CN110719425A

CN110719425A - Video data playing method and device

Info

Publication number: CN110719425A
Application number: CN201810758499.0A
Authority: CN
Inventors: 彭宇龙; 韩杰; 王艳辉; 杨春晖
Original assignee: Visionvera Information Technology Co Ltd
Current assignee: Visionvera Information Technology Co Ltd
Priority date: 2018-07-11
Filing date: 2018-07-11
Publication date: 2020-01-21

Abstract

The embodiment of the invention provides a method and a device for playing video data, wherein the method is applied to a video network and comprises the following steps: receiving a plurality of paths of video streams which are transmitted by a video networking terminal and collected by a plurality of wide-angle cameras distributed in a surrounding way; extracting multi-frame video data at the same time from the multi-path video stream respectively; carrying out duplicate removal processing on the multi-frame video data; and synchronously outputting the multiple frames of video data subjected to the de-duplication processing to a plurality of curved surface displays distributed in a surrounding way for playing. The panoramic camera shooting and the panoramic playing are realized, and the user can judge the user, the place and the like which the picture faces according to the position of the curved surface player, so that the simplicity and convenience of decision making, commanding and other operations are greatly improved.

Description

Video data playing method and device

Technical Field

The present invention relates to the field of video networking technologies, and in particular, to a method and an apparatus for playing video data.

Background

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

In a communication party, if a shooting range of one camera cannot accommodate a user, a place and the like to be shot, a plurality of cameras are usually deployed, and each camera is responsible for shooting an area, so that multiple paths of video data are collected and transmitted to another party.

The other side device synthesizes a plurality of paths of video data to output to one screen, and plays a plurality of pictures at the same time.

At this time, the user watching the video data on the other party needs to determine the user, the place, and the like to which the picture is directed, and the operations of decision making, commanding, and the like are complicated.

Disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a method and apparatus for playing video data that overcome or at least partially solve the above problems.

According to an aspect of the present invention, there is provided a method for playing video data, which is applied in a video network, the method including:

receiving a plurality of paths of video streams which are transmitted by a video networking terminal and collected by a plurality of wide-angle cameras distributed in a surrounding way;

extracting multi-frame video data at the same time from the multi-path video stream respectively;

carrying out duplicate removal processing on the multi-frame video data;

and synchronously outputting the multiple frames of video data subjected to the de-duplication processing to a plurality of curved surface displays distributed in a surrounding way for playing.

Optionally, the extracting multiple frames of video data at the same time from the multiple video streams respectively includes:

extracting multiple frames of video data from the multiple paths of video streams respectively;

selecting a reference time stamp from a plurality of time stamps corresponding to the multi-frame video data;

generating a time range using the reference timestamp;

and extracting the multi-frame video data with the time stamps within the time range from the multi-path video stream respectively.

Optionally, the selecting a reference timestamp from a plurality of timestamps corresponding to the multi-frame video data includes:

counting the number of the same time stamps from a plurality of time stamps corresponding to the multi-frame video data;

the most numerous timestamps are set as the reference timestamps.

Optionally, the performing the deduplication processing on the multiple frames of video data includes:

dividing two frames of target video data collected by two adjacent wide-angle cameras from the multi-frame video data;

detecting video area data with repeated contents in two frames of the target video data;

deleting the video area data in any one of the target video data.

Optionally, the performing the deduplication processing on the multiple frames of video data further includes:

if the two frames of target video data have dislocation in the vertical direction, generating error prompt information;

and sending the error prompt information to the video networking terminal.

Optionally, the synchronously outputting the multiple frames of video data after the deduplication processing to a plurality of curved displays distributed around the curved displays for playing includes:

inquiring a curved surface display corresponding to the video data aiming at each frame of video data after the duplicate removal processing;

and outputting the video data to the curved surface display for displaying.

Optionally, the shooting ranges of every two adjacent wide-angle cameras are at least partially overlapped, and the number of the wide-angle cameras and the curved-surface displays are equal and the distribution directions are the same.

According to another aspect of the present invention, there is provided a playing apparatus for video data, which is applied in a video network, the apparatus comprising:

the video stream receiving module is used for receiving a plurality of paths of video streams which are sent by a video networking terminal and collected by a plurality of wide-angle cameras distributed in a surrounding way;

the video data extraction module is used for respectively extracting multi-frame video data at the same time from the multi-path video stream;

the duplication removing processing module is used for carrying out duplication removing processing on the multi-frame video data;

and the synchronous playing module is used for synchronously outputting the multiple frames of video data subjected to the de-duplication processing to a plurality of curved surface displays distributed in a surrounding manner for playing.

Optionally, the video data extraction module includes:

the original extraction submodule is used for respectively extracting multi-frame video data from the multi-path video stream;

a reference timestamp selection submodule, configured to select a reference timestamp from multiple timestamps corresponding to the multiple frames of video data;

the time range generating submodule is used for generating a time range by adopting the reference time stamp;

and the time range extraction sub-module is used for respectively extracting the multi-frame video data with the time stamps within the time range from the multi-path video stream.

Optionally, the reference timestamp selection sub-module includes:

the number counting unit is used for counting the number of the same time stamps from a plurality of time stamps corresponding to the multi-frame video data;

and the time stamp setting unit is used for setting the time stamp with the largest number as the reference time stamp.

Optionally, the deduplication processing module includes:

the target video data dividing submodule is used for dividing two frames of target video data collected by two adjacent wide-angle cameras from the multi-frame video data;

the content repetition detection submodule is used for detecting video area data with repeated content in two frames of the target video data;

and the video area data deleting submodule is used for deleting the video area data in any target video data.

Optionally, the deduplication processing module further includes:

an error prompt message generation submodule, configured to generate an error prompt message if two frames of the target video data are misaligned in the vertical direction;

and the error prompt message sending submodule is used for sending the error prompt message to the video network terminal.

Optionally, the synchronized playing module includes:

the curved surface display inquiry submodule is used for inquiring the curved surface display corresponding to the video data aiming at each frame of video data after the duplication elimination processing;

and the video data output submodule is used for outputting the video data to the curved surface display for displaying.

The embodiment of the invention has the following advantages:

in the embodiment of the invention, a plurality of paths of video streams which are sent by a video network terminal and collected by a plurality of wide-angle cameras distributed in a surrounding way are received, multi-frame video data at the same moment are respectively extracted from the plurality of paths of video streams, the multi-frame video data are subjected to de-duplication processing, the multi-frame video data subjected to de-duplication processing are synchronously output to a plurality of curved surface displays distributed in the surrounding way for playing, panoramic shooting and panoramic playing are realized, a user can judge the user, the place and the like which are faced by a picture according to the position of the curved surface player, and the simplicity and convenience of operation such as decision making, command and the like are greatly improved.

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 flowchart illustrating steps of a method for playing video data according to an embodiment of the present invention;

FIG. 6 is an exemplary diagram of a wide-angle camera and curved display in accordance with one embodiment of the present invention;

fig. 7 is a block diagram of a video data playback apparatus 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 playing video data according to an embodiment of the present invention is shown, where the method may be applied in a video network, and specifically may include the following steps:

step 501, receiving a plurality of paths of video streams which are sent by a video network terminal and collected by a plurality of wide-angle cameras distributed in a surrounding manner.

In a service scenario of video communication such as video conference, live broadcast, and the like, video networking terminals are respectively disposed at two ends of the video communication, and the video networking terminals may be Set Top Boxes (STBs), generally called set top boxes or set top boxes, and are devices for connecting a television and an external signal source, and may convert compressed digital signals into television content and display the television content on the television.

Generally, the video network terminals may be connected to other devices, for example, the devices may be at least one camera and at least one microphone for collecting at least one video data and at least one audio data, and the devices may also be a television for playing the video data and the audio data.

It should be noted that the functions of the video networking terminal are relatively speaking, in a certain service scenario, a certain video networking terminal may collect video data and audio data and send the video data and audio data to the opposite terminal, and in other service scenarios, the video networking terminal may receive the video data and audio data sent by the opposite terminal video networking terminal and output the video data and audio data to other devices for playing.

In the embodiment of the invention, the video network of the opposite terminal is connected with the camera and is a wide-angle camera.

The wide angle means an angle degree of a fan angle with a camera lens as a central point from the lowermost end to the uppermost end of the shooting range of the camera, that is, an angle of the camera, and generally, the wider the angle of the camera, the larger the visible range.

In one example, the wide-angle camera may be a fisheye lens, which is a lens with a focal length of 16mm or less and an angle of view close to or equal to 180 °, and for the purpose of maximizing the photographic angle of view of the lens, the front lens of such a photographic lens is short in diameter and is parabolic and convex toward the front of the lens, much like the fish eye, and is so named.

The fisheye lens belongs to a special lens in an ultra-wide angle lens, and the visual angle of the fisheye lens is required to reach or exceed the range which can be seen by human eyes. Therefore, the fisheye lens is very different from the real world scene in human eyes because the scene seen by people in real life is in a regular fixed form, and the picture effect generated by the fisheye lens is beyond the scope.

When a user deploys the wide-angle cameras, the wide-angle cameras are distributed in a surrounding mode, namely, a certain thing is taken as a central point, and the wide-angle cameras are deployed around the thing to form a boundary of a curve or a circular ring.

Moreover, the shooting ranges of every two adjacent wide-angle cameras are at least partially overlapped, so that the shooting range formed by the wide-angle cameras is 360 degrees, and panoramic shooting is realized.

In one example, as shown in fig. 6, 6 wide-angle cameras are disposed at opposite ends of video communication, each wide-angle camera is disposed at an interval of 60 °, and the imaging range of each wide-angle camera is greater than 60 °, so that panoramic imaging can be achieved.

Gather multichannel video stream to a plurality of wide angle cameras, transmit to the video networking terminal, after the video networking terminal carries out the code respectively to multichannel video stream, can encapsulate the data package of video stream through the 2000 specifications of following video networking agreement to transmit in the video networking:

of course, besides video streams, video networking terminals may also capture audio streams and encapsulate the data packets of the audio streams for transmission in the video networking through the 2001 specification of the following video networking protocol:

and the video networking server sends the multiple paths of video streams and audio streams to the video networking terminal of the local terminal according to a downlink communication link configured for the video networking terminal of the local 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 a 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 S11, 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 S12, 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 S13, 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 S21, 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 S22, 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 S23, 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 502, extracting multiple frames of video data at the same time from the multiple video streams respectively.

For multiple video streams sent by the video network terminal of the opposite terminal, multiple buffer queues may be set respectively, and the multiple video streams are stored into the multiple buffer queues respectively.

And traversing each buffer queue, and extracting multi-frame video data at the same time from the multi-path video stream, so that the picture contents of the multi-frame video data are the same.

In one embodiment of the present invention, step 502 may include the following sub-steps:

and a substep S31 of extracting multiple frames of video data from the multiple video streams, respectively.

Generally, the video data with the top order is extracted from each video stream.

In sub-step S32, a reference time stamp is selected from a plurality of time stamps corresponding to the multi-frame video data.

When the video network terminal of the opposite terminal codes each frame of video data, a corresponding timestamp is marked.

The video network terminal of the local terminal can select a time stamp of each frame of extracted video data as a reference time stamp according to a set mode.

In one example, the number of identical timestamps is counted from among a plurality of timestamps corresponding to the multi-frame video data, and the most numerous timestamps are set as the reference timestamps.

In this example, since the video network terminals at the opposite end uniformly acquire and encode the video streams, the timestamps are the same and indicate that the video streams are at the same time.

And a substep S33 of generating a time range using the reference time stamp.

And a substep S34 of extracting multiple frames of video data with time stamps within the time range from the multiple video streams respectively.

In general, considering the staying time of human vision, the delay of network transmission and other factors, a time range can be generated by extending forward for a period of time and extending backward for a period of time with the reference time stamp as a base point.

Each video stream is traversed and video data of one frame in the time range is extracted as being in the same video data.

And 503, performing deduplication processing on the multiple frames of video data.

In a specific implementation, there may be overlap in partial areas of video data captured by the wide-angle camera, and in order to keep pictures single and coherent, after the decoding processing is performed on multiple frames of video data, the decoding processing is performed on the frames of video data, that is, the overlapped partial areas are removed.

In one embodiment of the present invention, step 503 may include the following sub-steps:

and a substep S31 of dividing two frames of target video data collected by two wide-angle cameras distributed adjacently from the multi-frame video data.

In sub-step S32, video region data with repeated content is detected in two frames of the target video data.

And a substep S33 of deleting the video region data in any of the target video data.

In the embodiment of the invention, because the shooting ranges of every two adjacent wide-angle cameras are at least partially overlapped, partial areas of the video data shot by every two adjacent wide-angle cameras are overlapped.

And traversing multi-frame video data, identifying the video data acquired by two adjacent wide-angle cameras in a numbering, sequencing and other modes, and taking the video data as target video data.

Video region data with repeated contents is searched for from two frames of target video data by means of SIFT (Scale Invariant Feature Transform) Feature matching, contour matching and the like, and the video region data is deleted from any target video data.

Note that, in order to maintain the resolution between the video data, the video area data is deleted once for the same frame of video data, for example, the video area data on the left side is deleted per frame of video data, or the video area data on the right side is deleted per frame of video data.

And a substep S34, generating an error prompt message if the target video data of two frames have a vertical misalignment.

And a substep S35, sending the error prompt message to the video network terminal.

If the target video data of two adjacent frames are detected to have dislocation in the vertical direction, the corresponding wide-angle camera is shown to have upper dislocation, at the moment, the video network terminal of the local end can generate error prompt information and send the error prompt information to the video network server, and the video network server sends the error prompt information to the video network terminal of the opposite end according to a downlink communication link configured for the video network terminal of the local end, so that a user is prompted to adjust the wide-angle camera. .

And step 504, synchronously outputting the multiple frames of video data subjected to the deduplication processing to a plurality of curved surface displays distributed in a surrounding manner for playing.

In the embodiment of the invention, the video network terminal at the home terminal is connected with a plurality of curved surface displays, namely, the display equipment with the panel having radian, so that the broad sense of the visual experience of a user can be improved, and the visual field of people is wider.

In a specific implementation, a user deploys a curved display, and a plurality of wide-angle cameras are distributed around the curved display, that is, a certain object is taken as a central point, and a plurality of wide-angle cameras are deployed around the object to form a curved or circular boundary.

And the quantity of the wide-angle cameras is equal to that of the curved surface displays, and the distribution directions are the same, so that the curved surface displays can play panoramic pictures collected by the wide-angle cameras.

In addition, the curvature of the curved display is close to the lens angle of the wide-angle camera so as to be close to the picture of the wide-angle camera.

In one example, as shown in fig. 6, 6 curved surface displays are deployed at the home end of video communication, and each curved surface display is deployed at an interval of 60 °, so that panoramic playing can be realized.

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

and a substep S41, for each frame of video data after the deduplication processing, querying a curved display corresponding to the video data.

And a substep S42, outputting the video data to the curved display for display.

In the embodiment of the invention, the incidence relation between the wide-angle camera and the curved-surface display can be preset, and the video data acquired by the wide-angle camera is sent to the corresponding curved-surface display to be played according to the incidence relation, so that the same acquisition and playing sequence is kept between the wide-angle camera and the curved-surface display, and the pictures between the curved-surface displays can be kept coherent.

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. 7, a block diagram of a playing apparatus for video data according to an embodiment of the present invention is shown, where the apparatus may be applied in a video network, and specifically includes the following modules:

the video stream receiving module 701 is configured to receive multiple paths of video streams sent by a video networking terminal and acquired by a plurality of circumferentially distributed wide-angle cameras;

a video data extraction module 702, configured to extract multiple frames of video data at the same time from the multiple video streams respectively;

a duplicate removal processing module 703, configured to perform duplicate removal processing on the multiple frames of video data;

and a synchronous playing module 704, configured to synchronously output the multiple frames of video data after the deduplication processing to multiple curved displays distributed in a surrounding manner for playing.

In one embodiment of the present invention, the video data extraction module 702 includes:

In one embodiment of the invention, the reference timestamp selection sub-module comprises:

In an embodiment of the present invention, the deduplication processing module 703 includes:

In an embodiment of the present invention, the deduplication processing module 703 further includes:

In an embodiment of the present invention, the synchronized playback module 704 includes:

In a specific implementation, the shooting ranges of every two adjacent wide-angle cameras are at least partially overlapped, and the number of the wide-angle cameras is equal to that of the curved-surface displays, and the distribution directions of the wide-angle cameras are the same.

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 present invention provides a method and a device for playing video data, which are introduced in detail above, and a specific example is applied in this document to illustrate the principle and implementation of the present invention, and the description of the above embodiment is only used to help understanding 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 method for playing video data, which is applied to video network, the method comprises:

carrying out duplicate removal processing on the multi-frame video data;

2. The method according to claim 1, wherein said extracting multiple frames of video data at the same time from the multiple video streams respectively comprises:

generating a time range using the reference timestamp;

3. The method according to claim 2, wherein said selecting a reference timestamp from a plurality of timestamps corresponding to the multi-frame video data comprises:

the most numerous timestamps are set as the reference timestamps.

4. The method according to claim 1, wherein said performing de-duplication processing on said multi-frame video data comprises:

deleting the video area data in any one of the target video data.

5. The method according to claim 4, wherein said de-duplicating the multi-frame video data further comprises:

and sending the error prompt information to the video networking terminal.

6. The method according to claim 1, wherein the outputting the multiple frames of video data after the deduplication processing to a plurality of curved displays distributed around the circumference synchronously for playing comprises:

and outputting the video data to the curved surface display for displaying.

7. The method of any one of claims 1-6, wherein the photographing ranges between each two adjacent wide-angle cameras are at least partially overlapped, and the wide-angle cameras and the curved displays are equal in number and same in distribution orientation.

8. A device for playing video data, wherein the device is applied in a video network, the device comprising:

9. The apparatus of claim 8, wherein the video data extraction module comprises:

10. The apparatus of claim 9, wherein the reference timestamp selection sub-module comprises: