CN115150639B - Weak network resisting method and device based on distributed encoder - Google Patents
Weak network resisting method and device based on distributed encoder Download PDFInfo
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- CN115150639B CN115150639B CN202211065648.8A CN202211065648A CN115150639B CN 115150639 B CN115150639 B CN 115150639B CN 202211065648 A CN202211065648 A CN 202211065648A CN 115150639 B CN115150639 B CN 115150639B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23605—Creation or processing of packetized elementary streams [PES]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4343—Extraction or processing of packetized elementary streams [PES]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The application provides a weak network resisting method and device based on a dispersive encoder, wherein the method comprises the following steps: acquiring a video stream, grouping the video stream according to a preset rule, and performing distributed coding according to the grouping; numbering each frame of video stream before the video stream is packetized, and encapsulating the numbering and frame video for streaming after the packetization is completed; and during decoding, a multi-channel decoder is adopted to decode the distributed codes, and the frame videos are merged and played based on the serial numbers. The method has extremely high tolerance to network delay through multi-path parallel coding, so that video blockage caused by network delay is effectively reduced.
Description
Technical Field
The invention relates to the field of video coding, in particular to a weak network resisting method based on a distributed encoder. The application also relates to a weak network resisting device based on the dispersive encoder.
Background
In the prior art, different types of data transmission are performed by using a Real-time Transport Protocol (RTP) based on a User Datagram Protocol (UDP), different data transmission channels need to be set, and a corresponding network connection needs to be established before each data transmission channel is set.
During the network interaction, the action of establishing the connection consumes a lot of resources, and requires additional communication resources, thereby causing a large delay.
In application scenarios such as cloud games and VR, the delay requirement is high, and the delay range is usually required to be 1 ms-100 ms, and the existing RTP-based data transmission technology cannot well meet the delay requirement in a weak network environment. Therefore, patent 2021107652576 describes a data transmission system with a multi-channel interactive protocol, which can effectively solve the above technical problems, but still has the problem of insufficient resistance of weak networks.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the present invention provides a weak network resisting method based on a distributed encoder.
The application provides a weak network resisting method based on a dispersive coder, which comprises the following steps:
acquiring a path of video stream, grouping the video stream according to a preset rule, and performing distributed coding according to the grouping;
numbering each frame of video stream before the video stream is packetized, and encapsulating the numbering and frame video for streaming after the packetization is completed;
and when decoding, decoding the distributed codes by adopting a multi-channel decoder, and merging and playing the frame videos based on the numbers.
Optionally, the preset rule includes a hash algorithm.
Optionally, the distributed encoding is performed by using multiple encoders, and each encoder is activated for each packet.
Optionally, the method further includes determining whether the codes are out of order, and if the out of order of the codes reaches a preset threshold, performing frame throwing.
Optionally, the frame video is a cloud game scene, and the preset threshold is 0.
The application also provides an anti weak net device based on dispersion encoder, includes:
the encoding module is used for acquiring a path of video stream, grouping the video stream according to a preset rule and performing dispersive encoding according to the grouping;
a transmission module, configured to number each frame of video stream before the video stream is packetized, and encapsulate the number and the frame video for streaming transmission after the packetization is completed;
and the decoding module is used for decoding the distributed codes by adopting a multi-channel decoder during decoding, and merging and playing the frame video based on the serial number.
Optionally, the preset rule includes a hash algorithm.
Optionally, the distributed encoding is performed by using multiple encoders, and each encoder is activated for each packet.
Optionally, the method further includes determining whether the codes are out of order, and if the out of order of the codes reaches a preset threshold, performing frame throwing.
Optionally, the frame video is a cloud game scene, and the preset threshold is 0.
The application has the advantages over the prior art that:
the application provides a weak network resisting method based on a dispersive coder, which comprises the following steps: acquiring a video stream, grouping the video stream according to a preset rule, and performing distributed coding according to the grouping; numbering each frame of video stream before the video stream is packetized, and packaging the numbering and the frame video for streaming after the packetization is finished; and during decoding, a multi-channel decoder is adopted to decode the distributed codes, and the frame videos are merged and played based on the serial numbers. The method has extremely high tolerance to network delay through multi-path parallel coding, so that video blockage caused by network delay is effectively reduced.
Drawings
Fig. 1 is a flow chart of the weak resistance network based on the distributed encoder in the invention.
Fig. 2 is a flow chart of processing a video in this application.
Fig. 3 is a schematic diagram of the weak network resisting device based on the distributed encoder in the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the predetermined objects, the following detailed description will be given with reference to the accompanying drawings and preferred embodiments of a data transmission system based on a multi-channel exchange protocol according to the present invention.
Before discussing exemplary embodiments in greater detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. A process may be terminated when its operations are completed, but may have additional steps not included in the figure. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.
The application provides a weak network resisting method based on a dispersive coder, which comprises the following steps: acquiring a video stream, grouping the video stream according to a preset rule, and performing distributed coding according to the grouping; numbering each frame of video stream before the video stream is packetized, and encapsulating the numbering and frame video for streaming after the packetization is completed; and when decoding, decoding the distributed codes by adopting a multi-channel decoder, and merging and playing the frame videos based on the numbers. The video coding method and the video coding device have extremely high tolerance to network delay through multi-channel parallel coding, and video blocking caused by network delay is effectively reduced.
FIG. 1 is a flow chart of the weak network based on the distributed encoder in the present invention;
referring to fig. 1, in S101, a video stream is obtained, the video stream is grouped according to a preset rule, and the video stream is subjected to distributed coding according to the grouping.
The method comprises the steps that one path of video is obtained and processed at a cloud end, the cloud end refers to a cloud server, a virtual machine for running a cloud game is arranged in the cloud server, and after the virtual machine is started and runs the game, at least one path of video is generated and transmitted to a client side to be displayed.
And before the video is transmitted to the client, the video is processed at the cloud, and the processing comprises grouping, packaging, sending and the like.
Fig. 2 is a flow chart of processing a video in this application.
Referring to fig. 2, S201 groups video frames.
Each link corresponds to one encoder, and video frames are grouped according to a hash algorithm.
Specifically, in the present application, the frames of the video are provided with numbers, or referred to as serial numbers. The calculation of the budget rules is grouped based on the numbers, the size of the groups is settable, and the person skilled in the art can set the grouping according to the actual situation. The preset rule is the hash algorithm.
S202 encodes the packet.
And after the processing of the packet is finished, encoding is carried out, wherein the encoding is carried out by adopting multi-path encoding, and each packet is encoded by an encoder.
And after the encoding is finished, packaging and sending the encoded packet.
Referring to fig. 1, S102 numbers each frame of video stream before the video stream is packetized, and encapsulates the numbers and frame video for streaming after the packetization is completed.
The frame numbers are used for sorting, namely video combination is carried out according to the frame numbers before video playing. Therefore, when the data of the video is transmitted, the information of the number needs to be transmitted together.
In the present application, the number and the code are encapsulated together and then transmitted.
Before transmission, the cloud server judges the current network fluctuation degree based on return data of data sent to the client, and selects the transmission line based on the fluctuation degree.
Specifically, the ratio of the transmission amount of the transmission line to the time is a transmission speed, the size of the transmission speed is determined, and then the line selection is performed according to the sequence of the transmission speeds.
The cloud server stores the transmission speed of each line, calculates the speed fluctuation of each line according to the stored transmission speed when the line selection is carried out, and sets a priority selection item according to the speed fluctuation.
Specifically, the calculation formula of the speed fluctuation is as follows:
a is a fluctuation value, P is an average difference before a preset time, QUOTE
Is the speed, and n is the number of speeds in the preset time. The smaller the A, the greater its priority.
In the actual transmission process, the non-specific codes can be transmitted through different lines, or can be combined through the same line, and video combination is performed at the client.
Preferably, the codes with different sizes are transmitted according to the transmission speed, and the codes with the same size are transmitted through a line with the speed and the fluctuation within a preset difference interval.
In this application, the packets of the distributed coding may have different sizes, or may have the same size, and are sorted according to the time sequence of the packets in the video. And then calculating the transmission speeds of different lines, and performing corresponding setting of the coded groups and the lines according to the transmission speeds and the time sequence.
Specifically, according to the transmission speed, an expected time when one code packet is transmitted to the client is calculated, and then the time is subjected to code packet sequencing, that is, the time sequencing corresponds to the code packet time sequence one to one. At this point, the transmission line for each code packet can be determined.
Referring to fig. 1, in decoding, in S103, a multi-channel decoder is used to decode the distributed codes, and merge and play the frame videos based on the numbers.
And after receiving the codes, the client starts a corresponding multi-channel decoder according to the coded data to decode, and then merges the frames according to the numbers to generate a video and play the video. In the case of a multi-channel encoder, since video frames are hashed and grouped and interleaved, when a frame loss occurs due to network congestion, the frame rate is lowered by performing the process according to the frame number within hundreds of milliseconds, because video frames of other groups are played normally. Therefore, the technical scheme of the application can reduce the pause by reducing the frame rate.
Further, whether the codes are out of order or not is judged, and if the out of order of the codes reaches a preset threshold value, frame throwing is executed. When the frame video is a cloud game scene, the preset threshold is 0.
The application also provides an anti weak net device based on dispersion encoder, includes: an encoding module 301, a transmission module 302, and a decoding module 303.
Fig. 3 is a schematic diagram of the weak network resisting device based on the distributed encoder in the invention.
Referring to fig. 3, the encoding module 301 is configured to obtain a path of video stream, group the video stream according to a preset rule, and perform distributed encoding according to the group.
The method comprises the steps that one path of video is obtained and processed at a cloud end, the cloud end refers to a cloud server, a virtual machine for running a cloud game is arranged in the cloud server, and after the virtual machine is started and runs the game, at least one path of video is generated and transmitted to a client side to be displayed.
And before the video is transmitted to the client, processing the video at the cloud, including grouping, packaging, sending and the like.
Each link corresponds to one encoder, and video frames are grouped according to a hash algorithm.
Specifically, in the present application, the frames of the video are provided with numbers, or referred to as serial numbers. The calculation of the budget rules is grouped based on the numbers, the size of the groups is settable, and the person skilled in the art can set the grouping according to the actual situation. The preset rule is the hash algorithm.
And after the processing of the packet is finished, encoding, wherein the encoding is carried out by adopting multi-path encoding, and each packet is encoded by an encoder.
And after the encoding is finished, packaging and sending the encoded packet.
Referring to fig. 3, a transmission module 302 is used for numbering each frame of video stream before the video stream is packetized, and encapsulating the numbering and frame video for streaming after the packetization is completed.
The frame numbers are used for sorting, namely video combination is carried out according to the frame numbers before video playing. Therefore, when the data of the video is transmitted, the information of the number needs to be transmitted together.
In the present application, the number and the code are encapsulated together and then transmitted.
Before transmission, the cloud server judges the current network fluctuation degree based on return data of data sent to the client, and selects the transmission line based on the fluctuation degree.
Specifically, the ratio of the transmission amount of the transmission line to the time is a transmission speed, the size of the transmission speed is determined, and then the line selection is performed according to the sequence of the transmission speeds.
The cloud server stores the transmission speed of each line, calculates the speed fluctuation of each line according to the stored transmission speed when the line selection is carried out, and sets a priority selection item according to the speed fluctuation.
Specifically, the calculation formula of the speed fluctuation is as follows:
a is a fluctuation value, P is an average difference before a preset time, QUOTE
Is the speed, and n is the number of the speeds in the preset time. The smaller the A, the greater its priority.
In the actual transmission process, the non-specific codes can be transmitted through different lines, or can be combined through the same line, and video combination is performed at the client.
Preferably, the codes with different sizes are transmitted according to the transmission speed, and the codes with the same size are transmitted through a line with the speed and the fluctuation within a preset difference interval.
In this application, each packet of the distributed coding may be of different size, or may be of the same size, and the packets are ordered according to their timing in the video. And then calculating the transmission speeds of different lines, and performing corresponding setting of the coded groups and the lines according to the transmission speeds and the time sequence.
Specifically, according to the transmission speed, an expected time when one code packet is transmitted to the client is calculated, and then the time is subjected to code packet sequencing, namely, the time sequencing is in one-to-one correspondence with the code packet time sequence. The transmission line for each code packet can be determined.
Referring to fig. 1, a decoding module 303 is configured to decode the distributed codes by using a multi-channel decoder during decoding, and merge and play the frame video based on the number.
And after receiving the codes, the client starts a corresponding multi-channel decoder according to the coded data to decode, and then merges the frames according to the numbers to generate a video and play the video. In the case of a multi-channel encoder, since video frames are subjected to hash grouping and are mutually interspersed, when a frame loss occurs due to network blocking, the frame rate is reduced within hundreds of milliseconds by performing the process according to the frame number, and the video frames of other groups can be normally played. Therefore, the technical scheme of the application can reduce the pause by reducing the frame rate.
Further, whether the codes are out of order or not is judged, and if the out of order of the codes reaches a preset threshold value, frame throwing is executed. When the frame video is a cloud game scene, the preset threshold is 0.
While embodiments of the present invention have been shown and described in the foregoing disclosure of the application, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A weak network resisting method based on a dispersion encoder is characterized by comprising the following steps:
acquiring a video stream, grouping the video stream according to a preset rule, and performing distributed coding according to the grouping; each link corresponds to one encoder, video streams are grouped according to a Hash algorithm, and the preset rule comprises the Hash algorithm;
numbering each frame of video stream before the video stream is packetized, and packaging the numbering and the frame video for streaming after the packetization is finished; the numbers are used for sorting, are packaged with codes and then are transmitted, whether the codes are out of order or not is judged, and if the out of order of the codes reaches a preset threshold value, frame throwing is executed; the packets of the distributed coding are sequenced according to the time sequence of the packets in the video, then the transmission speeds of different lines are calculated, and the packets and the lines which are coded according to the transmission speeds and the time sequence are correspondingly arranged; when the line selection is carried out, calculating the speed fluctuation of each line according to the transmission speed stored by the cloud server, and setting a priority selection item according to the speed fluctuation;
specifically, the calculation formula of the speed fluctuation is as follows:
a is a speed fluctuation value, P is an average difference before a preset time, and
is the speed, n is a presetThe number of speeds in time;
calculating the predicted time of transmitting a code packet to a client according to the transmission speed, then sequencing the code packets at the predicted time, and carrying out one-to-one correspondence between the sequencing of the predicted time and the time sequence of the code packet to determine a transmission line of each code packet;
and during decoding, a multi-channel decoder is adopted to decode the distributed codes, and the frame videos are merged and played based on the serial numbers.
2. The distributed encoder based weak network resisting method as claimed in claim 1, wherein the distributed encoding is performed by using a plurality of encoders, and one encoder is respectively activated for each packet.
3. The distributed encoder based weak network resisting method according to claim 1, wherein the frame video is a cloud game scene, and the preset threshold is 0.
4. A weak network resisting device based on a dispersive coder is characterized by comprising:
the encoding module is used for acquiring a path of video stream, grouping the video stream according to a preset rule and performing distributed encoding according to the grouping; each link corresponds to one encoder, video streams are grouped according to a Hash algorithm, and the preset rule comprises the Hash algorithm;
a transmission module, configured to number each frame of video stream before the video stream is packetized, and encapsulate the number and the frame video for streaming transmission after the packetization is completed; the numbers are used for sorting, are packaged with codes and then are transmitted, whether the codes are out of order or not is judged, and if the out of order of the codes reaches a preset threshold value, frame throwing is executed; the packets of the distributed coding are sequenced according to the time sequence of the packets in the video, then the transmission speeds of different lines are calculated, and the packets and the lines which are coded according to the transmission speeds and the time sequence are correspondingly arranged; when the line selection is carried out, calculating the speed fluctuation of each line according to the transmission speed stored by the cloud server, and setting a priority selection item according to the speed fluctuation;
specifically, the calculation formula of the speed fluctuation is as follows:
a is the speed fluctuation value, P is the average difference before the preset time
Is the speed, and n is the number of the speeds in the preset time;
calculating the predicted time of transmitting a code packet to a client according to the transmission speed, then sequencing the code packets at the predicted time, and carrying out one-to-one correspondence between the sequencing of the predicted time and the time sequence of the code packet to determine a transmission line of each code packet;
and the decoding module is used for decoding the distributed codes by adopting a multi-channel decoder during decoding, and merging and playing the frame video based on the serial number.
5. The distributed encoder based weak network resisting device according to claim 4, wherein the distributed encoding is performed by using a plurality of encoders, and one encoder is respectively started for each packet.
6. The distributed encoder based anti-Weak Net device according to claim 4, wherein said frame video is a cloud game scene, and said preset threshold is 0.
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