CN1233164C - Digital broadcast receiver and digital broadcast station selector - Google Patents

Abstract

To distribute EPG showing a digital terrestrial broadcast program that can be received in a present position of a mobile/portable reception terminal.A communication station 106 receiving EPG request information 151 with environment information 151a comprising position information from a broadcast reception terminal 100 retrieves a database 107 storing a broadcast program which can be received at every environment information comprising position information as EPG 108 based on received environment information 151a and returns retrieved EPG to the broadcast reception terminal 100 as selection EPG 154a. The broadcast reception terminal 100 selects the broadcast program from returned selection EPG154a and receives it from a radio tower 101 broadcasting a broadcast radio wave from the broadcast station so as to view it. Position information 151a<SB>1</SB>on latitude/longitude, altitude and moving speed/moving direction, terminal machine type information 151a<SB>2</SB>can be contained in environment information 151a and weather information 153 on a place where the broadcast reception terminal 100 is located in a retrieval condition of the database 107.(C)2004,JPO .

Description

Digital broacast receiver and digital broadcast station selector

Technical field

The present invention relates to digital broacast receiver, on general seat formula receiving system basis, also relate to car-mounted terminal or portable phone and PDA digital broadcastings such as (Personal Digital Assistants) and receive portable terminal device, relate to digital broadcast station selector in addition, constitute the digital broadcast receiving terminal called station digital radio stations and the digital broadcasting method of channel selection of this station selector.

Above-mentioned digital broadcasting is any one of ground roll, satellite ripple accordingly, wherein especially with the object that broadcasts as towards moving body.

Background technology

Technical specification at received terrestrial digital broadcasting, especially in the ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) that Japanese scheduled broadcast begins, in modulation system, adopt OFDM (the Orthogonal Frequency DivisionMultiplexing: OFDM) that uses a plurality of carrier waves (carrier wave).In this modulation system, disturb based on ghost image also can be suppressed from a plurality of propagation paths (multipath) such as reflection of building.In addition, in ISDB-T, the protection on the transfer mode in regulation carrier spacing and the modulation system of every kind of carrier wave, the time-axis direction that is provided with by each effective code element length has been prescribed a plurality of at interval respectively, and very Duo signal form is allowed on specification.Receive and move the form that the best is selected in services such as receptions according to fixing in the middle of them in practice.

Among this external ISDB-T, 1 channel (band amplitude is about 5.6MHz) is divided into 13 sections (1 sections=about 430kHz), it is changed modulation system by unit.Like this, in 1 channel, according to the form of voice broadcast service and HDTV (High-Definition Television) broadcasting, standard fixed broadcasting and moving body broadcasting, but arbitrary decision signal in broadcasting station constitutes.

In addition, because ISDB-T is taken into interweaving of time-axis direction, the electric wave that is utilized also is suitable for the transmission to moving body, even thereby in portable terminal devices such as mobile receivers such as in-car TV, PDA portable phone, also can realize stable reception, this is listed as one of principal character.From now on, relevant the providing of service of having imagined this mobile reception also has bigger expectation.

For this point, because in mobile receiving systems such as in-car TV, can carry the capacity of display up to a certain degree display, especially do not have necessity of miniaturization and, and possess sufficient supply of electric power source, thereby can receive corresponding with broadband.

Fig. 8 is a kind of accompanying drawing of mode of the data configuration example of this ground TV broadcast of expression service.As shown in Figure 8, in data segment 801, the total that is received 803,6 sections moving bodys 804 and 6 sections SDTV of reception (Standard Definition TV, standard television), 805 compositions by 1 section voice is configured for 13 sections.In in-car TV etc.,, can obtain enough amount of information by having adopted broadcast service with data segment 1 that data shown in Figure 8 constitute.In addition, though data segment 801 is converted into the transmission frequency spectrum (OFDM section) 802 of frequency axis, this moment, be configured to 13 sections central sections with the part 806 (A stratum) that voice receive 803 corresponding 1 section reception.

Fig. 9 is the accompanying drawing of other configuration example of the expression data segment that is used for received terrestrial digital broadcasting service.As shown in Figure 9, at data segment 901, receive 904 13 sections of forming by 1 section portable reception 903 and 12 sections HDTV (High-Definition Television) and be configured.Same with mode shown in Figure 8, though data segment 901 is converted into the transmission frequency spectrum (OFDM section) 902 of frequency axis, this moment, the part 905 (A stratum) of the 1 section reception corresponding with portable reception 903 is configured to the central sections of 13 sections medium frequency axles.

In addition, under mode shown in Figure 9, in data segment 901, receive 904, also consider to be divided into the broadcast service that SDTV receives variety of ways such as 2 channels are disposed these 12 sections though all be assigned to HDTV (High-Definition Television) with 12 sections beyond the portable reception 903.

As mentioned above, received terrestrial digital broadcasting adopts the mode that is suitable for moving reception and portable reception, with the various wave interference influences that generally are vulnerable in the electric wave transfer path, generation noise, picture disappearance, synchronous unusual analog television broadcast are compared, can not be subjected to influences based on moving the environmental change that waits, and realizes stable reception.

Yet, even in received terrestrial digital broadcasting, according to reception environment, sometimes the received power of electric wave also can seem faint, or noise stack aggravation, especially the intensity of received signal with the time all changes the bigger environment of influence of fading under, the preferable image of can not regenerating sometimes.

As method corresponding to this reception environment deterioration, in receiving system, detect accepting state, the mode of the broadcasted content that automaticallyes switch in view of the above etc. is suggested.(such as, with reference to the digital broacast receiver of record in the patent documentation 1～3.)

[patent documentation 1]

Te Kaiping 9-107303 communique

[patent documentation 2]

The spy opens the 2002-176594 communique

[patent documentation 3]

The spy opens the 2002-218341 communique

Summary of the invention

In digital broacast receiver, there is not the intermediateness of the reception situation of the sort of " fuzzy appear before one's eyes " in the relevant analog broadcasting, " though do not see but still can appear before one's eyes reluctantly " and so on, in fact only exist can receive and can not receive any one of this 2 values.That is, there is the relevant clear and definite threshold value that could receive.

Under the occasion of analog broadcasting, owing to there is the intermediateness of relevant reception situation, thereby look the intermediateness that the hearer can confirm accepting state, under the occasion of image confusion, can observe picture limit adjustment antenna direction in the limit, perhaps change the position of receiving system, the environment that is suitable for receiving with retrieval.

Yet in digital broadcasting, look the hearer under the occasion that can not receive broadcasting, the judgement that can not carry out current reception environment and be to be suitable for the environment of broadcast reception and can receive and so on to mobile place on which kind of degree to where.Especially coming by portable terminal under the occasion of receiving digital broadcast, looking hearer search and can receive the place of broadcasting and move.Owing to do not have the intermediateness of relevant reception situation, thereby exist the problem that can not obtain to become the information that is used to judge the criterion that can improve to its reception situation of moving fully to where.

In addition, for the broadcast reception in the fixed terminal, especially, there are the problems referred to above too to being equipped with the seat formula TV of antenna.Be disposed under the indoor occasion that still can not receive, existing and be difficult to know whether this indoorly exists receivable position, if exist, this position is in problem where actually.

Summary of the invention

The object of the present invention is to provide a kind ofly in digital broacast receiver, can obtain the technology of the information of relevant current reception situation.

In addition, carry out in the region that is subjected to certain qualification under the occasion of broadcast service, move to receive and portable reception in, according to the surrounding environment of looking the hearer, look the hearer the translational speed moving direction, look near the hearer the meteorological condition and the machine (kind) of receiver, audiovisual could be with difference.Thereby, the EPG (electric program guide, ElectronicProgram Guide) of the receivable broadcast program of expression can not be utilized as unified index.Especially move to receive and portable reception in owing to can not stipulate each broadcast station broadcast service area uniformly, thereby exist and be difficult to the correct data as the EPG of receivable electronics across-the-board in this service area is provided to the problem points of looking the hearer.

The object of the present invention is to provide a kind of in any one received terrestrial digital broadcasting receiving terminal of portable usefulness such as general seat formula (fixedly installing type), vehicle mounted and portable phone, PDA the also channel selection means of received terrestrial digital broadcasting applicatory.

In this manual, so-called " successive value " means not to be only to be " can receive " 2 values with " can not receive " and so on, but the different values more than 3.By utilizing the value more than 3 to show, when can representing the height of receiving sensitivity by the stage, the target that can clearly improve.So-called " Stage Value that 3 stages are above " means not to be 2 values of certain threshold value of wrapped folder, but 3 values that value is above.Utilize these values, can obtain being used to know that reception situation etc. improves the clue of direction.

(receiving system)

The present invention is a kind of digital broacast receiver, and it has: detecting unit, and it detects the receiving sensitivity of digital broadcasting; Display unit, it shows above-mentioned receiving sensitivity by successive value or the Stage Value more than 3 stages; And converting unit, it is converted to successive value or Stage Value 3 stages more than with tuner or the detected receiving sensitivity parameter of demodulation section with above-mentioned receiving sensitivity based on being received by digital broadcasting.

Like this, look the hearer and can hold receiving sensitivity situation under the current reception environment interimly, can carry out retrieval based on the judgement that could receive of environment adjustment and the environment that is suitable for receiving.

Among the present invention, it is characterized in that: above-mentioned receiving sensitivity utilization is received by digital broadcasting and calculates with tuner or the detected receiving sensitivity parameter of demodulation section.

It is characterized in that in addition: above-mentioned receiving sensitivity parameter comprises at least 1 among received power, C/N ratio, the BER.

As the parameter that is used for measuring in digital broadcasting receiving sensitivity, received power, C/N are generally more well known than (carrier wave/noise ratio, Carrier to Noise Rate), BER (Bit Error Rate, the error rate).These values are by modulation system and encoding rate, and it receives required lower limit difference.

Among the present invention, be characterised in that: above-mentioned receiving sensitivity comprises 2 kinds of receiving sensitivities that recently calculated separately by above-mentioned received power and C/N at least.

Like this, under the occasion that receiving sensitivity worsens, can express its main cause (received power a little less than, or noise is too much etc.).

Though can obtain such as sufficient in received power, but C/N is than under the low occasion, move to the place of having left the object that becomes the noise occurrence cause, under the low occasion of received power, to the place that does not have the electric wave veil, even veil is perhaps arranged, involve the different criterions relevant that move in the place of standing wave with receiving position but can receive reflection.

Among the present invention, be characterised in that: above-mentioned receiving sensitivity only is used for above-mentioned received power and C/N to calculate as parameter than the value of medium sensitivity than a low side.Like this, received power and C/N represent than can be used as the comprehensive receiving sensitivity of having unified.

Among the present invention, be characterised in that: above-mentioned receiving sensitivity is calculated from BER.

Be error free ground in digital broadcasting (undoubtedly like error) transmitted image signal, the BER value of RS (Ruide Suo Luomeng) sign indicating number decoding output is necessary for 1 * 10 ^-11Below.For this reason, the BER value of Veterbi decoding output is necessary for 2 * 10 ^-4Therefore can be that benchmark is calculated sensitivity with this value.

Among the present invention, be characterised in that: above-mentioned digital broacast receiver is calculated receiving sensitivity based on TMCC (transmission and multiplexing configuration control, the Transmission and Multiplexing Configuration Control) information of above-mentioned receiving sensitivity parameter and relevant broadcast wave transfer mode.Be characterised in that in addition: above-mentioned digital broacast receiver decides the desirable value of the necessary receiving sensitivity parameter of reception of digital broadcasting from above-mentioned TMCC information, by compare decision receiving sensitivity information with above-mentioned receiving sensitivity parameter.

The TS (transport stream) that so-called TMCC information is relevant each broadcasting channel and the information of load mode in the present invention, have been stipulated the necessary so-called desirable value of reception of the receiving sensitivity parameter in the respective broadcast load mode.Like this, can carry out receiving sensitivity exactly by selected each broadcast program shows.

Among the present invention, be characterised in that: above-mentioned digital broacast receiver decides required received power and required C/N ratio from above-mentioned TMCC information as the desirable value of above-mentioned receiving sensitivity parameter, by the received power and C/N ratio that relatively is detected as above-mentioned receiving sensitivity parameter, the decision receiving sensitivity.Such as, under the Gaussian noise environment, the required C/N under QPSK encoding rate 1/2 occasion is than being 4.9dB, the required C/N under 16QAM encoding rate 1/2 occasion is than being 11.5dB.The required electric field strength of relevant received power approximately requires 60dB μ V/m under the fixing occasion that receives in addition.

This external TMCC information that is made digital broadcasting by channel is by under the occasion of unified regulation, and required received power and required C/N ratio can in statu quo use setting.Under the receivable in the past in addition occasion, the TMCC information that can use at that time to be obtained.

Among the present invention, be characterised in that: above-mentioned digital broacast receiver possesses the communication unit of communicating by letter that carries out with the PERCOM peripheral communication platform is arranged, and can obtain above-mentioned TMCC information by communication unit.Though TMCC information is compound to broadcast wave usually and sends, the occasion that can not obtain TMCC information itself in the time can not receiving broadcast wave is also a lot, thereby receiving sensitivity parameter and fiducial value can not be compared.Therefore, it is effective obtaining this information via communication.That is, can carry out the demonstration of receiving sensitivity more reliably.

Among the present invention, be characterised in that: the received power evaluation function f (x that above-mentioned digital broacast receiver utilization is represented with the received power x that is detected as above-mentioned receiving sensitivity parameter and above-mentioned required received power x1, x1), the C/N evaluation function g (y that represents than y1 than y and above-mentioned required C/N with the C/N that is detected as above-mentioned receiving sensitivity parameter, y1) calculate each evaluation of estimate, the side that numerical value wherein is less is as receiving sensitivity Y.That is, become receiving sensitivity Y (%)=Min{f (x, x1), g (y, y1) }.

Utilization likens required received power, required C/N to the evaluation function that calculates benchmark into receiving sensitivity, by estimating received power and C/N ratio respectively independently, this is estimated a lower side as comprehensive receiving sensitivity, can show more substantial receiving sensitivity.

Among the present invention, be characterised in that: above-mentioned received power evaluation function f (x, x1) and above-mentioned C/N evaluation function g (y y1) is defined by following formula respectively:

[formula 1]

f(x，x1)：

(1)x＜a

f(x，x1)＝0

(2)a≤x≤b

$f(x,x1)=\frac{x-a}{x1-a}\&times;100$

(3)b＜x

$f(x,x1)=\frac{b-a}{x1-a}\&times;100$

[formula 2]

g(y，y1)：

(1)y＜c

g(y，y1)＝0

(2)c≤y≤d

$g(y,y1)=\frac{y-c}{y1-c}\&times;100$

(3)d＜y

$g(y,y1)=\frac{d-c}{y1-c}\&times;100$

But, supposing that a and b are the lower limit of regulation received power sensitivity and the constant of the upper limit, c and d are the lower limit of regulation C/N specific sensitivity and the constant of the upper limit.

By utilizing these evaluation functions, preset lower limit and higher limit arbitrarily are made as 100% receiving sensitivity with desirable value and show and become possibility.Each above-mentioned in addition calculating formula is to have adopted an example of linear function and logarithmic function, if showing, a kind of relevant sensitivity carries out the setting of the upper limit, lower limit, computational methods with the receiving sensitivity and the fiducial value (desirable value: receive necessary minimum) of reality are carried out relative evaluation then also can adopt other various functions.

Among the present invention, be characterised in that: above-mentioned received power evaluation function f (x, x1) and above-mentioned C/N evaluation function g (y, y1) in, constant x1, y1, a, b, c and d are decided by TMCC information.Like this, can being undertaken accurately by each selected broadcast program, receiving sensitivity shows.

Among the present invention, be characterised in that: above-mentioned digital broacast receiver also with above-mentioned received power evaluation function f (x, x1) and above-mentioned C/N evaluation function g (y y1) shows separately as above-mentioned receiving sensitivity.Like this, under the occasion that receiving sensitivity worsens, can express its main cause (received power a little less than, or noise is too much etc.).

Among the present invention, be characterised in that: above-mentioned digital broacast receiver compares by desirable value and the above-mentioned detected BER value to the necessary BER of digital broadcast reception, decides above-mentioned receiving sensitivity information.More particularly, above-mentioned detected BER is being made as z, when above-mentioned required BER is made as z1, the function h that utilization is represented by following formula (z z1) calculates evaluation of estimate, and utilizes it to decide above-mentioned receiving sensitivity information:

[formula 3]

h(z，z1)：

(1)z＜10exp(-k)

h(z，z1)＝0

(2)10exp(-k)≤z≤10exp(-l)

$h(z,z1)=\frac{\left|\log z\right|-k}{\left|\log \mathrm{<figure-callout\; id="1"\; label="z"\; filenames="C03158462.400591.png"\; state="\{\{state\}\}">z</figure-callout>}1\right|-k}\&times;100$

(3)10exp(-l)＜z

$h(z,z1)=\frac{l-k}{\left|\log \mathrm{<figure-callout\; id="1"\; label="z"\; filenames="C03158462.400591.png"\; state="\{\{state\}\}">z</figure-callout>}1\right|-k}\&times;100$

But, suppose that k and l are the constants of the regulation BER lower sensitivity limit and the upper limit.By utilizing this receiving sensitivity computational methods, preset lower limit, higher limit arbitrarily can be carried out that desirable value is made as 100% sensitivity and be shown.

Each above-mentioned in addition calculating formula is to have adopted an example of linear function and logarithmic function, if showing, a kind of relevant sensitivity carries out the setting of the upper limit, lower limit, computational methods with the receiving sensitivity and the fiducial value (desirable value: receive necessary minimum) of reality are carried out relative evaluation then also can adopt other various functions.

Among the present invention, be characterised in that: above-mentioned BER is detected Veterbi decoding output BER by the reception of digital broadcasting, and above-mentioned required BER is z1=2 * 10 ^-4Can carry out substantial sensitivity thus shows.

Among the present invention, be characterised in that: above-mentioned receiving sensitivity is as showing than the 2 dimension curve figure that are 2 with above-mentioned received power and above-mentioned C/N.By current reception situation being fixed a point, look the hearer and can visually hold the reception situation compactly at 2 dimension coordinates.Fig. 5 described later (c) shows that the display packing of example 3 is used as one and exemplifies out.

Among the present invention, be characterised in that: above-mentioned receiving sensitivity is as having represented that along time shaft at least one the curve chart among above-mentioned received power, the when above-mentioned BER of above-mentioned C/N shows.By with receiving sensitivity parameter along representing on the curve chart of time shaft, can hold the time dependent behavior of receiving sensitivity information, look the optimum reception position that the hearer can retrieve current location periphery simply.Fig. 5 described later (d) shows that the display packing of example 4 is used as one and exemplifies out.This external Fig. 5 (c) shows that the method that the time history of retention point 502 shows also is effective in the example 3.

Among the present invention, be characterised in that: above-mentioned receiving sensitivity demonstrates picture in the time of can not receiving after being lower than the necessary value of broadcast reception automatically.Like this, the user can be directly and is known the fact that can not receive at once.

Among the present invention, be characterised in that: picture is represented the reason that can not receive during above-mentioned can not the reception.Be characterised in that in addition: above-mentionedly can not receive the note that picture is relevant this reception situation.At this moment, as above-mentioned reception situation, also can show notes such as " being in outside the service area ", " electric wave arrives ", " because of The noise can not receive ".Like this, can make the user directly know the reception situation.

Among the present invention, be characterised in that: picture when above-mentioned can not the reception shows above-mentioned receiving sensitivity.Like this, can be in the time can not receiving, limit Direct observation receiving sensitivity, moving of antenna direction and place carried out on the limit reposefully.

Among the present invention, be characterised in that: the image display area of digital broadcasting and the viewing area of above-mentioned receiving sensitivity are separated.Like this, not only simultaneously display image and receiving sensitivity information, the limit is observed the image limit and is confirmed reception environment, but also can not show key frame, only confirms reception environment simply.

In the present invention, be characterised in that: when digital broadcasting received, after above-mentioned receiving sensitivity approached the necessary threshold value of broadcast reception, expression continued to receive the fact that is in unsafe condition.Like this, the user can recognize the fact that can not receive in advance.Such as, wish to proceed under the occasion of broadcast reception strong, can take under mobile status, to end to move and stop and wait certain countermeasure.

Among the present invention, be characterised in that: after above-mentioned receiving sensitivity is lower than the necessary threshold value of broadcast reception, make the viewing area that receives image not luminous.Like this, under can not the occasion of receiving digital broadcast, can not carry out any demonstration, only show receiving sensitivity information in above-mentioned other zone at above-mentioned image display area.Coming under the occasion of receiving digital broadcast by the little terminals of battery capacity such as mobile machine, especially portable phone of using charger (battery), can not accepting state although be in, be worthless but still make display frame keep the bright state this point.

This is under the occasion that makes same display multizoneization, and to emissive type, especially OLED display is effectively, and under the occasion that adopts a plurality of displays, not only emissive type also is effective in the LCD that adopts illuminating lamp.Different with simulated television, this two valued condition because a digital broadcasting picture that existence is received is appeared before one's eyes or do not appeared before one's eyes, thereby can not receive adjustment in observation picture limit, limit.Owing to realized the receiving sensitivity demonstration in the present invention, thereby only carrying out this zone and show just enough, is necessary from the viewpoint of low power consumptionization.

Among the present invention, be characterised in that: after above-mentioned receiving sensitivity is lower than the necessary threshold value of broadcast reception,, the brightness of above-mentioned display part is reduced according to the difference of above-mentioned receiving sensitivity and above-mentioned desirable value.By reducing brightness is reduced, not only can visually directly show and receiving sensitivity information also can suppress invalid power consumption along with sensitivity.This display for any kind is all applicable.

If above-mentioned in addition display part is semi-transparent mistake or permeation type liquid crystal display, wish to adjust the brightness of back of the body lamp, if reflection LCD wishes to adjust according to receiving sensitivity the brightness of headlight according to receiving sensitivity.Can realize low power consumptionization like this.Digital broacast receiver of the present invention is characterised in that: be a kind of mobile telephone, seat formula digital broadcast images receiver, portable information communication terminal (PDA etc.).

(system)

Among the present invention, a kind of digital broadcast station selector is provided, be a kind of by the digital radio stations of playing digital broadcasting, communicate the called station that circuit connects, can carry out with this called station between communicate by letter, and can receive the digital broadcast station selector that the digital broadcast receiving terminal from the broadcasting of above-mentioned digital radio stations constitutes, it is characterized in that: first, above-mentioned digital broadcast receiving terminal will be by the environmental information of the positional information that comprises the current location of representing this digital broadcast receiving terminal, required list is shown in the EPG (electric program guide of receivable broadcast program under the reception environment condition shown in this environmental information, the EPG solicited message that the EPG request of transmission Electronic Program Guide) is formed sends to above-mentioned called station, second, above-mentioned called station possesses the database of being deposited as EPG by the receivable broadcast program of each environmental condition that comprises positional information, based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned EPG solicited message that is received, retrieve the EPG of above-mentioned database, to under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned EPG solicited message, be returned to above-mentioned digital broadcast receiving terminal as selection EPG by receivable broadcast program thus, the 3rd, above-mentioned digital broadcast receiving terminal can be selected broadcast program arbitrarily from the above-mentioned selection EPG that foldback is returned, and receives selected this broadcast program from above-mentioned digital radio stations.

Like this, by provided expression corresponding with the reception environment conditions such as receiving position of looking the hearer by called station, the selection EPG of receivable broadcast program looks the hearer and can confirm receivable broadcast program on the current location, can carry out the channel selection of desirable broadcast program.In addition, for the broadcasting station, owing to can make audiovisual person that the existence of the broadcast service that is provided is provided, thereby can strive for more looking the hearer, in addition for called station, can obtain and to impose and to be accompanied by response from looking the hearer, carry out each strong point of communication line usage charges of the transmission of effective choice EPG from the EPG solicited message of looking the hearer.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in above-mentioned the 1st technological means, putting down in writing, above-mentioned digital broadcast receiving terminal possesses can obtain (the global positioning system from GPS, Global Positioning System) the GPS processing unit of the positional information of satellite, the above-mentioned positional information that comprises in the above-mentioned environmental information of this digital broadcast receiving terminal as the above-mentioned EPG solicited message that sends to above-mentioned called station adopts the positional information of being obtained by above-mentioned GPS processing unit.

Like this, look the hearer and need not to do it yourself to import the positional information of the digital broadcast receiving terminal that oneself uses and send, the EPG solicited message of the transmission of the EPG of the receivable broadcast program of request expression can be sent to called station immediately.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in the above-mentioned the 1st or the 2nd technological means, putting down in writing, send in the above-mentioned positional information that above-mentioned environmental information comprised of above-mentioned EPG solicited message of above-mentioned called station at above-mentioned digital broadcast receiving terminal, the latitude longitude information that not only comprises this digital broadcast receiving terminal place also comprises the information about height and/or translational speed and moving direction.

Like this, be not only the so-called two-dimensional position (plan position approach of latitude longitude) of looking the hearer place, the three-dimensional position that has also comprised short transverse information reaches about the information of looking hearer's motion also can be used as positional information and provides, and called station can provide the EPG that is more suitable in the audiovisual of looking the hearer.

Such as, even under two-dimensional state, be in same place, be in the people on building roof and be in underground people, and static people is different certainly with the receivable broadcast program of people in moving on the Shinkansen.The local environment of respectively looking the hearer place with this class also can be corresponding, and under each reception environment condition, the providing of EPG that is suitable for audiovisual becomes possibility.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in above-mentioned the 1st to the 3rd technological means is arbitrary, putting down in writing, above-mentioned called station is when detecting the EPG of above-mentioned database, can be used as the above-mentioned environmental information of the above-mentioned EPG solicited message that is received, the reception environment condition that contains terminal machine information based on above-mentioned digital broadcast receiving terminal, retrieve the EPG of above-mentioned database, can extract out and the EPG that has also comprised the reception environment term harmonization of above-mentioned terminal machine information from above-mentioned database, as above-mentioned selection EPG, be returned to above-mentioned digital broadcast receiving terminal.

Like this, called station can obtain the information about the receptivity shown in the terminal machine information of the digital broadcast receiving terminal that has sent the EPG solicited message, and the EPG corresponding with the receiving sensitivity of this digital broadcast receiving terminal can be provided.

Such as, by exterior aerial and seat formula V-type single-polarized antennas with receiving terminal of fixedly setting type fixing, move machine with the directivity antennas of receiving terminal and diversity antenna, portable digital broadcast receiving terminals such as telescopic antenna with receiving terminal, its receptivity is different.According to each different digital broadcast receiving terminal of its receptivity, providing of the EPG corresponding with different respectively receiving sensitivity just becomes possibility like this.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in above-mentioned the 1st to the 4th technological means is arbitrary, putting down in writing, above-mentioned called station is when detecting the EPG of above-mentioned database, the reception environment condition of the weather information of position shown in the above-mentioned positional information that contains in the above-mentioned environmental information of the above-mentioned EPG solicited message that can receive based on comprising, retrieve the EPG of above-mentioned database, can be from the EPG of above-mentioned database extraction with the reception environment term harmonization of the above-mentioned weather information that has also comprised position shown in the above-mentioned positional information, as above-mentioned selection EPG, be returned to above-mentioned digital broadcast receiving terminal.Like this, but additional packets provides the EPG of the audiovisual that is more suitable for looking the hearer around the weather environment information of looking the hearer.

Such as, even under same tree shade, receive broadcasting, generally also having when the rainy day and make broadcasting wave be hidden resistance by the leaf that drenches, receiving sensitivity worsens, on the other hand, the difference that receiving sensitivity takes a turn for the better when fine day.Equally, also can be different by humidity and its radio propagation environment of wind speed.Process like this, in time and the providing of EPG with the reception environment condition around the hearer place of respectively looking corresponding that change just becomes possibility.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in above-mentioned the 1st to the 5th technological means is arbitrary in the digital broadcast station selector of record, from the above-mentioned selection EPG of above-mentioned called station foldback by in the presumptive area of the region at the current place of the above-mentioned digital broadcast receiving terminal of expression only under normal condition receivable broadcast program constitute.

As mentioned above, under the occasion of the corresponding EPG of the detailed environmental information at the digital broadcast receiving terminal place that provides and receive, must be by called station (or utilize communication line to carry out the broadcasting station of this service and serve the dealer), carry out site test by actual, or simulate the information of once obtaining about the receiving sensitivity corresponding on a large scale with each reception environment condition at digital broadcast receiving terminal place, make the database of EPG that also can be corresponding with the reception environment condition of various parts.

Like this, with the presumptive area under the digital broadcast receiving terminal with range to a certain degree (such as, the coverage of the base station of adopting in the communication of relevant EPG (wireless area scope)) as least unit, if just simple economy ground realizes that each this zone of dispensing is in normal condition and thinks that the unit of the selection EPG that can carry out audiovisual also is effective.

Under the occasion that has adopted correlation unit, also have following context notification to the effect of looking the hearer: according to the reception environment condition at digital broadcast receiving terminal place, though the state of affairs of the selection EPG that received not corresponding (can not receive should receivable broadcasting etc.) also might take place, as long as otherwise but owing to be in normal accepting state in this zone and just can receive receivable general selection EPG, just thereby have a possibility that can receive broadcasting by the reception environment condition of changed number broadcast receiving apparatus a little.

Promptly, even received under the occasion that the digital broadcast receiving terminal of selecting EPG is in unusual particular surroundings (such as, look the hearer and be in occasionally near occasion the electric equipment that electric wave takes place to disturb etc. etc.), by the broadcast program of selecting the EPG notice, promptly, as long as be in the broadcast program that normal condition generally just can be carried out audiovisual for being received in this region, can propose to do slightly to the user from current location mobile, the intention that moves to receivable place.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in above-mentioned the 1st to the 6th technological means is arbitrary, in the digital broadcast station selector of record, be the guide look information of playing the broadcasting station of the receivable broadcast program of above-mentioned digital broadcast receiving terminal from the above-mentioned selection EPG of above-mentioned called station foldback.

Though the content of general EPG means the broadcast program contents and the timetable of current receivable each broadcasting station (broadcasting channel), but the occasion of the broadcasting station guide look information of broadcasting station name under a kind of expression of the imagination of the EPG in above-mentioned the 7th technological means what is called accepting state and channel.And, even such as the content that does not understand broadcast program, if in digital broadcast receiving terminal, could receiving of each broadcasting station can be represented as intelligible symbolic expression EPG, even then in such as portable small-sized display, it is less also can to carry out the display text number, but the demonstration that is easy to watch.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in above-mentioned the 7th technological means, putting down in writing, as above-mentioned selection EPG, the guide look information of above-mentioned broadcasting station of playing receivable broadcast program is by when above-mentioned called station foldback is returned, and above-mentioned digital broadcast receiving terminal can make the guide look information of the above-mentioned broadcasting station of being returned by foldback have a guide look of as the Channel icons of above-mentioned each the broadcast station broadcast channel of expression to show.Like this, can on such as portable miniscope, dwindle demonstration with the guide look of receivable broadcasting station concisely as the Channel icons guide look with digital broadcast receiving terminal.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in above-mentioned the 1st to the 8th technological means is arbitrary, putting down in writing, above-mentioned called station possesses the database of being deposited as broadcast service zone figure by the cartographic information of the broadcasting service area of the receivable broadcasting channel of each reception environment condition that comprises positional information representing by each broadcasting channel, based on the represented reception environment condition of above-mentioned environmental information that comprises in the above-mentioned EPG solicited message that is received, retrieve the above-mentioned broadcast service zone figure of above-mentioned database, the zone of the broadcast service of the peripheral receivable broadcasting channel of position or this position shown in the above-mentioned positional information that will comprise in the above-mentioned environmental information of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned EPG solicited message figure is as selecting broadcast service zone figure to be returned to above-mentioned digital broadcast receiving terminal thus.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of in above-mentioned the 9th technological means is arbitrary, putting down in writing, above-mentioned digital broadcast receiving terminal can be selected broadcasting channel arbitrarily from the above-mentioned selection broadcast service zone figure that is returned by foldback, and the broadcast service zone figure of this broadcasting channel is shown.

Like this, according to the above-mentioned the 9th and the 10th technological means, look the hearer and can easily know, can confirm to select the received broadcasting service area of the digital broadcasting shown in the figure of broadcast service zone and the relative position relation of the current location of oneself from the receivable place shown in the selection broadcast service zone figure that the called station foldback is returned.

Such as, be in the broadcast service exterior domain in the current location of looking the hearer, but exist near at hand under the occasion of broadcast service inner region of audiovisual broadcast, be to receive broadcasting, but can propose the intention that moves to reception site from current location.

Among the present invention, a kind of digital broadcast station selector is provided, it is characterized in that: in the digital broadcast station selector of record, above-mentioned digital broadcast receiving terminal is to fixedly install type terminal, vehicle mounted terminal or the portable terminal of using in above-mentioned the 1st to the 10th technological means is arbitrary.

Like this, especially because vehicle mounted terminal and portablely use under various reception environments with terminal, thereby occasion that generally can not receiving digital broadcast also has many.But, by the digital broadcast station selector of the arbitrary middle record of above-mentioned the 1st to the 10th technological means, digital broadcast receiving terminal is not only to be confined to fixedly install the type terminal, even in vehicle mounted terminal and portable with under the occasion of terminal, can effectively utilize yet.

Among the present invention, a kind of digital broadcast receiving terminal is provided, it is characterized in that: be a kind of carry out with called station between communicate by letter, and can receive digital broadcast receiving terminal from the broadcasting of digital radio stations, it will be by the environmental information of the positional information that comprises the current location of representing this digital broadcast receiving terminal, the EPG solicited message that required list is shown in the EPG request composition of the transmission of the EPG of receivable broadcast program under the represented reception environment condition of this environmental information sends to above-mentioned called station, when the above-mentioned EPG solicited message of response, with receivable EPG as selecting EPG, and/or respond above-mentioned EPG solicited message, the broadcast service zone figure of receivable broadcasting channel is schemed as selection broadcast service zone, by when above-mentioned called station foldback is returned, can from above-mentioned selection EPG, select broadcast program arbitrarily, receive selected this broadcast program from above-mentioned digital radio stations, and/or from the regional figure of above-mentioned selection broadcast service, making the broadcast service zone figure demonstration of broadcasting channel arbitrarily, the digital broadcast receiving terminal that can be used as the digital broadcast station selector that constitutes the arbitrary middle record of above-mentioned the 1st to the 11st technological means uses.

Like this, look the hearer and can confirm receivable broadcast program and broadcasting service area, can carry out the channel selection of desirable broadcast program in current location.

Among the present invention, a kind of called station is provided, it is characterized in that: be a kind of called station that communicates the connection of circuit, it possesses database, it will be by the receivable broadcast program of each reception environment condition that comprises positional information as EPG, and/or will represent to deposit as broadcast service zone figure by each broadcasting channel by the cartographic information of the broadcasting service area of the receivable broadcasting channel of above-mentioned each reception environment condition, possess EPG solicited message receiving element, its from can carry out with this called station between the digital broadcast receiving terminal of communicating by letter receive environmental information by the positional information that contains the current location of representing this digital broadcast receiving terminal, required list is shown in the EPG solicited message of the EPG request composition of the transmission of the EPG of receivable broadcast program under the represented reception environment condition of this environmental information; Selection information foldback unit, it is based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned EPG solicited message that is received by this EPG solicited message receiving element, retrieve the EPG and/or the broadcast service zone figure of above-mentioned database, thus will be under the above-mentioned reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned EPG solicited message receivable broadcast program as select EPG and/or will the broadcast service zone figure of the peripheral receivable broadcasting channel of the position shown in the above-mentioned positional information or this position as select broadcast service zone figure to be returned to above-mentioned digital broadcast receiving terminal, can be used as to constitute above-mentioned the 1st to the 11st technological means arbitrary in the called station of digital broadcast station selector of record use.

Like this, called station is corresponding with the receiving position of looking the hearer, the selection EPG of the receivable broadcast program of expression is provided and selects broadcast service zone figure, can obtain thus to impose and to follow response, carry out effective choice EPG and select the strong point of communication line usage charges of the transmission of broadcast service zone figure from the EPG solicited message of looking the hearer from looking the hearer.

Among the present invention, a kind of digital radio stations is provided, it is characterized in that: be a kind of digital radio stations of playing digital broadcasting, same with the above-mentioned called station of putting down in writing in above-mentioned the 13rd technological means, this digital radio stations possesses above-mentioned database, above-mentioned EPG solicited message receiving element, above-mentioned selection information foldback unit, and the digital radio stations that can be used as the digital broadcast station selector that constitutes the arbitrary middle record of above-mentioned the 1st to the 11st technological means uses.

Like this, digital radio stations is corresponding with the receiving position of looking the hearer, and the selection EPG of the receivable broadcast program of expression is provided, and can make audiovisual person that the existence of the broadcast service that is provided is provided thus, thereby can strive for more looking the hearer,

Among the present invention, a kind of digital broadcasting method of channel selection is provided, it is characterized in that: be a kind of digital broadcasting method of channel selection, by the digital radio stations of playing digital broadcasting, communicate the called station that circuit connects, can carry out with this called station between communicate by letter, and the digital broadcast receiving terminal that can receive from the broadcasting of above-mentioned digital radio stations constitutes, can carry out channel selection to digital broadcasting arbitrarily at this digital broadcast receiving terminal, first, above-mentioned digital broadcast receiving terminal will be by the environmental information of the positional information that comprises the current location of representing this digital broadcast receiving terminal, the EPG solicited message that required list is shown in the EPG request composition of the transmission of the EPG of receivable broadcast program under the represented reception environment condition of this environmental information sends to above-mentioned called station, second, above-mentioned called station possesses the database of being deposited as EPG by the receivable broadcast program of each reception environment condition that comprises positional information, based on the represented reception environment condition of above-mentioned environmental information that comprises in the above-mentioned EPG solicited message that is received, retrieve the EPG of above-mentioned database, to under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned EPG solicited message, be returned to above-mentioned digital broadcast receiving terminal as selection EPG by receivable broadcast program thus, the 3rd, above-mentioned digital broadcast receiving terminal is selected broadcast program arbitrarily from the above-mentioned selection EPG that foldback is returned, receive selected this broadcast program from above-mentioned digital radio stations.

Like this, shown in the record in above-mentioned the 1st technological means, called station is corresponding with the reception environment conditions such as receiving position of looking the hearer, the selection EPG of the receivable broadcast program of expression is provided, can confirm to look the hearer thus at the receivable broadcast program of current location, the channel selection of desirable broadcast program becomes possibility.In addition for the broadcasting station, owing to can make audiovisual person that the existence of the broadcast service that is provided is provided, thereby can strive for more looking the hearer, in addition for called station, can obtain and to impose and to be accompanied by response from looking the hearer, carry out each strong point of communication line usage charges of the transmission of effective choice EPG from the EPG solicited message of looking the hearer.

Among the present invention, be characterised in that: above-mentioned digital broadcasting is a received terrestrial digital broadcasting.Received terrestrial digital broadcasting is not only home-use HDTV (High-Definition Television) broadcasting, and the new service that sends dedicated broadcast towards vehicle-mounted and portable terminal device is planned, and new business is expected.

The invention effect

As mentioned above,, look the hearer and can hold receiving sensitivity information under the current reception environment, under the occasion that reception environment worsens,, can retrieve the environment that is suitable for receiving by adjusting environment such as antenna direction and receiving position according to digital broacast receiver of the present invention.

Especially, in digital broacast receiver of the present invention, owing to be not to provide diadic but continuous receiving sensitivity parameter, thereby look the hearer based on these parameters, can retrieve the environment that is suitable for receiving effectively.

The received terrestrial digital broadcasting station selector that the present invention relates in addition is by the received terrestrial digital broadcasting platform, called station, the received terrestrial digital broadcasting that can receive from the received terrestrial digital broadcasting platform also can constitute with the received terrestrial digital broadcasting receiving terminal that called station communicates, can be based on the reception environment condition of the current location that comprises expression received terrestrial digital broadcasting receiving terminal etc., the selection EPG that obtains relevant receivable broadcast program (promptly, EPG based on the selection of reception environment condition), thereby as the received terrestrial digital broadcasting receiving terminal, it can be the vehicle mounted portable terminal of shift position, also can be to look the portable terminal devices such as portable phone that the hearer carries, also can be to be fixedly set in the type that the fixedly installs terminal that waits in the building, can select and receive desirable broadcast program by the selection EPG that is received.

Description of drawings

Fig. 1 is the functional block diagram that the mobile telephone of the built-in digital broacast receiver of the present invention of expression constitutes.

Fig. 2 is the functional block diagram that the inside of the ofdm demodulator of expression mobile telephone shown in Figure 1 constitutes.

Fig. 3 is the accompanying drawing of configuration example of the display frame of expression mobile telephone shown in Figure 1.

Fig. 4 is illustrated in mobile telephone shown in Figure 1, from look the hearer select receiving to of digital broadcasting carry out till image shows action and based on the flow chart of the change action of the display frame of the variation of receiving sensitivity.

Fig. 5 is illustrated in the display frame of mobile telephone shown in Figure 1 the accompanying drawing of other display mode of receiving sensitivity information.

Fig. 6 is the accompanying drawing of display frame configuration example of the seat formula receiving system of the built-in digital broacast receiver of the present invention of expression.

Fig. 7 is the accompanying drawing of display frame configuration example of the portable information communication terminal of the built-in digital broacast receiver of the present invention of expression.

Fig. 8 is the pie graph of a kind of mode of expression received terrestrial digital broadcasting service.

Fig. 9 is the pie graph of a kind of mode of expression received terrestrial digital broadcasting service.

Figure 10 is in the digital broacast receiver of expression embodiment of the present invention 4, utilizes TMCC information to measure the concept map of method one example of receiving sensitivity.

Figure 11 is the modulation system of illustration terrestrial digital broadcasting signal and encoding rate and the form of the relation of the required C/N ratio that is used for broadcast reception.

Figure 12 is that concept nature is represented in the digital broacast receiver of embodiment of the present invention 4, the accompanying drawing of the calculating of receiving sensitivity information and the mode of demonstration.

In Figure 13 has been the illustration digital broacast receiver of embodiment of the present invention 4, show the flow chart of the motion flow of receiving sensitivity information.

Figure 14 is the accompanying drawing of configuration example of display frame in the digital broacast receiver of expression embodiment of the present invention 4.

Figure 15 is that concept nature is represented in the digital broacast receiver of embodiment of the present invention 4, corresponding to the receiving sensitivity of digital broadcasting, makes the accompanying drawing of the display mode that the brightness of display part integral body changes.

Figure 16 is the ideograph of the flow process of various signals in the received terrestrial digital broadcasting station selector of representing the present invention relates to.

Figure 17 is the embodiment as the received terrestrial digital broadcasting station selector that the present invention relates to, and to the outdoor location in 4 different places of reception environment condition, the occasion that 4 people that wish the audiovisual terrestrial DTV respectively look the hearer compares shown ideograph.

Figure 18 is expression other embodiment as the received terrestrial digital broadcasting station selector that the present invention relates to, the ideograph of the problem points during broadcasting wave receives in the vehicle mounted terminal.

Figure 19 is expression other embodiment as the received terrestrial digital broadcasting station selector that the present invention relates to, in the demonstration of selecting EPG, represents the ideograph of demonstration example of the Channel icons of receivable broadcasting station.

Figure 20 is expression other embodiment as the received terrestrial digital broadcasting station selector that the present invention relates to, can receive the service inner region of broadcast program and occasion that the service exterior domain that can not receive shows as the broadcast service zone figure of each broadcasting channel under the ideograph of example.

Embodiment

Following with reference to accompanying drawing, describe embodiment of the present invention in detail.As the execution mode of digital broacast receiver of the present invention and station selector, though received terrestrial digital broadcasting is come illustration as object, the present invention is defined in this, need not go into the details, and also can implement in other digital broadcastings such as satellite digital broadcasting in addition.

At first, the digital broadcasting reception technique based on embodiment of the present invention 1 is explained.Digital broacast receiver based on present embodiment is the received terrestrial digital broadcasting receiving system that is built in mobile telephone.Fig. 1 is the functional block diagram of expression based on the configuration example of the received terrestrial digital broadcasting receiving system of present embodiment.

As shown in Figure 1, in mobile telephone based on present embodiment, the terrestrial digital broadcasting signal that is received by the 1st antenna 101 reverts to voice signal and picture signal via tuner 102, ofdm demodulator 103, decoder portion 104, voice signal is via voice signal handling part 115, in loud speaker 117 regeneration, picture signal is imported to picture signal handling part 118, shows on display 119.In addition the portable phone signal of communication that receives from the 2nd antenna 110 by RF handling part 111, comprise the w-CDMA handling part 112 of Base-Band Processing portion 113 and call voice (AD/DA) handling part 114 in loud speaker 117 regeneration.From the voice signal of loudspeaker 116 input along opposite path by from the 2nd antenna transmission.

At above-mentioned mobile telephone, under the occasion of carrying out the internet connection by the portable phone signal of communication, the communication information that comprises in the portable phone signal of communication, shows on display 119 via decoder portion 104 and picture signal handling part 118 from Base-Band Processing portion 113.

Each component part of control part 109 these mobile telephones of control.About the component part beyond above-mentioned, suppose with general received terrestrial digital broadcasting receiving system same.

Fig. 2 is the functional block diagram of formation of the ofdm demodulator 103 of expression mobile telephone shown in Figure 1.Among Fig. 2, in quadrature demodulation portion 201, the broadcast singal that has converted the IF signal to by the tuner 102 of mobile telephone shown in Figure 1 is digitized and is transfused to.The broadcast singal that has been input to quadrature demodulation portion 201 is input to detection section 205 through phasing portion 202, FFT portion 203, frame synchronization portion 204.At detection section 205, detect the parameter of C/N (the Carrier to Noise) ratio of relevant broadcast singal, output to C/N efferent 213.

From TS (Transport Stream) signal of detection section 205 output through overfrequency time de-interweaving portion 206, position deinterleaving portion 207, Veterbi decoding portion 208, byte deinterleaving portion 209, energy dissipation portion 210, TS reproducing unit 211, RS (Reed-Solomon) lsb decoder 212, relevant BER (Bit Error Rate, error rate) parameter is output to the control part 109 of mobile telephone shown in Figure 1 by BER efferent 214, and the TS signal is output to decoder portion 104 by TS efferent 215.

Here, BER also can be set at the value when output has been made as OFF with the RS decoding, and this value satisfies under the occasion of fiducial value, and the RS decoding is made as ON, output TS.In addition, as described later, also can constitute under the occasion that shows reception image and receiving sensitivity at the same time, detect the C/N decoded BER of RS (Reed-Solomon) when, TS also continues to send to decoder portion 104.

About received power, can judge from the value of the not shown AGC (Auto Gain Control) of the output IF of the tuner 102 of the leading portion that has been configured to quadrature demodulation portion 103 from control.It is identical with the formation that comprises in the general ofdm demodulator that each of ofdm demodulator 103 inside shown in Figure 2 in addition constitutes, the detailed description of omitting each component part.

Secondly, in the digital broacast receiver based on present embodiment, the digital broadcasting that expression is received and the technology of receiving sensitivity information are explained.

Fig. 3 (a)～(f) is the accompanying drawing of configuration example of display frame of the mobile telephone of the built-in digital broacast receiver based on present embodiment of expression.Fig. 3 (a) is the accompanying drawing of demonstration example of the menu screen of expression mobile telephone.Show in the example at this, comprise the 1st display part 301 of expression battery allowance, communication sensitivity etc., the 2nd display part 302 of expression menu option.The menu option comprises such as TV, website, mail, address address list and schedule projects.Below, in the 2nd display part 302, selected TV, promptly utilized occasion based on the reception of the received terrestrial digital broadcasting of the digital broacast receiver of present embodiment, be explained with regard to the demonstration example of portable telephone terminal.For other menu option, since identical with the function that comprises in the general mobile telephone, thereby omit explanation.

In the menu screen shown in Fig. 3 (a), select TV, carry out channel selection after, demonstrate the communication broadcast display frame shown in Fig. 3 (b).Communication broadcast display frame comprises the 1st display part 301, broadcasting display part 303 and communication display part 304 and constitutes.Here, demonstrate the information content of the received terrestrial digital broadcasting that is received, demonstrate at communication display part 304 and be appended hereto content correlated information that the information content sends and data broadcasting etc. at broadcasting display part 303.

After " sensitivity " that communication display part 304 is selected to show as option, demonstrate the broadcast reception sensitivity display frame shown in Fig. 3 (c).At receiving sensitivity display part 305, the receiving sensitivity of broadcasting shows in excellent figure mode.Show in the example at this,,, thereby can find out that receiving sensitivity is more than the normal value here then owing to the value that demonstrates more than 100 if just hypothesis is can carry out normal broadcast reception more than 100 such as receiving sensitivity.In addition as receiving sensitivity, can adopt show received power and C/N than in, consider the poorest situation, its value is lower than a side's who receives necessary fiducial value (this value is made as 100%) method.Can certainly have by both are shown, be convenient to find the display mode of the reason of degradation under the receiving sensitivity.

In above-mentioned mobile telephone, because the receiving sensitivity of broadcasting is lower than setting under the occasion that can not normally receive, the display frame when demonstrating can not receive shown in any one of Fig. 3 (d)～(f).In the broadcasting display part 303 in the time can not receiving, replace broadcasted content, " being in outside the service area " (receiving sensitivity 0), " because of noise can not receive " are (C/N=70), " electric wave is crossed weak can not the reception " message such as (received powers 70) is shown based on positional information of being obtained and receiving sensitivity parameter etc.

Because the digital broacast receiver based on present embodiment is built in mobile telephone, thereby has considered by looking the hearer move the receiving sensitivity of broadcasting to be gradually changed.Therefore, the display frame of the display frame of normal Fig. 3 (b) that receives broadcasting or Fig. 3 (c) and Fig. 3 (the d)～Fig. 3 (f) can not receive the time is preferably automaticallyed switch according to the reception situation.

In digital broacast receiver based on present embodiment, as mentioned above, owing to have the formation that broadcasting display part 303 and receiving sensitivity display part 305 are shown separately, thereby have can be under the occasion that reception environment worsens, receiving sensitivity is confirmed at receiving sensitivity display part 305 in the limit, and the direction of antenna and the advantage of receiving position are adjusted in the limit.

Fig. 4 is expression from utilizing the hearer that looks based on the mobile telephone of present embodiment to select receiving to of digital broadcasting to carry out the action till image shows and the flow chart of the motion flow that switches based on the display frame of the variation of receiving sensitivity.Following in addition in the action of mobile telephone side, control by control part shown in Figure 1 109.And it is suitable with reference to Fig. 1, Fig. 2.

At first, on the menu screen shown in Fig. 3 (a), based on the selection operation (step 401) that receives from the TV that looks the hearer, in next picture (not shown), (steps 402) such as selective reception channel, display modes.In mobile telephone, possess under the occasion of position information testing agencies such as GPS or the occasion that receiving position is logined in advance, judge whether broadcasting (step 403) is arranged in the selected channel.After judging receiving position and being in outside the service area, show this fact (step 404).If be in the service area, next, mobile telephone detects from the receiving sensitivity information (aftermentioned) (step 405) of tuner 102 and ofdm demodulator 103 acquisitions.Mobile telephone is next based on this receiving sensitivity information, judge whether current receiving sensitivity satisfies for receiving the necessary stipulated standard value of broadcasting (step 406) of selected channel, determine satisfy fiducial value after, display image (content) (step 407).

In current receiving sensitivity, such as the received power here and C/N than the occasion that does not all satisfy specified reference value, perhaps the value of any one party does not reach under the occasion of fiducial value (step 408,410), shown in the demonstration example during as can not the receiving of Fig. 3 (d)～Fig. 3 (f), demonstrate the fact (step 409,411,412) that can not receive, receiving sensitivity information also shows simultaneously.At this moment, observe receiving sensitivity information but look the hearer limit, limit change antenna direction and receiving position etc. are suitable for the retrieval of broadcast reception.

Also can have in addition in receiving sensitivity is to approach more than the desirable value under the occasion of value of certain desirable value (threshold value), such as the function of the fact of reporting the situation that approaches to receive difficulty particularly.That is, report being predicted by the flicker of picture and demonstration such as " reception will be interrupted " note in advance near the fact of receive interrupting, the user can take some countermeasures in advance thus.Such as, if being unsuitable for the environment of broadcast reception, moves discovery terminal forward, then the user can take to stop to move, and continues certain countermeasures such as audiovisual before finishing watching program.

Next, in the digital broacast receiver based on present embodiment, the method for measuring receiving sensitivity is explained.In the present embodiment, as receiving sensitivity parameter, adopt the C/N ratio of received power and received signal.In Fig. 1, from the control signal to tuner 102 detects received power from ofdm demodulator 103, ofdm demodulator 103 (in the C/N specific output portion 213 shown in Figure 2) detects the C/N ratio of received signal, and it is outputed to control part 109 respectively.Ofdm demodulator 103 outputs to control part 109 with the BER of received signal from the BER efferent of Fig. 2 in addition.

Control part 109 calculates receiving sensitivity information with reference to the benchmark of regulation and based on these information of being imported, outputs to display 119 by picture signal handling part 118.Here, to being used to calculate the benchmark of receiving sensitivity information, there are various display formats.Such as, to each parameter of received power and C/N ratio, the reception fiducial value corresponding with each modulation system that is used to broadcast can be set to 100%, the scaled value that also changes in suitable scope corresponding to its its show value of general amplitude of fluctuation is shown.Like this, can avoid the situation that diadic is in fact only got in the demonstration of each parameter.

In that each parameter of received power and C/N ratio is carried out overall merit, calculate under the occasion of receiving sensitivity information, such as the BER value that also can detect behind the Veterbi decoding, this value is reached threshold value BER=2 * 10 that become undoubtedly like error ^-4The time accepting state as the benchmark of receiving sensitivity 100%.Under the occasion of not utilizing the BER value,, also can utilize the calculating formula that derives in advance to calculate receiving sensitivity to C/N received power when.Perhaps as more easy method, also can select C/N than with received power in a side of worsening condition, should be worth as receiving sensitivity information.

But, in the digital broacast receiver based on present embodiment, the demonstration of receiving sensitivity information is not limited to the display mode example of receiving sensitivity display part 305 shown in Figure 3.Fig. 5 is the accompanying drawing of other display mode of expression receiving sensitivity information.In addition, shown in Figure 5 each shows that example is such as showing in the whole display frame of mobile telephone, such as in the broadcast reception sensitivity display frame shown in the communication broadcast display frame shown in Fig. 3 (b) and Fig. 3 (c) etc., also can or automatically be switched to shown in Figure 5 each and show example by user's operation based on its display frames such as receiving sensitivities.

In the demonstration example 1 shown in Fig. 5 (a), C/N is represented with rod figure respectively than (C/N), received power (Power) and to the receiving sensitivity (Total) that they have carried out overall merit.In the demonstration example 2 shown in this external Fig. 5 (b), only with overall merit receiving sensitivity represent with rod figure.According to these expression modes, look the hearer and can hold current accepting state by continuous parameter, based on these information, can change aerial position and receiving position, retrieve suitable reception environment.

In the demonstration example 3 shown in Fig. 5 (c), received power and C/N ratio are carried out two-dimensional transformations show.Point 502 shown in Fig. 5 (c) is the current reception situation of expression in real time.Like this, look the hearer and can together retrieve suitable reception environment with received power and C/N than the two based on 2 dimension information.

In the demonstration example 4 shown in Fig. 5 (d), represented from the past to current receiving sensitivity along time shaft.Like this, even,, can know the variation figure of receiving sensitivity perhaps in occasion that changes by meteorological condition and its receiving sensitivity of various environmental condition etc. such as the also occasion of life period interdependence in its receiving sensitivity of same receiving position.Perhaps, for the user who comes to work and go to school via same path every day, close position or the history such as receiving sensitivity of time by storing, also situation that can be more current and history in the past.

Though more than represented the demonstration example of the receiving sensitivity information in the digital broacast receiver of present embodiment, but the display packing of receiving sensitivity information in addition, also can wait based on kind, the occupation mode of display terminal, the hobby of looking the hearer to show various figures.According to the digital broacast receiver based on above-mentioned present embodiment, occasion that has worsened at reception environment etc. is looked the hearer and can retrieve the state that is suitable for broadcast reception based on the receiving sensitivity information that shows on picture.Receiving sensitivity information also can be different from upward demonstration of other picture of content display frame (monitoring image of display frame rear side in such as the Foldable portable phone) in addition.Thus, can at first confirm the reception situation, and then show the content that (reception) is actual.

Next, with reference to accompanying drawing, the digital broacast receiver based on embodiment of the present invention 2 is explained.Digital broacast receiver based on present embodiment is a kind of main seat formula received terrestrial digital broadcasting receiving system in indoor use.In addition, though in the mode of display frame, have feature based on the digital broacast receiver of present embodiment, other formation (comprise inner constitute) and action and much at one based on the digital broacast receiver of execution mode 1.

Fig. 6 is the accompanying drawing of expression based on the display frame configuration example of the digital broacast receiver of present embodiment.Digital broacast receiver shown in Figure 6 has image displaying part 601, antenna 602, loud speaker 603.

The broadcast reception shown in Fig. 6 (a) may the time, demonstrate the image that is received, the broadcast reception shown in Fig. 6 (b) can not the time, demonstrate receiving sensitivity information.Receiving sensitivity information representation shown in Fig. 6 (b) is based on the example of the demonstration example 1 of Fig. 5 (a), but also can carry out the demonstration under the display mode shown in Fig. 5 (b)～Fig. 5 (d), perhaps, also can take in addition the display mode of (such as Fig. 3).Because the occasion that display frame is big is more, thereby the part of picture is shown.Demonstration at Fig. 6 (a) becomes under impossible occasion, and a part is shown.In addition, other display frame (little monitoring image) is shown.

In addition, the switching of the picture shown in the picture shown in Fig. 6 (a) and Fig. 6 (b) can be automaticallyed switch by receiving sensitivity, perhaps also can be switched by the operation of looking the hearer.

According to digital broacast receiver with above feature, desiring under the occasion of indoor configuration receiving system, can retrieve the position that is provided with that is suitable for receiving based on receiving sensitivity information.Such as, the enough but C/N of received power than low occasion under, can move to place and the periphery thereof that has left the home appliance that becomes the reason that noise takes place with the position is set, there is not the good place of barrier and intervisibility, under the low occasion of received power, can will the place that the position moves to window and can receive reflected wave standing wave etc. be set.

Next, with reference to accompanying drawing, the digital broacast receiver based on embodiment of the present invention 3 is explained.Digital broacast receiver based on present embodiment is a kind of received terrestrial digital broadcasting receiving system that is built in portable information communication terminal (PDA etc.).In addition, though in the mode of display frame, have feature based on the digital broacast receiver of present embodiment, other formation and action and much at one based on the digital broacast receiver of execution mode 1.

Fig. 7 is expression based on the accompanying drawing of the configuration example of the display frame of the digital broacast receiver of present embodiment (such as the small, dedicated machine etc.).Digital broacast receiver has broadcasting display part 701, communication display part 702, receiving sensitivity show bar 703 and operating portion 704, and its inner formation constitutes much at one with Figure 1 and Figure 2.In the present embodiment, also same with above-mentioned execution mode 1, under the occasion that reception environment has worsened, look the hearer can be based on the receiving sensitivity information that shows on the picture, and retrieval is suitable for the state of broadcast reception.

Next, with reference to accompanying drawing, the digital broacast receiver based on embodiment of the present invention 4 is explained.Digital broacast receiver based on present embodiment is characterised in that: possess the formation based on any one of the digital broacast receiver of above-mentioned execution mode 1～execution mode 3, TMCC (Transmission and Multiplexing Configuration Control: the transmit composite signals) information that also possesses the information of obtaining the TS (transport stream) that comprised relevant each broadcasting channel and load mode is simultaneously used it for the unit of the mensuration of broadcast reception sensitivity.

Figure 10 is in the digital broacast receiver of expression based on present embodiment, utilizes TMCC information to measure the concept map of method one example of receiving sensitivity.

In Figure 10, terrestrial digital broadcasting signal is received by the 1st antenna 1001, receives processing at leading section 1003, and the portable phone signal is received by the 2nd antenna 1002, receives processing at RF handling part 1004.Here, leading section 1003 is handling parts of functions such as the necessary tuner of reception that possessed terrestrial digital broadcasting signal, demodulator, decoder, has the formation identical in fact with formation shown in Figure 1.

Because TMCC information is sent by compound in received terrestrial digital broadcasting usually, thereby leading section 1003 is extracted TMCC information 1006 out from the terrestrial digital broadcasting signal that is received.Deriving the necessary required received power of reception of each broadcast program and required C/N based on the digital broacast receiver of present embodiment from this TMCC information 1006 compares etc.

Above-mentioned required received power and required C/N are than by deciding such as the modulation system of terrestrial digital broadcasting signal and encoding rate etc.Figure 11 is expression this modulation system, encoding rate and the demonstration example of the relation of required C/N ratio.Can find out that when modulation system is 16QAM, encoding rate is with reference to demonstration shown in Figure 11 at 1/2 o'clock, required C/N is than being 11.5[dB], when modulation system is QPSK, encoding rate is 2/3 o'clock, required C/N is than being 6.6[dB].

From the required received power that derives by TMCC information 1006 and required C/N receiving sensitivity parameter 1005, utilize the receiving sensitivity calculating formula 1008 actual receiving sensitivities of calculating based on the digital broacast receiver of present embodiment than, practical measurement.

In the receiving sensitivity calculating part 1008 shown in Figure 10, the formula that expression is used to calculate.Here, x detects received power, and x1 is required received power, and y detects the C/N ratio, and y1 is required C/N ratio, utilizes these parameters, received power evaluation function f (x, x1) and C/N evaluation function g (y, y1) represent by following formula:

[formula 7]

f(x，x1)：

(1)x＜a

f(x，x1)＝0

(2)a≤x≤b

$f(x,x1)=\frac{x-a}{x1-a}\&times;100$

(3)b＜x

$f(x,x1)=\frac{b-a}{x1-a}\&times;100$

[formula 8]

g(y，y1)：

(1)y＜c

g(y，y1)＝0

(2)c≤y≤d

$g(y,y1)=\frac{y-c}{y1-c}\&times;100$

(3)d＜y

$g(y,y1)=\frac{d-c}{y1-c}\&times;100$

But a and b are the lower limit of regulation received power sensitivity and the constant of the upper limit, and c and d are the lower limit of regulation C/N specific sensitivity and the constant of the upper limit.Receiving sensitivity calculating formula 1008 be take received power evaluation function f (x, x1) and C/N evaluation function g (y, a less side's formula in value y1) can be with its result of calculation as comprehensive receiving sensitivity Y.

Such as, under the occasion of the 1seg broadcast program that receives 16QAM, encoding rate 1/2, state received power evaluation function f (x asking to count in, x1) and C/N evaluation function g (y, y1) in the formula, if utilize required received power x1=-86[dBm], required C/N is than y1=11.5[dB], a=-100[dBm], b=-70[dBm], c=5[dB], d=15[dB] value, suppose this moment detected receiving sensitivity parameter value be x=-83[dBm], y=6[dB], then can obtain following result of calculation:

f(x＝-80，x1＝-86)＝121[％]、g(y＝6，y1＝11.5)＝15[％]、

Y＝Min(f，g)＝g＝15[％]

Therefore, as the receiving sensitivity information of this moment, demonstrating overall sensitivity is 15[%].Under this external and above-mentioned same condition, be x=-90[dBm if suppose detected receiving sensitivity parameter value], y=10[dB], then can obtain following result of calculation:

f(x＝-90，x1＝-86)＝71[％]、g(y＝10，y1＝11.5)＝77[％]、

Y＝Min(f，g)＝f＝71[％]

Therefore, as the receiving sensitivity information of this moment, demonstrating overall sensitivity information is 71[%].In above-mentioned example, though the value of overall sensitivity Y is represented as receiving sensitivity information, if but with its replacement, perhaps meanwhile, as received power sensitivity and C/N sensitivity g, represent respectively received power evaluation function f (x, x1) and C/N evaluation function g (y, y1) value is then also effective.

Among this external Figure 10, also can in receiving sensitivity parameter 1005, adopt the value of detected Veterbi decoding output BER when digital broadcasting receives, decide receiving sensitivity information.Specifically, calculate detected BER is being made as z, the function h that is expressed from the next when required BER is made as z1 (z, z1):

[formula 9]

h(z，z1)：

(1)z＞10exp(-k)

h(z，z1)＝0

(2)10exp(-k)≥z≥10exp(-l)

$h(z,z1)=\frac{\left|\log z\right|-k}{\left|\log \mathrm{<figure-callout\; id="1"\; label="z"\; filenames="C03158462.400591.png"\; state="\{\{state\}\}">z</figure-callout>}1\right|-k}\&times;100$

(3)10exp(-l)＞z

$h(z,z1)=\frac{l-k}{\left|\log \mathrm{<figure-callout\; id="1"\; label="z"\; filenames="C03158462.400591.png"\; state="\{\{state\}\}">z</figure-callout>}1\right|-k}\&times;100$

But k and l (sound of sighing that) are the constants of the regulation BER lower sensitivity limit and the upper limit.

Such as, be z1=2 * 10e if suppose required BER ^-4, each constant is defined as k=2, l=5, detected BER value is z=1 * 10e when digital broadcasting receives ^-3, then function h (z, result of calculation z1) is as follows:

h(z＝1×10e ^-3，z1＝2×10e ^-4)＝59[％]

Therefore, the receiving sensitivity information as this moment demonstrates 59[%].

Figure 12 is the accompanying drawing that concept nature is represented the mode of the calculating of above-mentioned receiving sensitivity information and demonstration.In the digital broacast receiver based on present embodiment, it is characterized in that: as shown in figure 12, come lower limit, fiducial value and the higher limit of regulation receiving sensitivity parameter based on TMCC information, detected receiving sensitivity parameter and its setting are compared, visually be familiar with receiving sensitivity information at receiving sensitivity display part 1201 thus, this point can show by being easy to mode.

Among Figure 12, make from lower limit, fiducial value and the higher limit of the receiving sensitivity parameter of TMCC information specifies correspondingly with receiving sensitivity 0%, receiving sensitivity 100% and receiving sensitivity 120% respectively, but the side of taking of the yardstick of relevant these corresponding relations technically can be in suitable scope sets arbitrarily.Above-mentioned in addition each calculating formula is to have adopted an example of linear function and logarithmic function, if showing, a kind of relevant sensitivity carries out the setting of the upper limit, lower limit, computational methods with the receiving sensitivity and the fiducial value (desirable value: receive necessary minimum) of reality are carried out relative evaluation then also can adopt other various calculating formulas.In addition, also have a kind of shown in Figure 10ly,, obtain the method for TMCC information 1006 by RF handling part 1004 and via communication line (common wire road network etc.).This is effectively as can not obtain replacement method under the TMCC information occasion from broadcast wave not only, and also is effective obtaining on the meaning of other broadcast message.

Under this external this occasion,, the broadcast service information corresponding with the current location of digital broacast receiver can be provided to the user by also possessing broadcast information position information acquiring section 1007.Like this, can provide more detailed receiving sensitivity information according to based on the result of calculation of receiving sensitivity calculating formula 1008 with from the position and the information 1009 that relatively obtains of broadcasting service area.

In Figure 13 has been an illustration the digital broacast receiver based on present embodiment, the flow chart of the motion flow of expression receiving sensitivity information.As shown in figure 13, after having selected TV by the TV selection operation (step 1301), next select the channel (step 1302) of institute's audiovisual based on the digital broacast receiver of present embodiment for the digital broadcasting that receives the user.Can judgement receive the broadcasting (step 1303) of selected channel.

Can carry out showing this channel at display part under the occasion of broadcast reception.Accompany therewith in addition, obtain TMCC information, detect receiving sensitivity parameter (step 1304) from the digital broadcasting received signal.At any time calculate receiving sensitivity information (step 1305) from these data, show (step 1306) at the receiving sensitivity display part.

On the other hand, can not carry out under the occasion of broadcast reception, can detect the current location of digital broacast receiver by the GPS function, perhaps according to the input (step 1307) of the current location of relevant digital broacast receiver based on the user, notify called station (step 1308) with current location, obtain broadcast related information (comprising TMCC information) (step 1309) in the digital broacast receiver current location via communication line thus.

Then, based on the broadcast related information of digital broacast receiver from obtaining of present embodiment, judge whether digital broacast receiver enters in the broadcasting service area of the channel that step 1302 is selected by the user (step 1310) in step 1309.Under the occasion in digital broacast receiver is not in the broadcasting service area of this channel, the fact that will not broadcast in this position shows (step 1311) at display part or receiving sensitivity display part.

Under the occasion of digital broacast receiver in being in the broadcasting service area of this channel, enter step 1304, obtain the TMCC information that in the above-mentioned broadcast related information of obtaining, comprises, detect receiving sensitivity parameter (step 1304).Can calculate receiving sensitivity information (step 1305) at any time from these data, show (step 1306) at the receiving sensitivity display part.At this moment, under occasion, can show this fact, also can only utilize detectable parameter to calculate receiving sensitivity with the parameter that can not detect as receiving sensitivity parameter.

In addition, received broadcasting being in to deenergize, but under the occasion of the state that can not receive now, also the TMCC information in past can be recorded memory, as being used to utilize this information to carry out the criterion of zone change etc.

Figure 14 is the accompanying drawing of expression based on the configuration example of display frame in the digital broacast receiver of present embodiment.Display frame shown in Figure 14 comprises display part 1401 such as battery allowance communication sensitivity, broadcasting display part 1402, receiving sensitivity display part 1403 and constitutes.

Display parts 1401 such as battery allowance communication sensitivity are the zones that shows battery allowance and communication sensitivity, broadcasting display part 1402 is the zones that show the digital broadcast images that is received, receiving sensitivity display part 1403 is except expression receiving sensitivity information, also can be used for data broadcasting and the communication zone with the demonstration of content.

Shown in Figure 14 (a) and (b), at digital broacast receiver based on present embodiment, in occasion (Figure 14 (a)) that can not receiving digital broadcast, do not carry out any demonstration at broadcasting display part 1402, only show the receiving sensitivity information at receiving sensitivity display part 1403.This demonstration is effectively to the economize on electricityization in the self-emitting display, and is especially effective under the occasion that display part is made of OLED display.Under receivable occasion, shown in Figure 14 (b), at broadcasting display part 1402 display images, receiving sensitivity display part 1403 shows receiving sensitivity information.Under this occasion, also can a display image.

On the other hand, in display part, adopted under the occasion of LCD, owing to adopt comprehensive light emitting-type back of the body lamp or headlight usually, even thereby only want to show certain zone in the picture, its result also will be that whole image all has rayed, thereby in the display packing shown in Figure 14 (a), do not have the effect of low power consumptionization.Therefore, also considered display packing economize on electricity by following explanation.

Figure 15 is that concept nature is represented the accompanying drawing based on other display mode in the digital broacast receiver of present embodiment.This method changes the brightness of display part integral body according to the receiving sensitivity of digital broadcasting.

Specifically, under can not the state of receiving digital broadcast,, calculate receiving sensitivity, show display part with corresponding therewith brightness by said method by the TMCC information that obtains via communication line etc. etc.Such as, receiving sensitivity near 0% state under, become almost completely dark display frame, brighten along with the rising of receiving sensitivity.Also can reach under the receivable time point in addition, at the display part display of broadcast in digital broadcasting.Can make brightness reach to stablize this moment shows.

By adopting said method, even the receiving sensitivity display part is not set specially, be associated with receiving sensitivity by the brightness that makes picture, also can report receiving sensitivity.In addition, for visually directly showing the receiving sensitivity this point to the user, the corresponding method of tone variations that makes with receiving sensitivity is also applicable.In addition, above-mentioned each display packing has been not limited to adopt the liquid crystal indicator of liquid crystal cell, and is also applicable to the display unit that has adopted various display elements.

More than, each execution mode of digital broacast receiver of the present invention is described, but the present invention is defined in these execution modes, can increase various changes in the scope that does not break away from main idea of the present invention.

Next, the received terrestrial digital broadcasting station selector based on embodiment of the present invention 5 is explained.Figure 16 is the ideograph of expression based on the flow process of various signals in the received terrestrial digital broadcasting station selector of embodiment of the present invention.Though being received terrestrial digital broadcasting, the broadcast receiving apparatus 1601 here receives corresponding portable phone, but be not to be defined in received terrestrial digital broadcasting especially to receive corresponding portable phone, if can receive received terrestrial digital broadcasting, and be equipped with the device of communication function, then vehicle mounted terminal and PDA, mobile PC, desktop PC, general seat formula TV also can become its object.

At first, attempt to obtain the communication function that the user who broadcasts EPG and audiovisual broadcast utilizes terminal, the EPG request that has added the positional information of oneself is sent (1607) to called station.At this moment, though also consider the method that own positional information directly import from the GUI (Graphical User Interface) of display frame, automatic transmission is from the method simple and feasible of the positional information of GPS (Global PositioningGuide) acquisition that is equipped on terminal.Next, the called station 1606 that has received the EPG request by base station 1604, order wire road network (or internet) 1605 is from the database of forming by the service area diagram corresponding with existing environment 1611 and with the corresponding EPG1610 of environment 1612, with the positional information that received and terminal machine information 1613 is origin (retrieval) 1616 of classifying, the EPG1614 (or service area diagram) that adapts to most with above-mentioned terminal is thought in extraction, by the path opposite with above-mentioned path to terminal foldback EPG1614 (or service area diagram) (1608).In addition, above-mentioned database can make from the receiving sensitivity information of site test, simulation or each receiving terminal collection BER etc.Though the mode of carrying out the EPG delivery service with called station here is that example is illustrated in addition, other is served dealer and broadcasting station and carries out service manner by communication and also be included in the present embodiment.

At last, the user confirms directly desired program to be carried out channel selection by the EPG of foldback from its EPG picture on terminal.Such as, at the beginning of receiving EPG, just can notice on the customer location at terrain point, can not receive because of the influence of barrier from the program A of nearby electric wave tower 1602 broadcasting, but the receivable fact of program B that electric wave tower 1603 is from afar broadcasted.

In addition, " corresponding to environment " term of record comprises the meaning corresponding to the latitude longitude information at terminal place in the symbol 1610,1611, if wish in addition to obtain more accurate EPG, then also comprise the meaning of the information of the information that has increased relevant height and translational speed, moving direction.Even this is because be in same place, also have different with the corresponding situation that receives of this external environment condition (external variable).Even this is also because such as in the occasion from same electric wave tower dispensing broadcast wave, under the occasion of the different multiple broadcasting of its modulation system and anti-error of providing and delivering, could be also different according to its reception of reception environment.

Next, the received terrestrial digital broadcasting station selector based on embodiment of the present invention 6 is explained.Figure 17 is explained the received terrestrial digital broadcasting station selector based on the present embodiment of having imagined various reception environments.Here, to wish that outdoor 4 people of audiovisual terrestrial DTV are that focus compares.This 4 people is near the good locational hearer of the looking A (1705) of electric wave tower A (1701) and intervisibility, is positioned at the looking hearer C (1707), be in from electric wave tower A far of vehicle mounted TV of looking hearer B (1706), using car in building street 1703, looks hearer D (1708) from electric wave tower B (1702) park 1704 also far away.

Hypothesis is looked hearer A, B in addition, D uses and can carry out the portable phone that ground digital receives.Look hearer A (1705) and can all receive, in the EPG1709 that looks hearer A, demonstrate and to receive these all 5 channels from 1 section broadcasting of electric wave tower A (1701) dispensing.

On the other hand, in being in the EPG1710 that looks hearer B (1706) in building street, only demonstrate less but 2 channels (2,9) that anti-error is strong of amount of information.Suppose that the strong broadcast service of this patience for the hearer that looks who is in the abominable street of reception situation, is the higher broadcasted content of convenience or necessity, or be merely the less broadcasted content of amount of information.

In addition, be among the EPG1712 that looks hearer D (1708) in park, countryside, though also can receive broadcast wave from the good electric wave tower B (1702) of intervisibility, some can not receive in the broadcasting from the abominable electric wave tower A (1701) of intervisibility.Broadcast reception in the relevant park, the known general easy weather condition that exists with ....This is because such as after being moistened by rain when leaf, just produces the effect that hinders electric wave.In addition, because humidity and wind speed, accepting state also can change, and the EPG that is adapted to is different.Therefore, be preferably in called station,, it used as one of environmental variance from obtain the weather information in this place by the location information of terminals of obtaining such as the internet.Preferably put down in writing as the weather information 1615 that in Figure 16, has linked with positional information.This external called station side also is necessary to prepare EPG corresponding to weather condition as environmental variance.

In addition, in car, carry out among the EPG1711 that looks hearer C of audiovisual, show that some can not receive in the broadcasting of electric wave tower A (1701), but can receive the transport information of 3 sections broadcasting (or 12,13 sections broadcasting) again.Like this, because EPG is also different because of the performance of receiving terminal, thereby terminal preferably only do not send positional information, also sends machine information.For this reason, the called station side also is necessary to prepare EPG corresponding to the terminal machine as environmental variance.

In addition, receive in (reception in car, the electric car (the Shinkansen etc.)) in the vehicle mounted terminal, direction of advance and speed also become a problem, also produce a related problem of state that moves with the leap service area.Such as, as shown in figure 18, take and look hearer 1803 along towards 1. (1804) occasion of advancing of the direction of electric wave tower A (1801) along the vehicle of highway walking, and along under the direction occasion that 2. advance (1805) of electric wave tower B (1802), even obtained EPG in same place, the content of being obtained also might be different fully because of direction of advance.Such as, under direction of advance occasion 1., though but the possibility that receives from the broadcasting no problem of electric wave tower B is higher, and also higher from the possibility that the broadcasting of electric wave tower A almost can not receive.Under direction occasion 2., possibility in contrast is higher.Therefore, under the occasion of the system of constructing the more accurate EPG of dispensing, be not only the position of receiving terminal, it is better that the information of relevant height and translational speed, moving direction also is used as the system that environmental variance takes into account.

Like this, even in same region, its environment also has very big difference on the part, and receivable broadcast program also has difference.By adopting received terrestrial digital broadcasting station selector, can obtain more accurate EPG based on present embodiment.

Next, the received terrestrial digital broadcasting station selector based on embodiment of the present invention 7 is explained.Though considered variety of way in the display mode of EPG, the mode that generally approaches the TV column of newspaper is widely known by the people.Yet because portable less with its display sizes in the portable terminals such as terminal equipment, but the display message amount is limited, thereby the mode of channel name shown in Figure 17 (1709～1712) and broadcast program thereof put down in writing compactly is better.Under this occasion, owing to selected just can receive broadcasting behind the channel name, thereby after having selected broadcast program, the reading of the detailed program introduction that provides from the information server that is connected by the internet just becomes the application examples that may wait and also exists.

On the other hand, in miniscope, can only demonstrate receivable broadcasting station list, or as shown in figure 19, show as Channel icons 1902 being different from other zone that receives image 1901 as EPG.In addition, as mentioned above, the EPG acquiring unit also can be that the unit of the EPG of this each region of providing and delivering is considered in a kind of region that will have the scope to a certain degree under the receiving terminal merely as least unit.This unit also is being real aspect required manpower of making of EPG and the cost, and if to make it have locality (can not receive at this road periphery, perhaps only can receive the locality of this class degree in this park) then very effective.

Next, the received terrestrial digital broadcasting station selector based on embodiment of the present invention 8 is explained.Figure 20 is that expression replaces broadcasting EPG shown in Figure 17, has shown the accompanying drawing of the example of broadcast service zone figure.Near demonstration on the picture has been configured to current location 2001 picture central authorities peripheral map, expression service area 2003 and service outskirt 2002.The bottom of this external display frame is provided with Channel icons 2004, by the operation of Channel icons 2004 being selected determine, can demonstrate the coverage figure of the channel of wishing audiovisual.

Like this, can know,, move the information of ability audiovisual to where if can not receive about whether being in the place that can receive the channel of oneself wishing audiovisual.

Such as, Figure 20 (a) is the example of the broadcast service zone figure of expression channel 4, therefrom can find out, the user is in the street at this moment, is that service area is outer 2002 around it, can not receive broadcasting, just enter in the service area 2003 after leaving crosspoint 2003 a little, can receive broadcasting.Shown in Figure 20 (b), the broadcast service zone figure that observes channel 1 can find out, as to right lateral, just enter in the service area (hatched area), can receive.

The making of detailed coverage figure that comprises local place is considered to existing problems aspect manpower and cost.For this reason, figure is corresponding with the detailed environmental information of receiving terminal with its broadcast service zone, it would be better to the least unit as piece in the scope is to a certain degree considered, this least unit piece is made up, and constitutes general broadcast service zone figure.

Under the occasion that has adopted this broadcast service zone figure, has following strong point: though be in partly in the zone of carrying out broadcast service really although also exist, yet in fact but be in the occasion of state that can not program receiving, but can be that the fact that a kind of need change the higher situation of the just receivable possibility of reception environment is a little notified and looked the hearer this situation.Have in addition under the occasion outside being in the broadcasting service area, can report the relevant reception broadcasting that is simply, but move the effect that how much just can enter the information of audio-visual space to certain direction from the place at current place.In addition, in " successive value or the Stage Value more than 3 stages ", also comprise the occasion of expression actual numerical value (such as 50 etc.).

Utilizability on the industry

Digital broacast receiver of the present invention can be used as be built in car-mounted terminal or portable phone and The mobile model Digital Broadcasting Receiver dress of the portable terminal devices such as PDA (Personal Digital Assistants) Put, perhaps use as general seat formula receiving system. In addition relevant suitable by expression of the present invention Order is controlled the control circuit of broadcast receiver and is associated with control circuit, and order of representation is posted Deposit the software of medium or the hardware of processing along order of representation, also belong to model of the present invention The farmland.

Claims (51)

1. digital broacast receiver is characterized in that having:

Detecting unit, it detects the receiving sensitivity of digital broadcasting;

Display unit, it shows above-mentioned receiving sensitivity by successive value or the Stage Value more than 3 stages; With

Converting unit, it is converted to successive value or Stage Value 3 stages more than with tuner or the detected receiving sensitivity parameter of demodulation section with above-mentioned receiving sensitivity based on being received by digital broadcasting.

2. the digital broacast receiver of claim 1 record is characterized in that:

Above-mentioned digital broadcasting is a received terrestrial digital broadcasting.

3. the digital broacast receiver of claim 1 record is characterized in that:

Above-mentioned receiving sensitivity parameter comprises at least 1 in received power, carrier wave/noise ratio, the error code rate.

In the claim 3 record digital broacast receiver, it is characterized in that:

Above-mentioned receiving sensitivity comprises 2 kinds of receiving sensitivities that recently calculate separately respectively based on above-mentioned received power and carrier wave/noise at least.

In the claim 3 record digital broacast receiver, it is characterized in that:

Above-mentioned receiving sensitivity only is used for above-mentioned received power and the low side's of carrier wave/noise ratio medium sensitivity essence value to calculate as parameter.

In the claim 3 record digital broacast receiver, it is characterized in that:

Above-mentioned receiving sensitivity is calculated based on the error rate.

7. the digital broacast receiver of arbitrary claim record in the claim 2 to 6 is characterized in that:

Receiving sensitivity is calculated in transmission and multiplexing configuration control information based on the transfer mode of above-mentioned receiving sensitivity parameter and relevant broadcast wave.

In the claim 7 record digital broacast receiver, it is characterized in that:

Based on above-mentioned transmission and multiplexing configuration control information, the desirable value of the necessary receiving sensitivity parameter of reception of decision digital broadcasting by relatively this desirable value and above-mentioned receiving sensitivity parameter, determines receiving sensitivity information.

In the claim 8 record digital broacast receiver, it is characterized in that:

Decide required received power and wanted carrier/noise ratio from above-mentioned transmission and multiplexing configuration control information as the desirable value of above-mentioned receiving sensitivity parameter, by received power and the above-mentioned carrier wave/noise ratio that relatively is detected as above-mentioned receiving sensitivity parameter, the decision receiving sensitivity.

In the claim 7 record digital broacast receiver, it is characterized in that:

Also possess the communication unit of communicating by letter that carries out with the PERCOM peripheral communication platform is arranged, can obtain above-mentioned transmission and multiplexing configuration control information by above-mentioned communication unit.

11. the digital broacast receiver of record in the claim 5 is characterized in that:

Utilize

The received power evaluation function f that represents with the received power x that is detected as above-mentioned receiving sensitivity parameter and above-mentioned required received power x1 (x, x1);

Carrier wave/noise rating function the g that represents with carrier wave/noise ratio y of being detected as above-mentioned receiving sensitivity parameter and above-mentioned wanted carrier/noise ratio y1 (y, y1)

Calculate each evaluation of estimate,

With the value of a less side in each above-mentioned evaluation of estimate as receiving sensitivity Y.

12. the digital broacast receiver of record in the claim 11 is characterized in that:

Above-mentioned received power evaluation function f (x, x1) and above-mentioned carrier wave/noise rating function g (y y1) is defined by following formula 1,2 respectively:

[formula 1]

f(x，x1)：

(1)x＜a

f(x，x1)＝0

(2)a≤x≤b

$f(x,x1)=\frac{x-a}{x1-a}\&times;100$

(3)b＜x

$f(x,x1)=\frac{b-a}{x1-a}\&times;100$

[formula 2]

g(y，y1)：

(1)y＜c

g(y，y1)＝0

(2)c≤y≤d

$g(y,y1)=\frac{y-c}{y1-c}\&times;100$

(3)d＜y

$g(y,y1)=\frac{d-c}{y1-c}\&times;100$

Wherein, a and b are the lower limit of regulation received power sensitivity and the constant of the upper limit, and c and d are the regulation carrier wave/lower limit of noise ratio sensitivity and the constant of the upper limit.

13. the digital broacast receiver of record in the claim 12 is characterized in that:

Above-mentioned received power evaluation function f (x, x1) and above-mentioned carrier wave/noise rating function g (y, y1) in, constant x1, y1, a, b, c and d by the transmission and multiplexing configuration control information decide.

14. the digital broacast receiver of arbitrary claim record in the claim 11 to 13 is characterized in that:

Also with above-mentioned received power evaluation function f (x, x1) and above-mentioned carrier wave/noise rating function g (y y1) shows separately as above-mentioned receiving sensitivity.

15. the digital broacast receiver of record in the claim 6 is characterized in that:

Above-mentioned digital broacast receiver

Compare by desirable value and above-mentioned detected ber value, decide above-mentioned receiving sensitivity information the necessary error rate of digital broadcast reception.

16. the digital broacast receiver of record in the claim 15 is characterized in that:

Above-mentioned digital broacast receiver

The above-mentioned detected error rate is being made as z, when the above-mentioned required error rate is made as z1, the function h that utilization is represented by following formula 3 (z z1) calculates evaluation of estimate, and utilizes it to decide above-mentioned receiving sensitivity information:

[formula 3]

h(z，z1)：

(1)z＜10exp(-k)

h(z，z1)＝0

(2)10exp(-k)≤z≤10exp(-l)

$h(z,z1)=\frac{\left|\log z\right|-k}{\left|\log z1\right|-k}\&times;100$

(3)10exp(-l)＜z

$h(z,z1)=\frac{l-k}{\left|\log z1\right|-k}\&times;100$

Wherein, k and l are the constants of the regulation error rate lower sensitivity limit and the upper limit.

17. the digital broacast receiver of record in claim 15 or 16 is characterized in that:

The above-mentioned error rate is detected Veterbi decoding output error rate by the reception of digital broadcasting, and the above-mentioned required error rate is z1=2 * 10 ^-4

18. the digital broacast receiver of record in claim 4 or 14 is characterized in that:

Above-mentioned receiving sensitivity shows as the 2 dimension curve figure that with above-mentioned received power and above-mentioned carrier wave/noise ratio are 2.

19. the digital broacast receiver of arbitrary claim record in the claim 1 to 6 is characterized in that:

Above-mentioned receiving sensitivity is as having represented that along time shaft at least one the curve chart in above-mentioned received power, the when above-mentioned error rate of above-mentioned carrier wave/noise shows.

20. the digital broacast receiver of arbitrary claim record in the claim 1 to 6 is characterized in that:

Above-mentioned receiving sensitivity demonstrates picture in the time of can not receiving after being lower than the necessary value of broadcast reception automatically.

21. the digital broacast receiver of record in the claim 20 is characterized in that:

Picture is represented the reason that can not receive during above-mentioned can not the reception.

22. the digital broacast receiver of record in the claim 21 is characterized in that:

Above-mentionedly can not receive the note that picture is represented relevant reception situation.

23. the digital broacast receiver of record in the claim 20 is characterized in that:

Picture when above-mentioned can not the reception shows above-mentioned receiving sensitivity.

24. the digital broacast receiver of arbitrary claim record in the claim 1 to 6 is characterized in that:

At above-mentioned display unit, the image display area of digital broadcasting and the viewing area of above-mentioned receiving sensitivity are separated.

25. the digital broacast receiver of arbitrary claim record is characterized in that: have in the claim 1 to 6

When digital broadcasting receives, report the unit that above-mentioned receiving sensitivity approaches the fact of the necessary threshold value of broadcast reception.

26. the digital broacast receiver of arbitrary claim record in the claim 1 to 6 is characterized in that:

After above-mentioned receiving sensitivity is lower than the necessary threshold value of broadcast reception, make luminous the stopping in the viewing area that receives image.

27. the digital broacast receiver of arbitrary claim record in the claim 1 to 6 is characterized in that:

After above-mentioned receiving sensitivity is lower than the necessary threshold value of broadcast reception,, the brightness that receives in the image display area is reduced according to the difference of above-mentioned threshold value and above-mentioned receiving sensitivity.

28. the digital broacast receiver of record in the claim 1, its feature also is:

Storage is by the storage part of above-mentioned detecting unit detected the 1st receiving sensitivity last time,

The control that above-mentioned the 1st receiving sensitivity and this detected the 2nd receiving sensitivity are together shown.

29. a mobile telephone, it possesses a digital broacast receiver, and described digital broacast receiver has: detecting unit, and it detects the receiving sensitivity of digital broadcasting; Display unit, it shows above-mentioned receiving sensitivity by successive value or the Stage Value more than 3 stages; And converting unit, it is converted to successive value or Stage Value 3 stages more than with tuner or the detected receiving sensitivity parameter of demodulation section with above-mentioned receiving sensitivity based on being received by digital broadcasting.

30. a seat formula digital broadcast images receiver, it possesses a digital broacast receiver; Described digital broacast receiver has: detecting unit, and it detects the receiving sensitivity of digital broadcasting; Display unit, it shows above-mentioned receiving sensitivity by successive value or the Stage Value more than 3 stages; And converting unit, it is converted to successive value or Stage Value 3 stages more than with tuner or the detected receiving sensitivity parameter of demodulation section with above-mentioned receiving sensitivity based on being received by digital broadcasting.

31. a portable information communication terminal, it possesses a digital broacast receiver, and described digital broacast receiver has: detecting unit, and it detects the receiving sensitivity of digital broadcasting; Display unit, it shows above-mentioned receiving sensitivity by successive value or the Stage Value more than 3 stages; And converting unit, it is converted to successive value or Stage Value 3 stages more than with tuner or the detected receiving sensitivity parameter of demodulation section with above-mentioned receiving sensitivity based on being received by digital broadcasting.

31. digital broadcast station selector, its by digital radio stations of playing digital broadcasting, communicate called station that circuit connects, can carry out with this called station between communicate by letter, and the digital broadcast receiving terminal that can receive from the broadcasting of above-mentioned digital radio stations constitutes, and it is characterized in that:

Above-mentioned digital broadcast receiving terminal will comprise that the electric program guide solicited message that environmental information, the required list of the positional information that contains the current location of representing this digital broadcast receiving terminal are shown in the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the reception environment condition shown in this environmental information sends to above-mentioned called station

Above-mentioned called station possesses the database of being deposited as electric program guide by the receivable broadcast program of each environmental condition that comprises positional information; Based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that receives; Retrieve the electric program guide of above-mentioned database; To under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message, be returned to above-mentioned digital broadcast receiving terminal as the selection electric program guide by receivable broadcast program thus

Above-mentioned digital broadcast receiving terminal can be selected broadcast program arbitrarily from the above-mentioned selection electric program guide by above-mentioned called station foldback, and receives selected this broadcast program from above-mentioned digital radio stations.

33. the digital broadcast station selector of record in the claim 32 is characterized in that:

Above-mentioned digital broadcast receiving terminal possesses the global positioning system processing unit that can obtain from the positional information of GPS satellite.

34. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

Send in the above-mentioned positional information that above-mentioned environmental information comprised of above-mentioned electric program guide solicited message of above-mentioned called station at above-mentioned digital broadcast receiving terminal, except the latitude longitude information at this digital broadcast receiving terminal place, also comprise the information of any one at least about height and translational speed and moving direction.

35. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

Above-mentioned called station is when detecting the electric program guide of above-mentioned database, can be used as the above-mentioned environmental information of the above-mentioned electric program guide solicited message that is received, the reception environment condition that contains terminal machine information based on above-mentioned digital broadcast receiving terminal, retrieve the electric program guide of above-mentioned database, can extract out and the electric program guide that has also comprised the reception environment term harmonization of above-mentioned terminal machine information from above-mentioned database, as above-mentioned selection electric program guide, be returned to above-mentioned digital broadcast receiving terminal.

36. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

Above-mentioned called station is when detecting the electric program guide of above-mentioned database, the reception environment condition of the weather information of position shown in the above-mentioned positional information that contains in the above-mentioned environmental information of the above-mentioned electric program guide solicited message that can receive based on comprising, retrieve the electric program guide of above-mentioned database, can be from the electric program guide of above-mentioned database extraction with the reception environment term harmonization of the above-mentioned weather information that has also comprised position shown in the above-mentioned positional information, as above-mentioned selection electric program guide, be returned to above-mentioned digital broadcast receiving terminal.

37. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

Constitute by the broadcast program that in the presumptive area of the region of representing the current place of above-mentioned digital broadcast receiving terminal, can normally receive from the above-mentioned selection electric program guide of above-mentioned called station foldback.

38. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

From the above-mentioned selection electric program guide of above-mentioned called station foldback is the guide look information of playing the broadcasting station of the receivable broadcast program of above-mentioned digital broadcast receiving terminal.

39. the digital broadcast station selector of record in the claim 38 is characterized in that:

Above-mentioned digital broadcast receiving terminal is as above-mentioned selection electric program guide, the guide look information of above-mentioned broadcasting station of playing receivable broadcast program can be made the guide look information of the above-mentioned broadcasting station of being returned by foldback have a guide look of the control that shows as the Channel icons of above-mentioned each the broadcast station broadcast channel of expression by when above-mentioned called station foldback is returned.

40. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

Above-mentioned called station possesses the database of being deposited as broadcast service zone figure by the cartographic information of the broadcasting service area of the receivable broadcasting channel of each reception environment condition that comprises positional information representing by each broadcasting channel, based on the represented reception environment condition of above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that is received, retrieve the above-mentioned broadcast service zone figure of above-mentioned database, the zone of the broadcast service of the peripheral receivable broadcasting channel of position or this position shown in the above-mentioned positional information that will comprise in the above-mentioned environmental information of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message figure is as selecting broadcast service zone figure to be returned to above-mentioned digital broadcast receiving terminal thus.

41. the digital broadcast station selector of record in the claim 40 is characterized in that:

Above-mentioned digital broadcast receiving terminal can be selected broadcasting channel arbitrarily from the above-mentioned selection broadcast service zone figure that is returned by foldback, and the broadcast service zone figure of this broadcasting channel is shown.

42. the digital broadcast station selector of record in claim 32 or 33 is characterized in that:

Above-mentioned digital broadcast receiving terminal is to fixedly install type terminal, vehicle mounted terminal or the portable terminal of using.

43. the digital broadcast station selector of claim 32 or 33 records is characterized in that:

Above-mentioned digital broadcasting is a received terrestrial digital broadcasting.

44. one kind can carry out with called station between communicate by letter, and can receive digital broadcast receiving terminal from the broadcasting of digital radio stations, it is characterized in that:

Will be by the environmental information of the positional information that comprises the current location of representing this digital broadcast receiving terminal, the electric program guide solicited message that required list is shown in the electric program guide request composition of the transmission of the electric program guide of receivable broadcast program under the represented reception environment condition of this environmental information sends to above-mentioned called station, when the above-mentioned electric program guide solicited message of response, with receivable electric program guide as selecting electric program guide, respond above-mentioned electric program guide solicited message, with the broadcast service of receivable broadcasting channel zone figure as at least any one party of selecting broadcast service zone figure by when above-mentioned called station foldback is returned, can carry out from above-mentioned selection electric program guide, selecting broadcast program arbitrarily, receive selected this broadcast program or from above-mentioned selection broadcast service zone figure, make the regional at least any one party of scheming in the demonstration of broadcast service of broadcasting channel arbitrarily from above-mentioned digital radio stations

The digital broadcast receiving terminal that can be used as a digital broadcast station selector uses, described digital broadcast station selector is by the digital radio stations of playing digital broadcasting, communicate the called station that circuit connects, can carry out with this called station between communicate by letter, and the digital broadcast receiving terminal that can receive from the broadcasting of above-mentioned digital radio stations constitutes, wherein, above-mentioned digital broadcast receiving terminal will comprise the environmental information of the positional information that contains the current location of representing this digital broadcast receiving terminal, the electric program guide solicited message that required list is shown in the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the reception environment condition shown in this environmental information sends to above-mentioned called station, above-mentioned called station possesses the database of being deposited as electric program guide by the receivable broadcast program of each environmental condition that comprises positional information, based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that is received, retrieve the electric program guide of above-mentioned database, to under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message, be returned to above-mentioned digital broadcast receiving terminal as the selection electric program guide by receivable broadcast program thus, above-mentioned digital broadcast receiving terminal can be selected broadcast program arbitrarily from the above-mentioned selection electric program guide by above-mentioned called station foldback, and receives selected this broadcast program from above-mentioned digital radio stations.

45. a called station that communicates the connection of circuit is characterized in that possessing:

Database, its deposit with by the receivable broadcast program of each reception environment condition that comprises positional information as electric program guide, perhaps will represent that cartographic information by the broadcasting service area of the receivable broadcasting channel of above-mentioned each reception environment condition is as at least any one party among the figure of broadcast service zone by each broadcasting channel

Electric program guide solicited message receiving element, its from can carry out with this called station between the digital broadcast receiving terminal of communicating by letter receive and to comprise that environmental information, the required list of the positional information that contains the current location of representing this digital broadcast receiving terminal are shown in the electric program guide solicited message of the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the represented reception environment condition of this environmental information;

Selection information foldback unit, it is based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that is received by this electric program guide solicited message receiving element, retrieve the electric program guide and/or the broadcast service zone figure of above-mentioned database, thus will be under the above-mentioned reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message receivable broadcast program as selecting electric program guide or will being returned to above-mentioned digital broadcast receiving terminal as at least any one party of selecting broadcast service zone figure at the broadcast service zone figure of the peripheral receivable broadcasting channel of the position shown in the above-mentioned positional information or this position

The called station that described called station can be used as a digital broadcast station selector uses, described digital broadcast station selector is by the digital radio stations of playing digital broadcasting, communicate the called station that circuit connects, can carry out with this called station between communicate by letter, and the digital broadcast receiving terminal that can receive from the broadcasting of above-mentioned digital radio stations constitutes, wherein, above-mentioned digital broadcast receiving terminal will comprise the environmental information of the positional information that contains the current location of representing this digital broadcast receiving terminal, the electric program guide solicited message that required list is shown in the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the reception environment condition shown in this environmental information sends to above-mentioned called station, above-mentioned called station possesses the database of being deposited as electric program guide by the receivable broadcast program of each environmental condition that comprises positional information, based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that is received, retrieve the electric program guide of above-mentioned database, to under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message, be returned to above-mentioned digital broadcast receiving terminal as the selection electric program guide by receivable broadcast program thus, above-mentioned digital broadcast receiving terminal can be selected broadcast program arbitrarily from the above-mentioned selection electric program guide by above-mentioned called station foldback, and receives selected this broadcast program from above-mentioned digital radio stations.

46. a digital radio stations of playing digital broadcasting is characterized in that having:

Database, its deposit with by the receivable broadcast program of each reception environment condition that comprises positional information as electric program guide, perhaps will represent that cartographic information by the broadcasting service area of the receivable broadcasting channel of above-mentioned each reception environment condition is as at least any one party among the figure of broadcast service zone by each broadcasting channel

Electric program guide solicited message receiving element, its from can carry out with this called station between the digital broadcast receiving terminal of communicating by letter receive and to comprise that environmental information, the required list of the positional information that contains the current location of representing this digital broadcast receiving terminal are shown in the electric program guide solicited message of the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the represented reception environment condition of this environmental information;

Selection information foldback unit, it is based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that is received by this electric program guide solicited message receiving element, retrieve the electric program guide and/or the broadcast service zone figure of above-mentioned database, thus will be under the above-mentioned reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message receivable broadcast program as selecting electric program guide or will being returned to above-mentioned digital broadcast receiving terminal as at least any one party of selecting broadcast service zone figure at the broadcast service zone figure of the peripheral receivable broadcasting channel of the position shown in the above-mentioned positional information or this position

The digital radio stations that can be used as a digital broadcast station selector uses, described digital broadcast station selector is by the digital radio stations of playing digital broadcasting, communicate the called station that circuit connects, can carry out with this called station between communicate by letter, and the digital broadcast receiving terminal that can receive from the broadcasting of above-mentioned digital radio stations constitutes, wherein, above-mentioned digital broadcast receiving terminal will comprise the environmental information of the positional information that contains the current location of representing this digital broadcast receiving terminal, the electric program guide solicited message that required list is shown in the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the reception environment condition shown in this environmental information sends to above-mentioned called station, above-mentioned called station possesses the database of being deposited as electric program guide by the receivable broadcast program of each environmental condition that comprises positional information, based on the reception environment condition shown in the above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that is received, retrieve the electric program guide of above-mentioned database, to under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message, be returned to above-mentioned digital broadcast receiving terminal as the selection electric program guide by receivable broadcast program thus, above-mentioned digital broadcast receiving terminal can be selected broadcast program arbitrarily from the above-mentioned selection electric program guide by above-mentioned called station foldback, and receives selected this broadcast program from above-mentioned digital radio stations.

47. digital broadcasting method of channel selection, by the digital radio stations of playing digital broadcasting, communicate called station that circuit connects, can carry out with this called station between communicate by letter, and the digital broadcast receiving terminal that can receive from the broadcasting of above-mentioned digital radio stations constitutes, can carry out channel selection to digital broadcasting arbitrarily at this digital broadcast receiving terminal, it is characterized in that:

First, above-mentioned digital broadcast receiving terminal will be shown in the electric program guide solicited message that the electric program guide request of the transmission of the electric program guide of receivable broadcast program under the represented reception environment condition of this environmental information forms by environmental information, the required list of the positional information that comprises the current location of representing this digital broadcast receiving terminal and send to above-mentioned called station

Second; Above-mentioned called station possesses the database of being deposited as electric program guide by the receivable broadcast program of each reception environment condition that comprises positional information; Based on the represented reception environment condition of above-mentioned environmental information that comprises in the above-mentioned electric program guide solicited message that receives; Retrieve the electric program guide of above-mentioned database; To under the reception environment condition of the above-mentioned digital broadcast receiving terminal that has sent above-mentioned electric program guide solicited message, be returned to above-mentioned digital broadcast receiving terminal as the selection electric program guide by receivable broadcast program thus

The 3rd, above-mentioned digital broadcast receiving terminal is selected broadcast program arbitrarily from the above-mentioned selection electric program guide that foldback is returned, and receives selected this broadcast program from above-mentioned digital radio stations.

48. a digital broacast receiver, the unit of reporting that it has the detecting unit of the receiving sensitivity that detects digital broadcasting and reports above-mentioned receiving sensitivity is characterized in that:

Above-mentioned receiving sensitivity is reported by successive value or the Stage Value more than 3 stages in the above-mentioned unit of reporting.

49. a digital broacast receiver is characterized in that: have

Detecting unit, it detects the receiving sensitivity of digital broadcasting;

Display unit, it shows above-mentioned receiving sensitivity visually can recognize the form with the relation of threshold value.

50. a digital broadcasting receives the condition detection circuit, has

Testing circuit, it detects the receiving sensitivity of digital broadcasting;

Change-over circuit, it is converted to successive value or the Stage Value more than 3 stages with above-mentioned receiving sensitivity.

51. a digital broadcast receiving method has

According to the selection of television reception receiving channels in the digital broadcasting, judge whether current location is in the step in the service area;

If current location is in outside the service area, then report this fact, if current location is in the service area, then detect from the step of the receiving sensitivity information of tuner and the acquisition of OFDM demodulator;

Based on this receiving sensitivity information, judge whether current receiving sensitivity satisfies the step for the necessary stipulated standard value of broadcasting that receives selected channel;

Determine satisfied fiducial value after, displaying contents does not reach fiducial value if determine current receiving sensitivity, then reports the step of current receiving sensitivity information.

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