JP3317760B2 - Multiplex broadcasting receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplex broadcasting receiving apparatus for receiving not only normal broadcasting but also multiplexed data multiplexed with normal broadcasting.

[0002]

2. Description of the Related Art Conventionally, as a multiplex broadcast which is received by such a multiplex broadcast receiving device and multiplexes multiplex data into a normal broadcast, for example, a radio data system (hereinafter, referred to as "Europe") has been used. Broadcasting is simply known.

[0003] The RDS broadcast is a broadcast of a system in which multiplexed data which is information data for channel selection and the like is multiplexed on an FM radio broadcast signal.

There are various types of multiplexed data, such as a program identification code (hereinafter simply referred to as a PI code) composed of a country code and a program code, and the frequency of a broadcasting station where broadcasting is being performed. Data,
A station name display code (hereinafter, simply referred to as a PS code) for displaying the name of a broadcast station in characters, or an alternative station frequency list (hereinafter, simply referred to as an AF list) for notifying a frequency list of a broadcast station broadcasting the same program. ). In recent RDS broadcasting, the multiplexed data includes not only transmission station data relating to the broadcasting station that transmitted the multiplexed data, but also frequency data and station name display codes corresponding to each broadcasting station in the vicinity of the broadcasting station. Such multiplexed data including station data is considered as a service.

[0005] When receiving the FM multiplex broadcast obtained by multiplexing the multiplex data, the multiplex broadcast receiving apparatus receives the FM multiplex broadcast.
Not only transmission station data related to M multiplex broadcasting, but also other broadcasts other than the FM multiplex broadcasting being received, that is, frequency data and station name display codes related to other broadcasting including broadcasts not performing FM multiplex broadcasting, etc. Station data is also stored.

[0006] Next, when receiving a broadcast other than the FM multiplex broadcast, the multiplex broadcast receiving apparatus responds to the currently received broadcast from the frequency data in the multiplex data stored at the time of the previous FM multiplex broadcast reception. Search for the same frequency data as the frequency data to be performed, and if the same frequency data has been searched for, in the currently received broadcast based on the station name display code corresponding to the same frequency data in the multiplexed data. Display the station name.

Therefore, the user can immediately grasp the name of the broadcasting station currently receiving even if the currently receiving broadcasting station is not FM multiplex broadcasting.

The multiplex broadcast receiving apparatus has a preset function. When a preset is performed on a broadcast being received, frequency data corresponding to the broadcast is stored, and the user can perform a one-touch operation. Preset broadcasts can be called quickly.

[0009]

However, according to the above-mentioned conventional multiplex broadcast receiving apparatus, if the multiplexed data multiplexed by receiving the FM multiplex broadcast is not stored in advance, the FM multiplexing is performed by the preset function. Even if a broadcast other than the broadcast is received, the preset function cannot display the broadcast station name in the broadcast being received.

Further, when the previously received FM multiplex broadcast moves from the area for guiding the multiplex data to another area, the same frequency as that in the area for the previously received FM multiplex broadcast is guided. Therefore, even if FM multiplex broadcasting is received in advance and multiplexed data is stored, frequency data for the broadcast being received by the preset function is stored in the multiplexed data. When a broadcast station name is displayed based on a station name display code corresponding to the same frequency data by searching from the frequency data, there is a problem that an incorrect broadcast station name is displayed or a malfunction occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of receiving a broadcast other than a multiplex broadcast without first receiving a multiplex broadcast at the time of preset channel selection. Another object of the present invention is to provide a multiplex broadcast receiving apparatus capable of reliably preventing a broadcast station name corresponding to the broadcast being received from being erroneously displayed.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to transmission station data comprising frequency data and broadcast identification data of a multiplex broadcasting station, and in the same area as the multiplex broadcasting station and the multiplex broadcasting station. A data extracting means for receiving a multiplex broadcast obtained by multiplexing frequency data and station data composed of broadcast identification data in a non-multiplex broadcast station other than the station and extracting the transmission station data and the station data; Selecting means for selecting, a display means for displaying a broadcast station name for the receiving broadcast station at the time of receiving a desired broadcast station, station data of the broadcast station selected by the selecting means, and Storage means for storing transmission station data of a multiplex broadcasting station which has transmitted station data, and a transmission means corresponding to the station data when a non-multiplex broadcasting station of the station data stored in the storage means is received. When the transmission station data obtained from the broadcasting station received based on the station data matches the transmission station data corresponding to the station data, control is performed to display the name of the non-multiplex broadcasting station being received on the display means. Means.

[0013]

According to the multiplex broadcasting receiving apparatus of the present invention having such a configuration, unless the data stored in the storage means is erased even if the multiplex broadcasting is not received first at the time of channel selection, the multiplex data is transmitted first. The broadcast station name corresponding to the selected broadcast station can be displayed without receiving the broadcast station.

[0014] Further, even when a broadcast of the same frequency other than the multiplex broadcast station outside the area is received at the time of channel selection, erroneous display of the broadcast station name corresponding to the received broadcast station can be reliably prevented.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a multiplex broadcasting receiving apparatus according to the present invention applied to an RDS radio receiving apparatus; FIG. 1 is a block diagram schematically showing the RDS radio receiver. In addition, description of what is the same as that of the prior art will be omitted.

In FIG. 1, the RDS system radio receiving apparatus receives an FM broadcast arriving from a broadcasting station by a receiving antenna 11 and transmits a received audio signal, and extracts multiplexed data multiplexed on the FM broadcast. FM tuner 12, which is a data extracting means for performing the operation, an amplifier 13 for amplifying the received audio signal, a speaker 14 for outputting the received audio signal amplified by the amplifier 13, and a speaker 14 for extracting the received audio signal. A multiplex decoder 15 for decoding multiplexed data, a RAM 16 as storage means for storing the decoded multiplexed data, a display unit 17 as display means for displaying various information, and operation keys for performing various input operations For example, the operation unit 18 which is an operation means having a preset key
And a CPU 19 for controlling the entire radio receiving apparatus. The control means in claim 1 corresponds to the multiplex decoder 15 and the CPU 19.

Next, the preset operation in the RDS radio receiver will be described.

The radio receiver first receives an FM multiplex broadcast and stores multiplexed data multiplexed by the FM multiplex broadcast in the RAM 16. The PI code, the AF list, the station name display code, the following operation list, and the like in the multiplexed data are broadcast identification data.

Next, when a broadcast that is not FM multiplex broadcast is received, station data including a frequency data and a station name display code relating to the broadcast currently being received is read from the multiplex data stored in the RAM 16. .

Next, by inputting a preset key on the operation unit 18, the station data relating to the currently received broadcast is stored in a memory area of the RAM 16 corresponding to the preset key, ie, a preset memory. At this time, in addition to the station data stored in correspondence with the preset key, the preset memory stores, from the multiplexed data stored in the RAM 16, the transmission station data related to the FM multiplex broadcast to which the multiplexed data is provided. For example, a tracking operation list, frequency data, a station name display code, a PI code, and the like are also stored.

Next, the processing operation of the CPU 19 in the RDS radio receiver will be described with reference to FIG. FIG. 2 is a flowchart showing a processing operation of the CPU 19 when the RDS radio receiving apparatus receives a broadcast.

In FIG. 2, it is determined whether or not preset data including the station data and transmission station data corresponding to the broadcast being received is to be written into the preset memory (step S11). If the preset data is not to be written to the preset memory, it is determined whether a preset key has been pressed (step S12). If the preset key has not been pressed, it is determined whether the currently received broadcast is FM multiplex broadcast, that is, whether multiplex data is being received (step S13). If the multiplex data is being received, the multiplex data multiplexed to the FM multiplex broadcast is stored in the RAM 16 (step S14), and the process proceeds to step S11. If multiplex data is not being received in step S13, the process proceeds to step S11.

Next, if the preset data is to be written to the preset memory in step S11, it is determined whether or not the currently receiving broadcasting station to be preset is a multiplex data transmitting station transmitting FM multiplex broadcasting. A determination is made (step S15). If it is not a multiplex data transmission station, the R
It is determined whether or not multiplex data is stored in the AM 16 (step S16). If the multiplex data is stored in the RAM 16, the station data of the desired broadcasting station to be preset and the transmission station data relating to the multiplex data transmission station that provided the station data are set as the preset data in the RAM 16. (Step S17), and the operation process is terminated.

If the preset key has been pressed in step S12, it is determined whether station data of preset data corresponding to the pressed preset key is stored (step S18). If the station data is stored, it is determined whether or not the station data broadcast corresponding to the pressed preset key is an FM multiplex broadcast (step S19). If it is not FM multiplex broadcasting, a multiplex data transmission station which is a provider of the multiplex data is selected based on frequency data in the transmission station data in the preset data (step S20), and the selected multiplex data transmission station is selected. It is determined whether or not the electric field strength is good (step S21).

If it is determined that the electric field strength of the selected multiplex data transmission station is good, that is, if the current reception location is within the transmission area of the multiplex data transmission station, the transmission station data corresponding to the pressed preset key is depressed. Is stored in the preset memory (step S2).
2). The transmission station data of the preset data corresponding to the pressed preset key is compared with the transmission station data in the multiplex data transmitted from the currently received multiplex data transmission station (step S23). A broadcasting station, that is, a preset station is selected based on the station data of the corresponding preset data (step S2).
4) Compare and collate each PI code, each station name display code, and the like between the transmission station data in the preset data and the transmission station data from the multiplexed data transmission station that was previously being received, and determine whether they are the same. Is determined (step S25). If they are the same, the name of the currently receiving broadcast station is displayed based on the station name display code in the station data in the preset data corresponding to the pressed preset key (step S2).
5), end the operation processing.

If there is no station data of the preset data corresponding to the preset key in step S18, or if the broadcast received based on the frequency data in the station data is FM multiplex broadcasting in step S19, Or, if it is determined in step S21 that the electric field strength is bad, that is, it is out of the area, or if the transmission station data is not stored in the preset data of the preset memory in step S22, or if the transmission station data is not stored in step S25 Are not the same, the processing operation ends.

According to the radio receiving apparatus of the embodiment, the station data and the transmission station data which transmitted the station data are stored in the preset memory as the preset data at the time of the preset registration. When receiving a broadcast other than the above, the FM multiplex broadcast is received based on the transmission station data of the broadcast station received by the preset channel selection, and the transmission station data from the received FM multiplex broadcast and the preset channel selection are transmitted. If the transmission data of the selected preset data is the same as the transmission station data, the broadcast station name is displayed based on the station name display code in the station data in the preset data.

Therefore, even if the multiplex broadcast is not received first at the time of the preset channel selection, unless the memory power of the RAM 16 is turned off and the preset data is erased,
Thereafter, the broadcast station name corresponding to the preset selected broadcast station can be displayed without first receiving the multiplex data from the multiplex data transmission station.

Further, even when a broadcast of the same frequency other than a multiplex broadcast station outside the area is received during preset channel selection, erroneous display of the broadcast station name corresponding to the received broadcast station can be reliably prevented.

Although the above embodiment has been described by applying the present invention to a radio receiver compatible with RDS broadcasting, it goes without saying that the same effect can be obtained in other radio multiplex broadcasting.

[0031]

According to the multiplex broadcast receiving apparatus of the present invention configured as described above, unless the preset data is erased without first receiving the multiplex broadcast at the time of the preset channel selection, the multiplex data is thereafter transmitted. The broadcast station name corresponding to the preset selected broadcast station can be displayed without receiving it first.

Further, even if a broadcast of the same frequency other than the multiplex broadcast station outside the area is received at the time of preset channel selection, erroneous display of the broadcast station name corresponding to the received broadcast station can be reliably prevented.

[Brief description of the drawings]

FIG. 1 shows an RDS to which a receiving device for multiplex broadcasting according to the present invention is applied.
FIG. 2 is a block diagram illustrating an outline of a radio receiver of a system.

FIG. 2 is a flowchart illustrating a processing operation of a CPU when the RDS radio receiving apparatus receives a broadcast.

[Explanation of symbols]

 12 FM tuner (data extraction means) 15 Multiplex decoder (control means) 16 RAM (storage means) 17 display (display means) 18 operation unit (selection means) 19 CPU (control means)

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 1/06 H04B 1/16 H04H 1/00 H03J 5/00

Claims (1)

(57) [Claims] 1. A transmission station comprising frequency data and broadcast identification data of a multiplex broadcast station and frequency data and broadcast identification data of a non-multiplex broadcast station in the same area as the multiplex broadcast station and other than the multiplex broadcast station. Data extracting means for receiving the multiplexed broadcast obtained by multiplexing the station data and the transmitting station data and the station data; selecting means for selecting a desired broadcasting station; Display means for displaying a broadcast station name for the broadcast station, and storing station data of the broadcast station selected by the selection means and transmission station data of the multiplex broadcast station which transmitted the station data corresponding to the station data. A storage unit, which is obtained from a broadcast station that receives a non-multiplexed broadcast station of the station data stored in the storage unit based on transmission station data corresponding to the station data. Control means for displaying, on the display means, a broadcast station name of the non-multiplex broadcast station being received when the transmission data matches the transmission station data corresponding to the station data. Receiver.