JPS6130128A - Program discriminating receiver provided with sound recording function - Google Patents

Abstract

PURPOSE:To record automatically desired information programs and hear only required information or many kinds of information by setting preliminarily required program to be heated in the receiver side. CONSTITUTION:Broadcast information decoded by an FM tuner 2 and an AM tuner 3 is not only outputted from a speaker 5 through an interlocking changeover switch 4 but also inputted to a sound recorder 7. The demodulated output from tuners 2 and 3 is applied to a program discriminating circuit 8, and start and end pattern of special information superposed to a carrier wave or an audio band are detected and are applied to a coincidence detecting circuit 9. A program start code pattern 10 and a program end code pattern 11 set preliminarily by a program selecting switch 12 are applied to this circuit 9, and the coincidence between these set patterns and patterns detected by the circuit 8 is detected. The detection output of the circuit 9 is applied to an FF circuit 13, and the sound recorder 7 is controlled by outputs Q and Q' of the circuit 13 to record desired information programs, and only required information or many kinds of information are heard.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention receives broadcast radio waves on which a program identification signal is superimposed when broadcasting specific information such as traffic information, weather forecasts, or news. The present invention relates to a radio receiver, and particularly to a program identification receiver equipped with a recording function for automatically recording traffic information, etc.

[Conventional technology]

The traffic information broadcasting system (commonly known as ARI) currently in use in West Germany uses AM to superimpose a low frequency signal for identification on 57 KHz, and this signal is constantly sent out while traffic information is being broadcast.

Therefore, the receiver side is equipped with means for detecting a low frequency signal for identification, and traffic information can be heard using the output from this means as a key.

However, in such a system, although it can be effectively used to transmit one specific piece of information, such as traffic information, it can also be used to transmit different types of programs, such as weather forecasts and news, depending on the type. There is a limit to how many types of discrimination can be made so that only the necessary things can be heard.

[Purpose of the invention]

Therefore, this invention transmits a different program identification code for each type of program, and the receiver side sets the necessary listening programs in advance, so that only one type of necessary information or multiple types of information can be transmitted. It is an object of the present invention to provide a program identification receiver that can receive such broadcasting systems.

Further, the present invention provides a multi-band receiver that can receive at least two bands, and when a desired information program is broadcast on the other band while listening to the broadcast on one band, an identification signal is used. A program that has a function to automatically record the broadcast program, and after listening to the broadcast program of one band, it is possible to play back and listen to the information program broadcast on the other band again. The purpose is to provide an identification receiver.

[Embodiments of the invention]

As mentioned above, this invention is capable of identifying and receiving the information content sent by broadcasting, but before explaining the configuration of the receiver, we will explain the broadcasting method used in this invention. There will be a need.

Figure 2 shows the outline of the format of the programs to be sent out.Traffic information and other information programs have different starting code patterns as shown by X in Figure 2.
2 bits x 4 words are sent for 3 seconds. After that, traffic information etc. are sent, and when this ends, a termination code pattern of 12 bits x 4 words is sent for 3 seconds as shown by Y, and the program moves on to the next program B.

This start and end code pattern takes, for example, 24Hz and 32Hz in the audio signal, and is called FSK (Frequency
cy 5hift Keying) modulation
．． The pattern is sent out as 1 data. Therefore, on the receiver side, a 12-bit pattern output can be obtained by an FSK demodulator that discriminates between 24 Hz and 32 Hz.

The start code pattern at this time can be set in various combinations within the range of several bits out of 12 bits, and the combination of 1 and 0 can make it possible to identify many types of broadcast content. can. Note that there is no problem in operation if only one type of termination code pattern is set.

The broadcasting system explained above is an example in which an identification signal is superimposed on the low frequency part of an audio signal, but for example, in the case of medium wave radio broadcasting, it is also possible to frequency modulate the carrier wave and send out an FSK signal. In this case, the intermediate frequency signal is F on the receiver side.
The FSK signal can be extracted by performing M demodulation.

FIG. 1 is a block diagram showing an embodiment of the present invention;
is an antenna, 2 is an FM tuner section, and 3 is an AM tuner section. Reference numeral 4 denotes an interlocking changeover switch, which has a function of exclusively drawing out each demodulated output of the FM tuner section 2 and AM tuner section 3, and one output, that is, the FM tuner output in the state shown in FIG. 1, is sent to the amplifier 5. The signal is applied, amplified here, and reproduced from the speaker 6. The other output, that is, the AM tuner output, is applied to the recorder 7.

The output applied to this recorder 7 is directly applied to a program identification signal detection circuit 8, and its output end is connected to a coincidence detection circuit 9. Outputs from a program start code pattern setting circuit 10 and a program end code pattern setting circuit 11 are applied to this minus number output circuit 9, and a program selection switch 12 is further applied to the program start code pattern setting circuit 10. It is connected.

The first and second output terminals in the above-mentioned -multiple output circuit 9 are R-
It is connected to the cent input terminal S and reset manual terminal R of the S flip-flop circuit 13, and the Q output terminal of this flip-flop 13 is connected to the recording command input terminal of the recorder 7, and the Q output terminal is connected to the rewind command input terminal. are connected to each.

FIG. 3 shows a specific example of the program identification signal detection circuit 8, -number output circuit 9, program start code pattern setting circuit 10, program end code pattern setting circuit 11, and program selection switch 12 in FIG. be. That is, in FIG. 3, the program identification signal detection circuit 8 includes a low-pass filter 81,
It has a frequency discrimination circuit 82 and a comparator 83,
Only the low frequency components of the demodulated output of the AM tuner section 3 are selected by this filter 81, and an FSX signal is extracted. As mentioned above, this FSK signal has, for example, 24Hz and 32Hz.
This is a shift-keyed Hz signal, which is discriminated by a frequency discrimination circuit 82, and a comparator 83 extracts the shift information as a 12-bit digital signal.

This 12-bit digital signal is applied as a serial signal to a shift register 91, which converts the serial signal into a parallel signal and provides it to the terminal Do''Du.

Each output terminal Do"Dn of this shift register 91
are connected to one input terminal of an exclusive OR circuit (hereinafter referred to as EX-OR) 92. (3rd
In the figure, EX-OR is shown as a representative one, and the others are omitted. - Each bit of the shift register 41 and the program start code pattern setting circuit 10 are compared by OR92. Each comparison output of this EX-OR 92 is input to a NOR circuit 93, and therefore each bit of the shift register 91 and the program start code pattern setting direction path 1
The above N occurs only when all bits in 0 match.

It acts so that the R circuit 93 provides an H output.

Similarly to the above, each output terminal Do"Du of the shift register 91
The input terminals of the EX-OR 94 are connected to the input terminals of the EX-OR 94, and the output terminals of the program end code pattern setting circuit 11 are connected to the other input terminals, and the outputs of the EX-OR 94 are input to the NOR circuit 95. . Therefore, only when the bits of the shift register 91 and the program end code pattern setting circuit 11 all match, the NOR circuit 95 produces an H output.

The program selection switch 12 is composed of, for example, a bush switch that can be turned on or off independently, and by turning it on, a predetermined 12-bit pattern corresponding to a specific program is set in the program start code pattern setting circuit. 1o is output as parallel data.

In the above configuration, the output of the FM tuner section 2 selected by the interlocking changeover switch 4 is amplified by the amplifier 5 and reproduced by the speaker 6. At this time, the output of the AM tuner section 3 is simultaneously applied to the recorder 7.

When a specific information program is played back by the AM tuner section 3, the program start identification code is extracted by the program identification signal detection circuit 8. This code is applied to the shift register 91 of the coincidence detection circuit 9, and the program is selected. It is compared with the program start identification code set by the switch 12. If these numbers match, the -number output circuit 9 outputs the flip-flop circuit 1.
3, and the H output is applied from the Q output terminal of the flip-flop circuit 13 to the recording command input terminal of the recorder 7.

As a result, the recorder 7 starts recording, and the AM tuner section 3
Record information programs by.

When the broadcast of the information program ends in this way, the program end identification code is superimposed and sent out during the broadcast as described above, so that an H signal is sent from the output circuit 9 to the recent input terminal R of the flip-flop circuit 13. applied. As a result, the flip-flop circuit 13 is reversed, the sending of the recording command signal is stopped, and a rewinding command signal is applied to the recorder 7. The recorder 7 will therefore stop recording and will be rewound to the beginning of the tape or to the initial cent point of the tape counter (not shown).

Note that when the interlocking switch 4 is switched, the output of the AM tuner section 3 is reproduced as audio from the speaker 6,
The information program provided by the FM tuner unit 2 is recorded by the recorder 7.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to automatically record a desired information program on another preselected hand while playing and listening to a broadcast program through a speaker. Therefore, after listening to a broadcast program of one band, it is possible to check the desired program broadcast by another band again, which is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a format diagram of a program in the broadcasting system used in this invention, and FIG. 3 is a specific example of a program identification signal detection circuit and a coincidence detection circuit. The wiring shown is a diagram. 1... Antenna, 2... FM tuner section, 3...
AM tuner section, 4... interlocking changeover switch, 5...
Amplifier, 6... Speaker, 7... Recorder, 8...
Program identification signal detection circuit, 9... Coincidence detection circuit, 13.
...Flip-flop circuit. Patent applicant Pioneer Co., Ltd. Figure 1 Rattan 2nd cause

Claims (1)

[Claims] A receiver that receives broadcast waves in which a program identification signal is superimposed on a carrier wave or part of an audio band includes a first tuner section that receives and demodulates a first broadcast band, and a second tuner section that receives and demodulates a second broadcast band. a tuner section, a switch means for exclusively selecting the demodulated outputs of the first and second tuner sections, a means for amplifying the first output selected by the switch means and reproducing it as an audio signal; Coincidence detection means receives the second output selected by the switch means as an input and detects a coincidence between a program start code obtained from the carrier wave or the received demodulated output and a program start identification code preset on the receiver side; A program identification receiver having a recording function, comprising means for receiving the output of the coincidence detecting means and recording a second output selected by the switch means.