal from the encoding chip to the decoding chip.

The data interface uvc (USB video class) is compliant with the USB specification by applying a protocol standard defined by a USB (Universal Serial Bus) video capture device, and can transmit the third video signal from the encoding chip to the decoding chip in a file stream form without unpacking and packing, so that the transmission speed is fast and the transmission delay is low.

In one embodiment of the invention, step 504 may include the following sub-steps:

substep S11, confirming that the decoding chip is a host controller and the coding chip is peripheral equipment;

sub-step S12, transmitting the third video signal from the peripheral device to the host controller.

USB is a master-slave architecture, the Host controller is called Host and the peripheral Device is called Device, and data exchange between Host and Device occurs.

In the embodiment of the invention, the decoding chip is set as a host controller, and the coding chip is set as a peripheral device.

The peripheral device submits a third device signal to its upper hub, which is handed over to a further upper hub until the host controller.

It should be noted that, in the embodiment of the present invention, the decoding chip may be set as a peripheral device, the encoding chip is set as a host controller, and the third video signal is transmitted from the host controller to the peripheral device, which is not limited in this respect.

And step 505, the decoding chip sends the third video signal to a video network server.

And the decoding chip receives a third video signal sent by the data interface UVC, and then can call the video networking interface and send the third video signal to the video networking server.

In a video conference and other scenes, the video network server sends a third video signal to another video network terminal according to a downlink communication link configured for the other video network terminal (namely, other video network terminals participating in the video conference), and plays the third video signal after decoding.

Referring to fig. 7, a flowchart illustrating steps of another video signal processing method according to an embodiment of the present invention is shown, which may specifically include the following steps:

in step 701, a transcoding chip receives a first video signal.

Step 702, the transcoding chip converts the first video signal into a second video signal readable by the encoding chip and transmits the second video signal to the encoding chip.

And step 703, the coding chip codes the second video signal into a third video signal.

Step 704, the data interface UVC transmits the third video signal from the encoding chip to the decoding chip.

Step 705, the decoding chip sends the third video signal to a video network server.

In step 706, the encoding chip encodes the second video signal into a first video signal.

In the embodiment of the present invention, for the second video signal, the encoding chip respectively performs two processes, one process is to encode the second video signal (e.g., MIPI signal) into the third video signal (e.g., h.265 signal), and the other process is not to re-encode the second video signal (e.g., MIPI signal) into the first video signal (e.g., HDMI signal).

After that, the coding chip sends the first video signal and the third video signal to the data interface UVC.

In step 707, the data interface UVC transmits the first video signal from the encoding chip to the decoding chip.

If the data interface UVC receives the first video signal sent by the encoding chip, the first video signal may be transmitted to the decoding chip.

In one embodiment of the present invention, step 707 may include the following sub-steps:

and a substep S21 of determining the decoding chip as the host controller and the coding chip as the peripheral device.

Sub-step S22, transmitting the first video signal from the peripheral device to the host controller.

The peripheral device submits the first video signal to its upper hub, which is handed over to a higher hub until the host controller.

It should be noted that, in the embodiment of the present invention, the decoding chip may be set as a peripheral device, the encoding chip is set as a host controller, and the first video signal is transmitted from the host controller to the peripheral device, which is not limited in this embodiment of the present invention.

Step 708, the decoding chip outputs the first video signal for playing.

The decoding chip calls a video output interface (such as an HDMI _ OUT interface) to output the first video signal (such as an HDMI signal) to a connected device (such as a television) for playing.

In scenes such as video conferences, the video signals locally acquired by the current video networking terminal are output and played at the equipment connected with the current video networking terminal, so that the local playing of the video signals can be realized.

Referring to fig. 8, a flowchart illustrating steps of a method for processing a video signal according to another embodiment of the present invention may specifically include the following steps:

step 801, a decoding chip receives a third video signal sent by a video network server according to a downlink communication link configured for the video network terminal by the video network server.

In scenes such as a video conference and the like, another video networking terminal collects a first video signal, encodes the first video signal into a third video signal and sends the third video signal to a video networking server, and the video networking server can send the third video signal to the current video networking terminal according to a downlink communication link configured for the current video networking terminal.

In practical applications, the video network is a network with a centralized control function, and includes a master control server and a lower level network device, where the lower level network device includes a terminal, and one of the core concepts of the video network is to configure a table for a downlink communication link of a current service by notifying a switching device by the master control server, and then transmit a data packet based on the configured table.

Namely, the communication method in the video network includes:

and the master control server configures the downlink communication link of the current service.

And transmitting the data packet of the current service sent by the source terminal to a target terminal (such as another video network terminal) according to the downlink communication link.

In the embodiment of the present invention, configuring the downlink communication link of the current service includes: and informing the switching equipment related to the downlink communication link of the current service to allocate the table.

Further, transmitting according to the downlink communication link includes: the configured table is consulted, and the switching equipment transmits the received data packet through the corresponding port.

In particular implementations, the services include unicast communication services and multicast communication services. Namely, whether multicast communication or unicast communication, the core concept of the table matching-table can be adopted to realize communication in the video network.

As mentioned above, the video network includes an access network portion, in which the master server is a node server and the lower-level network devices include an access switch and a terminal.

For the unicast communication service in the access network, the step of configuring the downlink communication link of the current service by the master server may include the following steps:

and a substep S31, the main control server obtains the downlink communication link information of the current service according to the service request protocol packet initiated by the source terminal, wherein the downlink communication link information includes the downlink communication port information of the main control server and the access switch participating in the current service.

In the substep S32, the main control server sets a downlink port to which a packet of the current service is directed in a packet address table inside the main control server according to the downlink communication port information of the control server; and sending a port configuration command to the corresponding access switch according to the downlink communication port information of the access switch.

In sub-step S33, the access switch sets the downstream port to which the packet of the current service is directed in its internal packet address table according to the port configuration command.

For a multicast communication service (e.g., video conference) in the access network, the step of the master server obtaining downlink information of the current service may include the following sub-steps:

in sub-step S41, the main control server obtains a service request protocol packet initiated by the target terminal and applying for the multicast communication service, where the service request protocol packet includes service type information, service content information, and an access network address of the target terminal.

Wherein, the service content information includes a service number.

And a substep S42, the main control server extracts the access network address of the source terminal in a preset content-address mapping table according to the service number.

In the substep of S43, the main control server obtains the multicast address corresponding to the source terminal and distributes the multicast address to the target terminal; and acquiring the communication link information of the current multicast service according to the service type information and the access network addresses of the source terminal and the target terminal.

Step 802, a decoding chip decodes the third video signal into the first video signal.

In the embodiment of the invention, a decoding chip (such as Hi3536) can be used for decoding the video signal.

The decoding chip receives a third video signal (such as an H.265 signal) sent by the video networking server through the video networking interface according to the video networking protocol, and can decode the third video signal (such as the H.265 signal) into a first video signal (such as an HDMI signal).

In step 803, the data interface UVC transmits the first video signal from the decoding chip to the encoding chip.

If the data interface UVC receives the first video signal sent by the decoding chip, the first video signal may be transmitted to the encoding chip.

In one embodiment of the present invention, step 803 may include the following sub-steps:

and a substep S51 of determining the decoding chip as the host controller and the coding chip as the peripheral device.

Sub-step S52, transmitting the third video signal from the host controller to the peripheral device.

The host controller submits the first video signal through the root hub and then through the underlying hubs (if any) to the peripheral devices.

It should be noted that, in the embodiment of the present invention, the decoding chip may be set as a peripheral device, the encoding chip may be set as a host controller, and the first video signal is transmitted from the peripheral device to the host controller, which is not limited in this embodiment of the present invention.

And step 804, the coding chip outputs the first video signal for playing.

The encoding chip calls a video output interface (such as an HDMI _ OUT interface) to output a first video signal (such as an HDMI signal) to a connected device (such as a television) for playing.

In the scenes of video conference and the like, the video signal collected by the other video network terminal is output and played at the equipment connected with the current video network terminal, so that the video signal can be played in different places.

It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

Referring to fig. 9, a block diagram of a video network terminal according to an embodiment of the present invention is shown, where the video network terminal includes an encoding chip 910, a data interface UVC920, a decoding chip 930, and two transcoding chips 940, the encoding chip 910 and the decoding chip 930 access the data interface UVC920, and the transcoding chip 940 is connected to the encoding chip 910;

a transcoding chip 940, configured to receive a first video signal, convert the first video signal into a second video signal readable by an encoding chip, and transmit the second video signal to the encoding chip 910;

an encoding chip 910, configured to encode the second video signal into a third video signal;

a data interface UVC920, configured to transmit the third video signal from the encoding chip 910 to the decoding chip 930;

and a decoding chip 930 for sending the third video signal to the video network server.

In an embodiment of the present invention, the data interface UVC920 is further configured to:

confirming that the decoding chip 930 is a host controller and the encoding chip 910 is a peripheral device;

In one embodiment of the present invention,

the encoding chip 910 is further configured to encode the second video signal into a first video signal;

a data interface UVC920, further configured to transmit the first video signal from the encoding chip 910 to the decoding chip 930;

the decoding chip 930 is further configured to output the first video signal for playing.

In one embodiment of the present invention,

the decoding chip 930 is further configured to receive, according to a downlink communication link configured for the video networking terminal by the video networking server, a third video signal sent by the video networking server, and decode the third video signal into the first video signal;

a data interface UVC920, which is also used for transmitting the first video signal from a decoding chip to an encoding chip;

the encoding chip 910 is further configured to output the first video signal for playing.

In one example of an embodiment of the present invention, the first video signal comprises a high definition multimedia interface, HDMI, signal, the second video signal comprises a mobile industry processor interface, MIPI, signal, and the third video signal comprises a high efficiency video coding, h.265, signal.

For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The foregoing describes in detail a video signal processing method and a video network terminal provided by the present invention, and a specific example is applied in the present document to explain the principle and the implementation of the present invention, and the description of the foregoing embodiment is only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A video signal processing method is applied to a video network terminal, wherein the video network terminal comprises an encoding chip, a data interface UVC, a decoding chip and two transcoding chips, the encoding chip and the decoding chip are connected to the data interface UVC, and the transcoding chips are connected with the encoding chip, and the method comprises the following steps:

a transcoding chip receives a first video signal;

the coding chip codes the second video signal into a third video signal;

and the decoding chip sends the third video signal to a video network server.

2. The method according to claim 1, wherein the data interface UVC transmits the third video signal from an encoding chip to a decoding chip, comprising:

3. The method of claim 1, further comprising:

the coding chip codes the second video signal into a first video signal;

and the decoding chip outputs the first video signal for playing.

4. The method according to claim 3, wherein the data interface UVC transmits the first video signal from an encoding chip to a decoding chip, comprising:

5. The method according to any one of claims 1-4, further comprising:

the decoding chip decodes the third video signal into the first video signal;

and the coding chip outputs the first video signal for playing.

6. The method according to claim 5, wherein the data interface UVC transmits the first video signal from a decoding chip to an encoding chip, comprising:

7. The method of any of claims 1-4, wherein the first video signal comprises a High Definition Multimedia Interface (HDMI) signal, wherein the second video signal comprises a Mobile Industry Processor Interface (MIPI) signal, and wherein the third video signal comprises a high efficiency video coding (H.265) signal.

8. The terminal of the video network is characterized by comprising an encoding chip, a data interface UVC, a decoding chip and two transcoding chips, wherein the encoding chip and the decoding chip are connected to the data interface UVC, and the transcoding chips are connected with the encoding chip;

9. The video networking terminal of claim 8, wherein the data interface UVC is further configured to:

10. The video networking terminal of claim 8,