CN101325674A - Method and apparatus for receiving television signal - Google Patents
Method and apparatus for receiving television signal Download PDFInfo
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- CN101325674A CN101325674A CNA2007100090915A CN200710009091A CN101325674A CN 101325674 A CN101325674 A CN 101325674A CN A2007100090915 A CNA2007100090915 A CN A2007100090915A CN 200710009091 A CN200710009091 A CN 200710009091A CN 101325674 A CN101325674 A CN 101325674A
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Abstract
The invention discloses a receiving method and a receiving device for television signals. A receiving device for television signals is disclosed, the television signal comprises two sorts of signals, the former is China digital television terrestrial broadcasting DMB-TH transmission signal and the latter is digital cable transmission signal; the receiving device comprises a CPU, a DMB-TH tuning unit, a DMB-TH channel demodulation unit, a DVB-C tuning unit, a DVB-C channel demodulation unit and a MPEG decoding unit. The receiving device according to the technical proposal of the invention, on account of being able to receive DMB-TH or DVB-C information according to a CPU instruction, not only settles the disadvantage that two sets of receiving device must be mounted respectively at the same time for receiving both DMB-TH and DVB-C in background technique, but sufficiently utilizes the same hardware resources and software resources in both of them on the ground of analysis to the receiving devices having such two transmission criterions, thus remarkably lessening receiving cost of the two transmission criterions signals and saving the resources.
Description
Technical field
The present invention relates to a kind of television signal receiving method and receiving system, particularly relate to a kind of China Digital TV terrestrial broadcasting DMB-TH transmission information that can receive and to receive method of reseptance and the receiving system that digital cable DVB-C transmits information again.
Background technology
China Digital TV ground broadcast transfer system (DMB-TH) standard GB20600-2006 formally is approved for mandatory national standard, and requires in enforcement on August 1 in 2007.Simultaneously, Digital Television wired broadcasting (DVB-C) is broadcasted in various places.At two kinds of above-mentioned transmission standards, all be to adopt independent receive mode to watch at present, as watching, be embedded in the television set as function and watch, as watching by PC by the form of plug-in card (comprising the PCI plug-in card) with set-top box by set-top box.Since the above-mentioned mode of watching can only receive these two kinds of transmission standards one of them, therefore the user should watch that DMB-TH will watch that also DVB-C just must set two cover receiving systems simultaneously respectively, and this has not only improved the user and has watched cost, watches trouble, inconvenience but also cause.
Summary of the invention
The invention provides a kind of television signal receiving method and receiving system, its DMB-TH that should watch that has overcome background technology will watch that also DVB-C just must set the deficiency of two cover receiving systems simultaneously respectively.
The technical solution adopted for the present invention to solve the technical problems is: a kind of television signal receiving method, TV signal include two kinds, and first kind is China Digital TV terrestrial broadcasting DMB-TH transmission signals, and second kind is digital cable DVB-C transmission signals; This method of reseptance comprises:
P100 sends the instruction step, and CPU sends first instruction or second instruction, as sends first and instruct then execution in step P200, as sends second and instruct then execution in step P400;
P200, the tuning step of DMB-TH, CPU selects also to be provided with the DMB-TH tuned cell, and the DMB-TH tuned cell receives the DMB-TH transmission signals, and is first intermediate-freuqncy signal with the frequency conversion of DMB-TH transmission signals;
P300, the DMB-TH demodulation step, DMB-TH channel demodulation unit receives and handles first intermediate-freuqncy signal to obtain transport stream, carries out P600 then;
P400, the tuning step of DVB-C, CPU selects also to be provided with the DVB-C tuned cell, and the DVB-C tuned cell receives the DVB-C transmission signals, and is second intermediate-freuqncy signal with the frequency conversion of DVB-C transmission signals;
P500, the DVB-C demodulation step, DVB-C channel demodulation unit receives and handles second intermediate-freuqncy signal to obtain transport stream, carries out P600 then;
P600, the mpeg decode step, the mpeg decode unit receives and the decoding transport stream.
In a preferred embodiment of the present invention, also comprise:
P000 selects step, and P000 selects step, and the television set man-machine interface receives extraneous order, and CPU judges and carries out extraneous order, sends first instruction and or second instruction according to the command execution situation.
The technical solution adopted for the present invention to solve the technical problems is: a kind of TV signal receiver, TV signal include two kinds, and first kind is China Digital TV terrestrial broadcasting DMB-TH transmission signals, and second kind is digital cable DVB-C transmission signals;
This receiving system comprises CPU, DMB-TH tuned cell, DMB-TH channel demodulation unit, DVB-C tuned cell, DVB-C channel demodulation unit and mpeg decode unit;
CPU sends first instruction or second instruction, as sends first instruction and then call the DMB-TH tuned cell, as sends second instruction and then call the DVB-C tuned cell;
The DMB-TH tuned cell receives the DMB-TH transmission signals, and is first intermediate-freuqncy signal with the frequency conversion of DMB-TH transmission signals; DMB-TH channel demodulation unit receives and handles first intermediate-freuqncy signal to obtain transport stream;
The DVB-C tuned cell receives the DVB-C transmission signals, and is second intermediate-freuqncy signal with the frequency conversion of DVB-C transmission signals;
DVB-C channel demodulation unit receives and handles second intermediate-freuqncy signal to obtain transport stream;
The mpeg decode unit receives and the decoding transport stream.
In a preferred embodiment of the present invention, this DMB-TH tuned cell and DVB-C tuned cell are combined and are formed difunctional tuner, and pass through Instruction Selection.
In a preferred embodiment of the present invention, this DMB-TH channel demodulation unit and DVB-C channel demodulation unit combination form difunctional channel demodulator together, and pass through Instruction Selection.
In a preferred embodiment of the present invention, this DMB-TH tuned cell and DMB-TH channel demodulation unit integrate and constitute first module, this DVB-C tuned cell and DVB-C channel demodulation unit integrate and constitute second module, this first module and second module are integrated in the complete machine, and pass through Instruction Selection.
In a preferred embodiment of the present invention, this DMB-TH channel demodulation unit, DVB-C channel demodulation unit are integrated in system's primary processor, and by inner Instruction Selection.
The receiving system of technical solution of the present invention, because can be according to cpu instruction selective reception DMB-TH or DVB-C information, therefore not only solved the existing DMB-TH that should watch of background technology and will watch that also DVB-C just must set the deficiency of two cover receiving systems simultaneously respectively, but also on the receiving equipment basis of analyzing these two kinds of transmission standards, make full use of both identical hardware resource and software resource, effectively reduce the reception cost of these two kinds of transmission standards, saved resource.MB-TH, DVB-C tuned cell are combined and are formed difunctional tuner, DMB-TH, DVB-C channel demodulation unit combination and form difunctional demodulator together, can reduce the reception cost of these two kinds of transmission standard signals, economize on resources.DMB-TH tuned cell, channel demodulation unit integrate and constitute first module, DVB-C tuned cell, channel demodulation unit integrate and constitute second module, first module and second module are integrated in the complete machine, can reduce the reception cost of these two kinds of transmission standard signals, economize on resources.DMB-TH channel demodulation unit, DVB-C channel demodulation unit are integrated in system's primary processor, can reduce the reception cost of these two kinds of transmission standard signals, economize on resources.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
The principle schematic of the TV signal receiver of the preferred embodiment that Fig. 1 has illustrated.
The principle schematic of the television signal receiving method of the preferred embodiment that Fig. 2 has illustrated.
The DMB-TH signal program method for searching principle flow chart of the preferred embodiment that Fig. 3 has illustrated.
The DVB-C signal program method for searching principle flow chart of the preferred embodiment that Fig. 4 has illustrated.
The DMB-TH signal program processing procedure principle flow chart of the preferred embodiment that Fig. 5 has illustrated.
The DVB-C signal program processing procedure principle flow chart of the preferred embodiment that Fig. 6 has illustrated.
The principle schematic of the band PIP signal receiving device of the preferred embodiment that Fig. 7 has illustrated.
Embodiment
TV signal includes two kinds, and first kind is China Digital TV terrestrial broadcasting DMB-TH transmission signals, and second kind is digital cable DVB-C transmission signals, the information source unanimity of these two kinds of transmission standards, and difference is the coding/decoding of channel and signal.In the present embodiment, this transmission signals had both comprised video-audio program, also comprised data broadcasting service etc.See also Fig. 1, the principle schematic of the TV signal receiver of the preferred embodiment that Fig. 1 has illustrated.A kind of TV signal receiver, comprise system's primary processor 100, DMB-TH tuned cell 200, DMB-TH channel demodulation unit 300, DVB-C tuned cell 400 and DVB-C channel demodulation unit 500, have CPU110, mpeg decode unit 120 and display engine module 130 in this system's primary processor.
CPU sends control command, and control command selects to call DMB-TH tuned cell or DVB-C tuned cell.The DMB-TH tuned cell receives DMB-TH ground radio-frequency transmission signals, and is first intermediate-freuqncy signal with the radio-frequency transmission signals frequency conversion of DMB-TH ground; DMB-TH channel demodulation unit receives and handles first intermediate-freuqncy signal to obtain transport stream.The DVB-C tuned cell receives DVB-C wire radio transmission signals, and is second intermediate-freuqncy signal with the frequency conversion of DVB-C wire radio transmission signals; DVB-C channel demodulation unit receives and handles second intermediate-freuqncy signal to obtain transport stream.The mpeg decode unit receives and the decoding transport stream, and CPU delivers to display engine module 130 with decoded picture material, and display engine module 130 is delivered to display screen 600 with video data, and voice data is delivered to loudspeaker, to reappear video and audio frequency.Wherein, this DMB-TH tuned cell and DVB-C tuned cell can be combined in and form difunctional tuner together, and select by the CPU control command.In another preferred embodiment, this DMB-TH channel demodulation unit and DVB-C channel demodulation unit combination form difunctional channel demodulator together, and select by the CPU control command.Again in the preferred embodiment, this DMB-TH tuned cell and DMB-TH channel demodulation unit integrate and constitute first module, this DVB-C tuned cell and DVB-C channel demodulation unit integrate and constitute second module, this first module and second module are integrated in the complete machine, and select by the CPU control command.Also in the preferred embodiment, this DMB-TH channel demodulation unit, DVB-C channel demodulation unit are integrated in system's primary processor, and select by the control command of CPU inside.
This receiving system can receive the signal of above-mentioned two kinds of transmission standards, and can as required this device be applied to set-top box, or directly applies to digital TV integrated machine.
See also Fig. 2, the principle schematic of the television signal receiving method of the preferred embodiment that Fig. 2 has illustrated.A kind of television signal receiving method, this method of reseptance comprises:
P000 selects step, television set man-machine interface to receive extraneous order, and CPU judges and also carry out extraneous order, according to the command execution situation send first instruction and or second instruction;
P100 sends the instruction step, and CPU sends first instruction or second instruction, as sends first and instruct then execution in step P200, as sends second and instruct then execution in step P400;
P200, the tuning step of DMB-TH, first Instruction Selection, setting and control DMB-TH tuned cell receive the DMB-TH transmission signals, and the DMB-TH transmission signals that receives is carried out high-frequency tuning and frequency conversion, obtain and export first intermediate-freuqncy signal;
P300, the DMB-TH demodulation step, CPU sends the 3rd instruction, the 3rd Instruction Selection, setting and control DMB-TH channel demodulation unit, first intermediate-freuqncy signal that receives is carried out analog-to-digital conversion, and channel-decoding is to obtain transport stream, and this channel-decoding process comprises successively: TDS-OFDM demodulation, inverse fourier transform, error correction decoding, deinterleaving are recovered, carried out to carrier lock and synchronizing signal, output transport stream is carried out P600 then;
P400, the tuning step of DVB-C, second Instruction Selection, setting and control DVB-C tuned cell receive the DVB-C transmission signals, and the DVB-C transmission signals that receives is carried out high-frequency tuning and frequency conversion, obtain and export second intermediate-freuqncy signal;
P500, the DVB-C demodulation step, CPU sends the 4th instruction, the 4th Instruction Selection, setting and control DVB-C channel demodulation unit, second intermediate-freuqncy signal that receives is carried out analog-to-digital conversion, and channel-decoding is to obtain transport stream, and this channel-decoding process comprises successively: carrier lock and synchronizing signal are recovered, are carried out QAM demodulation, Signal Matching filtering and equilibrium, differential decoding, symbol and decode and go at random to byte mapping, convolution de-interleaving, RS, output transport stream is carried out P600 then;
P600, the mpeg decode step, the mpeg decode unit 120 of primary processor 100 obtains the transport stream of this signal, and demodulation multiplexer decoding transport stream is provided with built-in demodulation multiplexer to obtain video PID, audio frequency PID and reference clock PID, demodulation multiplexer demultiplexing video PID, audio frequency PID, obtain video ES and audio ES, the video ES that Video Decoder receives demultiplexing decodes the output video video data, audio decoder receives the audio ES of demultiplexing and decodes the output sound data; Start the audio-visual synchronization monitoring.
Receive the concrete application that method for searching and method for receiving and processing signal are introduced signal acceptance method below in conjunction with signal.
A kind of signal receives method for searching:
A010, the entering signal search step is sent to CPU by man-machine interface (searching the OSD menu as enter program by main frame button, remote controller key) and to be entered program and search the order of OSD menu, and CPU receives and fill order;
A020, options step is provided, CPU calls program and searches the OSD menu, display menu on display screen then, list a plurality of options (mode of operation) on the menu for user's selection, those options adopt the textual representation that can distinguish DMB-TH signal and DVB-C signal, be respectively " ground " (ground DMB-TH signal is searched in expression) as option, " wired " (wired DVB-C signal is searched in expression), " ground+wired " (ground DMB-TH signal is searched in expression earlier, automatically then search wired DVB-C signal after the end), " wired+ground " (wired DVB-C signal is searched in expression earlier, then searches ground DMB-TH signal after the end automatically);
A030 selects step, and the television set man-machine interface receives one of option of extraneous input, CPU judges extraneous order, and the mode of operation of system's primary processor response and record option is switched the transport stream switching circuit, and then enter the order of program search OSD menu, wherein:
Search if mode of operation is " ground ", then carry out DMB-TH signal program search process;
Search if mode of operation is " wired ", then carry out DVB-C signal program search process;
Search if mode of operation is " ground "+" wired ", then carry out DMB-TH signal program search process earlier, carry out DVB-C signal program search process after executing again;
Search if mode of operation is " wired "+" ground ", then carry out DVB-C signal program search process earlier, carry out DMB-TH signal program search process after executing again.
Please refer to Fig. 3, Fig. 3 has illustrated DMB-TH signal program search process principle flow chart.DMB-TH signal program search process comprises:
A110, the beginning step, CPU calls program and searches the OSD menu;
A120, initialization step, the channel identication device A in the initializes memory;
A130, the tuning step of DMB-TH, " ground " search pattern of CPU is sent first instruction, first Instruction Selection, setting and control DMB-TH tuned cell, receive the DMB-TH transmission signals, the DMB-TH transmission signals that receives is carried out high-frequency tuning and frequency conversion, obtain and export first intermediate-freuqncy signal;
A140, the DMB-TH demodulation step, " ground " search pattern of CPU is sent the 3rd instruction, the 3rd Instruction Selection, setting and control DMB-TH channel demodulation unit, first intermediate-freuqncy signal that receives is carried out analog-to-digital conversion, channel-decoding is to obtain transport stream, and this channel-decoding process comprises successively: TDS-OFDM demodulation, inverse fourier transform, error correction decoding, deinterleaving, output transport stream are recovered, carried out to carrier lock and synchronizing signal;
A150 obtains data step, and primary processor carries out demultiplexing to the transport stream of input, extracts PSI information and SI information, and this PSI information becomes the data of channel A with the SI information architecture;
A160, storing step, the data of storage of channel A are in memory;
A170, determining step judges whether to search last channel, if, then carry out A190, if not, then carry out A180;
A180, the change step, A changes to succeeding channel with the channel identication device, then execution in step A130;
A190, end step finishes and withdraws from.
Please refer to Fig. 4, Fig. 4 has illustrated DVB-C signal program search process principle flow chart.DVB-C signal program search process comprises:
A210, the beginning step, CPU calls program and searches the OSD menu;
A220, initialization step, the channel identication device A in the initializes memory;
A230, the tuning step of DVB-C, " wired " search pattern of CPU are sent second instruction, second Instruction Selection, setting and control DVB-C tuned cell, receive the DVB-C transmission signals, the DVB-C transmission signals that receives is carried out high-frequency tuning and frequency conversion, obtain and export second intermediate-freuqncy signal;
A240, the DVB-C demodulation step, " wired " search pattern of CPU is sent the 4th instruction, the 4th Instruction Selection, setting and control DMB-TH channel demodulation unit, second intermediate-freuqncy signal that receives is carried out analog-to-digital conversion, channel-decoding is to obtain transport stream, this channel-decoding process comprises successively: QAM demodulation, Signal Matching filtering and equilibrium, differential decoding are recovered, carried out to carrier lock and synchronizing signal, symbol is to byte mapping, convolution de-interleaving, RS decoding and remove at random output transport stream;
A250 obtains data step, and primary processor carries out demultiplexing to the transport stream of input, extracts PSI information and SI information, and this PSI information becomes the data (corresponding physical channel B) of channel A with the SI information architecture;
A260, storing step, the data of storage of channel A are in memory;
A270, determining step judges whether to search last channel, if, then carry out A290, if not, then carry out A280;
A280, the change step, A changes to succeeding channel with the channel identication device, then execution in step A230;
A290, end step finishes and withdraws from.
Among another embodiment, mode of operation also can adopt following method to determine in a kind of signal reception method for searching: remote controller is provided with at the mode key of DMB-TH signal and DVB-C signal (being equal to above-mentioned option); The user presses mode key, and the television set man-machine interface receives one of option of extraneous input, and CPU judges external world's order, and the mode of operation of system's primary processor response and record option is switched the transport stream switching circuit, and then enters the order of program search OSD menu.
A kind of method for receiving and processing signal,
B010 selects step, and the user sends the order of selecting certain program by man-machine interface (as selecting program by the channel add-substract key of main frame, the channel add-substract key of remote controller) to CPU; Wherein:
If signal receives method for searching for searching the mode of operation on " ground ", then program is arranged as: DMB-TH program 1-DMB-TH program 2.。。。。。Last program of DMB-TH program---DMB-TH program 1;
If signal receives method for searching for searching the mode of operation of " wired ", then program is arranged as: DVB-C program 1-DVB-C program 2.。。。。。Last program of DVB-C program--DVB-C program 1;
If signal receives method for searching for searching " ground "+" wired's " mode of operation, then program is arranged as: DMB-TH program 1--DMB-TH program 2.。。。。。Last program of DMB-TH program-DVB-C program 1--DVB-C program 2.。。。。。Last program of DVB-C program--DMB-TH program 1;
If signal receives method for searching for searching the mode of operation on " wired "+" ground ", then program is arranged as: VB-C program 1--DVB-C program 2.。。。。。Last program of DVB-C program-DMB-TH program 1--DMB-TH program 2.。。。。。Last program of DMB-TH program--DMB-TH program 1;
B020, commands steps, CPU receives and fill order, if selection is " ground " program, then carries out DMB-TH signal program processing procedure; If what select is " wired " program, then carry out DVB-C signal program processing procedure.
Please refer to Fig. 5, Fig. 5 has illustrated DMB-TH signal program processing procedure principle flow chart.A kind of DMB-TH signal program processing procedure (for example the program of Xuan Zeing is A):
B110, beginning step, beginning;
B120, initialization step, CPU obtain program A corresponding physical channel B from memory;
B130, the tuning step of DMB-TH, CPU output is to first control command of physical channel B, first control command is selected, is provided with and control DMB-TH tuned cell, receive the DMB-TH transmission signals, the DMB-TH transmission signals that receives is carried out high-frequency tuning and frequency conversion, obtain and export first intermediate-freuqncy signal;
B140, the DMB-TH demodulation step, CPU output is to the 3rd control command of physical channel B, the 3rd control command is selected, is provided with and control DMB-TH channel demodulation unit, first intermediate-freuqncy signal that receives is carried out analog-to-digital conversion, channel-decoding is to obtain transport stream, this channel-decoding process comprises successively: QAM demodulation, Signal Matching filtering and equilibrium, differential decoding are recovered, carried out to carrier lock and synchronizing signal, symbol is to byte mapping, convolution de-interleaving, RS decoding and remove at random output transport stream;
B150, the mpeg decode step, the mpeg decode unit 120 of primary processor 100 obtains the transport stream of this signal, and demodulation multiplexer decoding transport stream is provided with built-in demodulation multiplexer to obtain video PID, audio frequency PID and Program Clock Reference PID, demodulation multiplexer demultiplexing video PID, audio frequency PID, obtain video ES and audio ES, the video ES that Video Decoder receives demultiplexing decodes the output video video data, audio decoder receives the audio ES of demultiplexing and decodes output sound; Start the audio-visual synchronization monitoring;
B160, end step finishes and withdraws from.
Please refer to Fig. 6, Fig. 6 has illustrated DVB-C signal program processing procedure principle flow chart.A kind of DVB-C signal program processing procedure (for example the program of Xuan Zeing is A):
B210, beginning step, beginning;
B220, initialization step, CPU obtain program A corresponding physical channel B from memory;
B230, the tuning step of DVB-C, CPU output is to second control command of physical channel B, second control command is selected, is provided with and control DVB-C tuned cell, receive the DVB-C transmission signals, the DVB-C transmission signals that receives is carried out high-frequency tuning and frequency conversion, obtain and export second intermediate-freuqncy signal;
B240, the DVB-C demodulation step, CPU output is to the 4th control command of physical channel B, the 4th control command is selected, is provided with and control DVB-C channel demodulation unit, second intermediate-freuqncy signal that receives is carried out analog-to-digital conversion, channel-decoding is to obtain transport stream, and this channel-decoding process comprises successively: TDS-OFDM demodulation, inverse fourier transform, error correction decoding, deinterleaving, output transport stream are recovered, carried out to carrier lock and synchronizing signal;
B250, the mpeg decode step, the mpeg decode unit 120 of primary processor 100 obtains the transport stream of this signal, and demodulation multiplexer decoding transport stream is provided with built-in demodulation multiplexer to obtain video PID, audio frequency PID and Program Clock Reference PID, demodulation multiplexer demultiplexing video PID, audio frequency PID, obtain video ES and audio ES, the video ES that Video Decoder receives demultiplexing decodes the output video video data, audio decoder receives the audio ES of demultiplexing and decodes the output sound data; Start the audio-visual synchronization monitoring;
B260, end step finishes and withdraws from.
Among another embodiment, program selects also can adopt following method to determine in a kind of signal processing method for searching: the user presses the rendition list key or similar functions key, and the machine response also shows an OSD menu, and the program on the menu is arranged and shown according to search pattern.If search pattern is " ground ", then show the DMB-TH program; If search pattern is " wired ", then show the DVB-C program; If search pattern is " ground+wired ", before then the DMB-TH program is arranged in, after the DVB-C program is arranged in; If search pattern is " wired+ground ", before then the DVB-C program is arranged in, after the DMB-TH program is arranged in.Menu supports multipage to show to hold all programs.The user browses at the program item by directionkeys, chooses program by acknowledgement key, finishes the program process of selecting.
Among the embodiment, program selects also can adopt following method to determine in a kind of signal processing method for searching again: the user is by the mode key on the remote controller or pass through the mode of operation that path OSD menu is selected machine: DMB-TH pattern or DVB-C pattern.After determining mode of operation, the user has following three kinds of modes to select program: 1) show the program of corresponding modes by the rendition list key, browse at the program item by directionkeys, choose program by acknowledgement key, finish the program process of selecting.2) between the program of corresponding modes, select and switch by the channel add-substract key.3) by numerical key input program identification number, confirm input or time overtime after, machine is accepted input and search the program that number is complementary with program identification in the library of programmes of corresponding modes, finishes the program process of selecting.
One support among the picture-in-picture embodiment again, two mpeg decode unit are contained in primary processor 100 inside, be respectively the first mpeg decode unit 120 and the second mpeg decode unit 140, the 2nd MPEG that DMB-TH channel demodulation unit 300 transport stream are exported to band in the primary processor 100 looks audio decoding unit 140, DVB-C channel demodulation unit 500 transport stream are looked audio decoding unit 120, the one MPEG for MPEG of band in the primary processor 100 and are looked audio decoding unit 120 decoded video contents and the 2nd MPEG and look audio decoding unit 140 decoded video contents and export at display engine module 130 superpositions.Like this, finish simultaneously receiving, watch DMB-TH ground digital program and DVB-C cabled digital program process.
The above, only for preferred embodiment of the present invention, so can not limit scope of the invention process with this, i.e. the equivalence of doing according to the present patent application claim and description changes and modification, all should still belong in the scope that patent of the present invention contains.
Claims (7)
1. television signal receiving method, TV signal includes two kinds, and first kind is China Digital TV terrestrial broadcasting DMB-TH transmission signals, and second kind is digital cable DVB-C transmission signals; It is characterized in that: this method of reseptance comprises:
P100 sends the instruction step, and CPU sends first instruction or second instruction, as sends first and instruct then execution in step P200, as sends second and instruct then execution in step P400;
P200, the tuning step of DMB-TH, CPU selects also to be provided with the DMB-TH tuned cell, and the DMB-TH tuned cell receives the DMB-TH transmission signals, and is first intermediate-freuqncy signal with the frequency conversion of DMB-TH transmission signals;
P300, the DMB-TH demodulation step, DMB-TH channel demodulation unit receives and handles first intermediate-freuqncy signal to obtain transport stream, carries out P600 then;
P400, the tuning step of DVB-C, CPU selects also to be provided with the DVB-C tuned cell, and the DVB-C tuned cell receives the DVB-C transmission signals, and is second intermediate-freuqncy signal with the frequency conversion of DVB-C transmission signals;
P500, the DVB-C demodulation step, DVB-C channel demodulation unit receives and handles second intermediate-freuqncy signal to obtain transport stream, carries out P600 then;
P600, the mpeg decode step, the mpeg decode unit receives and the decoding transport stream.
2. a kind of television signal receiving method according to claim 1 is characterized in that: also comprise:
P000 selects step, and the television set man-machine interface receives extraneous order, and CPU judges and carries out extraneous order, sends first instruction and or second instruction according to the command execution situation.
3. TV signal receiver, TV signal includes two kinds, and first kind is China Digital TV terrestrial broadcasting DMB-TH transmission signals, and second kind is digital cable DVB-C transmission signals; It is characterized in that: this receiving system comprises CPU, DMB-TH tuned cell, DMB-TH channel demodulation unit, DVB-C tuned cell, DVB-C channel demodulation unit and mpeg decode unit;
CPU sends first instruction or second instruction, as sends first instruction and then call the DMB-TH tuned cell, as sends second instruction and then call the DVB-C tuned cell;
The DMB-TH tuned cell receives the DMB-TH transmission signals, and is first intermediate-freuqncy signal with the frequency conversion of DMB-TH transmission signals;
DMB-TH channel demodulation unit receives and handles first intermediate-freuqncy signal to obtain transport stream;
The DVB-C tuned cell receives the DVB-C transmission signals, and is second intermediate-freuqncy signal with the frequency conversion of DVB-C transmission signals;
DVB-C channel demodulation unit receives and handles second intermediate-freuqncy signal to obtain transport stream;
The mpeg decode unit receives and the decoding transport stream.
4. a kind of TV signal receiver according to claim 3 is characterized in that: this DMB-TH tuned cell and DVB-C tuned cell are combined and are formed difunctional tuner, and pass through Instruction Selection.
5. a kind of TV signal receiver according to claim 3 is characterized in that: this DMB-TH channel demodulation unit and DVB-C channel demodulation unit combination form difunctional channel demodulator together, and pass through Instruction Selection.
6. a kind of TV signal receiver according to claim 3, it is characterized in that: this DMB-TH tuned cell and DMB-TH channel demodulation unit integrate and constitute first module, this DVB-C tuned cell and DVB-C channel demodulation unit integrate and constitute second module, this first module and second module are integrated in the complete machine, and pass through Instruction Selection.
7. a kind of TV signal receiver according to claim 3 is characterized in that: this DMB-TH channel demodulation unit, DVB-C channel demodulation unit are integrated in system's primary processor, and by inner Instruction Selection.
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| CNA2007100090915A CN101325674A (en) | 2007-06-11 | 2007-06-11 | Method and apparatus for receiving television signal |
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| CNA2007100090915A CN101325674A (en) | 2007-06-11 | 2007-06-11 | Method and apparatus for receiving television signal |
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| CN (1) | CN101325674A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977289A (en) * | 2010-10-28 | 2011-02-16 | 中兴通讯股份有限公司 | Method, device, system and equipment for processing multiple-television-system signals |
| CN103281495A (en) * | 2013-05-14 | 2013-09-04 | 无锡北斗星通信息科技有限公司 | Digital television receiver compatible with DVB (Digital Video Broadcasting) and ATSC (Advanced Television Systems Committee) standards |
| CN104661051A (en) * | 2015-03-09 | 2015-05-27 | 深圳市九洲电器有限公司 | Streaming media pushing method and system |
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
-
2007
- 2007-06-11 CN CNA2007100090915A patent/CN101325674A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977289A (en) * | 2010-10-28 | 2011-02-16 | 中兴通讯股份有限公司 | Method, device, system and equipment for processing multiple-television-system signals |
| WO2012055180A1 (en) * | 2010-10-28 | 2012-05-03 | 中兴通讯股份有限公司 | Method, apparatus, system and device for processing multiple- tv-standard signals |
| CN103281495A (en) * | 2013-05-14 | 2013-09-04 | 无锡北斗星通信息科技有限公司 | Digital television receiver compatible with DVB (Digital Video Broadcasting) and ATSC (Advanced Television Systems Committee) standards |
| CN103281495B (en) * | 2013-05-14 | 2016-06-01 | 海安华厚电子科技有限公司 | The digital television receiver of compatible with DVB, ATSC standard |
| CN104661051A (en) * | 2015-03-09 | 2015-05-27 | 深圳市九洲电器有限公司 | Streaming media pushing method and system |
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
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Application publication date: 20081217 |