CN108882021A - A kind of video broadcasting method and device - Google Patents
A kind of video broadcasting method and device Download PDFInfo
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- CN108882021A CN108882021A CN201710984816.6A CN201710984816A CN108882021A CN 108882021 A CN108882021 A CN 108882021A CN 201710984816 A CN201710984816 A CN 201710984816A CN 108882021 A CN108882021 A CN 108882021A
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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
-
- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
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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
- H04N21/4347—Demultiplexing of several video streams
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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
-
- 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
- H04N21/440263—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 altering the spatial resolution, e.g. for displaying on a connected PDA
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
- H04N21/8193—Monomedia components thereof involving executable data, e.g. software dedicated tools, e.g. video decoder software or IPMP tool
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
Abstract
The embodiment of the invention provides a kind of video broadcasting method and devices, and view networked server, the first view networked terminals and multiple second view networked terminals are deployed in depending on networking, the method includes：First view networked terminals receive the multi-path video data of second view networked terminals acquisitions that view networked server is sent according to the downstream communications link to the first view networked terminals, multiple；First is decoded processing to the multi-path video data respectively depending on networked terminals；First view networked terminals carry out compression processing to the multi-path video data after decoding respectively；Multi-path video data after compression processing is exported to connected equipment depending on networked terminals and is played out by first.The resolution ratio of every frame video data is reduced, to compress the size of every frame video data, reduces the data volume of processing, reduces the occupancy of the first view networked terminals CPU.
Description
Technical field
The present invention relates to view networking technology fields, fill more particularly to a kind of video broadcasting method and a kind of video playing
It sets.
Background technique
With the fast development of the network technology, the video communications such as video conference, video teaching the life of user, work,
Study etc. is widely available.
In the scenes such as video conference, video communication is usually carried out in many ways, wherein a side, which starts thread, receives its other party
Video data, video data is decoded, decoding after play back again, since the resolution ratio of video data is higher, body
Product is larger, and therefore, the data volume of processing is larger, leads to CPU (Central Processing Unit, the central processing of terminal
Device) occupancy it is higher.
Summary of the invention
In view of the above problems, it proposes the embodiment of the present invention and overcomes the above problem or at least partly in order to provide one kind
A kind of video broadcasting method and a kind of corresponding video play device to solve the above problems.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of video broadcasting methods, are deployed in depending on networking
Networked terminals are regarded depending on networked server, the first view networked terminals and multiple second, the method includes：
First view networked terminals receive view networked server and send according to the downstream communications link to the first view networked terminals
, it is multiple second view networked terminals acquisition multi-path video data；
First is decoded processing to the multi-path video data respectively depending on networked terminals；
First view networked terminals carry out compression processing to the multi-path video data after decoding respectively；
Multi-path video data after compression processing is exported to connected equipment depending on networked terminals and is played out by first.
Optionally, view networked server is received according to the downlink to the first view networked terminals in the first view networked terminals
Before the multi-path video data of second view networked terminals acquisitions that communication link is sent, multiple, further include：
First establishes multiple storage regions depending on networked terminals to the multiple second respectively depending on networked terminals respectively.
Optionally, view networked server is received according to the downlink to the first view networked terminals in the first view networked terminals
After the multi-path video data of second view networked terminals acquisitions that communication link is sent, multiple, further include：
First inquires the second view networked terminals belonging to the multi-path video data depending on networked terminals respectively；
The multi-path video data is cached to affiliated second respectively depending on networked terminals and corresponding depending on networked terminals is deposited by first
In storage area domain.
Optionally, before described first is decoded processing to the multi-path video data respectively depending on networked terminals, also
Including：
First regards from multiple second depending on extracting the multichannel in the corresponding storage region of networked terminals respectively depending on networked terminals
Frequency evidence.
Optionally, further include：
First view networked terminals receive view networked server and send according to the downstream communications link to the first view networked terminals
Audio mixing data, the audio number that the multi-path audio-frequency data of the multiple second views networked terminals acquisitions of the audio mixing data mixing obtains
According to；
The audio mixing data are exported to connected equipment depending on networked terminals and are played out by first.
Optionally, further include：
First view networked terminals acquisition audio data and/or video data；
First sends the audio data and/or the video data to view networked server depending on networked terminals, to divide
The second view networked terminals are not sent to depending on the downstream communications links of networked terminals according to multiple second.
The embodiment of the invention also discloses a kind of video play device, view networked server, the are deployed in depending on networking
One view networked terminals and multiple second view networked terminals, described device are located in the first view networked terminals, including：
Video data receiving module, for receiving view networked server according to the downlink communication chain to the first view networked terminals
The multi-path video data of second view networked terminals acquisitions that road is sent, multiple；
Video data connects decoder module, for being decoded processing to the multi-path video data respectively；
Video data connects compression module, for carrying out compression processing to the multi-path video data after decoding respectively；
Video data connects output module, for exporting the multi-path video data after compression processing to connected equipment progress
It plays.
Optionally, further include：
Storage region establishes module, for establishing multiple memory blocks respectively depending on networked terminals to the multiple second respectively
Domain.
Optionally, further include：
Video data connects ownership enquiry module, for inquiring the second view networking belonging to the multi-path video data respectively eventually
End；
Video data cache module, for respectively caching the multi-path video data to affiliated second view networked terminals pair
In the storage region answered.
Optionally, further include：
Video data extraction module, described in being extracted from the corresponding storage region of multiple second view networked terminals respectively
Multi-path video data.
Optionally, further include：
Audio mixing data reception module, for receiving view networked server according to the downlink communication chain to the first view networked terminals
The audio mixing data that road is sent, the sound that the multi-path audio-frequency data of the multiple second view networked terminals acquisitions of audio mixing data mixing obtains
Frequency evidence；
Audio mixing data outputting module is played out for exporting the audio mixing data to connected equipment.
Optionally, further include：
Medium data acquisition module, for acquiring audio data and/or video data；
Media data sending module, for sending the audio data and/or the video data to view the Internet services
Device, to be sent to the second view networked terminals depending on the downstream communications links of networked terminals according to multiple second respectively.
The embodiment of the present invention includes following advantages：
The characteristic of application view networking of the embodiment of the present invention, the first view networked terminals receive view networked server according to first
Depending on networked terminals downstream communications link send, it is multiple second view networked terminals acquisition multi-path video data, be decoded
It after processing, carries out compression processing and exports to connected equipment to play out, not reducing transmitting terminal, (the i.e. second view networking is eventually
End) under the premise of video code rate, in receiving end, (the i.e. first view networked terminals) increase the process for cutting video frame, reduce every frame view
The resolution ratio of frequency evidence reduces the data volume of processing to compress the size of every frame video data, reduces the networking of the first view
The occupancy of terminal CPU, also, the multichannel of multiple second view networked terminals is played in the equipment being connected first depending on networked terminals
When video data, multi-path video data is to show simultaneously, not monopolizes screen, the area of occupancy is smaller, compressed video counts
It still can satisfy the clarity demand of user's browsing according to frame.
Detailed description of the invention
Fig. 1 is a kind of networking schematic diagram of view networking of one embodiment of the invention；
Fig. 2 is a kind of hardware structural diagram of node server of one embodiment of the invention；
Fig. 3 is a kind of hardware structural diagram of access switch of one embodiment of the invention；
Fig. 4 is that a kind of Ethernet association of one embodiment of the invention turns the hardware structural diagram of gateway；
Fig. 5 is a kind of step flow chart of video broadcasting method of one embodiment of the invention；
Fig. 6 is a kind of configuration diagram of view networked devices of one embodiment of the invention；
Fig. 7 is the step flow chart of another video broadcasting method of one embodiment of the invention；
Fig. 8 is a kind of structural block diagram of video play device of one embodiment of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
It is the important milestone of network Development depending on networking, is a real-time network, can be realized HD video real-time Transmission,
Push numerous Internet applications to HD video, high definition is face-to-face.
Real-time high-definition video switching technology is used depending on networking, it can be such as high in a network platform by required service
Clear video conference, Intellectualized monitoring analysis, emergency command, digital broadcast television, delay TV, the Web-based instruction, shows video monitoring
Field live streaming, VOD program request, TV Mail, individual character records (PVR), Intranet (manages) channel by oneself, intelligent video Broadcast Control, information publication
All be incorporated into a system platform etc. services such as tens of kinds of videos, voice, picture, text, communication, data, by TV or
Computer realizes that high-definition quality video plays.
Embodiment in order to enable those skilled in the art to better understand the present invention is introduced to depending on networking below：
Depending on networking, applied portion of techniques is as described below：
Network technology (Network Technology)
Traditional ethernet (Ethernet) is improved depending on the network technology innovation networked, with potential huge on network
Video flow.(Circuit is exchanged different from simple network packet packet switch (Packet Switching) or lattice network
Switching), Streaming demand is met using Packet Switching depending on networking technology.Has grouping depending on networking technology
Flexible, the simple and low price of exchange, is provided simultaneously with the quality and safety assurance of circuit switching, it is virtually electric to realize the whole network switch type
The seamless connection of road and data format.
Switching technology (Switching Technology)
Two advantages of asynchronous and packet switch that Ethernet is used depending on networking eliminate Ethernet under the premise of complete compatible and lack
It falls into, has the end-to-end seamless connection of the whole network, direct user terminal, directly carrying IP data packet.User data is in network-wide basis
It is not required to any format conversion.It is the more advanced form of Ethernet depending on networking, is a real-time exchange platform, can be realized at present mutually
The whole network large-scale high-definition realtime video transmission that networking cannot achieve pushes numerous network video applications to high Qinghua, unitizes.
Server technology (Server Technology)
It is different from traditional server, its Streaming Media depending on the server technology in networking and unified video platform
Transmission be built upon it is connection-oriented on the basis of, data-handling capacity is unrelated with flow, communication time, single network layer energy
Enough transmitted comprising signaling and data.For voice and video business, handled depending on networking and unified video platform Streaming Media
Complexity many simpler than data processing, efficiency substantially increase hundred times or more than traditional server.
Reservoir technology (Storage Technology)
The ultrahigh speed reservoir technology of unified video platform in order to adapt to the media content of vast capacity and super-flow and
Using state-of-the-art real time operating system, the programme information in server instruction is mapped to specific hard drive space, media
Content is no longer pass through server, and moment is directly delivered to user terminal, and user waits typical time less than 0.2 second.It optimizes
Sector distribution greatly reduces the mechanical movement of hard disc magnetic head tracking, and resource consumption only accounts for the 20% of the internet ad eundem IP, but
The concurrent flow greater than 3 times of traditional disk array is generated, overall efficiency promotes 10 times or more.
Network security technology (Network Security Technology)
Depending on the structural design networked by servicing independent licence system, equipment and the modes such as user data is completely isolated every time
The network security problem that puzzlement internet has thoroughly been eradicated from structure, does not need antivirus applet, firewall generally, has prevented black
The attack of visitor and virus, structural carefree secure network is provided for user.
It services innovative technology (Service Innovation Technology)
Business and transmission are fused together by unified video platform, whether single user, private user or a net
The sum total of network is all only primary automatic connection.User terminal, set-top box or PC are attached directly to unified video platform, obtain rich
The multimedia video service of rich colorful various forms.Unified video platform is traditional to substitute with table schema using " menu type "
Complicated applications programming, considerably less code, which can be used, can be realized complicated application, realize the new business innovation of " endless ".
Networking depending on networking is as described below：
It is a kind of central controlled network structure depending on networking, which can be Tree Network, Star network, ring network etc. class
Type, but centralized control node is needed to control whole network in network on this basis.
As shown in Figure 1, being divided into access net and Metropolitan Area Network (MAN) two parts depending on networking.
The equipment of access mesh portions can be mainly divided into 3 classes：Node server, access switch, terminal (including various machines
Top box, encoding board, memory etc.).Node server is connected with access switch, and access switch can be with multiple terminal phases
Even, and it can connect Ethernet.
Wherein, node server is the node that centralized control functions are played in access net, can control access switch and terminal.
Node server can directly be connected with access switch, can also directly be connected with terminal.
Similar, the equipment of metropolitan area mesh portions can also be divided into 3 classes：Metropolitan area server, node switch, node serve
Device.Metropolitan area server is connected with node switch, and node switch can be connected with multiple node servers.
Wherein, node server is the node server for accessing mesh portions, i.e. node server had both belonged to access wet end
Point, and belong to metropolitan area mesh portions.
Metropolitan area server is the node that centralized control functions are played in Metropolitan Area Network (MAN), can control node switch and node serve
Device.Metropolitan area server can be directly connected to node switch, can also be directly connected to node server.
It can be seen that be entirely a kind of central controlled network structure of layering depending on networking network, and node server and metropolitan area
The network controlled under server can be the various structures such as tree-shaped, star-like, cyclic annular.
Visually claim, access mesh portions can form unified video platform (part in virtual coil), and multiple unified videos are flat
Platform can form view networking；Each unified video platform can be interconnected by metropolitan area and wide area depending on networking.
Classify depending on networked devices
1.1 embodiment of the present invention can be mainly divided into 3 classes depending on the equipment in networking：Server, interchanger (including ether
Net gateway), terminal (including various set-top boxes, encoding board, memory etc.).Depending on networking can be divided on the whole Metropolitan Area Network (MAN) (or
National net, World Wide Web etc.) and access net.
1.2 equipment for wherein accessing mesh portions can be mainly divided into 3 classes：Node server, access switch (including ether
Net gateway), terminal (including various set-top boxes, encoding board, memory etc.).
The specific hardware structure of each access network equipment is：
Node server：
As shown in Fig. 2, mainly including Network Interface Module 201, switching engine module 202, CPU module 203, disk array
Module 204；
Wherein, Network Interface Module 201, the Bao Jun that CPU module 203, disk array module 204 are come in enter switching engine
Module 202；Switching engine module 202 look into the operation of address table 205 to the packet come in, to obtain the navigation information of packet；
And the packet is stored according to the navigation information of packet the queue of corresponding pack buffer 206；If the queue of pack buffer 206 is close
It is full, then it abandons；All pack buffer queues of 202 poll of switching engine mould, are forwarded if meeting the following conditions：1) port
It is less than to send caching；2) the queue package counting facility is greater than zero.Disk array module 204 mainly realizes the control to hard disk, including
The operation such as initialization, read-write to hard disk；CPU module 203 is mainly responsible between access switch, terminal (not shown)
Protocol processes, to address table 205 (including descending protocol packet address table, uplink protocol package address table, data packet addressed table)
Configuration, and, the configuration to disk array module 204.
Access switch：
As shown in figure 3, mainly including Network Interface Module (downstream network interface module 301, uplink network interface module
302), switching engine module 303 and CPU module 304；
Wherein, the packet (upstream data) that downstream network interface module 301 is come in enters packet detection module 305；Packet detection mould
Whether mesh way address (DA), source address (SA), type of data packet and the packet length of the detection packet of block 305 meet the requirements, if met,
It then distributes corresponding flow identifier (stream-id), and enters switching engine module 303, otherwise abandon；Uplink network interface mould
The packet (downlink data) that block 302 is come in enters switching engine module 303；The data packet that CPU module 204 is come in enters switching engine
Module 303；Switching engine module 303 look into the operation of address table 306 to the packet come in, to obtain the navigation information of packet；
If the packet into switching engine module 303 is that downstream network interface is gone toward uplink network interface, in conjunction with flow identifier
(stream-id) packet is stored in the queue of corresponding pack buffer 307；If the queue of the pack buffer 307 is close full,
It abandons；If the packet into switching engine module 303 is not that downstream network interface is gone toward uplink network interface, according to packet
Navigation information is stored in the data packet queue of corresponding pack buffer 307；If the queue of the pack buffer 307 is close full,
Then abandon.
All pack buffer queues of 303 poll of switching engine module, are divided to two kinds of situations in embodiments of the present invention：
If the queue is that downstream network interface is gone toward uplink network interface, meets the following conditions and be forwarded：1)
It is less than that the port sends caching；2) the queue package counting facility is greater than zero；3) token that rate control module generates is obtained；
If the queue is not that downstream network interface is gone toward uplink network interface, meets the following conditions and be forwarded：
1) it is less than to send caching for the port；2) the queue package counting facility is greater than zero.
Rate control module 208 is configured by CPU module 204, to all downlink networks in programmable interval
Interface generates token toward the pack buffer queue that uplink network interface is gone, to control the code rate of forwarded upstream.
CPU module 304 is mainly responsible for the protocol processes between node server, the configuration to address table 306, and,
Configuration to rate control module 308.
Ethernet association turns gateway：
As shown in figure 4, mainly including Network Interface Module (downstream network interface module 401, uplink network interface module
402), switching engine module 403, CPU module 404, packet detection module 405, rate control module 408, address table 406, Bao Huan
Storage 407 and MAC adding module 409, MAC removing module 410.
Wherein, the data packet that downstream network interface module 401 is come in enters packet detection module 405；Packet detection module 405 is examined
Ethernet mac DA, ethernet mac SA, Ethernet length or frame type, the view networking mesh way address of measured data packet
DA, whether meet the requirements depending on networking source address SA, depending on networking data Packet type and packet length, corresponding stream is distributed if meeting
Identifier (stream-id)；Then, MAC DA, MAC SA, length or frame type are subtracted by MAC removing module 410
(2byte), and enter corresponding receive and cache, otherwise abandon；
Downstream network interface module 401 detects the transmission caching of the port, according to the view of packet networking mesh if there is Bao Ze
Address D A knows the ethernet mac DA of corresponding terminal, adds the ethernet mac DA of terminal, Ethernet assists the MAC for turning gateway
SA, Ethernet length or frame type, and send.
The function that Ethernet association turns other modules in gateway is similar with access switch.
Terminal：
It mainly include Network Interface Module, Service Processing Module and CPU module；For example, set-top box mainly connects including network
Mouth mold block, video/audio encoding and decoding engine modules, CPU module；Encoding board mainly includes Network Interface Module, video encoding engine
Module, CPU module；Memory mainly includes Network Interface Module, CPU module and disk array module.
The equipment of 1.3 metropolitan area mesh portions can be mainly divided into 2 classes：Node server, node switch, metropolitan area server.
Wherein, node switch mainly includes Network Interface Module, switching engine module and CPU module；Metropolitan area server mainly includes
Network Interface Module, switching engine module and CPU module are constituted.
2, networking data package definition is regarded
2.1 access network data package definitions
The data packet of access net mainly includes following sections：Destination address (DA), source address (SA), reserve bytes,
payload(PDU)、CRC。
As shown in the table, the data packet for accessing net mainly includes following sections：
| DA | SA | Reserved | Payload | CRC |
Wherein：
Destination address (DA) is made of 8 bytes (byte), and first character section indicates type (such as the various associations of data packet
Discuss packet, multicast packet, unicast packet etc.), be up to 256 kinds of possibility, the second byte to the 6th byte is metropolitan area net address,
Seven, the 8th bytes are access net address；
Source address (SA) is also to be made of 8 bytes (byte), is defined identical as destination address (DA)；
Reserve bytes are made of 2 bytes；
The part payload has different length according to the type of different datagrams, is if it is various protocol packages
64 bytes are 32+1024=1056 bytes if it is single group unicast packets words, are not restricted to above 2 kinds certainly；
CRC is made of 4 bytes, and calculation method follows the Ethernet CRC algorithm of standard.
2.2 Metropolitan Area Network (MAN) packet definitions
The topology of Metropolitan Area Network (MAN) is pattern, may there is 2 kinds, connection even of more than two kinds, i.e. node switching between two equipment
It can all can exceed that 2 kinds between machine and node server, node switch and node switch, node switch and node server
Connection.But the metropolitan area net address of metropolitan area network equipment is uniquely, to close to accurately describe the connection between metropolitan area network equipment
System, introduces parameter in embodiments of the present invention：Label uniquely to describe a metropolitan area network equipment.
(Multi-Protocol Label Switch, multiprotocol label are handed over by the definition of label and MPLS in this specification
Change) label definition it is similar, it is assumed that between equipment A and equipment B there are two connection, then data packet from equipment A to equipment B just
There are 2 labels, data packet also there are 2 labels from equipment B to equipment A.Label is divided into label, outgoing label, it is assumed that data packet enters
The label (entering label) of equipment A is 0x0000, and the label (outgoing label) when this data packet leaves equipment A may reform into
0x0001.The networking process of Metropolitan Area Network (MAN) is to enter network process under centralized control, also means that address distribution, the label of Metropolitan Area Network (MAN)
Distribution be all to be dominated by metropolitan area server, node switch, node server be all passively execute, this point with
The label distribution of MPLS is different, and the distribution of the label of MPLS is the result that interchanger, server are negotiated mutually.
As shown in the table, the data packet of Metropolitan Area Network (MAN) mainly includes following sections：
| DA | SA | Reserved | Label | Payload | CRC |
That is destination address (DA), source address (SA), reserve bytes (Reserved), label, payload (PDU), CRC.Its
In, the format of label, which can refer to, such as gives a definition：Label is 32bit, wherein high 16bit retains, only with low 16bit, its position
Set is between the reserve bytes and payload of data packet.
Based on the above-mentioned characteristic of view networking, one of the core concepts of the embodiments of the present invention is proposed, it then follows regard the association of networking
View, the first view networked terminals and carries out cutting processing depending on the video datas of networked terminals to second, to compress resolution ratio.
Referring to Fig. 5, a kind of step flow chart of video broadcasting method of one embodiment of the invention is shown, this method can
To be applied in view networking, it can specifically include following steps：
Step 501, the first view networked terminals receive view networked server according to the downlink communication to the first view networked terminals
The multi-path video data of second view networked terminals acquisitions that link is sent, multiple.
As shown in fig. 6, depending on networking 600 in be deployed with view networked server 610, first regard networked terminals 621 with it is multiple
Second view networked terminals 622.
In the concrete realization, first networked terminals 610 are regarded and second to regard networked terminals 620 can be set-top box
Box on (SetTopBox, STB), commonly referred to as set-top box or machine is the equipment of connection a television set and outside source, it
The digital signal of compression can be changed into television content, and shown on a television set.
In general, set-top box connects other equipment 630, for example, can connect camera and microphone, for acquiring view
The multi-medium datas such as frequency evidence and audio data, also can connect television set, more for playing video data and audio data etc.
Media data.
In embodiments of the present invention, first depending on networked terminals with multiple second view networked terminals can apply video lead to
In the scenes such as words, video conference, video monitoring, multiple second, which can pass through view depending on the multi-path video data that networked terminals acquire, joins
The agreement of net is sent to view networked server, and multi-path video data is forwarded to the first view networked terminals depending on networked server.
For example, second can encapsulate the data of video datas depending on networked terminals by regarding 2000 specifications of networking protocol as follows
Packet：
In this practical application, networking is regarded as the network with centralized control functions, including main control server and undernet
Equipment, which includes terminal, and one of the core idea depending on networking is, by notifying to exchange by main control server
Equipment is directed to when time downstream communications link of service matches table, and the table for being then based on the configuration carries out the transmission of data packet.
That is, including depending on the communication means in networking：
Main control server configuration is when time downstream communications link of service；
Work as time data packet of service for what source terminal was sent, is sent to target terminal (such as according to the downstream communications link
First view networked terminals).
In embodiments of the present invention, it configures when time downstream communications link of service includes：Notice is logical when time downlink of service
Believe that switching equipment involved in link matches table；
Furthermore, include according to downstream communications link transmission：Configured table is inquired, switching equipment is received to institute
Data packet is transmitted by corresponding port.
In the concrete realization, service includes unicast communication service and Multicast Communication Service.I.e. either cast communication is still
Unicast communication can realize the communication in view networking using the above-mentioned core idea with table-table.
As previously mentioned, view networking includes access mesh portions, in access net, which is node server, under
The grade network equipment includes access switch and terminal.
For the unicast communication service in access net, the main control server configuration is when time downlink communication chain of service
The step of road, may comprise steps of：
Sub-step S11, the service request protocol package that main control server is initiated according to source terminal are obtained when time downlink of service
Communication link information, downstream communications link information include participating in when time downlink of the main control server of service and access switch
Communication port information.
Sub-step S12, downstream communication ports information of the main control server according to control server, data packet inside it
The downlink port that setting is oriented to when time data packet of service in the table of location；And believe according to the downstream communication ports of access switch
Breath, to corresponding access switch sending port configuration order.
Sub-step S13, access switch according in port configuration command data packet addressed table inside it, setting when time
The downlink port that the data packet of service is oriented to.
For the Multicast Communication Service (such as video conference) in access net, main control server is obtained when under time service
The step of row communication link information may include following sub-step：
Sub-step S21, main control server obtain the service request agreement for the application Multicast Communication Service that target terminal is initiated
It wraps, includes the access net address of service type information, service content information and target terminal in service request protocol package；Wherein,
It include service number in service content information.
Sub-step S22, main control server according to the service number in preset content-address mapping table, extraction source
The access net address of terminal.
Sub-step S23, main control server obtains the corresponding multicast address of source terminal, and distributes to target terminal；And according to
According to the access net address of service type information, source terminal and target terminal, the communication link information when time multicast services is obtained.
Step 502, first processing is decoded to the multi-path video data respectively depending on networked terminals.
Based on view networking protocol, the second video data sent depending on networked terminals usually carries out coded treatment, such as uses
H.264 it is encoded.
After first receives the multi-path video data of multiple view networked terminals depending on networked terminals, then relevant solution can be called
Code device is decoded, and is such as used and is H.264 decoded.
Step 503, the first view networked terminals carry out compression processing to the multi-path video data after decoding respectively.
The multichannel view of multiple second view networked terminals is played in the connected equipment (such as television set) of the first view networked terminals
Frequency according to when, multi-path video data is to show simultaneously, not monopolize screen.
Therefore, in embodiments of the present invention, original decoding process is optimized, is not reducing transmitting terminal (i.e. second
Depending on networked terminals) under the premise of video code rate, in receiving end, (the i.e. first view networked terminals) increase the process for cutting video frame, i.e.,
Compression processing is carried out to every frame video data after decoding, to reduce the resolution ratio of every frame video data, to compress every frame
The size of video data.
Step 504, first the multi-path video data after compression processing is exported to connected equipment progress depending on networked terminals
It plays.
In embodiments of the present invention, first every frame video data after compression processing is exported to connected depending on networked terminals
Equipment (such as television set) shown, realize that the video data of opposite end is being locally displayed.
The characteristic of application view networking of the embodiment of the present invention, the first view networked terminals receive view networked server according to first
Depending on networked terminals downstream communications link send, it is multiple second view networked terminals acquisition multi-path video data, be decoded
It after processing, carries out compression processing and exports to connected equipment to play out, not reducing transmitting terminal, (the i.e. second view networking is eventually
End) under the premise of video code rate, in receiving end, (the i.e. first view networked terminals) increase the process for cutting video frame, reduce every frame view
The resolution ratio of frequency evidence reduces the data volume of processing to compress the size of every frame video data, reduces the networking of the first view
The occupancy of terminal CPU, also, the multichannel of multiple second view networked terminals is played in the equipment being connected first depending on networked terminals
When video data, multi-path video data is to show simultaneously, not monopolizes screen, the area of occupancy is smaller, compressed video counts
It still can satisfy the clarity demand of user's browsing according to frame.
Referring to Fig. 7, the step flow chart of another video broadcasting method of one embodiment of the invention, this method are shown
It can be applied in view networking, can specifically include following steps：
Step 701, first multiple memory blocks are established respectively depending on networked terminals to the multiple second respectively depending on networked terminals
Domain.
In embodiments of the present invention, in scene initializations such as video calling, video conference, video monitorings, the first view connection
Network termination can establish a storage region, such as buffer queue depending on networked terminals for each second in local respectively.
Step 702, the first view networked terminals receive view networked server according to the downlink communication to the first view networked terminals
The multi-path video data of second view networked terminals acquisitions that link is sent, multiple.
Step 703, first the second view networked terminals belonging to the multi-path video data are inquired respectively depending on networked terminals.
Step 704, first the multi-path video data is cached to affiliated second view networked terminals respectively depending on networked terminals
In corresponding storage region.
Based on view networking agreement, can by view networking number, MAC (Media Access Control or
Medium Access Control, physical address or hardware address) the information flags video data such as address source.
In embodiments of the present invention, first can be extracted from the data packet of multi-path video data depending on networked terminals it is relevant
Information determines the second view networked terminals belonging to it, by the data pack buffer of the road video data to affiliated second view networked terminals
In corresponding storage region, classification caching is realized.
Therefore, each second view is individually shown in the subsequent equipment (such as television set) that can be connected first depending on networked terminals
The video data of networked terminals.
Step 705, first institute is extracted in corresponding storage region depending on networked terminals from multiple second respectively depending on networked terminals
State multi-path video data.
In the concrete realization, after caching multi-path video data, first can star independent thread depending on networked terminals,
Multi-path video data is extracted from the multiple second storage regions depending on networked terminals respectively, to carry out subsequent decoding, compression etc.
Processing.
Step 706, first processing is decoded to the multi-path video data respectively depending on networked terminals.
Step 707, the first view networked terminals carry out compression processing to the multi-path video data after decoding respectively.
Step 708, first the multi-path video data after compression processing is exported to connected equipment progress depending on networked terminals
It plays.
Step 709, the first view networked terminals receive view networked server according to the downlink communication to the first view networked terminals
The audio mixing data that link is sent.
Wherein, the audio data that the multi-path audio-frequency data of the multiple second view networked terminals acquisitions of audio mixing data mixing obtains.
In embodiments of the present invention, multiple second can pass through view networking depending on the multi-path audio-frequency data that networked terminals acquire
Agreement is sent to view networked server, after carrying out mixing acquisition audio mixing data depending on networked server, extremely by audio mixing data forwarding
First view networked terminals.
For example, second can encapsulate the data of audio datas depending on networked terminals by regarding 2001 specifications of networking protocol as follows
Packet：
Step 710, it first the audio mixing data is exported to connected equipment depending on networked terminals plays out.
In embodiments of the present invention, first Dare is exported depending on the audio mixing data of networked terminals to connected depending on networked terminals
Equipment (such as television set) plays out, and realizes the audio data of opposite end in local broadcasting.
Step 711, the first view networked terminals acquisition audio data and/or video data.
Step 712, first the audio data and/or the video data are sent to view the Internet services depending on networked terminals
Device, to be sent to the second view networked terminals depending on the downstream communications links of networked terminals according to multiple second respectively.
In the application scenarios such as video conference, the first view networked terminals and second regard networked terminals outside source each other,
I.e. first acquires audio data and/or video data depending on networked terminals and is networked eventually by being sent to the second view depending on networked server
End, second plays the audio data and/or video data depending on networked terminals, meanwhile, the second view networked terminals acquire audio data
And/or video data and by being sent to the first view networked terminals depending on networked server, first plays the audio depending on networked terminals
Data and/or video data.
It should be noted that for some the second view networked terminals, the audio data of the first view networked terminals is networked in view
Second mix depending on the audio datas of networked terminals with other in server and to obtain audio mixing data, retransmits to the second view connection
Network termination.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
Necessary to example.
Referring to Fig. 8, a kind of structural block diagram of video play device of one embodiment of the invention is shown, in view networking
View networked server, the first view networked terminals and multiple second view networked terminals are deployed with, described device is located at the first view networking
In terminal, following module can specifically include：
Video data receiving module 801 is logical according to the downlink to the first view networked terminals for receiving view networked server
Believe the multi-path video data of second view networked terminals acquisitions that link is sent, multiple；
Video data connects decoder module 802, for being decoded processing to the multi-path video data respectively；
Video data connects compression module 803, for carrying out compression processing to the multi-path video data after decoding respectively；
Video data connects output module 804, for exporting the multi-path video data after compression processing to connected equipment
It plays out.
In one embodiment of the invention, further include：
Storage region establishes module, for establishing multiple memory blocks respectively depending on networked terminals to the multiple second respectively
Domain.
In one embodiment of the invention, further include：
Video data connects ownership enquiry module, for inquiring the second view networking belonging to the multi-path video data respectively eventually
End；
Video data cache module, for respectively caching the multi-path video data to affiliated second view networked terminals pair
In the storage region answered.
In one embodiment of the invention, further include：
Video data extraction module, described in being extracted from the corresponding storage region of multiple second view networked terminals respectively
Multi-path video data.
In one embodiment of the invention, further include：
Audio mixing data reception module, for receiving view networked server according to the downlink communication chain to the first view networked terminals
The audio mixing data that road is sent, the sound that the multi-path audio-frequency data of the multiple second view networked terminals acquisitions of audio mixing data mixing obtains
Frequency evidence；
Audio mixing data outputting module is played out for exporting the audio mixing data to connected equipment.
In one embodiment of the invention, further include：
Medium data acquisition module, for acquiring audio data and/or video data；
Media data sending module, for sending the audio data and/or the video data to view the Internet services
Device, to be sent to the second view networked terminals depending on the downstream communications links of networked terminals according to multiple second respectively.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Above to a kind of video broadcasting method provided by the present invention and a kind of video play device, detailed Jie has been carried out
It continues, used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is only
It is to be used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to this hair
Bright thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not manage
Solution is limitation of the present invention.
Claims (10)
1. a kind of video broadcasting method, which is characterized in that be deployed with view networked server, the first view networked terminals in depending on networking
Networked terminals are regarded with multiple second, the method includes：
First view networked terminals receive that view networked server is sent according to the downstream communications link to the first view networked terminals, more
The multi-path video data of a second view networked terminals acquisition；
First is decoded processing to the multi-path video data respectively depending on networked terminals；
First view networked terminals carry out compression processing to the multi-path video data after decoding respectively；
Multi-path video data after compression processing is exported to connected equipment depending on networked terminals and is played out by first.
2. the method according to claim 1, wherein receiving view networked server in the first view networked terminals
The multi-path video data of second view networked terminals acquisitions sent according to the downstream communications link to the first view networked terminals, multiple
Before, further include：
First establishes multiple storage regions depending on networked terminals to the multiple second respectively depending on networked terminals respectively.
3. method according to claim 1 or 2, which is characterized in that receive view networking clothes in the first view networked terminals
The multi-channel video of second view networked terminals acquisitions that business device is sent according to the downstream communications link to the first view networked terminals, multiple
After data, further include：
First inquires the second view networked terminals belonging to the multi-path video data depending on networked terminals respectively；
The multi-path video data is cached memory block corresponding to affiliated second view networked terminals respectively depending on networked terminals by first
In domain.
4. according to the method described in claim 3, it is characterized in that, being regarded respectively to the multichannel in the first view networked terminals
Frequency evidence is decoded before processing, further includes：
First depending on networked terminals respectively from multiple second depending on extracting the multi-channel video number in the corresponding storage region of networked terminals
According to.
5. method according to claim 1 or 2 or 4, which is characterized in that further include：
First view networked terminals receive view networked server according to the mixed of the downstream communications link transmission to the first view networked terminals
Sound data, the audio data that the multi-path audio-frequency data of the multiple second view networked terminals acquisitions of audio mixing data mixing obtains；
The audio mixing data are exported to connected equipment depending on networked terminals and are played out by first.
6. method according to claim 1 or 2 or 4, which is characterized in that further include：
First view networked terminals acquisition audio data and/or video data；
First sends the audio data and/or the video data to view networked server, to press respectively depending on networked terminals
The second view networked terminals are sent to depending on the downstream communications links of networked terminals according to multiple second.
7. a kind of video play device, which is characterized in that be deployed with view networked server, the first view networked terminals in depending on networking
With multiple second view networked terminals, described device is located in the first view networked terminals, including：
Video data receiving module is sent out for receiving view networked server according to the downstream communications link to the first view networked terminals
The multi-path video data of second view networked terminals acquisitions send, multiple；
Video data connects decoder module, for being decoded processing to the multi-path video data respectively；
Video data connects compression module, for carrying out compression processing to the multi-path video data after decoding respectively；
Video data connects output module, broadcasts for exporting the multi-path video data after compression processing to connected equipment
It puts.
8. device according to claim 7, which is characterized in that further include：
Storage region establishes module, for establishing multiple storage regions respectively depending on networked terminals to the multiple second respectively.
9. device according to claim 7 or 8, which is characterized in that further include：
Video data connects ownership enquiry module, for inquiring the second view networked terminals belonging to the multi-path video data respectively；
Video data cache module caches the multi-path video data for respectively corresponding to affiliated second view networked terminals
In storage region.
10. device according to claim 9, which is characterized in that further include：
Video data extraction module, for respectively from multiple second depending on extracting the multichannel in the corresponding storage region of networked terminals
Video data.
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