CN101964902A - Network video stream playing method and connecting equipment - Google Patents

Network video stream playing method and connecting equipment Download PDF

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Publication number
CN101964902A
CN101964902A CN2010102942381A CN201010294238A CN101964902A CN 101964902 A CN101964902 A CN 101964902A CN 2010102942381 A CN2010102942381 A CN 2010102942381A CN 201010294238 A CN201010294238 A CN 201010294238A CN 101964902 A CN101964902 A CN 101964902A
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video stream
television set
network video
connection device
network
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叶建生
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a network video stream playing method and connecting equipment so as to solve the problem of resource waste caused by the same video stream decoding function of a set top box and a television when the set top box is adopted to assist the television in playing network video streams in the prior art. The method comprises the following steps that: the connecting equipment not with video stream decoding function receives request information for acquiring the network video stream sent by the television, sends the information to a video server in the Internet, receives the network video streams corresponding to the information, which are fed back by the video server, and sends the network video streams to the television for decoding and playing.

Description

The player method of network video stream and connection device
Technical field
The present invention relates to communication technical field, relate in particular to a kind of player method and connection device of network video stream.
Background technology
The appearance of liquid crystal TV set, plasma TV is for people's life has brought very big variation.Television set manufacturer also constantly innovates, for television set increases more function.For example, because popularizing of video signal digitization, at present television set on the market is all built-in decoding video stream chip, thus present television set generally all possesses the decoding video stream function, can play-over the video file on the movable storage devices such as leaving flash disk or portable hard drive in.Yet present most of television set is not owing to also possess the function that directly is connected with the Internet, when television set need when playing, also need to rely on external set-top box to the video flowing (hereinafter to be referred as network video stream) that comes automatic network.
In the prior art, when utilizing set-top box to assist to realize the television for play network video stream, the function that often is used in the set-top box mainly comprises network connection management, Digital Signal Processing, decoding video stream and process user alternative events etc., in fact, similar decoding video stream function, it is the function that television set has in the market carried, this function need not to be realized by set-top box, caused in the television set free time of those functions to cause the wasting of resources thereby realize by set-top box that these functions are actually.
Summary of the invention
The embodiment of the invention provides a kind of broadcast of network video stream, when assisting the television for play network video stream, owing to the decoding video stream function of set-top box and the identical problem that causes the wasting of resources of decoding video stream function of television set in order to solve the employing set-top box that exists in the prior art.
The embodiment of the invention is by the following technical solutions:
A kind of player method of network video stream comprises: the connection device that does not possess the decoding video stream function receives the message of the request acquisition network video stream of television set transmission; And described message sent to video server in the Internet; And the network video stream corresponding that receives described video server feedback, and the network video stream that receives sent to the television set broadcast of decoding with described message.
Preferably, described message comprises the video file sign that television set is chosen from the video file identification list; And before described connection device receives described message, also comprise: after described connection device receives the detection signal that television set sends, return the identification information of connection device, and obtain the video file identification list from described video server to television set; And when receiving the identification information of the described connection device that television set chooses and send, described video file identification list is sent to described television set.
Preferably, described connection device is connected with television set by the USB interface of television set, obtains the required electric weight of the described connection device of operation by described USB interface, and receives the described message that television set sends by described USB interface.
Preferably, the network video stream corresponding with described message of described feedback is the network video stream of IP based network protocol encapsulation; And described connection device sends to the television set broadcast of decoding with the network video stream that receives, specifically comprise: described connection device carries out decapsulation according to the IP network agreement to the network video stream that encapsulates, and after USB interface-based data in magnetic disk reads the network video stream of agreement after to decapsulation and encapsulate, send to the television set broadcast of decoding.
Preferably, when receiving described network video stream, described network video stream is stored in the buffer zone; And described network video stream sent to the television set broadcast of decoding, be specially:, send to the television set broadcast of decoding being stored in described network video stream in the buffer zone according to the decoding code check of television set.
A kind of connection device, described connection device does not possess the decoding video stream function, and described connection device specifically comprises: the message sink unit is used to receive the message that request that television set sends obtains network video stream; Message sending unit is used for the described message that the message sink unit receives is sent to the video server of the Internet; The network video stream receiving element, the corresponding network video stream of described message that sends with message sending unit that is used to receive described video server feedback; Transmitting element is used for the network video stream that the network video stream receiving element receives is sent to the television set broadcast of decoding.
The beneficial effect of the embodiment of the invention is as follows: the such scheme that the embodiment of the invention provides is at television set and be between the video server in the Internet and increased a connection device that does not possess the decoding video stream function newly, and transmit the message that request that television set sends obtains network video stream, and the network video stream corresponding with this message of video server feedback sent to the television set broadcast of decoding by the video server of this connection device in the Internet.The such scheme that adopts the embodiment of the invention to provide, between television set and video server, need not to carry out the transmitting-receiving of network video stream by the set-top box of function complexity again, but only need just can assist the television for play network video stream by the simple relatively connection device of this above-mentioned function, thereby when having solved the employing set-top box that exists in the prior art and having assisted the television for play network video stream, owing to the decoding video stream function of set-top box and the identical problem that causes the wasting of resources of decoding video stream function of television set.
Description of drawings
Fig. 1 assists the scheme schematic diagram of television for play network video stream for utilizing set-top box in the prior art;
The idiographic flow schematic diagram of the player method of a kind of network video stream that Fig. 2 provides for the embodiment of the invention;
The concrete schematic diagram of a kind of connection device that Fig. 3 provides for the embodiment of the invention;
The scheme applied environment schematic diagram in practice that Fig. 4 provides for the embodiment of the invention;
The concrete application flow schematic diagram of scheme in actual environment that Fig. 5 provides for the embodiment of the invention.
Embodiment
When assisting the television for play network video stream in order to solve the employing set-top box that exists in the prior art, owing to the decoding video stream function of set-top box and the identical problem that causes the wasting of resources of decoding video stream function of television set, the inventor assists the scheme of television for play network video stream to analyze to utilizing set-top box in the prior art as shown in Figure 1.In prior art as described in Figure 1, set-top box is connected with audio input end with the video inputs of television set respectively by the AV data wire, and is connected with cable TV or IPTV program input source (such as the video server that is arranged in network) by coaxial cable or RJ45 twisted-pair feeder.When set-top box starts, it can finish the registration of television set on video server, and finish mutual between set-top box and the user by the system control module of set-top box self, such as, the user can use a teleswitch or the set-top box button chooses a video frequency program sign from the video frequency program identification list that set-top box provides, thereby set-top box can obtain the network video stream of this video frequency program sign indication to the video server request, and sends to television set after the network video stream that obtains decoded and play.In the scheme that prior art provides, the function that network video stream is decoded is realized that by set-top box this function in the television set that so just is is left unused.
In order to make full use of the processing resource of television set, avoid the idle and wasting of resources that causes of its function, the inventor considers to cancel at television set and video server set-top box is set, and replaces this set-top box with a connection device.This connection device need not to possess the decoding video stream function, can directly the network video stream that is sent by video server be sent to television set, thereby television set can be enabled the decoding function of self and comes the broadcast of decoding of this network video stream.Particularly, the embodiment of the invention at first provides a kind of player method of network video stream, and the idiographic flow schematic diagram of this method may further comprise the steps as shown in Figure 2:
Step 21, the connection device that does not possess the decoding video stream function receives the message of the request acquisition network video stream of television set transmission, in embodiments of the present invention, connection device can be connected with television set by the USB interface of television set, and the above-mentioned message that sends by this USB interface television set, in addition, because the USB interface of television set can be used as the power supply that is connected to the mini-plant on the television set, therefore, in the embodiment of the invention, this connection device is to obtain the required electric weight of operation connection device by this USB interface;
Step 22 sends to video server in the Internet with this message, and wherein, this connection device can be to be connected to the Internet by wired or wireless mode;
Step 23, the network video stream corresponding of receiver, video server feedback with this message, and the network video stream that receives sent to the television set broadcast of decoding, in this step, when the network video stream corresponding with above-mentioned message of video server feedback is the network video stream of IP based network protocol encapsulation, connection device can carry out decapsulation to the network video stream that encapsulates according to the IP network agreement, and after USB interface-based data in magnetic disk read the network video stream of agreement after to decapsulation and encapsulate again, the network video stream after will encapsulating again again sent to the television set broadcast of decoding.
The said method that the embodiment of the invention provides assists the scheme of television for play network video stream to compare with the available technology adopting set-top box, the function of the above-mentioned connection device in the embodiment of the invention is very simple with respect to the function of set-top box, and, do not possess the function that video flowing is decoded in this connection device, thereby accessing, the decoding video stream function that carries in the television set enables, therefore, this just has been equivalent to save the cover hardware and software resource corresponding with the decoding video stream function.And, the said method that provides by the embodiment of the invention, though omitted the function of decoding network video stream in the connection device, yet, because television set self can be decoded to network video stream, so this method can not influence decoding and the broadcast of television set to network video stream on the basis of having saved the hardware and software resources, thereby on result of broadcast, this scheme that the embodiment of the invention provides can reach the effect that adopts prior art to reach.
The inventor in the prior art, also may possess some other functions similar to television function prior art being analyzed further discovery of back in the set-top box.Such as, by the remote controller equal controller, set-top box can also be directly and the user carry out alternately, obtaining the video frequency program sign that the user utilizes control device to choose, and this function also is the function that television set possessed in the market.
In embodiments of the present invention, enable itself and user's function in order to make television set, in the said method that the embodiment of the invention provides, above-mentioned request obtains can also to comprise in the message of network video stream the situation (television set choose this video file sign can control remote controller the user carry out under television set is controlled) of the video file sign that television set chooses from the video file identification list, can also further before connection device receives the message of request acquisition network video stream, comprise the steps:
At first, after connection device receives the detection signal of television set transmission, return the identification information of connection device to television set, and obtain the video file identification list from video server, wherein, this identification information is used for television set, and follow-up to choose connection device used, this identification information can but to be not limited to be virtual disk information of connection device etc.;
Then, connection device sends to television set with the video file identification list when receiving the identification information of this connection device that television set chooses and send.
In example of the present invention, connection device can not possess the ability with user interactions, it can send to television set with the video file identification list, by the ability of television set according to self and user interactions, realize choosing to the video file sign, thereby compare with the scheme of user interactions with the use set-top box that prior art provides, this method that the embodiment of the invention provides has further avoided set-top box and television set all to possess the wasting of resources that causes with the function of user interactions again.
Need to prove, because desired transmission rate did not match when the transmission rate of the network video stream of video server feedback may be carried out the normal decoder broadcast to network video stream with television set, therefore, in order to guarantee television set the decoding of network video stream smoothness is play, in embodiments of the present invention, connection device can be when receiving network video stream, network video stream is stored in the buffer zone, so that network video stream is before being transferred to television set, can access certain buffering, thereby connection device again according to the decoding code check of television set will be stored in network video stream in the buffer zone send to television set decode play after, the video pictures of television for play can compare smoothness.
The player method of the above-mentioned network video stream that provides corresponding to the embodiment of the invention, the embodiment of the invention also provides a kind of connection device, this connection device does not possess the decoding video stream function, it is used for solving employing set-top box that prior art exists when assisting the television for play network video stream, owing to the decoding video stream function of set-top box and the identical problem that causes the wasting of resources of decoding video stream function of television set.The concrete structure schematic diagram of this connection device comprises following functional unit as shown in Figure 3:
Message sink unit 31 is used to receive the message that request that television set sends obtains network video stream;
Message sending unit 32 is used for the message that message sink unit 31 receives is sent to the video server of the Internet;
Network video stream receiving element 33, the corresponding network video streams of described message that send with message sending unit 32 that are used for the receiver, video server feedback;
Transmitting element 34 is used for the network video stream that network video stream receiving element 33 receives is sent to the television set broadcast of decoding.
Preferably, when above-mentioned message comprised the video file sign that television set chooses from the video file identification list, the above-mentioned connection device that the embodiment of the invention provides can further include with lower unit, provides the video file identification list to be embodied as television set:
The tabulation acquiring unit is used for before the message sink unit receives above-mentioned message, after receiving the detection signal that television set sends, returns the identification information of connection device to television set, and obtains the video file identification list from video server;
The tabulation transmitting element is used for when receiving the identification information of the connection device that television set chooses and send, and the video file identification list that the tabulation acquiring unit is obtained sends to television set.
In embodiments of the present invention, this connection device can be connected with television set by the USB interface of television set, and obtain operation connection device required electric weight by this USB interface, and message sink unit 31 also can receive the above-mentioned message that television set sends by this USB interface.
In embodiments of the present invention, when the network video stream corresponding with above-mentioned message of video server feedback is the network video stream of IP based network protocol encapsulation, transmitting element 34 can carry out decapsulation to the network video stream that encapsulates according to the IP network agreement, and USB interface-based data in magnetic disk reads the network video stream of agreement after to decapsulation and encapsulates, thereby after the realization protocol conversion, the network video stream of encapsulation is again sent to the television set broadcast of decoding.
In embodiments of the present invention, in order to guarantee the TV function playing network video flowing of decoding glibly, the said equipment can further include: buffer unit, be used for when network video stream receiving element 33 receives network video stream, the network video stream that network video stream receiving element 33 is received is stored in the buffer zone; Transmitting element 34 then can specifically be used for the decoding code check according to television set, buffer unit is stored in network video stream in the buffer zone sends to the television set broadcast of decoding.
Below in practice one of the said method that provides with the embodiment of the invention have particular application as example, describe the application flow of said method in detail.
At first need to prove said method applied environment in practice, this applied environment can comprise television set, the described connection device of the embodiment of the invention, video server and the necessary network switch, and optionally other network is shared video source etc.This environment schematic diagram is as shown in Figure 4: television set is connected by USB interface with connection device, connection device is connected with video server in the Internet by the network switch in wired or wireless mode, and connection device can also be by other shared network video source of internet access simultaneously.
As shown in Figure 4, in actual applications, connection device can comprise: usb interface module 411, Network Interface Module 412, protocol adaptation module 413, data memory module 414 and driver module 415.The concrete function of each module is as follows:
Usb interface module 411 is mainly used in television set and is connected, and provides power supply and its communication ability to connection device;
Network Interface Module 412 is mainly used in to be set up being connected between the network equipment and the video server.Optionally connected mode comprises wired mode (such as connecting by coaxial cable or RJ45 twisted-pair feeder etc.) or wireless mode (such as passing through Wi-Fi, bluetooth etc. connect);
Protocol adaptation module 413 is mainly used in the protocol conversion that takes charge of, mainly be that data in magnetic disk at USB interface reads agreement and the IP network agreement is carried out protocol conversion, this protocol adaptation module 413 can also further possess the mixed-media network modules mixed-media function, promptly can be used for setting up with discharge be connected, data check and error correction, repeating transmission control etc.;
Data memory module 414 is mainly used in the network video stream that buffer memory downloads in the process of download network video flowing, particularly network video stream is carried out normal decoder when playing during desired transmission rate when the transmission rate of the network video stream of video server feedback is lower than television set, connect 414 pairs of network video streams of data memory module carry out buffer memory can guarantee television set can be glibly to the network video stream broadcast of decoding;
Driver module 415 is core logic processing modules of connection device, is made up of a central processing unit (CPU) and a cover drive software usually.Driver module 415 is responsible for receiving the message that detection signal that television sets send and request obtain network video stream, and scheduling and drive above-mentioned usb interface module 411, Network Interface Module 412, protocol adaptation module 413, data memory module 414 operations.In the case of necessary, can in drive software, increase the subscription authentication function, this function is mainly used in after connection device is connected to video server, communicates by letter with video server with the affirmation user identity, and carries out necessary authentication, charging and log record etc.In addition, driver module can also be connected under the situation of network, and the Remote configuration administration interface is provided, to revise video server address and network settings etc.
In embodiments of the present invention, video server can be connected to local area network (LAN) or the Internet, provides service to the connection device described in many playscripts with stage directions inventive embodiments simultaneously.Video server itself can be a computer, mainly comprises local memory device, list of videos management software, the servo software of video.Wherein local memory device is used to preserve video file database and network video stream; The list of videos management software provides user interface, is used for the managing video listed files; The servo software of video is used to monitor corresponding port, provides to connection device to connect foundation and discharge, handle list request, processing file download request.When video file was configured to non-local file, video server was connected to the corresponding webserver by network, dynamically obtains network video stream and sends to connection device.Especially, video server also can be downloaded corresponding Internet video automatically and flow to this locality, is lower than the speed of video flowing broadcast request to avoid speed when sharing video source and obtain network video stream, guarantees the smooth playing of video flowing, also is convenient to repeat playing.
Based on applied environment as shown in Figure 4, the concrete application flow schematic diagram of the such scheme that the embodiment of the invention provides may further comprise the steps as shown in Figure 5:
Step 51, the user selects the USB input by television set interactive module (remote controller or control panel);
Step 52, television set to the connection device power supply, sends data read request (this data read request is used for acquisition request video file identification list) by usb interface module 411 simultaneously;
Step 53, connection device is started working, and starts Network Interface Module 412 to connect with video server;
Step 54 is set up failure if connect, and then execution in step 55, otherwise, execution in step 56;
Step 55, connection device returns empty video file identification list by usb interface module 411 to television set, and flow process finishes;
Step 56, connection device sends the request of video file identification list to video server, especially, can add step here and carry out authentification of user, basic step is: connection device is at unique user identifier of this locality storage and authentication string, after connecting with video server, user identifier and authentication string are sent list request as parameter to video server, video server is checked this user validation, and carry out necessary charging or journalizing, if authentification failure then return empty video file identification list, in this step 56, can suppose that video server detects the user and is validated user, the then follow-up execution in step 57 that can continue;
Step 57, video server returns to connection device with the video file identification list, and connection device returns the video file identification list to television set by usb interface module 411 again, and television set shows this video file identification list;
Step 58, judge that the user chooses certain video file identification list and selects broadcast by television set interactive module (remote controller or control panel) from the video file identification list of connection device feedback, judged result is when being, execution in step 59, and if judging the video file identification list that the user chooses does not also exist, then execution in step 56;
Step 59, television set sends the message that request obtains network video stream to connection device;
Step 510, connection device is transmitted the message that this request obtains network video stream to video server;
Step 511, video server judge that whether the network video stream that the connection device request obtains is kept on the home server, is judged as when being, download the local network video stream of preserving and send to connection device, and further execution in step 514, when being judged as not, execution in step 512;
Step 512, video server is from the network video stream memory address and the corresponding relation of network video stream of storage in advance, determine the corresponding memory address of network video stream with connection device request acquisition, and this memory address fed back to connection device, then connection device is connected to the indicated server of this memory address automatically;
Step 513, judge whether connection device successfully is connected to the indicated server of above-mentioned memory address, in judged result for not the time, then connection device sends an Indication message to television set, after television set is received this message, reminds user's connection failure, turn back to list menu, further execution in step 58 then, and in judged result when being, execution in step 514;
Step 514, connection device download network video flowing, and be cached in the data memory module 414;
Step 515 in the time of connection device download network video flowing, is play code check according to the decoding of television set, sends network video stream to television set;
Step 516, television set is decoded to the network video stream that receives, convert network video stream to video and voice data after, video and voice data are play;
Step 517, when the user finish to play by the television set request, connection device was closed and being connected of server, and the network video stream of buffer memory in the data memory module 414 is deleted, and flow process finishes.
Compared with prior art, the such scheme that the embodiment of the invention provides is by the characteristics of unlimited storage in the Internet and the quick transmission of data, utilize the video decode function that television set provides for oneself and storage, the signal processing function of the network equipment (personal computer), between the television set and the network equipment, add a connection device and realize assisting television set to realize obtaining and playing network video stream.With respect to the set-top box or the expensive television set that possesses the Internet connection function of function complexity, the such scheme that the embodiment of the invention provides possesses following beneficial effect:
The connection device function is simple, and decoding function is finished by television set, does not need decoding chip, and cost is low, and the volume of connection device can be accomplished very little;
Connection device can be powered by USB interface by television set, does not need power module;
Household digital television set and wireless network are more and more universal, and except connection device, the environment of building the described scheme of the embodiment of the invention does not need extra cost and equipment, and is very convenient, simple, quick;
Video server can be built in LAN environment, can directly read the local network video flowing or download network video stream from the Internet, simultaneously can also classify and puts in order network video stream, conveniently browses and plays; In addition, video server also can be built at common network (internet environment), is provided at IP signal on the common network by TV station, the program of the platform that also can teleview in real time broadcasting;
Because network video stream is not stored on connection device or the television set, but dynamically obtains from video server, therefore, network video stream can dynamically increase, and has increased user's selection face;
Decode by the digit chip that television set self is built-in, therefore be decoded in this process of broadcast and do not have dropout, image that plays out and sound quality height;
Video server can provide listed files and download service to a plurality of connection devices simultaneously, thereby reduces the construction cost of whole system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. the player method of a network video stream is characterized in that, comprising:
The connection device that does not possess the decoding video stream function receives the message of the request acquisition network video stream of television set transmission; And
Described message is sent to video server in the Internet; And
Receive the network video stream corresponding of described video server feedback, and the network video stream that receives is sent to the television set broadcast of decoding with described message.
2. the method for claim 1 is characterized in that, described message comprises the video file sign that television set is chosen from the video file identification list; And
Described connection device also comprises before receiving described message:
After described connection device receives the detection signal that television set sends, return the identification information of connection device, and obtain the video file identification list from described video server to television set; And
When receiving the identification information of the described connection device that television set chooses and send, described video file identification list is sent to described television set.
3. the method for claim 1, it is characterized in that, described connection device is connected with television set by the USB interface of television set, obtains the required electric weight of the described connection device of operation by described USB interface, and receives the described message that television set sends by described USB interface.
4. method as claimed in claim 3 is characterized in that, the network video stream corresponding with described message of described feedback is the network video stream of IP based network protocol encapsulation; And
Described connection device sends to the television set broadcast of decoding with the network video stream that receives, and specifically comprises:
Described connection device carries out decapsulation according to the IP network agreement to the network video stream of encapsulation, and after USB interface-based data in magnetic disk reads the network video stream of agreement after to decapsulation and encapsulate, and sends to the television set broadcast of decoding.
5. as the arbitrary described method of claim 1～4, it is characterized in that, when receiving described network video stream, described network video stream is stored in the buffer zone; And
Described network video stream is sent to the television set broadcast of decoding, is specially:
According to the decoding code check of television set, send to the television set broadcast of decoding with being stored in described network video stream in the buffer zone.
6. a connection device is characterized in that, described connection device does not possess the decoding video stream function, and described connection device specifically comprises:
The message sink unit is used to receive the message that request that television set sends obtains network video stream;
Message sending unit is used for the described message that the message sink unit receives is sent to the video server of the Internet;
The network video stream receiving element, the corresponding network video stream of described message that sends with message sending unit that is used to receive described video server feedback;
Transmitting element is used for the network video stream that the network video stream receiving element receives is sent to the television set broadcast of decoding.
7. equipment as claimed in claim 6 is characterized in that, described message comprises the video file sign that television set is chosen from the video file identification list; And described connection device also comprises:
The tabulation acquiring unit is used for before the message sink unit receives described message, after receiving the detection signal that television set sends, returns the identification information of connection device to television set, and obtains the video file identification list from described video server;
The tabulation transmitting element is used for when receiving the identification information of the described connection device that television set chooses and send, and the video file identification list that the tabulation acquiring unit is obtained sends to described television set.
8. equipment as claimed in claim 6, it is characterized in that, described connection device is connected with television set by the USB interface of television set, obtain the required electric weight of the described connection device of operation by described USB interface, and the message sink unit specifically is used to receive the described message that television set sends by described USB interface.
9. equipment as claimed in claim 8 is characterized in that, the network video stream corresponding with described message of described feedback is the network video stream of IP based network protocol encapsulation; And
Described transmitting element specifically is used for according to the IP network agreement network video stream of encapsulation being carried out decapsulation, and after USB interface-based data in magnetic disk reads the network video stream of agreement after to decapsulation and encapsulate, and sends to the television set broadcast of decoding.
10. as the arbitrary described equipment of claim 6～9, it is characterized in that, also comprise:
Buffer unit is used for when the network video stream receiving element receives described network video stream, and the described network video stream that the network video stream receiving element is received is stored in the buffer zone; And
Described transmitting element specifically is used for the decoding code check according to television set, buffer unit is stored in described network video stream in the buffer zone sends to the television set broadcast of decoding.
CN2010102942381A 2010-09-26 2010-09-26 Network video stream playing method and connecting equipment Pending CN101964902A (en)

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CN105898492A (en) * 2015-11-27 2016-08-24 乐视致新电子科技（天津）有限公司 Intelligent television USB data receiving interface and method

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Application publication date: 20110202