JP2001217735A - Broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a broadcasting program from being interrupted when receiving of digital broadcasting is disabled during digital broadcasting receiving. SOLUTION: Concerning a simultaneous broadcasting receiver 10 for receiving a digital broadcasting signal and an analog broadcasting signal, this device has a digital signal processing part 15 for detecting the BER of the digital broadcasting signal, an analog signal processing part 14 for detecting the received field strength of the analog broadcasting signal and a CPU 20 for control for receiving the analog broadcasting signal when the BER of the digital broadcasting signal exceeds a reference value E and receiving the digital broadcasting signal when the received field strength of the analog broadcasting signal becomes equal with or higher than a reference value S while receiving of this analog broadcasting signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiving apparatus such as a simulcast receiver for simulcast broadcasting capable of receiving digital television broadcasting and analog television broadcasting.

[0002]

2. Description of the Related Art One of the features of digital terrestrial television broadcast reception scheduled to start in 2003 is a so-called cliff effect, in which if the reception condition of the radio wave deteriorates, reception becomes abruptly impossible. The phenomenon occurs.

FIG. 5 is an explanatory diagram showing the relationship between the reception state and the reception image quality in general analog broadcasting and digital broadcasting.

In the line A shown in FIG. 5, the reception state of analog broadcasting and digital broadcasting is in a good state, and the reception image quality is also excellent.

In the line B, the reception quality of analog broadcasting and digital broadcasting is deteriorated, but the reception quality of digital broadcasting is excellent, and the reception quality of analog broadcasting is slightly inferior. is there.

In the line C, the reception state of the analog broadcast and the digital broadcast is the worst, the reception quality of the digital broadcast is unreceivable, and the deterioration of the reception quality is unavoidable in the analog broadcast. Although it is in a state, the state is such that the image content can be understood.

As can be seen from FIG. 5, in the case of digital broadcasting, the deterioration of the received image quality is small until the reception state reaches the limit of the correction capability by the error correction processing. In some cases, the received image quality is rapidly deteriorated and digital broadcasting cannot be received. This is called the cliff effect phenomenon.

Therefore, in order to reduce such a phenomenon of the cliff effect, there is a so-called hierarchization method as a new technique in which a transmission band is divided into hierarchies and a modulation method is changed for each hierarchy. But the effect is not enough.

[0009] However, in the current analog broadcasting by each of the general modulation methods, when the received electric field strength is weakened, the received image quality is degraded in accordance with the received electric field intensity. I don't feel that much discomfort.

FIG. 6 shows C / N with respect to a bit error rate (bit error rate: BER) in each of the general modulation schemes.
FIG. 7 is an explanatory diagram showing a change characteristic of [dB], and FIG. 7 is an explanatory diagram showing a relationship between a five-stage quality deterioration evaluation and BER.

From these figures, at an electric field strength at which a BER of about 1 × 10 ⁻⁸ can be obtained, it is about 40 dBμ [v / m], and the BER at the reception limit is 1 × 10 ⁻⁴ .

C / N of BER of 1 × 10 ^-8 to 1 × 10 ^-4
Is about 5 dB.

That is, the received electric field strength is 35 dBμ [v /
m], digital terrestrial broadcasting cannot be received.

On the other hand, in the conventional analog television broadcasting, the received image quality is limited at an electric field strength of about 35 dBμ [v / m], but the sound is sufficiently practical.

[0015]

However, according to the conventional broadcast receiving apparatus, during reception of the terrestrial digital broadcast, for example, a field intensity of about 35 dBμ [v / m] just before the limit of error correction is exceeded. However, if reception in digital terrestrial broadcasting becomes impossible, there is a problem that a broadcast program related to digital broadcasting currently being received must be interrupted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for receiving an analog broadcast even if the digital broadcast becomes unreceivable during digital broadcast reception. An object of the present invention is to provide a broadcast receiving apparatus capable of avoiding interruption of a program as much as possible.

[0017]

A broadcast receiving apparatus according to the present invention is a broadcast receiving apparatus for receiving a digital broadcast signal and an analog broadcast signal, wherein the first detecting means detects a reception state of the digital broadcast signal; A second detection unit for detecting a reception electric field intensity of the analog broadcast signal; and a first detection unit for detecting the deterioration of the reception state of the digital broadcast signal. Control means for outputting the digital broadcast signal when the received electric field intensity of the analog broadcast signal detected by the second detection means becomes higher than a predetermined level during signal output.

Therefore, according to the broadcast receiving apparatus of the present invention,
Analog broadcast signals and digital broadcast signals are receivable, and the reception state of the digital broadcast signal is degraded, for example, when error correction processing becomes impossible, so that the analog broadcast signal is received, so during digital broadcast reception, Even if the digital broadcast cannot be received, the interruption of the broadcast program can be avoided as much as possible by receiving the analog broadcast, so that the service area can be expanded.

Further, according to the broadcast receiving apparatus of the present invention,
During the output of the analog broadcast signal accompanying the deterioration of the reception state of the digital broadcast signal, when the reception electric field strength of the analog broadcast signal becomes a predetermined level or more, it is determined that the reception state of the digital broadcast signal has also been recovered, and the digital Since a broadcast signal is output, a digital broadcast having better image quality and the like than an analog broadcast signal can be received as much as possible.

The broadcast receiving apparatus according to the present invention has storage means for storing a broadcast channel of the digital broadcast signal and a broadcast channel of the analog broadcast signal which broadcasts the same program as the broadcast channel. When the first detecting means detects the deterioration of the receiving state of the digital broadcast signal, the control means, based on the contents stored in the storage means, controls the analog broadcast related to the same program as the broadcast channel of the digital broadcast signal. Output broadcast signal.

Therefore, according to the broadcast receiving apparatus of the present invention,
Since the broadcast channel of the digital broadcast signal and the broadcast channel of the analog broadcast signal that broadcasts the same program as the broadcast channel are stored in association with each other, the reception state of the broadcast channel of the digital broadcast signal is degraded. Then, even if the broadcast channel becomes unreceivable, a situation in which a broadcast program is interrupted can be avoided by receiving a broadcast channel related to an analog broadcast signal having the same broadcast content.

The broadcast receiving apparatus according to the present invention has storage means for storing a desired broadcast channel among the broadcast channels of the analog broadcast signal, and the control means controls the first detection means to store the digital broadcast signal. When the deterioration of the reception state is detected, an analog broadcast signal related to the desired broadcast channel is output based on the storage content of the storage means.

Therefore, according to the broadcast receiving apparatus of the present invention,
Since the desired broadcast channel among the broadcast channels of the analog broadcast signal is stored, even if the reception state of the broadcast channel of the digital broadcast signal deteriorates and the broadcast channel becomes unreceivable, By receiving a broadcast channel related to an analog broadcast signal, a situation in which a broadcast program is interrupted can be avoided.

[0024] The broadcast receiving apparatus of the present invention includes a channel selecting means for selecting and receiving each broadcast channel of the digital broadcast signal and each broadcast channel of the analog broadcast signal.

Therefore, according to the broadcast receiving apparatus of the present invention,
Since the digital broadcasting signal and the analog broadcasting signal are provided with the tuning means for tuning and receiving, by one tuning means,
By sharing the tuner for analog broadcasting and tuner for digital broadcasting, the cost of the entire apparatus can be significantly reduced.

[0026]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a simulcast receiver according to an embodiment of the present invention. FIG. 1 is a block diagram showing a schematic configuration inside a simulcast receiver shown in the present embodiment.

The simulcast receiver 10 shown in FIG. 1 includes a receiving antenna 11 for receiving an incoming digital broadcast signal and an analog broadcast signal, and tuning the digital broadcast signal and the analog broadcast signal to obtain the digital broadcast signal and the analog broadcast signal. A television tuner 12 for converting an analog broadcast signal into a first intermediate frequency signal (hereinafter simply referred to as a first IF signal); a first IF signal of a digital broadcast signal converted by the TV tuner 12 or a first IF of an analog broadcast signal Switch select switch 13 for switching and selecting a signal
An analog signal processing unit 14 for demodulating analog broadcast by subjecting the first IF signal of the analog broadcast signal switched and selected by the switch select switch 13 to analog signal processing
A converter 21 for converting the first IF signal of the digital broadcast signal switched and selected by the changeover selection switch 13 into a second IF signal, and performing digital signal processing on the second IF signal of the digital broadcast signal converted by the converter 21 Digital signal processing unit 15 that demodulates digital broadcasting by applying
And an output changeover switch 16 for switching and selecting an analog broadcast demodulated by the analog signal processing section 14 or a digital broadcast demodulated by the digital signal processing section 15 as a video / audio output.

Further, the simulcast receiver 10 controls a tuning PLL unit 17 for selecting a channel tuned by the TV tuner 12 and a gain of an analog broadcast signal or a digital broadcast signal tuned by the TV tuner 12. It has an automatic gain switching selection switch 18 for switching and selecting an automatic gain control signal, a memory 19 for storing various information, and a control CPU 20 for controlling the whole simulcast receiver 10.

The analog signal processing section 14 detects the received electric field strength of the first IF signal relating to the analog broadcast signal, and notifies the control CPU 20 of the received electric field strength. The received electric field strength may be notified by an automatic gain control signal (AGC signal).

The converter 21 includes a tuning PLL unit 1.
An oscillation circuit 22 for oscillating a predetermined frequency signal in accordance with the channel selection signal from the digital signal 7;
And a mixer 23 that mixes the predetermined frequency signal from the digital broadcast signal 2 and generates a second IF signal related to the digital broadcast signal.

The digital signal processing unit 15 detects the BER of the second IF signal as the reception state of the digital broadcast signal, and notifies the control CPU 20 of the BER.

The TV tuner 12 shares a tuner for receiving analog broadcasts and digital broadcasts, and has the same first intermediate frequency band.

Further, an automatic gain changeover selection switch 18
Switches between the automatic gain control signal from the digital signal processing unit 15 and the automatic gain control signal from the analog signal processing unit 14.

As shown in FIG. 2, the memory 19 stores a digital broadcast channel (ch) and an analog broadcast channel (c) related to the same program as the broadcast channel.
h) is stored.

In another area of the memory 19, a preset broadcast channel (c) related to a desired analog broadcast is set.
h) is stored.

In FIG. 2, for example, program 1 is distributed by digital broadcast Ach and analog broadcast Dch, and program 2 is distributed by digital broadcast Bch and analog broadcast Ech. The program 3 is distributed only by the digital broadcast Cch.

The control CPU 20 includes a changeover selection switch 1
3, for controlling the switching of the output changeover switch 16 and the automatic gain changeover selection switch 18. For example, when analog broadcasting is being received, the changeover selection switch 13, the output changeover switch 16 and the automatic gain changeover selection switch 18 are set to the analog side. When the digital broadcast is being received, the switching selection switch 13 and the output switching switch 1 are selected.
6 and the automatic gain switching selection switch 18 are switched to the digital side.

Further, when the BER from the digital signal processing section 15 exceeds the reference value E, the control CPU 20 determines that digital signal processing such as error correction processing relating to the digital broadcast currently being received becomes impossible. In order to receive an analog broadcast, the selector switch 13, the output selector switch 16, and the automatic gain selector switch 18 are switched to the analog side.

When the received electric field strength from the analog signal processing unit 14 becomes equal to or more than the reference value S during the reception of the analog broadcast due to the digital broadcast reception failure, the control CPU 20 operates similarly to the reception state of the analog broadcast. When the receiving state of the digital broadcast is judged to be good, the switch 13 and the output switch 1 are switched to receive the digital broadcast.
6 and the automatic gain switching selection switch 18 are switched to the digital side.

Next, the operation of the simulcast receiver 10 shown in the present embodiment will be described. FIG. 3 is a flowchart showing the processing operation of control CPU 20 relating to the broadcast program following processing in simulcast receiver 10 shown in the present embodiment.

The broadcast program tracking process shown in FIG. 3 is a process for automatically tracking and receiving an analog broadcast when digital broadcast reception becomes impossible during digital broadcast reception.

The control CPU 20 shown in FIG.
By controlling the L unit 17, a broadcast program related to digital broadcasting is received (step S1). During reception of this digital broadcast, the BER of the second IF signal related to digital broadcasting from the digital signal processing unit 15 is detected. Then, it is determined whether or not this BER exceeds the reference value E (BER> E) (step S2).

If the BER exceeds the reference value E,
It is determined that the reception quality of the digital broadcast currently being received has deteriorated, and a broadcast program related to analog broadcasting having the same content as the broadcast program related to digital broadcast currently being received is stored in the memory 19.
Then, it is determined whether or not it is stored in the program correspondence table (step S3).

When it is determined that a broadcast program related to analog broadcasting having the same content is stored, a changeover switch is provided based on the program correspondence table in the memory 19 so as to receive the corresponding broadcast program related to analog broadcasting. 13, the output changeover switch 16 and the automatic gain changeover selection switch 18 are switched and selected on the analog side, and the broadcast program relating to the analog broadcast is received by controlling the tuning PLL unit 17 (step S4).

When receiving the broadcast program related to the analog broadcast, it is determined whether or not the received electric field strength of the broadcast program related to the analog broadcast currently being received is equal to or higher than the reference value S (step S5).

When the received electric field strength is equal to or higher than the reference value S, it is determined that the digital broadcast reception condition is good, and in step S1, switching is performed so as to receive the broadcast program related to the digital broadcast received immediately before. Selection switch 13, output changeover switch 16, and automatic gain changeover selection switch 18
To step S1 to switch to the digital broadcasting side.

In step S2, if the BER of the broadcast program related to the digital broadcast currently being received does not exceed the reference value E, the reception state of the digital broadcast is monitored while the reception of the digital broadcast is continued. continue.

If it is determined in step S3 that the broadcast program of the analog broadcast corresponding to the broadcast program related to the digital broadcast currently being received is not stored in the program correspondence table of the memory 19, it is stored in a predetermined area of the memory 19 in advance. In order to receive the desired broadcast program related to the stored analog broadcast, the switch 13, the output switch 16, and the automatic gain switch 18 are switched to the analog side, and the PLL tuning unit 17 is controlled. The program is received (step S6), and the process proceeds to step S5.

In step S5, if the received electric field strength of the broadcast program related to the currently received analog broadcast is not equal to or greater than the reference value S, the reception state related to the analog broadcast currently being received is continued while receiving the analog broadcast currently being received. Continue monitoring

According to the present embodiment, analog broadcast and digital broadcast can be received, and when the BER related to the digital broadcast currently being received exceeds the reference value E, the reception quality of the digital broadcast currently being received deteriorates. Because it was judged that it was a thing, I tried to receive analog broadcasting, so even if digital broadcasting became unreceivable during digital broadcasting reception,
By receiving an analog broadcast, interruption of a broadcast program can be avoided as much as possible, and by using the analog broadcast, a service area can be expanded.

Further, according to the present embodiment, during reception of an analog broadcast due to deterioration of the reception state of the digital broadcast, if the reception electric field intensity related to the analog broadcast becomes equal to or more than the reference value S, the reception state of the digital broadcast is also reduced. Judging that it has recovered, so as to receive the digital broadcast,
By receiving digital broadcasts as much as possible over analog broadcasts, it is possible to provide users with clearer reception image quality.

Next, a case will be described as an example where the simulcast receiver 10 shown in the present embodiment is adopted as an in-vehicle receiver.

For example, it is assumed that the simulcast receiver 10 receives the digital broadcast Ach shown in FIG. 2, and that the reception state is good and the reception image quality is good as shown by the line A in FIG.

When the vehicle equipped with the simulcast receiver 10 moves out of the broadcast reception area or in a direction behind an obstacle such as a tunnel, the reception state gradually deteriorates, and the reception screen is deteriorated. , Block distortion and mosquito noise occur, and as shown in line C of FIG.
Eventually, the digital broadcast Ach falls into an unreceivable state.

However, in the unreceivable state, the control CPU 20 of the simulcast receiver 10 has exceeded the limit of the error correction processing for the digital broadcast Ach. It is determined that the value exceeds the value E, and based on the program correspondence table shown in FIG. 2 stored in the memory 19, the switching selection switch 13 and the output switching switch 16 are received to receive the analog broadcast Dch having the same content as the digital broadcast Ach. By switching the automatic gain selection switch 18 to the analog side, the analog broadcast Dch is received and demodulated through the analog signal processing 14.

By receiving the analog broadcast Dch relating to the same content as the digital broadcast Ach in this way, the received image quality of the analog broadcast Dch is not very good, but the broadcast program is interrupted because it is not in the unreceivable state. It is possible to avoid such a situation.

Further, when the vehicle comes out of the shade of an obstacle or the like,
When the control CPU 20 determines that the reception electric field strength of the analog broadcast Dch has exceeded the reference value S, it also determines that the reception state of the digital broadcast has also become good, and in order to receive the digital broadcast Ach received immediately before. By switching the changeover selection switch 13, the output changeover switch 16 and the automatic gain changeover selection switch 18 to the digital side, the digital broadcast Ach is received and demodulated through the digital signal processing section 15.

Therefore, when the simulcast receiver 10 according to the present embodiment is adopted as an on-vehicle broadcast receiver, a clearer reception of digital broadcast or analog broadcast can be performed according to the radio wave condition during traveling. Broadcast of image quality can be provided to the user.

In the above embodiment, when the digital broadcast being received becomes unreceivable, the analog broadcast is automatically switched and received. However, it is notified on the monitor screen that the digital broadcast cannot be received. Thus, the user may be prompted to manually switch the reception of the analog broadcast. In this case, the user can arbitrarily select the reception switching.

In the above embodiment, the program correspondence table is stored in the memory 19 in advance. However, when the program correspondence table is multiplexed in an incoming broadcast signal, the broadcast signal is received. Each time, a program correspondence table may be extracted from the broadcast signal, and the extracted program correspondence table may be stored in the memory 19.

According to the simulcast receiver 10 shown in the above embodiment, digital broadcast or analog broadcast is received by one receiving antenna 11, but digital broadcasting or analog broadcasting is received by one receiving antenna. Broadcasting may be received, and a diversity function for receiving analog broadcasting with three receiving antennas may be provided.

Next, a simulcast receiver having such a diversity function will be described. FIG. 4 is a block diagram showing a schematic configuration inside a simulcast receiver having a diversity function.

A simulcast receiver 30 shown in FIG. 4 includes a receiving antenna 11a for receiving an incoming digital broadcast signal or analog broadcast signal, and three receiving antennas 11b, 11c, and 11d for receiving analog broadcast signals.
An antenna switching selection switch 31 for switching and selecting a broadcasting signal of each of the receiving antennas 11a to 11d, and a digital broadcasting signal and an analog broadcasting signal received through the antenna switching selection switch 31 are tuned so that the tuned analog broadcasting signal or A television tuner 12a for converting a digital broadcast signal into a first IF signal,
A switch selector switch 13a for switching and selecting the first IF signal of the analog broadcast signal or the first IF signal of the digital broadcast signal converted by the television tuner 12a, and a first IF of the analog broadcast signal switched and selected by the switch selector switch 13a. An analog signal processing unit 14a that demodulates an analog broadcast by performing analog signal processing on the signal, and a converter 2 that converts a first IF signal of a digital broadcast signal switched and selected by a switch selection switch 13a into a second IF signal
2a, a digital signal processing unit 15a for demodulating a digital broadcast by applying digital signal processing to a second IF signal of the digital broadcast signal, and an analog broadcast or digital signal processing unit 15a demodulated by an analog signal processing unit 14a.
An output changeover switch 16a for switching and selecting the digital broadcast demodulated by the TV tuner 12 as a video / audio output;
a, a channel selecting PLL unit 17a for selecting a channel, a memory 19a storing a program correspondence table as shown in FIG. 2, a diversity control unit 32 for controlling an antenna changeover selection switch 31, and a simulcast receiver 30. And a control CPU 20a for controlling the whole.

The analog signal processing section 14a detects the received electric field strength of the first IF signal relating to the analog broadcast signal, and notifies the control CPU 20a of the received electric field strength.

The digital signal processing section 15a detects the BER of the second IF signal relating to the digital broadcast signal and notifies the BER to the control CPU 20a.

The control CPU 20a controls the changeover selection switch 13a, the output changeover switch 16a, and the diversity control unit 32. For example, when analog broadcasting is being received, the changeover selection switch 13a and the output changeover switch 16a are set to analog. Side, and through the diversity control unit 32, each of the receiving antennas 11a to 11a to 1
1d, the switching control of the antenna switching selection switch 31 is performed so as to switch and select the analog broadcast signal having the optimum reception electric field strength.

When a digital broadcast is being received, the control CPU 20a switches and selects the changeover selection switch 13a and the output changeover switch 16a to the digital side, and receives the reception antenna 1 through the diversity control unit 32.
1a receives a digital broadcast signal.

According to the simulcast receiver 30 having such a diversity function, the digital signal processor 15
When the BER from a exceeds the reference value E, the switch selection switch 13a and the output switch 16a are switched to the analog side to receive the analog broadcast, and the diversity function is performed through the diversity control unit 32. Therefore, even if digital broadcasting becomes unreceivable during digital broadcasting reception, interruption of broadcast programs can be avoided as much as possible by receiving analog broadcasting, and the optimal analog broadcasting can be received by the diversity function. Can be.

Furthermore, such a simulcast receiver 3
According to 0, it is determined that the reception state of the digital broadcast signal has also been recovered when the reception electric field strength of the analog broadcast signal becomes equal to or more than the reference value S during the reception of the analog broadcast due to the deterioration of the reception state of the digital broadcast. , Changeover selection switch 13
a and the output changeover switch 16a are switched to the digital side, and the digital broadcast is received by the receiving antenna 11a through the diversity control unit 32. Therefore, the digital broadcast is more excellently received than the analog broadcast. The received image quality can be provided to the user.

[0070]

According to the broadcast receiving apparatus of the present invention configured as described above, an analog broadcast signal and a digital broadcast signal can be received, and the reception state of the digital broadcast signal is deteriorated, for example, error correction processing cannot be performed. In such a case, analog broadcast signals are received, so even if digital broadcasts become unreceivable during digital broadcast reception, it is possible to minimize the interruption of broadcast programs by receiving analog broadcasts. It is possible to expand the service area.

Further, according to the broadcast receiving apparatus of the present invention,
During the output of the analog broadcast signal accompanying the deterioration of the reception state of the digital broadcast signal, when the reception electric field strength of the analog broadcast signal becomes a predetermined level or more, it is determined that the reception state of the digital broadcast signal has also been recovered, and the digital Since a broadcast signal is output, a digital broadcast having better image quality and the like than an analog broadcast signal can be received as much as possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration inside a simulcast receiver showing an embodiment in a broadcast receiving apparatus of the present invention.

FIG. 2 is an explanatory diagram showing memory contents inside the simulcast broadcast receiver shown in the present embodiment.

FIG. 3 is a flowchart showing a processing operation of a control CPU relating to a broadcast program following process of the simulcast broadcast receiver shown in the present embodiment.

FIG. 4 is a block diagram showing a schematic configuration inside a simulcast receiver having a diversity function shown in another embodiment.

FIG. 5 is an explanatory diagram showing a relationship between reception states and reception image quality of general analog broadcasting and digital broadcasting.

FIG. 6 shows C with respect to BER related to each general modulation scheme.
FIG. 4 is an explanatory diagram showing a change characteristic of / N [dB].

FIG. 7 is an explanatory diagram showing a relationship between a general five-stage quality deterioration evaluation and BER.

[Explanation of symbols]

 10, 30 Simultaneous broadcast receiver (broadcast receiving device) 12, 12a TV tuner (tuning means, control means) 14, 14a Analog signal processing unit (second detecting means) 15, 15a Digital signal processing unit (first detecting means) 19, 19a Memory (storage means) 20, 20a Control CPU (control means)

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Claims (4)

[Claims] 1. A broadcast receiving apparatus for receiving a digital broadcast signal and an analog broadcast signal, comprising: first detection means for detecting a reception state of the digital broadcast signal; and a first detection means for detecting a reception electric field strength of the analog broadcast signal. 2 detecting means, and when the first detecting means detects the deterioration of the receiving state of the digital broadcast signal, it outputs the analog broadcast signal, and during the output of the analog broadcast signal, the second detecting means Control means for outputting the digital broadcast signal when the received electric field strength of the detected analog broadcast signal is equal to or higher than a predetermined level. 2. A storage unit that stores a broadcast channel of the digital broadcast signal and a broadcast channel of the analog broadcast signal that broadcasts the same program as the broadcast channel, the control unit comprising: When the first detecting means detects the deterioration of the reception state of the digital broadcast signal, outputting an analog broadcast signal relating to the same program as the broadcast channel of the digital broadcast signal based on the storage contents of the storage means. The broadcast receiving device according to claim 1, wherein: 3. A storage unit for storing a desired broadcast channel among broadcast channels of the analog broadcast signal, wherein the control unit detects deterioration of a reception state of the digital broadcast signal by the first detection unit. 2. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiver outputs an analog broadcast signal related to the desired broadcast channel based on the contents stored in the storage unit. 4. The radio communication apparatus according to claim 1, further comprising: tuning means for tuning and receiving each broadcast channel of said digital broadcast signal and each broadcast channel of said analog broadcast signal.
4. The broadcast receiving device according to 2 or 3.