JPS6057121B2 - Magnetic tape recording/playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a device for outputting audio information and character/graphic information recorded on a magnetic tape, in which the relative interval between output start times of audio information and character/graphic information is variable. This is related to the equipment that comes with it.

A device that records audio information and text/graphic information on a magnetic tape and reproduces it to obtain audio information and text/graphic information almost in parallel, such as a language training machine with a text reproduction function, The text/graphic information is recorded in synchronization with the corresponding audio information, and during reproduction, the audio information and text/graphic information are reproduced one after another as the magnetic tape runs. In a language practice device with a text reproduction function, the student first listens to the teacher's voice as audio information from a magnetic tape, and then repeats the teacher's voice or answers the teacher's questions. After that, the students look at the reproduced text/graphic information and repeat it themselves or check whether their answers are correct or not. In a language practice machine with a character reproduction function, it is necessary for educational effectiveness that the time interval from the reproduction of the teacher's voice until the reproduction of character/graphic information can be varied according to the student's ability. This will be explained in detail below using the drawings.

FIG. 1a is a block diagram of a language training machine with a character reproduction function, and FIG. 1 is a diagram showing the concept of a signal recording form of a magnetic tape on which voice information and character/graphic information are recorded.

In Fig. 1a, 1 is a tape recorder, 2 is an audio amplifier, 3 is a speaker, 4 is a demodulator that modulates text and graphics information onto the tape and extracts it as a pulse signal from the recorded signal, and 5 records text and graphics information. A memory 6 stores characters in units of picture elements, and a character generator that reproduces character signals in units of picture elements according to the encoded signal from the memory 5;
7 is a video player.

Further, in FIG. 1, 9 and 10 are positions on the magnetic tape 8 where audio information is stored, and 9' and 10' are positions on the magnetic tape 8 where character and graphic information corresponding to 9 and 10 are recorded. It's the location.

In FIG. 1a, when a magnetic tape recorded as shown in FIG. 1b is played back by the tape recorder 1, audio information 9 is first outputted from the speaker 3 via the amplifier 2. Next, with a delay equal to the time required for the magnetic tape to travel during section 11 on the tape surface, character/graphic information 9'' is written into memory 5 via demodulator 4, and character generator 6 is driven to reproduce the video. In this operating state, for example, in FIG. Although the magnetic tape running time is fixed at
It is possible to change the relative time interval between audio information and character/graphic information by stopping the magnetic tape running in the middle of step 11 and restarting the tape running after an appropriate period of time.

However, in this case, it is necessary to stop the tape running artificially, and poor operability is a major drawback. Particularly in language practice machines, it is particularly inconvenient to have to perform an operation to stop the tape from running each time. In FIG. 1b, if the distances 11 and 12 on the tape between the character/graphic information and the corresponding audio information are predetermined, an arbitrary time interval can be achieved, but it is possible to adjust the interval to the user's preference. was impossible except for the above-mentioned human manipulation.

In the case of language practice as mentioned above, the teacher speaks at 9, and at 11
The students will speak during the 9" period, and the text or answer of what the teacher said will be displayed in text during the 9" period, but the 11 student period is fixed to a predetermined period, and the time period can be adjusted to suit individual differences. The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a character display that is easy to operate and that can reproduce voice information and character/graphic information at intervals desired by the user. The present invention provides a magnetic tape recording and reproducing device.

In order to achieve the above object, the present inventors provided a switch circuit between a character generator and a video player, and the switch is activated by a leading signal of character/graphic information recorded on a magnetic tape. The circuit is disconnected, a timer whose value is externally set by the user is driven by the end signal of text/graphic information, and the switch circuit is connected when the timer finishes counting.

By setting the timer to an arbitrary value, the user can
It is possible to play back audio information and text/graphic information at desired time intervals.

The present invention will be explained in detail below with reference to FIGS. 2 to 6.

FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a conceptual diagram showing a signal recording format of a magnetic tape used in the apparatus of the present invention. In Figure 2, 1 is a tape recorder, 2 is an audio amplifier, 3 is a speaker, 4 is the same demodulator as shown in Figure 1, 5 is a memory for storing character and graphic information, and 6 is a character A character generator which reproduces a character signal picture element by pixel based on the encoded signal from the memory 5, 7 a video reproducer, 13 a head signal detector for character and graphic information, and 14 a time interval. A setting signal detector (hereinafter referred to as a time detector) 15 is a switch circuit, 16 is a variable resistor, and 17 is a timer. In Fig. 3, 9 and 10 are audio information signals, and 9'' and 1'' are character and graphic signals corresponding to the audio signals 9 and 10.A and B are the leading signals of the character and graphic signals, and time interval settings. signal (hereinafter referred to as a time signal).In the apparatus shown in FIG. 2, when a magnetic tape as shown in FIG. be done.

At the same time, the character/figure signal 9' is demodulated into a pulse signal by the demodulator 4 and supplied to the head signal detector 13 and the time detector 1 memory 5. The leading signal detector 13 disconnects the switch circuit 15 when the leading signal shown in FIG. 3A arrives;
A signal that erases the reproduced image of the video player 7 is generated. When the time signal B subsequently arrives, this time signal B is held in the time detector 14. This time signal B indicates the maximum time interval between the audio signal and the text/figure signal, and the time of this maximum interval is set in the time detector 14 as a digital signal. Next, the character/figure encoded signal D arrives and is stored in the memory 5. On the other hand, the user uses variable resistor 1
6 and set in advance the time interval (in this case, a relative value) after the audio playback ends.

When the end signal C shown in FIG. 2 arrives, the end signal detector 18 detects it and gives a command signal to the timer 17 to start time counting. The timer 17 starts counting in response to this command signal, compares the time value set by the time detector 14 and the value set by the variable resistor 16, and at the time when they match, the timer 17 starts counting. A signal to turn on the switch circuit 15 is generated. When the switch circuit 15 is turned on, the encoded signal of the character/figure stored in the memory 5 is reproduced, the character signal in the character generator 6 is read out, and the character/figure is reproduced on the video player. For example, assuming that the time signal was set to 3 seconds on the tape, time detector 14 would be digitally set to a value of 3 seconds.

On the other hand, if the user sets the variable resistor 16 to the maximum value of 112, when the end signal C arrives, the timer 17 starts counting and generates a signal to turn on the switch circuit 15 after 1 second, which is 112 of 3 seconds. to become) In addition, 19
, 20, and 22 are a time reset signal application lead wire, a timer time setting lead wire, and a timer operation start signal lead wire, respectively. FIG. 4 is a more detailed block diagram of the timer 17 shown in FIG.

When the leading signal detector detects the leading signal, the detection signal becomes 1.
9 is added to the counter 21 to clear the counter. The time signal held in the time detector is transmitted from the conductor 22 to the counter 21.
A voltage corresponding to the maximum time interval is applied to the variable resistor 16 via the D/A converter 23. The output of the counter 21 is sent to the voltage comparator 2 via the D/A converter 24.
5 and is compared with the output of the variable resistor 16 set by the user. The output of the voltage comparator 25 is the switch circuit 1
5, and the D/
Depending on the magnitude of the output of the A converter 24, on and off signals are output, respectively. When the end signal detector 18 detects the end signal, the detection signal 20 is added to the counter 21 to start counting. As the count progresses, the output voltage of the D/A converter 24 increases, and when it exceeds the voltage set by the variable resistor 16, the voltage comparator 25 outputs a signal that turns on the switch circuit 15, and the voltage in the memory 5 is Outputs the text and graphic information written in the video player to the video player. According to the embodiment described above, the user can easily set the time using the knob of the variable resistor 16, and if the variable resistor 16 is set in advance to the maximum value of 112 on the scale, the magnetic Since the maximum time interval of 112 encoded and stored on the tape is always available, there is no need to operate the knob of the variable resistor 16 every time, and a preset function is obtained.

In the above description of the embodiment, a case has been described in which a magnetic tape recorded as shown in FIG. 3 is played back. In FIG. If it is recorded in a position in front of the audio information 9, the reproduction start time of the video information 9'' to the video player 7 can be arbitrarily changed to before or after the reproduction start time of the audio information 9 when being reproduced by the apparatus of the above embodiment. is clear.

In addition, in this case, in FIG. 3, the audio information 9, 1
0 and character/graphic information 9'' and 1'' are recorded on separate tracks on the magnetic tape surface, but by recording character/graphic information between two pieces of audio information, audio information can be recorded on the same track. It is also clear that text and graphic information can be recorded and reproduced.

FIG. 5 shows another embodiment of the present invention, in which the time detector 14 and end signal detector 18 of FIG. 2 are omitted. In FIG. 5, when the leading signal detector 13 detects the leading signal, the switch circuit 15 is turned off, and at the same time, the timer is set according to the output of the variable resistor 16, and the timer starts counting. When the timer finishes counting, a signal that turns on the switch circuit 15 is output.
In the embodiment shown in FIG. 5, the relative time interval between the start of reproduction of the audio information and the video information is determined only by the setting of the variable resistor 16, so the length of the audio/video information is almost constant. Suitable for playing back magnetic tapes. FIG. 6 is a more detailed block diagram of the timer 17 shown in FIG. When counting is completed, a signal to turn on the switch circuit 15 is output from the switch circuit connection signal conductor 28.

Although the above two embodiments have been described using the variable resistor 16, it is clear that the same function can be obtained by using other methods such as a digital switch.

As explained above, when the magnetic tape recording and reproducing device according to the present invention is adopted in a language training machine with a character display function, the user's practice period can be adjusted according to the user's ability, improving the mathematical effect. This is a new feature.

Moreover, manual operation is extremely simple, and operability is improved and efficiency is improved. Furthermore, since there is no need to mechanically stop the tape recorder, the life of the device is extended, making it stable and economical.

[Brief explanation of the drawing]

Figure 1a is a block diagram of a device that has a tape recorder, an audio output device, and a video output device and reads and outputs audio, text, and graphic information on a magnetic tape, and Figure 1b is a block diagram of a device that reads and outputs audio, text, and graphic information on a magnetic tape, and Figure 1b shows audio information on a magnetic tape. FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a conceptual diagram showing the signal recording format of the magnetic tape used in the device of the present invention. 4 is a block diagram of the timer used in FIG. 2, FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 6 is a block diagram of the timer used in FIG. 14... Time detector, 15... Switch circuit, 16... Variable resistor, 17... Timer.

Claims (1)

[Claims] 1. In a magnetic tape recording and reproducing device having a reproducing means for reproducing the audio signal and the character/graphic information signal from a magnetic tape storing the audio signal and the character/graphic information signal, the character/graphic information signal reproduced by the reproducing means is a storage means for temporarily storing; a setting means for setting a reproduction time interval of the audio signal and the text/graphic information signal; and a setting means for setting the reproduction time interval of the audio signal and the text/graphic information signal; 1. A magnetic tape recording and reproducing apparatus, comprising means for delaying the reading of the audio signal and the character/graphic information, thereby making it possible to change the relative time interval during reproduction of the audio signal and character/graphic information.