CN101154953A - Digital broadcast receiver - Google Patents
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- CN101154953A CN101154953A CN200710166916.4A CN200710166916A CN101154953A CN 101154953 A CN101154953 A CN 101154953A CN 200710166916 A CN200710166916 A CN 200710166916A CN 101154953 A CN101154953 A CN 101154953A
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Abstract
To provide a digital broadcast receiver whereby a user can recognize how much a reception environment is deviated from a receivable reference value and what is a factor of making the reception impossible when the reception environment of digital broadcast is poor. When the user selects a TV on a menu screen to select a TV channel, a communication/broadcast display screen is displayed. The communication/broadcast display screen (broadcast display section) 303 displays the contents themselves of the received terrestrial digital broadcast, and a communication display section 304 displays contents-related information and data broadcast or the like transmitted with the contents. When the user selects 'sensitivity', a broadcast/reception sensitivity display screen displays broadcast reception sensitivity in a way of a bar graph. When the broadcast cannot normally be received because the broadcast reception sensitivity is lower than a prescribed value, any of the display screens for the case when reception is impossible is displayed. When broadcast reception is impossible, the broadcast display section 303 displays positional information, a reception sensitivity parameter and a message on the reception conditions in place of broadcast contents.
Description
The application is that application number is 200410002919.0, the applying date is dividing an application of January 20, denomination of invention in 2004 female case application that is digital broacast receiver.
Technical field
The present invention relates to digital broacast receiver, relate to built-in mobile model digital broacast receiver in general seat formula receiving system and car-mounted terminal, portable phone or the PDA portable terminal devices such as (Personal Digital Assistants).
Background technology
At present, as the new broadcasting of the analogue terrestrial broadcast that is substituted in national audiovisual, the preparation well afoot that received terrestrial digital broadcasting is relevant.2003, the received terrestrial digital broadcasting that starts broadcasting in the Northeast, nearly several and these 3 metropolitan regions of the East Sea was planned 2006, and broadcast area will expand the whole nation to.Thereby expect 2011, will stop existing analog broadcasting.
In the technical specification ISDB of above-mentioned received terrestrial digital broadcasting (Integrated ServicesDigital Broadcasting)-T, as modulation system, adopt OFDM (the Orthogonal Frequency DivisionMultiplexing: mode OFDM) that uses a plurality of carrier waves (carrier).The ghost image that the OFDM mode can suppress to form based on being caused by the reflection of building etc. a plurality of propagation paths (multipath) disturbs.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, allows very many signal forms on specification.From a plurality of signal forms, wait service form to select only signal form in practice according to fixing reception and mobile reception.
Among this external ISDB-T, 1 channel (band amplitude is about 5.6MHz) can be divided into 13 sections (1 sections=about 430kHz), change modulation system by section unit.Like this, but broadcasting station arbitrary decision signal structure make in 1 channel, carry out broadcasting of voice broadcast service and HDTV (High-Definition Television) or standard fixed broadcasting and moving body broadcasting.
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 and portable phone, also can realize stable reception, this is enumerated as one of principal character.From now on, great expectation has also been expressed in the service of considering this mobile reception.
Because in mobile receiving systems such as in-car TV, can carry and have the giant display of the capacity of display to a certain degree, but also possess sufficient supply of electric power source, thereby at the requirement of miniaturization and and can be not excessive, so can receive corresponding with broadband at the requirement of low power consumption.Fig. 9 is the accompanying drawing of the structure example of the data segment of employing in the service of expression received terrestrial digital broadcasting.As shown in Figure 9, in data segment 801, be assigned 13 sections of total that comprise 803,6 sections moving body frequency acceptance bands 804 of 1 section voice frequency acceptance band and 6 sections SDTV (Standard Definition TV, standard television) frequency acceptance band 805.In above-mentioned in-car TV,, can obtain enough amount of information by the broadcast service of having utilized above-mentioned data segment.In addition, though data segment 801 is converted into the transmission frequency spectrum (OFDM section) 802 of frequency axis, this moment, receive the central sections that 803 corresponding 1 section receiving unit 806 (A layer) are configured to 13 sections with voice.
Figure 10 is the accompanying drawing of structure example of other data segment of expression received terrestrial digital broadcasting service.As shown in figure 10, in data segment 901, be assigned 13 sections that comprise 1 section portable frequency acceptance band 903 and 12 sections HDTV (High-Definition Television) frequency acceptance bands 904.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 layer) of the 1 section frequency acceptance band corresponding with portable frequency acceptance band 903 is configured to 13 sections central sections.
In addition, in structure shown in Figure 10, 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 distribute 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, various wave interference general and that be vulnerable in the electric wave transfer path influence, 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 sometimes etc., especially under the bigger environment of the time-varying influence of fading of its received signal intensity, the good video of can not regenerating sometimes.
Be the deterioration of this reception environment of correspondence, adopted and in receiving system, detected accepting state that the mode of broadcasted content etc. in view of the above automaticallyes switch.(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
With regard to the special problem when receiving with regard to digital broadcasting, in digital broacast receiver, the middle reception situation that does not have the sort of " fuzzy appear before one's eyes " in the analog broadcasting, " though do not see but still can appear before one's eyes to a certain extent " and so on, in fact only exist can accepting state with can not accepting state in a state, that is, exist the relevant clear and definite threshold value that could receive.Under the occasion of analog broadcasting, owing to look the intermediateness that the hearer is easy to confirm the situation that receives, thereby under the numerous and disorderly occasion of image, can the limit observe the picture limit and adjust antenna direction, perhaps change the position of receiving system, the environment that comes on-the-spot retrieval to be suitable for receiving thus.
Yet in digital broadcasting, look the hearer under the occasion that can not receive broadcasting, be difficult to reception and display characteristic by above-mentioned numeral, judge current reception environment is the environment that is suitable for broadcast reception on which kind of degree, perhaps on which kind of degree, be in the state that is unsuitable for broadcast reception etc., thus exist be difficult to carry out such as the place to where to the problem that moves the relevant judgement that can receive etc.
The objective of the invention is to, provide a kind of at least under the occasion that can not receive digital broadcasting, can obtain the digital broacast receiver of the more details of relevant current reception situation.
The present invention is not defined in received terrestrial digital broadcasting with object in addition, but is object with all general digital broadcastings.Especially the broadcasting expectation towards the moving body portable terminal device there is bigger effect,, can enumerates and be predefined in the 2.6GHz satellite digital voice broadcast service (mobile broadcast) that Japan began to broadcast in 2004 such as object.
The present invention is a kind of digital broacast receiver, it is characterized in that: have the sensitivity parameter of reception detecting unit, it detects the reception sensitivity parameter of digital broadcasting; Reception situation display unit, it shows based on the reception situation by the detected above-mentioned reception sensitivity parameter of above-mentioned reception sensitivity parameter detecting unit; Obtain the location information acquiring unit of positional information.
Like this, look the reception situation under the reception environment that the hearer can hold current receiving position and current location interimly, can carry out retrieval based on the judgement that could receive of environment adjustment and the environment (position) that is suitable for receiving.Above-mentioned reception sensitivity parameter preferably comprise the received power of above-mentioned digital broadcasting or C/N than at least any one.As the parameter that is used for judging in digital broadcasting the reception situation, received power and C/N are generally more well known than (Carrier to Noise Rate).These values are according to modulation system and numeralization rate, and it is different that it receives required lower limit.
Preferably come having or not of display of broadcast service from the positional information that obtains by above-mentioned location information acquiring unit.
This is because can know having or not of broadcast service by current location.
Under this occasion, have a guide look of data if maintain the expression position with the broadcasting station of the corresponding relation in the broadcasting station that may receive, then can carry out above-mentioned reception situation simply and show.For the broadcasting station guide look data corresponding with the position, receiving system needn't necessarily remain to inside with it as fixed data, also can structure be, can utilize communication line, obtains up-to-date information from distribution address in addition.
Preferably have the 1st storage part in addition, it is stored in the above-mentioned reception situation that a plurality of times obtain.Preferably also have the 2nd storage part, it is stored in the above-mentioned reception situation that a plurality of places obtain.Like this,, and it is shown, then be easy to feeling to come the grasp situation if can generate 2 dimension figures of relevant time and position.The 1st storage part and the 2nd storage part can be same storage parts in addition, also can be different storage parts.
According to the present invention,, can analyze the reason that can not receive by monitoring each parameter value.
Such as obtaining following countermeasure: promptly, coming with moving bodys such as vehicles when mobile, though sufficient in received power, C/N can receive by underspeeding than under the low occasion; Under the occasion that its received power is low in the street,,, move etc. but also can receive place that reflection involves standing wave even veil is perhaps arranged to the place that does not have the electric wave veil.
The present invention is a kind of digital broacast receiver in addition, it is characterized in that: have the sensitivity parameter of reception detecting unit, it detects the reception sensitivity parameter of digital broadcasting; Reception situation display unit, it shows based on the reception situation by the detected above-mentioned reception sensitivity parameter of above-mentioned reception sensitivity parameter detecting unit; The positional information input unit of input position information.Under the occasion of having distinguished the position, by it being imported the processing of obtaining that also can omit positional information.
Digital broacast receiver of the present invention in addition preferably is built in such as mobile telephone, vehicle mounted terminal, seat formula digital broadcast images receiver, portable information communication terminal (PDA etc.) and waits and use.
Also can be a kind of digital broacast receiver that can receive received terrestrial digital broadcasting and utilize the mobile broadcast of satellite in addition.
According to other viewpoint of the present invention, a kind of digital broacast receiver is provided, it is characterized in that: have the sensitivity parameter of reception detecting unit, it detects the reception sensitivity parameter of digital broadcasting; Reception situation display unit, it shows based on the reception situation by the detected above-mentioned reception sensitivity parameter of above-mentioned reception sensitivity parameter detecting unit; The positional information input unit of input position information.
After utilizing said apparatus, the user also can based on the positional information obtaining or identified, come input position, even it is good not have automated location acquiring units such as GPS.
Description of drawings
Fig. 1 is the functional block diagram of the mobile telephone structure of the built-in digital broacast receiver based on embodiment of the present invention 1 of expression.
Fig. 2 is the functional block diagram of internal structure of the ofdm demodulator of expression mobile telephone shown in Figure 1.
Fig. 3 is the accompanying drawing of structure example of the display frame of expression mobile telephone shown in Figure 1.
Fig. 4 is illustrated in the mobile telephone shown in Figure 1, and the hearer selects digital broadcasting to receive to carry out the action till image shows and the flow chart of the change action flow process of the display frame that changes based on receiving sensitivity from looking.
Fig. 5 is illustrated in the display frame of mobile telephone shown in Figure 1, the accompanying drawing of other display mode (variation) of receiving sensitivity information.
Fig. 6 is the reception situation display frame example of expression based on the digital broacast receiver of embodiment of the present invention, Fig. 6 (A) is illustrated in the accompanying drawing that demonstrates the display frame example of looking hearer's motion track on the map, and Fig. 6 (B) is that the reception information in a plurality of places shows example.
Fig. 7 is the accompanying drawing of display frame structure example of the seat formula receiving system of the built-in digital broacast receiver based on embodiment of the present invention 2 of expression.
Fig. 8 is the accompanying drawing of display frame structure example of the portable information communication terminal of the built-in digital broacast receiver based on embodiment of the present invention 3 of expression.
Fig. 9 is the structure chart of a kind of mode of expression received terrestrial digital broadcasting service.
Figure 10 is the structure chart of the another kind of mode of expression received terrestrial digital broadcasting service.
Embodiment
Basically say, the digital broacast receiver that the present invention relates to be a kind of can be to the hearer that looks who comes receiving digital broadcast by portable terminal, be and seek the place that can receive broadcasting and mobile look the hearer, provide to become and move device into the information of good judgement guide to that direction.Even be a kind of for fixed digital broacast receiver, especially be equipped with the seat formula television equipment of antenna, under the occasion that can not receive being arranged at certain indoor position, also can be provided at this indoor information that whether has the position that can receive, if exist, then provide the device of the information of relevant this position.
Following with reference to accompanying drawing, the digital broacast receiver based on embodiment of the present invention is explained.In addition hereinafter,, the ground digital broacast receiver is described, but for other digital broacast receiver, such as receiving systems such as satellite digital broadcastings, these technology are also applicable as the digital broacast receiver example.
At first, to digital broacast receiver, be that example is explained with the received terrestrial digital broadcasting receiving system that is built in mobile telephone based on embodiment of the present invention 1.Fig. 1 is the functional block diagram of expression based on the structure example of the received terrestrial digital broadcasting receiving system of present embodiment.As shown in Figure 1, the portable terminal device 100 that has based on the received terrestrial digital broadcasting receiving system of present embodiment has the 1st antenna 101, tuner 102, ofdm demodulator 103, decoder portion 104, primary storage portion 106, memory 107, control part the 109, the 2nd antenna 110, w-CDMA handling part 112, voice signal handling part 115, vision signal handling part 118.Received terrestrial digital broadcasting receiving system 100 has secondary medium 105, timer 108, loudspeaker 116, loud speaker 117, display 119 in addition.W-CDMA handling part 112 has Base-Band Processing portion 113, call voice handling part (AD/DA) 114.
Below the action of portable terminal device 100 with above-mentioned received terrestrial digital broadcasting receiving system is explained.The terrestrial digital broadcasting signal that is received by the 1st antenna 101 is voice signal and vision signal via tuner 102, ofdm demodulator 103,104 recoveries of decoder portion, voice signal is via voice signal handling part 115, by loud speaker 117 regeneration, vision signal is imported into vision 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, have the w-CDMA handling part 112 of Base-Band Processing portion 113 and call voice handling part 114, export by loud speaker 117.Voice by loudspeaker 116 inputs pass through w-CDMA handling part 112 and RF handling part 111 conversely, are sent from the 2nd antenna 110.
In above-mentioned mobile telephone 100, 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 vision signal handling part 118 from Base-Band Processing portion 113.Each structural element of control part 109 these mobile telephones 100 of control.Structural element outside above-mentioned is identical with general received terrestrial digital broadcasting receiving system.
Fig. 2 is the functional block diagram of internal structure example of the ofdm demodulator 103 of expression mobile telephone 100 shown in Figure 1.As shown in Figure 2, ofdm demodulator 103 has quadrature demodulation portion 201, phasing portion 202, FFT portion 203, frame synchronization portion 204, detection section 205, frequency time de-interweaving portion 206, bit deinterleaving portion 207, Veterbi decoding portion 208, byte deinterleaving portion 209, energy dissipation portion 210, TS reproducing unit 211, RS lsb decoder 212.
In quadrature demodulation portion 201, the broadcast singal that has converted IF (intermediate frequency) signal to by the tuner 102 of mobile telephone shown in Figure 1 100 is digitized to be imported.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, detected C/N signal is exported by C/N efferent 213.
On the other hand, from TS (Transport Stream) signal of detection section 205 output through overfrequency time de-interweaving portion 206, bit 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, its BER (Bit Error Rate, the error rate) relevant parameter is output to the control part 109 of mobile telephone shown in Figure 1 by BER efferent 214, and its TS signal is output to decoder portion 104 (Fig. 1) by TS efferent 215.
Also can be set in addition, disconnection RS decodes and exports BER, satisfies in the BER value under the occasion of certain fiducial value, makes RS decoding path export TS.
In addition as described later, also can show at the same time under the occasion that receives image and receiving sensitivity, detect the C/N decoded BER of RS (Reed-Solomon) when, the also sustainable decoder portion 104 that sends to of TS.About received power, can judge from the value of the AGC (Auto Gain Control) of the output IF of the tuner of the leading portion side that has been configured to quadrature demodulation portion 201 from control.
The structural element that comprises in each structural element in the ofdm demodulator shown in Figure 2 in addition 103 and the general ofdm demodulator is identical, omits the relevant explanation of each structural element.
Next, in the digital broacast receiver to said structure, be used to represent that the digital broadcasting that received and the technology of receiving sensitivity information are explained based on present embodiment.Fig. 3 is the accompanying drawing of display frame structure example of the mobile telephone of the built-in digital broacast receiver based on present embodiment of expression.Fig. 3 (a) is the demonstration example of the menu screen of mobile telephone.In the display frame shown in Fig. 3 (a), demonstrate the 1st display part 301 that shows battery allowance, communication sensitivity etc., the 2nd display part 302 of display menu options.The menu option that shows on the 2nd display part 302 comprises TV, website, mail, address address list and planning chart project.
Below, in display part 302, having selected the occasion of TV, promptly selecting to utilize the occasion that receives received terrestrial digital broadcasting based on the digital broacast receiver of present embodiment, be explained with regard to the demonstration example of this mobile telephone.For other menu option outside above-mentioned, since identical with the function that comprises in the general mobile telephone, thereby omit explanation in this manual.
In the menu screen shown in Fig. 3 (a), select TV, carry out the TV 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 the communication display part 304 corresponding with the 2nd display part 302 among Fig. 3 (a) constitutes.Demonstrate the content body of the received terrestrial digital broadcasting that is received in the display part 303 in broadcasting, in communication display part 304, demonstrate relevance information that the content of enclosing sends and data broadcasting etc.For relevance information, can select the related informations such as result, Hawks homepage in personal data, other court to make it to show such as A player.
After in communication display part 304, having selected " sensitivity ", demonstrate the broadcast reception sensitivity display frame shown in Fig. 3 (c).The receiving sensitivity that receiving sensitivity display frame 305 comes display of broadcast in bar figure mode.In demonstration example based on present embodiment, will be such as receiving sensitivity 100 as the fiducial value that can normally receive broadcasting.Preferably constitute in addition, selective reception power and C/N than in have more that a side of low value is used as receiving sensitivity, even low value under the occasion of the fiducial value (this value is made as 100) that satisfies necessity, also can be judged and can normally receive broadcasting.
In mobile telephone based on present embodiment, since the receiving sensitivity of broadcasting be lower than setting and can not normally receiving under the occasion of broadcasting, of the display frame when demonstrating such as can not receive shown in Fig. 3 (d)～Fig. 3 (f).In the broadcasting display part 303 in the time can not receiving, replace broadcasted content, demonstrate positional information and receiving sensitivity parameter.In Fig. 3 (d), the 1st display frame as can not receive the time demonstrates " being in outside the service area " message bar figure relevant with receiving sensitivity.In Fig. 3 (e), the 2nd display frame as can not receive the time demonstrates " because of noise can not receive " message and C/N bar figure.For C/N, demonstrate the value that is lower than fiducial value 100, promptly about 70 value.In Fig. 3 (f), the 3rd display frame as can not receive the time demonstrates the bar figure of " electric wave is crossed weak can not the reception " message and received power.For received power, demonstrate the value that is lower than fiducial value 100, promptly about 70 value.Like this, message such as " being in outside the service area " will be that origin shows with positional information and receiving sensitivity parameter.
Because the digital broacast receiver based on present embodiment is built in mobile telephone, thereby owing to look moving of hearer, the receiving sensitivity of its broadcasting will change successively.Therefore, the display frame of normal Fig. 3 (b) that receives broadcasting or Fig. 3 (c) and the Fig. 3 (d) can not receive the time preferably automatically switch according to the reception situation to the display frame of Fig. 3 (f).
Because in digital broacast receiver based on present embodiment, broadcasting display part 303 and receiving sensitivity display part 305 are shown in other zone, thereby also have can be under the occasion that reception environment worsens, the variation of receiving sensitivity is watched on the limit from receiving sensitivity display part 305, the direction of antenna and the advantage of receiving position are adjusted in the limit.
To be expression utilize above-mentioned mobile telephone to select receiving to of digital broadcasting to carry out the action till video shows and the flow chart of the flow process of the display frame change action that changes based on receiving sensitivity from looking the hearer to Fig. 4.In addition hereinafter, the process that the action of mobile telephone side is controlled by control part shown in Figure 1 109 is explained.
At first, look the hearer on the menu screen shown in Fig. 3 (a), select TV (step 401) as the selection button that is used to receive TV, next, (steps 402) such as selective reception channel, display modes.Being provided with based on the occasion of the positional information measuring ability of GPS etc. in mobile telephone or logining in terminal in advance has under the occasion of receiving position, judges to have or not the relevant broadcasting of selected channel promptly whether receiving position is in the service area (step 403).If in step 403, its receiving position is in outside the service area, then shows this fact (step 404).If be in the service area, mobile telephone detects from the receiving sensitivity information (aftermentioned) (step 405) of tuner 102 (Fig. 1) and ofdm demodulator 103 (Fig. 1) acquisition.Mobile telephone judges that next based on this receiving sensitivity information whether current receiving sensitivity satisfies for receiving the necessary stipulated standard value of broadcasting (step 406) of above-mentioned selection channel, if satisfy benchmark, then demonstrates image (step 407).
In current receiving sensitivity, all do not satisfy the occasion of specified reference value such as received power and C/N ratio, perhaps the value of any one party does not reach under the occasion of fiducial value (step 408, step 410), shown in Fig. 3 (d)～Fig. 3 (f), display frame example according to can not receive the time, demonstrate expression and can not receive this true message (step 409,411 and 412), demonstrate receiving sensitivity information simultaneously.But look the hearer limit and observe receiving sensitivity information, the frontier inspection rope is suitable for the antenna direction of broadcast reception and receiving position etc., finds out more suitably position.
Next, in the digital broacast receiver based on present embodiment, the method for measuring receiving sensitivity is explained.To as receiving sensitivity parameter, adopted the received power and the example of the C/N ratio of received signal to be explained.Constitute among Fig. 1, tuner 102 detects received power, and ofdm demodulator 103 (in 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 constitutes in addition, the BER of received signal is outputed to the control part 109 of Fig. 1 from the BER efferent 214 of Fig. 2.
In addition, each parameter of received power and C/N ratio is being carried out comprehensive assessment, calculating under the occasion of receiving sensitivity information, also can detect, and this value reached becoming undoubtedly seemingly threshold value BER=2 * 10 of error such as the BER value behind the Veterbi decoding
-4The time accepting state as the benchmark of receiving sensitivity 100%.Like this, under the occasion of not utilizing the BER value, to C/N received power when, also can utilize the calculating formula that derives in advance (such as, carry out the C/N calculating formula of the weighting and so on of received power when) calculate receiving sensitivity.Perhaps as more easy method, also can select C/N than with received power in the bad side of condition, it is worth as receiving sensitivity information.
Following with reference to accompanying drawing, the variation based on the display mode in the digital broacast receiver of above-mentioned execution mode is explained.Fig. 5 (a)～Fig. 5 (d) is the accompanying drawing of display mode that expression is different from the receiving sensitivity information of mode shown in Figure 3.The demonstration example of representing respectively among Fig. 5 almost shows in the whole display frame of mobile telephone in addition, such as under the occasion of the broadcast reception sensitivity display frame of the communication broadcast display frame that demonstrates Fig. 3 (b) and Fig. 3 (c), can automatically display frame be switched to shown in Figure 5 each and show example by user operation or based on receiving sensitivity etc.
In the demonstration example 1 shown in Fig. 5 (a), represent respectively that with bar figure C/N is than (C/N), received power (Power) and they have been carried out the receiving sensitivity (Total) of overall merit.In the demonstration example 2 shown in this external Fig. 5 (b), only with above-mentioned overall merit receiving sensitivity show with bar figure.According to these display modes, look the hearer and can hold current accepting state based on the demonstration that continuously changes shown parameter to a certain extent, and based on these demonstrations, attempt changing the aerial position of mobile telephone and receiving position etc., can explore better reception environment thus.
In the demonstration example 3 shown in Fig. 5 (c), received power and C/N ratio are carried out two-dimensional transformations show.The longitudinal axis is represented received power (power), and transverse axis is represented C/N (ratio).Among Fig. 5 (c), the current reception situation of point 502 expressions.The region representation that has oblique line can reception area.According to the demonstration shown in Fig. 5 (c), look the hearer and can explore relevant received power and C/N than more good reception environment based on 2 dimension information.
In the demonstration example 4 shown in Fig. 5 (d), represent receiving sensitivity till current along time (time) axle.Like this, even in same receiving position, its receiving sensitivity also has the occasion of time dependent behavior, perhaps inferior with the occasion that meteorological condition and various environmental condition change in its receiving sensitivity, can know the variation figure of receiving sensitivity, the guide in the time of can obtaining obtaining better reception environment.
Though more than introduced the demonstration example of the receiving sensitivity information in the digital broacast receiver of present embodiment, but display packing for receiving sensitivity information, in addition, can be according to kind, the occupation mode of display terminal, look hearer's hobby etc., consider various figures.
Fig. 6 (A) and Fig. 6 (B) represent that other shows example.Demonstration example shown in Fig. 6 (A) and Fig. 6 (B) can constitute and show in display frame simultaneously, also can be waited by diverter switch and switch demonstration.Fig. 6 (A) is illustrated in the state that demonstrates map 1001 in the display frame.On this map 1001, show the track 1003 that mobile telephone moves, demonstrate such as in each official hour, mobile telephone is present on the position of P1～P5.Figure 10 (B) represents received power and C/N ratio from each position of P1 to P5 with the numerical value form.In addition, positional information and received power and C/N ratio can be deposited memory.Obtain positional information and reception information by each stipulated time correspondence, and store memory into.By the demonstration shown in reference Fig. 6 (A) and Fig. 6 (B), look the hearer and can obtain to be used to estimate relative current location P5, which direction to move the information that its reception situation can improve to.
As mentioned above, according to digital broacast receiver,, look the hearer and can retrieve the state that is suitable for broadcast reception based on the receiving sensitivity information that on picture, shows in the occasion that reception environment has worsened based on present embodiment.Under the occasion that this external broadcasting that receives is interrupted suddenly showing, also can make the user know that its reason is this fact that is caused by the reception situation, can be the user sense of comfort to a certain degree is provided.
Next with reference to accompanying drawing, the digital broacast receiver based on embodiment of the present invention 2 is explained.In the present embodiment, mainly to be object at the indoor seat formula received terrestrial digital broadcasting receiving system that uses.In addition, though have feature based on the digital broacast receiver of present embodiment aspect the form of display frame, other structure and action and much at one based on the digital broacast receiver of execution mode 1.
Fig. 7 is the accompanying drawing of expression based on the structure example of the digital broacast receiver display frame of present embodiment.Digital broacast receiver based on present embodiment has video display part 601, antenna 602, loud speaker 603, and the main internal structure and the structure of Figure 1 and Figure 2 are much at one.In Fig. 7,, when can not receive shown in Fig. 7 (b) broadcasted, on picture, demonstrate the susceptibility information that receives demonstrating the image that when can receive shown in Fig. 7 (a) broadcasted, is received on the picture.The demonstration example of the demonstration example 1 of reception susceptibility information representation the becoming Fig. 5 (a) shown in Fig. 7 (b) shows the display format that shows among example 2～Fig. 5 (d) under the example 4 but also can be used as among Fig. 5 (b), perhaps also can be used as other display format.The switching of picture shown in picture shown in Fig. 7 (a) and Fig. 7 (b) can be automaticallyed switch by receiving sensitivity, perhaps also can be switched by the operation of looking the hearer.
Behind the digital broacast receiver of employing based on present embodiment, under the occasion of which indoor position configuration receiving system, can explore the position that is provided with that is suitable for receiving based on receiving sensitivity information in decision.Such as, the enough but C/N of known its received power than low occasion under, can move to place with the position is set away from the household electrical appliances that become the noise occurrence cause, with and periphery do not have barrier and a good place of intervisibility, under the low occasion of known its received power, can will the place that the position moves to window and can receive reflected wave, standing wave be set.Under the occasion that this external broadcasting that receives is interrupted suddenly showing, also can make the user know that its reason is this fact that is caused by the reception situation, can be the user sense of comfort to a certain degree is provided.
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 the digital broacast receiver of present embodiment has feature in the form of display frame, other structure and action and much at one based on the digital broacast receiver of execution mode 1.
Fig. 8 is the accompanying drawing of expression based on the display frame structure example of the digital broacast receiver of present embodiment.Digital broacast receiver based on present embodiment has broadcasting display part 701, communication display part 702, receiving sensitivity show bar 703 and operating portion 704, and its internal structure is identical with the device of Figure 1 and Figure 2.
In the present embodiment, with above-mentioned execution mode 1 same, under the occasion that reception environment has worsened, look the hearer and can retrieve the state that is suitable for broadcast reception based on the receiving sensitivity information that shows on the picture.
[table 1]
Table 1
(broadcasting station guide look data)
| The broadcasting station | The coverage |
| ○○○ | North latitude A degree a branch～B degree b divides east longitude C degree c branch～D degree d branch |
| △△△ · · · · | North latitude E degree e branch～F degree f divides east longitude G degree g branch～H degree h branch |
Also can constitute in addition,, come the broadcasting station guide look data shown in the display list 1 such as passing through operating operation portion 704.As shown in table 1, broadcasting station guide look data can show service area by each broadcasting station as range information.By itself and current location information are compared, can obtain to receive at present the information of which broadcast station broadcast, and on which position, can receive information such as which broadcast station broadcast.In other embodiments, also can carry out same demonstration.In this external table 1, for ease of record, the range information of broadcasting station service area is a rectangle, but general most being in delimited in the circular scope.
As mentioned above, according to digital broacast receiver based on each execution mode of the present invention, look the hearer and can hold reception susceptibility information under the current reception environment, under the occasion that reception environment worsens, can know the distance fiducial value that can receive and differ what, and former thereby can not receive because of which kind of.
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.
Such as, its user can be set in digital broacast receiver be used for the positional information input unit of input position information.The user also can import this positional information based on the positional information of other acquisition or the positional information that the user identified.Even thereby have good strong points of automated location acquiring unit such as not possessing GPS.Positional information also can be imported based on waiting such as the address demonstration, is converted to latitude, longitude information etc. at device side.
The effect of invention
According to digital broacast receiver of the present invention, can hold reception susceptibility information under the current reception environment depending on the hearer, under the occasion that reception environment worsens, can know a reference value that distance can receive and differ what, and former thereby can not receive because of which kind of.
In addition, by additional location information, can be easy to grasp as improving the reception situation with feeling, to which direction move as good.
Symbol description
101... antenna, 102... tuner, 103...OFDM demodulator, 104... decoder section, 105... secondary medium, 106... primary storage section, 107... memory, 108... timer, 109... control section, 110... antenna, 111...RF handling part, 112...w-CDMA handling part, 113... Base-Band Processing section, 114... the call voice handling part, 115... voice signal processing part, 116... loudspeaker, 117... loudspeaker, 118... the vision signal handling part, 119... display, 201... quadrature demodulation section, 202... phase place correction unit, 203...FFT section, 204... frame synchronization section, 205... detection section, 206... frequency time de-interweaving section, 207... bit deinterleaving section, 208... Veterbi decoding section, 209... byte deinterleaving section, 210... energy dissipation section, 211... reproducing unit, 212... lsb decoder, 213...C/N specific output section, 214...BER output section, 215...TS output section, the demonstration sections such as 301... battery allowance communication susceptibility, 302... menu option demonstration section, 303... broadcasting demonstration section, 304... communication demonstration section, 305... receives susceptibility demonstration section, and 501... shows picture, 502... depending on the current position of hearer point, 601... video demonstration section, 602... antenna, 603... loudspeaker, 701... broadcasting demonstration section, 702... communication demonstration section, 703... receives susceptibility show bar, 704... operating portion
Claims (5)
1. a digital broacast receiver is characterized in that: have
Receive the sensitivity parameter detecting unit, it detects the reception sensitivity parameter of digital broadcasting;
Reception situation display unit, it shows based on the reception situation by the detected above-mentioned reception sensitivity parameter of above-mentioned reception sensitivity parameter detecting unit;
Described reception situation display unit display message under can not the situation of receiving digital broadcast.
In the claim 1 record digital broacast receiver, it is characterized in that:
Described reception situation display unit adopts time shaft so that the parameter of the situation of reception shows with changing.
In the claim 1 record digital broacast receiver, it is characterized in that:
Positional information with the positional information of obtaining obtains the unit,
Described reception situation display unit and positional information show the parameter of described reception situation accordingly.
In the claim 1 record digital broacast receiver, it is characterized in that:
Described reception situation display unit switches ground and shows that the parameter that receives image demonstration and described reception situation shows.
In the claim 1 record digital broacast receiver, it is characterized in that:
Described reception situation display unit shows the reason that can not receive data broadcasting.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11411/2003 | 2003-01-20 | ||
| JP2003011411A JP4054686B2 (en) | 2003-01-20 | 2003-01-20 | Digital broadcast receiver |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100029190A Division CN1520047A (en) | 2003-01-20 | 2004-01-20 | Digital broadcast receiving appts. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101154953A true CN101154953A (en) | 2008-04-02 |
| CN101154953B CN101154953B (en) | 2012-08-15 |
Family
ID=32900324
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100029190A Pending CN1520047A (en) | 2003-01-20 | 2004-01-20 | Digital broadcast receiving appts. |
| CN200710166916.4A Expired - Fee Related CN101154953B (en) | 2003-01-20 | 2004-01-20 | Digital broadcast receiver |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100029190A Pending CN1520047A (en) | 2003-01-20 | 2004-01-20 | Digital broadcast receiving appts. |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4054686B2 (en) |
| CN (2) | CN1520047A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689836A (en) * | 2016-08-03 | 2018-02-13 | 福特全球技术公司 | The method and apparatus for detecting and reporting for radio signal strength |
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|---|---|---|---|---|
| JP4503400B2 (en) * | 2004-09-01 | 2010-07-14 | パナソニック株式会社 | Mobile terminal device |
| KR100744316B1 (en) * | 2004-09-21 | 2007-07-30 | 삼성전자주식회사 | Apparatus and method for receiving Digital Multimedia Broadcasting service in A Mobile communication system |
| JP5127112B2 (en) * | 2004-12-07 | 2013-01-23 | 京セラ株式会社 | Digital broadcast receiver |
| US7978269B2 (en) | 2005-04-26 | 2011-07-12 | Panasonic Corporation | Portable television-broadcast reception unit, television-broadcast reception method, television-broadcast reception program, and computer-readable record medium with television-broadcast reception program |
| JP4859412B2 (en) * | 2005-08-26 | 2012-01-25 | クラリオン株式会社 | Digital broadcast receiving apparatus, digital broadcast receiving method, and program |
| JP4931037B2 (en) * | 2005-11-08 | 2012-05-16 | シャープ株式会社 | Data broadcast content display device and data broadcast content display method |
| KR100821760B1 (en) | 2006-07-28 | 2008-04-11 | 엘지전자 주식회사 | Channel diagnosis and edition system and control method for using receiving signal sensitivity |
| JP2008079186A (en) * | 2006-09-25 | 2008-04-03 | Sanyo Electric Co Ltd | Reception method and reception apparatus |
| JP4752713B2 (en) * | 2006-10-13 | 2011-08-17 | 三菱電機株式会社 | Television receiver |
| JP4679543B2 (en) * | 2007-03-27 | 2011-04-27 | 京セラ株式会社 | Communication terminal |
| JP4894716B2 (en) * | 2007-10-22 | 2012-03-14 | アイシン・エィ・ダブリュ株式会社 | Digital broadcast receiving system and program |
| JP5487028B2 (en) * | 2010-06-25 | 2014-05-07 | 株式会社Ｎｔｔドコモ | Content display device and content display method |
| JP2013026868A (en) * | 2011-07-22 | 2013-02-04 | Kyocera Corp | Communication terminal, advance notification program, and advance notification method |
| JP5214814B1 (en) * | 2012-03-05 | 2013-06-19 | 株式会社東芝 | Electronic device and reception control method |
| KR101946054B1 (en) * | 2012-08-23 | 2019-02-08 | 현대모비스 주식회사 | Audio output device and method capable of analog-type sound processing of digital brodacasting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617466A (en) * | 1995-03-20 | 1997-04-01 | Harris Corporation | Mechanism for controllably enabling test set to assert off-hook condition on telephone line in dependence upon detection of prescribed voltage level and absence of data traffic |
| JP3025190B2 (en) * | 1996-03-06 | 2000-03-27 | リーダー電子株式会社 | How to measure and collect electric field strength |
| TW432837B (en) * | 1998-07-30 | 2001-05-01 | Sony Computer Entertainment Inc | Information receiver, information reception method and information transmission and reception system |
-
2003
- 2003-01-20 JP JP2003011411A patent/JP4054686B2/en not_active Expired - Fee Related
-
2004
- 2004-01-20 CN CNA2004100029190A patent/CN1520047A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689836A (en) * | 2016-08-03 | 2018-02-13 | 福特全球技术公司 | The method and apparatus for detecting and reporting for radio signal strength |
| CN107689836B (en) * | 2016-08-03 | 2022-03-15 | 福特全球技术公司 | Method and apparatus for radio signal strength detection and reporting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004228695A (en) | 2004-08-12 |
| CN1520047A (en) | 2004-08-11 |
| CN101154953B (en) | 2012-08-15 |
| JP4054686B2 (en) | 2008-02-27 |
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