WO2017195327A1

WO2017195327A1 - Broadcast reception apparatus

Info

Publication number: WO2017195327A1
Application number: PCT/JP2016/064153
Authority: WO
Inventors: 文哉中村
Original assignee: 三菱電機株式会社
Priority date: 2016-05-12
Filing date: 2016-05-12
Publication date: 2017-11-16
Also published as: JPWO2017195327A1; JP6580256B2

Abstract

According to the present invention, a linking control unit (20) determines whether it is necessary to update an alignment value stored in an alignment storage unit (21) on the basis of the elapsed time and/or the change in an FM broadcast reception state, after the alignment value had been stored in the alignment storage unit (21). An alignment value calculation unit (22) updates the alignment value stored in the alignment storage unit (21) when updating is determined to be necessary. A voice control unit (300) adjusts, by using the updated alignment value, the output state of FM broadcast voice data when a broadcast to be received is switched from a DAB to an FM broadcast.

Description

Broadcast receiver

This invention relates to a broadcast receiving apparatus for receiving a broadcast.

In Europe and the like, broadcast receiving apparatuses that receive DAB (Digital Audio Broadcasting) are widespread. This broadcast receiving device has a so-called DAB-FM link function that receives FM broadcasts that broadcast programs of the same content when the DAB reception state deteriorates.

However, in the DAB-FM link, the audio output state of the FM broadcast may be different from that of the DAB, and the audio output volume may change greatly when the DAB is switched to the FM broadcast. Such a change in the sound output state is not preferable because it causes the user to unnecessarily notice that the DAB has been switched to the FM broadcast, making the user feel uncomfortable.
Therefore, in the conventional broadcast receiving apparatus, the FM broadcast audio output state may be aligned to match the DAB audio output state before switching.

For example, in the broadcast receiving apparatus described in Patent Document 1, when an FM broadcast that broadcasts the same program as the received DAB is searched, the output status of the searched FM broadcast is displayed as the sound of the DAB being received. The alignment value to match the output state is measured.
Thus, the alignment value measured before switching is stored in the memory.
And this broadcast receiving apparatus aligns an output state using the alignment value previously stored in memory, when switching from DAB to FM broadcasting.
In this way, seamless switching is realized in which the FM broadcast audio output state after switching is little changed from the DAB audio output state before switching.

JP 2002-9647 A

In order to align the DAB audio output state with the FM broadcast audio output state, it is necessary to measure alignment values for various parameters related to the audio output state, and it takes ten seconds or more. It is normal. Therefore, in order to perform seamless switching as described above, it is necessary to wait for switching to FM broadcasting until alignment is completed. In this case, the user has to keep listening to the DAB sound whose reception quality has deteriorated and sound quality has deteriorated.

On the other hand, in the broadcast receiving apparatus described in Patent Document 1, alignment is performed using the alignment value stored in advance in the memory, and therefore the alignment value is not measured every time switching is performed. For this reason, it is possible to reduce the waiting time until seamless switching is performed for the time required for measuring the alignment value.

However, the output state of the broadcast audio may change accordingly when the reception state such as the reception quality of the broadcast or the received electric field strength changes greatly.
For example, when a broadcast receiving device mounted on a moving body receives a broadcast while moving, if the reception state changes suddenly with the movement, the output volume of the received broadcast changes accordingly. Sometimes. For this reason, when the broadcast reception state changes greatly after the alignment value is stored in the memory, there is a possibility that the audio output state cannot be adjusted appropriately even if the alignment value stored in the memory is used.

The present invention solves the above-described problem, and suppresses a change in the output state of received data when a program having the same content is received by switching from one broadcast to another broadcast between broadcasts having different reception frequencies. An object of the present invention is to obtain a broadcast receiving apparatus that can be used.

The broadcast receiving apparatus according to the present invention includes an alignment measurement unit, an alignment storage unit, a link control unit, an alignment update unit, and an output control unit.
When the alignment measurement unit switches the reception target from the received first broadcast to the second broadcast including the same content program having a reception frequency different from that of the first broadcast, the received data of the second broadcast An alignment value that matches the output state for the output state for the received data of the first broadcast before switching is measured. The alignment storage unit stores an alignment value for the reception data of the second broadcast, which is an alternative candidate station from the first broadcast, measured in advance by the alignment measurement unit. The link control unit controls the switching of the reception target from the first broadcast to the second broadcast, and changes in the elapsed time and the reception state of the second broadcast after the alignment value is stored in the alignment storage unit Whether or not the alignment value stored in the alignment storage unit needs to be updated is determined based on at least one of the above. When the link control unit determines that the update is necessary, the alignment update unit updates the alignment value stored in the alignment storage unit. The output control unit adjusts the output state of the reception data of the second broadcast when the reception target is switched from the first broadcast to the second broadcast, using the alignment value stored in the alignment storage unit.

According to the present invention, when the reception target is switched from the received first broadcast to the second broadcast including the same content program having a reception frequency different from that of the first broadcast, an alignment prepared in advance is provided. The value is appropriately updated to adjust the output state of the reception data of the second broadcast.
In this way, it is possible to suppress a change in the output state of the received data when the reception target is switched from the first broadcast to the second broadcast.

It is a block diagram which shows the structure of the broadcast receiver which concerns on Embodiment 1 of this invention. 3 is a flowchart showing an operation of the broadcast receiving apparatus according to the first embodiment.

Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a broadcast receiving apparatus 1 according to Embodiment 1 of the present invention.
The broadcast receiving apparatus 1 can receive both DAB and FM broadcasts, for example, and is installed or brought into a moving body such as a vehicle and receives the broadcast while moving with the moving body.
DAB embodies the first broadcast in the present invention, and FM broadcast embodies the second broadcast in the present invention.

The broadcast receiving apparatus 1 includes a system microcomputer 2 and a decoder microcomputer 3.
The two DAB tuners 4 a and 4 b and the FM tuner 4 c are controlled by the system microcomputer 2, and the decoder microcomputer 3 controls audio output from the external amplifier 5 to the speaker 6.

The system microcomputer 2 is a microcomputer that controls the reception operation using the tuners 4a and 4b and the FM tuner 4c. As functions thereof, a link control unit 20, an alignment storage unit 21, an alignment value calculation unit 22, a tuner control unit 23, and a timer 24 are provided. The decoder microcomputer 3 includes a decoder unit 30 that decodes broadcast signals received by the DAB tuners 4a and 4b. The decoder unit 30 includes a voice control unit 300, an electric field strength measurement unit 301, a reception quality measurement unit 302, and an alignment measurement unit 303 as functions thereof.

The tuners 4a and 4b extract a broadcast signal having a reception frequency set by the tuner control unit 23 from a DAB radio wave received by a DAB antenna (not shown), perform demodulation processing on the broadcast signal, and perform audio processing. Get the data.
For example, one of the tuner 4a and the tuner 4b is a main tuner and the other is a sub tuner. While the main tuner is receiving a DAB broadcast, the sub tuner searches for other DAB broadcast stations that can be received. To do.

The FM tuner 4c extracts a broadcast signal having a reception frequency set by the tuner control unit 23 from radio waves received by an FM broadcast antenna (not shown), executes demodulation processing on the broadcast signal, and outputs audio data. get. Note that this audio data is an example of received data in the present invention. Further, the FM tuner 4c searches for FM broadcasts including programs having the same contents as the DAB received by any of the tuners 4a and 4b in the background.

The external amplifier 5 amplifies the audio signal input from the audio control unit 300 and outputs it to the speaker 6. The degree of amplification of the audio signal by the external amplifier 5 is set by the audio control unit 300.
The speaker 6 is a speaker that outputs an audio signal amplified by the external amplifier 5. For example, when the broadcast receiving device 1 is a vehicle-mounted broadcast receiving device, the speaker 6 is provided in the vehicle interior. This is realized by a vehicle-mounted speaker.

The link control unit 20 controls the DAB-FM link for switching the reception target from the received DAB to the FM broadcast including the same content program.
Furthermore, the link control unit 20 is stored in the alignment storage unit 21 based on at least one of the elapsed time and the change in the FM broadcast reception state since the alignment value is stored in the alignment storage unit 21. It is determined whether or not the alignment value to be updated is necessary.

Here, the alignment value is used to match the audio output state when the broadcast receiving apparatus 1 receives the FM broadcast of the switching candidate with the DAB output state before the switching in the DAB-FM link. The sound output state is specified by parameters such as output volume and phase, for example. That is, the alignment value is an output volume difference and phase difference between DAB sound and FM broadcast sound. When outputting the FM candidate sound as a switching candidate, the signal amplification degree is reduced so that these differences are reduced. The phase is adjusted.

Further, the link control unit 20 determines that the alignment value needs to be updated when the time elapsed after the alignment value is stored in the alignment storage unit 21 becomes equal to or longer than a predetermined time.
On the other hand, the link control unit 20 does not perform the alignment even when the elapsed time is less than a certain time but the level indicating the FM broadcast reception state has changed to a threshold value or more after the alignment value is stored in the alignment storage unit 21. It is determined that the value needs to be updated.
Here, the above-described reception state is a state specified by parameters such as reception quality of FM broadcast and reception electric field strength, and when the level difference between these parameters is equal to or greater than a threshold value, It is determined that the output state has also changed.

The alignment storage unit 21 is a storage unit in which the alignment value measured by the alignment measurement unit 303 is stored. For example, information indicating one or a plurality of FM broadcast stations serving as alternative candidate stations when the reception state of the received DAB deteriorates and alignment values corresponding to the information are stored in list format data. The

The alignment value calculation unit 22 is a component that embodies the alignment update unit in the present invention, and performs a calculation for updating the alignment value stored in the alignment storage unit 21. Note that the alignment measurement unit 303 acquires the value of the parameter indicating the output state of the sound of DAB and FM broadcast for a predetermined number of times of alignment acquisition, and uses the average value as the alignment value. When the link control unit 20 determines that the alignment value needs to be updated, the link control unit 20 instructs the alignment measurement unit 303 to newly measure the alignment value less than the number of times of alignment acquisition.
The alignment value calculation unit 22 averages the alignment value newly measured by the alignment measurement unit 303 and the alignment values for the remaining number of times of the alignment acquisition stored in the alignment storage unit 21. Is an updated value.
Thereby, since the number of alignment values to be newly measured by the alignment measuring unit 303 is reduced, the time required for updating the alignment value can be significantly shortened.

The tuner control unit 23 controls the tuning operation of the tuners 4a and 4b and the FM tuner 4c. In the DAB-FM link, the tuner control unit 23 instructs the FM tuner 4c to select the alternative candidate station designated by the link control unit 20.
The timer 24 measures the elapsed time after the alignment value is stored in the alignment storage unit 21. The timing information of the timer 24 is referred to by the link control unit 20.

The audio control unit 300 is a component that embodies the output control unit of the present invention, and uses the alignment value stored in the alignment storage unit 21 to adjust the output state of the audio of the FM broadcast switched from the DAB. To do. Thus, since the audio | voice control part 300 uses the alignment value previously stored in the alignment storage part 21, it does not need to measure an alignment value for every switching. For this reason, the waiting time until the seamless switching from DAB to FM broadcasting can be shortened by the time required for the new measurement of the alignment value.

The electric field strength measurement unit 301 measures the received electric field strength of the broadcast signal received by each of the tuners 4a and 4b and the FM tuner 4c.
The reception quality measuring unit 302 measures the reception quality of the broadcast signal received by each of the tuners 4a and 4b and the FM tuner 4c.
The reception quality is a parameter that is an indicator of the reception quality of the received broadcast signal, and includes, for example, a bit error rate of a signal obtained by decoding a demodulated signal of the broadcast signal.

The alignment measurement unit 303 measures an alignment value that matches the output state of the FM broadcast sound of the alternative candidate station with the output state of the DAB before switching.
For example, an output volume difference and a phase difference between DAB audio data and FM broadcast audio data obtained by decoding a DAB broadcast signal and an FM broadcast signal are measured as alignment values.

Note that the output audio difference, phase difference, and the like may deviate from their original values due to the influence of noise.
For this reason, the alignment measurement unit 303 synchronizes the FM broadcast audio data of the alternative candidate station with the received DAB audio data, and sets the output volume and phase to the predetermined number of alignment acquisitions. Only, and the average of these values is used as the alignment value.

Next, the operation will be described.
FIG. 2 is a flowchart showing the operation of the broadcast receiving apparatus 1, and shows a series of processing of the DAB-FM link in the first embodiment.
The tuner 4a selects and receives the DAB service A broadcast designated by the tuner control unit 23 (step ST1). At this time, the link control unit 20 instructs the tuner control unit 23 to search for an alternative candidate station that is performing FM broadcasting including a program having the same content as the service A.

The tuner control unit 23 controls the FM tuner 4c in accordance with an instruction from the link control unit 20, thereby searching for an alternative candidate station that is performing FM broadcasting including a program having the same content as the service A (step ST2).
When the FM tuner 4c receives the FM broadcast of the alternative candidate station, the FM tuner 4c demodulates the received signal to reproduce the audio data. This audio data is output to the alignment measurement unit 303.
The alignment measurement unit 303 notifies the link control unit 20 that the voice data received from the alternative candidate station has been input.

Next, the link control unit 20 determines whether or not the alignment value list stored in the alignment storage unit 21 includes the alignment value between the audio data of the service A and the audio data received from the alternative candidate station. Is confirmed (step ST3).
When the alignment value for the alternative candidate station is not in the list of the alignment storage unit 21 (step ST3; NO), the link control unit 20 causes the alignment measurement unit 303 to measure the alignment value for the alternative candidate station. To instruct.

The alignment measurement unit 303 acquires broadcast audio data received from the alternative candidate station by the FM tuner 4c, acquires DAB audio data received by the tuner 4a, and measures these alignment values (step). ST4).
Here, the alignment measurement unit 303 calculates an alignment value according to the following equation (1). In the following formula (1), z is an alignment value used for adjusting the voice output state in the DAB-FM link. x is an alignment value acquired from the audio data for a predetermined number y of alignment acquisitions.
z = (x ₁ + x ₂ + x ₃ +... + x _(y−1) + x _y ) / y (1)

For example, when acquiring the alignment value of the audio output volume, the alignment measurement unit 303 synchronizes the broadcast audio data received from the alternative candidate station with the DAB audio data, and the alignment acquisition count y is obtained. The output volume difference is measured at each point.
These output volume difference, in the formula _{_{_{(1), x 1, x}}} 2, x 3, ···, x (y-1), the _{x y.} The alignment measuring unit 303 calculates the average value of these output volume differences as the final alignment value according to the above equation (1). In this way, the alignment value is calculated for each parameter related to the sound output state.

The alignment value measured in step ST4 is output from the alignment measurement unit 303 to the link control unit 20, and is stored in the alignment storage unit 21 by the link control unit 20 (step ST5). Thereafter, the process proceeds to step ST12.

On the other hand, when the alignment value for the alternative candidate station is in the alignment storage unit 21 (step ST3; YES), the process proceeds to step ST6.
In step ST <b> 6, the link control unit 20 refers to the timing information of the timer 24 to determine whether or not a certain time has elapsed since the alignment value is stored in the list of the alignment storage unit 21. Here, the fixed time is an upper limit time during which the alignment value is considered to be effective, and for example, a time of about 10 minutes is set.

The timer 24 measures the time elapsed from the storage time in association with the identification information of the alternative candidate station every time the alignment value of the alternative candidate station is stored in the list of the alignment storage unit 21. Therefore, the link control unit 20 can confirm the elapsed time since the alignment value is stored in the list of the alignment storage unit 21 by referring to the time measurement information of the timer 24.

When the elapsed time since the alignment value is stored in the list is equal to or longer than a certain time (step ST6; YES), the link control unit 20 determines that the alignment value stored in the list needs to be updated, and the alignment value calculation unit. 22 is instructed to update the alignment value.
When the alignment value calculation unit 22 receives an update instruction from the link control unit 20, the alignment value calculation unit 22 updates the alignment value according to the following equation (2).
In the following formula (2), “a” is the number of times of update acquisition that is smaller than the number of times of alignment acquisition “y”, for example, y / 2. Further, p is the alignment value of the alternative candidate station stored in the list of the alignment storage unit 21.
z = (a × p + x ₁ + x ₂ + x ₃ +... + x _(a−1) + x _a ) / y (2)

For example, when the link control unit 20 determines that the alignment value needs to be updated, the link control unit 20 instructs the alignment measurement unit 303 to newly measure an alignment value for the number of acquisition times a for update that is smaller than the number of times of alignment acquisition y.
The alignment value calculation unit 22 reads the alignment value of the alternative candidate station from the list in the alignment storage unit 21 (step ST7).
Next, the alignment value calculation unit 22 updates the value obtained by averaging the alignment value newly measured with the number of acquisitions a and the alignment value read from the list of the alignment storage unit 21 according to the above formula (2). (Step ST8).
As described above, in the alignment value update, the alignment value to be newly measured is reduced using the alignment value stored in the alignment storage unit 21. As a result, the time required for updating the alignment value can be significantly reduced.

The alignment value updated in step ST8 is output from the alignment value calculation unit 22 to the link control unit 20, and is stored in the alignment storage unit 21 by the link control unit 20 (step ST9). Thereafter, the process proceeds to step ST12.

On the other hand, when the elapsed time since the alignment value is stored in the list is less than the predetermined time (step ST6; NO), the process proceeds to step ST10.
In step ST10, the link control unit 20 determines whether or not the reception state is constant after the alignment value is stored in the list of the alignment storage unit 21.
For example, the link control unit 20 corresponds to the amount of change in the FM broadcast reception field strength measured by the field strength measurement unit 301 and the amount of change in the FM broadcast reception quality measured by the reception quality measurement unit 302, respectively. Compare with the threshold value. If there is a change amount equal to or greater than the threshold, it is determined that the reception state is not constant.
Alternatively, when the alternative candidate station is not searched by the FM tuner 4c after the alignment value of the alternative candidate station is stored in the alignment storage unit 21, it may be determined that the reception state is not constant.

When the elapsed time is less than the predetermined time since the alignment value of the alternative candidate station is stored in the list of the alignment storage unit 21, but the reception state is not constant (step ST10; NO), the link control unit 20 It is determined that the alignment value needs to be updated.
That is, the link control unit 20 instructs the alignment value calculation unit 22 to update the alignment value. Thereby, the update process of the alignment value from step ST7 mentioned above is implemented.

If the elapsed time is less than the predetermined time since the alignment value of the alternative candidate station is stored in the list of the alignment storage unit 21 and the reception state is constant (step ST10; YES), the process proceeds to step ST11. Transition to processing.
In step ST11, the link control unit 20 determines whether or not the reception state of the DAB received by the tuner 4a has deteriorated.
For example, the voice control unit 300 compares the received electric field strength of DAB measured by the electric field strength measuring unit 301 and the received quality of DAB measured by the received quality measuring unit 302 with the corresponding allowable ranges. The voice control unit 300 determines that the DAB reception state has deteriorated if any of these is out of the allowable range.

If the DAB reception state has not deteriorated (step ST11; NO), the DAB-FM link processing is terminated. The series of processes shown in FIG. 2 is executed when reception is switched to regular or another DAB broadcast.
On the other hand, when the DAB reception state deteriorates (step ST11; YES), the link control unit 20 proceeds to the DAB-FM link process shown in step ST12.

In step ST12, the link control unit 20 instructs the tuner control unit 23 to switch the reception target to the FM broadcast from the alternative candidate station.
The tuner control unit 23 instructs the FM tuner 4c to select the alternative candidate station designated by the link control unit 20. The FM tuner 4 c extracts an FM broadcast signal having a reception frequency set by the tuner control unit 23 from the radio wave received by the FM broadcast antenna, and outputs the FM broadcast signal to the audio control unit 300.

The audio control unit 300 uses the alignment values stored in the alignment storage unit 21 to adjust the output state of the audio data before the FM broadcast audio data switched from the DAB is output from the speaker 6.
Here, the alignment value read from the list is the alignment value of the alternative candidate station measured in step ST4 or the alignment value of the alternative candidate station updated in step ST8.

For example, in the case of the output volume alignment value, the audio control unit 300 amplifies the alignment value to be 0 so that the output volume of the FM broadcast audio data matches the output volume of the DAB audio data before switching. The rate is set to the external amplifier 5. The external amplifier 5 amplifies the FM broadcast audio data with the amplification factor set by the audio control unit 300, and then outputs it to the speaker 6. As a result, the speaker 6 outputs FM broadcast sound at an output volume that is not different from the DAB sound.

In FIG. 2, as an alignment value update determination, whether or not the elapsed time is equal to or longer than a certain time and whether or not the reception state is constant are treated as a series of processes, but the present invention is not limited to this. . For example, the configuration may be such that any one of these determination processes is performed, and even in this way, the same effect as described above can be obtained.

As described above, in the broadcast receiving apparatus 1 according to the first embodiment, the output state of the FM broadcast audio data is adjusted using the alignment value stored in advance in the alignment storage unit 21 by switching from DAB to FM broadcast. . Thereby, the waiting time until the seamless switching from DAB to FM broadcasting can be shortened. Moreover, since the alignment value stored in the alignment storage unit 21 is appropriately updated, it is possible to appropriately suppress the change in the output state of the sound when switching to the FM broadcast.

In the broadcast receiving device 1 according to Embodiment 1, the link control unit 20 determines that the update is necessary when the elapsed time after the alignment value is stored in the alignment storage unit 21 is equal to or longer than the upper limit time. Thereby, it is possible to appropriately determine the alignment value that needs to be updated.

Furthermore, in the broadcast receiving apparatus 1 according to the first embodiment, the link control unit 20 has the elapsed time less than the upper limit time, but after the alignment value is stored in the alignment storage unit 21, the FM broadcast reception state is a threshold value. When it changes above, it determines with update required. Thereby, it is possible to appropriately determine the alignment value that needs to be updated.

Furthermore, in the broadcast receiving apparatus 1 according to the first embodiment, the link control unit 20 determines that the elapsed time is less than the allowable time and the change in the FM broadcast reception state after the alignment value is stored in the alignment storage unit 21 is a threshold value. If it is less than, it is determined that the update is not allowed. Thereby, it is possible to appropriately determine the alignment value that needs to be updated.

Furthermore, in the broadcast receiving apparatus 1 according to Embodiment 1, the alignment measurement unit 303 acquires a value obtained by averaging the parameter value indicating the output state by the number of times of alignment acquisition y, and sets the average value as the alignment value. The alignment value calculation unit 22 sets an average value of the alignment value newly measured at the number of times a smaller than the number of times of alignment acquisition y and the alignment value stored in the alignment storage unit 21 as an update value. With this configuration, the number of alignment values to be newly measured by the alignment measurement unit 303 is reduced, and the time required for updating the alignment values can be greatly shortened.

Although the DAB-FM link has been described so far, the present invention is not limited to this. For example, the present invention can also be applied to a so-called DAB-DAB link that receives a DAB broadcasting a program having the same content when the DAB reception state deteriorates.
Further, the present invention can be applied to services other than DAB such as HD (High Definition) radio.
Furthermore, although radio broadcasting has been described so far, the present invention can also be applied to television broadcasting.
That is, the present invention can be applied to any function that switches the reception target from the first broadcast that is received to the second broadcast that includes a program with the same content that has a different reception frequency from that of the first broadcast. .

In the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted within the scope of the invention.

The broadcast receiving apparatus according to the present invention can suppress a change in the output state when a program having the same content is switched from one broadcast to the other broadcast and received between broadcasts having different reception frequencies. It is suitable for an in-vehicle broadcast receiver that may move to other areas.

1 broadcast receiving device, 2 system microcomputer, 3 decoder microcomputer, 4a, 4b tuner, 4c FM tuner, 5 external amplifier, 6 speakers, 20 link control unit, 21 alignment storage unit, 22 alignment value calculation unit, 23 tuner control unit, 24 timer, 30 decoder unit, 300 audio control unit, 301 electric field strength measurement unit, 302 reception quality measurement unit, 303 alignment measurement unit.

Claims

When the reception target is switched from the received first broadcast to the second broadcast including the same content program having a reception frequency different from that of the first broadcast, the output state of the reception data of the second broadcast , An alignment measurement unit that measures an alignment value to match the output state of the received data of the first broadcast before switching,
An alignment storage unit that stores pre-measured alignment values for received data of the second broadcast, which is a candidate station for replacement from the first broadcast, measured in advance by the alignment measurement unit;
The switching of the reception target from the first broadcast to the second broadcast is controlled, and the elapsed time and the change in the reception state of the second broadcast since the alignment value is stored in the alignment storage unit A link control unit that determines whether or not the alignment value stored in the alignment storage unit needs to be updated based on at least one of
An alignment update unit that updates the alignment value stored in the alignment storage unit when it is determined that the link control unit needs to be updated;
An output control unit that adjusts an output state of received data of the second broadcast when the reception target is switched from the first broadcast to the second broadcast, using the alignment value stored in the alignment storage unit And a broadcast receiving apparatus.
The broadcast according to claim 1, wherein the link control unit determines that the update is necessary when an elapsed time after the alignment value is stored in the alignment storage unit is equal to or longer than a predetermined upper limit time. Receiver device.
The link control unit determines that updating is necessary when the elapsed time is less than the upper limit time but the reception state of the second broadcast has changed to a threshold value or more after the alignment value is stored in the alignment storage unit. The broadcast receiving apparatus according to claim 2, wherein:
The link control unit is updated when the elapsed time is less than the allowable time and the change in the reception state of the second broadcast is less than the threshold after the alignment value is stored in the alignment storage unit. The broadcast receiving apparatus according to claim 2, wherein the determination is made as “No”.
The alignment measurement unit acquires a value of a parameter indicating an output state by a predetermined number of alignment acquisitions and averages the value as an alignment value,
The alignment update unit is stored in the alignment storage unit and the alignment value newly measured by the alignment measurement unit less than the number of times of alignment acquisition when the link control unit determines that the update is necessary. The broadcast receiving apparatus according to claim 1, wherein a value obtained by averaging the alignment values is used as an update value.
The first broadcast is a digital audio broadcast;
The broadcast receiving apparatus according to claim 1, wherein the second broadcast is an FM broadcast.