JPH0221731A - Radio receiver - Google Patents

Abstract

PURPOSE:To set a volume level automatically and to evade troublesome operation by storing an equalizer characteristic or a volume level in response to a program content identification code, and setting a prescribed equalizer characteristic or volume level based on the program content identification code included in a transmission data. CONSTITUTION:The equalizer characteristic or the volume level in response to an automatic equalizing key(PTY) signal being a program content identification code is stored in a memory 22 corresponding to the PTY. With an automatic equalizing key 40 depressed, a control section 21 controls an equalizer 5 and an electronic volume 6 so as to attain the equalizer characteristic or the volume level stored in the memory 22 corresponding to the PTY based on a PTY signal included in a data sent from a reception station. Thus, the prescribed equalizer characteristic or the volume level is set in response to the identified program content based on the PTY signal automatically and a problem of the operation that the equalizer curve or the sound volume is to be set again for each change in the program is evaded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a radio receiver that identifies program content based on a program content identification code included in RDS (Radio Data System) transmission data, and particularly relates to a radio receiver that identifies program content based on a program content identification code included in transmission data of an RDS (Radio Data System). 6. Related to a radio receiver that can automatically set predetermined equalizer characteristics and furthermore, a volume level according to an identification code. 6. <Prior art> In car radios, 2. Since it is necessary to re-select a station each time you move and leave the service area of a receiving station, there has been a need for more sophisticated tuning functions. This demand was particularly strong in Europe, where radio broadcasting services mainly consist of FM broadcasting, which has a relatively narrow service area, and where a high proportion of broadcasts are received on car radios. The data system standardized by the European Broadcasting Union to meet this requirement is r<L)S (Radio Data System).

RDS is a method for multiplexing FM broadcasts with various data (data that can be used for automatic selection of the best receiving station, traffic information identification, broadcasting station name display, etc.).

One of those transmitted data is a PTY signal.

The PTY signal has one code for identifying the content of one program, and has individual codes depending on the program content such as classical music, rock music, popular music, and news.

Therefore, the content of the program can be identified by referring to the PTY signal.

<Problems to be Solved by the Invention> By the way, some recent radio receivers have an equalizer function that divides the frequency band and sets the output level for each frequency.6 Listeners can set equalizer curves and adjust the output level to their preference. It is possible to obtain playback band balance.

However, the equalizer curve is classic.

Usually, different characteristics are set for each genre such as rock, and there was an operational problem in that listeners had to reset the equalizer curve and volume every time the program changed. .

From the above, an object of the present invention is to provide a radio receiver that can automatically set predetermined equalizer characteristics and furthermore, a volume level according to the program content identified based on the PTY signal included in the RDS transmission data. It is.

Means for Solving the Problems> FIG. 1 is a block diagram of the main parts of a radio receiver showing an embodiment of the present invention.

5 is an equalizer, 6 is an electronic volume, 10 is an RDS decoder, and 11 is an RI) S data error detection section.

21 is a control unit configured with a microcomputer, 22 is a PTY compatible memory, 37 is a genre selection key (S), and 38 is a memory key (
M), 39 (Mountain to Sun) are preset keys, and 40 is an automatic equalizing key (PTY).

Function> The equalizer characteristics and/or volume level are stored in the PTY compatible memory 2 according to the PTY signal that is the program content identification code.
2, and when the automatic equalizing key 40 is pressed, the control section 21 stores the P'T'Y signal in the P'T'Y compatible memory 22 based on the PTY signal included in the transmission data of the receiving station. The equalizer 5 and electronic volume 6 are controlled to obtain the equalizer characteristics and/or volume level.

<Embodiment> FIG. 1 is a block diagram of essential parts of a radio receiver showing an embodiment of the present invention.

1 is an I) LL circuit, which outputs a predetermined voltage signal to the front end 2 according to the station to be received.

The front end 2 connects the antenna ANT based on the voltage signal.
An IF detector 63 receives a broadcast station input from the front end 2 and generates a predetermined intermediate frequency signal t'IF), and detects the intermediate frequency signal converted by the front end 2. 4 is an MPX, which demodulates the detection output of the IF detector 3 into a stereo signal.

5 is an equalizer which sets an output level for each divided frequency band. Reference numeral 6 indicates an electronic controller 2 which controls the fit based on the volume level data instructed by the control unit 21. (VR), 7 is the amplifier.

8 is a speaker.

Reference numeral 9 denotes a level meter which monitors the detection output level of the IF detector 3. Accordingly, it is possible to judge whether the reception condition of the receiving station is good or bad.

Reference numeral 10 denotes an RDS decoder, which demodulates the PTY signal, etc., which is sent at a predetermined transmission timing and comes in nine.

1] is an error detection unit for RDS data, which detects errors in transmitted 4N data such as PTY signals while synchronizing each group, and corrects the errors. RDS decoder 10
Various types of transmission data including the /I P TY multiplied signal are input to the control section 21 via the r<Ds data error detection section 11 .

Reference numeral 21 is a microcomputer-implemented control unit, and a PTY compatible memory 2 stores equalizer characteristics and/or volume levels corresponding to the PTY multiplication signal, which is the 13-set content identification code 1-.
It has 2. The control section 21 is.

Based on the P 1 'Y signal included in the transmission In data of the receiving station, the equalizer 5 and electronic volume 6 are controlled to achieve the equalizer characteristics and/or volume level stored in the PTY compatible memory 22.

The 3rd floor is the operation/display section, and there are volume keys for increasing and decreasing the volume (VRU I) /
DN key) UP/DN key to increase/down the 321 frequency display, genre text display, etc. UP/DN key 3/1° to increase/decrease the frequency 331 cycle number, etc.Equipped with equalizer curve setting key 35, equalizer curve display 36, etc. are doing.

:) 7 is a genre selection key (S), which calls up genres such as classical, rock, popular, news, etc. one by one, and displays them on the display 33. Note that these genres are based on the RDS PTY signal.

738 is a memory key (M), and the first usage example is to press the memory key 38 and then press the preset keys 39 from ■ to (5) to select the broadcasting station corresponding to the preset keys (5). can be stored in preset storage (not shown). In addition, the second usage example is to press the memory key 38 within 5 seconds after pressing the genre selection key 37,
By pressing a preset key 39 from Mt. to (5), the equalizer curve and volume at the time of pressing are set to the PT corresponding to that preset key (6) along with the genre name.
Can be stored in each storage area of the Y-compatible memory 22.

■~ The preset key 39 at the front can be pressed individually to call up a broadcast station, while the genre selection key 3
If you press within 5 seconds after selecting the genre by 7,
This is the key to recall the equalizer curve for that genre.

40 is an automatic equalizer curve (PToY), and by pressing it, the p'r y of the broadcasting station to be received from now on is
The signal is reproduced using the equalizer curve and fffi stored in the PTY compatible memory 22.

The operation shown in FIG. 1 will be explained below. First, a genre is selected using the genre selection key 37. For example, assume that the lock mode is selected as shown on the display 33.

Next, the equalizer curve is set using the equalizer curve setting key 35, and the volume is set using the volume 32.

After that, press the memory key 38 and press any of the preset keys 39 (6) that you want to store, and the data will be stored in the PTY compatible memory 22 corresponding to the preset key (6).
The equalizer curve and volume you set are stored along with the genre name.

In this way, up to six equalizer curves and sounds -l for each genre are stored. However, the number that can be stored is not limited to six, and may be any number by changing the number of preset keys.

Now, when the automatic equalizer curve 40 is turned on and the lock PTY signal is being demodulated by the RDS decoder 0 and inputted to the control unit 21, the control unit 21 displays the lock display on the display 33 and displays the PTY signal. Compatible memory 2
Equalizer curve data and volume level data corresponding to the lock mode No. 2 are called up and inputted to the equalizer 5 and electronic volume 6 to control frequency characteristics and volume. .

Note that either the equalizer curve or the volume level may be stored in the I)TY compatible memory 22, and for example, only the equalizer curve may be automatically set.

Furthermore, if equalizer curves for the same genre are set to multiple preset keys Taguchi, the last set equalizer curve shall be set. Although the preset keys top to bottom are used as the equalizer curve calling key, they may also be used as other keys, or a separate key may be provided.

<Effects of the Invention> According to the present invention, equalizer characteristics and/or volume levels are stored in accordance with the program content identification code, and a predetermined equalizer curve is set based on the program content identification code included in the transmission data. Since the volume level is set, it is possible to automatically set the predetermined equalizer characteristics and the volume level according to the content of the program, which has the excellent advantage of eliminating the troublesome operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of a radio receiver showing an embodiment of the present invention. 5. Equalizer, 6. Electric -) - Volume. 10...Rri S decoder. 11...RDS data error detection unit; 21...Control unit configured with a microcomputer. 22...PTY compatible memory. 37... Genre selection key (S), 38... Memory key (M). 39 (■~, -a)...Preset key/10...Auto equalizer key (I'TV).

Claims (1)

[Claims] A radio receiver having a function of identifying program content based on a program content identification code included in transmission data of a radio data system, which stores equalizer characteristics and/or volume levels according to the program content identification code. A radio receiver is characterized in that a predetermined equalizer characteristic and/or volume level is set based on a program content identification code included in transmission data.