JPS6146886B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic device that extracts analog information and digital information from a record carrier such as a magnetic tape that records analog information and digital information in chronological order.

Conventionally, when recording digital information (numeric data) and audio information on the same magnetic tape, it was necessary to record them on separate tracks of the magnetic tape. In addition, when recording both audio and digital information on the same track, the frequency bands were divided during recording, the mid-low range was allocated to audio, and the high range was allocated to digital information, and they were separated using a filter during playback. . However, with this method, the device becomes complicated and the quality of the reproduced audio information deteriorates.

The present invention has been made in view of the above-mentioned drawbacks of the conventional methods, and it is possible to distinguish analog information and digital information taken out from a record carrier with a simple structure, and at the same time improve the sound quality when reproducing analog information. The aim is to provide electronic equipment that can achieve

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

FIG. 2 shows a diagram using the method of the present invention.
Audio information recording part 1 and data information recording part 2
A first delimiter signal 3 and a second delimiter signal 4 are recorded at the boundary. The first delimiter signal 3 notifies that an audio signal will be recorded thereafter, and the second delimiter signal 4 notifies that digital information will be recorded thereafter. In the following example, 8 bits are all 0 as 1 delimiter signal 3.
It is assumed that a one-word code signal is used, and a silence signal for a certain period of time is used as the second delimiter signal 4.

FIG. 2 shows a block diagram of a device according to the invention.

In the figure, a recording/playback head HD is in contact with a magnetic tape MT and exchanges information signals. HA is a recording/playback amplifier that amplifies the recording signal and playback signal of the recording/playback head HD. The gate _G1 connected to this recording/playback amplifier HA is a flip-flop
Based on the reset output signal of _F1 , the output signal from the recording/playback amplifier HA is supplied to the amplifier _A0 . SP is a speaker that outputs audio using the output of amplifier _A0 . NJ is a non-recording position detection circuit, and the output of this circuit is AND gate A ₁
is connected to a counter CO which counts the clock signal CP. The counter CO issues an output signal when it counts up to a certain value, and the flip-flop _F1 is set by this signal. When this flip-flop _F1 is in the set state, the output signal of the reproduction interface _IN1 , which demodulates the signal from the magnetic tape into a digital signal, is output to the AND gate _A2.
is introduced into the CPU via SJ connected to IN ₁ is a detection circuit for a data end code which is the first delimiter signal. This exit code detection circuit
SJ resets flip-flops _F1 and _F2 when the first delimiter signal is input. Therefore, when the first delimiter signal is input from the magnetic tape, the gate _G1 is turned off, so no sound is output from the speaker SP, and the gate _G2 is turned off, so the motor is stopped and tape running is stopped.

To start tape running at this point, the CPU
When the signal _S1 from the (Central Processing Unit) is output, the flip-flop _F2 is set and the gate _G2 is turned on, so that the motor M is connected to the battery B.
The tape is driven by the Above signal S ₁
is a specific key (start key) of key input device K
Output when pressed.

IN ₂ is a recording interface that modulates the binary data output from the CPU to an audible frequency.
If you output to IN ₂ , the data from the CPU will be written to the tape. When recording audio, it is done by passing the microphone MIC through the microphone amplifier AI, which is an amplifier.

RAM is random access memory, ROM
is connected to the CPU as read-only memory.

Next, FIG. 3 is a block diagram of the main parts within the CPU related to the function of storing data on tape. In the figure, K is a key input device having numeric keys, function keys, recording keys, etc. KE is a key encoder, KM is a key memory that stores the contents of pressed keys, and KMC is a memory control circuit for the key memory KM. When the tape recorder section is put into a recording state and the start key in the key input device K is pressed, a signal _S1 is output, and the contents of the keys operated so far are sequentially output from the KM to the recording interface _IN2 . Then, when the output signal to _IN2 is finished, the CPU outputs the signal _S2 , the flip-flop _F2 is reset, and tape running is stopped.

Next, a specific usage example of the device according to the present invention will be explained. If the data information and audio information stored on the tape described above are used, it can be used as a learning machine.

That is, a voice reciting one calculation problem is recorded in the recording area, and the data of the calculation problem is recorded in the data area with the second delimiter signal in between.

When the operator first presses the start key, the tape is played and a verbal calculation problem is asked.
The operator solves the problem and enters the calculated answer using the keys. Further, since the data signal of the calculation problem is reproduced from the data area of the tape after the audio area, the CPU loads the data, that is, the calculation problem, and performs the calculation. Then, the CPU detects a match between the operator's answer and the result of calculation by the CPU, and accordingly notifies whether the operator's answer is correct or incorrect by a display or a signal sound. If you want to solve the next problem, press the start key. Another method of use may be to store not a calculation problem but a question that only requires a YES or NO answer in the form of voice, and store the answer (YES or NO) in the data area as data. Also, so-called multiple-choice questions, where you prepare many answers and choose the correct answer from them, can be done in the same way.

As described in detail above, according to the present invention, the reproduction sound quality of analog information and digital information extracted from a record carrier can be significantly improved compared to the conventional technology.

In other words, conventionally, digital information for delimiting, for example, is provided at the beginning of digital information, and analog information for delimiting is also provided at the beginning of analog information, so when digital information or analog information is used, subsequent delimiting information is provided. Because of the need to search for analog or digital information, both analog and digital circuits are forced to operate simultaneously, and noise from one circuit adversely affects the other, resulting in a significant deterioration in the quality of reproduced audio.

In contrast, according to the present invention, when digital or analog information is used, the subsequent delimiting information always corresponds to digital or analog information, and therefore only one of the circuits always operates. . Therefore, the quality of reproduced audio of both analog and digital information can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a storage means according to the present invention, FIG. 2 is a block diagram of an electronic device according to the present invention, and FIG. 3 is a partial block diagram of an electronic device according to the present invention. In the figure, 1: audio information, 2: data information, 3: first delimiter signal, 4: second delimiter signal, MT: magnetic tape, HD: recording/playback head, HA: recording/playback head.
Regenerative amplifier, G ₁ , G ₂ : gate, F ₁ , F ₂ : flip-flop, AO, AI: amplifier, SP: speaker,
NJ: Non-recording position detection circuit, CO: Counter,
IN ₁ : Playback interface, SJ: End code detection circuit, CPU: (Central Processing Unit),
M: Motor, B: Battery, K: Key input device, MIC: Microphone, RAM: Random access memory, ROM: Read only memory, KE: Key encoder, KM: Key memory, KMC: Memory control circuit, IN ₂ : Recording interface.

Claims (1)

[Claims] 1. Information is interposed between each division so that digital information for separating information is placed at the beginning of analog information such as audio, and analog information for separating information is located at the beginning of digital information such as numerical values. a record carrier, such as a magnetic tape, for recording both information in chronological order, means for detecting information in both sections of the record carrier, and information extracted from the record carrier based on the detection result of the detecting means An electronic device characterized by comprising means for distinguishing information into analog information and digital information.