JP2006100953A - Channel preset method and station selection method in mobile reception - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means enabling a plurality of broadcast stations and a plurality of services to be easily switched in the reception of digital broadcast in the same sense at all times. <P>SOLUTION: A broadcast receiver includes: a memory 7 for storing station selection key numbers and a plurality of broadcast stations preset to keys; and a control section 6, and the control section 6 carries out receptible judgment and thereafter rewrites contents of the memory 7 so that reception broadcast stations in the judged area are preset to station selection keys to which broadcast stations in the same chain are preset. Every time the station selection key is depressed, the control section 6 switches the plurality of broadcast stations and the plurality of services on the basis of preset information in the memory 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile digital television broadcast receiver.

  In recent years, digital terrestrial broadcasting has started. For this broadcast, a broadcast method called Orthogonal Frequency Division Multiplexing (“Orthogonal Frequency Division Multiplexing”, hereinafter “OFDM”), which is resistant to interference of received waves, is used. This method is suitable for television reception in a moving body whose reception state changes from moment to moment.

  Thanks to this technology, users can enjoy watching TV with clear image quality even in the car. Also, since digital broadcasting allows multi-channel broadcasting compared to conventional analog broadcasting, users can enjoy high quality and quantity of digital broadcasting that is close to home television (hereinafter “fixed receiver”) even in the car. The program can be received.

  However, due to the difference in environment between a moving car and a non-moving house, the following two points are not the same as a home TV.

  First, since it has become possible to receive a multi-channel service in the car, how to select a desired program from among many programs.

  Conventionally, in a fixed receiver, a channel selection method using an electric program guide (hereinafter referred to as “EPG”) has already become widespread as a channel selection means in multi-channel broadcasting. This technology is very easy to use because it allows operations such as channel selection while looking at the same screen as the latte column of a newspaper.

  However, in a place where there is not enough space for a TV such as in a car, the screen size must be small, so the information of each program on the EPG becomes too small and difficult to select. That is, an in-vehicle television is desired to have an invention of a channel selection method suitable for selecting multi-channel broadcasting in a vehicle.

  Second, because the car moves, there are many opportunities to cross the terrestrial broadcast area. In terrestrial waves, the reach of radio waves broadcast from one broadcasting station is limited. A range covered by one broadcasting station is called a broadcasting area. In general, each broadcast area uses different physical channels. Therefore, the receiver performs channel preset for each broadcast area. For fixed receivers, presets are made during installation. Since the fixed receiver has very few opportunities to change its position, it is hardly necessary to perform presetting once preset. The physical channel refers to the actual frequency of the broadcast wave or a number corresponding to the actual frequency.

  However, in the case of a car, in order to move, the preset must be redone every time the area is crossed.

  The fact that the presets have to be repeated frequently causes the following inconvenience. In each broadcast area, not only the physical channels are different, but also the broadcast contents are different. For this reason, when presetting is performed, the program being watched often moves to another channel. That is, in order to continuously view the same program on the in-vehicle television, every time the area is crossed, the program that has been viewed up to now must be searched again.

  As means for solving the above-mentioned points, a broadcast station that can receive a broadcast station in each broadcast area and a database that stores its channel number and frequency are built in advance, and a broadcast station that can be received in the area together with position information from GPS In particular, an invention is disclosed in which a preset broadcasting station or a broadcasting station of the same series is preset to the same channel selection key even if the reception area changes (see Patent Document 1).

  The following is an overview of the contents of Patent Document 1 along with the channel preset technology in digital TV.

  The channel preset function in the broadcast receiver is a broadcast station that can be received by each of a plurality of keys (hereinafter referred to as “channel selection key”) of a channel selection means such as a remote controller that can be selected by the user for the broadcast receiver. This function automatically assigns physical channels. That is, after operating this function, the user can select a desired broadcast station simply by operating the channel selection key. The operation of the tuning key is usually to depress the tuning key.

  In the conventional analog television broadcasting, a function has been realized in which the receiver selects a physical channel in order and automatically assigns a channel capable of demodulating a video signal to a channel number selectable by the user. In this method, a demodulated physical channel is assigned to a user-selectable channel number according to a rule determined in advance by each manufacturer of the broadcast receiver.

  Patent Document 1 uses a database having position information from GPS, a broadcast station for each broadcast area, and its affiliate information. When the broadcast area changes due to traveling, the same selection as before is made based on the information of affiliate stations in the database. A technique for assigning to a station key is disclosed. By doing in this way, the complexity of a preset and the burden at the time of channel selection of the user in a vehicle-mounted television can be reduced.

  In digital broadcasting, various additional information other than video and audio signals can be included in a broadcast wave. For this reason, information on the number of the tuning key that the broadcaster wants to set his / her broadcast at the user's broadcast receiver is superimposed on the broadcast wave.

This information is information called a remote control key ID (remote_control_key_id). For example, if the remote control key ID of the A broadcast station is “1”, it means that the A broadcast station is assigned to the tuning key “1”. A receiver that performs channel preset according to the remote control key ID is assigned to a channel selection key of “1” regardless of the physical channel number of the broadcasting station A, regardless of the manufacturer's receiver. Current home digital broadcast receivers often adopt a channel preset method using a remote control key ID.
Japanese Patent Laid-Open No. 11-331717

  As described above, in order to enjoy terrestrial digital broadcasting on a vehicle-mounted television, there is room for a device that is not available in a fixed receiver in terms of channel selection operation from multiple channels and channel preset. The problem to be solved by the present invention relates to these points.

  That is, the present invention provides a method or apparatus for selecting a station with a simple operation in a limited environment in a car and continuously watching the same program even if presets are frequently performed.

  That is, in order to be able to select a channel with a simple operation in mobile reception of a car or the like, it is necessary to satisfy the demand that it is desirable to reduce the number of keys for user operation as much as possible. That is, when there are many receivable broadcasting stations, there is a problem that the channel selection key is insufficient in the conventional channel preset method.

  Furthermore, in a digital broadcast receiver, if a preset is performed according to the remote control key ID even when moving to another area, a broadcasting station of the same series may be assigned to another tuning key. It is very inconvenient when it is necessary to remember again which broadcast station has been assigned, and to continue watching the same program.

  Also, in digital broadcasting, a single broadcasting station may broadcast a plurality of services at the same time, and means for switching between the plurality of services are not prepared for the tuning keys for presetting. There is a problem that operability is lowered.

  The present invention solves such a problem, and all receivable broadcasting stations can be assigned to a limited number of tuning keys, and a plurality of the same series can be easily moved even if the area is moved. The purpose is to select a broadcasting station and to switch among a plurality of services broadcast simultaneously by the broadcasting station.

  The present invention provides means for presetting broadcast stations determined to be receivable at the time of a channel search to a single tuning key for all broadcast stations of the same series.

  Since the digital broadcast receiver of the present invention can preset a plurality of broadcasting stations of the same series to one tuning key, it is possible to preset more broadcasting stations than the number of tuning keys. In addition, since it is possible to select a broadcasting station of the same series and switch a service by a simple operation of pressing the same channel selection key, there is an advantage that user operability is improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a digital broadcast receiver according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an antenna that receives broadcast radio waves, and 2 denotes a tuner unit that selects a desired transmission channel from the received broadcast radio waves. The tuner unit 2 outputs an RF signal SRF.

  Reference numeral 3 denotes an OFDM demodulator that extracts a digital signal. The OFDM demodulator 3 demodulates the input RF signal SRF and outputs a transport stream TS.

  An MPEG decoding unit 4 decodes the video signal and the audio signal. The MPEG decoding unit 4 decodes the input transport stream TS and outputs a video signal SV and an audio signal SA.

  Reference numeral 5 denotes an operation unit for giving an instruction to the receiver, and a key or a touch panel attached to the receiver itself or a remote controller for remote operation is used.

  A control unit 6 controls the entire receiver.

  A preset memory 7 stores a tuning key number, a series ID, a broadcasting station name assigned to each tuning key, a service number of each broadcasting station, and physical channel information.

  An output OCC corresponding to the operated key is sent from the operation unit 5 to the control unit 6 to tell which operation the user has selected.

  The control unit 6 controls the entire device by sending commands to the tuner unit 2, OFDM demodulation unit 3, MPEG decoding unit 4, and preset memory 7 and receiving status reports.

  A display unit 8 outputs the decoded video. The display unit 8 displays the input video signal SV as a video. As the display unit 8, a device that can display an image, such as a CRT, a liquid crystal display device, a plasma display device, or other flat display devices, can be used.

  Reference numeral 9 denotes an audio output unit that outputs decoded audio. The audio output unit 9 outputs the input audio signal SA as audio. The audio output unit 9 is generally a speaker device, but is not limited thereto.

  Next, preset processing according to the embodiment of the present invention will be described with reference to the flowcharts of FIGS. 1 and 2 and FIGS. 3 to 5.

  In the present embodiment, the preset memory of FIG. 1 has two areas (hereinafter also referred to as “banks”). A bank is a division for memory management and does not need to be physically divided into two areas. A conceptual diagram of the preset memory 7 having such two banks is shown in FIG. In order to distinguish between the two banks, one is a “basic area 31” and the other is a “movement area 32”.

  The operation unit 5 has means for selecting and operating each of these two banks. These are referred to as “basic area scan” and “movement area scan”, respectively. The basic area scan is prepared mainly for presetting in the living area, and the moving area scan is prepared for presetting in other areas.

The basic area scanning process will be described. The user instructs the control unit 6 to start basic area scanning from the operation unit 5 of the receiver (S1 in FIG. 2). Note that S1 in FIG. 2 is described as “search”, but in this specification, “scan” is treated as consent.

  The control unit 6 sequentially instructs the tuner unit 2 to select a channel, and the tuner unit 2 receives a broadcast radio wave from the antenna 1 and outputs an RF signal (S2 in FIG. 2). At this time, it is a straightforward way to select a channel with a smaller physical channel number, but there is no particular limitation.

  The RF signal obtained from the tuner unit 2 is demodulated into a digital signal by the OFDM demodulation unit 3. At this time, the OFDM demodulator determines whether or not the obtained RF signal is a digital broadcast (S3 in FIG. 2). If it is not a digital signal, the following processing is skipped, and the next physical channel is selected (NO branch at S3 in FIG. 2).

  If the RF signal obtained from the tuner unit 2 is digital broadcasting, a transport stream TS is obtained (YES branch at S3 in FIG. 2). The transport stream TS includes not only video and audio information but also additional information related to a program multiplexed in the transport stream. The control unit 6 receives the additional information and, from the additional information, information such as the name of the broadcasting station that broadcasts the transport stream, the remote control key ID, and the sequence ID (affiliation_id) that defines the sequence to which the broadcasting station belongs by a number. Pull out. If it is not digital, the subsequent processing is skipped (NO branch in S3 of FIG. 2).

  Next, the control unit 6 determines whether the current scan is a basic area scan or a movement area scan (S4 in FIG. 2). Since this is a basic area scan, the process proceeds to YES (YES in S4 in FIG. 2).

  And the control part 6 records the information regarding the broadcast station currently received in a basic area based on remote control key ID (S7 of FIG. 2).

  Next, it is determined whether or not the selected physical channel is the last physical channel to be searched in the preset process (S8 in FIG. 2). If not, the process moves to the next physical channel (NO in S8 in FIG. 2). If it is the last, the process ends (S8 in FIG. 2 is YES).

  As a result of being preset by the above operation, the basic area 31 is preset as shown in FIG. In the basic area 31 of FIG. 3, the A broadcast is assigned to the channel selection key “1”. This is because the remote control key ID of A broadcast was “4”. More specifically, three services of “011”, “012”, and “013” of the A broadcast are assigned to the channel selection key “1”.

  Here, “service” refers to a series of scheduled broadcast programs organized by a broadcasting station, and is also referred to as “organization channel”. In other words, the A broadcast means that three programs can be broadcast at the same time using the band of the physical channel “13”. In the case of digital broadcasting, since information is divided and transmitted in units of packets, such multiplex transmission is possible.

  Each broadcasting station determines how many services are provided for one physical channel. In the case of A broadcast, preparations are made so that three programs can be transmitted simultaneously. These services can be used independently or together. That is, one program can be transmitted using three services, and three different programs can be transmitted simultaneously.

  The point that these three services can be sequentially selected by the channel selection key “1” will be described in detail in the description of FIG.

  Note that after presetting, the user may be able to edit the assignment of the broadcasting station to the tuning key as desired.

  Next, the movement area scan will be described. FIG. 4 shows the relationship between the broadcast area in YY prefecture and the broadcast area in ZZ prefecture. Now, assume that the user has a main sphere of life in YY prefecture, and the basic area scan is performed as described above in YY prefecture to obtain the basic area 31 of FIG.

  There is a limit to the range in which a broadcast wave from one broadcasting station can be received, and the inside of the limit is called a fringe area. The portion 30 where the broadcasting area of YY prefecture and the fringe area of the broadcasting area of ZZ overlap in FIG. 4 is an area where both broadcasts can be received.

  It is assumed that the user is currently traveling on the point P2 in a car and has performed a movement area scan. The user instructs the control unit 6 to start moving area scanning from the operation unit 5 of the receiver. When the movement area scan is performed, the channel selection key and the sequence ID area in the basic area 31 are copied to the movement area 32. Although not clearly shown in the flow of FIG. 2, in the case of movement area scanning, this processing is performed in step S1. The area to be copied is an area indicated by 35 in FIG. This copy process may be performed immediately after the basic area scan is performed.

  The control unit 6 sequentially instructs the tuner unit 2 to select a channel, and the tuner unit 2 receives a broadcast radio wave from the antenna 1 and outputs an RF signal (S2 in FIG. 2).

  The RF signal obtained from the tuner unit 2 is demodulated into a digital signal by the OFDM demodulation unit 3. At this time, the OFDM demodulator determines whether or not the obtained RF signal is a digital broadcast (S3 in FIG. 2). If it is not a digital signal, the following processing is skipped, and the next physical channel is selected (NO branch at S3 in FIG. 2).

  If the RF signal obtained from the tuner unit 2 is digital broadcasting, a transport stream TS is obtained (YES branch at S3 in FIG. 2). The transport stream TS includes not only video and audio information but also additional information related to a program multiplexed in the transport stream. The control unit 6 receives the additional information and extracts information such as the name of the broadcasting station that broadcasts the transport stream, the remote control key ID, and the series ID that defines the series to which the broadcasting station belongs from the additional information.

  Next, the control unit 6 determines whether the current scan is a basic area scan or a movement area scan (S4 in FIG. 2). Since this is a movement area scan, the process proceeds to NO (YES in S4 in FIG. 2).

  Then, the control unit 6 refers to the movement area 32 of the preset memory 7 and searches for a channel selection key having the same sequence ID as the acquired sequence ID (S5 in FIG. 2). If there is a channel selection key having the same sequence ID as the acquired sequence ID, the broadcast station name, service, physical channel, etc. are recorded for the channel selection key (S6 in FIG. 2).

  If there is no same series ID, recording is performed based on the remote control key ID (S7 in FIG. 2).

  Finally, it is determined whether or not the selected physical channel is the last physical channel to be searched in the preset process (S8 in FIG. 2). If not, the process moves to the next physical channel (NO in S8 in FIG. 2). If it is the last, the process ends (S8 in FIG. 2 is YES).

  More specifically, it is assumed that the movement area scan is started and the A broadcast of the physical channel 13, which is one of the broadcasting stations in YY prefecture, is received. Since the series ID of A broadcast is “4”, it is assigned to the channel selection key “1” of the moving area 32 to which the same series ID is related. That is, in the basic area scan, the A broadcast is preset based on the remote control key ID, but in the movement area scan, it is preset based on the sequence ID.

  Next, the B broadcast of the physical channel 15 is received and similarly assigned to the channel selection key “2”. When the O broadcast of the physical channel 16 is received, the channel selection key “1” is assigned based on the sequence ID “4”. Here, the A broadcast is already assigned to the channel selection key “1”, but the present application further improves the convenience of the user by allowing the duplicate assignment of the O broadcast.

  FIG. 5 shows the result of the movement area scan by the movement of the car. 5A shows the result of the movement area by the movement area scan at the P1 point, FIG. 5B shows the result at the P2 point, and FIG. 5C shows the result at the P3 point. Even if the contents of the movement area are rewritten by the movement scan in this way, the contents of the basic area are maintained as they are. Since the contents of the basic area do not change, the relationship between the channel selection key number copied from the basic area and the sequence ID is maintained at any point from P1 to P3.

  That is, in FIG. 5C, the O broadcast is assigned to the channel selection key “1”, but this is not an assignment based on the remote control key ID but an assignment based on the sequence ID. Therefore, the remote control key ID of O broadcast preset in the movement area may not be “1”.

  As described above, two banks, the basic area and the movement area, are stored in the memory, and the relationship between the channel selection key number and the series ID is reflected from the basic area to the movement area, so that the preset at the movement destination Regardless of the situation, it is possible to restore the preset state of the main living area simply by switching the bank.

  As a preset method when a broadcast station belonging to a plurality of affiliates called a cross-net station can be received, if it is discovered by “basic area scan”, the primary affiliate ID of this broadcast station is made to correspond to the tuning key. In the case where the “movement area scan” is performed at the movement destination, a method of allocating the broadcast station to all the tuning keys corresponding to these sequences can be considered. In the case of a broadcasting station that does not belong to a series, a method of assigning to an empty channel selection key can be considered.

Here, a “cross net station” is a broadcasting station belonging to multiple affiliates. Currently, TV Oita (Fuji TV / Nippon TV), TV Miyazaki (Fuji TV / Nippon TV / TV Asahi), and Fukui Broadcasting (Nippon TV / TV Asahi) correspond to cross-net stations.
The “primary sequence ID” means that the cross-net station belongs to a plurality of sequences, and therefore has a plurality of sequence IDs. Among them, the sequence ID having the highest priority is called a primary sequence ID. Incidentally, the sequence ID having the second highest priority after the primary is referred to as a “secondary sequence ID”.

  A more specific mode of use of the receiver in which a plurality of broadcasting stations are preset based on the sequence ID as described above for the channel selection key will be further described.

  FIG. 6 shows an example of a mode used in this embodiment. Since the receiver of the present invention is used as a vehicle-mounted television, it is composed of a display unit 8 and a function / tuning key 24 on the front panel of the car. The operation unit 5 in FIG. 1 may be a function / channel selection key 24 or a remote controller 34. Note that the function / channel selection key is a generic term for a function key written as “F1” or the like and a channel selection key written in numbers.

  FIG. 7 illustrates details of the remote controller 34. The remote controller 34 has operation keys such as a power key 21, a preset memory switching key 22, a channel up / down key 23, and a function / channel selection key 24.

  6 to 7, the function key may be provided with a key for independently activating functions such as “basic area scan” and “movement area scan”. It can also be selected by the number of times the preset memory switching key 22 is pressed or by selection from the selection display on the display unit 8 (selection from a menu by software, “soft menu”).

  As described in the present embodiment, considering that the basic area scan is a preset in the main living area, the basic area preset is unlikely to be a frequently performed process. On the other hand, the movement area scan is a process that needs to be performed every time the vehicle moves, travels in the fringe area, or enters another broadcast area, and therefore is likely to be frequently performed. Therefore, the basic area scan may be assigned an operation with a relatively large number of operations using the soft menu, but the movement area scan is preferably assigned a dedicated key or can be performed with a simple operation.

  For example, a moving area scan can be performed by long pressing the channel up / down key 23, and a preset memory switching key 22 is provided. Now, when performing a movement area scan while traveling, if you press and hold the up / down key 23, you can preset the broadcast stations that can be received at that time based on the sequence ID, and when you return to the main living area The bank can be switched to the basic area simply by depressing the preset memory switching key 22.

  It should be noted that when the basic area is used for channel selection, if the area scan for movement is performed, it is preferable that the bank is automatically switched to the area for movement.

  FIG. 8 shows an example of the display state of the display unit 8 during presetting. The screen will display “Channel Searching” to indicate to the user that the receiver is in the process of presetting. In this display, “basic area scan” and “movement area scan” may be distinguished and displayed.

  In addition, a progress status 25 indicating the preset status is shown. Since there are a finite number of physical channels, the user is informed of how far the preset is progressing. Although a bar-like display is used here, it may be a circle or other shapes, and is not limited as long as the method indicates the ratio of the number of currently completed preset processes to the total number of channels to be examined.

  A receivable station 26 is also shown. As a result, the user can grasp what kind of broadcasting stations can be received. Here, the broadcast station name and the service number are shown, but the sequence number, its name, the correspondence with the channel selection key number, and the like may be shown.

  FIG. 9 illustrates a case where the current contents of the preset memory 7 are displayed on the display unit 8. Here, the state of the preset memory in the movement area 32 of FIG. 3 is shown. Although the channel selection key number, the series name, the broadcast station name, and the service number are displayed, the present invention is not limited to this. Although the series name is displayed as a name, the series ID number may be displayed as it is. By displaying the contents of the preset memory 7 on the display unit 8 in this manner, the user can grasp at a glance which selection key can currently select the program of that series. Similarly, it goes without saying that the contents of the basic area 31 can be shown.

  FIG. 10 illustrates the transition of services when selecting a channel. This is the case in the movement area 32 of FIG. The channel selection key number “1” is assigned with A broadcast and O broadcast, and each provides three services. Each time the “1” key of the channel selection key 24 of FIG. 6 or the channel selection key 24 (FIG. 7) of the remote controller 34 is depressed, the service numbers “011”, “012”, “013” of the A broadcast as shown in FIG. ", The service changes in the order of O broadcast service numbers" 031 "," 032 ", and" 033 ". Since these are broadcasting stations of the same series, they often broadcast the same program. Therefore, it becomes easy to continuously watch the same program by a simple operation of pressing the same “1” key.

  A specific operation will be described. In the configuration of FIG. 1, consider a case where a user who is currently viewing a broadcast corresponding to the channel selection key “4” depresses the “1” key with the channel selection key of the operation unit 5. The controller 6 detects this and confirms the contents of the movement area 32 of the preset memory 7. Then, it knows that A broadcast and O broadcast are assigned.

  The control unit 6 first issues an instruction ORF to the tuner unit 2 so as to select the A broadcast. The tuner selects a physical channel corresponding to the instructed broadcast A and outputs a tuned signal SRF. Next, the control unit 6 instructs the MPEG decoding unit 4 to further output the service 011. Therefore, the OFDM demodulator 3 that has received the signal SRF demodulates it and outputs a transport stream TS. Then, the MPEG decoding unit decodes the service 011 instructed from the control unit 6 and outputs the video signal SV and the audio signal SA.

  If the same channel selection key “1” is further depressed, the control unit 6 instructs the MPEG decoding unit 4 to output the next service 012. In this way, every time the channel selection key “1” is depressed, the contents of the preset memory are confirmed, and the MPEG decoding unit 4 is instructed to output the service sequentially. When the A broadcast is finished, this time, the tuner unit 2 is instructed to select the O broadcast, and the MPEG decode unit 4 is instructed to output in order from the service 031 during the O broadcast.

  In addition, although the control part 6 acquired the information regarding the channel selection key "1" in the preset memory 7 here, the case where channel selection was performed one by one whenever the channel selection key "1" was operated was shown. A predetermined data in the preset memory 7 may be read each time the channel selection key is operated using the pointer.

  In this way, each time the same channel selection key is pressed, the assigned broadcast is selected and the service is output. Therefore, this is different from the operation of the up / down key that sequentially selects all the services that can be received.

  FIG. 11 shows a display example of the display unit 8. This is a device for showing as much information as possible on a small screen. The tuning key number 12 indicates the key number currently selected. “2/4” shown below indicates that the total number of services assigned to the current channel selection key “1” is 4 (No. 14 in FIG. 11), and currently viewing the second service. (No. 13 in FIG. 11). This is the case, for example, when two broadcasting stations with the same series ID are assigned to the channel selection key number “1”, one of which provides one service and the other one provides three services. Is applicable. Also, the number 13 is set to a number representing the number of all the broadcasting stations currently assigned to the same channel selection key, and the number of services 14 is preset for the channel selection key. It may be the number of stations.

  The broadcast station name 15, the program name 17, the service number 16, and the broadcast time 18 all indicate information on the program that is currently being viewed. The reception level 19 represents the current reception level. An icon 20 indicating the type of preset memory indicates whether the currently selected memory bank is a “basic area” or a “movement area”. For example, the icon 20 in FIG. 11 indicates “basic area”.

  These displays can be realized with soft keys, but for simple operations, it is better to prepare function keys independently. For example, this display may be made by pressing a channel selection key, and automatically disappear after a certain time.

  In this way, by allowing multiple allocation of affiliated stations that the user is accustomed to using to the channel selection key and realizing the display as shown in FIG. 11 on the display unit, presets frequently occur and EPG is difficult to use on a small screen But it becomes possible to select a channel easily.

  In the embodiment, two banks have been described. However, the number of banks is not limited to two, and may be three or more or one.

  Since the digital broadcast receiver of the present invention presets a plurality of broadcast stations to one channel selection key, it can be preset more than the number of channel selection keys, and can be preset by a simple operation of pressing the same channel selection key. It has the convenience of being able to switch between multiple services of broadcast stations in Japan, and is intended for mobile receivers and portable receivers intended for mobile reception, and home receivers used in areas where broadcast areas overlap It is also applicable to.

Schematic block diagram showing the configuration of a digital broadcast receiver in the present invention Flow chart showing operation of preset setting when the present invention is applied The figure showing the switch in the preset memory in Embodiment 2 The figure which shows a mode that moves the fringe area of a broadcast area The figure which shows the transition of the data of the preset memory in embodiment The figure which shows the example of the usage pattern of this invention Figure showing the remote control Figure showing an example of display during channel search The figure which shows the example at the time of displaying the contents of the preset memory which is preset The figure which shows the example of how to move the service when the tuning key is operated The figure which shows the example which displays tuning information on a display part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna 2 Tuner part 3 OFDM demodulation part 4 MPEG decoding part 5 Operation part 6 Control part 7 Preset memory 8 Display part 9 Audio | voice output part 10 Channel selection key number 11 Sequence ID
12 Channel selection key number 13 Number indicating the number of services among all services allocated to the channel selection key 14 Number of services allocated to the channel selection key 15 Broadcast station name 16 Service number 17 Program name 18 Broadcasting time 19 Reception level 20 Preset memory type icon 21 Power key 22 Preset memory switching key 23 Channel key 24 Tuning key 25 Progress 26 Receivable station 27 Road 28 Receivable area of broadcasting station in YY prefecture 29 ZZ Receivable areas of broadcasting stations in prefectures 30 Receivable areas of broadcasting stations in YY and ZZ prefectures 31 Basic area 32 Area for movement 33 Handle 34 Remote control 35 Area to be copied

Claims (7)

A digital broadcast receiver having a channel preset function, comprising: means for assigning a plurality of broadcast stations and a plurality of services to one channel selection key. 2. The digital broadcast receiver according to claim 1, wherein a plurality of broadcast stations and a plurality of services preset to the channel selection key can be switched by repeatedly pressing one channel selection key. 2. The digital broadcast receiver according to claim 1, further comprising means for assigning the same affiliated station to the same channel selection key when assigning a plurality of broadcast stations to one channel selection key. 4. The assigning process according to claim 3, wherein cross net broadcasting stations belonging to a plurality of sequences are processed for all the affiliated sequences and assigned to a plurality of channel selection keys corresponding to the respective sequences. The digital broadcast receiver according to claim 3. 4. The allocation process according to claim 3, wherein a cross-net broadcasting station belonging to a plurality of affiliates is not processed for all affiliated affiliates, and a representative affiliate is treated as the affiliated affiliate, and one channel is selected. 4. The digital broadcast receiver according to claim 3, wherein the digital broadcast receiver is assigned to a key. 4. The digital broadcast receiver according to claim 3, wherein, in the assignment process according to claim 3, a broadcast station that does not belong to a series or cannot obtain series information is assigned to an empty channel selection key. 4. The preset information storing area according to claim 3, wherein a plurality of preset information storage areas are provided, one is assigned to a basic area, the other is assigned to a movement area, and a movement area assignment process is performed based on sequence information of the basic area. Digital broadcast receiver.

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