JP2007266727A - Broadcast receiver, receiving method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To notify the receiving situation of a channel under viewing/listening to a user, and to detect and notify the broadcast receiving situation of other channel to the user. <P>SOLUTION: Frequency of a physical channel under reception is set in a tuner 21 and a decision is made whether that physical channel is receivable (selectable) or not. If a decision is made that reception is impaired, the broadcast stop flag region 61 of other physical channel and flag information of outside the range flag region 62 are acquired with reference to a channel list. Guide image data stored in an ROM 2 and/or a flash memory 4 is then read out and a screen guiding outside the range and a screen guiding the receiving condition of all physical channels registered on the channel list 12 are displayed on a display section 25. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus, a broadcast receiving method, and a broadcast receiving program for displaying the reception state of each channel on a display device when the reception state of a television broadcast is deteriorated.

  With the start of terrestrial digital broadcasting, various research and development related to the reception of digital television broadcasts on so-called mobile terminals such as mobile phones, notebook PCs (personal computers), and PDAs (Personal Digital Assistants) have been conducted. In particular, terrestrial digital broadcasting has a feature that it is suitable for receiving images on a mobile object such as a mobile terminal. In other words, analog television broadcasting that has been widely used has a problem that it is particularly disadvantageous for broadcast reception on a mobile object due to the property that it is easily affected by the surrounding environment peculiar to analog broadcasting radio waves. . On the other hand, digital television broadcasting is a broadcast radio wave that multiplexes digital signals, so the signal information is, in principle, multi-valued digital data, although the strength and weakness of the radio wave occurs due to the influence of the surrounding environment. As long as radio waves can be received, the effect on video and audio is minimal.

  In this way, digital television broadcast images have characteristics superior to analog television broadcast images, but what are electrical and electronic devices that enable television broadcast images to be received by analog television broadcasts? There is a problem that there are not a few parts that are different in usability in practical use. Digital television broadcasting is not versatile in receiving the broadcast, and the transmission range of digital television broadcasting radio waves is limited. Therefore, there is a problem in that it is difficult to output a suitable video / audio if the radio wave does not reach or reaches even if it is extremely weak or noise is mixed. In such a case, in the case of analog television broadcasting, noise is gradually mixed in the video on the monitor (so-called sandstorm), and the user can instantly recognize that the reception state of the radio wave is bad. On the other hand, in electrical and electronic equipment that can receive digital television broadcasts, if the reception of radio waves deteriorates and video / audio output is no longer possible, video output on the monitor stops and black It has a unique function of continuing to display the screen. In other words, the user cannot grasp the deterioration of the broadcast radio wave in time series, suddenly faced the video / audio output stoppage, and at first glance, understand whether it is a failure of electrical / electronic equipment or the reception situation deteriorated There is a problem that you can not.

In view of such a difference between analog and digital, Patent Document 1 discloses a broadcast receiving apparatus that can select a digital television broadcast, an error correction unit that detects an error of a broadcast radio wave, and the error correction. If it is determined that it is difficult to receive a broadcast radio wave due to error detection by the monitoring section, the user is notified that reception is difficult, and whether or not the broadcast provider has stopped broadcasting due to the deterioration of the reception status. An invention relating to a broadcast receiving apparatus for informing the above is disclosed.
JP 2003-348466 A

  However, the invention disclosed in Patent Document 1 can only notify the user of the reception status and the like regarding the channel that was being viewed. For this reason, after receiving such notification, the user must search the receivable channels sequentially by operating a channel change switch or the like, which is inconvenient.

  Accordingly, an object of the present invention is to notify the user of the reception status and the like regarding the channel that was being viewed, detect the broadcast reception status of the other channel, and based on the information obtained by the detection, This is to notify the user of the reception status so that the user can instantly grasp the reception status of other channels.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a broadcast receiving apparatus, which stores a plurality of selectable broadcast waves as a channel list, and a channel list stored in the storage means. The receiving means for receiving the broadcast wave by selecting any one of the channels, the reception deterioration determining means for determining the deterioration of the reception of the broadcast wave during reception of the broadcast wave by the receiving means, and the reception deterioration When the determination means determines that the reception is deteriorated, the reception status determination means for determining the reception status for other channels in the channel list, and the result determined by the reception status determination means is the channel list. When the determination of the reception state by the storage control unit that controls to store in the storage unit in association with the reception state determination unit, A return means for returning to the channel received by the receiving means, and a display means for displaying the reception status of other channels stored by the storage control means when the return means returns. It is characterized by.

  According to a second aspect of the present invention, in the first aspect of the invention, the reception state determination unit includes a first determination unit that determines whether the channel can be received, and the first determination. A second determination for determining whether or not NIT (Network Information Table) and / or PMT (Program Packet Table) data can be acquired from the received broadcast wave when reception by the means is possible And means.

  According to a third aspect of the present invention, in the invention according to the second aspect, the storage control unit controls the storage unit to store the determination result by the first determination unit or the second determination unit, and the display The means is characterized in that the display reflects the judgment result stored by the storage control means.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the display means does not receive a broadcast on the channel received by the receiving means by the return means. When possible, the display by the display means is performed.

  The invention according to claim 5 is the invention according to any one of claims 2 to 4, further comprising electronic program guide acquisition means for acquiring an electronic program guide, wherein the display means is configured to perform the second determination. A program guide corresponding to the other channel is further displayed from the electronic program guide based on the determination result by the means.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the reception deterioration of the broadcast wave by the reception deterioration determining means is BER (Bit Error rate), PER (Packet Error Rate). , It is characterized in that it is determined by any one of RSSI (Received Signal Strength Indicator) or C / N ratio.

  The invention according to claim 7 is a broadcast receiving method, which stores a plurality of selectable broadcast waves as a channel list, and selects any one of the channels in the channel list stored in the storage step. Accordingly, the reception step for receiving the broadcast wave, the reception deterioration determination step for determining the deterioration of the reception of the broadcast wave during reception of the broadcast wave by the reception step, and the reception deterioration by the reception deterioration determination step. If it is determined, the reception control step for determining the reception status for other channels in the channel list, and the storage control for storing the result determined by the reception status determination step in association with the channel list. When the determination of the reception state in the step and the reception state determination step ends, the reception step A return step for returning to the channel that was received at the step, and a display step for displaying the reception status of other channels stored in the storage control step when the return step returns. To do.

  The invention according to claim 8 is a broadcast receiving program in which a computer stores a plurality of selectable broadcast waves as a channel list, and any channel of the channel list stored by the storage means is stored. By selecting, the reception means for receiving the broadcast wave, the reception deterioration judgment means for judging the deterioration of the reception of the broadcast wave during reception of the broadcast wave by the reception means, and the reception deterioration by the reception deterioration judgment means. If it is determined, the reception status determination means for determining the reception status for other channels in the channel list, and the storage control means for storing the result determined by the reception status determination means in association with the channel list When the reception state determination by the reception state determination unit is completed, the reception unit has received the reception state. Return means for returning to Yan'neru, when waking by the return means, characterized in that to function as a display unit, for displaying the reception status of other channels stored by said storage control means.

  By selecting any channel in the selectable channel list stored in the storage means, when receiving the broadcast wave, the reception deterioration determining means determines the reception deterioration of the broadcast wave, and this If the determination is that the broadcast wave has deteriorated, the reception status determination means determines the reception status of other channels in the channel list and displays the reception status on the display means. Even if the condition deteriorates, it is possible to easily know the channel that is normally received. Also, by displaying the broadcast reception status other than the channel being viewed, it is possible to immediately know that the video disturbance is not a failure of the broadcast receiving device, and the anxiety can be alleviated.

  FIG. 1 shows a functional configuration of the mobile phone 100 according to the first embodiment. The cellular phone 100 includes a control unit 1, ROM 2, RAM 3, flash memory 4, input unit 5, television antenna 24, television tuner module 20, video signal processing unit 30, display unit 25, audio output unit 40, speakers 43L and 43R. , Communication control unit 6, radio unit 7, transmitter unit 8, receiver unit 9, antenna 10, rechargeable battery 45, and address / data bus processing unit 50, which are electrically and electronically connected via a bus 51. Has been.

  The control unit 1 reads out an operation program and various application programs stored in the ROM 2 and the flash memory 4 and develops them on the RAM 3 as a work area to perform overall control of the mobile phone 100. Control signals transmitted from the control unit 1 to each functional unit, data transmitted from each functional unit to the control unit 1 or other functional units, are monitored by the address / data bus processing unit 50 via the bus 51 and controlled. Predetermined processing is executed in the unit 1 and other functional units. In particular, in the first embodiment, in cooperation with the program, based on the reception status of the television broadcast radio wave, automatically determine whether the broadcast is in a stopped state (broadcast suspended state) or out of broadcast range, A process of displaying the determination result on the display unit 25 and notifying the user is executed.

The flash memory 4 is an internal storage device composed of a nonvolatile semiconductor element. At the time of recording a television broadcast, the television broadcast data transmitted from the video signal processing unit 30 is recorded based on an instruction from the control unit 1.
The flash memory 4 stores EPG data 11 as an electronic program guide and a channel list 12 used when selecting a television broadcast.

  The EPG data 11 is a list showing the schedule of the television broadcast downloaded by the wireless unit 7 and the communication control unit 6 via a network (not shown). For example, the EPG data 11 includes the broadcast date / time, channel, program name, genre, and the like. Recorded data. Note that the EPG may be obtained from EPG data included in a television broadcast carrier wave.

  The channel list 12 is a data table that defines the correspondence between channels and physical channels and the correspondence between these channels and the keys of the input unit 5. FIG. 2 shows an example of the channel list 12. The channel list includes a remote control ID recording area 60a, a channel recording area 60b, a broadcaster name recording area 60c, a network ID recording area 60d, a physical channel recording area 60e, a broadcast suspension flag area 61, and an out-of-service flag area 62. .

  The remote control ID recording area 60a is an area for recording an ID assigned to a dial key or the like of the input unit 5. The channel recording area 60b is an area for recording a channel number indicating each broadcast frequency band. The broadcaster name recording area 60c is an area for recording the name of the broadcaster for each channel. The network ID recording area 60d is an area for recording a NIT (Network Information Table). The NIT is information for associating a modulation frequency and other transmission path information with a broadcast program, and includes information relating to a transmitting network such as a channel number, a modulation method, and a card interval. This data is data carried by the broadcast wave even when the broadcast by the broadcaster is in a suspended state. The physical channel recording area 60e is an area for recording a physical channel. The broadcast pause flag area 61 is an area in which a flag is set (ON: 0 → 1) when it is determined that the broadcast is paused from the reception status or the like. Similarly, the out-of-range flag area 62 is an area in which a flag is set when it is determined that the broadcast radio wave is out of the range from the reception status or the like.

  Returning to FIG. 1, the input unit 5 is a user interface including various operation input keys such as dial keys and function keys. On the RAM 3, a table showing commands corresponding to instruction signals transmitted by pressing the respective keys is developed in advance, and the control unit 1 understands and executes the instructions from the user while referring to the tables. It has become. Television broadcast reception settings, EPG acquisition operations, and the like are also performed via the input unit 5.

  The television tuner module 20 is a functional unit that extracts television broadcast terrestrial waves from radio waves received by the television antenna 24, and includes a tuner 21, an OFDM (Orthogonal Frequency Division Multiplexing) demodulation circuit 22, and a degradation determination unit 23. The tuner 21 extracts a television broadcast terrestrial wave (carrier wave) of a predetermined frequency band, which is OFDM-modulated, from the radio wave received by the television antenna 24, and transmits it to the OFDM demodulation circuit 22. The OFDM demodulation circuit 22 demodulates the supplied carrier wave and transmits it to the video signal processing unit 30 as electronic data. In addition, a television broadcast terrestrial broadcast includes a program such as a PAT (Program Association Table) and a PMT (Program Map Table), and its frequency band. Data defining the relationship is included. Based on these data, the control unit 1 controls the TV tuner module 20 and the video signal processing unit 30.

  The video signal processing unit 30 is a functional unit that combines the electronic data encoded in the MPEG2-TS format supplied from the TV tuner module 20 and supplies it to the display unit 25, and includes a TS decoder 31 and a graphic decoder 32. . The TS decoder 31 transmits the electronic data transmitted from the OFDM demodulation circuit 22 to the graphic decoder 32 as compressed digital information having a transport stream configuration. The graphic decoder 32 acquires video / audio / character data by demodulating the encoded digital information. Thereafter, these data are supplied to the display unit 25 and the audio output unit 40, respectively, according to instructions from the control unit 1.

  The degradation determination unit 23 is a functional unit that performs degradation determination processing for diagnosing reception degradation. The deterioration determination unit 23 acquires BER (Bit Error rate) as information from the tuner 21, determines the degree of deterioration of reception based on the BER value, and outputs it to the control unit 1. Specifically, the BER value is acquired several times within a certain time, and the number of times that the deterioration is determined within the time is counted. When this number exceeds the predetermined number, the channel selection is automatically performed for the channel list stored automatically.

The deterioration determination process will be described with reference to the flowchart shown in FIG. The following processing is executed according to instructions from the control unit 1 in accordance with instructions from the program.
First, in step S102, the control unit 1 determines whether it is a reception sensitivity acquisition timing. When determining that it is the reception timing, the control unit 1 proceeds to step S103 (step S102: YES). Conversely, when the control unit 1 determines that it is not the reception sensitivity acquisition timing, it exits this flow.

In step S103, the control unit 1 starts measuring time with a timer (not shown).
In step S104, the control unit 1 determines whether or not deterioration is detected in the currently received channel. That is, the control unit 1 determines whether or not to detect an error in the digital broadcast radio wave from the tuner 21. When determining that an error has been detected, the control unit 1 proceeds to step S105 (step S104: YES). Conversely, if the control unit 1 determines that no error is detected, the control unit 1 proceeds to step S108 (step S104: NO). In step S108, the control unit 1 monitors the time when the time measurement is started in step S103, and determines whether or not a predetermined time has elapsed. When determining that the predetermined time has elapsed, the control unit 1 proceeds to step S109 (step S108: YES). Conversely, when it is determined that the predetermined time has not elapsed, the process returns to step S104, and the detection of the error signal is monitored again (step S108: NO).

  In step S105, the control unit 1 counts the detection of the error signal in step S104 as a number of deterioration by a counter (not shown). Thereafter, in step S106, the control unit 1 monitors the time when the time measurement is started in step S103, and determines whether or not a predetermined time has elapsed. If it is determined that the predetermined time has elapsed, the process proceeds to step S107 (step S106: YES). On the other hand, when determining that it is still within the predetermined time, the control unit 1 returns to step S104 (step S106: NO).

In step S107, the control unit 1 determines whether or not the number of error signals counted in step S104 exceeds a predetermined number set in advance. When determining that the number of deteriorations counted in step S105 exceeds a predetermined number, the control unit 1 proceeds to step S201 described later (step S107: YES). When determining that the number of deterioration does not exceed the predetermined number, the control unit 1 proceeds to step S109.
In step S109, the control unit 1 resets the timer that started timing in step S103 and the number of deteriorations counted in step S105, and returns to the state before executing the deterioration determination process. That is, the control unit 1 determines that the reception sensitivity is good.

  Note that the degradation determination unit 23 is not limited to a configuration that determines reception degradation depending only on the BER, but includes a PER (Packet Error Rate) that is a reception error rate in packet data units, and an RSSI that indicates the strength of the reception signal. It is good also as a structure which determines based on (Received Signal Strength Indicator) or C / N ratio (Carrier to Noise Ratio) which is a ratio of a carrier wave and noise.

  The video signal processing unit 30 is a functional unit that decodes the electronic data encoded in the MPEG2-TS system supplied from the television tuner module 20 and supplies the decoded data to the display unit 25. A TS decoder 31 and a graphic decoder 32 are provided. The TS decoder 31 transmits the electronic data transmitted from the OFDM demodulation circuit 22 to the graphic decoder 32 as compressed digital information having a transport stream configuration. The graphic decoder 32 acquires video / audio / character data by demodulating the encoded digital information. Thereafter, these data are supplied to the display unit 25 and the audio output unit 40, respectively, according to instructions from the control unit 1.

  The display unit 25 is a functional unit that displays a television image based on the video data supplied from the video signal processing unit 30, and includes a TFT (Thin Film Transistor) and an organic EL (Electro-Luminescence) element. It consists of a small FPD (Flat Panel Display). Various images and videos when various functions including a television broadcast receiving function are executed are displayed.

  The audio output unit 40 outputs a ringing tone based on television broadcast audio data supplied from the TV tuner module 20 when the television broadcast receiving function is executed, or based on an instruction from the control unit 1 when the communication / call function is executed. And a sound source LSI 41 and an AMP 42. The tone generator LSI 41 generates analog audio data based on the various audio data described above, and outputs the analog audio data to the AMP 42. The analog audio signal amplified by the AMP 42 is output as audio through the speakers 43L and 43R.

  The communication control unit 6 is a functional unit that controls a call / communication function according to an instruction from the control unit 1, and includes a communication data processing unit 13 and an audio interface 14. The communication data processing unit 13 decodes received data received by the wireless unit 7 via the antenna 10 during reception, and encodes transmission data transmitted from the wireless unit 7 during transmission. More specifically, it includes a CELP (Code-Excited Linear Prediction) vocoder, an audio composite processing circuit, a packet data generation circuit, and the like. The audio interface 14 outputs a voice based on the reception data included in the reception data decoded by the communication data processing unit 13 from the reception unit 9 or a user's voice input from the transmission unit 8 as a digital signal. Or convert to sent data.

  Further, as mentioned in the description of the EPG data 11 described above, the mobile phone 100 has a communication program (such as a Web browser) that enables communication with a network environment such as the Internet, and a network communication function based on this program. Thus, the EPG can be downloaded from the server machine existing on the network. A list of downloaded EPGs is displayed on the display unit 25, and the user can reserve a program desired to be viewed via the input unit 5.

  Next, processing performed in the mobile phone 100 will be described with reference to flowcharts shown in FIGS. The following processing is performed by the control unit 1 in accordance with the instructions of the program.

  In step S101, the control unit 1 determines the reception state of the television broadcast by the above-described “deterioration determination process” (see FIG. 3). When the controller 1 determines that the number of deteriorations counted for a predetermined time in the “deterioration determination process” exceeds a predetermined number (step S107 in FIG. 3: YES), the control unit 1 proceeds to step S201.

In step S201, the control unit 1 reads the physical channel recording area 60e of the channel list 12.
Next, in step S202, the control unit 1 determines whether the physical channel recorded in the channel list is other than the channel currently received. When determining that no other physical channel is recorded in the physical channel recording area 60e, the control unit 1 proceeds to step S209 (NO in step S202). In step S209, the control unit 1 determines that the location where the mobile phone 100 is currently located is outside the television broadcasting range, sets a flag in the out-of-range flag area 62 of the channel list 12, and updates the channel list. That is, there is no physical channel recorded on the channel list 12 other than the physical channel currently receiving the television broadcast, and the reception state of the physical channel is in a deteriorated state by the “deterioration determination process” in step S101. Therefore, it can be determined that the mobile phone 100 is located outside the television broadcast reception area.
Conversely, when the control unit 1 determines that another physical channel is recorded, the process proceeds to step S203.

  In step S203, the control unit 1 stops outputting video and audio. That is, the control unit 1 starts executing the reception state detection process for all other physical channels recorded in the physical channel recording area 60e.

  In step S204, the controller 1 reads the frequency of one physical channel from the other physical channels recorded in the physical channel recording area 60e from the channel list 12, and outputs the frequency to the tuner 21 for setting.

In step S205, the control unit 1 determines whether there is a broadcast radio wave synchronized with the frequency. Specifically, it is detected whether or not the tuner 21 can detect a signal that locks to the frequency set in step S204 for a predetermined time or more. When the control unit 1 determines that the carrier lock is performed (that is, the synchronized broadcast radio wave is received for a certain period of time: synchronization is established), the process proceeds to step S206 (step S205: YES).
On the other hand, when determining that the carrier is not locked, the control unit 1 proceeds to step S209 (step S205: NO). In step S209, the control unit 1 determines that the location where the mobile phone 100 is currently located is outside the television broadcasting range, sets a flag in the out-of-range flag area 62 of the channel list 12, and updates the channel list. Thereafter, the process proceeds to step S210.

In step S206, the control unit 1 determines whether or not NIT and / or PMT can be detected from a television broadcast radio wave having a frequency that can be carrier-locked, that is, a broadcaster in the frequency band broadcasts. Judgment whether or not there is.
When the control unit 1 can detect the NIT and / or the PMT, that is, determines that the broadcast is being performed, the control unit 1 proceeds to step S207 (step S206: YES).
Conversely, when it is determined that NIT and / or PMT cannot be detected, that is, the broadcaster in the frequency band is not broadcasting, the process proceeds to step S208 (NO in step S206).

  In step S208, the control unit 1 sets a flag in the corresponding area of the broadcast suspension flag area 61 of the channel list 12 and updates the channel list. Thereafter, the process proceeds to step S210.

  In step S207, the control unit 1 extracts the acquired NIT and / or PMT information, and records (updates) the current physical channel and NIT in association with the channel and the broadcaster name in the channel list 12. .

In step S210, the control unit 1 refers to the physical channel recording area 60e of the channel list 12 and determines whether there is still a physical channel that has not been determined whether synchronization has been established. When determining that there is, the control unit 1 returns to step S204 (step S210: YES). In other words, this is for checking a physical channel that has not yet been determined whether or not synchronization has been established.
Conversely, when determining that there is no control, the control unit 1 proceeds to step S211 (step S210: NO).

In step S211, the control unit 1 sets the frequency of the physical channel on which the “deterioration determination process” in step S101 has been performed in the tuner 21, and determines whether the physical channel is receivable (can be selected). . Specifically, the determination is made based on the BER and the like in the deterioration determination unit 23. That is, it is for determining whether or not it is possible to return to the state before starting the reception state detection process. When determining that the physical channel can be received in step S101, the control unit 1 proceeds to step S212 (step S211: YES), and causes the video signal processing unit 30 to perform data on the physical channel on which the “deterioration determination process” has been performed. And a return process for restarting the video display on the display unit 25 and the audio output from the audio output unit 40 is performed.
Conversely, when it is determined that the state before the reception state detection process cannot be restored, the process proceeds to step S213 (NO in step S213).

  In step S213, the control unit 1 refers to the channel list 12 and determines which of the broadcast suspension flag area 61 and the out-of-service flag area 62 of the first physical channel that has undergone the deterioration determination process in step S101 is flagged. I do. If the flag is set in the broadcast suspension flag area 61, the process proceeds to step S214 (step S213: “broadcast suspension”). Conversely, if it is determined that the flag is set in the out-of-service flag area 62, the process proceeds to step S216 (step S213: “out of service”).

  In step S214, the control unit 1 acquires flag information of the broadcast suspension flag area 61 and the out-of-service flag area 62 of other physical channels on the channel list 12. Next, in step S215, the control unit 1 reads the guide image data stored in the ROM 2 and / or the flash memory 4, and indicates that it is out of service area on the display unit 25 as shown in FIG. 6B. A guide screen and a screen for guiding the reception status of all physical channels registered in the channel list 12 are displayed.

  On the other hand, in step S216, the control unit 1 acquires the flag information of the broadcast suspension flag region 61 and the out-of-service flag region 62 of other physical channels on the channel list 12. Next, in step S217, the control unit 1 reads the guide image data stored in the ROM 2 and / or the flash memory 4, and indicates that it is out of service area on the display unit 25 as shown in FIG. A guide screen and a screen for guiding the reception status of all physical channels registered in the channel list 12 are displayed.

  In step S218, the control unit 1 refers to the channel list 12 and determines whether there is a physical channel that can be received (can be selected). That is, it is determined whether or not there is a physical channel for which no flag is set in either the broadcast suspension flag area 61 or the out-of-service flag area 62. When it is determined that the control unit 1 is present, the process proceeds to step S219 (step S218: YES). Conversely, if it is determined that the control unit 1 is not present, the process exits this flow and ends (NO in step S218).

In step S219, the control unit 1 refers to the EPG data 11 stored in the flash memory 4, and acquires program information corresponding to the receivable (channel selectable) physical channel determined to be in step S218. That is, the physical channel whose association has been updated in step S207 (see FIG. 4).
Thereafter, in step S220, the control unit 1 performs a process of further displaying the program information on the display unit 25 as shown in FIG.

  As described above, according to the mobile phone 100, the deterioration determination unit 23 determines the deterioration of the reception of the broadcast wave during reception of the broadcast wave, and when this determination determines the deterioration of the broadcast wave, Since the reception state of the physical channel is determined and the reception state is displayed on the display unit 25, the user can immediately know the (physical) channel that can be normally received. Even if the reception status of the channel being viewed deteriorates, the user can easily know the channel that is normally received without repeatedly searching for a channel that suitably displays the image by repeatedly operating the channel switch or the like. Can do. Also, by displaying the broadcast reception status other than the channel being viewed, it is possible to immediately know that the video disturbance is not a failure of the broadcast receiving device, and the anxiety can be alleviated.

  In addition, since the program content of the channel normally received from the EPG data 11 is extracted and the content of the program is displayed on the display unit 25, the channel that normally displays the video according to the user's preference is intuitively known. be able to.

3 is a block diagram showing a functional configuration of mobile phone 100. FIG. 4 is a schematic diagram illustrating an example of a channel list of the mobile phone 100. FIG. FIG. 5 is a flowchart showing a procedure of deterioration detection processing performed in the mobile phone 100. FIG. 10 is a flowchart showing a processing procedure for determining a reception state of a physical channel registered in a channel list performed by the mobile phone 100. FIG. 10 is a flowchart showing a processing procedure for determining a reception state of a physical channel registered in a channel list performed by the mobile phone 100. It is the schematic diagram which showed the example of the guidance screen of the reception state displayed on a display part. It is the schematic diagram which showed the example which displayed the guidance screen and electronic program guide of the reception state displayed on a display part.

Explanation of symbols

1 Control unit 2 ROM
3 RAM
4 Flash memory 5 Input unit 6 Communication control unit 7 Radio unit 8 Transmission unit 9 Reception unit 10 Antenna 11 EPG data 12 Channel list 20 TV tuner module 21 Tuner 22 OFDM demodulation circuit 23 Degradation determination unit 30 Video signal processing unit 31 TS decoder 32 Graphic decoder 40 Audio output unit 41 Sound source LSI
42 AMP
43L, 43R Speaker 45 Rechargeable battery 50 Address / data bus processor 51 Bus 60a Remote control ID recording area 60b Channel recording area 60c Broadcaster name recording area 60d Network ID recording area 60e Physical channel recording area 61 Broadcast pause flag area 62 Out-of-service flag Area 100 mobile phone

Claims (8)

Storage means for storing a plurality of selectable broadcast waves as a channel list;
Receiving means for receiving a broadcast wave by selecting any channel in the channel list stored in the storage means;
A reception deterioration determination means for determining deterioration of reception of the broadcast wave during reception of the broadcast wave by the reception means;
When it is determined that the reception is deteriorated by the reception deterioration determination means, reception state determination means for determining the reception state for other channels in the channel list;
Storage control means for controlling to store the result determined by the reception state determination means in the storage means in association with the channel list;
Upon completion of the reception state determination by the reception state determination unit, return means for returning to the channel received by the reception unit;
Display means for displaying the reception status of other channels stored by the storage control means when returned by the return means;
A broadcast receiving apparatus comprising: The reception state determination means includes first determination means for determining whether or not reception of the channel is possible;
When reception on the channel is possible by the first determination means, it is determined whether NIT (Network Information Table) and / or PMT (Program Packet Table) data can be acquired from the received broadcast wave. The broadcast receiving apparatus according to claim 1, further comprising: a second determination unit configured to perform the determination. The storage control unit controls the storage unit to store the determination result by the first determination unit or the second determination unit;
The broadcast receiving apparatus according to claim 2, wherein the display unit performs display reflecting the determination result stored by the storage control unit.   4. The display unit according to claim 1, wherein the display unit performs display by the display unit when it is impossible to receive broadcast on the channel received by the receiving unit by the return unit. The broadcast receiving device according to one item. It further comprises electronic program guide acquisition means for acquiring an electronic program guide,
5. The display unit according to claim 2, wherein the display unit further displays a program guide corresponding to the other channel from the electronic program guide based on a determination result by the second determination unit. The broadcast receiving device according to item.   The reception deterioration of the broadcast wave by the reception deterioration determining means is any one of BER (Bit Error rate), PER (Packet Error Rate), RSSI (Received Signal Strength Indicator), and C / N (Carrier to Noise Ratio) ratio. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is determined. A storage step of storing a plurality of selectable broadcast waves as a channel list;
A receiving step of receiving a broadcast wave by selecting any channel in the channel list stored in the storing step;
A reception deterioration determination step for determining deterioration of reception of the broadcast wave during reception of the broadcast wave by the reception step;
When it is determined that the reception is deteriorated by the reception deterioration determination step, a reception state determination step of determining a reception state for other channels in the channel list;
A storage control step of storing the result determined in the reception state determination step in association with the channel list;
When the determination of the reception state by the reception state determination step ends, a return step for returning to the channel that was received in the reception step;
A display step for displaying the reception status of other channels stored in the storage control step when returning by the return step;
A broadcast receiving method comprising: Computer
Storage means for storing a plurality of selectable broadcast waves as a channel list;
Receiving means for receiving a broadcast wave by selecting any channel in the channel list stored by the storage means;
A reception deterioration judging means for judging deterioration of reception of the broadcast wave during reception of the broadcast wave by the receiving means;
When it is determined by the reception deterioration determining means that the reception is deteriorated, a reception state determining means for determining a reception state for other channels in the channel list;
Storage control means for storing the result determined by the reception state determining means in association with the channel list;
When the determination of the reception state by the reception state determination unit is completed, a return unit that returns to the channel received by the reception unit;
Display means for displaying the reception status of other channels stored by the storage control means when returned by the return means;
A broadcast receiving program characterized by functioning as:

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