CN102098563A - Interactive digital television system and method as well as digital television receiving terminal and client - Google Patents
Interactive digital television system and method as well as digital television receiving terminal and client Download PDFInfo
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- CN102098563A CN102098563A CN 201110043767 CN201110043767A CN102098563A CN 102098563 A CN102098563 A CN 102098563A CN 201110043767 CN201110043767 CN 201110043767 CN 201110043767 A CN201110043767 A CN 201110043767A CN 102098563 A CN102098563 A CN 102098563A
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Abstract
The invention provides an interactive method of a digital television system. In the method, a network connection module is used for allocating address information for M digital media clients and building a wireless local area network (WLAN) link; a first digital media service module is used for sending a digital living network alliance (DLNA) application catalog containing a program list to the M digital media clients; and the first digital media service module is used for outputting an autoplay command with program information to any one idle demodulation module among N demodulation modules, controlling any one of idle demodulation modules to demodulate signals on frequency points corresponding to the program information, generating a play response, carrying out media format conversion on demodulated audio/video (AV) stream, and outputting the play response and the AV streams which are subjected to media format conversion to the corresponding digital media clients. The invention also provides an interactive digital television system, a digital television receiving terminal and a digital media client. The method and the devices provided by the invention are utilized to provide the programs required by multiple users in the WLAN, thus improving the instantaneity.
Description
Technical field
The present invention relates to the digital television techniques field, the interactive approach of particularly a kind of interactive digital television system, digital television system, receiving terminal for digital television and Digital Media client.
Background technology
Digital TV set-top box is a kind of conversion equipment that digital television signal is converted to analog signal, such as set-top box (Set-Top Box, STB), its sends being reduced into analog signal through image of digitalization compressed and voice signal decoding into common television set, and digital signal can be via satellite, wired or wireless broadcasting transmits.
At present, TV tech has realized under the situation that simulated television transforms fully to Digital Television, every television set all needs to be equipped with a digital TV set-top box, and existing digital TV set-top box has only a tuner (Tuner) usually, and the same time can only be decoded and be play a channel program.If the user needs different location at home, the same time is watched the program that it is required, just needs configuration a plurality of device and many digital TV set-top box that can broadcast program, and need pay many parts of watching authorization expenses, has improved use cost.
Fig. 1 is the structural representation of existing digital TV set-top box.Now in conjunction with Fig. 1, the structure of existing digital TV set-top box is described, specific as follows:
Existing digital TV set-top box comprises: casing, the main control chip 1 that is arranged at casing inside, casing surface are provided with the control panel 2 that is connected with main control chip 1, the flash memories module 11, buffer module 12, demodulation module 13 and the data output interface 14 that are connected with main control chip 1 data.Wherein, flash memories module 11 is used to deposit and working procedure; Cushioning effect when 12 of buffer module play program running; Demodulation module 13 is used for output intermediate-freuqncy signal IF is input to main control chip 1; Data output interface 14 is connected with the most frequent use of user or topmost television set, normally watches the audio-video signal of program so that this television set to be provided; Video wireless transmitter module 15 and audio wireless transmitter module 16 are connected with main control chip 1 respectively, are sent to the receiving equipment that disposes corresponding receiver module in order to TV or broadcast singal with decoded same frequency.
According to foregoing as can be known, though existing digital TV set-top box can be passed through video wireless transmitter module and audio wireless transmitter module, realize that a plurality of receiving equipments receive the TV or the broadcast singal of same frequency by a digital TV set-top box, but, existing digital TV set-top box can not realize TV or the broadcast singal of same time of a plurality of receiving equipments by a digital TV set-top box reception different frequent points, can't satisfy client's broadcast demand.Existing digital TV set-top box is still waiting to improve aspect real-time, further satisfies client's experience.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of interactive approach of digital television system, this method can improve real-time simultaneously for intrasystem a plurality of users provide its required program.
The object of the present invention is to provide a kind of interactive digital television system, this system can improve real-time simultaneously for these intrasystem a plurality of users provide its required program.
The object of the present invention is to provide a kind of receiving terminal for digital television, this receiving terminal for digital television can improve real-time simultaneously for a plurality of users in the WLAN (wireless local area network) provide its required program.
The object of the present invention is to provide a kind of Digital Media client, this client can be obtained its required program from receiving terminal for digital television, realizes the real-time broadcast to program.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of interactive approach of digital television system, this method comprises:
The network connecting module of A, receiving terminal for digital television is that M digital media client distributes address information, sets up WLAN (wireless local area network) with M digital media client and links;
The first digital media service module of B, receiving terminal for digital television issues the DLNA that comprises programme and uses catalogue to M digital media client by network connecting module;
That the first digital media service module of C, receiving terminal for digital television receives is that the networking link block is transmitted, from the address information of M digital media client and carry the play instruction of programme information, the demodulation module of the play instruction that programme information is carried in output arbitrary free time to N the demodulation module of receiving terminal for digital television, the demodulation module of controlling described arbitrary free time carries out demodulation to the signal on the programme information frequency points corresponding; Generate the broadcast response according to the audio/video flow after the demodulation, and the audio/video flow after the demodulation is carried out media format conversion;
The first digital media service module of D, receiving terminal for digital television is according to address information, and by network connecting module, the audio/video flow after output broadcast response and the media format conversion is to the corresponding digital media client.
Preferably, further comprise after the described step D:
The first digital media service module of receiving terminal for digital television further receive transmit by network connecting module, from the play instruction that stops that carrying programme information of M digital media client, output demodulation END instruction is to the demodulation module corresponding with programme information, further controls described demodulation module and stops demodulation to signal.
In the said method, described step B comprises:
The first digital media service module of receiving terminal for digital television is after startup, in DLNA application catalogue, set up the television services menu, the programme of demodulation module output is added into described television services menu, and issues DLNA application catalogue to described M digital media client by network connecting module.
In the said method, described step D comprises:
The first digital media service module of receiving terminal for digital television generates and comprises the SDP information of playing response, according to address information, send SDP information to the corresponding digital media client, and the audio/video flow after the media format conversion exported to and the address information corresponding port, make corresponding Digital Media client after receiving described SDP information, obtain audio/video flow after the media format conversion from the address information corresponding port.
A kind of interactive digital television system, this system comprises: receiving terminal for digital television and M digital media client, described receiving terminal for digital television comprises network connecting module, the first digital media service module and N demodulation module; Described M is the integer greater than 1, and described N is greater than 1 and smaller or equal to the integer of M;
Described M digital media client sends the request of connecting to described network connecting module, obtains its address information from described network connecting module; From the DLNA application catalogue that described network connecting module issues, obtain programme; Arbitrary Digital Media client in described M the digital media client sends the play instruction that carries programme information and address information to described network connecting module; According to address information, receive to play the audio/video flow after response and the media format conversion, and to the broadcast of decoding of the audio/video flow after the media format conversion;
Described network connecting module is according to the request of connecting, and for described M digital media client distributes address information, OPADD information is set up the WLAN (wireless local area network) link to described M digital media client; Be used for the mutual of instruction and data between described first digital media service module and described M the digital media client;
The DLNA that described first digital media service module output comprises programme uses catalogue to described network connecting module; According to the address information that receives and carry the play instruction of programme information, the demodulation module of the play instruction that programme information is carried in output arbitrary free time to the described N demodulation module; Generate the broadcast response according to the audio/video flow after the demodulation, and the audio/video flow of described N demodulation module output is carried out media format conversion; Audio/video flow after OPADD information, broadcast response and the media format conversion is to described network connecting module;
A described N demodulation module carries out demodulation to the programme of digital TV front-end system output, and the programme after the output demodulation is to the described first digital media service module; The demodulation module of arbitrary free time carries out demodulation according to the play instruction that carries programme information to the signal on the programme information frequency points corresponding in the described N demodulation module, and audio/video flow that the output demodulation obtains and broadcast response are to the first digital media service module.
In the said system, described M digital media client further send carry programme information stop play instruction to described network connecting module;
The described first digital media service module is further according to the play instruction that stops that carrying programme information that receives, and output demodulation END instruction is to the demodulation module corresponding with programme information;
The described demodulation module corresponding with programme information stops the demodulation to signal further according to the demodulation END instruction.
In the said system, described network connecting module comprises:
DynamicHost is provided with the protocol DHCP server, is used to described M digital media client to distribute address information;
The first wireless connections unit according to the connecting request that the digital media client of described M sends, obtains address information and issues from described Dynamic Host Configuration Protocol server, set up WLAN (wireless local area network) with the individual digital media client of described M and link;
Network exchange module, the DLNA application catalogue with described first digital media service module output by the described first wireless connections unit, is handed down to described M digital media client; With play instruction that carries programme information and the address information described first wireless connections unit forwards, a described M digital media client transmission, export the described first digital media service module to; According to address information,, be sent to the corresponding digital media client by the described first wireless connections unit with the broadcast response of described first digital media service module output and the audio/video flow after the media format conversion.
In the said system, arbitrary Digital Media client comprises in described M the digital media client:
The second wireless connections unit, the request of will connecting sends to described network connecting module; With receive address information export the second digital media service module to; The DLNA that receives is used catalogue export the second digital media service module to; Address information that receives and the play instruction that carries programme information are sent to described network connecting module; Export the broadcast response that receives to second digital media service module;
The second digital media service module behind the Digital Media client terminal start-up, sends the request of connecting to the second wireless connections unit; Receive the address information that network connecting module sends; Use selection television services menu the catalogue from the DLNA that receives,, from the television services menu, obtain programme according to http protocol; OPADD information and the play instruction that carries programme information are to the described second wireless connections unit; According to playing response, the audio/video flow on the address information corresponding port after the receiving media format conversion, and the broadcast of decoding.
A kind of receiving terminal for digital television, this receiving terminal for digital television comprises:
Network connecting module is used to M digital media client to distribute address information, sets up WLAN (wireless local area network) with M digital media client and links; Be used for the mutual of instruction and data between the first digital media service module and M the digital media client; Described M is the integer greater than 1;
The first digital media service module, the DLNA that will comprise programme uses catalogue and exports network connecting module to; According to the address information that receives and carry the play instruction of programme information, the demodulation module of the play instruction that output carries programme information arbitrary free time to N the demodulation module; Generate the broadcast response according to the audio/video flow after the demodulation, and the audio/video flow of N demodulation module output is carried out media format conversion; Audio/video flow after OPADD information, broadcast response and the media format conversion is to network connecting module;
N demodulation module, the programme that the digital TV front-end system is exported carries out demodulation, programme to the first digital media service module after the output demodulation; The demodulation module of arbitrary free time carries out demodulation according to the play instruction that carries programme information to the signal on the programme information frequency points corresponding in the described N demodulation module, audio/video flow to the first digital media service module after the output demodulation; Described N is greater than 1 and smaller or equal to the integer of M.
Preferably, the described first digital media service module is further according to the play instruction that stops that carrying programme information that receives, and output demodulation END instruction is to the demodulation module corresponding with programme information;
The described demodulation module corresponding with programme information stops the demodulation to signal further according to the demodulation END instruction.
In the above-mentioned receiving terminal for digital television, described network connecting module comprises:
DynamicHost is provided with the protocol DHCP server, is used to described M digital media client configuration address information;
The first wireless connections unit according to the connecting request that the digital media client of described M sends, obtains address information and issues from described Dynamic Host Configuration Protocol server, set up WLAN (wireless local area network) with the individual digital media client of described M and link;
Network exchange module, the DLNA application catalogue with described first digital media service module output by the described first wireless connections unit, is handed down to described M digital media client; With play instruction that carries programme information and the address information described first wireless connections unit forwards, a described M digital media client transmission, export the described first digital media service module to; According to address information,, be sent to the corresponding digital media client by the described first wireless connections unit with the broadcast response of described first digital media service module output and the audio/video flow after the media format conversion.
A kind of Digital Media client, this client comprises:
The second wireless connections unit, the request of will connecting sends to receiving terminal for digital television; With receive address information export the second digital media service module to; The DLNA that receives is used catalogue export the second digital media service module to; Address information that receives and the play instruction that carries programme information are sent to described receiving terminal for digital television; Export the broadcast response that receives to second digital media service module;
The second digital media service module behind the Digital Media client terminal start-up, sends the request of connecting to the second wireless connections unit; Receive the address information that described receiving terminal for digital television sends; Use selection television services menu the catalogue from the DLNA that receives,, from the television services menu, obtain programme according to http protocol; OPADD information and the play instruction that carries programme information are to the described second wireless connections unit; According to playing response, the audio/video flow on the address information corresponding port after the receiving media format conversion, and the broadcast of decoding.
As seen from the above technical solutions, a kind of interactive digital television system of the present invention, interactive approach, receiving terminal for digital television and Digital Media client, network connecting module is set up WLAN (wireless local area network) with M digital media client and is linked, the first digital media service module is according to the play instruction of arbitrary Digital Media client, the idle demodulation module of control carries out demodulation, and the audio/video flow after the demodulation carried out media format conversion, issue audio/video flow after the media format conversion to corresponding media client by WLAN (wireless local area network), so that corresponding media client is to the audio/video flow broadcast of decoding.Adopt receiving terminal for digital television of the present invention, client, system and method, the program of its required different frequent points can be provided for a plurality of users simultaneously, improved real-time.
Description of drawings
Fig. 1 is the structural representation of existing digital TV set-top box;
Fig. 2 is the structural representation of interactive digital television system of the present invention;
Fig. 3 is the interactive approach flow chart of digital television system of the present invention.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Receiving terminal for digital television of the present invention is that existing digital TV set-top box is improved, the first digital media service module that receiving terminal for digital television of the present invention comprises is that the main control chip to existing digital TV set-top box shown in Figure 1 improves, and has increased the function of media format conversion and N demodulation module of control; The network connecting module that receiving terminal for digital television of the present invention comprises is that video wireless transmitter module, audio wireless transmitter module and the data output interface to existing digital TV set-top box shown in Figure 1 improves.The control panel that receiving terminal for digital television of the present invention comprises for existing digital TV set-top box shown in Figure 1, buffer module and flash memories module are improved, and no longer give unnecessary details.
Fig. 2 is the structural representation of interactive digital television system of the present invention.Now in conjunction with Fig. 2, the structure of interactive digital television system of the present invention is described, specific as follows:
Interactive digital television system of the present invention is connected with existing digital TV front-end system (not shown among Fig. 2), comprising: receiving terminal for digital television 20, the first Digital Media client 21 ... and M Digital Media client 22.Wherein, receiving terminal for digital television 20 comprise network connecting module 201, the first digital media service module 202, first demodulation module 203 ... and N demodulation module 204.Wherein, M is the integer greater than 1, and N is greater than 1 and smaller or equal to the integer of M.
Arbitrary Digital Media client sends to connect and asks to obtain its address information to network connecting module 201 from network connecting module 201 in M the digital media client.Concrete, M digital media client can utilize existing DLNA (Digital Living Network Alliance) standard, after startup, automatically whether search exists wireless network, and determining to exist under the situation of wireless network, transmission connects and asks to network connecting module 201, to obtain address information.Wherein, address information can be the IP address.
M digital media client obtains programme from the DLNA application catalogue that network connecting module 201 issues.Particularly, M digital media client opened Digital Media controller (the Digital Living Network Alliance-Digital Media Controller that supports DLNA, DLNA-DMC) after the application program, can open the DLNA that obtains from the address information corresponding port and use catalogue, therefrom select the television services menu and open.After opening, M digital media client uses HTML (Hypertext Markup Language), and (Hyper Text Transfer Protocol, HTTP) agreement is obtained programme from the television services menu.
Arbitrary Digital Media client is according to the programme that obtains in M the digital media client, pass through WLAN (wireless local area network), transmission is carried the play instruction of programme information and address information to network connecting module 201, according to address information, receive to play the audio/video flow after response and the media format conversion, and to the broadcast of decoding of the audio/video flow after the media format conversion.Particularly, M digital media client play instruction that sends and the broadcast that receives respond the regulation that all meets http protocol; M digital media client obtained by http protocol play response after, according to address information, from obtaining audio/video flow after the media format conversion with the address information corresponding port; Audio/video flow after the media format conversion meets real time transport protocol (Real-time Transport Protocol, RTP) form.Digital Media of the present invention client can be terminals such as PC with digital media service function or mobile phone.
The network connecting module 201 of receiving terminal for digital television 20 is according to the request of connecting, and for M digital media client distributes address information, OPADD information is set up the WLAN (wireless local area network) link to M digital media client.Network connecting module 201 is used for the mutual of instruction and data between the first digital media service module 202 of receiving terminal for digital television 20 and M the digital media client.Networking link block 201 can adopt existing DLNA standard to carry out the mutual of instruction and data.
The DLNA that the first digital media service module, 202 outputs of receiving terminal for digital television 20 comprise programme uses catalogue to network connecting module 201; According to the address information that receives and carry the play instruction of programme information, the demodulation module of the play instruction that programme information is carried in output arbitrary free time to N the demodulation module; Audio/video flow to N demodulation module output carries out media format conversion, and the audio/video flow after OPADD information, broadcast response and the media format conversion is to network connecting module 201.
Particularly, the first digital media service module 202 of receiving terminal for digital television 20 is used in the catalogue at DLNA and is set up the television services menu, and according to http protocol, the programme that the demodulation module that receives is exported is added in the television services menu; Pass through http protocol, address information that reception network connecting module 201 is transmitted and the play instruction that carries programme information, the demodulation module of the play instruction that programme information is carried in output arbitrary free time to N the demodulation module carries out demodulation to control this idle demodulation module to the signal on the programme information frequency points corresponding; During the audio/video flow of the first digital media service module 202 after receiving demodulation, generate and comprise the Session Description Protocol of playing response (Session Description Protocol, SDP) information and audio/video flow carried out media format conversion; According to http protocol, sending broadcast by network connecting module 201 responds to the corresponding digital media client, and the audio/video flow after the output medium format conversion is to the address information corresponding port, so that the audio/video flow after the corresponding digital media client receiving media format conversion.
N demodulation module carries out demodulation to the programme that the digital TV front-end system exports, programme to the first digital media service module 202 after the output demodulation.Concrete, the demodulation module of arbitrary free time carries out demodulation according to the play instruction that carries programme information to the signal on the programme information frequency points corresponding in N demodulation module, exports audio/video flow to the first digital media service module 202 after the demodulation.
In order to realize interactive VOD better, in M digital media client arbitrary Digital Media client further send carry programme information stop play instruction to described network connecting module 201; This stops the regulation that play instruction meets http protocol.The play instruction that stops that carrying programme information that the first digital media service module 202 is further transmitted according to network connecting module 201, output demodulation END instruction be to the demodulation module corresponding with programme information, stops demodulation to signal to control this demodulation module.
Wherein, network connecting module 201 comprises: the first wireless connections unit 2011, DynamicHost are provided with protocol DHCP server 2012 and network exchange unit 2013.
Dynamic Host Configuration Protocol server 2012 is used for the request of connecting according to 2011 forwardings of the first wireless connections unit, is that M digital media client distributes address information.
The first wireless connections unit 2011 is according to the connecting request that the digital media client of M sends, and obtains address information and issue from Dynamic Host Configuration Protocol server 2012, sets up WLAN (wireless local area network) with the individual digital media client of described M and links.Wherein, the first wireless connections unit 2011 can adopt existing module with wireless transmission and receiving function; Above-mentioned wireless transmission and receiving function can be bluetooth, WIFI, frequency modulation emission or microwave emission etc.
Network exchange unit 2013 is used catalogue with the DLNA of the first digital media service module, 202 outputs, by the first wireless connections unit 2011, is handed down to M digital media client; The first wireless connections unit 2011 is transmitted, from the play instruction and the address information of M digital media client, export the first digital media service module 202 to; According to address information,, be sent to the corresponding digital media client by the described first wireless connections unit with the broadcast response of described first digital media service module output and the audio/video flow after the media format conversion.Instruction and data fit http protocol that network exchange module is transmitted.
Wherein, arbitrary Digital Media client comprises the second wireless connections unit 211 and the second digital media service module 212 in M the digital media client, such as: the first Digital Media client 21 comprises the second wireless connections unit 211 and the second digital media service module 212; M Digital Media client 22 comprises the second wireless connections unit 211 and the second digital media service module 212.
The request of will connecting of the second wireless connections unit 211 sends to described network connecting module 201; With receive address information export the second digital media service module 212 to; The DLNA that receives is used catalogue export the second digital media service module 212 to; Address information that receives and the play instruction that carries programme information are sent to network connecting module 201; Export the broadcast response that receives to second digital media service module 212.The second wireless connections unit 211 can adopt the module identical with the first wireless connections unit 2011, does not repeat them here.
Behind the Digital Media client terminal start-up of the second digital media service module 212 under it, send the request of connecting to the second wireless connections unit 211; Receive the address information that network connecting module 201 issues; After starting the DLNA-DMC application program, open the DLNA that obtains from the address information corresponding port and use catalogue, therefrom select the television services menu and open, use http protocol from the television services menu, to obtain programme.The second digital media service module, 212 OPADD information and carry play instruction to the second wireless connections unit 211 of programme information; According to playing response, the audio/video flow on the address information corresponding port after the receiving media format conversion, and the broadcast of decoding.
Fig. 3 is the interactive approach flow chart of digital television system of the present invention.Method shown in Figure 3 is that system shown in Figure 2 is carried out interactive method, and is existing in conjunction with Fig. 3, and the interactive approach of digital television system of the present invention is described, specific as follows:
Step 301: arbitrary Digital Media client sends to connect and asks to network connecting module;
Arbitrary Digital Media client in the individual digital media client of M can be utilized existing DLNA standard, behind this Digital Media client terminal start-up, automatically whether search exists wireless network, and determining to exist under the situation of wireless network, sending connects asks network connecting module 201 to receiving terminal for digital television 20.
Step 302: network connecting module sends address information to the corresponding digital media client;
Network connecting module for the Digital Media client that this request is corresponding is distributed address information, and sends address information to the corresponding digital media client according to the request of connecting.Wherein, address information can be the IP address.
Step 303: idle demodulation module output programme to the first digital media service module;
After receiving terminal for digital television 20 started, the demodulation module of arbitrary free time can carry out demodulation to the programme that the digital TV front-end system provides, programme to the first digital media service module 202 after the output demodulation.
Step 304: the DLNA that the output of the first digital media service module comprises programme uses catalogue to network connecting module;
The first digital media service module 202 of receiving terminal for digital television 20 is used in the catalogue at DLNA and is set up the television services menu, according to http protocol, the programme that receives is added into the television services menu, and the DLNA that output comprises programme uses catalogue to network connecting module 201.
The first digital media service module 202 and network connecting module 201 are all supported the DLNA agreement, after network connecting module 201 has been set up the WLAN (wireless local area network) link, the first digital media service module 202 detects according to the DLNA agreement and has set up the WLAN (wireless local area network) link, then is triggered to carry out this step.
Step 305: network connecting module sends the DLNA that comprises programme and uses catalogue to arbitrary Digital Media client;
The DLNA that network connecting module 201 will comprise programme uses catalogue, is sent to the arbitrary Digital Media client in the WLAN (wireless local area network).
Step 306: the play instruction that arbitrary Digital Media client sends address information and carries programme information is to network connecting module;
Arbitrary Digital Media client in the individual digital media client of M is after opening the DLNA-DMC application program, open the DLNA that obtains from the address information corresponding port and use catalogue, therefrom select the television services menu and open, use http protocol from the television services menu, to obtain programme.
Arbitrary Digital Media client is by http protocol, and the play instruction that sends address information and carry programme information is to network connecting module 201.
Step 307: network connecting module OPADD information and play instruction to the first digital media service module of carrying programme information;
The instruction and data that the network connecting module 201 and the first digital media service module are 202 meet the DLNA standard alternately.
Step 308: the output of the first digital media service module is carried the play instruction of programme information to idle demodulation module;
The first digital media service module 202 is according to address information that receives and the play instruction that carries programme information, from N demodulation module, select the demodulation module of a free time, output is carried the play instruction of programme information to idle demodulation module, to control idle demodulation module the signal on the programme information frequency points corresponding is carried out demodulation.
Step 309: audio/video flow to the first digital media service module after the idle demodulation module output demodulation;
Idle demodulation module carries out demodulation according to the play instruction that receives to the signal on the programme information frequency points corresponding, audio/video flow to the first digital media service module 202 after the output demodulation.
Step 310: the first digital media service module generates to be play response and carries out media format conversion;
During the audio/video flow of the first digital media service module 202 after receiving demodulation, generate and comprise the SDP information of playing response, and audio/video flow is carried out media format conversion.Wherein, media format conversion is the method for the media formats that the audio/video flow after the demodulation is converted to the Digital Media client and supports, such as, the audio/video flow after the demodulation is converted to the method for RTP form.
Step 311: the audio/video flow after the first digital media service module OPADD information, broadcast response and the media format conversion is to network connecting module;
The first digital media service module 202 exports the information of network connecting module 201 and the regulation that instruction meets http protocol to.
Step 312: the audio/video flow after network connecting module transmission broadcast response and the media format conversion is to the corresponding digital media client;
Network connecting module 201 sends by http protocol and plays response, and the audio/video flow after the media format conversion is exported on the address information corresponding port, so that the corresponding digital media client obtains.
Step 313: arbitrary Digital Media client is according to playing response, to the broadcast of decoding of the audio/video flow after the media format conversion;
M digital media client obtained by http protocol play response after, according to address information, from obtaining audio/video flow after the media format conversion, and to the broadcast of decoding of the audio/video flow after the media format conversion with the address information corresponding port.
Step 314: arbitrary Digital Media client send carry programme information stop play instruction to network connecting module;
Step 315: what programme information was carried in network connecting module output stops play instruction to the first digital media service module;
Step 316: first digital media service module output demodulation END instruction is to corresponding demodulation module.
The first digital media service module 202 is determined corresponding demodulation module according to programme information, and according to stopping play instruction, output demodulation END instruction is to corresponding demodulation module, stops demodulation to signal to control corresponding demodulation module.
In the above-mentioned preferred embodiment of the present invention, in receiving terminal for digital television, installed the first digital media service module of supporting the DLNA standard, network connecting module and a plurality of demodulation module, the first digital media service module of supporting the DLNA standard and the second wireless connections unit in terminal, have been installed as the Digital Media client, realize of reception and the broadcast of the interior a plurality of Digital Medias client of family lan to Digital Television, and receiving terminal for digital television of the present invention can utilize the demodulation module that is in idle condition, simultaneously the playing request of a plurality of Digital Medias client is handled, improve real-time, and further reduced use cost.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the interactive approach of a digital television system is characterized in that, this method comprises:
The network connecting module of A, receiving terminal for digital television is that M digital media client distributes address information, sets up WLAN (wireless local area network) with M digital media client and links;
The first digital media service module of B, receiving terminal for digital television issues the DLNA that comprises programme and uses catalogue to M digital media client by network connecting module;
That the first digital media service module of C, receiving terminal for digital television receives is that the networking link block is transmitted, from the address information of M digital media client and carry the play instruction of programme information, the demodulation module of the play instruction that programme information is carried in output arbitrary free time to N the demodulation module of receiving terminal for digital television, the demodulation module of controlling described arbitrary free time carries out demodulation to the signal on the programme information frequency points corresponding; Generate the broadcast response according to the audio/video flow after the demodulation, and the audio/video flow after the demodulation is carried out media format conversion;
The first digital media service module of D, receiving terminal for digital television is according to address information, and by network connecting module, the audio/video flow after output broadcast response and the media format conversion is to the corresponding digital media client.
2. method according to claim 1 is characterized in that, further comprises after the described step D:
The first digital media service module of receiving terminal for digital television further receive transmit by network connecting module, from the play instruction that stops that carrying programme information of M digital media client, output demodulation END instruction is to the demodulation module corresponding with programme information, further controls described demodulation module and stops demodulation to signal.
3. method according to claim 1 and 2 is characterized in that, described step B comprises:
The first digital media service module of receiving terminal for digital television is after startup, in DLNA application catalogue, set up the television services menu, the programme of demodulation module output is added into described television services menu, and issues DLNA application catalogue to described M digital media client by network connecting module.
4. method according to claim 1 and 2 is characterized in that, described step D comprises:
The first digital media service module of receiving terminal for digital television generates and comprises the SDP information of playing response, according to address information, send SDP information to the corresponding digital media client, and the audio/video flow after the media format conversion exported to and the address information corresponding port, make corresponding Digital Media client after receiving described SDP information, obtain audio/video flow after the media format conversion from the address information corresponding port.
5. an interactive digital television system is characterized in that, this system comprises: receiving terminal for digital television and M digital media client, and described receiving terminal for digital television comprises network connecting module, the first digital media service module and N demodulation module; Described M is the integer greater than 1, and described N is greater than 1 and smaller or equal to the integer of M;
Described M digital media client sends the request of connecting to described network connecting module, obtains its address information from described network connecting module; From the DLNA application catalogue that described network connecting module issues, obtain programme; Arbitrary Digital Media client in described M the digital media client sends the play instruction that carries programme information and address information to described network connecting module; According to address information, receive to play the audio/video flow after response and the media format conversion, and to the broadcast of decoding of the audio/video flow after the media format conversion;
Described network connecting module is according to the request of connecting, and for described M digital media client distributes address information, OPADD information is set up the WLAN (wireless local area network) link to described M digital media client; Be used for the mutual of instruction and data between described first digital media service module and described M the digital media client;
The DLNA that described first digital media service module output comprises programme uses catalogue to described network connecting module; According to the address information that receives and carry the play instruction of programme information, the demodulation module of the play instruction that programme information is carried in output arbitrary free time to the described N demodulation module; Generate the broadcast response according to the audio/video flow after the demodulation, and the audio/video flow of described N demodulation module output is carried out media format conversion; Audio/video flow after OPADD information, broadcast response and the media format conversion is to described network connecting module;
A described N demodulation module carries out demodulation to the programme of digital TV front-end system output, and the programme after the output demodulation is to the described first digital media service module; The demodulation module of arbitrary free time carries out demodulation according to the play instruction that carries programme information to the signal on the programme information frequency points corresponding in the described N demodulation module, and audio/video flow that the output demodulation obtains and broadcast response are to the first digital media service module.
6. system according to claim 5 is characterized in that,
Described M digital media client further send carry programme information stop play instruction to described network connecting module;
The described first digital media service module is further according to the play instruction that stops that carrying programme information that receives, and output demodulation END instruction is to the demodulation module corresponding with programme information;
The described demodulation module corresponding with programme information stops the demodulation to signal further according to the demodulation END instruction.
7. system according to claim 5 is characterized in that, described network connecting module comprises:
DynamicHost is provided with the protocol DHCP server, is used to described M digital media client to distribute address information;
The first wireless connections unit according to the connecting request that the digital media client of described M sends, obtains address information and issues from described Dynamic Host Configuration Protocol server, set up WLAN (wireless local area network) with the individual digital media client of described M and link;
Network exchange module, the DLNA application catalogue with described first digital media service module output by the described first wireless connections unit, is handed down to described M digital media client; With play instruction that carries programme information and the address information described first wireless connections unit forwards, a described M digital media client transmission, export the described first digital media service module to; According to address information,, be sent to the corresponding digital media client by the described first wireless connections unit with the broadcast response of described first digital media service module output and the audio/video flow after the media format conversion.
8. system according to claim 5 is characterized in that, arbitrary Digital Media client comprises in described M the digital media client:
The second wireless connections unit, the request of will connecting sends to described network connecting module; With receive address information export the second digital media service module to; The DLNA that receives is used catalogue export the second digital media service module to; Address information that receives and the play instruction that carries programme information are sent to described network connecting module; Export the broadcast response that receives to second digital media service module;
The second digital media service module behind the Digital Media client terminal start-up, sends the request of connecting to the second wireless connections unit; Receive the address information that network connecting module sends; Use selection television services menu the catalogue from the DLNA that receives,, from the television services menu, obtain programme according to http protocol; OPADD information and the play instruction that carries programme information are to the described second wireless connections unit; According to playing response, the audio/video flow on the address information corresponding port after the receiving media format conversion, and the broadcast of decoding.
9. a receiving terminal for digital television is characterized in that, this receiving terminal for digital television comprises:
Network connecting module is used to M digital media client to distribute address information, sets up WLAN (wireless local area network) with M digital media client and links; Be used for the mutual of instruction and data between the first digital media service module and M the digital media client; Described M is the integer greater than 1;
The first digital media service module, the DLNA that will comprise programme uses catalogue and exports network connecting module to; According to the address information that receives and carry the play instruction of programme information, the demodulation module of the play instruction that output carries programme information arbitrary free time to N the demodulation module; Generate the broadcast response according to the audio/video flow after the demodulation, and the audio/video flow of N demodulation module output is carried out media format conversion; Audio/video flow after OPADD information, broadcast response and the media format conversion is to network connecting module;
N demodulation module, the programme that the digital TV front-end system is exported carries out demodulation, programme to the first digital media service module after the output demodulation; The demodulation module of arbitrary free time carries out demodulation according to the play instruction that carries programme information to the signal on the programme information frequency points corresponding in the described N demodulation module, audio/video flow to the first digital media service module after the output demodulation; Described N is greater than 1 and smaller or equal to the integer of M.
10. receiving terminal for digital television according to claim 9 is characterized in that,
The described first digital media service module is further according to the play instruction that stops that carrying programme information that receives, and output demodulation END instruction is to the demodulation module corresponding with programme information;
The described demodulation module corresponding with programme information stops the demodulation to signal further according to the demodulation END instruction.
11. receiving terminal for digital television according to claim 9 is characterized in that, described network connecting module comprises:
DynamicHost is provided with the protocol DHCP server, is used to described M digital media client configuration address information;
The first wireless connections unit according to the connecting request that the digital media client of described M sends, obtains address information and issues from described Dynamic Host Configuration Protocol server, set up WLAN (wireless local area network) with the individual digital media client of described M and link;
Network exchange module, the DLNA application catalogue with described first digital media service module output by the described first wireless connections unit, is handed down to described M digital media client; With play instruction that carries programme information and the address information described first wireless connections unit forwards, a described M digital media client transmission, export the described first digital media service module to; According to address information,, be sent to the corresponding digital media client by the described first wireless connections unit with the broadcast response of described first digital media service module output and the audio/video flow after the media format conversion.
12. a Digital Media client is characterized in that, this client comprises:
The second wireless connections unit, the request of will connecting sends to receiving terminal for digital television; With receive address information export the second digital media service module to; The DLNA that receives is used catalogue export the second digital media service module to; Address information that receives and the play instruction that carries programme information are sent to described receiving terminal for digital television; Export the broadcast response that receives to second digital media service module;
The second digital media service module behind the Digital Media client terminal start-up, sends the request of connecting to the second wireless connections unit; Receive the address information that described receiving terminal for digital television sends; Use selection television services menu the catalogue from the DLNA that receives,, from the television services menu, obtain programme according to http protocol; OPADD information and the play instruction that carries programme information are to the described second wireless connections unit; According to playing response, the audio/video flow on the address information corresponding port after the receiving media format conversion, and the broadcast of decoding.
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| CN 201110043767 CN102098563A (en) | 2011-02-22 | 2011-02-22 | Interactive digital television system and method as well as digital television receiving terminal and client |
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| CN 201110043767 CN102098563A (en) | 2011-02-22 | 2011-02-22 | Interactive digital television system and method as well as digital television receiving terminal and client |
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Application publication date: 20110615 |