JP2019121964A - Broadcast receiver for moving body - Google Patents

Abstract

To provide a broadcast receiver for a moving body, capable of switching a broadcast wave quickly.SOLUTION: A broadcast receiver 1 for a moving body, which is the broadcast receiver for the moving body mounted onto the moving body, comprises: a first broadcast wave processing part 10a generating a first reproduction signal by performing a reception processing of a first broadcast wave; a second broadcast processing section 10b generating a second reproduction signal by performing the reception processing of a second broadcast wave of a content similar to the first broadcast wave; a reception quality information acquisition part 22 referring reception quality information in regard to a better one of the reception quality from the reception quality of the first and second broadcast waves at the position with positional information, and acquiring the reception quality of the first and second broadcast waves corresponded to the positional information of the moving body; a selection part 11 selecting the reproduction signal according to the better one of the reception quality of the first and second broadcast waves; and a reproduction part reproducing a sound according to one reproduction signal selected by the selection section 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mobile broadcast receiver.

  2. Description of the Related Art Conventionally, there has been known a radio receiver performing a network follow operation to switch between multiple frequency channels broadcasting the same program content.

  For example, Patent Document 1 discloses a broadcast receiving apparatus including a foreground tuner unit, a background tuner unit, an alternative broadcast channel check unit, and a network follow execution unit. In the broadcast receiving apparatus, the alternative broadcast channel check unit uses the background tuner unit to check the reception quality of the alternative broadcast channel that is broadcasting the same content as the broadcast channel being received by the foreground tuner unit. Then, the network follow execution unit switches the broadcast channel received by the foreground tuner unit to the alternative broadcast channel whose reception quality checked by the alternative broadcast channel check unit is good at a predetermined trigger.

Unexamined-Japanese-Patent No. 2017-85198

  However, in the conventional configuration, after checking the reception quality of the alternative broadcast channel by the background tuner unit, the reception quality of the broadcast channel received by the foreground tuner unit is compared with the reception quality of the alternative channel. Perform network follow. Therefore, it is difficult to quickly switch the broadcast channel.

  Then, an object of this invention is to provide the broadcast receiver for mobiles which can switch a broadcast wave promptly.

  A mobile broadcast receiver according to an aspect of the present invention is a mobile broadcast receiver mounted on a mobile, which generates a first reproduction signal by performing a first broadcast wave reception process. A first broadcast wave processing unit, a second broadcast processing unit that generates a second reproduction signal by performing reception processing of a second broadcast wave having the same content as the first broadcast wave, position information, and the first at the position The reception quality of the first broadcast wave corresponding to the location information of the mobile unit and the second, referring to the reception quality information in which the reception quality of the broadcast wave and the reception quality of the second broadcast wave are associated in advance with the better one. A reception quality information acquisition unit for acquiring the reception quality of the broadcast wave, a selection unit for selecting a reproduction signal according to one of the reception quality of the first broadcast wave and the reception quality of the second broadcast wave and having a better reception quality; To play back the audio related to the one playback signal selected by the unit And, equipped with a.

  According to this aspect, the broadcast wave can be switched quickly.

  According to the present invention, it is possible to provide a mobile broadcast receiver capable of rapidly switching broadcast waves.

FIG. 1 is a schematic configuration diagram of a mobile-use broadcast receiving apparatus 1. It is a figure which shows an example of reception quality information. It is a figure for demonstrating the operation | movement flow by the broadcast receiver 1 for mobile bodies.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. (In addition, in each figure, what attached the same code | symbol has the same or same structure.)

(1) Configuration of Mobile Broadcast Receiver 1 FIG. 1 is a schematic block diagram of a mobile broadcast receiver 1 according to the first embodiment of the present invention. The mobile broadcast receiver 1 includes antennas 2a, 2b, 2c and 2d, an AM radio broadcast processing unit 10a, an FM radio broadcast processing unit 10b, a selection unit 11, an audio processing unit 12, and a speaker 13. A data communication module (DCM) 14, a storage unit 15, a display unit 16, an operation unit 17, a position information acquisition unit 18, and a control unit 19. The mobile broadcast receiver 1 is a broadcast receiver that can be provided to a mobile. Here, the moving body refers to any arbitrary moving body such as, for example, a vehicle, a motorcycle, or a bicycle.

  The AM radio broadcast processing unit 10a is an example of a first broadcast processing unit. The AM radio broadcast processing unit 10a receives an AM radio broadcast signal of a predetermined frequency channel according to a command from the control unit 19 through the antenna 2a, performs predetermined processing, and displays a reproduction screen related to the AM radio broadcast. Are generated and output to the selection unit 11. The AM radio broadcast processing unit 10a includes, for example, a detection unit and a demodulation unit (not shown). The detection unit receives the signal input from the antenna 2a, performs detection processing on the signal to generate a detection signal, and outputs the detection signal to the demodulation unit. The demodulation unit receives the detection signal input from the detection unit, performs demodulation processing on the detection signal, and outputs the generated reproduction signal to the selection unit 11. Further, the AM radio broadcast processing unit 10a outputs information related to the reception quality such as the electric field strength and the SN ratio of the AM radio broadcast wave to be received to the control unit 19 as reception quality information.

  The FM radio broadcast processing unit 10 b is another example of the second broadcast processing unit. The FM radio broadcast processing unit 10b receives an FM radio broadcast signal of a predetermined frequency channel according to a command from the restriction unit 19 through the antenna 2b, performs predetermined processing, and reproduces the FM radio broadcast. A signal is generated and output to the selection unit 11. The FM radio broadcast processing unit 10 b includes, for example, a detection unit and a demodulation unit (not shown). The detection unit receives the signal input from the antenna 2b, performs detection processing on the signal to generate a detection signal, and outputs the detection signal to the demodulation unit. The demodulation unit receives the detection signal input from the detection unit, performs demodulation processing on the detection signal, and outputs the generated reproduction signal to the selection unit 11. Further, the FM radio broadcast processing unit 10 b outputs information related to the reception quality such as the electric field strength and the SN ratio of the FM radio broadcast wave to be received to the control unit 19 as reception quality information.

  Here, generally, so-called simulcast is performed in which radio programs of the same contents are provided by AM radio broadcast waves and FM radio broadcast waves. In the present embodiment, broadcast waves for performing broadcast (simul broadcast) of the same content in this manner are referred to as a first broadcast wave and a second broadcast wave. The first broadcast wave and the second broadcast wave may each be either an AM radio broadcast wave or an FM radio broadcast wave.

  The selection unit 11 includes, for example, a frame memory (not shown), a digital-analog converter, a comparator, a DSP (Digital Signal Processor), and the like. The selection unit 11 receives the reproduction signal (AM radio reproduction signal) output from the AM radio broadcast processing unit 10 a and the reproduction signal (FM radio reproduction signal) output from the FM radio broadcast processing unit 10 b. Then, based on an instruction from the control unit 19, the selection unit 11 outputs, to the audio processing unit 12, a signal with better reception quality among the AM radio reproduction signal and the FM radio reproduction signal.

  The audio processing unit 12 includes, for example, a digital-analog conversion unit (not shown) and a power amplification unit. The audio processing unit 12 generates an audio signal based on the signal input by the selection unit 11, amplifies the audio signal, and outputs the amplified audio signal to the speaker 13. The speaker 13 generates voice based on the voice signal input by the audio processing unit 12.

  The DCM 14 is a communication device that is connected to the antenna 2 c and that exchanges data with an information center that provides various types of information related to radio broadcasting via a wireless communication network such as the Internet. The information center (external device) has a function of collecting data on reception quality information measured and learned by each device from each vehicle via a wireless communication network and merging them. This information is, for example, in the form of a map represented by areas (surfaces) as a set of positions, and indicates which area the reception quality of the AM broadcast wave or the FM broadcast wave is better in which area. In addition, the integration (merging) referred to here may be, for example, averaging processing for each position, or weighting with a learning degree for each position, or averaging processing for each position, or a learning degree for each position It may be so-called "good game" processing to collect only the highest information. Also, the learning degree referred to here is, for example, the cumulative number of times of learning and / or the elapsed time from the last update date, etc., and is a parameter indicating how much the learning information is actually confirmed by measurement.

  The storage unit 15 includes, for example, a magnetic tape device, a magnetic disk device, an optical disk device, and the like. The storage unit 15 stores an operating system program, a driver program, an application program, data, and the like used for processing in the control unit 19. The storage unit 15 may store reception quality information, which is information indicating modulation schemes with good reception quality at each position, for example, as shown in FIG. In FIG. 2, information of modulation schemes with good reception quality is superimposed and displayed on a map of a predetermined area. For example, the part displayed as "AM" indicates that the reception quality of AM radio broadcast is good at the position corresponding to the part as a result of learning based on the past measurement results. Further, for example, the portion displayed as “FM” indicates that the reception quality of the FM radio broadcast is good at the position corresponding to the portion as a result of learning based on the past measurement results. When a new measurement result is obtained for a certain position, the already stored information is updated based on the measurement results up to that point and the new measurement result. The reception quality information may not be stored in the storage unit 15. The reception quality information may be stored, for example, in an information center or the like, and the mobile broadcast receiver 1 may acquire the reception quality information from the information center or the like via the communication network.

  The display unit 16 is formed of, for example, an LCD (Liquid Crystal Display) of the mobile broadcast receiver 1, and displays various screens under the control of the control unit 19.

  The operation unit 17 is provided on, for example, the front surface of the mobile broadcast reception device 1, and includes various buttons, direction keys, numeric keys, hardware such as a touch panel disposed on the display unit 16, or the display unit 16. The software keyboard having the functions of the button, the direction key, the ten key and the like is configured by software virtually displayed. In addition, the operation unit 17 may be configured as a reception unit capable of receiving an operation signal including an operation content from a remote controller terminal different from the mobile broadcast reception device 1.

  The control unit 19 is configured by a CPU (Central Processing Unit) or the like built in the mobile broadcast receiver 1. The control unit 19 centrally controls the operation of each unit of the mobile broadcast receiver 1 according to the program stored in the storage unit 15. The control unit 19 refers to the reception quality information stored in the storage unit 15 and estimates which of the AM broadcast wave and the FM broadcast wave has the better reception quality in the position information acquired by the position information acquisition unit 18 And outputs a command to the selection unit 11 to select a reproduction signal corresponding to the estimated broadcast wave. That is, the control unit 19 controls the frequency and band of the broadcast processing unit (the AM radio broadcast processing unit 10a and the FM radio broadcast processing unit 10b).

  The position information acquisition unit 18 includes a GPS receiver and / or a gyro, and acquires position information of the vehicle from the navigation system on the communication network via the antenna 2d. The position information may include road information for identifying a road.

(2) Operation of Mobile Reception Device 1 Next, the operation of the mobile reception device 1 will be described with reference to FIG. This operation flow is mainly performed by the control unit 19 in cooperation with each element of the mobile-body broadcast receiving apparatus 1 based on a program stored in advance in the storage unit 15.

(Step S101)
First, when the user performs a so-called preset operation for designating viewing of a radio program broadcast by a specific broadcast station by operating the operation unit 17, the control unit 19 receives the preset operation. More specifically, the user inputs, as a preset operation, the type of radio broadcast (AM radio broadcast or FM radio broadcast), the frequency channel of a desired broadcast station, and the like.

(Step S102)
Next, the control unit 19 controls the AM radio broadcast processing unit 10a or the FM radio broadcast processing unit 10b according to the radio broadcast selected by the user related to the above-mentioned preset operation, thereby the broadcast station selected by the user. The reception process is performed on the frequency channel to generate a reproduction signal. Further, the control unit 19 outputs, to the selection unit 11, an instruction to output one of the AM radio reproduction signal and the FM radio reproduction signal to the audio processing unit 12 according to the radio broadcast selected by the user.

(Step S103)
Next, the position information acquisition unit 18 acquires position information and road information.

(Step S104)
Next, the control unit 19 determines whether the vehicle has moved based on the position information. If it is determined that the vehicle has not moved (step S103; No), the process returns to step S103.

(Step S105)
When it is determined that the vehicle has moved (step S103; Yes), the control unit 19 refers to the reception quality information stored in the storage unit 15, and acquires the type of modulation scheme in the position information acquired in step S102. . The control unit 19 may acquire reception quality information from an information center or the like via a communication network, and may refer to the reception quality information to acquire the type of modulation scheme in the position information acquired in step S102.

(Step S106)
Next, the control unit 19 determines whether or not the type of the current modulation scheme selected by the selection unit 11 is the same as the type of the modulation scheme acquired in step S105. If it is determined that the current type of modulation scheme is the same as the acquired type of modulation scheme (step S105; Yes), the process proceeds to step S107.

(Step S107)
When it is determined that the type of the current modulation scheme and the type of the acquired modulation scheme are not the same (Step S105; No), the control unit 19 instructs the selection unit 11 to reproduce the signal according to the acquired type of the modulation scheme. Output a command to select. This is the end of the operation flow.

  In the present embodiment, the mobile unit broadcast receiving apparatus 1 is a mobile unit broadcast receiving apparatus mounted on a mobile unit, and generates a first reproduction signal by performing reception processing of a first broadcast wave. The broadcast wave processing unit 10a, a second broadcast processing unit 10b that generates a second reproduction signal by performing reception processing of a second broadcast wave having the same content as the first broadcast wave, position information, and a second at the position The reception quality of the first broadcast wave and the first broadcast wave corresponding to the acquired position information are referenced with reference to the reception quality information in which the reception quality of the first broadcast wave and the reception quality of the second broadcast wave are associated in advance. (2) A reception quality information acquiring unit 22 for acquiring the reception quality of the broadcast wave, and a selection unit 11 for selecting a reproduction signal relating to the better one of the reception quality of the first broadcast wave and the reception quality of the second broadcast wave. And one reproduction signal selected by the selection unit 11 And a reproduction section for reproducing audio according. With this configuration, without detecting the reception quality of the broadcast wave on which simulcasting is performed, the reception position of the current position or the movement destination is estimated from the actual measurement value of the reception quality in the past, and the frequency or band to be received is Can be controlled. Therefore, it becomes possible to switch broadcast waves promptly.

  The embodiments described above are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. The elements included in the embodiment and the arrangement, the material, the conditions, the shape, the size, and the like of the elements are not limited to those illustrated, and can be changed as appropriate. In addition, configurations shown in different embodiments can be partially substituted or combined with each other.

  DESCRIPTION OF SYMBOLS 1 ... Broadcast reception apparatus for mobiles, 2a, 2b, 2c, 2d ... Antenna, 10a ... AM radio broadcast processing part, 10b ... FM radio broadcast processing part, 11 ... Selection part, 12 ... Audio processing part, 13 ... Speaker, 14 ... DCM, 15 ... storage unit, 16 ... display unit, 17 ... operation unit, 18 ... position information acquisition unit, 19 ... control unit

Claims (1)

A mobile broadcast receiver mounted on a mobile, comprising:
A first broadcast wave processing unit that generates a first reproduction signal by performing reception processing of the first broadcast wave;
A second broadcast processing unit that generates a second reproduction signal by performing reception processing of a second broadcast wave having the same content as the first broadcast wave;
Reference is made to reception quality information in which position information and the reception quality of the first broadcast wave at the position and the reception quality of the second broadcast wave among the reception quality of the second broadcast wave are associated with each other in advance. A reception quality information acquisition unit for acquiring the reception quality of the corresponding first broadcast wave and the reception quality of the second broadcast wave;
A selection unit for selecting a reproduction signal relating to one of the reception quality of the first broadcast wave and the reception quality of the second broadcast wave that is better in reception quality
A reproduction unit that reproduces an audio related to the one reproduction signal selected by the selection unit;
A mobile broadcast receiver comprising: