JP6202884B2 - Broadcast receiver - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that is mounted on a moving body such as a vehicle and receives broadcast waves.

In a broadcast receiving device that is mounted on a moving body such as a vehicle and receives radio broadcasts, the reception quality of other stations is determined while receiving radio broadcasts of a certain station, and stations that are determined to be receivable are determined. Some have a station list function for storing in a list.
When performing the station list function with a single tuner broadcast receiver, it is necessary to temporarily tune to the other station from the station receiving the radio broadcast in order to check the reception quality of the other station (this operation is referred to below). Called fore-check).
For example, when performing a forecheck while receiving an analog radio broadcast, the radio sound being listened to feels uncomfortable because noise is generated due to a loss of synchronization with the station currently receiving the radio broadcast.

  Patent Document 1 discloses a vehicle-mounted receiving device having a station list function. In this receiving apparatus, when a moving body such as a vehicle is in an area where reception is difficult, the updating operation of the station list is suppressed. Thereby, even if the number of receivable stations decreases due to a change in the reception environment around the vehicle, efficient channel selection can be performed.

JP 2010-268333 A

In the conventional technique represented by Patent Document 1, forecheck is executed regardless of the radio sound listening environment in the passenger compartment. Therefore, a single tuner broadcast receiving apparatus is connected to a broadcasting station that is currently receiving a radio broadcast. Occurs, and noise is mixed in the radio sound being listened to.
In particular, when the listening environment of the radio sound in the passenger compartment is good, there is a problem that noise mixed in the radio sound is noticeably increased because there is little ambient noise that hinders the listening of the radio sound.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a broadcast receiving apparatus that can reduce a sense of incongruity caused by a forecheck in broadcast audio being received.

The broadcast receiving apparatus according to the present invention is a broadcast receiving apparatus that is mounted on a mobile body and receives a broadcast, and sequentially selects a broadcast station that is different from the broadcast station that is temporarily receiving the broadcast while receiving the broadcast. The forecheck execution unit that determines the broadcasting stations that can be received by the station, the listening environment determination unit that determines whether or not the listening environment of the broadcast sound in the mobile body is good, and the listening environment determination unit And a control unit that operates the forecheck execution unit when it is determined that the environment is not good, and stops the operation of the forecheck execution unit when it is determined that the listening environment in the moving body is good.

  According to the present invention, there is an effect that it is possible to reduce a sense of incongruity caused by a forecheck in broadcast audio being received.

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

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a broadcast receiving apparatus according to Embodiment 1 of the present invention. In FIG. 1, a broadcast receiving apparatus 1 is a broadcast receiving apparatus that is mounted on a moving body (for example, a vehicle) and receives a radio broadcast signal (RF signal). A radio tuner 3 that is connected to an antenna 2 and a CD mechanical unit 4. , A USB memory 5, a DSP (Digital Signal Processor) 6, and an audio output unit 7 connected to a speaker 8.

  The radio tuner 3 receives the RF signal received by the antenna 2, performs detection and demodulation processing, and outputs the demodulated signal to the DSP 6. The CD mechanism unit 4 reads out a sound signal recorded on a CD, DVD, BD disc or the like, performs demodulation processing, and outputs a sound demodulated signal to the DSP 6. A sound signal is recorded in the USB memory 5, and the sound signal is read out by the DSP 6 and subjected to demodulation processing to obtain a sound demodulated signal.

  The DSP 6 selects an audio demodulated signal to be output from audio demodulated signals input from a plurality of audio sources (radio tuner 3, CD mechanism unit 4, USB memory 5), and outputs the selected audio demodulated signal to the audio output unit 7. The audio output unit 7 converts the demodulated signal input from the DSP 6 into an audio signal in a form suitable for the output of the speaker 8. The speaker 8 radiates the sound signal converted by the sound output unit 7 as a sound wave.

  FIG. 2 is a block diagram showing a configuration of the DSP according to the first embodiment. 2, the DSP 6 includes a forecheck execution unit 60, an external I / F unit 61, a listening environment determination unit 62, a drive I / F unit 63, a memory I / F unit 64, and a control unit 65. Note that the components shown in FIG. 2 are realized as processing means in which software and hardware cooperate by the DSP 6 executing a program describing the functions of these components.

  The forecheck execution unit 60 is a forecheck execution unit that determines a broadcast station that can be received by sequentially selecting a broadcast station different from the broadcast station that the radio tuner 3 is receiving. Since the broadcast receiving apparatus 1 is a single tuner, the radio tuner 3 performs a station list function using only the antenna 2. At this time, the forecheck execution unit 60 controls the radio tuner 3 to temporarily remove the tuning of the broadcasting station that is currently receiving the radio broadcast and temporarily tune to the other broadcasting stations to be checked.

  The external I / F unit 61 is an interface that relays information exchange between the vehicle control unit mounted on the vehicle and the listening environment determination unit 62, and includes vehicle information and vehicle interior that indicate the running state of the vehicle from the vehicle side. The vehicle internal information indicating the environmental state is input. The vehicle information indicating the running state of the vehicle includes, for example, the presence / absence of operation of the engine that drives the vehicle, the presence / absence of the running speed of the vehicle, and the on / off signal of the parking brake. Further, the vehicle interior information includes, for example, a vehicle interior noise detection result by an active noise control device that uses the vehicle interior as a control target space.

The listening environment determination unit 62 determines whether or not the listening environment of the broadcast sound in the vehicle interior is good based on the vehicle information and the vehicle internal information acquired from the vehicle side by the external I / F unit 61.
If the vehicle information does not indicate an operating state that generates noise in the passenger compartment, for example, if the vehicle is not running with the engine running, noise caused by engine rotation and wheel vibrations received from the road Therefore, it is determined that the sound listening environment is good. In addition, when the vehicle interior information indicates a state in which no noise is generated in the vehicle interior, for example, when it is determined by the active noise control device provided in the vehicle interior that no noise is generated in the vehicle interior, The listening environment is determined to be good.

The drive I / F unit 63 is an interface that relays the exchange of information between the CD mechanism unit 4 and the control unit 65. The CD, DVD, and BD disc playback control signals are input from the control unit 65, and the CD mechanism A read signal is input from the unit 4.
The memory I / F unit 64 is an interface that relays information exchange between the USB memory 5 and the control unit 65. The read control signal and the write data are input from the control unit 65, and the read signal is received from the USB memory 5. Entered.

  The control unit 65 controls execution of the fore check by the fore check execution unit 60, and also performs a demodulation process of a recording signal of a CD, a DVD, and a BD disc via the drive I / F unit 63, and a memory I / F unit 64. And a controller that reads out the recording data from the USB memory 5. In addition, as a specific operation according to the present invention, the control unit 65 stops the operation of the forecheck execution unit 60 when the listening environment determination unit 62 determines that the listening environment in the vehicle interior is good.

Next, the operation will be described.
FIG. 3 is a flowchart showing the operation of the broadcast receiving apparatus according to the first embodiment.
First, the listening environment determination unit 62 determines whether or not the engine is operating based on the engine operation information acquired via the external I / F unit 61. From this result, the listening environment for the sound in the vehicle compartment is good. It is determined whether or not (step ST1). Here, when the engine is operating (step ST1; YES), it is determined that noise due to the rotation of the engine is generated and the sound listening environment in the passenger compartment is not good. In this case, the noise caused by the engine rotation cancels out the uncomfortable feeling of radio sound generated by the forecheck.
Therefore, the listening environment determination unit 62 notifies the control unit 65 that the listening environment for the sound in the passenger compartment is not good. When the control unit 65 receives a notification that the sound listening environment in the passenger compartment is not good, the control unit 65 controls the fore check execution unit 60 to perform the fore check (step ST2).

On the other hand, when the engine is not operating (step ST1; NO), the listening environment determination unit 62 determines whether or not the vehicle is traveling based on the vehicle speed information acquired through the external I / F unit 61. From this result, it is determined whether or not the listening environment for the sound in the vehicle compartment is good (step ST3). When the vehicle is a hybrid vehicle, the engine and the motor are switched appropriately to improve fuel efficiency. When the vehicle is running by the motor even when the engine operation is stopped, it is determined that road noise due to the vibration of the wheels received from the road is generated and the sound listening environment in the passenger compartment is not good. In this case, as in the engine operation, the discomfort of the radio sound generated by the forecheck is canceled by road noise.
Therefore, when the vehicle speed is present even when the engine is not operating (step ST3; YES), the listening environment determination unit 62 determines that the vehicle is a hybrid vehicle and the vehicle is running with a motor, The controller 65 is notified that the sound listening environment is not good.
When the control unit 65 receives a notification that the sound listening environment in the passenger compartment is not good, the control unit 65 controls the fore check execution unit 60 to perform the fore check (step ST2).

If the engine is not operating and there is no vehicle speed (step ST3; NO), the listening environment determination unit 62 determines whether the vehicle is parked based on the parking brake information acquired via the external I / F unit 61. It is determined whether or not the listening environment for the sound in the passenger compartment is good (step ST4). When the vehicle is a hybrid vehicle, even if the engine is not operating and the vehicle is not running with a motor, the vehicle is immediately running with the engine or motor simply by waiting for a signal and stopping the vehicle. It may be in a state to start. For this reason, if the parking brake is not turned on and the vehicle is not parked, it is determined that road noise can occur due to traveling of the vehicle, and it is determined that the sound listening environment in the passenger compartment is not good.
Therefore, even if the engine is not operating or there is no vehicle speed, if the parking brake is off (step ST4; YES), the listening environment determination unit 62 determines that the vehicle can travel. Then, the control unit 65 is notified that the listening environment for the voice in the passenger compartment can immediately become unfavorable. When the control unit 65 receives a notification that the sound listening environment in the vehicle interior may be in a poor state, the control unit 65 controls the fore check execution unit 60 to perform the fore check (step ST2).

When the engine is not operating, there is no vehicle speed, and the parking brake is on (step ST4; NO), the listening environment determination unit 62 is based on vehicle interior noise information acquired through the external I / F unit 61. Thus, it is determined whether or not the listening environment for the sound in the passenger compartment is good (step ST5). For example, if the noise measured by the active noise control device or the echo canceller based on the microphone input signal in the passenger compartment exceeds a predetermined sound pressure level (step ST5; YES), the radio generated by the forecheck due to this noise The sense of discomfort in voice is offset.
Therefore, the listening environment determination unit 62 notifies the control unit 65 that the listening environment for the sound in the passenger compartment is not good. When the control unit 65 receives a notification that the sound listening environment in the passenger compartment is not good, the control unit 65 controls the fore check execution unit 60 to perform the fore check (step ST2).

  On the other hand, when not meeting all the determination conditions that deteriorate the listening environment described above (step ST5; NO), the listening environment determination unit 62 determines that the sound listening environment is good, and the control unit 65 is notified. When the control unit 65 receives a notification that the sound listening environment in the vehicle interior is good, the control unit 65 determines that the radio sound is uncomfortable due to the forecheck, and controls the forecheck execution unit 60 to control the foreground. The check is stopped (step ST6).

  In the above description, the vehicle information is information indicating whether the engine that drives the vehicle is operating, whether the vehicle is traveling, and whether the parking brake is on or off, and the vehicle internal information is a noise detection result in the vehicle interior. Although cases have been shown, the present invention is not limited thereto. That is, if it is information that can determine the occurrence of noise in the vehicle interior, for example, if the noise measured outside the vehicle exceeds a predetermined sound pressure level, it may be determined that the sound listening environment in the vehicle interior is not good. Good.

  As described above, according to the first embodiment, the forecheck execution unit 60 that sequentially selects a broadcast station different from the broadcast station that is receiving the broadcast and discriminates the receivable broadcast station, The listening environment determination unit 62 that determines whether or not the listening environment of the broadcast sound is good. When the listening environment determination unit 62 determines that the listening environment in the vehicle interior is not good, the forecheck execution unit 60 operates. And a control unit 65 for stopping the operation of the forecheck execution unit 60 when it is determined that the listening environment in the vehicle interior is good. With this configuration, it is possible to reduce the uncomfortable feeling caused by the forecheck in the broadcast audio being received.

  In addition, according to the first embodiment, the listening environment determination unit 62 determines the broadcast sound in the vehicle interior based on at least one of the vehicle information indicating the moving state of the vehicle and the vehicle internal information indicating the environmental state of the vehicle interior. Determine whether the listening environment is good. In this way, it is possible to accurately determine whether or not the listening environment for the broadcast sound in the vehicle interior is good from the measurement result of the moving state of the vehicle and the noise in the vehicle interior.

  Furthermore, according to the first embodiment, the vehicle information is information indicating whether the engine driving the vehicle is operating, whether the vehicle is traveling, and whether the parking brake is on or off. Therefore, it is possible to accurately determine whether or not the listening environment for the broadcast sound in the passenger compartment is good from the noise caused by the rotation of the engine and the road noise caused by the running of the vehicle.

  In the above description, the case where the moving body is a vehicle is shown. However, the broadcast receiving apparatus according to the present invention is a broadcast receiving apparatus for a moving body including a vehicle, a railroad, a ship, an aircraft, etc. This is a broadcast receiving apparatus suitable for carrying in or on-vehicle.

  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.

  DESCRIPTION OF SYMBOLS 1 Broadcast receiving device, 2 Antenna, 3 Radio tuner, 4 CD mechanism part, 5 USB memory, 6 DSP, 7 Sound output part, 8 Speaker, 60 Forecheck execution part, 61 External I / F part, 62 Listening environment determination part 63 Drive I / F unit, 64 Memory I / F unit, 65 Control unit.

Claims (3)

A broadcast receiving device that is mounted on a mobile body and receives a broadcast,
A forecheck execution unit that sequentially selects a broadcasting station different from a broadcasting station that is temporarily receiving a broadcast while receiving the broadcast, and determines a receivable broadcasting station;
A listening environment determination unit that determines whether or not the listening environment of the broadcast sound in the mobile body is good;
When the listening environment determination unit determines that the listening environment in the moving body is not good, the fore check execution unit is operated, and when it is determined that the listening environment in the moving body is good, the foreground is determined. A broadcast receiving apparatus comprising: a control unit that stops the operation of the check execution unit.   The listening environment determination unit has a good listening environment for the broadcast sound in the moving body based on at least one of moving body information indicating the moving state of the moving body and moving body internal information indicating the environmental state in the moving body. The broadcast receiving apparatus according to claim 1, wherein it is determined whether or not there is. The moving body information is information indicating any of operation of an engine that drives a vehicle that is the moving body, presence or absence of a traveling speed of the vehicle, and on / off of a parking brake,
The broadcast receiving apparatus according to claim 2, wherein the mobile body internal information is a noise detection result in a vehicle interior.

Images