CN105282605A - Method, device and system for data transmission - Google Patents

Method, device and system for data transmission Download PDF

Info

Publication number
CN105282605A
CN105282605A CN201510658655.2A CN201510658655A CN105282605A CN 105282605 A CN105282605 A CN 105282605A CN 201510658655 A CN201510658655 A CN 201510658655A CN 105282605 A CN105282605 A CN 105282605A
Authority
CN
China
Prior art keywords
top box
set top
signal
control signal
audio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510658655.2A
Other languages
Chinese (zh)
Inventor
丁前利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Skyworth Digital Technology Co Ltd
Original Assignee
Shenzhen Skyworth Digital Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Skyworth Digital Technology Co Ltd filed Critical Shenzhen Skyworth Digital Technology Co Ltd
Priority to CN201510658655.2A priority Critical patent/CN105282605A/en
Publication of CN105282605A publication Critical patent/CN105282605A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation

Abstract

The invention discloses a method, a device and a system for data transmission. The method comprises: a first set top box modulates an audio-video signal to a first frequency band, modulates a control signal to a second frequency band, and transmits the modulated audio-video signal and control signal to a second set top box via a coaxial cable simultaneously, wherein the first frequency band and the second frequency band do not interfere with each other, and the control signal comprises a remote signal and/or CA authentication information; and the second set top box receives the modulated audio-video signal and control signal, demodulates the modulated control signal, and transmits the audio-video signal assigned by the control signal to a display device according to the control signal. Through the method, the set top boxes can be controlled by each other through the coaxial cable, signal transmission is stable, and the amount of transmitted information is large.

Description

A kind of data transmission method and device, system
Technical field
The present invention relates to field of data transmission, particularly a kind of data transmission method and device, system.
Background technology
There are multiple TV and Set Top Box in many families, and these TVs and Set Top Box are arranged on different rooms respectively, to facilitate family's different members viewing TV.But present many TV programme are not suitable for children's viewing, the channel that usual parents' meeting limiting child is watched, this Set Top Box that can watch TV by controlling children realizes.
At present, control between Set Top Box mainly adopts the mode of controlled in wireless, such as realized by infrared, bluetooth or WiFi, the method needs a prefabricated part in primary set-top box to control the coding of handset top box, when remote control trigger controls the button of handset top box, primary set-top box enters and controls handset top box pattern, and send audio frequency and video and control information and CA authorization message etc. by the mode of wireless transmission to handset top box, but the jitter of wireless transmission and transmission amount of information limited, the demand that user's high definition watches program can not be met.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of data transmission method and device, system, by being controlled mutually by coaxial line between the method Set Top Box, and stable signal transmission and transmission of information amount is large.
The invention provides a kind of data transmission method, comprising:
Audio-video signal is modulated to the first frequency range by the first Set Top Box, and control signal is modulated to the second frequency range, and wherein said first frequency range and described second frequency range do not interfere with each other, and described control signal comprises remote signal and/or CA authorization message;
Described audio-video signal after modulation and described control signal are transferred to the second Set Top Box by coaxial line by described first Set Top Box simultaneously.
Alternatively, described second frequency range that control signal is modulated to comprises:
By described control signal after anti-phase comparison circuit module processes, input first or door module with carrier signal simultaneously; The frequency range of described carrier signal is described second frequency range;
The signal that described first or door module export is processed through bandpass filtering modules block and amplification circuit module, obtains the described control signal after modulating.
Alternatively, audio-video signal is modulated to the first frequency range by described first Set Top Box, and also comprises before control signal is modulated to the second frequency range:
Described first Set Top Box sends control index signal by described coaxial line to described second Set Top Box, and described control index signal is used to indicate described first Set Top Box and controls the second Set Top Box;
Described first Set Top Box receives the feedback signal of the described control index signal that described second Set Top Box is sent by described coaxial line, and the feedback signal of described control index signal is the control index signal generation that described first Set Top Box received according to described second Set Top Box controls described second Set Top Box.
Alternatively, described first Set Top Box by coaxial line by modulation after described audio-video signal and described control signal be transferred to the second Set Top Box simultaneously after also comprise:
Described first Set Top Box sends heartbeat instruction by described coaxial line to the second Set Top Box, and described heartbeat instruction sends once every very first time threshold value;
Judge the feedback signal whether receiving the described heartbeat instruction that described second Set Top Box is sent by described coaxial line in the second time threshold, the feedback signal of described heartbeat instruction is the feedback signal that described second Set Top Box generates according to the heartbeat instruction that described first Set Top Box received sends, if not, then stop performing described first Set Top Box, by coaxial line, the described audio-video signal after modulation and described control signal are transferred to the second Set Top Box simultaneously.
Alternatively, the frequency of described first frequency range comprises 7MHZ-9MHZ; The frequency of described second frequency range comprises 400MHZ-900MHZ.
Alternatively, described first Set Top Box was also comprised before the second Set Top Box sends control index signal by described coaxial line:
Described first Set Top Box and described second Set Top Box connect;
Described first Set Top Box sends test link order by described coaxial line to described second Set Top Box, and described test link order comprises the chipID information of described first Set Top Box;
Judge whether described first Set Top Box receives the connection reception instruction of described second Set Top Box transmission in the 3rd time threshold, and described connection receives the chipID information that instruction comprises described second Set Top Box;
If, then described first Set Top Box is after receiving the first activation instruction, be configured according to described first activation instruction, described first activation instruction is for activating the data transmission device of described first Set Top Box, and described first activation instruction comprises the chipID information of described first Set Top Box.
A kind of data transmission device, described device comprises:
First modulating unit, for audio-video signal is modulated to the first frequency range,
Second modulating unit, for control signal is modulated to the second frequency range, wherein said first frequency range and described second frequency range do not interfere with each other, and described control signal comprises remote signal and/or CA authorization message;
First transmitting element, for being transferred to the second Set Top Box by coaxial line by the described audio-video signal after modulation and described control signal simultaneously.
Alternatively, described modulating unit comprises: anti-phase comparison circuit module, first or door module, bandpass filtering modules block and amplification circuit module, described modulating unit specifically for:
By described control signal after anti-phase comparison circuit module processes, input first or door module with carrier signal simultaneously; The frequency range of described carrier signal is described second frequency range;
The signal that described first or door module export is processed through bandpass filtering modules block and amplification circuit module, obtains the described control signal after modulating.
Alternatively, described first transmitting element is also for sending control index signal by described coaxial line to the second Set Top Box, and described control index signal is used to indicate described first Set Top Box and controls the second Set Top Box;
Described device also comprises,
First receiving element, for receiving the feedback signal of the described control index signal that described second Set Top Box is sent by described coaxial line, the feedback signal of described control index signal is the control index signal generation that described first Set Top Box received according to described second Set Top Box controls described second Set Top Box.
Alternatively, described first transmitting element is also for sending heartbeat instruction by described coaxial line to described second Set Top Box, and described heartbeat instruction sends once every very first time threshold value;
Described device also comprises,
Judging unit, for judging the feedback signal whether receiving the described heartbeat instruction that described second Set Top Box is sent by described coaxial line in the second time threshold, the feedback signal of described heartbeat instruction is the feedback signal that described second Set Top Box generates according to the heartbeat instruction that described first Set Top Box received sends, if not, then stop performing described first Set Top Box, by coaxial line, the described audio-video signal after modulation and described control signal are transferred to the second Set Top Box simultaneously.
Alternatively, the frequency of described first frequency range comprises 7MHZ-9MHZ;
The frequency of described second frequency range comprises 400MHZ-900MHZ.
Alternatively, described device also comprises:
First linkage unit, for connecting with described second Set Top Box;
Described first transmitting element is also for sending test link order by described coaxial line to described second Set Top Box, and described test link order comprises the chipID information of described first Set Top Box;
Described judging unit is also for judging whether described first Set Top Box receives the connection reception instruction of described second Set Top Box transmission in the 3rd time threshold, and described connection receives the chipID information that instruction comprises described second Set Top Box;
First dispensing unit, for described first Set Top Box after the first activation instruction receiving front end transmission, be configured according to described first activation instruction, described first activation instruction is for activating the data transmission device of described first Set Top Box, and described first activation instruction comprises the chipID information of described first Set Top Box.
A kind of data transmission method, described method comprises:
Second Set Top Box receives the audio-video signal after the modulation of the first Set Top Box transmission and control signal by coaxial line, audio-video signal after described modulation is positioned at the first frequency range, control signal after described modulation is positioned at the second frequency range, wherein said first frequency range and described second frequency range do not interfere with each other, and described control signal comprises remote signal and/or CA authorization message;
Control signal after the modulation that described in demodulation, the first Set Top Box sends;
According to described control signal, the audio-video signal that described control signal is specified is sent to display device, the audio-video signal after the audio-video signal that described control signal is specified comprises the modulation of described first Set Top Box transmission or described second Set Top Box receive the audio-video signal that external signal exports after treatment.
Alternatively, the control signal after the modulation that described in described demodulation, the first Set Top Box sends comprises:
Control signal after described modulation is processed through demodulation amplification module, obtains described control signal.
Alternatively, also comprise before the audio-video signal after described second Set Top Box receives the modulation of the first Set Top Box transmission by coaxial line and control signal:
Described second Set Top Box receives the control index signal that described first Set Top Box sends, and described control index signal is used to indicate described first Set Top Box and controls described second Set Top Box;
Described second Set Top Box generates the feedback signal of described control index signal according to described control index signal and is sent to described first Set Top Box by described coaxial line.
Alternatively, described according to described control signal by described first Set Top Box send modulation after audio-video signal send to display device after also comprise:
Described second Set Top Box receives the heartbeat instruction that described first Set Top Box is sent by described coaxial line;
Described second Set Top Box generates the feedback signal of described heartbeat instruction according to described heartbeat instruction, and sends to described first Set Top Box by described coaxial line.
Alternatively, the frequency of described first frequency range comprises 7MHZ-9MHZ; The frequency of described second frequency range comprises 400MHZ-900MHZ.
Alternatively, described second Set Top Box also comprises before receiving the control index signal of described first Set Top Box transmission:
Described second Set Top Box and described first Set Top Box connect;
Described second Set Top Box receives the test link order of described first Set Top Box transmission by coaxial line, and described test link order comprises the chipID information of described first Set Top Box;
Described second Set Top Box generates to connect according to described test link order and receives instruction, and by described coaxial line, described connection reception instruction is sent to described first Set Top Box, and described connection receives the chipID information that instruction comprises described second Set Top Box;
Described second Set Top Box is after receiving the second activation instruction, be configured according to described second activation instruction, described second activation instruction is for activating the data transmission device of described second Set Top Box, and described second activation instruction comprises the chipID information of described second Set Top Box.
A kind of data transmission device, described device comprises:
Second receiving element, for received by coaxial line first Set Top Box send modulation after audio-video signal and control signal, audio-video signal after described modulation is positioned at the first frequency range, control signal after described modulation is positioned at the second frequency range, wherein said first frequency range and described second frequency range do not interfere with each other, and described control signal comprises remote signal and/or CA authorization message;
Demodulating unit, for the control signal after the modulation that the first Set Top Box described in demodulation sends;
Second transmitting element, for the audio-video signal that described control signal is specified being sent to display device according to described control signal, the audio-video signal after the audio-video signal that described control signal is specified comprises the modulation of described first Set Top Box transmission or described second Set Top Box receive the audio-video signal that external signal exports after treatment.
Alternatively, described demodulating unit comprises: demodulation amplification module, described demodulating unit specifically for,
Control signal after described modulation is processed through demodulation amplification module, obtains described control signal.
Alternatively, described second receiving element is also for receiving the control index signal that described first Set Top Box sends, and described control index signal is used to indicate described first Set Top Box and controls described second Set Top Box;
Described second transmitting element is also for generating the feedback signal of described control index signal according to described control index signal and being sent to described first Set Top Box by described coaxial line.
Alternatively, described second receiving element is also for receiving the heartbeat instruction that described first Set Top Box is sent by described coaxial line;
Described second transmitting element also for generating the feedback signal of described heartbeat instruction according to described heartbeat instruction, and sends to described first Set Top Box by described coaxial line.
Alternatively, the frequency of described first frequency range comprises 7MHZ-9MHZ; The frequency of described second frequency range comprises 400MHZ-900MHZ.
Alternatively, described device also comprises:
Second linkage unit, for connecting with described first Set Top Box;
Described second receiving element is also for receiving the test link order that described first Set Top Box sends by coaxial line, described test link order comprises the chipID information of described first Set Top Box;
Described second transmitting element also receives instruction for generating to connect according to described test link order, and by described coaxial line, described connection reception instruction being sent to described first Set Top Box, described connection receives the chipID information that instruction comprises described second Set Top Box;
Second dispensing unit, for after receiving the second activation instruction, be configured according to described second activation instruction, described second activation instruction is for activating the data transmission device of described second Set Top Box, and described second activation instruction comprises the chipID information of described second Set Top Box.
A kind of data transmission system, described Set Top Box control system comprises: the first Set Top Box, the second Set Top Box, at least one display device and coaxial line, wherein,
Described first Set Top Box connects described second Set Top Box by described coaxial line, and described second Set Top Box connects display device;
Described first Set Top Box is used for audio-video signal to be modulated to the first frequency range, control signal is modulated to the second frequency range, wherein said first frequency range and described second frequency range do not interfere with each other, described control signal comprises remote signal and/or CA authorization message, by described coaxial line, the described audio-video signal after modulation and described control signal is transferred to described second Set Top Box simultaneously;
Described second Set Top Box is used for receiving the described audio-video signal after the modulation of described first Set Top Box transmission and described control signal by described coaxial line, described control signal after the modulation that described in demodulation, the first Set Top Box sends, according to described control signal, the audio-video signal that described control signal is specified is sent to display device, the audio-video signal after the audio-video signal that described control signal is specified comprises the modulation of described first Set Top Box transmission or described second Set Top Box receive the audio-video signal that external signal exports after treatment.
Alternatively, described first Set Top Box comprises the data transmission device as described in claim 7-12;
Described second Set Top Box comprises the data transmission device as described in claim 19-24.
Foregoing invention, by the first Set Top Box, audio-video signal is modulated to the first frequency range, control signal is modulated to the second frequency range, wherein the first frequency range and described second frequency range do not interfere with each other, control signal comprises remote signal and/or CA authorization message, by coaxial line, the audio-video signal after modulation and control signal are transferred to the second Set Top Box simultaneously, second Set Top Box receive modulation after audio-video signal and control signal and demodulation modulation after control signal, according to control signal by modulation after audio-video signal send to display device.By being controlled mutually by coaxial line between the method Set Top Box, stable signal transmission and transmission of information amount is large.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of a kind of data transmission method one of the present invention execution mode;
Fig. 2 is control signal modulation and demodulation circuit theory schematic diagram of the present invention;
Fig. 3 A is control signal modulation and demodulation circuit diagram of the present invention;
Fig. 3 B is control signal modulation and demodulation circuit diagram of the present invention;
Fig. 4 is the schematic flow sheet of a kind of another execution mode of data transmission method of the present invention;
Fig. 5 is the first Set Top Box and the second Set Top Box initialization one execution mode schematic flow sheet in the present invention;
Fig. 6 is that in the present invention, the first set-top box requests controls the second Set Top Box one execution mode schematic flow sheet;
Fig. 7 is that in the present invention, the first Set Top Box controls the second Set Top Box one execution mode schematic flow sheet;
Fig. 8 judges the whether in running order execution mode schematic flow sheet of the second Set Top Box in the present invention;
Fig. 9 is a kind of data transmission device one execution mode of the present invention structural representation;
Figure 10 is a kind of another execution mode structural representation of data transmission device of the present invention;
Figure 11 is a kind of data transmission system structural representation of the present invention;
Figure 12 is a kind of data transmission system functional schematic of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, the term used in embodiments of the present invention is only for the object describing specific embodiment, and not intended to be limiting the present invention." one ", " described " and " being somebody's turn to do " of the singulative used in the embodiment of the present invention and appended claims is also intended to comprise most form, unless context clearly represents other implications.It is also understood that term "and/or" used herein refer to and comprise one or more project of listing be associated any or all may combine.
Refer to Fig. 1, Fig. 1 is the flow chart of a kind of data transmission method one of the present invention execution mode.The data transmission method of present embodiment is applied to data transmission system, and described data transmission method can comprise:
Audio-video signal is modulated to the first frequency range by the step S101: the first Set Top Box, and control signal is modulated to the second frequency range.
Particularly, suppose that user have activated data-transformation facility in Set Top Box, also can by this function called after " Xtraview ", namely the first Set Top Box and the second Set Top Box connecting test complete and activate and be configured with data-transformation facility, user controls the first Set Top Box and enters data transfer menu, and trigger turn-on data transfer function, now, the second Set Top Box has accepted the control of the first Set Top Box.First set-top box main processor receives external signal, such as wire signal or satellite-signal etc., and will by output sound vision signal after the first set-top box main processor process, audio-video signal is modulated to the first frequency range by RF modulation chip, and the frequency of the first frequency range includes but not limited to as 400-800MHZ frequency range.
Fig. 2 is control signal modulation and demodulation circuit theory schematic diagram, and Fig. 3 A and Fig. 3 B is control signal modulation and demodulation circuit diagrams.This circuit is used for the control signal that the first Set Top Box or the second Set Top Box sent or feedback signal is modulated to the second frequency range, and control signal after the modulation that receives of demodulation or feedback signal.This control signal comprises remote signal and/or CA authorization message, and this circuit comprises: oppositely comparison circuit module 201, first or door module 202, bandpass filtering modules block 203, amplification circuit module 204, switch module 205, demodulation amplification module 206 and second or door module 207.Particularly, by control signal after anti-phase comparison circuit module 201 processes, input with carrier signal the signal that first or door module 202, first or door module export to process through bandpass filtering modules block 203 and amplification circuit module 204 simultaneously, obtain the control signal after modulating.The frequency range of this carrier signal is the second frequency range, and the frequency of this second frequency range includes but not limited to 7-8MHZ.
It should be noted that, control signal also can without reverse comparison circuit module 201, such as, remote signal directly can be inputted together with carrier wave first or door module 202 control signal being modulated on carrier wave.
It should be noted that, a more than RF head interface in usual first Set Top Box or the second Set Top Box, this RF interface may be used for connecting the first Set Top Box and the second Set Top Box by coaxial line, supposes there are two RF interfaces, is respectively a RF head interface and the 2nd RF head interface.Switch module 205 is for selecting a certain RF head interface as the transmit port sending signal to the second Set Top Box; Equally, second or the receiving port of signal of door module 207 for selecting a certain RF head interface and sending as the second Set Top Box.In like manner, for the second Set Top Box, switch module 205 is for selecting a certain RF head interface as the transmit port sending signal to the first Set Top Box; Equally, second or the receiving port of signal of door module 207 for selecting a certain RF head interface and sending as reception first Set Top Box.
Also it should be noted that, control signal modulation and demodulation circuit diagram in Fig. 3 A and Fig. 3 B is the specific implementation circuit of corresponding Fig. 2 modules, but the circuit structure in Fig. 3 A and Fig. 3 B is one of them embodiment of the present invention, control signal modulation and demodulation circuit in the embodiment of the present invention is not limited to the circuit structure in Fig. 3 A and Fig. 3 B, is not limited to the components and parts model that identifies in Fig. 3 A and Fig. 3 B and parameter equally.
Audio-video signal after modulation and control signal are transferred to the second Set Top Box by coaxial line by the step S102: the first Set Top Box simultaneously.
Particularly, the audio-video signal after modulation and control signal warp are transferred to the second Set Top Box by coaxial line by the first Set Top Box simultaneously.Because the first frequency range and the second frequency range do not interfere with each other, therefore can be transmitted by coaxial line simultaneously.
Step S103: the second Set Top Box receives the audio-video signal after the modulation of the first Set Top Box transmission and control signal by coaxial line.
A CA decryption card is only had in usual one family, suppose that CA is installed in the first Set Top Box, remote information and CA authorization message can be sent to the second Set Top Box through coaxial line by the data-transformation facility of its configuration by the first Set Top Box, thus realize a multiple Set Top Box use of CA decryption card.
Usual second Set Top Box can receive external signal by the F head of oneself, watches the channel of oneself, but after the second Set Top Box accepts the first Set Top Box control, its channel received controls by the first Set Top Box.
Control signal after the modulation that described in step S104: the second Set Top Box demodulation, the first Set Top Box sends.
Particularly, the second Set Top Box carries out demodulation by control signal modulation and demodulation circuit to this control signal after receiving the audio-video signal after the modulation of the first Set Top Box transmission and control signal.Namely the control signal after modulation processes through demodulation amplification module 206 by the second Set Top Box, obtains control signal.
The audio-video signal that control signal is specified according to control signal by the step S105: the second Set Top Box sends to display device.
Audio-video signal after the modulation that second Set Top Box receives is the signal carrying out on the display device after can being exported by the second Set Top Box RF head interface showing.After second Set Top Box demodulation control information, control the second Set Top Box according to control signal and the audio-video signal that this control signal is specified is sent to display device, the audio-video signal that this control signal is specified comprises the audio-video signal after the modulation of RF modulation chip that the first Set Top Box sends or the audio-video signal that exports after treatment of external signal that the second Set Top Box receives.Particularly, a switch can be set, control by control signal the audio-video signal that the second Set Top Box sends to display device and originate.That is, the source of the user's audio-video signal that the display device under the second Set Top Box can be selected to show by control first Set Top Box.
Such as, first Set Top Box is receiving the first channel, first Set Top Box controls the second Set Top Box and watches the second channel, when the first channel is different with the second channel, first Set Top Box can select control second Set Top Box to watch the second channel by receiving external signal, the channel deciphering that the CA authorization message that first Set Top Box sends to the second Set Top Box can be watched the second Set Top Box, when the first channel is identical with the second channel, also can control the second Set Top Box to display device send first Set Top Box send modulation after audio-video signal.
It should be noted that, the first Set Top Box and the second Set Top Box can have identical configuration, and namely the first Set Top Box and the second Set Top Box comprise all modules in control signal modulation and demodulation circuit simultaneously.Second Set Top Box also can control the first Set Top Box as primary set-top box, and now, the second Set Top Box sends to the first Set Top Box and controls index signal, and Request Control first Set Top Box can realize.
In the present embodiment, by the first Set Top Box, audio-video signal is modulated to the first frequency range, control signal is modulated to the second frequency range, wherein the first frequency range and described second frequency range do not interfere with each other, control signal comprises remote signal and/or CA authorization message, by coaxial line, the audio-video signal after modulation and control signal are transferred to the second Set Top Box simultaneously, second Set Top Box receive modulation after audio-video signal and control signal and demodulation modulation after control signal, send to display device according to the audio-video signal that control signal is specified by control signal.By the method, can be controlled mutually by coaxial line between Set Top Box, stable signal transmission and transmission of information amount is large.
Refer to Fig. 4, Fig. 4 is the flow chart of a kind of data transmission method one of the present invention execution mode.The data transmission method of present embodiment is applied to data transmission system, and described data transmission method comprises:
Step S401: the first Set Top Box and the second Set Top Box initialization.
Particularly, before Set Top Box uses, need exact connect ion and activate and configuration data transfer function.Refer to the description part of Fig. 5 first Set Top Box and the second Set Top Box initialization one execution mode flow chart and Fig. 5.
Step S402: the first set-top box requests controls the second Set Top Box.
It should be noted that, the first Set Top Box and the second Set Top Box can have identical configuration, and namely the first Set Top Box and the second Set Top Box comprise all modules in control signal modulation and demodulation circuit simultaneously.Second Set Top Box also can control the first Set Top Box as primary set-top box, and now, the second Set Top Box sends to the first Set Top Box and controls index signal, and Request Control first Set Top Box can realize.Particularly, the description part that Fig. 6 first set-top box requests controls the second Set Top Box one execution mode flow chart and Fig. 6 is referred to.
Step S403: the first Set Top Box controls the second Set Top Box.
Particularly, after step S402, the second Set Top Box has accepted the control of the first Set Top Box.Now, the first Set Top Box can control the channel that the second Set Top Box is watched.Refer to the description part that Fig. 7 first Set Top Box controls the second Set Top Box one execution mode flow chart and Fig. 6.
Step S404: judge that whether the second Set Top Box is in running order.
Particularly, the description part judging the whether in running order execution mode flow chart of the second Set Top Box and Fig. 6 is referred in Fig. 8 the present invention.
Refer to Fig. 5, Fig. 5 is the first Set Top Box and the second Set Top Box initialization one execution mode flow chart.This step 401 comprises:
Step S4011: the first Set Top Box and the second Set Top Box connect.
Concrete, user connects the first Set Top Box and the second Set Top Box by coaxial line, and the first Set Top Box is connected power supply and power-on switch respectively with the second Set Top Box.
Step S4012: the first Set Top Box sends test link order to the second Set Top Box.
Particularly, first Set Top Box sends test link order by coaxial line to the second Set Top Box, this test link order comprises the chipID information of the first Set Top Box, chipID Information Availability in Set Top Box, in cognitron top box, the first Set Top Box display floater is pointed out " in the transmission of test link order ".
Step S4013: the second Set Top Box receives the test link order that the first Set Top Box sends, and generates connection reception instruction according to this test link order and send to the first Set Top Box.
Particularly, after second Set Top Box receives the test link order of the first Set Top Box transmission, generate to connect according to this instruction and receive instruction, this connection receives the chipID information that instruction comprises the second Set Top Box, and this connection reception instruction is being sent to the first Set Top Box by coaxial line.
Step S4014: judge whether the first Set Top Box receives the connection reception instruction of the second Set Top Box transmission in the 3rd time threshold.
Particularly, first Set Top Box judges whether that the connection whether receiving the second Set Top Box transmission at the 3rd time threshold receives instruction, if so, then the first Set Top Box and the second Set Top Box complete pairing, point out " connecting test success " in the first Set Top Box display floater.3rd time threshold can be 10 seconds, 15 seconds or 30 seconds etc., and the present invention is not restricted.
Step S4015: the first Set Top Box receives the first activation instruction and is configured according to this first activation instruction.
Particularly, after the first Set Top Box and the second Set Top Box complete pairing, user can data-transformation facility in activating machine top box, the mode the present invention activated is not construed as limiting, the mode activated includes but not limited to that forward end informs by telephone activation data transfer function, and informs the chipID information of the first Set Top Box, and front end sends the first activation instruction, this first activation instruction is for activating the data transmission device of the first Set Top Box, and the first Set Top Box is configured according to the first activation instruction.
Step S4016: the second Set Top Box receives the second activation instruction and is configured according to this second activation instruction.
Particularly, after the first Set Top Box and the second Set Top Box complete pairing, user can data-transformation facility in activating machine top box, the mode the present invention activated is not construed as limiting, the mode activated includes but not limited to that forward end informs by telephone activation data transfer function, and informs the chipID information of the second Set Top Box, and front end sends the second activation instruction, this first activation instruction is for activating the data transmission device of the second Set Top Box, and the second Set Top Box is configured according to the second activation instruction.
It should be noted that, step S4015 and step S4016 can or perform with any order simultaneously.
Refer to Fig. 6, Fig. 6 is that the first set-top box requests controls the second Set Top Box one execution mode flow chart, and particularly, this step S402 comprises:
Step S4021: the first Set Top Box sends control index signal by coaxial line to the second Set Top Box.
Particularly, user can enter data-transformation facility menu by remote control first Set Top Box, trigger data transmission function, now the first Set Top Box controls index signal by coaxial line to transmission, Request Control second Set Top Box, this control index signal is used to indicate the first Set Top Box and controls the second Set Top Box.
It should be noted that, the first Set Top Box sends this control index signal through coaxial line to the second Set Top Box by control signal modulation and demodulation circuit.
Step S4022: the second Set Top Box receives control index signal that the first Set Top Box sends and the feedback signal generating this control index signal is sent to the first Set Top Box by coaxial line.
Particularly, the user of the second Set Top Box can select the second Set Top Box to accept or not accept the control of the first Set Top Box, can on its display device Pop-up message frame, the user of the second Set Top Box is pointed out whether to accept the control of the first Set Top Box, if, then the second Set Top Box generates the feedback signal of this control index signal, and sends the first Set Top Box by coaxial line, represents and accepts control.
It should be noted that, the second Set Top Box can be received by control signal modulation and demodulation circuit and control index signal, is sent the feedback signal of this control index signal by control signal modulation and demodulation circuit.
Step S4023: the first Set Top Box receives the feedback signal of the control index signal that the second Set Top Box is sent by coaxial line.
Particularly, first Set Top Box can receive the feedback signal of the control index signal that the second Set Top Box is sent by coaxial line by control signal modulation and demodulation circuit, " accepting control " can be pointed out by display device in the first Set Top Box on display floater or under it, show that the second Set Top Box has accepted the control of the first Set Top Box.
Refer to Fig. 7, Fig. 7 is that the first Set Top Box controls the second Set Top Box one execution mode flow chart.This step S403 comprises:
Audio-video signal is modulated to the first frequency range by the step S4031: the first Set Top Box, and control signal is modulated to the second frequency range.
Particularly, the second Set Top Box has accepted the control of the first Set Top Box.First set-top box main processor receives external signal, such as wire signal or satellite-signal etc., and will by output sound vision signal after the first set-top box main processor process, audio-video signal is modulated to the first frequency range by RF modulation chip, and the frequency of the first frequency range includes but not limited to as 400-800MHZ frequency range.
Fig. 2 is control signal modulation and demodulation electrical block diagrams, and Fig. 3 is control signal modulation and demodulation circuit diagrams.This circuit is used for the control signal that the first Set Top Box or the second Set Top Box sent or feedback signal is modulated to the second frequency range, and control signal after the modulation that receives of demodulation or feedback signal.This control signal comprises remote signal and/or CA authorization message, and this circuit comprises: oppositely comparison circuit module 201, first or door module 202, bandpass filtering modules block 203, amplification circuit module 204, switch module 205, demodulation amplification module 206 and second or door module 207.Particularly, the control signal that first Set Top Box controls the second Set Top Box by control signal after anti-phase comparison circuit module 201 processes, input first or door module 202 with carrier signal simultaneously, first or door module export signal process through bandpass filtering modules block 203 and amplification circuit module 204, obtaining the control signal after modulating. the frequency range of this carrier signal is the second frequency range, and the frequency of this second frequency range includes but not limited to 7-8MHZ.
It should be noted that, control signal also can without reverse comparison circuit module 201, such as, remote signal directly can be inputted together with carrier wave first or door module 202 control signal being modulated on carrier wave.
It should be noted that, a more than RF head interface in usual first Set Top Box or the second Set Top Box, this RF interface is used for connecting the first Set Top Box and the second Set Top Box by coaxial line, supposes there are two RF interfaces, is respectively a RF head interface and the 2nd RF head interface.Switch module 205 is for selecting a certain RF head interface as the transmit port sending signal to the second Set Top Box; Equally, second or the receiving port of signal of door module 207 for selecting a certain RF head interface and sending as the second Set Top Box.In like manner, for the second Set Top Box, switch module 205 is for selecting a certain RF head interface as the transmit port sending signal to the first Set Top Box; Equally, second or the receiving port of signal of door module 207 for selecting a certain RF head interface and sending as reception first Set Top Box.
Audio-video signal after modulation and control signal are transferred to the second Set Top Box by coaxial line by the step S4032: the first Set Top Box simultaneously.
Particularly, the audio-video signal after modulation and control signal warp are transferred to the second Set Top Box by coaxial line by the first Set Top Box simultaneously.Because the first frequency range and the second frequency range do not interfere with each other, therefore can be transmitted by coaxial line simultaneously.
Step S4033: the second Set Top Box receives the audio-video signal after the modulation of the first Set Top Box transmission and control signal by coaxial line.
A CA decryption card is only had in usual one family, suppose that CA is installed in the first Set Top Box, remote information and CA authorization message can be sent to the second Set Top Box through coaxial line by the data-transformation facility of its configuration by the first Set Top Box, thus realize a multiple Set Top Box use of CA decryption card.
Usual second Set Top Box can receive external signal by the F head of oneself, watches the channel of oneself, but after the second Set Top Box accepts the first Set Top Box control, its channel received controls by the first Set Top Box.
Control signal after the modulation that described in step S4034: the second Set Top Box demodulation, the first Set Top Box sends.
Particularly, the second Set Top Box carries out demodulation by control signal modulation and demodulation circuit to this control signal after receiving the audio-video signal after the modulation of the first Set Top Box transmission and control signal.Namely the control signal after modulation processes through demodulation amplification module 206 by the second Set Top Box, obtains control signal.
The audio-video signal that control signal is specified according to control signal by the step S4035: the second Set Top Box sends to display device.
Audio-video signal after the modulation that second Set Top Box receives is the signal carrying out on the display device after can being exported by the second Set Top Box RF head interface showing.After second Set Top Box demodulation control information, control the second Set Top Box according to control signal and the audio-video signal that this control signal is specified is sent to display device, the audio-video signal that this control signal is specified comprises the audio-video signal after the modulation of RF modulation chip that the first Set Top Box sends or the audio-video signal that exports after the second set-top box main processor process of external signal that the second Set Top Box receives.Particularly, a switch can be set, control by control signal the audio-video signal that the second Set Top Box sends to display device and originate.That is, the source of the user's audio-video signal that the display device under the second Set Top Box can be selected to show by control first Set Top Box.
Such as, first Set Top Box is receiving the first channel, first Set Top Box controls the second Set Top Box and watches the second channel, when the first channel is different with the second channel, first Set Top Box can select control second Set Top Box to watch the second channel by receiving external signal, the channel deciphering that the CA authorization message that first Set Top Box sends to the second Set Top Box can be watched the second Set Top Box, when the first channel is identical with the second channel, also can control the second Set Top Box to display device send first Set Top Box send modulation after audio-video signal.
Refer to Fig. 8, Fig. 8 judges the whether in running order execution mode flow chart of the second Set Top Box in the present invention.Particularly, step S404 comprises:
S4041: the first Set Top Box sends heartbeat instruction by coaxial line to the second Set Top Box.
First Set Top Box can monitor whether the second Set Top Box is in uncontrolled operating state the moment, when the second Set Top Box closed or the second Set Top Box stopped to display device send audio-video signal, then the second Set Top Box is not in uncontrolled operating state, and the first Set Top Box does not need to continue to send the audio-video signal after modulation and control information to the second Set Top Box.
Particularly, first Set Top Box can also send heartbeat instruction by coaxial line to the second Set Top Box, and for monitoring the second Set Top Box, this heartbeat instruction sends once every very first time threshold value, this very first time threshold value can be 10 seconds, 30 seconds, 60 seconds etc., and the present invention does not limit.
It should be noted that, similar with control signal, heartbeat instruction also can be sent to the second Set Top Box by control signal modulation and demodulation circuit through coaxial line.
S4042: the second Set Top Box receives heartbeat instruction that the first Set Top Box sent by coaxial line and the feedback signal generating this heartbeat instruction sends to the first Set Top Box by coaxial line.
Particularly, after second Set Top Box receives the heartbeat instruction that the first Set Top Box sent by coaxial line, detect the state of the current operation of the second Set Top Box, when when the second Set Top Box closed or the second Set Top Box stopped to display device send audio-video signal, then be judged as that the second Set Top Box is in uncontrolled operating state, then the second Set Top Box does not generate the feedback signal of heartbeat instruction; Otherwise, generate the feedback signal of heartbeat instruction, and send to described first Set Top Box by coaxial line.
It should be noted that, similar with control signal, the feedback signal of this heartbeat instruction also can be sent to the first Set Top Box by control signal modulation and demodulation circuit through coaxial line.
S4043: the first Set Top Box judges the feedback signal whether receiving the heartbeat instruction that the second Set Top Box is sent by coaxial line in the second time threshold.
First Set Top Box judges the feedback signal whether receiving the heartbeat instruction that the second Set Top Box is sent by coaxial line in the second time threshold, if not, then stops performing step S403.Second time threshold can be set to 10 minutes, 15 minutes, 30 minutes etc., and the present invention is not restricted.That is, as long as the first Set Top Box receives the feedback signal of a heartbeat instruction in the second time threshold, step S403 will be performed.
It should be noted that, similar with control signal, the first Set Top Box also can receive the feedback signal of this heartbeat instruction through coaxial line by control signal modulation and demodulation circuit.
In the present embodiment, first Set Top Box and the second Set Top Box pass through initialization, activate and configuration data transfer function after, first Set Top Box is sent by coaxial line and controls index signal, Request Control second Set Top Box, second Set Top Box is received this control index signal and is sent the feedback signal controlling index signal by coaxial line to the first Set Top Box, represent the control of acceptance first Set Top Box, audio-video signal is modulated to the first frequency range by the first Set Top Box, control signal is modulated to the second frequency range, and by coaxial line, the audio-video signal after modulation and control signal are transferred to the second Set Top Box simultaneously, second Set Top Box receive modulation after audio-video signal and control signal and demodulation modulation after control signal, display device is sent to according to the audio-video signal that control signal is specified by control signal, and first Set Top Box monitor the second Set Top Box in real time by sending heartbeat instruction.By the method, can be controlled mutually by coaxial line and monitor between Set Top Box, stable signal transmission and transmission of information amount is large.
Refer to Fig. 9, Fig. 9 is a kind of data transmission device structural representation of the present invention.This data transmission device comprises:
First modulating unit 901, for being modulated to the first frequency range by audio-video signal.
Particularly, this first modulating unit 901 comprises RF modulation chip, and this RF modulation chip is used for audio-video signal modulation band first frequency range the first set-top box main processor exported, and the audio-video signal frequency after modulation comprises 400-900MHZ.
Second modulating unit 902, for being modulated to the second frequency range by control signal.
Particularly, second modulating unit 902 comprises: anti-phase comparison circuit module 201, first or door module 202, bandpass filtering modules block 203 and amplification circuit module 204, this modulating unit specifically for: by control signal after anti-phase comparison circuit module 201 processes, input first or door module 202 with carrier signal simultaneously; The frequency range of this carrier signal is the second frequency range; The signal first or door module 202 exported processes through bandpass filtering modules block 203 and amplification circuit module 204, obtain the control signal after modulating, control signal frequency after modulation is 7MHZ-9MHZ, and this control signal comprises remote signal and/or CA authorization message.Wherein the first frequency range and the second frequency range do not interfere with each other, and can transmit on coaxial line simultaneously.
It should be noted that, control signal also can without reverse comparison circuit module 201, such as, remote signal directly can be inputted together with carrier wave first or door module 202 control signal being modulated on carrier wave.
Alternatively, this modulating unit also comprises switch module 205, and this module is for selecting a certain RF head interface as the transmit port sending signal to the second Set Top Box.
First transmitting element 903, for being transferred to the second Set Top Box by coaxial line by the audio-video signal after modulation and control signal simultaneously.
Alternatively, the first transmitting element 903 is also for sending control index signal by coaxial line to the second Set Top Box, and this control index signal is used to indicate the first Set Top Box and controls the second Set Top Box.
Second modulating unit 902 also for modulation control index signal, the first transmitting element 903 also for, for by coaxial line by modulation after control index signal be transferred to the second Set Top Box.
This device also comprises, first receiving element 904, for receiving the feedback signal of the control index signal that the second Set Top Box is sent by coaxial line, the feedback signal of this control index signal is the control index signal generation that the first Set Top Box received according to the second Set Top Box controls the second Set Top Box.
Alternatively, first receiving element 904 also comprises demodulation amplification module 206, this first receiving element 904 also for the feedback signal of the control index signal after the modulation of the first Set Top Box reception being processed through demodulation amplification module 206, obtains the feedback signal of control signal.
Alternatively, the first receiving element 904 also comprises second or door module 207, the receiving port of signal of this module for selecting a certain RF head interface and sending as reception second Set Top Box.
Alternatively, the first transmitting element 903 is also for sending heartbeat instruction by coaxial line to the second Set Top Box, and this heartbeat instruction sends once every very first time threshold value.
Particularly, first Set Top Box can also send heartbeat instruction by coaxial line to the second Set Top Box, and for monitoring the second Set Top Box, this heartbeat instruction sends once every very first time threshold value, this very first time threshold value can be 10 seconds, 30 seconds, 60 seconds etc., and the present invention does not limit.
Alternatively, the second modulating unit 904 is also for modulating heartbeat instruction.First transmitting element 903 is also for sending the heartbeat instruction after modulation.
This data transmission device also comprises, judging unit 905, for judging the feedback signal whether receiving the described heartbeat instruction that the second Set Top Box is sent by coaxial line in the second time threshold.
Particularly, first Set Top Box judges the feedback signal whether receiving the heartbeat instruction that the second Set Top Box is sent by coaxial line in the second time threshold, if not, then stop performing, by coaxial line, the audio-video signal after modulation and control signal are transferred to the second Set Top Box simultaneously.Second time threshold can be set to 10 minutes, 15 minutes, 30 minutes etc., and the present invention is not restricted.That is, as long as the first Set Top Box receives the feedback signal of a heartbeat instruction in the second time threshold, will perform, by coaxial line, the audio-video signal after modulation and control signal are transferred to the second Set Top Box simultaneously.
Alternatively, this data transmission device also comprises:
First linkage unit 906, for connecting with the second Set Top Box.
First transmitting element 903 is also for sending test link order by coaxial line to the second Set Top Box, and wherein, this test link order comprises the chipID information of the first Set Top Box.
Judging unit 905 is also for judging whether the first Set Top Box receives the connection reception instruction of the second Set Top Box transmission in the 3rd time threshold, and this connection receives the chipID information that instruction comprises the second Set Top Box.3rd time threshold can be 10 seconds, 15 seconds or 30 seconds etc., and the present invention is not restricted.
First dispensing unit 907, for after the first activation instruction receiving front end transmission, be configured according to the first activation instruction, this first activation instruction is for activating the data transmission device of the first Set Top Box, and this first activation instruction comprises the chipID information of the first Set Top Box.
Refer to Figure 10, Figure 10 is a kind of data transmission device structural representation of the present invention, and this data transmission device comprises:
Second receiving element 1001, for received by coaxial line first Set Top Box send modulation after audio-video signal and control signal, audio-video signal after modulation is positioned at the first frequency range, control signal after modulation is positioned at the second frequency range, wherein the first frequency range and the second frequency range do not interfere with each other and can coaxial line transmit simultaneously again, and this control signal comprises remote signal and/or CA authorization message;
Demodulating unit 1002, for the control signal after the modulation that demodulation first Set Top Box sends.
Particularly, demodulating unit 1002 comprises: demodulation amplification module 206, and this demodulating unit, specifically for the control signal after the first Set Top Box modulation received being processed through demodulation amplification module 206, obtains control signal.
This demodulating unit 1002 also comprises alternatively, and second or door module 207, the receiving port of signal of this module for selecting a certain RF head interface and sending as reception first Set Top Box.
Second transmitting element 1003, sends to display device for the audio-video signal of control signal being specified according to control signal.
Particularly, the audio-video signal after the modulation that receives of the second Set Top Box carries out the signal that shows on the display device after can being exported by the second Set Top Box RF head interface.After second Set Top Box demodulation control information, control the second Set Top Box according to control signal and the audio-video signal that this control signal is specified is sent to display device, the audio-video signal that this control signal is specified comprises the audio-video signal after the modulation of RF modulation chip that the first Set Top Box sends or the audio-video signal that exports after the second set-top box main processor process of external signal that the second Set Top Box receives.Particularly, a switch can be set, control according to control signal the audio-video signal source that the second Set Top Box sends to display device.That is, the source of the user's audio-video signal that the display device under the second Set Top Box can be selected to show by control first Set Top Box.
Alternatively, the second receiving element 1001 is also for receiving the control index signal that the first Set Top Box sends, and control index signal is used to indicate the first Set Top Box and controls the second Set Top Box.
Alternatively, the second receiving element 1001 also for receive first Set Top Box send modulation after control index signal.
Demodulating unit 1002 is also for the control index signal after the modulation of demodulation first Set Top Box transmission.
Second transmitting element 1003 is also for generating the feedback signal of control index signal according to controlling index signal and be sent to the first Set Top Box by coaxial line.
Alternatively, second transmitting element 1003 also comprises: anti-phase comparison circuit module 201, first or door module 202, bandpass filtering modules block 203 and amplification circuit module 204, this unit specifically for: by controlling the feedback signal of index signal after anti-phase comparison circuit module 201 processes, input first or door module 202 with carrier signal simultaneously; The frequency range of this carrier signal is the second frequency range; The signal first or door module 202 exported processes through bandpass filtering modules block 203 and amplification circuit module 204, obtains the feedback signal of the control index signal after modulating.
Alternatively, this second transmitting element 1003 also comprises switch module 205, and this module is for selecting a certain RF head interface as the transmit port sending signal to the second Set Top Box.
Alternatively, second list 1001 yuan is received also for receiving the heartbeat instruction that the first Set Top Box is sent by coaxial line.Demodulating unit 1002 is also for separating the heartbeat instruction after the modulation of menstruation regulating first Set Top Box.
The feedback signal of the feedback signal of this heartbeat instruction or the heartbeat instruction after modulation also for generating the feedback signal of described heartbeat instruction according to heartbeat instruction, and is sent to the first Set Top Box by coaxial line by the second transmitting element 1003.
Alternatively, this data transmission device also comprises:
Second linkage unit 1004, for connecting with the first Set Top Box.
Second receiving element 1003 is also for receiving the test link order that the first Set Top Box sends by coaxial line, this test link order comprises the chipID information of the first Set Top Box.
Second transmitting element 1003 also receives instruction for generating to connect according to test link order, and by coaxial line, this connection reception instruction is sent to the first Set Top Box, and this connection receives the chipID information that instruction comprises the second Set Top Box.
Second dispensing unit 1005, for after receiving the second activation instruction, is configured according to the second activation instruction, and this second activation instruction is for activating the data transmission device of the second Set Top Box, and this second activation instruction comprises the chipID information of the second Set Top Box.
Refer to Figure 11, Figure 11 is a kind of data transmission system structural representation of the present invention, data transmission system comprises: the first at least one display device 30 of Set Top Box 10, second Set Top Box 20 and coaxial line 40, wherein, first Set Top Box 10 connects described second Set Top Box 20 by described coaxial line 40, and described second Set Top Box 20 connects display device 30.
First Set Top Box 10 is for being modulated to the first frequency range by audio-video signal, control signal is modulated to the second frequency range, wherein the first frequency range and the second frequency range do not interfere with each other, this control signal comprises remote signal and/or CA authorization message, and by coaxial line 40, the audio-video signal after modulation and control signal is transferred to the second Set Top Box 20 simultaneously.
Second Set Top Box 20 for received by coaxial line 40 first Set Top Box 10 send modulation after audio-video signal and control signal, control signal after the modulation that demodulation first Set Top Box 10 sends, send to display device 30 according to the audio-video signal that control signal is specified by control signal, the audio-video signal after the audio-video signal that control signal is specified comprises the modulation of the first Set Top Box transmission or the second Set Top Box receive the audio-video signal that external signal exports after treatment.
Refer to Figure 12, Figure 12 is a kind of data transmission system functional schematic of the present invention, the primary processor of the first Set Top Box 10 receives external signal, such as wire signal or satellite-signal, when first Set Top Box 10 trigging control the second Set Top Box 20, audio-video signal after master processor processes is modulated to the signal of 400-800MHZ frequency range by the first Set Top Box 10 by RF modulation chip, by control signal respectively through negater circuit module 201, first or door module 202, bandpass filtering modules block 203, amplification circuit module 204 is modulated to the signal that frequency is 7MHZ-9MHZ, RF head interface is selected to export this control signal through coaxial line 40 to the second Set Top Box 20 by switch module 205.Audio-video signal after modulation and the control signal after modulating do not interfere with each other and are transferred to the second Set Top Box 20 through coaxial line 40, and the audio-video signal wherein after modulation is the signal that can be exported directly to display device by RF head interface.Control signal after modulation demodulation amplification module 206 in the second Set Top Box 20 is demodulated into control signal, second Set Top Box 20 selects by second or door module 207 the RF head interface receiving control signal after the first Set Top Box 10 is modulated, and the audio-video signal that this control signal is specified is sent to display device 30 according to control signal by the second Set Top Box 20.
It should be noted that, second Set Top Box 20 can receive external signal by the F head of oneself when not accepting the first Set Top Box 10 and controlling, such as, wire signal or satellite-signal, accept the control of oneself remote signal, the display device under it sends the audio-video signal of the second Set Top Box 20 channel instantly.When the second Set Top Box 20 accept the first Set Top Box 10 control time, the control signal that second Set Top Box 20 sends by the first Set Top Box 10 controls, the audio-video signal that this control signal that display device 30 under it sends this is specified, the source of audio-video signal can be the audio-video signal after the modulation that sends of the first Set Top Box also can be the audio-video signal that the second Set Top Box is received by oneself F head.
Also it should be noted that, the first Set Top Box 10 can also send to the second Set Top Box 20 and control index signal or heartbeat instruction.Similar with control signal, control index signal or heartbeat instruction can respectively by negater circuit module 201, first or door module 202, bandpass filtering modules block 203, amplification circuit module 204 be modulated to the signal that frequency is 7MHZ-9MHZ, select RF head interface to export the control index signal after modulation or heartbeat instruction through coaxial line 40 to the second Set Top Box 20 by switch module 205.The primary processor of the second Set Top Box 20 receives control index signal after the control index signal after modulation or heartbeat instruction after this modulation of demodulation or heartbeat instruction, and generates the feedback signal of this control index signal or heartbeat instruction.This feedback signal through negater circuit module 201, first or door module 202, bandpass filtering modules block 203, amplification circuit module 204 be modulated to the signal that frequency is 7MHZ-9MHZ, select RF head interface to export the feedback signal after modulation by coaxial line 40 to the first Set Top Box 10 by switch module 205.Receive when the first Set Top Box 10 and after feedback signal by the control index signal after this modulation of demodulation amplification module 206 demodulation, represent that accepting the first Set Top Box 10 to the second machine top 20 box controls; After the feedback signal of the heartbeat instruction after the first Set Top Box 10 receives also this modulation of demodulation, represent to the second machine top 20 box and be in active state, the first Set Top Box 10 continues to transmit control signal and audio-video signal to the second Set Top Box 20.
Also it should be noted that, the first Set Top Box 10 and the second Set Top Box 20 have identical configuration, and namely the first Set Top Box 10 and the second Set Top Box 20 comprise all modules in control signal modulation and demodulation circuit simultaneously.Second Set Top Box 20 also can control the first Set Top Box 10 as primary set-top box, and now, the second Set Top Box 20 sends to the first Set Top Box 10 and controls index signal, and Request Control first Set Top Box 10 can realize.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly the interest field of the present invention can not be limited with this, one of ordinary skill in the art will appreciate that all or part of flow process realizing above-described embodiment, and according to the equivalent variations that the claims in the present invention are done, still belong to the scope that invention is contained.

Claims (22)

1. a data transmission method, is characterized in that, described method comprises:
Audio-video signal is modulated to the first frequency range by the first Set Top Box, and control signal is modulated to the second frequency range, and wherein said first frequency range and described second frequency range do not interfere with each other;
Described audio-video signal after modulation and described control signal are transferred to the second Set Top Box by coaxial line by described first Set Top Box simultaneously.
2. method according to claim 1, is characterized in that, described second frequency range that control signal is modulated to comprises:
By described control signal after anti-phase comparison circuit module processes, input first or door module with carrier signal simultaneously; The frequency range of described carrier signal is described second frequency range;
The signal that described first or door module export is processed through bandpass filtering modules block and amplification circuit module, obtains the described control signal after modulating.
3. method according to claim 2, is characterized in that, audio-video signal is modulated to the first frequency range by described first Set Top Box, and also comprises before control signal is modulated to the second frequency range:
Described first Set Top Box sends control index signal by described coaxial line to described second Set Top Box, and described control index signal is used to indicate described first Set Top Box and controls the second Set Top Box;
Described first Set Top Box receives the feedback signal of the described control index signal that described second Set Top Box is sent by described coaxial line, and the feedback signal of described control index signal is the control index signal generation that described first Set Top Box received according to described second Set Top Box controls described second Set Top Box.
4. the method according to any one of claim 1-3, is characterized in that, described first Set Top Box by coaxial line by modulation after described audio-video signal and described control signal be transferred to the second Set Top Box simultaneously after also comprise:
Described first Set Top Box sends heartbeat instruction by described coaxial line to the second Set Top Box, and described heartbeat instruction sends once every very first time threshold value;
Judge the feedback signal whether receiving the described heartbeat instruction that described second Set Top Box is sent by described coaxial line in the second time threshold, the feedback signal of described heartbeat instruction is the feedback signal that described second Set Top Box generates according to the heartbeat instruction that described first Set Top Box received sends, if not, then stop performing described first Set Top Box, by coaxial line, the described audio-video signal after modulation and described control signal are transferred to the second Set Top Box simultaneously.
5. method according to claim 3, is characterized in that, described first Set Top Box was also comprised before the second Set Top Box sends control index signal by described coaxial line:
Described first Set Top Box and described second Set Top Box connect;
Described first Set Top Box sends test link order by described coaxial line to described second Set Top Box, and described test link order comprises the chipID information of described first Set Top Box;
Judge whether described first Set Top Box receives the connection reception instruction of described second Set Top Box transmission in the 3rd time threshold, and described connection receives the chipID information that instruction comprises described second Set Top Box;
If, then described first Set Top Box is after receiving the first activation instruction, be configured according to described first activation instruction, described first activation instruction is for activating the data transmission device of described first Set Top Box, and described first activation instruction comprises the chipID information of described first Set Top Box.
6. a data transmission device, is characterized in that, described device comprises:
First modulating unit, for audio-video signal is modulated to the first frequency range,
Second modulating unit, for control signal is modulated to the second frequency range, wherein said first frequency range and described second frequency range do not interfere with each other;
First transmitting element, for being transferred to the second Set Top Box by coaxial line by the described audio-video signal after modulation and described control signal simultaneously.
7. device according to claim 6, is characterized in that, described modulating unit comprises: anti-phase comparison circuit module, first or door module, bandpass filtering modules block and amplification circuit module, described modulating unit specifically for:
By described control signal after anti-phase comparison circuit module processes, input first or door module with carrier signal simultaneously; The frequency range of described carrier signal is described second frequency range;
The signal that described first or door module export is processed through bandpass filtering modules block and amplification circuit module, obtains the described control signal after modulating.
8. device according to claim 7, is characterized in that,
Described first transmitting element is also for sending control index signal by described coaxial line to the second Set Top Box, and described control index signal is used to indicate described first Set Top Box and controls the second Set Top Box;
Described device also comprises,
First receiving element, for receiving the feedback signal of the described control index signal that described second Set Top Box is sent by described coaxial line, the feedback signal of described control index signal is the control index signal generation that described first Set Top Box received according to described second Set Top Box controls described second Set Top Box.
9. the device according to any one of claim 6-8, is characterized in that,
Described first transmitting element is also for sending heartbeat instruction by described coaxial line to described second Set Top Box, and described heartbeat instruction sends once every very first time threshold value;
Described device also comprises,
Judging unit, for judging the feedback signal whether receiving the described heartbeat instruction that described second Set Top Box is sent by described coaxial line in the second time threshold, the feedback signal of described heartbeat instruction is the feedback signal that described second Set Top Box generates according to the heartbeat instruction that described first Set Top Box received sends, if not, then stop performing described first Set Top Box, by coaxial line, the described audio-video signal after modulation and described control signal are transferred to the second Set Top Box simultaneously.
10. device according to claim 8, is characterized in that, described device also comprises:
First linkage unit, for connecting with described second Set Top Box;
Described first transmitting element is also for sending test link order by described coaxial line to described second Set Top Box, and described test link order comprises the chipID information of described first Set Top Box;
Described judging unit is also for judging whether described first Set Top Box receives the connection reception instruction of described second Set Top Box transmission in the 3rd time threshold, and described connection receives the chipID information that instruction comprises described second Set Top Box;
First dispensing unit, for described first Set Top Box after the first activation instruction receiving front end transmission, be configured according to described first activation instruction, described first activation instruction is for activating the data transmission device of described first Set Top Box, and described first activation instruction comprises the chipID information of described first Set Top Box.
11. 1 kinds of data transmission methods, is characterized in that, described method comprises:
Second Set Top Box receives the audio-video signal after the modulation of the first Set Top Box transmission and control signal by coaxial line, audio-video signal after described modulation is positioned at the first frequency range, control signal after described modulation is positioned at the second frequency range, and wherein said first frequency range and described second frequency range do not interfere with each other;
Control signal after the modulation that described in demodulation, the first Set Top Box sends;
According to described control signal, the audio-video signal that described control signal is specified is sent to display device, the audio-video signal after the audio-video signal that described control signal is specified comprises the modulation of described first Set Top Box transmission or described second Set Top Box receive the audio-video signal that external signal exports after treatment.
12. methods according to claim 11, is characterized in that, the control signal after the modulation that described in described demodulation, the first Set Top Box sends comprises:
Control signal after described modulation is processed through demodulation amplification module, obtains described control signal.
13. methods according to claim 12, is characterized in that, also comprise before the audio-video signal after described second Set Top Box receives the modulation of the first Set Top Box transmission by coaxial line and control signal:
Described second Set Top Box receives the control index signal that described first Set Top Box sends, and described control index signal is used to indicate described first Set Top Box and controls described second Set Top Box;
Described second Set Top Box generates the feedback signal of described control index signal according to described control index signal and is sent to described first Set Top Box by described coaxial line.
14. methods according to any one of claim 11-13, is characterized in that, the audio-video signal after the described modulation described first Set Top Box sent according to described control signal also comprises after sending to display device:
Described second Set Top Box receives the heartbeat instruction that described first Set Top Box is sent by described coaxial line;
Described second Set Top Box generates the feedback signal of described heartbeat instruction according to described heartbeat instruction, and sends to described first Set Top Box by described coaxial line.
15. methods according to claim 13, is characterized in that, described second Set Top Box also comprises before receiving the control index signal of described first Set Top Box transmission:
Described second Set Top Box and described first Set Top Box connect;
Described second Set Top Box receives the test link order of described first Set Top Box transmission by coaxial line, and described test link order comprises the chipID information of described first Set Top Box;
Described second Set Top Box generates to connect according to described test link order and receives instruction, and by described coaxial line, described connection reception instruction is sent to described first Set Top Box, and described connection receives the chipID information that instruction comprises described second Set Top Box;
Described second Set Top Box is after receiving the second activation instruction, be configured according to described second activation instruction, described second activation instruction is for activating the data transmission device of described second Set Top Box, and described second activation instruction comprises the chipID information of described second Set Top Box.
16. 1 kinds of data transmission devices, is characterized in that, described device comprises:
Second receiving element, for received by coaxial line first Set Top Box send modulation after audio-video signal and control signal, audio-video signal after described modulation is positioned at the first frequency range, control signal after described modulation is positioned at the second frequency range, and wherein said first frequency range and described second frequency range do not interfere with each other;
Demodulating unit, for the control signal after the modulation that the first Set Top Box described in demodulation sends;
Second transmitting element, for the audio-video signal that described control signal is specified being sent to display device according to described control signal, the audio-video signal after the audio-video signal that described control signal is specified comprises the modulation of described first Set Top Box transmission or described second Set Top Box receive the audio-video signal that external signal exports after treatment.
17. devices according to claim 16, is characterized in that, described demodulating unit comprises: demodulation amplification module, described demodulating unit specifically for,
Control signal after described modulation is processed through demodulation amplification module, obtains described control signal.
18. devices according to claim 17, is characterized in that,
Described second receiving element is also for receiving the control index signal that described first Set Top Box sends, and described control index signal is used to indicate described first Set Top Box and controls described second Set Top Box;
Described second transmitting element is also for generating the feedback signal of described control index signal according to described control index signal and being sent to described first Set Top Box by described coaxial line.
19. devices according to any one of claim 16-18, is characterized in that,
Described second receiving element is also for receiving the heartbeat instruction that described first Set Top Box is sent by described coaxial line;
Described second transmitting element also for generating the feedback signal of described heartbeat instruction according to described heartbeat instruction, and sends to described first Set Top Box by described coaxial line.
20. devices according to claim 18, is characterized in that, described device also comprises:
Second linkage unit, for connecting with described first Set Top Box;
Described second receiving element is also for receiving the test link order that described first Set Top Box sends by coaxial line, described test link order comprises the chipID information of described first Set Top Box;
Described second transmitting element also receives instruction for generating to connect according to described test link order, and by described coaxial line, described connection reception instruction being sent to described first Set Top Box, described connection receives the chipID information that instruction comprises described second Set Top Box;
Second dispensing unit, for after receiving the second activation instruction, be configured according to described second activation instruction, described second activation instruction is for activating the data transmission device of described second Set Top Box, and described second activation instruction comprises the chipID information of described second Set Top Box.
21. 1 kinds of data transmission systems, is characterized in that, described Set Top Box control system comprises: the first Set Top Box, the second Set Top Box, at least one display device and coaxial line, wherein,
Described first Set Top Box connects described second Set Top Box by described coaxial line, and described second Set Top Box connects display device;
Described first Set Top Box is used for audio-video signal to be modulated to the first frequency range, control signal is modulated to the second frequency range, wherein said first frequency range and described second frequency range do not interfere with each other, and by described coaxial line, the described audio-video signal after modulation and described control signal are transferred to described second Set Top Box simultaneously;
Described second Set Top Box is used for receiving the described audio-video signal after the modulation of described first Set Top Box transmission and described control signal by described coaxial line, described control signal after the modulation that described in demodulation, the first Set Top Box sends, according to described control signal, the audio-video signal that described control signal is specified is sent to display device, the audio-video signal after the audio-video signal that described control signal is specified comprises the modulation of described first Set Top Box transmission or described second Set Top Box receive the audio-video signal that external signal exports after treatment.
22. systems according to claim 21, is characterized in that,
Described first Set Top Box comprises the data transmission device as described in claim 6-10;
Described second Set Top Box comprises the data transmission device as described in claim 16-20.
CN201510658655.2A 2015-10-12 2015-10-12 Method, device and system for data transmission Pending CN105282605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510658655.2A CN105282605A (en) 2015-10-12 2015-10-12 Method, device and system for data transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510658655.2A CN105282605A (en) 2015-10-12 2015-10-12 Method, device and system for data transmission

Publications (1)

Publication Number Publication Date
CN105282605A true CN105282605A (en) 2016-01-27

Family

ID=55150799

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510658655.2A Pending CN105282605A (en) 2015-10-12 2015-10-12 Method, device and system for data transmission

Country Status (1)

Country Link
CN (1) CN105282605A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1523827A (en) * 2003-01-23 2004-08-25 三星电子株式会社 Remote controller and set-top-box therefor
CN101010955A (en) * 2004-08-31 2007-08-01 汤姆森许可贸易公司 Configuration management for co-located network systems
CN201001143Y (en) * 2006-03-03 2008-01-02 王寅 Multi-region extending system for remote control signal and video-audio signal of set up box
JP2009088615A (en) * 2007-09-27 2009-04-23 Funai Electric Co Ltd Content distribution system, moving image distribution system, and content distribution method
CN102186047A (en) * 2011-04-25 2011-09-14 中兴通讯股份有限公司 Coaxial-cable-based Internet protocol television (IPTV) home network system and data processing method thereof
CN103945235A (en) * 2014-04-11 2014-07-23 深圳创维数字技术股份有限公司 Digital television control method and system and set top boxes
CN204377073U (en) * 2015-01-28 2015-06-03 井冈山电器有限公司 A kind of Set Top Box control system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1523827A (en) * 2003-01-23 2004-08-25 三星电子株式会社 Remote controller and set-top-box therefor
CN101010955A (en) * 2004-08-31 2007-08-01 汤姆森许可贸易公司 Configuration management for co-located network systems
CN201001143Y (en) * 2006-03-03 2008-01-02 王寅 Multi-region extending system for remote control signal and video-audio signal of set up box
JP2009088615A (en) * 2007-09-27 2009-04-23 Funai Electric Co Ltd Content distribution system, moving image distribution system, and content distribution method
CN102186047A (en) * 2011-04-25 2011-09-14 中兴通讯股份有限公司 Coaxial-cable-based Internet protocol television (IPTV) home network system and data processing method thereof
CN103945235A (en) * 2014-04-11 2014-07-23 深圳创维数字技术股份有限公司 Digital television control method and system and set top boxes
CN204377073U (en) * 2015-01-28 2015-06-03 井冈山电器有限公司 A kind of Set Top Box control system

Similar Documents

Publication Publication Date Title
CN105308673B (en) For managing the method for the output in HDMI sources, system and medium
KR101113120B1 (en) Apparatus and method to control devices using a portable terminal in a device automation system
US20080297655A1 (en) Television receiving apparatus and device control method
CN104080004A (en) Method and system for remotely controlling child locking function of smart television
US9369752B2 (en) System and method for controlling a plurality of media devices
KR102357597B1 (en) Auto pairing method and system between the IPTV set-top box and a Bluetooth remote controller
CN105100848A (en) Intelligent equipment, and intelligent equipment control system and realization method thereof
CN105592348A (en) Automatic switching method for screen transmission signals and screen transmission signal receiver
US20140189892A1 (en) Communication device and communication system
WO2021244018A1 (en) Camera sharing method, smart home control method, and system
TW201034456A (en) System and method for entertainment system reconfiguration
CN107197077B (en) Method, device and system for communication between devices
CN106034251B (en) A kind of control method and device of set-top box
CN104301766A (en) Remote control matching system and method based on smart television
CN105516796B (en) set-top box multi-screen interactive management method and system
CN109155872A (en) Information processing equipment, television receiver, information processing system and message handling program
CN107948692A (en) A kind of control method, system, set-top box and storage medium for cascading set-top box
CN105282605A (en) Method, device and system for data transmission
CN106792060A (en) The control method and device of external equipment
CN102694816A (en) Method, device and system for implementing remote user interface
CN111147879B (en) Live program caching method, system, equipment and computer storage medium
US20220030300A1 (en) Quick streaming reconnect by preserving streaming context on app exit
CN107018346B (en) Signal response method and device
CN113132774B (en) Control method of intelligent television and related equipment
CN103607623A (en) Long-distance infrared remote control method and system of set top box

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20160127