CN102045521B - Digital television channel searching method and digital television employing same - Google Patents
Digital television channel searching method and digital television employing same Download PDFInfo
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- CN102045521B CN102045521B CN 200910110664 CN200910110664A CN102045521B CN 102045521 B CN102045521 B CN 102045521B CN 200910110664 CN200910110664 CN 200910110664 CN 200910110664 A CN200910110664 A CN 200910110664A CN 102045521 B CN102045521 B CN 102045521B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 12
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Abstract
The invention provides a digital television channel searching method and a digital television employing same, which are suitable for the technical field of digital televisions, wherein the method comprises the following steps of: a) seeking a frequency point which carries an NIT (Network Information Table) and corresponds to a zone selected by a user; and b) searching the frequency point, receiving the television signal of the frequency point, and acquiring the NIT from the received television signal. The technical scheme provided by the invention ensures that the frequency point carrying the NIT can be directly searched when digital television channel searching is carried, can realize rapid channel searching and is easy to operate and convenient to use, a user is unnecessary to input frequency point data.
Description
Technical field
The invention belongs to the digital television techniques field, relate in particular to a kind of method of Digital Television tuning and adopt the digital television of the method.
Background technology
At present, the station search mode of Digital Television has two kinds: a kind of is full range point search (from low frequency to the high-frequency sequential search), and its shortcoming is the tuning overlong time; The second is only to search for NIT(Network Information Table network information table).The mode of only searching for NIT can be subdivided into again two kinds of forms: a kind of is first sequential search frequency, when the frequency that searches with NIT, catches NIT; Another kind is by a menu page, allows the user input to need the information (as: frequency, symbol rate, modulation system) with the frequency of NIT of search, and television set is according to the information of user's input, the frequency of removal search user appointment.The mode of search NIT, saved the time, but the mode of present search NIT still has drawback: the first sequential search frequency of first kind of way, until when searching frequency with NIT, catch the information of NIT, it still needs also to need by the frequency search time of growing, as the frequency that contains NIT is 462MHz, and that also will search 462MHz from 114MHz; Input the method for frequency point information by the user, need the user that TV signal is had more deeply and understand, know the TS stream of specifically which center frequency point transmission with NIT, and understand transmission property symbol rate and the modulation system of this frequency.If after user's input error, can search for failure, and input step is loaded down with trivial details.
Summary of the invention
The object of the present invention is to provide the digital television of method and employing the method for a kind of Digital Television tuning, be intended to solve the problem of digital television tuning.
The present invention is achieved in that a kind of method of Digital Television tuning, and described method comprises:
The MCU of a, digital television searches the frequency that carries NIT corresponding to zone that the user chooses from the memory of digital television, the frequency of searching is transferred to the tuning and demultiplexing unit of digital television;
The described frequency of tuning and demultiplexing unit search of b, described digital television, receive the TV signal of described frequency, obtain NIT from the TV signal that receives, be specially the decoding unit output TS stream of the TV signal that receives being processed backward digital television; The decoding unit of described digital television is decoded to described TS stream, therefrom obtains SI, the SI that obtains is transferred to the MCU of described digital television; The MCU of described digital television resolves the SI of described decoding unit transmission, therefrom obtains NIT.
Wherein also comprise before step a:
A0, in the memory of digital television storage area title/zone number and the frequency that carries NIT corresponding to described zone name/zone number, set up described zone name/zone number and carry corresponding relation between the frequency of NIT.
Wherein also comprise after a0 before step a:
the MCU of described digital television is according to the instruction of the startup program search of user's input, call regional choice menus data, and the regional choice menus transfer of data of just calling is to the display processing unit of digital television, the display processing unit of described digital television carries out Graphics Processing to described regional choice menus data, the display unit of digital television shows described regional choice menus, the control signal receiving element of digital television receives the user and choose the control command in a certain zone from described regional choice menus, described control command is transferred to the MCU of described digital television.
Wherein MCU described in step b resolves the SI of described decoding unit transmission, therefrom obtains NIT and specifically comprises:
Whether carry NIT in the TV signal that the MCU judgement of b1, described digital television receives, if so, the MCU of described digital television resolves described NIT, otherwise turns step b2;
The MCU of b2, described digital television controls the tuning and demultiplexing unit of described digital television and searches for all frequencies, until search the frequency that carries NIT, the MCU of described digital television obtains NIT and it is resolved.
The present invention also provides a kind of digital television, and described digital television comprises control signal receiving element, MCU, tuning and demultiplexing unit, decoding unit and memory, wherein:
Described control signal receiving element is used for receiving the control command that the user chooses a certain zone, and described control command is transferred to described MCU;
Described MCU is used for searching the frequency that carries NIT corresponding to described user's selected areas from described memory, the frequency of searching is transferred to described tuning and demultiplexing unit; Described MCU also is used for the SI of described decoding unit transmission is resolved, and therefrom obtains NIT;
Described tuning and demultiplexing unit are used for searching for described frequency, receive the TV signal of described frequency, and the TV signal that receives is processed backward described decoding unit output TS stream;
Described decoding unit is used for described TS stream is decoded, and therefrom obtains SI, and the SI that obtains is transferred to described MCU;
Described memory is used for storing the frequency that carries NIT corresponding to described user's selected areas.
More specifically, described television set also comprises display processing unit and display unit, described memory also is used for storage area choice menus data, described MCU is used for calling described regional choice menus data from described memory, the regional choice menus transfer of data of calling is arrived described display processing unit, described display processing unit is used for described regional choice menus data are carried out Graphics Processing, and described display unit is used for showing described regional choice menus.
More specifically, described regional choice menus comprises the zone that two or more are selected for the user, described control signal receiving element is used for receiving the control command of choosing a certain zone from described regional choice menus, and described control command is transferred to described MCU.
More specifically, described two or more be two or more zone names or zone number for zones that users select, select zone name or the zone number corresponding with described digital television region for the user.
More specifically, described MCU also is used for when the frequency that carries NIT corresponding to described user's selected areas do not carry NIT, controls described tuning and demultiplexing unit and searches for all frequencies, until search the frequency that carries NIT.
The present invention overcomes the deficiencies in the prior art, zones of different is carried the frequency of NIT and pre-stored in digital television with the corresponding relation in zone, during user's tuning, select the zone at digital television place, the frequency of NIT and the corresponding relation in zone carry in system according to the zones of different of storage, find the frequency that carries NIT corresponding to user-selected zone, then directly search this frequency, obtain NIT.When technical scheme provided by the invention makes the Digital Television tuning, can directly search the frequency that carries NTI, can realize quick channel search, and not need the user to input frequency point data, simple to operate, easy to use.
Description of drawings
Fig. 1 is the theory diagram of the digital television of the embodiment of the present invention;
Fig. 2 is the regional choice menus schematic diagram of the embodiment of the present invention;
Fig. 3 is embodiment of the present invention flow chart.
Embodiment
Technical scheme provided by the invention is: zones of different is carried the frequency of NIT and pre-stored in digital television with the corresponding relation in zone, during user's tuning, select the zone at digital television place, the frequency of NIT and the corresponding relation in zone carry in system according to the zones of different of storage, find the frequency that carries NIT corresponding to user-selected zone, then directly search this frequency, obtain NIT.
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
the frequency of TV programme (TV station) all can pass through newspaper at present, the media such as the Internet are announced out, perhaps the television set manufacturer carries out field test to the locality, can understand accordingly frequency corresponding to each TV station, and this frequency information of carrying, can know that accordingly regional carries the frequency of NIT, then with the zone number (perhaps zone name) of regional, carry the frequency point data of NIT and store in the digital television memory with the corresponding relation of regional, as shown in the table, the numbering (title) that comprises regional, regional carries frequency point parameters and the corresponding memory address of NIT.
| Memory address | Zone number (title) | Carry the frequency of NIT |
| 0xFF00 | EEP_AREA_0 | 299MHz |
| 0xFF02 | EEP_AREA_1 | ***MHz |
| 0xFF04 | EEP_AREA_2 | ***MHz |
| 0xFF06 | EEP_AREA_3 | ***MHz |
| ?0xFF08 | EEP_AREA_4 | ***MHz |
| ?0xFF0A | EEP_AREA_5 | ***MHz |
| ?----------- | ------ | ------ |
When the user needs tuning, after digital television starts program search, at first a regional choice menus will be provided, this menu comprises zone name or the zone number of regional, the user chooses the zone at Contemporary Digital TV place from regional choice menus, the frequency that carries NIT corresponding to this selected areas will be searched by system from memory, directly search this frequency, receive digital television signal corresponding to this frequency, obtain NIT from the digital television signal that receives, then NIT is resolved, complete the tuning process.
During concrete application technical scheme provided by the invention, regional choice menus can adopt regional choice menus as shown in Figure 2, comprises the zone name option, as " Beijing area ", " District of Shanghai ", " Shenzhen area " ... etc..When the user starts the digital television program search, MCU will call this menu data and send the Graphics Processing module from memory, this menu will show screen display, the user can move up and down cursor by digital TV set remote-controller or panel button, choose current region, region as current in television set is Shanghai, and the user to " District of Shanghai ", then confirms cursor movement.MCU will search the frequency that carries NIT corresponding to " District of Shanghai ", be transferred to tuning the frequency point data that finds and demultiplexing module.
The digital television theory diagram of the embodiment of the present invention comprises tuning and demultiplexing unit, control signal receiving element, decoding unit, microprocessor (MCU), memory, display processing unit and display unit as shown in Figure 1.Wherein:
Described control signal receiving element is connected with MCU, is used for receiving the control command of user's input, and the control command that receives is transferred to MCU, comprises the control command that starts program search, control command of selecting the region from regional choice menus etc.;
MCU is connected with decoding unit with memory, is used for controlling the operation of whole system, comprising: call data corresponding to regional choice menus according to the control command that starts program search from memory and send display processing unit to process; Choose the control command of region according to the user from regional choice menus, obtain the frequency point data of carrying NIT corresponding to user's selected areas from memory, be transferred to tuning the frequency point data of carrying NIT of obtaining and demultiplexing unit; Control tuning and demultiplexing unit and search for the frequency that this carries NIT; Control decoding unit and receive TS(Transport Stream transport stream tuning and the demultiplexing unit transmission) and it is resolved; The SI(Service Information information on services of receipt decoding unit transmission), obtain NIT etc. from SI;
Tuningly be connected with decoding unit with MCU with demultiplexing unit, be used for the frequency point data of carrying NIT according to the MCU transmission, search for TV signal corresponding to this frequency, TV signal is carried out the demodulation demultiplexing process backward decoding unit output TS stream;
Decoding unit is connected with MCU, is used for tuning TS stream with the demultiplexing unit transmission is resolved, and parses SI from TS stream, and the SI that parses is transferred to MCU;
Display processing unit is connected with MCU, be used for regional choice menus data are carried out Graphics Processing, and the regional choice menus after processing send display unit;
Display unit is connected with display processing unit, is used for the viewing area choice menus;
Memory be used for the zone number (perhaps zone name) of storage area choice menus data, regional, frequency that regional carries NIT and with the corresponding relation of zone number (perhaps zone name).
the zone number of pre-stored regional in digital television (perhaps zone name), regional carry NIT frequency and with the corresponding relation of zone number (perhaps zone name) after, the frequency that might some zone carries NIT changes, and the content in memory is not upgraded, when the user starts program search, tuning and demultiplexing module are according to the frequency tuning of storage, but there is no corresponding NIT in the SI of TS stream, this moment, MCU carried out full range point tuning with control system, obtain NIT, the frequency point data that to carry simultaneously NIT is written in memory, original frequency point data of carrying NIT is covered, thereby realize the renewal of data in memory.
See also Fig. 3, be embodiment of the present invention flow chart, specifically comprise following step:
1, start program search, the frequency point data of carrying NIT that user's selected areas is corresponding is input to tuning and demultiplexing unit;
2, tuningly search for TV signal corresponding to this frequency with demultiplexing unit, to TV signal carry out the demodulation demultiplexing process after output TS stream;
3, TS stream is resolved;
Does 4, this frequency carry NIT? if so, resolve NIT, tuning finishes, otherwise turns step 5;
5, increase progressively tuning from the low frequency order to high frequency by step-length;
6, do you judge that current frequency is with NIT? if so, turn step 7, otherwise turn step 8.
7, with this frequency write memory, cover original frequency point data of carrying NIT, resolve NIT, finish tuning.
8, do you judge that current frequency is high frequency points? if so, finish tuning, otherwise turn step 5;
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the method for a Digital Television tuning, described method comprises:
The MCU of a, digital television searches the frequency that carries NIT corresponding to zone that the user chooses from the memory of digital television, the frequency of searching is transferred to the tuning and demultiplexing unit of digital television;
The described frequency of tuning and demultiplexing unit search of b, described digital television, receive the TV signal of described frequency, obtain NIT from the TV signal that receives, be specially the decoding unit output TS stream of the TV signal that receives being processed backward digital television; The decoding unit of described digital television is decoded to described TS stream, therefrom obtains SI, the SI that obtains is transferred to the MCU of described digital television; The MCU of described digital television resolves the SI of described decoding unit transmission, therefrom obtains NIT.
2. method according to claim 1, is characterized in that, wherein also comprises before step a:
A0, in the memory of digital television storage area title/zone number and the frequency that carries NIT corresponding to described zone name/zone number, set up described zone name/zone number and carry corresponding relation between the frequency of NIT.
3. method according to claim 2, is characterized in that, wherein also comprises after a0 before step a:
the MCU of described digital television is according to the instruction of the startup program search of user's input, call regional choice menus data, and the regional choice menus transfer of data of just calling is to the display processing unit of digital television, the display processing unit of described digital television carries out Graphics Processing to described regional choice menus data, the display unit of digital television shows described regional choice menus, the control signal receiving element of digital television receives the user and choose the control command in a certain zone from described regional choice menus, described control command is transferred to the MCU of described digital television.
4. method according to claim 1, is characterized in that, wherein MCU described in step b resolves the SI of described decoding unit transmission, therefrom obtains NIT and specifically comprises:
Whether carry NIT in the TV signal that the MCU judgement of b1, described digital television receives, if so, the MCU of described digital television resolves described NIT, otherwise turns step b2;
The MCU of b2, described digital television controls the tuning and demultiplexing unit of described digital television and searches for all frequencies, until search the frequency that carries NIT, the MCU of described digital television obtains NIT and it is resolved.
5. a digital television, is characterized in that, described digital television comprises control signal receiving element, MCU, tuning and demultiplexing unit, decoding unit and memory, wherein:
Described control signal receiving element is used for receiving the control command that the user chooses a certain zone, and described control command is transferred to described MCU;
Described MCU is used for searching the frequency that carries NIT corresponding to described user's selected areas from described memory, the frequency of searching is transferred to described tuning and demultiplexing unit; Described MCU also is used for the SI of described decoding unit transmission is resolved, and therefrom obtains NIT;
Described tuning and demultiplexing unit are used for searching for described frequency, receive the TV signal of described frequency, and the TV signal that receives is processed backward described decoding unit output TS stream;
Described decoding unit is used for described TS stream is decoded, and therefrom obtains SI, and the SI that obtains is transferred to described MCU;
Described memory is used for storing the frequency that carries NIT corresponding to described user's selected areas.
6. digital television according to claim 5, it is characterized in that, described television set also comprises display processing unit and display unit, described memory also is used for storage area choice menus data, described MCU is used for calling described regional choice menus data from described memory, the regional choice menus transfer of data of calling is arrived described display processing unit, described display processing unit is used for described regional choice menus data are carried out Graphics Processing, and described display unit is used for showing described regional choice menus.
7. digital television according to claim 6, it is characterized in that, described regional choice menus comprises the zone that two or more are selected for the user, described control signal receiving element is used for receiving the control command of choosing a certain zone from described regional choice menus, and described control command is transferred to described MCU.
8. digital television according to claim 7, it is characterized in that, described two or more be two or more zone names or zone number for zones that users select, select zone name or the zone number corresponding with described digital television region for the user.
9. digital television according to claim 5, it is characterized in that, described MCU also is used for when the frequency that carries NIT corresponding to described user's selected areas do not carry NIT, controls described tuning and demultiplexing unit and searches for all frequencies, until search the frequency that carries NIT.
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| CN 200910110664 CN102045521B (en) | 2009-10-16 | 2009-10-16 | Digital television channel searching method and digital television employing same |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413366A (en) * | 2011-12-02 | 2012-04-11 | 深圳Tcl新技术有限公司 | Method and device for searching channels in digital television |
| CN104219564B (en) * | 2014-08-26 | 2019-06-14 | 深圳创维数字技术有限公司 | A kind of data managing method and set-top box of set-top box |
| CN105812689B (en) * | 2014-12-29 | 2019-06-21 | 深圳Tcl数字技术有限公司 | The method and apparatus of satellite television tuning |
| CN105721930A (en) * | 2016-02-04 | 2016-06-29 | Tcl海外电子（惠州）有限公司 | Channel searching method and system based on digital signal |
| CN106303683B (en) * | 2016-08-12 | 2019-06-11 | 广州视源电子科技股份有限公司 | Television channel update method and system |
| CN108882012A (en) * | 2018-06-28 | 2018-11-23 | 广州视源电子科技股份有限公司 | Program searching method, system, equipment and television set |
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| CN101594526A (en) * | 2008-05-30 | 2009-12-02 | 乐金电子(中国)研究开发中心有限公司 | In a kind of digital television to the lookup method and the digital television of network information table |
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| KR20030048971A (en) * | 2001-12-13 | 2003-06-25 | 주식회사 엘지이아이 | Channel search method |
| CN1625240A (en) * | 2003-12-03 | 2005-06-08 | 北京中视联数字***有限公司 | Method of quick searching program by receiving terminal of digital TV system |
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| CN101291406A (en) * | 2008-05-31 | 2008-10-22 | 青岛海信电器股份有限公司 | Channel searching method and television channel searching device |
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Application publication date: 20110504 Assignee: TCL OVERSEAS ELECTRONICS (HUIZHOU) Co.,Ltd. Assignor: SHENZHEN TCL NEW TECHNOLOGY Co.,Ltd. Contract record no.: 2013440020439 Denomination of invention: Digital television channel searching method and digital television employing same Granted publication date: 20130508 License type: Exclusive License Record date: 20131230 |
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