JP-2026075453-A - FM radio receiving system
Abstract
[Problem] To provide an FM radio receiving system that allows the radio receiver to easily tune to a frequency that can be received at its current location, even if the radio receiver moves and the frequency at which it can receive FM broadcasts changes. [Solution] The FM system comprises a plurality of FM transmitters 2 that transmit audio information, a radio receiver 3 that receives the audio information from the FM transmitters 2, and a cloud server 4 that is connected to the FM transmitters 2 and the radio receiver 3 via an internet line 5 and has FM transmitter information including location information of the FM transmitters 2, reception area information and frequency information. The cloud server 4, upon receiving location information from the radio receiver 3 indicating the current location of the radio receiver 3, acquires the frequencies of the FM transmitters 2 that can be received by the radio receiver 3 at its current location based on the FM transmitter information, outputs them to the radio receiver 3 as the current frequency, and the radio receiver 3 sets the frequency of its tuner 36 to the current frequency. [Selection Diagram] Figure 1
Inventors
- 唐木 太一
Assignees
- 日本無線株式会社
Dates
- Publication Date
- 20260508
- Application Date
- 20241022
Claims (2)
- Multiple FM transmitters that transmit audio information, A radio receiver that receives the audio information from the FM transmitter, The system comprises a cloud server that is connected to the FM transmitter and the radio receiver via a network and has FM transmitter information including the location information, reception area information, and frequency information of the FM transmitter, When the cloud server receives location information indicating the current location of the radio receiver from the radio receiver, it obtains the frequency of the FM transmitter that the radio receiver can receive at the current location based on the FM transmitter information, and outputs it to the radio receiver as the current frequency. The radio receiver sets the tuner frequency to the current frequency. An FM radio receiving system characterized by the following.
- The cloud server further possesses map information, and when location information indicating the radio receiver's current location and destination information indicating the destination are input from the radio receiver, it predicts a travel route from the current location to the destination based on the map information, and based on the FM transmitter information, it obtains the frequency and location information of the FM transmitter that the radio receiver can receive along the travel route, outputs the frequency as the predicted frequency to the radio receiver, and outputs the location information as the predicted location information to the radio receiver. The radio receiver sets the frequency of the tuner to the predicted frequency at a timing calculated based on the predicted position information. The FM radio receiving system according to feature 1.
Description
This invention relates to a technique for receiving FM broadcasts with a mobile radio receiver. In response to the increasing number of disasters in recent years, a system called the "FM Disaster Prevention Information System" is being considered. This system is being deliberated by the "Working Group on Disaster Prevention Use of V-Low Bands" of the Study Subcommittee on the Utilization of Broadcast Frequencies, held by the Ministry of Internal Affairs and Communications. Specifically, its purpose is to provide the same audio information as that provided by the outdoor loudspeaker substations of the disaster prevention administrative radio system to vehicle evacuees and vehicles stranded due to heavy snow, etc., who may have difficulty hearing the audio information provided through these substations, by utilizing commercially available radio receivers (car radio receivers, etc.). "Regarding FM Disaster Prevention Information Systems," 1st edition, October 2021, Working Group on Disaster Prevention Use of V-Low Bandwidth, Ad Hoc Group This is a block diagram showing the schematic configuration of an FM radio receiving system according to Embodiment 1 of the present invention.This flowchart shows the procedure for FM radio reception processing in Embodiment 1 of this invention.This is a block diagram showing the schematic configuration of an FM radio receiving system according to Embodiment 2 of the present invention.This is a flowchart showing the procedure for FM radio reception processing in Embodiment 2 of this invention.This is an illustrative diagram showing how the FM radio receiving systems according to Embodiments 1 and 2 are applied to an FM disaster prevention information system. The present invention will be described below based on the illustrated embodiments. (Embodiment 1) Figure 1 is a block diagram illustrating the schematic configuration of an FM radio receiving system 1 according to Embodiment 1 of the present invention. The FM radio receiving system 1 comprises an FM transmitter 2, a radio receiver 3, and a cloud server 4. Here, the FM transmitter 2, the radio receiver 3, and the cloud server 4 are connected to each other via an internet line (network) 5. In this embodiment, the case in which the FM radio receiving system 1 of the present invention is applied to an FM disaster prevention information system will be explained as an example (see Figure 5). In the FM disaster prevention information system, as shown in Figure 5, base stations (master stations) are established in municipal offices and other locations. Within the base station's jurisdiction, multiple outdoor loudspeaker substations are distributed to provide voice information for disaster prevention radio broadcasts. The FM transmitter 2 is connected to these outdoor loudspeaker substations and is installed at predetermined intervals. The FM transmitter 2 is a device that transmits voice information for disaster prevention administrative radio using FM radio waves. Specifically, the loudspeaker substation receives the disaster prevention administrative radio waves from the base station, converts them into analog voice signals, and transmits them to the FM transmitter 2 via a wired connection. The FM transmitter 2 then modulates these analog voice signals using FM and outputs them from the antenna 21. The frequency used by FM transmitter 2 varies depending on the municipality (local government) where FM transmitter 2 is installed. In the example shown in Figure 5, FM transmitter 2 installed within the jurisdiction of local government X uses XMHz, while FM transmitter 2 installed within the jurisdiction of local government Y uses YMHz. The radio receiver 3 is a device that receives FM radio waves transmitted from the FM transmitter 2, demodulates and restores them, and provides voice information of the disaster prevention administrative radio system to users (evacuees). The radio receiver 3 is a portable device and, for example, is held or installed on a moving object (including a person). Specific examples include car radios mounted in vehicles, portable radios, mobile terminals with radio functionality, and mobile terminals with application software for listening to the radio installed. The radio receiver 3 comprises an antenna 31 for receiving radio waves from satellites (GPS satellites), an antenna 32 for receiving FM radio waves and transmitting/receiving data via the internet connection 5, a GPS (Global Positioning System) receiving unit 33, a communication unit 34, a control unit 35, a tuner 36, a frequency adjustment unit 37, and an interface unit 38. The GPS receiver 33 is a device that acquires location information indicating the current position of the radio receiver 3 from radio waves received from GPS satellites. This location information is expressed in terms of longitude and latitude. The GPS receiver 33 sends the acquired location information to the communication unit 34. The communication unit 34 is a communicatio