JP2002359568A - Rds receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a reception station needed to be re-changed by the operation of a user again since a station is not necessarily the station desired by the user, even if switching is made automatically to a next station with improved reception state, when search is made under the conditions where a PTY code is the same as in a conventional RDS receiver. SOLUTION: In the RDS receiver for automatically tuning stations, based on codes included in reception data by receiving RDS broadcasting, a station that can be received and has the same PTY code is searched for according to the deterioration of the reception state, and the searched station is temporarily disclosed to the user, thus enabling the user oneself to select a desired station arbitrarily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RDS (Radio
Data System) related to an RDS receiver.

[0002]

2. Description of the Related Art In Europe, where the FM broadcast service with a relatively narrow service area is the main body of the radio broadcast service and the broadcast reception ratio on the car radio is high, there is a strong demand for an advanced channel selection function. , RDS broadcasting is in practical use. The RDS broadcast is a system in which various digital data (data that can be used for automatic selection of the best receiving station, traffic information identification, display of the broadcast station name, etc.) are multiplexed and transmitted to the FM radio broadcast. Is PI (Program I
(dentification) code, PTY (Program Type) code, and the like. The PI code is a code unique to each broadcast network, and the same code has the same broadcast content. The PTY code is a code for identifying a genre of a broadcast program, and includes news, sports,
It is attached according to genres such as classical music and jazz.

A conventional RDS receiver has a function of performing automatic channel selection by using PI and PTY codes.
As shown in Japanese Patent Publication No. 229, when the same PI station cannot be received, an automatic tuning operation based on the PTY code (PTY search) is performed, and when a station having the same PTY code is found, the station is automatically switched to that station. It has been replaced.

[0004]

SUMMARY OF THE INVENTION However, PTY
If you search only on the condition that the code is the same, there are many stations with completely different broadcast contents, so even if you automatically switch to the next station with good reception status, it is not necessarily the station you want. Is not limited. Therefore, in this case, the receiving station must be changed again by the operation of the user, and there is a problem in that the receiving station is rather troublesome.

The present invention has been made in view of the above-mentioned problems, and
It is an object of the present invention to enable a user to arbitrarily switch and set a desired station from among group stations having the same PTY code when the reception state deteriorates for some reason during DS broadcast reception.

[0006]

SUMMARY OF THE INVENTION The present invention provides an RDS receiver that receives an RDS broadcast and performs an automatic channel selection operation based on a code included in received data. A receivable station having a PTY code is searched, and the searched station is presented to the user for a certain period of time.

Further, the present invention provides an RDS receiver which receives an RDS broadcast and performs an automatic channel selection operation based on a code included in received data. Search and store possible stations and present them in response to user commands.

Further, the present invention presents the same receivable PTY station to the user when the reception condition deteriorates during the reception of the PI station and there is no more PI station to be switched to next.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a block circuit diagram of an RDS receiver according to the present invention, wherein 1 is an antenna, 2 is an FM tuner circuit for outputting an FM demodulated signal, and a local oscillation circuit is constituted by a PLL synthesizer. Reference numeral 3 denotes an MPX circuit that separates the output signal of the FM tuner circuit 1 into R and L signals, 4 denotes an amplifier that amplifies the output signal of the MPX circuit, 5 denotes a speaker, and 6 denotes an RDS extracted from the FM demodulated output of the FM tuner circuit 1. An RDS decoder that demodulates the modulated signal, reproduces a clock, and performs group synchronization and error correction of the demodulated RDS data. 7 is a display such as a liquid crystal type, and 8 is a preset key P
1 to P6, a key circuit including a set key SET and a PTY key PTY, 9 is a memory, 10 is a microprocessor, and each circuit is controlled by a program written in advance. The display 7, the preset keys P1 to P6, the set key SET, and the PTY key PTY are arranged as shown in FIG.

Next, the operation will be described with reference to the flowchart of FIG. While a certain PTY station is being received, it is determined in step S1 whether the reception state has deteriorated beyond a prescribed level. If it is determined that the reception state has deteriorated, the same PTY search is performed in step S2 to search for the next switching station. Search for PTY stations. When a station having a predetermined electric field level or higher is found from a signal from a signal meter in the FM tuner circuit 1, the PTY is detected in step S3.
The code is checked, and if the codes match, the station is received for a certain period of time and presented to the user by the speaker 5 or the display 7. If a confirmation command is sent from the user by means of operation of the set key SET or the like during reception, it is confirmed in step S4, and the station is steadily received in step S5.

If a confirmation command is not obtained from the user, the PTY search for the next station is performed after a predetermined time, and the same operation is performed. Even if the search makes one round of the reception frequency band, if there is no decision operation from the user and the search level is divided, the set second search is performed, and at the time of the second search, It is also possible to skip stations that have been received once in the first lap.

Second Embodiment In the first embodiment, an example is shown in which the searched PTY station is presented for a certain period of time, and if the user performs a decision operation, the station is steadily received.
As shown in (1), it is also possible to temporarily store the station searched by the PTY in the memory 9, call the stored station in response to a call command by the user's operation, and regularly receive.

That is, while a certain PTY station is being received, it is determined in step S11 whether the reception state has deteriorated beyond a prescribed level. If it is determined that the reception state has deteriorated, a normal switching station is searched for in step S12 in order to search for the next switching station. PTY
A station having the same PTY code is searched by a search. If the searched stations are stations having a specified electric field level or higher, those stations are stored in the memory 9 in S13. Thereafter, when a call command is issued by operating the set key SET or the like by the user in S14, the PTY station stored in the memory 9 is presented to the user by the speaker 5 or the display 7 in S15, and the station is regularly received. I do. If the call command is not obtained from the user, the station that has been receiving the message is continuously received.

When a new station is selected from the stored station, all stations can be called by a calling means and the station can be selected. It is also possible for the user to select a new station.

Embodiment 3 In Embodiments 1 and 2, the description has been made mainly on the selection of the same PTY station.
When the reception condition deteriorates while receiving a station, there is no next switching PI station (broadcasting station with the same content), and when there is no switching station, present the same receivable PTY station stored in the memory to the user. Is also possible.

[0016]

As described above, the present invention provides an RDS receiver which receives an RDS broadcast and performs an automatic channel selection operation based on a code included in the received data. A search is made for a receivable station having the same PTY code, and the searched station is presented to the user for a certain period of time.
After checking the presented station, the user can easily select a desired station.

Further, the present invention provides an RDS receiver which receives an RDS broadcast and performs an automatic tuning operation based on a code included in received data. Possible stations are searched and stored, and presented in response to a command from the user. Therefore, if the reception condition deteriorates, a desired station can be easily selected as necessary.

Further, according to the present invention, when the reception condition deteriorates during reception of a PI station and there is no more PI station to be switched to next, the same receivable PTY station is presented to the user. When the reception condition of the station deteriorates, a desired PTY station can be easily selected in place of the PI station.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing an embodiment of the present invention.

FIG. 2 is a front view of an RDS receiver showing an embodiment of the present invention.

FIG. 3 is a control flowchart for explaining the first embodiment of the present invention.

FIG. 4 is a control flowchart for explaining a second embodiment of the present invention.

[Explanation of symbols]

1: Antenna 2: FM tuner circuit 3: MPX
Circuit 4: Amplifier 5: Speaker 6: RDS decoder 7: Display
8: Key circuit 9: Memory 10: Microprocessor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5J103 AA13 CB04 FA03 GA07 GA11 JA11 5K061 AA09 BB04 BB17 FF12 FF16 JJ06 JJ07

Claims (3)

[Claims] An RD configured to receive an RDS broadcast and perform an automatic tuning operation based on a code included in received data.
In the S receiver, the same PT
RD for searching for a receivable station having a Y code and presenting the searched station to a user for a certain period of time
S receiver. 2. An RD for receiving an RDS broadcast and performing an automatic tuning operation based on a code included in the received data.
In the S receiver, the same PT
An RDS receiver which searches for and stores a receivable station having a Y code and presents it in response to a command from a user. 3. The same PTY station that can be received is presented to a user when the reception state deteriorates during reception of a PI station and there is no next PI station to be switched. RDS receiver.