CN101459789A - Channel searching method based on DTMB standard and digital television receiver - Google Patents
Channel searching method based on DTMB standard and digital television receiver Download PDFInfo
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Abstract
The invention discloses a method for searching frequency channels based on the DTMB standard, which receives the frequency channel number which needs to be searched from a frequency channel management system through a front end system, the method comprises the following steps: firstly searching in a single carrier mode and then searching in a multi-carrier mode or firstly searching in a multi-carrier more and then searching in a simple carrier mode, when one of the mode is locked, the current mode is recorded to the communication parameter, and the current value of the communication channel parameter is stored to storage medium through the frequency channel management system, during the switching of the frequency channel, the front end system receives the frequency channel number and the communication channel parameter of the switching frequency channel at the frequency channel management system, and directly sets the modulating mode of the current frequency channel according to the communication channel parameter, and carries out the frequency channel switching through entering the mode. Correspondingly, the invention further provides a digital television receiving machine based on the DTMB standard, thereby the invention realizes the technical proposal of searching the frequency channel under the condition that modes of the two carriers exist, which improves the speed of the frequency channel switching.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of channel searching method and a kind of digital television receiver based on the DTMB standard based on DTMB (Digital MultimediaBroadcasting, T-DMB) standard.
Background technology
China digital TV ground transmission standard DTMB (GB20600-2006) has adopted the integration technology of single carrier and multicarrier.In some zone, Channel Transmission may not only adopt single carrier but also adopt multicarrier, requires the digital television receiver front end system to support two kinds of carrier modes simultaneously.
And, having generally included two stages for the channel searching method that carries out according to the DTMB standard: the phase I is the channel search stage, and second stage is the channel switch step.
As shown in Figure 1, the channel search stage, front end system 101 receives the channel that needs channel searching from channel manage system 102, under current channel channel parameter condition of unknown, search for automatically, behind the semaphore lock, notification channel management system 102, to pass to channel manage system 102 by the current channel channel parameter that search obtains simultaneously preserves, these channel channel parameters are stored in the storage medium 103, and flow to business information resolution system 104 by front end system 101 output TS (Transport Stream, transport stream).
As shown in Figure 2, the channel switch step, front end system 101 receives channel and the channel parameter that is stored in the switching channels the storage medium 103 from channel manage system 102, under the known situation of switching channels channel parameter, manually be provided with, behind the semaphore lock, notification channel management system 102, and flow to business information resolution system 104 by front end system 101 output TS.
At application number is 200510069908.9, denomination of invention is in the Chinese patent application of " channel control apparatus of Digital Television and method thereof ", a kind of like this technical scheme is provided, in this invention, the packet identifier of video and audio signal by the storage digital TV channel, channel according to the user switches requirement extraction institute stored packet identifier, the corresponding video and audio signal of channel that output and user select, can reduce channel and switch required time, select rapidly or the desired channel of search subscriber.This technical scheme is to depend on the selection of user side to channel, according to the packet identifier of the video and audio signal of the corresponding television channel of the corresponding video and audio signal of selecting with the user of channel, the corresponding video and audio signal of channel that output and user select.Though this technical scheme can reduce the time of channel search,, under the situation of two carrier mode existence, still need to carry out two kinds of channels examination search under the carrier mode, need expend certain hour two kinds of carrier waves are selected.
At application number is 200410038161.6, denomination of invention is in the Chinese patent of " a kind of method of Digital Television manual search channel ", a kind of like this technical scheme is provided, in this invention, carry out following steps in digital television transmission system: client is isolated channel information and is given domain channel manager from the data that receive; User interface is passed to domain channel manager to current number of virtual channel; Domain channel manager is carried out the search of program and the result is passed to user interface from current physical channel; The programme information that user interface comes out search is shown in the user interface; User interface selects a programs to be set at the program of this virtual channel from content displayed.This invention is by providing a kind of method of Digital Television manual search channel, and the method that makes digital cable customers be convenient to use manual search is operated, and this scheme combines the characteristics of Digital Television, has good interactivity.Because this technical scheme is at Digital Television manual search channel, therefore, in some zone, Channel Transmission may not only adopt single carrier but also adopt under the situation of multicarrier, and it is too unaccommodated adopting this technical scheme to carry out channel search.
At application number is 200410052960.9, denomination of invention is in the Chinese patent of " search platform management system and search platform update method automatically automatically ", a kind of like this technical scheme is provided, in this invention, has related to automatic search platform management system and automatic search platform update method; Be the automatic search platform management system module pie graph of the digital satellite broadcasting OTA of the utilization that provides of this invention as shown in Figure 3; Above-mentioned automatic search platform management system uses the OTA service function in the digital satellite broadcasting in the renewal process of channel data, makes automatic search platform management and renewal easier.This system comprises: leading section 10, SI20, download apparatus 30, OTA management devices 40, channel update management devices 50, automatic searcher 60, channel editing device 70, systems soft ware save set 81, search platform device 82, and service data device 83.Wherein, corresponding is the information on services device 80 that control leading section 10 data flow are downloaded; The non-volatility memorizer of saved system software, above-mentioned automatic search platform and service parameter; According to the analysis of above-mentioned information on services device to OTA information in the data flow, whether the download of determination data stream, and the OTA management devices 40 that upgrades with this control system software or the automatic search platform of above-mentioned detailed content; Dose/the channel update management devices 50 of delete instruction according to the service parameter that the OTA analysis result of above-mentioned OTA management department is implemented above-mentioned non-volatile memory.This invention need not to upgrade whole system software when the new service of search, only need to upgrade associated chain-wales and get final product, and it is simple relatively therefore to upgrade operation.This invention utilizes OTA, and only the download by the automatic search platform of predefine just can the update service data, therefore search for and need not to upgrade whole system software in the new service process, only need to upgrade the chain-wales image promptly can, it is more simple therefore to upgrade operation.This invention is downloaded whole service data by OTA in addition, therefore cries under the fast situation in the less time of image and can finish download.After the OTA download platform, start automatic searcher and can append service, therefore, can only append the service of received signal.Can search for and delete the service of having interrupted automatically,, need not to append or change the whole compiling of altering system software, so the software translating management is than being easier to for simple service from the system management aspect.Though, this working of an invention has above-mentioned a plurality of beneficial effect, but the apparatus structure complexity that this invention provides, and be not provided under the situation that has two kinds of carrier modes, better select for use definite carrier mode to carry out the technical scheme of channel search, in some zone of two kinds of carrier mode coexistences, still can not provide the technical scheme of channel search faster.
In sum, exist not enoughly in the technical scheme of existing channel search based on the DTMB standard, need be improved.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide a kind of based on the DTMB standard channel searching method and based on the digital television receiver of DTMB standard, to be provided under the situation that two kinds of carrier modes exist, the technical scheme of carrying out channel search is to improve the speed that channel switches.
To achieve these goals, the invention provides a kind of channel searching method based on the DTMB standard, be used to comprise the digital television receiver of front end system, channel manage system, storage medium and business information resolution system, described method comprises:
The channel search step, described front end system receives the channel that needs search from described channel manage system, earlier with the single carrier mode search and then with the multi-carrier mode search or search for the multi-carrier mode search and then with single carrier mode earlier; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium by described channel manage system, finishes the search of current channel then, enters next channel search;
The channel switch step, described front end system receives the channel and the described channel parameter of switching channels from described channel manage system, and directly set the modulating mode of current channel according to described channel parameter, behind the semaphore lock, notify described channel manage system, output TS flows to described business information resolution system.
According to the channel searching method of DTMB standard of the present invention, described channel parameter is the channel mode parameter.
According to the channel searching method of DTMB standard of the present invention, in described channel search step, comprise that further the initial value of channel mode parameter is set step.
Channel searching method according to DTMB standard of the present invention, in the channel switch step, further comprise according to described channel parameter and carry out the carrier mode determining step, if single carrier mode, then described front end system enters single carrier mode, if multi-carrier mode, then described front end system enters multi-carrier mode.
In order to realize above-mentioned another goal of the invention, the invention provides a kind of digital television receiver based on the DTMB standard, the digital television receiver that comprises front end system, channel manage system, storage medium and business information resolution system, described front end system receives the channel that needs search from described channel manage system, earlier with the single carrier mode search and then with the multi-carrier mode search or search for the multi-carrier mode search and then with single carrier mode earlier; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium by described channel manage system, finishes the search of current channel then, enters next channel search; Described front end system receives the channel and the described channel parameter of switching channels from described channel manage system, and directly set the modulating mode of current channel according to described channel parameter, behind the semaphore lock, notify described channel manage system, output TS flows to described business information resolution system.
According to the digital television receiver based on the DTMB standard of the present invention, described channel parameter is the channel mode parameter.
According to the digital television receiver based on the DTMB standard of the present invention, in the channel manage system, comprise that further the channel mode parameter is provided with module, is used to be provided with the initial value of channel mode parameter.
According to the digital television receiver based on the DTMB standard of the present invention, in front end system, further comprise the carrier mode judge module, be used for carrying out carrier mode and judge according to described channel parameter; If described channel parameter is a single carrier mode, then described front end system enters single carrier mode, if multi-carrier mode, then described front end system enters multi-carrier mode.
The present invention searches for multi-carrier mode and then searches for single carrier mode with the single carrier mode search and then with multi-carrier mode search or elder generation earlier by receiving the channel that need search at front end system from the channel manage system; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium by described channel manage system; When channel switches, front end system receives the channel and the channel parameter of switching channels in the channel manage system, and directly set the modulating mode of current channel according to channel parameter, and enter this pattern and carry out channel and switch, improved under the common pattern that exists of two kinds of carrier modes the speed that channel switches.
Description of drawings
Fig. 1 is based on the channel searching method schematic diagram of DTMB standard in the prior art;
Fig. 2 is based on the channel switching method schematic diagram of DTMB standard in the prior art;
Fig. 3 is the automatic search platform management system module pie graph of a digital satellite broadcasting OTA of the utilization in the patent document;
Fig. 4 is the structural representation of the digital television receiver based on the DTMB standard provided by the invention;
Fig. 5 is the structural representation based on the digital television receiver of DTMB standard that provides in the one embodiment of the invention;
Fig. 6 is the channel searching method schematic diagram based on the DTMB standard provided by the invention;
Fig. 7 is the channel switching method schematic diagram based on the DTMB standard provided by the invention;
Fig. 8 is the channel searching method flow chart based on the DTMB standard in the one embodiment of the invention;
Fig. 9 is the channel switching method flow chart based on the DTMB standard in the one embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 4 is the structural representation of the digital television receiver based on the DTMB standard provided by the invention; Should be based on the digital television receiver 4 of DTMB standard, the digital television receiver that comprises front end system 41, channel manage system 42, storage medium 43 and business information resolution system 44, described front end system 41 receives the channel that needs search from described channel manage system 42, earlier with the single carrier mode search and then with the multi-carrier mode search or search for the multi-carrier mode search and then with single carrier mode earlier; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium 43 by described channel manage system 42, finishes the search of current channel then, enters next channel search; Described front end system 41 receives the channel and the described channel parameter of switching channels from described channel manage system 42, and directly set the modulating mode of current channel according to described channel parameter, behind the semaphore lock, notify described channel manage system 42, output TS flows to described business information resolution system 44.And described channel parameter is the channel mode parameter.In the present invention, can set in advance the carrier mode of a channel search, can be that single carrier mode also can be a multi-carrier mode.After having attempted wherein a kind of carrier mode, lock this pattern and carried out channel switching subsequent step, then this information is stored, treat that follow-up carrying out directly provides this carrier mode that the efficient that provides channel to switch is provided to carry out channel to the leading portion system when channel switches.
And in one embodiment of the invention, described channel parameter is the channel mode parameter.This channel mode parameter representative is single carrier mode or multi-carrier mode.
Fig. 5 is the structural representation based on the digital television receiver of DTMB standard that provides in the one embodiment of the invention, in this embodiment, in channel manage system 42, comprise that further the channel mode parameter is provided with module 421, is used to be provided with the initial value of channel mode parameter.The initial value of this channel mode parameter can be a unknown pattern, or single carrier mode, multi-carrier mode.Acquiescence is a unknown pattern in the one embodiment of the invention.
And, in front end system 41, further comprise carrier mode judge module 411, be used for carrying out carrier mode and judge according to described channel parameter; If described channel parameter is a single carrier mode, then described front end system enters single carrier mode, if multi-carrier mode, then described front end system enters multi-carrier mode.
Fig. 6 is the channel searching method flow chart based on the DTMB standard provided by the invention; Be described below:
Owing in broadcasting process,, both may be to adopt the single-carrier modulated mode, also may be to adopt multi-carrier modulation, but only may be a kind of debud mode wherein at current some channels.So when channel search, adopt the mode of single carrier and multicarrier sequential search, while setting contents of channel mode parameter, i.e. SubCarrier_Mode (channel mode parameter)=SingleCarrier_Mode/MultiCarrier_Mode (single carrier mode parameter or multi-carrier mode parameter).Therefore when the some channels of search, search single carrier (multicarrier) is searched for multicarrier (single carrier) pattern then earlier, in case during a certain mode locking, just note the parameter S ubCarrier_Mode of present mode to channel mode, and the SubCarrier_Mode currency is passed to channel manage system 42 preserve, finish the search of current channel then, enter next channel.
When any one channel search process finishes, all can have corresponding channel mode parameter S ubCarrier_Mode to go on record, and pass to 42 preservations of channel manage system, channel manage system 42 is stored in this parameter in the storage medium 43.
Fig. 6 is the channel searching method schematic diagram based on the DTMB standard provided by the invention, is described below: the invention provides a kind of channel searching method based on the DTMB standard; And this method is used to comprise the digital television receiver 4 of front end system 41, channel manage system 42, storage medium 43 and business information resolution system 44, and described method comprises:
The channel search step, described front end system 41 receives the channel that needs search from described channel manage system 42, earlier with the single carrier mode search and then with the multi-carrier mode search or search for the multi-carrier mode search and then with single carrier mode earlier; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium 43 by described channel manage system 42, finishes the search of current channel then, enters next channel search.
When users with channel switches, the channel manage system can pass to front end system 41 with this parameter of SubCarrier_Mode, front end system 41 can directly be set the modulating mode of current channel according to this parameter, thereby improves front end system 41 operating efficiencies and accelerating channel switch speed.SubCarrier_Mode (channel mode parameter)=SingleCarrier_Mode/MultiCarrier_Mode (single carrier mode parameter or multi-carrier mode parameter) wherein.
Fig. 7 is the channel switching method schematic diagram based on the DTMB standard provided by the invention, be described below: finished the channel search step for above-mentioned Fig. 6 among the present invention, the trivial carrier mode of having decided the channel switching, then carry out the channel switch step, described front end system 41 receives the channel and the described channel parameter of switching channels from described channel manage system 42, and directly set the modulating mode of current channel according to described channel parameter, behind the semaphore lock, notify described channel manage system 42, output TS flows to described business information resolution system 43.In one embodiment of the invention, described channel parameter is the channel mode parameter.
In another one embodiment of the present invention, in described channel search step, comprise that further the initial value of channel mode parameter is set step.As when the channel search, the initial value that module 421 is provided with the channel mode parameter is set by the channel mode parameter in channel manage system 42; Definition SubCarrier_Mode=Unknow_Mode is the parameter setting initial value, shows the unknown of current channel modulating mode.Channel search begins, search single carrier (multicarrier) is searched for multicarrier (single carrier) pattern then earlier, in case during a certain mode locking, just note present mode to channel mode parameter S ubCarrier_Mode, and the SubCarrier_Mode currency is passed to channel manage system 42 preserve, finish the search of current channel then, enter next channel.If two kinds of modulating modes all do not have locking, illustrate that this physical channel does not have signal.
Fig. 8 is the channel searching method flow chart based on the DTMB standard in the one embodiment of the invention; In this embodiment, only search for single carrier mode earlier with a certain physical channel, searching for multi-carrier mode again is example.
In step S801, the mode that front end system 401 is searched for automatically in the mode of single carrier obtains channel parameter.
In step S802, judge whether signal locks, be execution in step S803 then, otherwise execution in step S804.
In step S803, write down current channelling mode parameter, i.e. channel mode parameter: SubCarrier_Mode=SingleCarrier_Mode.
In step S804, the mode that front end system 402 is searched for automatically in the mode of multicarrier obtains channel parameter.
In step S805, judge whether signal locks, be execution in step S806 then, otherwise execution in step S807.
In step S806, write down current channelling mode parameter, i.e. channel mode parameter: SubCarrier_Mode=MultiCarrier_Mode.
In step S807, write down current channelling mode parameter, i.e. channel mode parameter: SubCarrier_Mode=Unknow_Mode.
In step S808, channel manage system 42 preserves the channel mode parameter.
In step S809, storage medium 43 is preserved the channel mode parameter.
When channel switched, channel manage system 42 can will pass to front end system 41 by the SubCarrier_Mode parameter of preserving after the channel search, and front end system 42 is directly set the modulating mode of current channel according to this parameter.
And in one embodiment of the invention, comprise further in the channel switch step that carrier mode judge module 411 carries out the carrier mode determining step according to described channel parameter, if single carrier mode, then described front end system enters single carrier mode, if multi-carrier mode, then described front end system enters multi-carrier mode.
Fig. 9 is the channel switching method flow chart based on the DTMB standard in the one embodiment of the invention; Be described below:
In step S901, the channel mode parameter that front end system 41 receiving channels systems 42 transmit.
In step S902, carrier mode judge module 411 carries out carrier mode according to described channel parameter and judges whether it is the single carrier mode parameter, is execution in step S903 then, otherwise execution in step S904;
In step S903, channel parameter manually is set, leading portion system 41 enters single carrier mode and carries out the channel switching.
In step S904, carrier mode judge module 411 carries out carrier mode according to described channel parameter and judges whether it is the multi-carrier mode parameter, is execution in step S905 then, otherwise process ends;
In step S905, channel parameter manually is set, leading portion system 41 enters multi-carrier mode and carries out the channel switching.
In other embodiment of the present invention, in the process that channel switches, also can be the judgement of carrying out the pattern of multicarrier earlier, if not the pattern of multicarrier enters the judgement of single carrier mode again, detailed process is similar to the above embodiments, does not repeat them here.
In sum, the present invention searches for multi-carrier mode and then searches for single carrier mode with the single carrier mode search and then with multi-carrier mode search or elder generation earlier by receiving the channel that need search at front end system from the channel manage system; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium by described channel manage system; When channel switches front end system again the channel manage system receive the channel and the channel parameter of switching channels, and directly set the modulating mode of current channel according to channel parameter, and enter this pattern and carry out channel and switch, improved under the common pattern that exists of two kinds of carrier modes the speed that channel switches.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1, a kind of channel searching method based on the DTMB standard is used to comprise it is characterized in that the digital television receiver of front end system, channel manage system, storage medium and business information resolution system, comprising:
The channel search step, described front end system receives the channel that needs search from described channel manage system, earlier with the single carrier mode search and then with the multi-carrier mode search or search for the multi-carrier mode search and then with single carrier mode earlier; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium by described channel manage system, finishes the search of current channel then, enters next channel search;
The channel switch step, described front end system receives the channel and the described channel parameter of switching channels from described channel manage system, and directly set the modulating mode of current channel according to described channel parameter, behind the semaphore lock, notify described channel manage system, output TS flows to described business information resolution system.
2, the channel searching method of DTMB standard according to claim 1 is characterized in that, described channel parameter is the channel mode parameter.
3, the channel searching method of DTMB standard according to claim 1 and 2 is characterized in that, in described channel search step, comprises that further the initial value of channel mode parameter is set step.
4, the channel searching method of DTMB standard according to claim 1 and 2, it is characterized in that, in the channel switch step, further comprise according to described channel parameter and carry out the carrier mode determining step, if single carrier mode, then described front end system enters single carrier mode, if multi-carrier mode, then described front end system enters multi-carrier mode.
5, a kind of digital television receiver based on the DTMB standard, the digital television receiver that comprises front end system, channel manage system, storage medium and business information resolution system, it is characterized in that, described front end system receives the channel that needs search from described channel manage system, earlier with the single carrier mode search and then with the multi-carrier mode search or search for the multi-carrier mode search and then with single carrier mode earlier; After a kind of mode locking wherein, the record present mode is to channel parameter, and described channel parameter currency is saved in described storage medium by described channel manage system, finishes the search of current channel then, enters next channel search; Described front end system receives the channel and the described channel parameter of switching channels from described channel manage system, and directly set the modulating mode of current channel according to described channel parameter, behind the semaphore lock, notify described channel manage system, output TS flows to described business information resolution system.
According to the described digital television receiver of claim 5, it is characterized in that 6, described channel parameter is the channel mode parameter based on the DTMB standard.
7, according to claim 5 or 6 described digital television receivers, it is characterized in that, in the channel manage system, comprise that further the channel mode parameter is provided with module, is used to be provided with the initial value of channel mode parameter based on the DTMB standard.
8, according to claim 5 or 6 described digital television receivers, it is characterized in that, in front end system, further comprise the carrier mode judge module, be used for carrying out carrier mode and judge according to described channel parameter based on the DTMB standard; If described channel parameter is a single carrier mode, then described front end system enters single carrier mode, if multi-carrier mode, then described front end system enters multi-carrier mode.
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| CN108111906A (en) * | 2017-12-26 | 2018-06-01 | 深圳Tcl数字技术有限公司 | Channel search method, device and computer readable storage medium |
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| CN108111906A (en) * | 2017-12-26 | 2018-06-01 | 深圳Tcl数字技术有限公司 | Channel search method, device and computer readable storage medium |
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