CN1833361A - Fast service scan for digital television receivers - Google Patents
Fast service scan for digital television receivers Download PDFInfo
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- CN1833361A CN1833361A CNA2004800225423A CN200480022542A CN1833361A CN 1833361 A CN1833361 A CN 1833361A CN A2004800225423 A CNA2004800225423 A CN A2004800225423A CN 200480022542 A CN200480022542 A CN 200480022542A CN 1833361 A CN1833361 A CN 1833361A
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Abstract
A fast service scan is provided for recovering programming services in a received digital data transmission, such as a digital television transmission. A receiver (100) stores frequency data (104) for different transmission standards, as well as a country or region setting (105) based on the location of the receiver. The frequency data may be provided, e.g., via a software download, flash card, or pre-programming. The service scan is initiated when a reset or installation of the receiver occurs. The frequency data for the identified transmission standard is identified, and used to control a tuner (102) at the receiver to tune only to the identified frequencies to recover the programming services, thereby reducing the scan time.
Description
The present invention relates generally to DITEC digital television communications, and more specifically, relates to the technology that is used for providing to the digital data receiver such as television receiver quick service scan.
DITEC digital television communications are owing to audio ﹠ video signal quality and the various characteristics that can the realize increased popularity that becomes.For example, a lot of places are achieved the standard that is defined by digital video broadcasting (DVB) alliance in the world.These standards especially comprise a series of transmission specifications, comprise DVB-S, satellite transmits standard, and DVB-C, cable are sent standard and DVB-T, land transmission standard.DVB-T be a kind of maturation and digital flexibly land transmission system, it is based on COFDM (coded orthogonal frequency division multiplexing) and QPSK, 16QAM and 64QAM modulation.DVB-T allows the service supplier to mate with sub-fraction power and even improvement simulation coverage.In addition, it has expanded the scope of digital land TV in the mobile field, such as expanding to portable handheld device.
Firm first the installation or replacement, described DTV receiver just attempts to discern the service in the transmission that is received.This operation can be undertaken by each possible frequency that sweep signal may exist.For example, it can comprise the channel 21-69 of UHF frequency spectrum.This is a kind of automatic search, is used to find all multiplexing and service in the whole frequency range.The user also may number by inputting channel and carry out manual search.Described receiver be tuned to the channel of appointment, and add existing service in all new services and the alternative service tabulation.Yet any method all is time-consuming.For example, for most of receiver, the scanning of four corner can spend up to 20 minutes.This may be very inconvenience for the user.
The present invention is by providing quick service scan to be devoted to solve above-mentioned and other problem to the digital data receiver such as television receiver.
According to special aspects of the present invention, a kind of method that is used for receiving digital data transmission comprises: storage is used to discern thereon the data according to the frequency of different transmission standard transmission of digital data; Discern a specific criteria of the different transmission standards that are associated with the digital data transfer that is received; And only scan the next positioning programming service in the digital data transfer that is received of frequency of discerning that is associated with a specific criteria of different transmission standards by the control tuner.
According to another aspect of the present invention, provide a kind of and be used to dispose receiver so that the method for receiving digital data transmission, wherein said receiver comprises tuner, described tuner can scan predetermined frequency sets, and comprises at least one memory.Described method comprises: store data at least one memory, so that the subclass that identification is gathered according to the preset frequency of at least one transmission standard transmission of digital data thereon; And control described tuner so that come positioning programming service in the digital data transfer that is received by the subclass that only scans the preset frequency set.
Corresponding program storage device and receiver also are provided.
In the accompanying drawings:
Fig. 1 illustrates the exemplary digital data sink that is used to provide quick service scan according to the present invention;
Fig. 2 illustrates exemplary frequency space according to the present invention; And
Fig. 3 illustrates the illustrative methods that is used to provide quick service scan according to the present invention.
In institute's drawings attached, appropriate section is quoted by identical reference marker.
In various digital data transmission standards, only mentioned the frequency of the fixed number that will be used to transmit.This frequency number is significantly less than the total number of frequencies of searching in the automatic search pattern of routine.The tabulation of such frequency be can in various standards, find,, area or country comprised thereafter succeeded by different compasses of competency.For example, the D-book standard is used for Britain and Australia, and the E-book standard is used for Europe, and the NorDig standard covers Norway, Sweden, Finland and Denmark.Except that these standards, some country has themselves standard, normally the expansion of their basic standard that uses.For example, the standard of being used by Australia is based on the expansion of D-book.
The present invention utilizes above-mentioned observation that a kind of mode that is used to carry out quick service scan is provided.Use fixing grid, described receiver can be than more promptly scanning four corner by carrying out continuous sweep.According to a kind of possible method, the combination that the present invention can be by specific based on country for standard of general, all possible combination of frequency to a frequency meter that is used for Europe is realized.For example, an European frequency meter can make up E-book, D-book and NorDig transmission standard.Can provide another table for Australian frequency.When carrying out service scan, only the frequency that scans in particular grid or the table is set based on the user in the receiver.According to the geographical position of receiver, the user can provide and be provided with so which kind of transmission standard the notice receiver is using, and scans so that enable the suitable frequency of receiver identification.Because the frequency that scanning is less is so can finish service scan in about 20 seconds.In addition, can be used for different geographical position to same receiver, wherein by only using different transmission standards for receiver is provided with country /region setting.This has reduced manufacturing, dispensing and the installation cost of receiver.
In addition, for the problem of the fact that overcomes the frequency shift (such as what occur) that in receiver, has fixing frequency meter and use sometimes, for example can for example upgrade described frequency meter as required via software download and/or flash card in Australia.In fact, usually these frequency ranges are very stable.
Process disclosed herein advantageously causes fast than usual ten to 20 times of frequency scanning.
Fig. 1 illustrates the exemplary digital data sink that is used to provide quick service scan according to the present invention.Piece 102 is " tuner and decoders ".Piece 103 is " control circuits ".Piece 113 is " memories ".Piece 104 is " frequency data " memories.Piece 105 is " country /region setting " memories.Piece 107 is " output circuits ".Piece 106 is " user interfaces ".Piece 110 is " displays ".
In a kind of possible method, the present invention realizes by using the parts in the TV set-top box receiver, for example, receiver 100, it comes received television signal via the input path 101 such as antenna, and via signal path output 108 output signals so that show on such as the display device 110 of TV.Yet the present invention can be applicable to the equipment of any kind of receiver, video and/or audio program usually.For example, the present invention can realize in computer, and this computer is for example by downloading, spread or broadcasting, such as Webcasting (webcasting) from network receiving video program such as the Internet.Though do not require, described video frequency program typically comprises track.In addition, the present invention can be used for simple audio program, such as via the Internet for example as broadcasting or provide via radio broadcasting those, described radio broadcasting comprises land and radio broadcast via satellite.The present invention can also be used to comprise the transmission of the data, services that does not require Voice ﹠ Video.
The program that receiver 100 is tuning at tuner/decoder 102 places, multichannel is separated and decoding receives.Described program can provide with numeral or analog multiplexer, and it for example transmits by cable, satellite or terrestrial broadcast.Usually, one of them program is based on user/viewer and carries out channel selection via hand-held remote controller and come decoded.User input signal from remote controller is handled by the user interface function in the receiver 100 106.Remote controller can use the communication path 109 of any kind, such as infrared, wired, ultrasonic wave, radio frequency or the like.When the user selected channel via user interface 106, described control circuit 103 for example recovered corresponding program such as the information of packet identifier (PID) from the transmission that receives by using.
The program of decoding can be passed to display device 110 via output circuit 107, perhaps stores so that follow-up demonstration on the spot.Control circuit 103 such as the microprocessor that has working storage 113 can be mutual with tuner/decoder 102, so that the function of control tuner/decoder 102.Working storage 113 can be considered to program storage device, is used to store the software of being carried out by control circuit 103, so that realize function described herein.Yet, can be by using any known technology to be provided for to store and handle instruction such as software so that realize the resource of desired function.
Control circuit 103 is the storing frequencies data in frequency data memory 104.Described frequency data for example can have the form of form, and obtain via software download and/or flash card.If desired, frequency data equally also can be updated.Frequency data can comprise the data of being used by control circuit 103 in control tuner/decoder 102, so that be tuned to the assigned frequency that is associated with transmission standard.Described data for example can comprise center frequency value.Can also comprise other tuner parameters, such as FFT pattern and protection interval.In addition, frequency data can the given transmission bandwidth, and this is the important parameter after the frequency self.According to a kind of possible implementation, frequency data include only the combination of frequency and bandwidth.
Scanning process can be regulated by changing these parameters.Frequency data can be organized, so as with different transmission standards, for example country variant or regional associated frequency can be identified and retrieve.
Can country and/or the area setting that for example compass of competency is provided be stored in the memory 105, so that in its decision process, use by control circuit 103.Described area for example can be one group of country, or the part of a country.Memory 104 and 105 is shown as independently, but they can make up with other memory resource.Described country and/or area are provided with can be provided via user interface 106 or via the hardware switch such as dual inline type electrode (DIP) switch or the like by the user.Described country and/or area are provided with and can be associated with one or more transmission standards.Control circuit 103 can be discerned the frequency of the particular transmission standard in the frequency data memory 104 based on the country /region setting in the memory 105.When only being stored in the frequency of a transmission standard in the memory 104, do not need country /region setting independently to distinguish not on the same group frequency.
Fig. 2 illustrates exemplary frequency space according to the present invention.Described frequency space is a kind of Venn Diagram (Venn Diagram), and being used to show can be by the tuning frequency of receiver 100.Described frequency space 200 shows the four corner that receiver can tuned frequency, for example Yu Ding frequency sets.For example, Sweden continues to use NorDig II standard.In this case, described receiver can receive all channels in UHF frequency band IV and the V (channel 21-69).Specifically, described tuner can be tuned to the centre frequency f of input DVB-T RF signal
c, f wherein
c=474 megahertzes+(N-21) * 8 megahertzes+f
Fine, N ∈ 21 ..., 69}, and f
Fine∈ 1-10 KHz, 10 KHz].N is a channel number, and f
FineIt is continuous fine frequency offset scope.Described frequency space 210,220 and 230 shows respectively and first, second and the 3rd transmission standard associated frequency.Only as an example, some that shows between the frequency of frequency space 210,220 and 230 is overlapping, the situation but this is not inevitable.Described frequency space 210,220 and 230 is each subclass of frequency space 200.
Fig. 3 illustrates the illustrative methods that is used to provide quick service scan according to the present invention.Piece 300 explanations " transmission frequency of identification various criterion ".Piece 305 explanations " storing frequencies in receiver ".Piece 310 is inquired " resetting or installation? "Piece 315 explanations " standard that identification is associated with the transmission that receives ".Piece 320 explanation " for the frequency of the standard retrieval storage discerned ".Piece 325 explanation " frequency that only scans criterion of identification is so that positioning service in the transmission that is received ".
At piece 300, discern the transmission frequency of one or more transmission standards.These frequencies can obtain from the normative document compilation, and described normative document compilation can obtain publicly.At piece 305, for example, described frequency is stored in the receiver 100, in frequency data memory 104 via software download, flash card or programming in advance during fabrication.At piece 310, determine the replacement of receiver or install whether take place.In these situations, need service scan to recover and discern the programming service of reception.If show service scan, so at piece 315, for example the data that are provided with in the memory 105 based on country /region are discerned the standard that is associated with the transmission that receives.At piece 320, the storing frequencies of the transmission standard that identifies is resumed from frequency data memory 104, and is used to control tuner/decoder 102 and is tuned to assigned frequency, so that recover the data, services of the transmission that receives.Specifically, at piece 325,102 of described tuner/decoder scan the frequency of criterion of identification.Thereby described tuner/decoder 102 can be according to for example being tuned to described frequency from minimum to the highest order.
Though illustrated and described the preferred embodiments of the present invention, it should be understood that certainly under the situation that does not break away from spirit of the present invention, be easy to make in form or the various modifications and variations on the details.Therefore, the present invention is not intended to and is restricted to described and illustrational precise forms, but should be interpreted as covering all modifications of the scope that falls into appended claims.
Claims (20)
1. one kind is used for the method that receiving digital data transmits, and described method comprises:
Storage (305) is used to discern thereon the data according to the frequency (210,220,230) of different transmission standard transmission of digital data;
A specific criteria of the different transmission standards that identification (315) and the digital data transfer that is received are associated; And
Only scan (325) by the control tuner and come positioning programming service in the digital data transfer that is received with the frequency of discerning that the specific criteria of described different transmission standards is associated.
2. the method for claim 1, wherein: the described different transmission standard compasses of competency different with each is associated.
3. the method for claim 1, wherein: the described different transmission standard countries different with each is associated.
4. the method for claim 1, wherein: the specific criteria of discerning described different transmission standards comprises that receiving the user via user interface (106) is provided with.
5. the method for claim 1, wherein: the digital data transfer that is received provides according to digital video-frequency broadcast standard.
6. the method for claim 1, wherein: the digital data transfer that is received comprises at least one of audio ﹠ video data.
7. the method for claim 1, wherein: the digital data transfer that is received comprises data, services.
8. the method for claim 1, wherein: the digital data transfer that is received is to provide at least one of corresponding broadcasting, multileaving and streamed content.
9. the method for claim 1 also comprises:
Storage is used to discern the data with the bandwidth that joins according to the frequency dependence of different transmission standard transmission of digital data thereon;
The location of wherein said programming service is in response to the data of the described bandwidth of identification.
10. program storage device is used for the program of the instruction that certain realization can be carried out by machine, so that carry out the method that is used for the receiving digital data transmission, described method comprises:
Storage (305) is used to discern thereon the data according to the frequency (210,220,230) of different transmission standard transmission of digital data;
A specific criteria of the different transmission standards that identification (315) and the digital data transfer that is received are associated; And
Only scan (325) by the control tuner and come positioning programming service in the digital data transfer that is received with the frequency of discerning that the specific criteria of described different transmission standards is associated.
11. a receiver that is used for the receiving digital data transmission, described receiver comprises:
At least one memory (104,105), be used to store the frequency (210 that is used for discerning thereon according to different transmission standard transmission of digital data, 220,230) data, and the data that are used to store a specific criteria that is used for discerning the different transmission standards that are associated with the digital data transfer that is received;
The controller (103) that is associated with described at least one memory; And
Tuner (102) is used for the next digital data transfer positioning programming service that is being received in response to this controller of frequency of discerning that is associated with the specific criteria of described different transmission standards by only scanning.
12. a receiver that is used for the receiving digital data transmission, described receiver comprises:
Tuner (102), it can scan predetermined frequency sets (200);
At least one memory (104) is used to store the data of the subclass (210,220,230) of identification preset frequency set, wherein on described preset frequency according at least one transmission standard transmission of digital data; And
Controller (103) is associated with described at least one memory, is used for controlling described tuner (102) and comes by only scanning the digital data transfer positioning programming service of subclass to receive of preset frequency set.
13. receiver as claimed in claim 12, wherein:
Described at least one memory (104,105) storage is used to discern thereon the data according to the frequency of a plurality of transmission standard transmission of digital data.
14. receiver as claimed in claim 12, wherein:
Described a plurality of transmission standard comprises E-book, D-book and NorDig.
15. receiver as claimed in claim 12, wherein:
Described controller (103) and described at least one memory (104,105) be associated, be used for controlling described tuner (102) and come to discern frequency with in the digital data transfer positioning programming service that is received by what only scan selected one of them transmission standard, this selected one of them transmission standard is associated with the digital data transfer that is received.
16. one kind is used to dispose the method that receiver comes the receiving digital data transmission, wherein said receiver comprises tuner, and described tuner can scan predetermined frequency sets and comprise at least one memory, and described method comprises:
Storage is used to discern the data of the subclass (210,220,230) of preset frequency set (200) in described at least one memory (104,105), wherein on described preset frequency according at least one transmission standard transmission of digital data; And
Control described tuner (102) so that come positioning programming service in the digital data transfer that is received by the subclass that only scans described preset frequency set.
17. method as claimed in claim 16, wherein:
The storage data are included in storage in described at least one memory and are used to discern thereon data according to the frequency of a plurality of transmission standard transmission of digital data in described at least one memory (104,105).
18. method as claimed in claim 17, wherein:
Described a plurality of transmission standard comprises E-book, D-book and NorDig.
19. method as claimed in claim 16, wherein:
Control that described tuner (102) comprises the described tuner of control so that come positioning programming service in the digital data transfer that is received by the frequency of discerning that only scans selected one of them transmission standard, this selected one of them transmission standard is associated with the digital data transfer that is received.
20. method as claimed in claim 16, wherein:
In described at least one memory (104,105) the storage data be included in storage in described at least one memory be used to discern with thereon according to the data of the bandwidth of the frequency dependence connection of at least one transmission standard transmission of digital data;
Wherein controlling described tuner (102) comes the positioning programming service to be in response to the data of the described bandwidth of identification.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49327303P | 2003-08-07 | 2003-08-07 | |
| US60/493,273 | 2003-08-07 | ||
| US60/529,598 | 2003-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1833361A true CN1833361A (en) | 2006-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800225423A Pending CN1833361A (en) | 2003-08-07 | 2004-08-04 | Fast service scan for digital television receivers |
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| CN (1) | CN1833361A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104041060A (en) * | 2012-01-08 | 2014-09-10 | 汤姆逊许可公司 | Apparatus and method for content directory server presentation |
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- 2004-08-04 CN CNA2004800225423A patent/CN1833361A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104041060A (en) * | 2012-01-08 | 2014-09-10 | 汤姆逊许可公司 | Apparatus and method for content directory server presentation |
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| CI02 | Correction of invention patent application |
Correction item: Priority Correct: 2003.12.15 US 60/529,598 False: Lack of priority second Number: 37 Page: The title page Volume: 22 |
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Free format text: CORRECT: PRIORITY; FROM: MISSING THE SECOND ARTICLE OF PRIORITY TO: 2003.12.15 US 60/529,598 |
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