CN1327626C - Automatic channel selecting device - Google Patents
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- CN1327626C CN1327626C CNB2004100334884A CN200410033488A CN1327626C CN 1327626 C CN1327626 C CN 1327626C CN B2004100334884 A CNB2004100334884 A CN B2004100334884A CN 200410033488 A CN200410033488 A CN 200410033488A CN 1327626 C CN1327626 C CN 1327626C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0058—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means
- H03J1/0066—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means with means for analysing the received signal strength
- H03J1/0075—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means with means for analysing the received signal strength where the receiving frequencies of the stations are stored in a permanent memory, e.g. ROM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/4508—Management of client data or end-user data
- H04N21/4524—Management of client data or end-user data involving the geographical location of the client
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
- H03J2200/12—Radio receiver combined with a GPS receiver
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
- H03J2200/13—Television receiver combined with a GPS receiver
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/18—Automatic scanning over a band of frequencies
- H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Databases & Information Systems (AREA)
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
To efficiently auto-preset a broadcasting station capable of normal outputting by excluding a broadcasting station incapable of normal outputting in a broadcast receiving apparatus. Preset is invalidated not to store frequency information of a broadcasting station incapable of normal outputting in broadcasting stations receivable for the broadcast receiving apparatus. Preset is invalidated by disabling tuning of the broadcasting station incapable of normal outputting or by deleting the frequency information after presetting, and preset is performed only for the broadcasting station capable of normal outputting. Thus, efficient auto-preset is made possible. (C)2005,JPO&NCIPI.
Description
Technical field
The present invention relates to a kind of automatic channel choice device that is used for the apparatus for receiving broadcasting of mobile unit, relate in particular to the automatic channel choice device of the broadcasting station that a kind of automatic selection can normally export.
Technical background
Recently, along with development, make and obtain complicated and high function multimedia broadcasting becomes possibility by digital broadcast apparatus such as the digital technology of internet and computer etc.In digital broadcasting, by being carried on the carrier wave compressed signal of coded datas such as transmitted image and sound.Since can correcting data error in digital broadcasting, so mobile unit can receive broadcasting.In existing analog television broadcast, form single channel every the frequency that is used to broadcast that 6MHz divides, and each channel allocation is given the single broadcast platform.On the other hand, in digital broadcasting, by means of OFDM modulation technique (hereinafter being abbreviated as " OFDM "), can realize that multipath noise is eliminated, a plurality of channels (multichannel) of 6 MHz frequencies are broadcasted and high definition television broadcasting, thereby used frequency range effectively.
Because data transfer device and OFDM's is different, so the broadcast wave of digital broadcasting is different from the broadcast wave of analog broadcasting.Shown in Figure 1A, be example with the analog broadcasting ripple 1 of TV, this broadcast wave comprises image carrier 11, color subcarrier 12 and sound carrier 13 load every type information on each carrier wave.On the other hand, shown in Figure 1B, for digital broadcasting wave, information is carried on many carrier waves.When the ground digital broadcasting begins, do not have occupied frequency for the frequency that is used for broadcasting, so that the frequency hybrid analog-digital simulation broadcasting and the digital broadcasting that are being used for broadcasting the Frequency Distribution of channel or digital radio stations.
When broadcast area changes or barrier when interrupting broadcast wave owing to moving, the case of conventional analog broadcast receiving equipment that is used for mobile unit has the channel of automatic record the received broadcasting station relevant with each switching manipulation (hereinafter referred to as " initialize switch ") or the function (hereinafter referred to as " presetting automatically ") of frequency.Usually, preset automatically and empty channel or frequency, and reprocessing (hereinafter referred to as " presetting ") automatically, in this presets, when detecting the broadcasting station, write down the frequency information of the broadcasting station relevant with initialize switch at every turn.In each channel or frequency, whether the broadcasting station exists or do not exist by the incoming level that for example is included in the sound carrier 13 in the analog broadcasting ripple 1 (Figure 1A) judges above predetermined threshold.According to this kind judgement, there is multiple situation, in these situations, when receiving digital broadcasting wave 2 (Figure 1B), judge to have the broadcasting station.Therefore, ignore analog-and digital-ly in presetting automatically, the analog broadcasting receiving equipment presets automatically and can receive the broadcasting station.
, because broadcast wave and data transfer device is different, even receive digital broadcasting, the analog broadcasting receiving equipment can not normally be exported digital broadcasting.Referring to Fig. 2, automatically be predisposed to example in a zone in (for example, point 43) with the simulation receiving equipment, wherein, overlap each other in zone of the analog broadcasting around the analog broadcasting platform 31 32 and the digital broadcasting zone 42 around digital broadcasting zone 41.When there was digital radio stations 41 in judgement, even the analog broadcasting receiving equipment can not normally be exported digital broadcasting, the analog broadcasting receiving equipment also can carry out mistake to it and preset (hereinafter referred to as " mistake presets ").Because mistake presets and the digital radio stations that can not normally export is carried out pre-postpone, a kind of possibility will occur, has promptly limited the number of the analog broadcasting platform group that can normally export in presetting automatically.
By the way, have automatic presetter device, it does not select undesired broadcasting station (for example, referring to the paragraph [0018] in the early stage disclosed publication number Japan Patent that is Hei6-303108 (1994) and Fig. 1) from receiving automatically the broadcasting station.
According to the automatic presetter device of above-mentioned patent file, do not preset it outside the broadcasting station that can normally export automatically and be provided with the traffic information broadcasting platform of special switch and do not need terrestrial broadcasting platform of initialize operation etc.Therefore, getting rid of traffic information broadcasting platform and terrestrial broadcasting platform is possible outside presetting automatically, but presets other receivable broadcasting station automatically.In this case, for example, the problem that mistake presets promptly presets the problem that the analog broadcasting receiving equipment presets digital radio stations by mistake and still can not solve.
Summary of the invention
Consider the problems referred to above, an object of the present invention is provides the automatic channel choice device to apparatus for receiving broadcasting, and this automatic channel choice device presets the broadcasting station that can normally export automatically by getting rid of the broadcasting station that can not normally export with effective and efficient manner.
According to the present invention, to achieve these goals, the frequency reception information that receives according to receiving equipment detects the automatic channel choice device of receivable broadcasting station, writes down the frequency information of the broadcasting station of detection automatically by presetter device, and has following characteristic.
According to a first aspect of the invention, in the frequency information of the broadcasting station of being detected by receiving system, invalidation means makes presetter device frequency information record, that be judged as the broadcasting station that can not normally export invalid.Make the above-mentioned frequency information of this presetter device record invalid, corresponding to the structure of the frequency range that is write down by this presetter device before writing down this frequency information at this presetter device, and deletion is by the structure (the 6th aspect below corresponding) of the frequency information of this presetter device ever recorded.
In other words, the automatic channel choice device has a receiving system, is used for according to detecting receivable broadcasting station in the reception information of receive frequency, and a presetter device, is used for writing down automatically the frequency information of the broadcasting station of this detection.This automatic channel choice device also has an invalidation means, is used to make by the presetter device record, invalid about some frequency information of broadcasting station.The frequency information that is judged as the broadcasting station that can not normally export in the frequency information of broadcasting station is detected by this receiving system.
Therefore, the frequency information of presetter device recorded announce platform, this broadcasting station can normally be exported from receiving the broadcasting station.About the broadcasting station that can not normally export,, do not write down its frequency information because presetter device becomes invalidly.Therefore, avoided waste, that is, the frequency information of the broadcasting station that record can not normally be exported, making to preset automatically effectively becomes possibility.
A second aspect of the present invention is characterised in that in the frequency information of the receivable broadcasting station of being detected by receiving system, judgment means is judged the record of the frequency information of broadcasting station, and this frequency information is judged as and can not normally exports, and is deactivated by presetter device.According to the correctly definite frequency information of judged result by the presetter device record.The judgement of the record of the above-mentioned frequency information that passes through presetter device, the frequency information that did not also write down according to this presetter device up to the present, and the frequency information that this presetter device has write down is in the past adjudicated.Therefore, the frequency information that can determine to be judged as the broadcasting station that can not normally export be can't help this presetter device record at last, but the frequency information that only is judged as the broadcasting station that can normally export is by this presetter device final entry.Therefore, avoid waste, that is, the frequency information of the broadcasting station that record can not normally be exported, making to preset effectively automatically becomes possibility.
Aspect the 3rd of the present invention, it is the replenishing of device of first aspect, the broadcasting station information that recording device records is relevant with the broadcasting station, and judge that by use broadcasting station information can the frequency information of broadcasting station normally export.Preferably, the broadcasting station information of this record is the information (can identify the information of as shown in Figure 4 channel, output and information initial point) relevant with digital radio stations.In other words,, just can obtain the frequency information of those broadcasting stations if write down the broadcasting station information relevant in advance with the broadcasting station that can not normally export, thus easy invalid presetter device.
According to a forth aspect of the invention, it is characterized by, position detecting device detects the current location of receiving system, and uses from the current location information of position detecting device with from the broadcasting station information of tape deck, is chosen in that current location can receive but the broadcasting station that can not normally export.The frequency information of the broadcasting station of this selection becomes the frequency information that is judged as the broadcasting station that can not normally export.Therefore, by extraction be recorded in the tape deck broadcasting station information and in the receivable broadcasting station of current location, can obtain the frequency information of the broadcasting station that can not normally export, thereby can on the broadcasting station that can normally export, preset automatically effectively.
A fifth aspect of the present invention is characterized as, and second receiving system is provided for the automatic channel choice device, and this second receiving system has the function of selecting the frequency information of particular broadcast station from the frequency information that receives.This second receiving system selects to be judged as the frequency information of the broadcasting station that can not normally export.Therefore, were it not for tape deck, the frequency information that is judged as the broadcasting station that can not normally export can obtain from this second receiving system, and avoids presetting.Therefore, it is possible presetting automatically outside the broadcasting station that can not normally export.
According to a sixth aspect of the invention, the frequency information that is judged as the broadcasting station that can not normally export is deleted from the frequency information by the presetter device record.In other words, invalidation means makes presetter device invalid by deleting unnecessary frequency information, and erasure determination apparatus is judged as invalid frequency information.Therefore because from the content of record, delete with the frequency information of the corresponding broadcasting station, broadcasting station that can not normally export, so only the frequency information final entry of the broadcasting station that can normally export in presetting automatically.
In addition, according to a seventh aspect of the invention, frequency channel-selection assembly is selected channel by this way, promptly, in the frequency information of the broadcasting station of being detected by receiving system, the frequency information except being judged as the frequency information that can not normally export is the target of presetter device record.Because receiving system does not receive the frequency of obtaining by the frequency information that is judged as the broadcasting station that can not normally export, therefore can preset automatically effectively.The frequency information that is judged as the broadcasting station that can not normally export does not preset, thereby presetter device only writes down the frequency information that is judged as the broadcasting station that can normally export.
The accompanying drawing summary
Figure 1A is the broadcasting oscillogram of analog broadcasting;
Figure 1B is the broadcasting oscillogram of digital broadcasting;
Fig. 2 is the key diagram of example of the broadcast area of analog broadcasting and digital broadcasting;
Fig. 3 is the block diagram that is used for the receiving system of analog television broadcast according to an embodiment of the invention;
Fig. 4 is the information table of digital radio stations;
Fig. 5 is the flow chart that presets processing according to the use microcomputer of first embodiment automatically;
Fig. 6 is the receiving system that is used for analog television broadcast and the block diagram that is used for the receiving system of digital television broadcasting according to second embodiment;
Fig. 7 is that the microcomputer according to the use simulated television receiving system of second embodiment presets the flow chart of processing automatically; With
Fig. 8 is that the microcomputer according to the use digital television receiving apparatus of second embodiment presets the flow chart of processing automatically.
Detailed description of preferred embodiment
(first embodiment)
Fig. 3 is the block diagram of one embodiment of the present of invention, and this embodiment is applied in the vehicle-mounted receiver apparatus that is used for analog television broadcast.The simulated television receiving system 50 that is used to receive analog television broadcast has antenna 51, front end 52, voice detector part 53, visual detector part 54, microcomputer 55 and memory 56, it carries out broadcast reception, demodulated received signal and preset the broadcasting station that can normally export automatically." normal output " is meant that image and sound exports in the mode that the user can discern and understand.Be used to detect the current location checkout gear 57 of current location, and be used to export the loud speaker 58 of broadcasting and monitor 59 and all be installed in automobile, and become two the use in the present embodiment as known navigation system etc.
Front end 52 has known high-frequency amplifier, local oscillator and frequency mixer etc., and it is according to television broadcasting ripple regeneration intermediate-freuqncy signal, and outputs it to voice detector part 53 and visual detector part 54.Voice detector part 53 has known detector circuit and amplifier circuit, and it is according to the intermediate-freuqncy signal voice signal of regenerating, and exports to loud speaker 58.Voice detector part 53 also will exist or not exist sound carrier to export to microcomputer 55.
Intermediate-freuqncy signal from front end 52 inputs to visual detector part 54.Visual detector part 54 has known detector circuit and amplifier circuit, and it and outputs it to monitor 59 according to the intermediate-freuqncy signal reproduced picture signal (composite signal) of input.Microcomputer 55 is controllers, and it comprises CPU, ROM, RAM and input-output interface.Microcomputer 55 controls are by the frequency of the local oscillator vibration of front end 52, and by receiving the frequency information that determines whether to preset respective broadcast from the input signal of voice detector part 53, there is or does not exist sound carrier in this input signal representative.
Memory 56 is known nonvolatile recording mediums, and its record presets the frequency information of broadcasting station and the information of the broadcasting station of avoiding being preset etc.According to present embodiment, in memory 56 (corresponding to storage device of the present invention), avoid the information of the broadcasting station (digital radio stations) of being preset to carry out record as broadcasting station of the present invention information.In other words, with reference to Fig. 4, memory 56 records are used for the channel 60 of identification of broadcast platform, are used for determining the output 61 of broadcast area and latitude 62 and the longitude 63 that is used for determining as template the position of broadcasting station.
Current location checkout gear 57 has magnetic field sensor, gyroscope, range sensor and GPS (global positioning system) receiver etc., and it utilizes interpolation method that current location information is exported to microcomputer 55.After the output of reception from simulated television receiving system 50, loud speaker 58 output sounds and monitor 59 display images.The TFT LCD is used as monitor 59 usually, but also can use CRT monitor or display of organic electroluminescence etc.In having the simulated television receiving system 50 of said structure, behind the automatic prepositioned instruction of issue, microcomputer 55 beginning as shown in Figure 5 preset processing automatically.
Referring to Fig. 5, at first in step 101 (below be abbreviated as " S "), microcomputer 55 obtains current location information from current location checkout gear 57.After receiving current location information, in step S102, based on the channel of the information estimation digital radio stations that is stored in the digital radio stations in the memory 56 with at the receivable broadcasting of current location (corresponding to frequency information of the present invention).That is, in step S102, judge the estimation channel (corresponding to judgment device of the present invention) of the digital radio stations that can not normally export in current location.As estimating and measuring method, the position of broadcast transmission platform limits by latitude 62 and the longitude 63 as template, and broadcast area is determined by exporting 61 then.Then, judge whether and to receive by current location information and the broadcast area that obtains from current location checkout gear 57, to estimate receivable digital radio stations.
In step S103, microcomputer 55 control local oscillators are with the frequency outside the channel of digital radio stations of vibrating, and wait is from the input of voice detector part 53.Simulated television receiving system 50 is selected the broadcasting station of a specified channel.In the channel selection of step S103 is handled, be not chosen in the frequency that is judged as the digital radio stations that normally to export among the step S102, so that do not preset this digital radio stations, because they are invalid.
During the channel selection of the simulated television receiving system of carrying out in step S103 50 is handled, after the broadcast wave amplification of high-frequency amplifier with antenna 51 receptions of front end 52, broadcast wave after frequency mixer will amplify mixes with the local oscillated signal that is vibrated by local oscillator, to produce the intermediate-freuqncy signal of this broadcast wave, this intermediate-freuqncy signal is sent by the broadcasting station of the channel of microcomputer 55 appointments.When obtaining the intermediate-freuqncy signal of specific channel from the television broadcasting ripple, local oscillated signal is necessary.Consider that intermediate frequency is the situation of 58.75MHz, for example, the local oscillated signal (frequency+intermediate frequency of broadcasting station) of vibration 150MHz is to receive the broadcasting of 91.25MHz (1CH).The intermediate-freuqncy signal of this generation is exported to voice detector part 53 and visual detector part 54, even select arbitrary channel, this intermediate-freuqncy signal also can change into has same frequency.
When this intermediate-freuqncy signal inputed to voice detector part 53, voice detector part 53 was extracted sound if signal (hereinafter referred to as " SIF ") at interval by using the 4.5MHz between sound carrier and image carrier.Then, this detector circuit is removed carrier wave with the regeneration voice signal from this SIF.By judging the level of this sound carrier signal (corresponding to reception information of the present invention), will exist or not exist sound carrier to export to microcomputer 55.In output broadcasting, after the amplifier amplification, this voice signal is exported to loud speaker 58.
After the channel selection of step S103 is handled, from voice detector part 53, whether the existence of sound carrier is exported to microcomputer 55, handle advancing to step S104.In step S104, the existence that microcomputer 55 is judged the broadcasting station according to the existence whether judgement of sound carrier whether.
When not detecting sound carrier and judging that the broadcasting station does not exist (step S104: do not have the broadcasting station), handle advancing to step S105.On the other hand, when detecting sound carrier and judgement and have the broadcasting station (step S104: have the broadcasting station), after the frequency information that receives the broadcasting station was stored in the memory 56 relevant with initialize switch, processing proceeding to step S105.
In step S105, judge whether the search of each channel outside the channel of digital radio stations is finished.(step S105: not), the channel that is vibrated by local oscillator is not arranged on next channel (step S108), handles then and gets back to step S103 when judging that search is finished.Repeat said process, up to the search of finishing each channel.When judging that search is finished (step S105: be), pre-set channel is as a result of by announcement (step S106), and processing is preset in end automatically.
In the present embodiment, simulated television receiving system 50 is corresponding to receiving system, and digital radio stations is corresponding to the broadcasting station that can not normally export.Memory 56 is corresponding to storage device, and current location checkout gear 57 is corresponding to position detecting device.Microcomputer 55 has the function corresponding to presetter device and invalidation means.Step S107 carries out the processing corresponding to presetter device.
According to the first above-mentioned embodiment, except the digital radio stations that in simulated television receiving system 50, can not normally export, can preset processing automatically.That is, can select and preset the broadcasting station that normally to export automatically.When selecting the broadcasting station, will remove at the channel bank of the receivable digital radio stations of current location the channel that is being about to search for, thereby can preset automatically effectively.That is to say,, do not judge that whether digital radio stations exists, therefore reduce the processing time of presetting automatically because for digital radio stations.
In the present embodiment, though the sign on that presets automatically according to user's input starts, it also can automatically start from previous preset automatically back elapsed time or travel distance etc. according to when not exporting broadcasting.When output broadcasting becomes when being difficult to receive, preset automatically automatically to start.
(second embodiment)
In aforesaid first embodiment, avoid the information (template) of the broadcasting station of being preset to preset processing automatically by use.Information stores is in the memory 56 of simulated television device 50.On the other hand, when when automobile also provides digital television receiving apparatus, even avoid the information of the broadcasting station of being preset not to be stored in the memory 56 of simulated television receiving system 50, it also is possible avoiding mistake to preset in simulated television receiving system 50.In the present embodiment, simulated television receiving system 50 avoids mistake to preset according to the result who presets automatically of the receiving system by being used for digital television broadcasting.
Second embodiment will be discussed in more detail below, and it concentrates on the thing different with above-mentioned first embodiment.As shown in Figure 6, use simulated television receiving system 50 and digital television receiving apparatus 70 in the present embodiment.The structure of simulated television receiving system 50 is similar to the simulated television receiving system among above-mentioned first embodiment, and also structure like this of loud speaker 58 and monitor 59, so that can export from digital television receiving apparatus 70.
Digital television receiving apparatus 70 has antenna 71, front end 72, ofdm demodulator part 73, mpeg decoder 74, microcomputer 75 and memory 76, and it carries out digital television broadcasting and receives, the demodulation of received signal and be used for presetting automatically of digital radio stations.
Front end 72, the front end of its similar in simulated television receiving system 50, its is according to from the reception broadcast wave of antenna 71 regeneration intermediate-freuqncy signal, and outputs it to ofdm demodulator part 73.Ofdm demodulator part 73 produces the MPEG-TS signal by known methods such as modulation, fast Fourier transform (FFT) reconciliation mappings from this intermediate-freuqncy signal.Simultaneously, ofdm demodulator part 73 is exported to microcomputer 75 with the information relevant with the incoming level and the error rate etc.Mpeg decoder 74 comprises the software and hardware of the signal by the compression of MPEG-TS method that is used to decompress, its reproduced picture signal and voice signal, and they are exported to monitor 59 and loud speaker 58 respectively.
Microcomputer 75 is controllers, the microcomputer 55 of its similar in simulated television receiving system 50.Microcomputer 75 is according to the frequency information that judges whether to preset respective broadcast from the incoming level of ofdm demodulator part 73 and bit error rate etc.Then, the frequency information that this is preset the broadcasting station is exported to the microcomputer 55 of simulated television receiving system 50.The frequency information of broadcasting station etc. is preset in memory 76 storage, and its memory 56 as simulated television receiving system 50 is made up of nonvolatile recording medium.
The microcomputer 55 of simulated television receiving system 50 is so constructed so that can communicate by letter each other with the microcomputer of digital television receiving apparatus 70 75.When order was preset automatically in simulated television receiving system 50, as shown in Figure 7, processing was preset in microcomputer 55 startups automatically.Referring to Fig. 7, in step S201, the automatic prepositioned instruction of microcomputer 55 outputs is given the microcomputer 75 (checking flow chart A) in the digital television receiving apparatus 70.When digital television receiving apparatus 70 received this automatic prepositioned instruction, microcomputer 75 control local oscillators made that with the frequency of the digital radio stations that vibrates (Fig. 8: step S301) is handled in selection in enterprising line frequency road, the broadcasting station of specified channel.
During the channel selection of the digital television receiving apparatus 70 that carries out in the step S301 of Fig. 8 is handled, after the radio-frequency amplifier circuit amplification of broadcast wave through front end 72 that antenna 71 receives, frequency mixer mixes this broadcast wave with the local oscillated signal that vibrates by local oscillator.Then, microcomputer 75 produces the intermediate-freuqncy signal of this broadcast wave that sends from the broadcasting station of specified channel.
Then, this intermediate-freuqncy signal inputs to ofdm demodulator part 73.Convert discrete signal as the ofdm signal of analog signal to by analog-to-digital conversion as digital signal.By after quadrature detection, this discrete signal being carried out the FFT conversion, demodulate the complex data symbol.The complex data symbol of this demodulation through frequency interlacing, time-interleaved, separate modulation, separate mapping, Veterbi decoding and RS decoding etc., convert the MPEG2-TS signal to, it is a primary signal.
This MPEG2-TS signal by the demodulation of ofdm demodulator part is exported to mpeg decoder 74, and the incoming level that will obtain in demodulation and bit error rate are exported to microcomputer 75.Mpeg decoder 74 is known decoders, its decoding MPEG2-TS signal, and, picture signal and voice signal are exported to monitor 59 and loud speaker 58 respectively in order to export broadcasting.
After the channel selection in step S301, when ofdm demodulator part 73 is exported to microcomputer 75 with incoming level and bit error rate, handle advancing to step S302.In step S302, the existence that microcomputer 75 is judged the broadcasting station according to this incoming level and bit error rate whether.When judging that the broadcasting station does not exist (step S302: do not have the broadcasting station), handle advancing to step S303.On the other hand, when judging that the broadcasting station exists (step S302: have the broadcasting station), the frequency information of this respective broadcast is stored in (step S305) in the memory relevant with initialize switch 76, and processing advances to step S303.
In step S303, judge whether to finish the search of each channel.(step S303: not), the channel that is about to search is set to next channel (step S306), handles then and gets back to step S301 when judging that this search is not finished.Repeat said process, up to the search of finishing each channel.When judging that this search is finished (step S303: be), the frequency information that is stored in the broadcasting station in the memory 76 sends in the microcomputer 55 in the simulated television receiving system 50 (step S304).On the other hand, in simulated television receiving system 50, after digital television receiving apparatus 70 is exported in the instruction that will be used for presetting automatically in step S201 as shown in Figure 7, handle and advance to step S202, and this processing in channel selection processing and the digital television receiving apparatus 70 starts simultaneously.
In step S202, as the situation in first embodiment, the broadcast wave that front end 52 receives according to antenna 51 produces the intermediate-freuqncy signal of broadcast wave, and it sends from the broadcasting station by the channel of microcomputer 55 appointments.Then, voice detector part 53 is judged the level of sound carrier signals, and whether sound carrier existed exports to microcomputer 55.When whether this sound carrier exists when voice detector part 53 is exported to microcomputer 55, handle and advance to step S203, in this step, the existence that microcomputer 55 is judged broadcasting stations is whether.When judging that the broadcasting station does not exist (step S203: the broadcasting station does not exist), handle advancing to step S204.On the other hand, when judging that the broadcasting station exists (step S203: the broadcasting station exists), the frequency information of this reception broadcasting station is stored in (step S206) in the memory relevant with initialize switch 56, and processing advances to step S204.
In step S204, judge whether to finish the search of each channel (frequency).(step S204: not), the channel that is about to search is set to next channel (step S207), and handles and get back to step S202 when judging that this search is not finished.Repeat said process, up to the search of finishing each channel.When judging that this search is finished (step S204: be), handle advancing to step S205.In step S205, according to the frequency information of the digital radio stations that receives from digital television receiving apparatus 70, the frequency information of deletion digital radio stations from the frequency information that presets the broadcasting station.Then, presetting processing automatically finishes.
In the present embodiment, simulated television receiving system 50 is corresponding to receiving system, and digital television receiving apparatus 70 is corresponding to second receiving system, and digital radio stations is corresponding to the broadcasting station that can not normally export.Microcomputer 55 has the function corresponding to presetter device and invalidation means, and step S206 and step S205 carry out the processing corresponding to presetter device and invalidation means separately.
According to above-mentioned second embodiment, digital television receiving apparatus 70 obtains the frequency information of digital radio stations, and simulated television receiving system 50 carries out presetting automatically outside the digital radio stations, is possible thereby avoid mistake to preset.Because therefore presetting automatically and being undertaken by the presetting automatically simultaneously of analog broadcasting platform of simulated television receiving system 50 of the digital radio stations by digital television receiving apparatus 70 carried out presetting automatically by avoiding mistake to preset effectively.
In a second embodiment, behind the frequency information of deletion digital radio stations, if there is the initialize switch that any broadcasting station is not set, the frequency information of the analog broadcasting platform that then presets after it can up move and reset.When deletion was arranged on the frequency information of the digital radio stations on the 3rd initialize switch, for example, the frequency information that is arranged on the broadcasting station on the 4th initialize switch was reset on the 3rd initialize switch.
In the later stage of presetting processing automatically, the frequency information (step S205) of deletion digital radio stations from the memory 56 of simulated television receiving system 50.Yet, channel selection in simulated television receiving system 50 (step S202) can be obtained the frequency information of digital radio stations before from digital television receiving apparatus 70, and can carry out this channel selection (step S202) by the channel of getting rid of digital radio stations from the channel of search in advance.In addition, make the automatic prepositioned instruction of transmission become possibility such as such input units such as switches to digital television receiving apparatus 70.In such cases, microcomputer 75 start as shown in Figure 8 preset processing automatically, except step S304.
The present invention is not limited to the foregoing description, but can carry out in the different embodiment of the scope that does not deviate from main idea of the present invention.For example, the present invention is not confined on the analog or digital radiovisor, as long as but the radio wave that mixing is normally exported in the receive frequency wave band of receiving system and the radio wave of undesired output just can be used the present invention, therefore, prevent that the radio wave that receiving system presets undesired output automatically from being possible.
In above-mentioned any embodiment, analog broadcasting platform and digital radio stations are in diverse location, if but the broadcasting station sends analog broadcasting and digital broadcasting from same position, and have only the broadcasting station of normal output to preset automatically in a similar manner.
Claims (8)
1, a kind of automatic channel choice device comprises:
Receiving system is used for detecting receivable broadcasting station according to the reception information in the frequency that receives;
Presetter device is used for writing down automatically the frequency information of the broadcasting station of this detection;
Tape deck is used to write down the broadcasting station information relevant with described broadcasting station;
Position detecting device is used to detect the current location of described receiving system;
Decision maker is used for judging by using by the current location of this position detecting device detection with by the broadcasting station information of described recording device records whether the frequency information of described broadcasting station can normally be exported;
Invalidation means is used for judging that at described decision maker the frequency information of described broadcasting station is under the situation of improper output, and it is invalid to make described presetter device write down the frequency information of described broadcasting station.
2, automatic channel choice device according to claim 1 further comprises:
Delete device is used for deleting the frequency information that is judged to be the described broadcasting station of improper output by described decision maker from the frequency information of described presetter device record.
3, automatic channel choice device according to claim 1 and 2, wherein, being judged to be the broadcasting station that can not normally export by described decision maker is digital radio stations.
4, a kind of automatic channel choice device comprises:
Receiving system is used for detecting receivable broadcasting station according to the reception information in the frequency that receives;
Presetter device is used for writing down automatically the frequency information of the broadcasting station of this detection;
Tape deck is used to write down the broadcasting station information relevant with described broadcasting station;
Position detecting device is used to detect the current location of described receiving system;
Decision maker is used for judging by using by the current location of this position detecting device detection with by the broadcasting station information of described recording device records whether the frequency information of described broadcasting station can normally be exported;
Determine device, be used for determining whether be disabled by the record of frequency information that described decision maker is judged to be the described broadcasting station of improper output;
Wherein said presetter device does not write down the frequency information that is defined as invalid broadcasting station by described definite device, and record is defined as the frequency information of effective broadcasting station by described definite device.
5, automatic channel choice device according to claim 4 further comprises:
Delete device is used for deleting the frequency information that is judged to be the described broadcasting station of improper output by described decision maker from the frequency information of described presetter device record.
6, according to claim 4 or 5 described automatic channel choice devices, wherein, being judged to be the broadcasting station that can not normally export by described decision maker is digital radio stations.
7, a kind of automatic channel choice device comprises:
Receiving system is used for detecting receivable broadcasting station according to the reception information in the frequency that receives;
Presetter device is used for writing down automatically the device of frequency information of the broadcasting station of this detection,
Tape deck is used to write down the broadcasting station information relevant with described broadcasting station;
Position detecting device is used to detect the current location of described receiving system;
Decision maker is used for judging by using by the current location of this position detecting device detection with by the broadcasting station information of described recording device records whether the frequency information of described broadcasting station can normally be exported; And
Choice device is used for selecting, so that the frequency information except described decision maker is judged to be the frequency information of improper output is the target that described presetter device will write down in the frequency information of the broadcasting station that described receiving system detects.
8, automatic channel choice device according to claim 7, wherein, being judged to be the broadcasting station that can not normally export by described decision maker is digital radio stations.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP105822/2003 | 2003-04-09 | ||
| JP2003105822A JP3812545B2 (en) | 2003-04-09 | 2003-04-09 | Automatic channel selection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1543080A CN1543080A (en) | 2004-11-03 |
| CN1327626C true CN1327626C (en) | 2007-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100334884A Expired - Fee Related CN1327626C (en) | 2003-04-09 | 2004-04-09 | Automatic channel selecting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3812545B2 (en) |
| CN (1) | CN1327626C (en) |
| DE (1) | DE102004017490B4 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377579C (en) * | 2004-11-19 | 2008-03-26 | 厦门华侨电子股份有限公司 | TV-set frequency channel presetting method |
| JP2008017292A (en) | 2006-07-07 | 2008-01-24 | Denso Corp | Radio broadcast receiver and automatic tuning device for radio broadcast |
| CN101686488B (en) * | 2008-09-24 | 2012-09-19 | 中国移动通信集团安徽有限公司 | Service processing method, processing system and work sheet processing device |
| CN101567735B (en) * | 2009-05-14 | 2011-05-18 | 旭丽电子(广州)有限公司 | Method for processing data broadcasting signals |
| CN101621302B (en) * | 2009-08-06 | 2013-07-10 | 东莞市德生通用电器制造有限公司 | Portable tuning mode radio receiver |
| WO2012085971A1 (en) * | 2010-12-22 | 2012-06-28 | 三菱電機株式会社 | Broadcast receiver |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06303108A (en) * | 1993-04-15 | 1994-10-28 | Fujitsu Ten Ltd | Automatic preset device |
| CN1251236A (en) * | 1997-01-24 | 2000-04-19 | 三洋电机株式会社 | TV receiver |
| CN1381132A (en) * | 2000-05-29 | 2002-11-20 | 松下电器产业株式会社 | Channel selection apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5014348A (en) * | 1988-04-01 | 1991-05-07 | Uniden America Corporation | Self-programming scanning radio receiver |
| DE4442413A1 (en) * | 1994-11-29 | 1996-05-30 | Bosch Gmbh Robert | Procedure for setting up a mobile radio receiver and radio receiver |
| JP3549361B2 (en) * | 1997-05-13 | 2004-08-04 | 三菱電機株式会社 | Digital audio broadcasting receiver |
-
2003
- 2003-04-09 JP JP2003105822A patent/JP3812545B2/en not_active Expired - Fee Related
-
2004
- 2004-04-08 DE DE102004017490.3A patent/DE102004017490B4/en not_active Expired - Fee Related
- 2004-04-09 CN CNB2004100334884A patent/CN1327626C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06303108A (en) * | 1993-04-15 | 1994-10-28 | Fujitsu Ten Ltd | Automatic preset device |
| CN1251236A (en) * | 1997-01-24 | 2000-04-19 | 三洋电机株式会社 | TV receiver |
| CN1381132A (en) * | 2000-05-29 | 2002-11-20 | 松下电器产业株式会社 | Channel selection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004017490B4 (en) | 2014-07-31 |
| JP2004312563A (en) | 2004-11-04 |
| CN1543080A (en) | 2004-11-03 |
| DE102004017490A1 (en) | 2004-10-28 |
| JP3812545B2 (en) | 2006-08-23 |
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