CN113709525A - Multi-element communication method and communication system - Google Patents
Multi-element communication method and communication system Download PDFInfo
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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
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1485—Servers; Data center rooms, e.g. 19-inch computer racks
- H05K7/1488—Cabinets therefor, e.g. chassis or racks or mechanical interfaces between blades and support structures
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20718—Forced ventilation of a gaseous coolant
Abstract
The invention discloses a multivariate communication method and a communication system, which can respectively modulate and encode video data to be transmitted in each path; performing channel coding on a plurality of data packets in each video frame in each path, and performing serial-to-parallel conversion on the data packets subjected to channel coding; respectively carrying out data coding on the obtained multiple groups of parallel data symbols; overlapping and sending the data symbols after data coding; receiving and decoding each path of data symbols to obtain each path of decoded video data packet; detecting and processing a video data packet, and outputting video frames according to a time sequence; the communication data processing method and the communication data processing equipment have the advantages of high transmission efficiency and stable transmission, can perform retransmission completion on packet loss data, enable the transmitted video to be complete and avoid the phenomenon of video pause and jump.
Description
Technical Field
The invention relates to the field of communication, in particular to a multivariate communication method and a multivariate communication system.
Background
Data communication is a new way of communication that results from the combination of communication technology and computer technology. A transmission channel is necessary for transmitting information between two locations, and there are a distinction between wired data communication and wireless data communication depending on a transmission medium. They all connect data terminals with computers through transmission channels, so that the data terminals at different places can share software, hardware and information resources.
Now along with monitored control system's development, the surveillance video is more and more clear, and surveillance camera head quantity is more and more, leads to present video data when transmitting, has the way number many, and the problem that the data volume is big leads to data transmission efficiency not high, and data transmission stability can not have the packet loss problem to take place, leads to the display frame to appear blocking or jump, can not satisfy present operation requirement.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a multivariate communication method, comprising the steps of:
s1: respectively modulating and coding the video data to be transmitted in each path, modulating and coding each frame of video data into a plurality of data packets, wherein each data packet forming each frame of video data has the same timestamp;
s2: performing channel coding on a plurality of data packets in each video frame in each path to obtain data packets subjected to channel coding, and performing serial-to-parallel conversion on the data packets subjected to channel coding to obtain a plurality of groups of parallel data symbols;
s3: respectively carrying out data coding on the obtained multiple groups of parallel data symbols;
s4: overlapping and sending the data symbols after data coding;
s5: receiving each path of data symbols, and decoding a plurality of groups of data symbols in each path to obtain each path of decoded video data packet;
s6: detecting and processing video data packets, merging the video data packets with the same timestamp into a video frame, completing the video frame data packet with packet loss, completing the video frame, and outputting the video frame according to a time sequence;
s7: the video frames are displayed in chronological order.
Preferably: steps S1 to S4 are performed at the video data transmitting side, and steps S5 to S7 are performed at the video data receiving side.
Preferably: in step S5, each path of data symbols is received, and each data symbol in each path of data is subjected to data decoding to obtain a set number of parallel data symbols, the parallel data symbols are subjected to parallel-to-serial conversion to obtain a data packet after data decoding, and the data packet after data decoding is subjected to channel decoding to obtain a decoded video data packet for each path.
Preferably: in steps S5 and S6, a GStreamer process is first created, and a plurality of pipes are constructed in the GStreamer process to acquire, decode, and process a plurality of paths of video data packets, where each pipe corresponds to one path of video data packet, and each pipe includes a decoding module and a processing module;
the decoding module receives data of a corresponding path, acquires a video data packet in the path, and decodes the video data packet to obtain a decoded video data packet;
the processing module detects and processes the decoded video data packets, combines the video data packets with the same timestamp into a video frame, completes the packet of the lost video frame data, completes the video frame, and outputs the video frame according to the time sequence.
Preferably: the decoding module decodes the video data packet of the corresponding path, and the decoding module comprises the following steps: firstly, data decoding is carried out on received data of a corresponding path and each data symbol to obtain parallel data symbols with a set number, parallel-serial conversion is carried out on the parallel data symbols to obtain a data packet after data decoding, and channel decoding is carried out on the data packet after data decoding to obtain a decoded video data packet.
Preferably: the detection and processing of the decoded video data packet by the processing module comprises the following steps:
s21: receiving a video data packet of each video frame forming the video data after decoding, and extracting a time stamp of each video frame;
s22: detecting each video frame according to the time sequence, judging whether each video frame has a packet loss condition, if not, executing step S23, and if so, executing step S24;
s23: merging all video data packets with the same timestamp into a video frame;
s24: judging the lost video frame, sending a retransmission instruction to a video data sending end according to a judgment result, and retransmitting the data packet of the video frame by the video data sending end;
s25: receiving the retransmission data, decoding the retransmission data by the decoding module, and then performing step S21;
s26: arranging and outputting the video frames according to the time sequence;
a multiple element communication system comprising:
the video data caching module is used for storing video data for monitoring and shooting;
the video data transmitting terminal is used for modulating and coding data to be transmitted in each path, carrying out channel coding on each data packet after modulation coding in each path, carrying out serial-to-parallel conversion operation on the data packets after channel coding, respectively carrying out data coding on multiple paths of parallel data symbols acquired in each path, and overlapping and transmitting the data symbols after data coding;
and the video data receiving end is used for receiving, acquiring, decoding and processing the plurality of paths of video data packets, decoding the video data packets, detecting and processing the decoded video data packets, and finally outputting video frames according to a time sequence.
Preferably: the video data sending end comprises a modulation coding module, a channel coding module, a serial-parallel conversion module, a data coding module and a sending module;
the modulation coding module is used for respectively modulating and coding the video data to be transmitted in each path, and modulating and coding each frame of video data into a plurality of data packets;
the channel coding module is used for carrying out channel coding on a plurality of data packets in each video frame in each path to obtain data packets after the channel coding;
the serial-parallel conversion module is used for carrying out serial-parallel conversion operation on the data packet after channel coding to obtain a plurality of groups of parallel data symbols;
the data coding module is used for respectively carrying out data coding on the acquired parallel data symbols;
and the sending module is used for overlapping and sending the data symbols after the data coding.
Preferably: the video data receiving end comprises:
the device comprises a creating module, a decoding module and a processing module, wherein the creating module is used for creating a GStreamer process, and constructing a plurality of pipelines in the GStreamer process to acquire, decode and process a plurality of paths of video data packets, each pipeline corresponds to one path of video data packet, and each pipeline comprises the decoding module and the processing module;
the decoding module receives data of a corresponding path, acquires a video data packet in the path, and decodes the video data packet to obtain a decoded video data packet;
the processing module detects and processes the decoded video data packets, combines the video data packets with the same timestamp into a video frame, completes the packet of the lost video frame data, completes the video frame, and outputs video frame results according to the time sequence.
Preferably: the decoding module comprises a data decoding module, a parallel-serial conversion module and a channel decoding module;
the data decoding module is used for carrying out data decoding on each data symbol in the received data to obtain a set number of parallel data symbols;
the parallel-serial conversion module is used for performing parallel-serial conversion on the parallel data symbols to obtain a data packet after data decoding;
and the channel decoding module is used for carrying out channel decoding on the data packet after the data decoding.
The utility model provides a cabinet is placed to many first communication system with server, including the confined cabinet body, cabinet body front end is equipped with sealed glass door, the mounting groove that is used for installing the server has been arranged to the cabinet body, equidistance interval distribution about the mounting groove, contact heat absorption mechanism has been arranged between the adjacent mounting groove, contact heat absorption mechanism connects total heat dissipation mechanism, total heat dissipation mechanism arranges at cabinet body top, contact heat absorption mechanism connects A adjustment mechanism and B adjustment mechanism, A adjustment mechanism is used for adjusting the size and the position of contact heat absorption mechanism, B adjustment mechanism is used for adjusting contact heat absorption mechanism and server shell contact or break away from.
The contact type heat absorption mechanism comprises an air bag, heat absorption point assemblies are arranged on the upper side and the lower side of the air bag, the heat absorption point assemblies are distributed on the upper surface and the lower surface of the air bag in an array mode, the front end and the rear end of the air bag are connected with an A adjusting mechanism, the A adjusting mechanism is used for adjusting the distance between the front end and the rear end of the air bag and adjusting the movement of the air bag along the depth direction of the cabinet body, the air bag is connected with a B adjusting mechanism, and the B adjusting mechanism is used for inflating or inhaling air into the air bag.
The heat absorption point component comprises plate-shaped heat absorption blocks, the heat absorption blocks are metal components, cavities are arranged in the heat absorption blocks, water inlet connectors and water outlet connectors are arranged on the heat absorption blocks, the water inlet connectors and the water outlet connectors are communicated with the cavities, the water inlet connectors and the water outlet connectors between the adjacent heat absorption blocks are connected through elastic telescopic pipes, the heat absorption blocks are connected in series through the elastic telescopic pipes, the contact type heat absorption mechanism further comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is used for supplying water to the heat absorption blocks, the water outlet pipe is used for receiving hot water discharged by the heat absorption blocks, the water inlet pipe and the water outlet pipe are connected with a total heat dissipation mechanism, the total heat dissipation mechanism is used for cooling the water, and the total heat dissipation mechanism forms a circulation loop through the water inlet pipe, the water outlet pipe and the heat absorption point component.
The A adjusting mechanism comprises two lead screw nut mechanisms which are respectively arranged above and below the air bag, the lead screw nut mechanisms are arranged along the depth direction of the cabinet body, nuts in the two lead screw nut mechanisms are fixedly connected with a movable cross rod, the movable cross rod is horizontally arranged, the rod length direction of the movable cross rod is consistent with the width direction of the cabinet body, and the front end and the rear end of the air bag are fixedly arranged on the movable cross rod.
The B adjusting mechanism comprises an air pipe, the air pipe is communicated with the air bag, the air pipe is connected with an air pump mechanism, and the air pump mechanism is used for inflating or inhaling the air bag.
The invention has the technical effects and advantages that: the communication method provided by the invention can realize that the video data shot by each monitoring device is firstly modulated and coded, and each frame of video data is modulated and coded into a plurality of data packets, thereby facilitating the subsequent processing;
then, channel coding is carried out on a plurality of data packets in each video frame in each path; because interference and fading exist in the communication process and errors occur in the signal transmission process, the signals in the transmission process can be corrected and detected by adopting channel coding and processing, so that the capability of resisting various interferences when data are transmitted in a channel is enhanced, and the reliability of the system is improved;
then, the data packet after channel coding is subjected to serial-parallel conversion operation, so that the data transmission period is shortened, and the data transmission efficiency is improved;
then, data coding is carried out on the multiple groups of acquired parallel data symbols respectively, and the data symbols after data coding are overlapped and sent, so that the transmission efficiency of data is further improved;
then receiving and decoding each path of data symbols, finally obtaining each video frame data, and displaying the video;
the communication system provided by the invention has high transmission efficiency and stable transmission, can perform retransmission completion on packet loss data, enables the transmitted video to be complete and avoids the phenomenon of video blocking and jumping;
the server placing cabinet provided by the invention can be suitable for different server placing and heat dissipation requirements, the heat absorption position can be adjusted according to different servers and different heat dissipation positions of the servers, the array type heat absorption point assemblies are adopted, the heating positions of the servers can be covered, the attaching effect is good, the heat absorption effect is good, the servers can be effectively dissipated, and the current use requirements are met.
Drawings
Fig. 1 is a schematic flow chart of a multi-element communication method according to the present invention.
Fig. 2 is a schematic flow chart illustrating a process of detecting and processing a decoded video data packet by a processing module in a multi-element communication method according to the present invention.
Fig. 3 is a block diagram of a multi-element communication system according to the present invention.
Fig. 4 is a block diagram of a video data transmitting end in a multi-element communication system according to the present invention.
Fig. 5 is a block diagram of a video data receiving end in a multi-element communication system according to the present invention.
Fig. 6 is a block diagram of a decoding module in a multi-element communication system according to the present invention.
Fig. 7 is a schematic structural diagram of a server cabinet for a multi-element communication system according to the present invention.
Fig. 8 is a schematic half-sectional view of a contact type heat absorption mechanism in a server cabinet for a multi-element communication system according to the present invention.
Fig. 9 is a schematic structural diagram of a heat sink assembly in an air bag of a server cabinet for a multi-element communication system according to the present invention.
In the figure: 100. a cabinet body; 110. mounting grooves; 120. sealing the glass door; 200. a contact heat absorption mechanism; 210. an air bag; 220. a heat absorbing block; 230. an elastic telescopic pipe; 240. a water inlet pipe; 250. a water outlet pipe 300 and a total heat dissipation mechanism; 400. a, adjusting a mechanism; 410. moving the cross bar; 500. b, a regulating mechanism; 510. the trachea.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1
Referring to fig. 1, in the present embodiment, a multivariate communication method is provided, including the following steps:
s1: respectively modulating and coding the video data to be transmitted in each path, modulating and coding each frame of video data into a plurality of data packets, wherein each data packet forming each frame of video data has the same timestamp;
s2: performing channel coding on a plurality of data packets in each video frame in each path to obtain data packets subjected to channel coding, and performing serial-to-parallel conversion on the data packets subjected to channel coding to obtain a plurality of groups of parallel data symbols;
s3: respectively carrying out data coding on the obtained multiple groups of parallel data symbols;
s4: overlapping and sending the data symbols after data coding;
s5: receiving each path of data symbols, and decoding a plurality of groups of data symbols in each path to obtain each path of decoded video data packet;
s6: detecting and processing video data packets, merging the video data packets with the same timestamp into a video frame, completing the video frame data packet with packet loss, completing the video frame, and outputting the video frame according to a time sequence;
s7: the video frames are displayed in chronological order.
In step S2, data symbols are sequentially selected from the channel-coded packet by a predetermined number, and the selected data symbols are subjected to serial-to-parallel conversion.
In step S4, after the data symbols are superimposed, one data symbol obtained after each superimposition is made into a serial data symbol before transmission.
Steps S1 to S4 are performed at the video data transmitting side, and steps S5 to S7 are performed at the video data receiving side.
In step S5, each path of data symbols is received, and each data symbol in each path of data is subjected to data decoding to obtain a set number of parallel data symbols, the parallel data symbols are subjected to parallel-to-serial conversion to obtain a data packet after data decoding, and the data packet after data decoding is subjected to channel decoding to obtain a decoded video data packet for each path.
In steps S5 and S6, a GStreamer process is first created, and a plurality of pipes are constructed in the GStreamer process to acquire, decode, and process a plurality of paths of video data packets, where each pipe corresponds to one path of video data packet, and each pipe includes a decoding module and a processing module;
the decoding module receives data of a corresponding path, acquires a video data packet in the path, and decodes the video data packet to obtain a decoded video data packet;
the processing module detects and processes the decoded video data packets, combines the video data packets with the same timestamp into a video frame, completes the packet of the lost video frame data, completes the video frame, and outputs the video frame according to the time sequence.
The decoding module decodes the video data packet of the corresponding path, and the decoding module comprises the following steps: firstly, data decoding is carried out on received data of a corresponding path and each data symbol to obtain parallel data symbols with a set number, parallel-serial conversion is carried out on the parallel data symbols to obtain a data packet after data decoding, and channel decoding is carried out on the data packet after data decoding to obtain a decoded video data packet.
Referring to fig. 1, the detection and processing of the decoded video data packet by the processing module includes the following steps:
s21: receiving a video data packet of each video frame forming the video data after decoding, and extracting a time stamp of each video frame;
s22: detecting each video frame according to the time sequence, judging whether each video frame has a packet loss condition, if not, executing step S23, and if so, executing step S24;
s23: merging all video data packets with the same timestamp into a video frame;
s24: judging the lost video frame, sending a retransmission instruction to a video data sending end according to a judgment result, and retransmitting the data packet of the video frame by the video data sending end;
s25: receiving the retransmission data, decoding the retransmission data by the decoding module, and then performing step S21;
s26: arranging and outputting the video frames according to the time sequence;
in step S24, the time stamp of the lost video frame is determined, and a retransmission instruction is sent to the video data sending end according to the time stamp, and the video data sending end retransmits the data corresponding to the video stamp.
Example 2
Referring to fig. 3, in the present embodiment, a multiple communication system is proposed, including:
the video data caching module is used for storing video data for monitoring and shooting;
the video data transmitting terminal is used for modulating and coding data to be transmitted in each path, carrying out channel coding on each data packet after modulation coding in each path, carrying out serial-to-parallel conversion operation on the data packets after channel coding, respectively carrying out data coding on multiple paths of parallel data symbols acquired in each path, and overlapping and transmitting the data symbols after data coding;
and the video data receiving end is used for receiving, acquiring, decoding and processing the plurality of paths of video data packets, decoding the video data packets, detecting and processing the decoded video data packets, and finally outputting video frames according to a time sequence.
Referring to fig. 4, the video data transmitting end includes a modulation coding module, a channel coding module, a serial-to-parallel conversion module, a data coding module, and a transmitting module;
the modulation coding module is used for respectively modulating and coding the video data to be transmitted in each path, and modulating and coding each frame of video data into a plurality of data packets;
the channel coding module is used for carrying out channel coding on a plurality of data packets in each video frame in each path to obtain data packets after the channel coding;
the serial-parallel conversion module is used for carrying out serial-parallel conversion operation on the data packet after channel coding to obtain a plurality of groups of parallel data symbols;
the data coding module is used for respectively carrying out data coding on the acquired parallel data symbols;
and the sending module is used for overlapping and sending the data symbols after the data coding.
Referring to fig. 5, the video data receiving end includes:
the device comprises a creating module, a decoding module and a processing module, wherein the creating module is used for creating a GStreamer process, and constructing a plurality of pipelines in the GStreamer process to acquire, decode and process a plurality of paths of video data packets, each pipeline corresponds to one path of video data packet, and each pipeline comprises the decoding module and the processing module;
the decoding module receives data of a corresponding path, acquires a video data packet in the path, and decodes the video data packet to obtain a decoded video data packet;
the processing module detects and processes the decoded video data packets, combines the video data packets with the same timestamp into a video frame, completes the packet of the lost video frame data, completes the video frame, and outputs video frame results according to the time sequence.
Referring to fig. 6, the decoding module includes a data decoding module, a parallel-to-serial conversion module, and a channel decoding module;
the data decoding module is used for carrying out data decoding on each data symbol in the received data to obtain a set number of parallel data symbols;
the parallel-serial conversion module is used for performing parallel-serial conversion on the parallel data symbols to obtain a data packet after data decoding;
and the channel decoding module is used for carrying out channel decoding on the data packet after the data decoding.
The communication data processing method provided by the invention can realize that the video data shot by each monitoring device is firstly modulated and coded, and each frame of video data is modulated and coded into a plurality of data packets, thereby facilitating the subsequent processing;
then, channel coding is carried out on a plurality of data packets in each video frame in each path; because interference and fading exist in the communication process and errors occur in the signal transmission process, the signals in the transmission process can be corrected and detected by adopting channel coding and processing, so that the capability of resisting various interferences when data are transmitted in a channel is enhanced, and the reliability of the system is improved;
then, the data packet after channel coding is subjected to serial-parallel conversion operation, so that the data transmission period is shortened, and the data transmission efficiency is improved;
then, data coding is carried out on the multiple groups of acquired parallel data symbols respectively, and the data symbols after data coding are overlapped and sent, so that the transmission efficiency of data is further improved;
then receiving and decoding each path of data symbols, finally obtaining each video frame data, and displaying the video;
the communication data processing method and the communication data processing equipment have the advantages of high transmission efficiency and stable transmission, and can perform retransmission completion on lost data, so that the transmitted video is complete, and the phenomenon of video pause and jump is avoided.
Example 3
Referring to fig. 7 to 9, in the present embodiment, a server placement cabinet for a multi-element communication system is provided, including a closed cabinet 100, a sealed glass door 120 is installed at a front end of the cabinet 100, mounting grooves 110 for installing servers are arranged on the cabinet 100, the mounting grooves 110 are distributed at equal intervals from top to bottom, contact heat absorption mechanisms 200 are arranged between adjacent mounting grooves 110, the contact heat absorption mechanisms 200 are connected to a total heat dissipation mechanism 300, the total heat dissipation mechanism 300 is arranged at a top of the cabinet 100, the contact heat absorption mechanisms 200 are connected to an a adjustment mechanism 400 and a B adjustment mechanism 500, the a adjustment mechanism 400 is used for adjusting the size and the position of the contact heat absorption mechanisms 200, and the B adjustment mechanism 500 is used for adjusting the contact or the separation of the contact heat absorption mechanisms 200 and the server housing.
The contact type heat absorption mechanism 200 comprises an air bag 210, heat absorption point components are arranged on the upper side and the lower side of the air bag 210, the heat absorption point components are distributed on the upper surface and the lower surface of the air bag 210 in an array mode, the front end and the rear end of the air bag 210 are connected with an A adjusting mechanism 400, the A adjusting mechanism 400 is used for adjusting the distance between the front end and the rear end of the air bag and adjusting the movement of the air bag along the depth direction of the cabinet body 100, the air bag 210 is connected with a B adjusting mechanism 500, and the B adjusting mechanism 500 is used for inflating or inhaling air into the air bag 210.
The heat absorption point assembly comprises plate-shaped heat absorption blocks 220, the heat absorption blocks 220 are metal members, cavities are arranged in the heat absorption blocks 220, water inlet joints and water outlet joints are arranged on the heat absorption blocks 220 and are communicated with the cavities, the water inlet joints and the water outlet joints between the adjacent heat absorption blocks 220 are connected through elastic telescopic pipes 230, the heat absorption blocks 220 are connected in series through the elastic telescopic pipes 230, the contact type heat absorption mechanism 200 further comprises a water inlet pipe 240 and a water outlet pipe 250, the water inlet pipe 240 is used for supplying water to the heat absorption blocks 220, the water outlet pipe 250 is used for receiving hot water exhausted by the heat absorption blocks 220, the water inlet pipe 240 and the water outlet pipe 250 are connected with a total heat dissipation mechanism 300, the total heat dissipation mechanism 300 is used for cooling the water, and the total heat dissipation mechanism 300 forms a circulation loop through the water inlet pipe 240, the water outlet pipe 250 and the heat absorption point assembly.
The a adjusting mechanism 400 includes two lead screw nut mechanisms, the two lead screw nut mechanisms are respectively arranged above and below the air bag 210, the lead screw nut mechanisms are arranged along the depth direction of the cabinet body 100, nuts in the two lead screw nut mechanisms are both fixedly connected with the movable cross bar 410, the movable cross bar 410 is horizontally arranged, the length direction of the movable cross bar 410 is consistent with the width direction of the cabinet body 100, and the front end and the rear end of the air bag 210 are fixedly mounted on the movable cross bar 410.
The B adjusting mechanism 500 comprises an air tube 510, the air tube 510 is communicated with the air bag 210, the air tube 510 is connected with an air pump mechanism, and the air pump mechanism is used for inflating or inhaling the air bag 210.
When the server placement cabinet provided by the embodiment is used, firstly, a server is installed in the installation groove 110, then, according to the type of the server, a heating part of the server is determined, the two nut screw mechanisms move, the air bag is adjusted to move above or below the heating part, then, the distance between the two movable cross rods 410 is adjusted, so that the air bag 210 can cover the heating part, then, the air bag 210 is inflated, the air bag expands, the heat absorption block 220 ascends or descends to be attached to the heating part of the server, then, circulating water in the heat dissipation mechanism 300 is totally circulated, and when the water passes through a cavity in the heat absorption block 220, the heat absorbed by the heat absorption block is taken away, so that the purpose of dissipating heat of the heating part of the server is achieved.
The server placing cabinet provided by the invention can be suitable for different server placing and heat dissipation requirements, the heat absorption position can be adjusted according to different servers and different heat dissipation positions of the servers, the heat absorption position of the servers can be covered by adopting the array type heat absorption point assemblies, a plurality of service shells are not flat, a plurality of service shells are provided with grooves or bulges, the traditional fixed radiators cannot be completely attached, and local heat dissipation is uneven.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (10)
1. A method of multiple communication, comprising the steps of:
s1: respectively modulating and coding the video data to be transmitted in each path, modulating and coding each frame of video data into a plurality of data packets, wherein each data packet forming each frame of video data has the same timestamp;
s2: performing channel coding on a plurality of data packets in each video frame in each path to obtain data packets subjected to channel coding, and performing serial-to-parallel conversion on the data packets subjected to channel coding to obtain a plurality of groups of parallel data symbols;
s3: respectively carrying out data coding on the obtained multiple groups of parallel data symbols;
s4: overlapping and sending the data symbols after data coding;
s5: receiving each path of data symbols, and decoding a plurality of groups of data symbols in each path to obtain each path of decoded video data packet;
s6: detecting and processing video data packets, merging the video data packets with the same timestamp into a video frame, completing the video frame data packet with packet loss, completing the video frame, and outputting the video frame according to a time sequence;
s7: the video frames are displayed in chronological order.
2. The multiplex communication method of claim 1, wherein steps S1-S4 are performed at a video data transmitting end, and steps S5-S7 are performed at a video data receiving end.
3. The method according to claim 2, wherein in step S5, each path of data symbols is received, and each data symbol in each path of data is subjected to data decoding to obtain a set number of parallel data symbols, parallel-to-serial conversion is performed on the parallel data symbols to obtain a data packet after data decoding, and channel decoding is performed on the data packet after data decoding to obtain a decoded video data packet for each path.
4. The method of claim 3, wherein in steps S5 and S6, a GStreamer process is first created, and a plurality of pipes are constructed in the GStreamer process to obtain, decode and process a plurality of video data packets, each pipe corresponding to one video data packet, each pipe comprising a decoding module and a processing module;
the decoding module receives data of a corresponding path, acquires a video data packet in the path, and decodes the video data packet to obtain a decoded video data packet;
the processing module detects and processes the decoded video data packets, combines the video data packets with the same timestamp into a video frame, completes the packet of the lost video frame data, completes the video frame, and outputs the video frame according to the time sequence.
5. The multiplex communication method as claimed in claim 4, wherein the step of decoding the video data packet of the corresponding path by the decoding module is: firstly, data decoding is carried out on received data of a corresponding path and each data symbol to obtain parallel data symbols with a set number, parallel-serial conversion is carried out on the parallel data symbols to obtain a data packet after data decoding, and channel decoding is carried out on the data packet after data decoding to obtain a decoded video data packet.
6. The multiplex communication method of claim 5 wherein the step of detecting processing of the decoded video data packets by the processing module comprises the steps of:
s21: receiving a video data packet of each video frame forming the video data after decoding, and extracting a time stamp of each video frame;
s22: detecting each video frame according to the time sequence, judging whether each video frame has a packet loss condition, if not, executing step S23, and if so, executing step S24;
s23: merging all video data packets with the same timestamp into a video frame;
s24: judging the lost video frame, sending a retransmission instruction to a video data sending end according to a judgment result, and retransmitting the data packet of the video frame by the video data sending end;
s25: receiving the retransmission data, decoding the retransmission data by the decoding module, and then performing step S21;
s26: the video frames are arranged and output in chronological order.
7. A multiple-element communication system, comprising:
the video data caching module is used for storing video data for monitoring and shooting;
the video data transmitting terminal is used for modulating and coding data to be transmitted in each path, carrying out channel coding on each data packet after modulation coding in each path, carrying out serial-to-parallel conversion operation on the data packets after channel coding, respectively carrying out data coding on multiple paths of parallel data symbols acquired in each path, and overlapping and transmitting the data symbols after data coding;
and the video data receiving end is used for receiving, acquiring, decoding and processing the plurality of paths of video data packets, decoding the video data packets, detecting and processing the decoded video data packets, and finally outputting video frames according to a time sequence.
8. The multivariate communication system according to claim 7, wherein the video data transmitting end comprises a modulation coding module, a channel coding module, a serial-to-parallel conversion module, a data coding module and a transmitting module;
the modulation coding module is used for respectively modulating and coding the video data to be transmitted in each path, and modulating and coding each frame of video data into a plurality of data packets;
the channel coding module is used for carrying out channel coding on a plurality of data packets in each video frame in each path to obtain data packets after the channel coding;
the serial-parallel conversion module is used for carrying out serial-parallel conversion operation on the data packet after channel coding to obtain a plurality of groups of parallel data symbols;
the data coding module is used for respectively carrying out data coding on the acquired parallel data symbols;
and the sending module is used for overlapping and sending the data symbols after the data coding.
9. The multiplex communication system as claimed in claim 8, wherein said video data receiving end comprises:
the device comprises a creating module, a decoding module and a processing module, wherein the creating module is used for creating a GStreamer process, and constructing a plurality of pipelines in the GStreamer process to acquire, decode and process a plurality of paths of video data packets, each pipeline corresponds to one path of video data packet, and each pipeline comprises the decoding module and the processing module;
the decoding module receives data of a corresponding path, acquires a video data packet in the path, and decodes the video data packet to obtain a decoded video data packet;
the processing module detects and processes the decoded video data packets, combines the video data packets with the same timestamp into a video frame, completes the packet of the lost video frame data, completes the video frame, and outputs video frame results according to the time sequence.
10. The multivariate communication system of claim 9, wherein the decoding module comprises a data decoding module, a parallel-to-serial conversion module and a channel decoding module;
the data decoding module is used for carrying out data decoding on each data symbol in the received data to obtain a set number of parallel data symbols;
the parallel-serial conversion module is used for performing parallel-serial conversion on the parallel data symbols to obtain a data packet after data decoding;
and the channel decoding module is used for carrying out channel decoding on the data packet after the data decoding.
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