JP3922976B2 - Digital receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital receiving apparatus to which a tuner unit can be attached and detached.
[0002]
[Prior art]
Conventionally, various digital receivers to which a tuner unit can be attached and detached have been developed. In a conventional digital receiver, an analog broadcast tuner card is used as a mainstream tuner unit.
[0003]
For example, Japanese Patent Application Laid-Open No. 6-113318 discloses a card-type high-frequency device having a tuner that can be attached to video equipment and information equipment. As shown in FIG. 19, this card type high frequency device includes a tuner circuit unit 50, a channel control circuit unit 53, and a demodulation circuit unit 54, and has a VHF circuit unit 51 and a UHF circuit unit 52 in the tuner circuit unit 50. It is. Then, the card-type high-frequency device is mounted on a video device or an information device so that the video device or the information device functions as a television receiver.
[0004]
Japanese Utility Model Laid-Open No. 3-122894 discloses a game machine to which a tuner block can be attached. As shown in FIG. 20, the game machine includes a game machine body 60 and a tuner block 70 that can be attached to and detached from the game machine body 60. The game machine body 60 includes a power supply unit 61, a game drive circuit 62, an audio circuit 63, a liquid crystal display block 64, a speaker 65, a switch 66, and an IC card 67. The tuner block 70 includes a receiving circuit 71, a rod antenna 72, and a protrusion 73. When the tuner block 70 is attached to the game machine main body 60, the projection 73 turns off the switch 66, cuts off the power supply of the power supply unit 61 to the game drive circuit 62, and simultaneously supplies power to the tuner block 70. Thus, the game machine is caused to function as a television receiver without generating disturbing electromagnetic waves from the game drive circuit 62.
[0005]
Further, JP-A-5-168021 discloses a detachable satellite tuner. As shown in FIG. 21, the satellite tuner includes a second intermediate frequency conversion circuit 81, an FM demodulation circuit 82, a QPSK / PCM demodulation circuit 83, decoders 84 and 85, a video switching circuit 86, an audio switching circuit 87, and a detection output. A circuit 88 is provided. In this way, the satellite tuner is mounted on the apparatus main body, and the video switching circuit 86 and the audio switching circuit 87 are switched according to a plurality of scramble systems to function as a television receiver.
[0006]
[Problems to be solved by the invention]
In these conventional devices, the information necessary on the main body side for channel selection is only the channel number and frequency, so the amount of information is small and there is no problem. However, at the present time when digital broadcasting is being shifted, a memory of several MB is required only for program information. For this reason, if different types of tuner units are mounted and information that is no longer needed is stored as it is, the memory cannot be used effectively.
[0007]
Therefore, in the conventional digital receiver, as shown in FIG. 22, the information is invalidated every time the power of the digital receiver is turned on (S101), or the information is invalidated every time the tuner unit is removed ( S102). However, discarding information that is no longer needed and re-acquiring this information every time the device is started is inefficient, and some information cannot be selected unless it is acquired first. To do.
[0008]
The present invention has been proposed in view of the above-described circumstances, and an object thereof is to provide a digital receiver capable of efficiently performing memory management in the main body according to the type and mounting state of a tuner unit. To do.
[0009]
[Means for Solving the Problems]
  A digital receiver according to the present invention includes a tuner unit having a tuner unit that can be attached to and detached from the apparatus main body, recording means for storing broadcast wave information relating to broadcast waves that can be received by the tuner unit, and an attachment / detachment operation of the tuner unit. Attaching / detaching operation discriminating means for discriminating presence or absenceIn the digital receiving device, the broadcast wave information held in the recording unit is deleted when the attachment / detachment operation determining unit determines that the tuner unit is attached / detached. And
[0010]
  The digital receiver according to the present invention includes a tuner unit having a tuner unit that can be attached to and detached from the apparatus main body, and a recording unit that stores broadcast wave information relating to broadcast waves that can be received by the tuner unit. Using the information on the wearing state of the broadcast wave and the type of broadcast wave that can be received,Whether the broadcast information is storedIt is characterized by judging.
[0011]
Here, when there are a single tuner unit or a plurality of tuners of the same type, all usable areas in the recording means are opened to broadcast waves that can be received by the tuner unit, and there are a plurality of types of tuner units. In this case, the usable area in the recording means is divided by the broadcast wave corresponding to each tuner unit.
Then, when a plurality of broadcast waves are received, it is preliminarily assumed to be divided, and the basic unit and the extended unit are used separately.
[0012]
Analyzing the received signal obtained from the mounted tuner unit, and using information indicating the type of broadcast wave included in the broadcast wave, the type of broadcast wave that can be received by the tuner unit may be determined,
The type of broadcast wave that can be received by the tuner unit may be determined using information indicating the type of broadcast wave that can be received by the tuner unit, which is added to the reception signal transmitted by the tuner unit that is mounted. And
When the mounted tuner unit receives a channel selection instruction from the apparatus main body at the start of operation, and the frequency range of the channel selection instruction is not the channel selection range of the tuner unit, the tuner unit is attached to the apparatus main body. An error response may be returned, and the apparatus main body may determine the type of the tuner unit that is mounted based on the error response parameter.
[0013]
Since the digital receiver according to the present invention has the above-described configuration, it is possible to effectively use a memory area (recording unit) for storing broadcast wave information according to the type of broadcast waves that can be received. it can. In addition, the broadcast wave information can be reacquired inadvertently, thereby eliminating problems such as the inability to select a channel.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a digital receiver according to the present invention will be described with reference to the drawings.
[0015]
<First Embodiment>
The first embodiment of the present invention is a digital device in which a tuner unit is mounted on an electronic device (main body) such as a liquid crystal display with an MPEG2 playback function that does not have a tuner so that it can also function as a television receiver. It is a receiving device. Examples thereof will be described below.
[0016]
[Example 1]
FIG. 1 is a block diagram showing a first embodiment of a digital receiving apparatus according to the present invention. This digital receiver comprises a detachable card type tuner unit 10a and an apparatus body 20a.
[0017]
The tuner unit 10 a includes a tuner unit 11, a demodulation unit 12, an interface unit 13, and a register 14. This register 14 stores broadcast wave information indicating the types of broadcast waves that can be received by the tuner unit 10a. Here, the broadcast wave type means a terrestrial digital wave, a BS digital wave, or the like.
[0018]
The apparatus main body 20a includes a slot unit 21 in which the tuner unit 10a is mounted, an interface unit 22, a signal processing / control unit 23, a memory 24, a display unit 25, an audio output unit 26, and an attachment / detachment operation determination unit 27. Here, the display means 25 is a liquid crystal display device, for example, and provides an image to the user. The audio output means 16 is a speaker and provides audio to the user.
[0019]
FIG. 1 shows a case where the tuner unit 10a is mounted in the slot portion 21 of the apparatus main body 20a. When the tuner unit 10a is attached to the slot portion 21 of the apparatus main body 20a, the attachment / detachment operation discriminating means 27 detects the attachment of the tuner unit 10a via the interface portion 22, and sends the detection signal to the signal processing / control portion 23. The signal processing / control unit 23 stores in the memory 24 the mounting history indicating the mounting state of the tuner unit 10a and the broadcast wave information retrieved by accessing the register 14 of the tuner unit 10a. The tuner unit 11 extracts a video signal of a predetermined channel from a predetermined broadcast wave type, and the demodulation unit 12 demodulates the video signal. The demodulated signal is sent to the signal processing / control unit 23 via the interface units 13 and 22. The signal processing / control unit 23 processes this signal and sends it to the display means 25 and the audio output means 26 to provide video and audio to the user.
[0020]
In the digital receiver according to the first embodiment, when the tuner unit 10a for digital terrestrial broadcasting is installed in the slot unit 21, the broadcast of the tuner unit 10a stored in the register 14 in the broadcast wave information storage area in the memory 24 is performed. Wave information (information that terrestrial digital broadcasting can be received) is stored. Then, after a sufficient time has elapsed since the tuner unit 10a started reception, the acquisition of information for terrestrial digital broadcasting is completed, and the apparatus main body 20a is also in an effective state for functioning as a television receiver. .
[0021]
Thereafter, even if the power supply 28 of the apparatus main body 20a is turned on / off, the broadcast wave information stored in the broadcast wave information storage area of the memory 24 is stored in the register 14 of the tuner unit 10a unless the tuner unit 10a is removed. The broadcast wave information is in a state consistent with the broadcast wave information, that is, the information remains valid.
[0022]
When a mismatch between the information stored in the memory 24 and the information stored in the register 14 of the tuner unit 10a occurs, that is, the broadcast wave information stored in the memory 24 becomes invalid at least in the slot portion. This is after the tuner unit 10 a is removed from 21. Therefore, the attachment / detachment operation determination means 27 detects that the tuner unit 10a has been removed from the slot portion 21, and based on the result, the signal processing / control portion 23 determines whether at least the broadcast wave information on the memory 24 is valid. Can be judged.
[0023]
As described above, there is a close relationship between the history that the tuner unit 10 a has been removed and the effectiveness of information relating to broadcast waves stored in the broadcast wave information storage area on the memory 24.
[0024]
FIG. 2 shows an information management procedure in the digital receiver according to the first embodiment.
As described above, in the conventional digital receiving apparatus, as shown in FIG. 22, when the power supply 28 of the apparatus main body 20a is turned on and when the tuner unit 10a is removed, information regarding broadcast waves is invalidated. (S101, S102).
[0025]
On the other hand, as shown in FIG. 2, the signal processing / control unit 23 of the digital receiving apparatus according to the first embodiment does not immediately invalidate when the power supply 28 of the apparatus main body 20a is turned on. The attachment / detachment history of the tuner unit 10a stored in the memory 24 is checked (S1), and it is confirmed whether there is a history that the tuner unit 10a has been removed (S2). Only when it is removed, the broadcast wave information stored in the memory 24 is invalidated, that is, deleted (S3).
Therefore, rather than simply invalidating the information each time the power supply 28 of the apparatus main body 20a is turned off, the installation history is automatically checked every time the power is turned on to determine the processing of the broadcast wave information. Information management can be performed.
[0026]
[Example 2]
FIG. 3 is a block diagram showing a second embodiment of the digital receiver according to the present invention. Portions common to the first embodiment are denoted by the same reference numerals. The apparatus main body 20 b is different from the first embodiment in that a tuner unit determination unit 29 is provided instead of the attachment / detachment operation determination unit 27. The tuner unit 10b does not have the register 14.
[0027]
In the digital receiver according to the first embodiment described above, the correlation between the history that the tuner unit 10a has been removed and the effectiveness of the broadcast wave information stored in the broadcast wave information storage area of the memory 24 of the apparatus body 20a. However, the digital receiver according to the second embodiment changes the point of focus in order to perform more detailed management.
[0028]
The history that the tuner unit has been removed is a necessary condition that the broadcast wave information stored in the broadcast wave information storage area stored in the memory is valid, but is not a necessary and sufficient condition. That is, the necessary and sufficient condition is that the broadcast wave information stored in the broadcast wave information storage area of the memory matches that which the tuner unit can receive.
[0029]
As already described, in order to change the tuner unit, it is only necessary to detect that the tuner unit has been removed, but in order to detect this when the main unit is turned off, A new detection device is required. Therefore, in the digital receiver according to the second embodiment, when the power supply 28 of the main body device 20b is turned on and the power supply 28 of the main body device 20b is turned on by ignoring the attachment / detachment of the tuner unit 10b that occurs when the power supply 28 of the main body device 20b is turned off The type of the tuner unit 10b that is being used (the type of broadcast wave that can be received) is discriminated.
[0030]
That is, in the digital receiver according to the second embodiment, when the power supply 28 of the main device 20b is turned on, the tuner unit 10b can be received when the tuner unit 10b is mounted with the power supply 28 of the main device 20b turned on. The tuner unit discriminating means 29 discriminates the kind of broadcast wave. That is, in the digital receiver according to the second embodiment, when the tuner unit 10b for digital terrestrial broadcasting is mounted in the slot unit 21, the tuner unit determining unit 29 determines, and the signal processing / control unit 23 is Broadcast wave information indicating that the broadcast can be received is stored in a broadcast wave information storage area on the memory 24.
[0031]
FIG. 4 shows an information management procedure in the digital receiver according to the second embodiment.
In the digital receiver according to the second embodiment, as shown in FIG. 4, when the power supply 28 of the apparatus main body 10b is turned on, the tuner unit discriminating means 29 can receive the types of broadcast waves that can be received by the tuner unit 10b. Is discriminated (S11). The determination method at this time will be described later in detail.
[0032]
At this time, if it cannot be determined, the tuner unit 10b is not mounted, and if it can be determined, the tuner unit is mounted (S12). The signal processing / control unit 23 ends the process if the broadcast wave information stored in the memory 24 is valid, and proceeds to S14 if the broadcast wave information is invalid (S13). Here, what is valid is that broadcast wave information is stored in the memory 24. On the other hand, the invalidity means that no broadcast wave information is stored in the memory 24, and the tuner unit has not been mounted at all until now or has been deleted.
[0033]
In S14, the broadcast wave information stored in the broadcast wave information storage area of the memory 24 is compared with the broadcast wave type of the tuner unit 10b (S14). If they match, the process ends, and if they are different, the process becomes unnecessary. After invalidating the information (S15), the process proceeds to S16. In S16, broadcast wave information is reacquired (S16). The information reacquisition means that the signal processing / control unit 23 rewrites the broadcast wave information in the broadcast wave information storage area of the memory 24 based on the determination result from the tuner unit determination means 29.
[0034]
By performing such processing, when the tuner unit 10b is removed or not installed, the broadcast wave information stored in the memory 24 is not invalidated as in the conventional technique, and the power is turned on. The broadcast wave information is automatically investigated every time it is inserted, and the processing of the broadcast wave information is judged, so that the information can be managed more efficiently.
[0035]
While the tuner unit 10b is removed, the apparatus main body 20b does not have a tuner portion, so that broadcast waves cannot be received. During this time, the broadcast wave information storage area of the main body memory 24 may be used for other purposes (game, communication, etc.). This case is shown in FIG. For example, when the invalidation factor as described above occurs, the signal processing / control unit 23 invalidates the broadcast wave information storage area of the main body memory 24 (S21) and uses it for other purposes.
However, when the tuner unit 10b is attached, the broadcast wave information in the memory 24 is invalid in S13 of FIG. 4 and information is reacquired (S16).
[0036]
Next, let us consider the means for knowing the types of broadcast waves.
For example, the tuner unit discriminating means 29 is provided with a dedicated pin 31 in the interface section 13 of the slot section 21 as shown in FIG. If the state of the signal output to the dedicated pin 31 is determined in advance, it is possible to determine the broadcast wave type of the tuner unit 10b mounted in the slot portion 21 by decoding the input from these signal lines. it can. Naturally, a database for determining the type of broadcast wave is stored in the memory 24, and the corresponding broadcast wave information is acquired from these and stored in the broadcast wave information storage area.
[0037]
Further, as shown in FIG. 7, another example of the tuner unit discriminating means 29 is provided with a mechanical irregularity 32 in the interface unit on the tuner unit 10b side, and an irregularity sensing mechanism 33 installed on the slot unit 21 side. By recognizing the shape, it is possible to determine the broadcast wave type of the tuner unit 10b attached to the slot portion 21. A database for discriminating the type of broadcast wave is stored in the memory 24, and the tuner unit discriminating means 29 makes a judgment based on the database, acquires the corresponding broadcast wave information from these, and stores it in the broadcast wave information storage area. .
[0038]
Example 3
FIG. 8 is a block diagram showing Embodiment 3 of the digital receiving apparatus according to the present invention. The basic structure of this digital receiving apparatus is the same as that of the second embodiment, but the difference is that the tuner unit 10 a has a register 14. Information indicating the types of broadcast waves that can be received by the tuner unit 10a is stored therein. Then, as shown in FIG. 9, the tuner unit discriminating means 29 accesses a specific address of the register 14 and reads out the value of the register 14 by using the general-purpose bus 34 prepared in the interface unit 22. The type of broadcast wave that can be received by the tuner unit 10a attached to the receiver 21 can be determined.
[0039]
Here, a general-purpose interface such as PCMCIA is desirable for the interface sections 13 and 22 between the apparatus main body 20b and the tuner unit 10a, and in this case, the tuner unit 10a can receive by register access complying with the PCMCIA standard. Information representing the broadcast wave type is read out.
[0040]
Example 4
The tuner unit discriminating means for knowing the type of broadcast wave described above intentionally gives information to the tuner unit, and the main body reads the information. However, even if information is not intentionally read from the tuner unit, the received broadcast wave includes information indicating the broadcast wave type. Therefore, broadcast wave information that can be received by the tuner unit can be obtained from the received signal.
[0041]
FIG. 10 is a block diagram showing Embodiment 4 of the digital receiving apparatus according to the present invention. This digital receiving apparatus includes a tuner unit 10c and an apparatus main body 20b. The tuner unit 10c is obtained by adding an instruction processing unit 15 and a channel selection unit 16 to the tuner unit 10a. The command processing unit 15 processes and analyzes the command signal input from the signal processing / control unit 23 to extract a channel selection command signal. Based on this, the channel selection unit 16 makes a determination described below, and causes the tuner unit 11 to select a channel instructed.
[0042]
In the digital receiver according to the fourth embodiment, as shown in FIG. 10, when the power of the main unit 20b is turned on and when the tuner unit 10c is mounted with the power 28 of the main unit 20b turned on, Is selected by the signal processing / control unit 23 to the tuner unit 10c. In the channel selection instruction, the frequency to be tuned is described.
[0043]
Upon receiving the tuning instruction, the tuner unit 10c determines whether or not the instructed tuning frequency is within its tunable frequency range. If the tuning unit 10c is within its own tunable frequency range, the tuner unit 10c performs tuning. An error is returned to the apparatus main body 20b side. As parameters for returning this error, information indicating broadcast waves that can be selected by itself is transmitted.
[0044]
The apparatus body 20b side that has received the error response determines the reason for the error from the information described in this response. Here, if the instructed tuning frequency is outside the selectable frequency range, the receivable broadcast wave type of the tuner unit 10c is determined from the information indicating the receivable broadcast wave type described therein. Judgment can be made.
[0045]
Specifically, as shown in FIG. 11, when a channel selection signal for the tuner unit 10c is generated in the signal processing / control unit 23 of the apparatus main body 20b, it is determined whether or not the tuner unit 10c is being mounted (S31). ). Whether the tuner unit 10c is attached is determined by the tuner unit discriminating means 29 as described above. Note that an attachment / detachment operation determining means may be provided for the determination.
Here, if the tuner unit 10c is being mounted, the signal processing / control unit 23 of the apparatus main body 20b gives a channel selection instruction to the tuner unit 10c. The channel selection instruction is input to the instruction processing unit 15 of the tuner unit 10c via the interfaces 22 and 13, and the instruction analysis is performed. When the channel selection instruction is input to the channel selection unit 16, the channel selection unit 16 determines whether or not the instructed tuning frequency is within its tunable frequency range (S32). The channel is selected as it is, and if it is out of range, an error is returned to the main unit. The error response is input to the signal processing / control unit 23 of the apparatus main body 20b via the command processing unit 15 and the interface units 13 and 22. As parameters for returning this error, information indicating broadcast waves that can be selected by itself is transmitted.
When the tuning of the tuner unit 11 is completed, the channel selection unit 16 outputs an end response signal, which is input to the signal processing / control unit 23 of the apparatus main body 20b via the command processing unit 15 and the interface units 13 and 22, and processed. Exit.
[0046]
Upon receiving an error response from the tuner unit 10c, the signal processing / control unit 23 determines whether or not the reason for the error indicates outside the tuning frequency (S33), and when the reason for the error indicates outside the tuning frequency. Further, it is determined whether or not the broadcast wave of the tuner unit 10c is the same as the scheduled type (S34).
[0047]
If the broadcast wave of the tuner unit 10c is different from the scheduled type, the tuner unit management information is changed (S35). Further, when the error reason does not indicate outside the tuning frequency (No in S33), and when the broadcast wave of the tuner unit 10c is the same as the scheduled type (Yes in S34), various error processing (S36) is performed.
[0048]
Here, the processing of the tuner unit determination means 29 will be described.
For example, in BS digital broadcasting, information called Network Id is included in NIT (Network Information Table), and this information takes a value specific to the broadcast wave. Therefore, by examining this value, the type of tuner unit 10c mounted in the slot portion 21 can be determined.
[0049]
The tuner unit discriminating means 29 performs tuner discrimination from the Network Id when the power is turned on to the main body side or the tuner unit 10c is mounted, and broadcast wave information that can be received by the tuner unit 10c is stored in the memory 24. To store.
Here, the configuration is such that the tuning instruction is given to the tuner unit from the apparatus main body side, but the tuner unit may have a configuration in which predetermined tuning is performed in advance.
[0050]
Example 5
Although the configuration of the fifth embodiment is the same as that of FIG. 10 showing the fourth embodiment, the tuner unit determination method is different from the above-described embodiment. A certain amount of time is required to acquire the NIT. That is, in the case of digital broadcasting, the NIT transmission cycle is 10 seconds. During this 10 seconds, the receiver cannot understand what broadcast wave is being received, and in some cases cannot present video / audio to the user.
[0051]
Therefore, in the digital receiver according to the fifth embodiment, information indicating the type of broadcast wave is added to the transport stream output from the tuner unit 10c to the main device 20b. Currently, many Null packets are inserted in a transport stream generated by receiving and demodulating a BS digital broadcast wave in order to adjust a transfer rate. When the tuner unit sends the transport stream to the main body side, the tuner unit describes a value indicating the type of broadcast wave in a specific field in the Null packet. When receiving the Null packet, the main body side that has received this transport stream can read the value of the specific field described above and determine the type of the tuner unit.
[0052]
FIG. 12 shows a basic structure of a transport stream and a packet.
The tuner unit 10c demodulates the broadcast wave to create a transport stream. The transport stream is composed of many packets as shown in FIG. Among these packets, those with PID (packet ID) of 0x1FFF are called Null packets. That is, the Null packet is a packet that fills a gap between effective packets in order to adjust the transfer rate of the broadcast wave.
[0053]
Since this Null packet has an area (field) to which an arbitrary value is assigned, the area is overwritten in the tuner unit 10c. That is, in FIG. 12, in the case of a Null packet, there is no adaptation field and it is integrated into the payload. In the case of a Null packet, an arbitrary value can be assigned to the payload. Broadcast wave information is written in this portion, and the tuner unit discriminating means 29 discriminates based on this information.
[0054]
Example 6
FIG. 13 is a block diagram showing Embodiment 6 of the digital receiver according to the present invention. In this case, two tuner units 10a and 10d are mounted in two slot portions. The tuner unit 10a can receive terrestrial digital broadcasting, and the tuner unit 10d can receive BS digital broadcasting.
[0055]
FIG. 14 illustrates a memory state when the information management method used in the digital receiver according to the sixth embodiment is applied.
In FIG. 14, the broadcast wave information storage area of the memory 24 in the “initial state” is divided into a “BS basic area” and a “terrestrial basic area”. It remains in this state unless a tuner unit is installed.
The case where the BS digital broadcast tuner unit 10d is attached is “BS tuner attachment”, and the “BS basic area” is used as it is and the “terrestrial basic area” is used as the “BS extension area”. The same applies to the case where two tuner units for BS digital broadcasting are installed.
[0056]
The case where the tuner unit 10a for digital terrestrial broadcasting is added is “terrestrial tuner installation”, and the “basic basic region” is used as it is and the “BS basic region” is used as the “terrestrial extended region”. The same applies when two tuner units for digital terrestrial broadcasting are installed.
Finally, the case where one BS digital broadcast and one terrestrial digital broadcast tuner unit is installed is “BS / terrestrial tuner installation”, and the state is the same as the “initial state”.
As described above, very efficient management can be realized by dividing the broadcast wave information storage area.
[0057]
Second Embodiment
In the second embodiment, unlike the first embodiment, the apparatus main body of the digital reception apparatus also includes a tuner and can receive BS digital broadcasts. The tuner unit receives terrestrial digital broadcasting and BS digital broadcasting.
[0058]
Example 7
FIG. 15 is a block diagram showing Embodiment 7 of the digital receiving apparatus according to the present invention. This digital receiving apparatus has substantially the same configuration as that of FIG. 1 of the first embodiment, except that the apparatus main body 20c includes a tuner unit 31 and a demodulating unit 32 for BS digital broadcast reception. Therefore, the signal processing / control unit 24 stores BS digital broadcast information in a part of the broadcast wave information storage area of the memory 24. The memory 24 stores the information separately from the information about the broadcast wave acquired from the tuner unit 10a attached to the slot unit 21.
[0059]
That is, the information storage area of the memory 24 has a broadcast wave information storage area as shown in FIG. 16, and includes a BS area and a tuner unit area. When the tuner unit 10a for digital terrestrial broadcasting is installed in the slot 21, digital terrestrial broadcast information is stored in the tuner unit area in the broadcast wave information storage area of the memory 24. Then, after a sufficient time has elapsed since the tuner unit 10a started reception, the acquisition of information for terrestrial digital broadcasting is completed and becomes valid. Thereafter, even if the power supply 18 of the apparatus main body 20c is turned on / off, the information stored in the tuner unit area in the broadcast wave information storage area is information for terrestrial digital broadcasting unless the tuner unit 10a is removed. , The state that matches the tuner unit 10a, that is, the information remains valid.
[0060]
When the mismatch occurs, that is, the information becomes invalid at least after the tuner unit 10a is removed from the slot portion 21. Therefore, by detecting that the tuner unit 10a has been removed from the slot portion 21 by the attachment / detachment operation determination means 27, at least the broadcast wave information stored in the tuner unit area in the broadcast wave information storage area is the tuner unit 10a. It can be determined whether or not it matches the broadcast wave information in the register 14.
[0061]
Example 8
In the processing in the digital receiver according to the eighth embodiment described above, the broadcast wave information storage area is divided / integrated to improve the efficiency of information management.
Here, it is relatively easy to invalidate an area that is no longer needed and allocate it to another broadcast wave, but dividing an area in use with another application assumes division in advance. Otherwise, existing information cannot be used and re-acquisition becomes necessary. Therefore, in the digital receiver according to the eighth embodiment, the broadcast wave information storage area is divided in advance according to the type of broadcast wave that can be assumed to be received, and the basic area for each broadcast wave is determined. When a broadcast wave is received, the minimum necessary information is stored in the corresponding broadcast wave basic area, and the expansion information is stored in the empty area.
[0062]
FIG. 16 illustrates an example of a memory state when the information management method used in the digital receiver according to the eighth embodiment is applied. Here, a BS digital receiver (main body) is provided with one card slot, and receivable broadcast waves are limited to BS digital broadcast and terrestrial digital broadcast.
[0063]
In FIG. 16, the broadcast wave information storage area in the “initial state” is divided into a “BS basic area” and a “terrestrial basic area”.
Initially, only the BS tuner built in the main body is used and the tuner unit is not mounted is “main body single operation”. In this state, the “terrestrial basic area” is used as the “BS extended area”.
[0064]
The case where a BS digital broadcast tuner unit is attached is “BS tuner attachment”, and the state is not different from “main body single operation”. A case where a terrestrial digital broadcast tuner unit is attached is “terrestrial tuner attachment”, and the state is the same as the “initial state”.
As described above, very efficient management can be realized by dividing the broadcast wave information storage area.
[0065]
Example 9
FIG. 17 is a block diagram showing a ninth embodiment of the digital receiving apparatus according to the present invention. This digital receiving apparatus has substantially the same configuration as that of FIG. 3 of the second embodiment, except that the apparatus main body 20d includes a tuner unit 31 and a demodulating unit 32 for receiving BS digital broadcasts. That is.
[0066]
In the digital receiver according to the eighth embodiment described above, the broadcast wave information storage area of the memory 24 is divided into the BS digital receiver built-in tuner unit and the tuner unit added to the slot unit, but this is not always necessary. There are many cases where it is more efficient to regard it as one area. For example, this is a case where the user does not own the tuner unit and the tuner unit is not mounted. In this case, the broadcast wave information storage area for the tuner unit is completely wasted. If the same type of tuner unit as the built-in tuner is mounted in the slot portion 21, the same information is stored twice. In such a case, it is desirable to capture the entire broadcast wave information storage area as one area and store more information.
[0067]
On the other hand, when the tuner unit 10b for digital terrestrial broadcasting is installed in the slot portion 21, it is necessary to store two types of information for BS and information for terrestrial waves. Therefore, it is possible to divide the broadcast wave information storage area according to the type of broadcast wave that can be currently received, and to store more information, thereby improving the efficiency of information management.
[0068]
FIG. 18 illustrates a processing procedure in the digital reception device according to the ninth embodiment.
In the digital receiver according to the ninth embodiment, when the main unit was turned on, when the tuner unit 10b was installed with the main unit turned on, the tuner unit 10b was removed with the main unit turned on. At this time, the type of the tuner unit is determined.
Based on the above three conditions, the type of receivable broadcast wave is confirmed, and the broadcast wave information storage area is divided according to the number of broadcast waves.
[0069]
It should be noted that the broadcast wave information storage area is divided not by the total number of tuner units but by the number of types of receivable broadcast waves. For this reason, depending on the type of broadcast wave, the amount of information may be extremely different due to the included services, that is, the number of channels, etc., so it is preferable to generally divide the broadcast wave information storage area equally. Not exclusively. It is also possible to increase efficiency by dividing the broadcast wave information storage area at a ratio corresponding to the amount of information.
[0070]
Specifically, as shown in FIG. 18, when the tuner unit 10b is mounted with the main unit turned on, the signal processing / control unit 23 operates the tuner unit 10b with the main unit turned on. When removed, the type of the tuner unit 10b is determined (S41). Further, it is determined whether or not the tuner unit 10b is being mounted (S42), and whether or not the broadcast wave types of the built-in tuner unit 31 and the tuner unit 10b are different (S43).
[0071]
Here, when the tuner unit 10b is being installed and the broadcast wave types of the built-in tuner unit 31 and the tuner unit 10b are different, it is determined whether or not there is information of a broadcast wave type different from that of the built-in tuner unit 31 ( S44). If there is broadcast wave type information different from that of the built-in tuner unit 10b, it is further determined whether the broadcast wave of the information and the broadcast wave type of the tuner unit 10b are the same (S45). If the types are different, the information is invalidated (S46). Subsequently, the broadcast wave information storage area is divided (S47), and data for the tuner unit is acquired (S48).
[0072]
When the tuner unit 10b is not mounted (No in S42), or when the broadcast wave types of the built-in tuner unit 31 and the tuner unit 10b are the same (No in S43), the broadcast wave type different from that of the built-in tuner unit 31 is used. If the information exists (S50), the information is invalidated (S51), and the broadcast wave storage area is integrated (S52).
[0073]
If there is no broadcast wave type different from the built-in tuner unit 31 (No in S44), the broadcast wave information storage area is divided as it is (S47), and data for the tuner unit is acquired (S48).
[0074]
Further, when there is information of a broadcast wave type different from that of built-in tuner unit 31 and the broadcast wave type of the information is the same as the broadcast wave type of tuner unit 10b (Yes in S45), whether or not the information is valid. (S49), and if the information is invalid, data for the tuner unit is acquired (S48).
[0075]
【The invention's effect】
As described above, according to the digital receiver according to the present invention, memory management in the main body can be efficiently performed according to the type and mounting state of the tuner unit. Moreover, the effectiveness of the information about the broadcast wave once acquired can be determined efficiently according to the implementation status of the tuner unit. With these effects, it is possible to shorten the waiting time for information acquisition regarding broadcast waves and the time from when the power is turned on until channel selection is possible. Can be provided. Furthermore, the digital receiver according to the present invention can provide means for knowing the type of tuner unit mounted.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a first embodiment of a digital receiving apparatus according to the present invention.
FIG. 2 is a flowchart illustrating an information management procedure in the digital reception apparatus according to the first embodiment.
FIG. 3 is a block diagram showing a second embodiment of a digital receiving apparatus according to the present invention.
FIG. 4 is a flowchart illustrating an information management procedure in the digital receiver according to the second embodiment.
FIG. 5 is a flowchart illustrating another procedure of information management in the digital receiver according to the second embodiment.
FIG. 6 is a perspective view showing a configuration of tuner unit determination means.
FIG. 7 is a perspective view showing another configuration of the tuner unit discriminating means.
FIG. 8 is a block diagram showing a third embodiment of a digital receiving apparatus according to the present invention.
FIG. 9 is a perspective view showing still another configuration of the tuner unit discriminating means.
FIG. 10 is a block diagram showing a fourth embodiment of a digital receiving apparatus according to the present invention.
FIG. 11 is a flowchart illustrating another procedure of information management in the digital receiver according to the fourth embodiment.
FIG. 12 is an explanatory diagram showing a basic structure of a transport stream and a packet.
FIG. 13 is a block diagram showing a sixth embodiment of a digital receiving apparatus according to the present invention.
FIG. 14 is an explanatory diagram illustrating a memory state when an information management method used in a digital receiver according to a sixth embodiment is applied.
FIG. 15 is a block diagram showing a seventh embodiment of the digital receiving apparatus according to the present invention.
FIG. 16 is an explanatory diagram illustrating an example of a memory state when the information management method used in the digital reception device according to the eighth embodiment is applied;
FIG. 17 is a block diagram showing a ninth embodiment of the digital receiver according to the present invention.
FIG. 18 is a flowchart illustrating a processing procedure in the digital reception device according to the ninth embodiment;
FIG. 19 is a block diagram showing a conventional digital receiver.
FIG. 20 is a block diagram showing another conventional digital receiver.
FIG. 21 is a block diagram showing still another conventional digital receiver.
FIG. 22 is a flowchart showing an information management procedure of a conventional digital receiving apparatus.
[Explanation of symbols]
10a, 10b, 10c, 10d tuner unit
11, 31 tuner
12, 32 Demodulator
13,22 Interface part
14 registers
20a, 20b, 20c, 20d Device body
21 Slot
23 Signal processing / control unit
24 memory
25 Display means
26 Voice output means
27 Detachment operation discrimination means
28 Power supply
29 Tuner unit discrimination means

Claims (7)

A tuner unit having a tuner unit that can be attached to and detached from the apparatus main body, a recording unit that stores broadcast wave information related to broadcast waves that can be received by the tuner unit, and an attachment / detachment operation determination unit that determines whether the tuner unit is attached or detached. A digital receiver comprising:
The digital receiver according to claim 1, wherein when the attaching / detaching operation determining unit determines that the tuner unit has been attached / detached, the broadcast wave information held in the recording unit is deleted.   A tuner unit having a tuner unit detachably attached to the apparatus main body, and a recording means for storing broadcast wave information relating to broadcast waves that can be received by the tuner unit;
  A digital receiving apparatus characterized by determining whether or not the broadcast wave information is stored in the recording means by using information on a state in which the tuner unit is mounted and a receivable broadcast wave type.   When there are a single tuner unit or a plurality of tuner units of the same type, all usable areas in the recording means are opened to broadcast waves that can be received by the tuner unit, and there are a plurality of types of tuner units. 3. The digital receiving apparatus according to claim 2, wherein the usable area in the recording means is divided by broadcast waves corresponding to each tuner unit.   4. The digital receiving apparatus according to claim 3, wherein the digital receiving apparatus is divided into a basic unit and an extended unit, assuming that a plurality of broadcast waves are divided in advance.   The reception signal obtained from the attached tuner unit is analyzed, and the type of broadcast wave that can be received by the tuner unit is determined using information indicating the type of broadcast wave included in the broadcast wave. Item 5. The digital receiver according to Item 4.   Determining the type of broadcast wave that can be received by the tuner unit by using information indicating the type of broadcast wave that can be received by the tuner unit that is added to the reception signal transmitted by the tuner unit that is mounted. The digital receiver according to claim 4.   When the mounted tuner unit receives a channel selection instruction from the apparatus main body at the start of operation, and the frequency range of the channel selection instruction is not the channel selection range of the tuner unit, the tuner unit has an error in the apparatus main body. 5. The digital receiving apparatus according to claim 4, wherein a response is returned, and the apparatus main body determines the type of the tuner unit mounted based on the error response parameter.

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