JPS6130131A - Program discriminating receiver provided with sound recording function - Google Patents

Abstract

PURPOSE:To confirm information contents and the recording time simultaneously by adding a clock data generating circuit, a memory where time data is written, a display device, etc. to a receiver where only desired information programs are recorded and displaying the recording time when a recorded program is reproduced. CONSTITUTION:The demodulated signal demodulated by a tuner 2 of the receiver is applied to a program discriminating signal detecting circuit 3 and a sound recorder 10. Start and end patterns of program information superposed to this demodulated signal are detected by the circuit 3, and the coincidence between these detected patterns and preliminarily set program start and end code patterns 5a and 5b is detected by a coincidence detecting circuit 4. This coincidence detection signal is applied to an FF circuit 7, and desired program information is recorded on the sound recorder 10 by the output of the logic between the output of the circuit 7 and the recording mode set to an FF circuit 13. This recorded program information is reproduced by the output of an FF circuit 12. The logic of the recording and reproducing mode of the sound recorder 10 is operated and is supplied to a memory 8 to read out the stored recording time by a time data generating circuit 13, and the recording time is displayed on a display device 16.

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 radio receivers, and particularly to a program identification receiver equipped with a recording function for automatically recording traffic information, news, 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 a detection means for detecting low frequency power for identification, and traffic information can be heard using the output from this detection 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.

The present invention also provides a program identification receiver having a function of automatically recording a desired broadcast program upon receiving an identification signal, and displaying the time at which the program was recorded when the program is played back. The purpose is to provide

[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 an outline of the format of the programs to be transmitted. Traffic information and other information programs have different start code patterns as shown by X in Figure 2.
2 bits x 4 words are sent for 3 seconds. After this, 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 used as FSX (Frequent Code Pattern).
cy 5hift Keying) modulation
, 1 data. A 12-bit pattern output can be obtained by an FSX demodulator that identifies the pattern output as data of 1.

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 M demodulation.

FIG. 1 is a block diagram showing an embodiment of the present invention.
2 is an antenna, and 2 is a tuner section, the output of which is connected to a tuner output terminal TUOut, from which an audio signal is output.

3 is a program identification signal detection circuit connected to the demodulation output terminal of the tuner section 2, and its output terminal is connected to the coincidence detection circuit 4. Outputs from a program start code pattern setting circuit 5a and a program end code pattern setting circuit 5b are applied to this -number output circuit 4, and the program start code pattern setting circuit 5a is further provided with a program selection switch. 6 is connected.

The first and second output terminals of the above-mentioned multiple calibration output circuit 4 are connected to the set input terminal S and the reset input terminal R of the first R-S flip-flop circuit 70, and further, the first output terminal thereof is connected to the read/write control terminal R/W of the memory 8. Note that when this terminal is set to L, it is read, and when it is set to H, it is written. The Q output terminal of the first flip-flop circuit 7 is connected to one input terminal of an AND circuit 9, and its AN
The output terminal of the D circuit 9 is connected to the recording command signal input terminal REC of the recorder (or semiconductor memory) IO, and also to one input terminal of the OR circuit 11.

The demodulated signal output end of the tuner section 2 is connected to the recorder '10, and the demodulated output is recorded.
12 is a second flip-flop circuit for setting the playback mode of the recorder 10, and its set input terminal S and reset input terminal R are connected by a changeover switch SWP. It is configured so that H output can be applied alternately.The Q output terminal is used for recording @
10 and the other input terminal of the OR circuit 11, and the output terminal of the OR circuit 11 is connected to the chip enable terminal CE of the memory 8.

Reference numeral 13 denotes a third flip-flop circuit for setting the recording mode of the recorder 10, and the set input terminal S and reset input terminal R of the third flip-flop circuit are configured such that an H output can be alternately applied by a switching switch SWR. The Q output terminal is connected to the other input terminal of the AND circuit 9.

14 is a time data generation circuit, the output data of which is applied to the memory 8, and the read data output section of the memory 8 is connected to the segment decoder and driver circuit 1.
5, and the output terminal of the circuit 15 is connected to the display 16.
It is connected to the.

FIG. 3 shows a specific example of the program identification signal detection circuit 3, -number output circuit 4, program start code pattern setting circuit 5a, program end code pattern setting circuit 5b, and program selection switch 6 in FIG. It is. That is, in FIG. 3, the program identification signal detection circuit 3 has a low-pass filter 31, a frequency discrimination circuit 32, and a comparator 33, and the demodulated output of the tuner section 2 is selected by this filter 31 only for the low-frequency component, and is converted into an FSX signal. is taken out. This FS
As described above, the K signal is, for example, a shift keyed signal of 24 Hz and 32 Hz, which is discriminated by the frequency discrimination circuit 32 and extracted as a digital signal.

This 12-bit digital signal is applied as a serial signal to the shift register 41, which converts this serial signal into a parallel signal and provides it to the terminal Do"-Do. Then, each output terminal Do" of this shift register 41 D
tf is connected to each one input terminal of an exclusive OR circuit (hereinafter referred to as EX-OR) 42. (
(In FIG. 3, EX-OR is shown as a representative one, and the others are omitted.) In addition, each other input terminal of this EX-OR 42 is connected to the output terminals of 12 columns in the program start code pattern setting circuit 5a. Each EX-OR 42 compares each bit between the shift register 41 and the program start code pattern setting circuit 5a. Each comparison output of this EX-OR 42 is inputted to a NOR circuit 43, and therefore, the above NO is executed only when each bit of the shift register 41 and each bit of the program start code pattern setting circuit 5a all match.
It acts so that the R circuit 43 provides an H output.

Similarly to the above, each output terminal Da-D1 of the shift register 41
1 is connected to each input terminal of the EX-OR 44, the cultural input terminal is connected to each output terminal of the program end code pattern setting circuit 5b, and the output of each EX-OR 44 is input to a NOR circuit 45. . Therefore, the NOR circuit 45 produces an H output only when the bits of the shift register 41 and the program end code pattern setting circuit 5b all match.

The program selection switch 6 is composed of, for example, a button switch that can be turned on or off independently, and by turning it on, a predetermined number corresponding to a specific program is selected.
The 2-bit pattern is the program start code pattern setting circuit 5.
A is output as parallel data.

In the above configuration, when the desired program selected by the program selection switch 6 is started, an H output is applied from the -number output circuit 4 to the set input terminal S of the first flip-flop circuit 7, and the flip-flop circuit The circuit 7 enters the set state.

Furthermore, the coincidence output H from the several-sheet output circuit 4 is applied to the read/write control terminal R/W of the memory 8.

Here, when an H output is applied to the set input terminal of the third flip-flop circuit 13 as shown in FIG. An H output is provided to the recorder 10, and the recorder 10 starts recording the demodulated signal from the tuner section 2. At the same time, since an H output is applied to the enable terminal CE of the memory 8 via the OR circuit 11, the time data from the time data generation circuit 14 is written into the memory 8. For example, if this writing is 9:12, then 10
It is written in BCD code such as 01,0001,0010.

When the broadcast of the information program ends, the coincidence detection circuit 4 selects the first flip-flop circuit 7 based on the program end code.
Since the H output is applied to the recent input terminal R of the
The output becomes L, and the recording command signal input terminal of the recorder 1O also becomes low. The recorder therefore stops recording.

Next, when the switch SWP is changed from the state shown in the figure, the second flip-flop circuit 12 becomes set state, its Q output becomes H, and the playback command signal input terminal P of the recorder 10 is set.
applied to LAY, the recorded content is played back, and the output terminal Out
brought to you. At the same time, the H output from the Q output terminal is applied to the enable terminal CE of the memory 8, so the recording time data recorded in the memory 8 is applied to the segment decoder and driver circuit 15, and the display connected thereto. The time display is performed by the time display 16.

FIG. 4 shows another embodiment of the present invention, which is equipped with different recorders 101 to 104 for each type of information program, and the same reference numerals as in FIG. 1 indicate the same parts. .

This is equipped with flip-flop circuits 71 to 74, one of which is set according to several types of information programs, and program selection switches 81 to S4, and one of the switches S+"Sa or A plurality of switches are turned on, and the Q output of the flip-flop circuit 71, which is set when the switches 81 to S4 are closed and the desired information program is broadcast, is ANDed to the AND circuits 91 to 9.
4, one of the recordings M! &101~104 RE
It works by sending an H output to the C terminal to start recording.

At this time, an H output is applied to the R/W terminal of the memory 8 through the OR circuit 17, and one of the OR circuits 111 to 11
The H output is applied to CB of the memory 8 via the 4 and the OR circuit 11. Also, the H output corresponding to each broadcast program is sent to the AoN of the memory 8 via OR circuits 111 to 114.
In addition to the memory address indicated by Ax, time data is written to each area.

In addition, in the case of reproduction, any of the AND circuits 91' to 94
’ H output is from the PLA of any of the recorders 101 to 104.
OR circuit 1 is added to the Y terminal and connected to the memory address An""A3 of memory 8 corresponding to the recorder that is played at the same time.
11-113 provides an H output.

As a result, the time when the recorder that is being played back records is displayed on the display 1.
6 can be displayed.

〔Effect of the invention〕

Since this invention is configured as described above, it is possible to record a desired information program, and when it is played back, the recording time can be displayed, so that the information content and You can check the recording time at the same time,
Its usefulness is extremely high.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a format diagram of a program in a broadcasting system used in this invention, and FIG. 3 is a specific example of a program identification signal detection circuit and a number configuration circuit. A wiring diagram showing an example. FIG. 4 is a wiring diagram showing another embodiment of the present invention. 1...Antenna, 2...Tuner unit, 3...Program identification signal detection circuit, 4...-Several output circuit, ? ,12,
13...Flip-flop circuit, 8...Memory, 9
...AND circuit, 10-...recorder, 11...OR
Circuit, 14... Time data generation circuit, 15... Segment decoder and driver circuit, 16... Display device.

Claims (1)

[Claims] In a receiver that receives broadcast waves with a program identification code superimposed on a carrier wave or a part of the audio band, upon receiving the program identification signal obtained from the carrier wave or the received demodulated output, a reception time signal is written, and the received demodulated output is recorded. means for reading out a reception time signal when reproducing the recorded content of the reception demodulation output, and means for displaying the reception time at which the program was recorded based on the read reception time signal. Program identification receiver with recording function.