JPH01130633A - Receiver - Google Patents

Abstract

PURPOSE:To restore a station to a just preceding broadcast station instantly when any defect takes place in a reception station once decided by preserving broadcast frequency information or the like as to the just preceding reception station. CONSTITUTION:A corresponding frequency signal of a demodulation radio data fed to an input section 7 of a microcomputer 6 is stored in a memory register 10. A frequency of a broadcast station during the test of reception station is stored in the memory register 10 in addition to the frequency of the broadcast station during reception at present. Then the content of the register 10 is given to a signal reception section 2 via an output section 11 based on a command from a CPU 8 to select whether the reception of a broadcast radio wave from the broadcast station received precedingly is continued or a radio wave from a new broadcast station is to be received. Since the desired information is preserved as to the just preceding reception station in this way, if any defect takes place in the reception station decided once, the just preceding reception station is instantly restored.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a receiver for a vehicle, and in particular,
The present invention relates to a vehicle receiver that can automatically perform channel selection while sequentially tracking broadcast stations broadcasting the same content.

[Prior Art] For example, in European regions, road networks for vehicles such as automobiles are well-developed, and many FM broadcast stations with relatively small service areas are connected to the road networks for vehicles. It is laid out along the line. Then, among these broadcasting stations, the broadcasting frequencies from the broadcasting stations that are broadcasting the same program are listed up, and a receiver installed in a vehicle traveling along a certain predetermined road receives the broadcast frequencies. It is possible to receive broadcasts of the same program continuously by selecting stations with good reception according to the above list, and it is also possible to receive broadcasts of the same program in succession according to the above-mentioned list. Radio Data System (R
DS), various data (hereinafter referred to as radio data) are multiplexed into the original FM broadcast,
Efforts are being made to use this radio data to automatically select the best receivable station of the same program, display the name of the corresponding broadcasting station, or transmit various traffic information.

FIG. 3 is a general explanatory diagram of a channel selection operation that is automatically performed by a radio receiver mounted on a vehicle while sequentially tracking broadcast stations broadcasting the same program. In Fig. 3, a vehicle equipped with a radio receiver is traveling from a certain point A to another point B, and four broadcasting stations P, Q, R, and S are being broadcast during this time. It is assumed that the Here, the Δ marks schematically represent the antennas of each broadcasting station. Currently, broadcasting stations P, Q, R,
It is assumed that different broadcasting frequencies are assigned to S, and the broadcast programs are all the same. Assume that the vehicle currently running is in an area where it is affected by electric fields from both broadcast stations P and Q. At this time, the broadcasting station P or Q with the higher electric field strength will be selected. The same applies to other cases, and the same program can be continuously listened to with good reception conditions.

By the way, some receivers for receiving such radio broadcasts are equipped with an electronic memory, and for each of a plurality of tuning keys, one
A device is known in which tuning data for only individual stations is stored. When such a receiver is used in a fixed area, by storing stations with good reception in the area for the tuning key, it is possible to find stations with good reception with just one tuning operation. You can select the station.

However, when this receiver is mounted on a vehicle and used while moving, the vehicle may move out of the memorized service area and the reception condition may deteriorate significantly. This means that local operations will have to be carried out. As the range of movement of the vehicle increases, this channel selection operation must be performed many times, making it extremely troublesome to handle. Furthermore, once a certain broadcasting station is determined as a receiving station, the contents of the memory are cleared, and therefore even if the determination is inconvenient, the broadcasting station that was received immediately before is cleared. You will no longer be able to select the same broadcasting station as a receiving station again.

In addition, in this type of vehicle-mounted receiver, even after some receiving stations have been switched, the reception condition may deteriorate immediately due to multipath interference. , if all the previous information, including the necessary information such as the broadcast frequency of the previous receiving station, has been cleared from memory, a new A
It becomes impossible to import the F code and select a station with even a slightly good reception condition.

[Problems to be Solved by the Invention] Conventional receivers are configured to include the electronic memory as described above, and for each of a plurality of tuning keys, only one key for the same band can be set. Since this device is designed to store tuning data only for the following stations, when it is mounted on a vehicle and used while moving, the vehicle may move out of the service area where it was stored and the reception condition may become extremely poor. In this case, the tuning operation may have to be performed again, and if the range of movement of the vehicle becomes large, this tuning operation may have to be performed many times.
In addition, once the receiving station is determined, the contents of the memory are cleared, making it difficult to return to the previous broadcasting station even if there is something inconvenient about the decision. There was one problem.

This invention was made in order to solve the above-mentioned problems, and even after the receiving station is once determined by automatic tuning operation, the broadcast frequency information etc. of the immediately preceding receiving station is saved. An object of the present invention is to obtain a receiver that can immediately return to the immediately preceding broadcasting station when a problem occurs with the previously determined receiving station.

[Means for Solving the Problems] A receiver according to the present invention includes a signal receiving section that receives and detects a broadcast that includes multiplexed required data, and a signal receiving section that receives and detects broadcast content from the signal receiving section. an audio amplification section that amplifies and operates a speaker; a radio data demodulation section that demodulates the radio data from the signal amplification section; and a radio data demodulation section that receives the signal from the radio data demodulation section and converts the signal as a result of necessary processing to the The microcomputer includes an input section that receives the signal from the radio data demodulation section, and a microcomputer that performs necessary processing on the input signal.
a memory register for exchanging required data between the CPU and the CPU; an address register for specifying a specific address of the memory register; and an address register for specifying a specific address of the memory register;
It includes an output section that outputs a signal as a result of processing by U.

[Operations] In this invention, when a new receiving station is determined as a result of an automatic channel selection operation, at least information regarding the corresponding frequency of the receiving station that was received immediately before is left in the memory register. It will be done like this.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
FIG. 1 is a block diagram showing the overall configuration of a receiver that is an embodiment of the present invention. In FIG. 1, broadcast radio waves from a certain predetermined broadcasting station are received by an antenna (1) and applied to a signal receiving section (2). This signal receiving section (
2) includes a high frequency receiving section, a detection section, etc.
The content being broadcast from the broadcast station is transmitted through the audio amplification section (3).
), the signal is appropriately amplified and then added to the speaker (4), where it is broadcast at the desired volume. Furthermore, the radio data contained in the broadcast radio waves as a type of control information is demodulated by a radio data demodulation section (5) and then applied to an input section (7) of a microcomputer (6). . This microcomputer (6) includes, in addition to the input section (7), a CPU (8) and an address register (9).
), a memory register (10) and an output section (11). Now, the radio data which is demodulated and applied to the input section (7) is stored as a corresponding frequency signal in the memory register (10) under the control of the CPU (8). This memory register (lO) stores not only the frequency of the broadcasting station currently being received, but also the frequency of the broadcasting station whose reception status is being tested. Then, when a certain predetermined condition is satisfied, the contents of the memory register (10) specified by the address register (9) are transferred to the signal received via the output section (11) based on a command from the CPU (8). (2), and a selection is made as to whether to accept broadcast waves from a new broadcast station or to continue accepting broadcast waves from a broadcast station that has been previously received.

FIG. 2 is a flowchart for explaining the operation of the embodiment shown in FIG. 1 above.

Next, the operation of the above embodiment will be explained with reference to FIG. Assume that a vehicle C equipped with the target receiver is currently traveling on the course shown in FIG. 3 from a starting point A to an ending point B, and is currently receiving broadcast station P. . At some point, the receiver mounted on vehicle C receives rAF
The system enters the "search start" state and captures the rAF code multiplexed with any broadcast. here,
The AP code indicates a frequency list of a group of broadcasting stations composing the same network, and its leading data represents various characteristics of the network to which it belongs. Next, a determination is made as to whether the captured AF code is "leading data" or not. If the result of this determination is affirmative, it is determined whether the leading data stored in the memory is the same as the received leading data.

If the result of this determination is negative, only the contents of the final stage in the memory are left and all other data is cleared. Then, the newly captured AF code is designated as the first data. Next, a test is performed to see whether the broadcasting station (AF station) designated as the current target station satisfies various reception conditions. That is, A
Checking the reception level of F station, checking the audio signal level, comparing the level of the current receiving station with the level of the AF station after a certain predetermined time, and receiving the PI code within a certain predetermined time. Noigan, the PI code of the current receiving station is A
Various tests are performed, such as whether it is equal to the PI code of station F or not. Here, the PI code is a code unique to each broadcasting network, and includes a country code, a service area code, and the like. Further, the same-PI code stations are the same network stations, and their broadcast contents are also the same. As a result of this test, if it is determined that it is not suitable to shift to the AF station, reception at the current receiving station is resumed. On the other hand, when it is determined that it is preferable to shift to an AF station, the frequency information of the current receiving station is stored in the final stage of memory, all other AF codes are cleared, and the new AF station is You will receive broadcasts from.

[Effects of the Invention] As explained above, the receiver according to the present invention includes a signal receiving unit that receives and detects broadcasting that includes multiplexed required data, and a signal receiving unit that receives and detects broadcasting that includes multiplexed required data, and a signal receiving unit that receives and detects broadcasting content from the signal receiving unit. a radio data demodulation unit that demodulates the radio data from the signal reception unit; a radio data demodulation unit that receives the signal from the radio data demodulation unit and outputs the signal as a result of necessary processing; The microcomputer includes an input section that receives the signal from the radio data demodulation section, and a CPU that performs necessary processing on the input signal. and a memory register for exchanging necessary data with the CPU;
Since it includes an address register that specifies a specific address of the memory register and an output section that outputs a signal as a result of processing by the CPU, new channels are generated as a result of the automatic channel selection operation. When a suitable receiving station is determined, at least information regarding the corresponding frequency of the receiving station that was received immediately before can be left in the memory register, so that the receiving station is once determined by automatic tuning operation. Since the necessary information about the previous receiving station is saved even after the receiving station is received,
When a problem occurs with the previously determined receiving station, it is possible to immediately return to the previous broadcasting station. As mentioned above, in this type of vehicle-mounted receiver, even after some receiving stations have been switched, the reception condition may deteriorate immediately due to multipath interference. In such a case, if all the previous information including the necessary information such as the broadcast frequency of the previous receiving station has been cleared from memory, it is possible to use a new AF code even though the reception condition is poor. However, by retaining the necessary information of the previous receiving station as in this invention,
Since it is possible to compare the reception status between the current reception station and the previous reception station, it is possible to select a station with even a slightly better reception status. This has the effect that it also becomes possible to import the AF code.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a receiver that is an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the above embodiment, and FIG. 3 is a vehicle-mounted receiver. FIG. 2 is a general explanatory diagram of an automatic channel selection operation. (1) is an antenna, (2) is a signal receiving section, (3) is an audio amplification section, (4) is a speaker, (5) is a radio data demodulation section, (6) is a microcomputer, and (7) is an input section. ,
(8) is the CPU, (9) is the address register, (to
)' is a memory register, and (11) is an output section. Agent Touteru Soga! ``□ 'i Hi-Ko-1 Figure 1 10: J-Mori register Figure 2 Figure 3 P, Q, R, S: Family history A: Origination, B: End of life C: Vehicle −

Claims (1)

[Claims] (1) A signal receiving section that receives and detects broadcasting that includes multiplexed required data; an audio amplifying section that amplifies the broadcast content from the signal receiving section and operates a speaker; and the signal receiving section. A receiver comprising: a radio data demodulator that demodulates radio data from the radio data demodulator; and a microcomputer that receives a signal from the radio data demodulator and provides a signal as a result of necessary processing to the signal receiver. , the microcomputer includes: an input unit that receives a signal from the radio data demodulation unit; a CPU that performs necessary processing on the input signal; and a memory that exchanges required data with the CPU.・A register, an address register that specifies a specific address of the memory register, and an output section that outputs a signal as a result of processing by the CPU, and a new channel is generated as a result of the automatic channel selection operation. 1. A receiver according to claim 1, wherein when a receiving station is determined, at least corresponding frequency information of the receiving station that was received immediately before is left in the memory register.