KR830009554A - Simultaneous recording and playback of mono and tape cassettes and apparatus therefor - Google Patents

Abstract

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Description

Simultaneous recording and playback of mono and tape cassettes and apparatus therefor

Since this is an open matter, no full text was included.

1 is a schematic diagram of a recording method of the present invention.

2 is a main circuit diagram of a recording apparatus of the present invention.

3 is a schematic diagram of a regeneration method of the present invention.

4 is a main circuit diagram of a playback apparatus of the present invention.

Claims (4)

In the method in which the character information is separated into serial data of the high signal H and the low signal L by the microprocessor HP1, and recorded on the cassette tape together with the audio signal through the automatic volume control circuit ALC. Localize the signal through a low pass filter (LPF ₁ ) to a low frequency below the frequency (f ₁ ) and interrupt by an analog switch (S ₁ S ₂ ) controlled by the high signal (H) and low signal (L) of the character information. Characters of the mono cassette tape characterized in that the output of the two oscillators (OSC ₁ , OSC ₂ ) of the oscillation frequency (f ₂ f ₃ ) is added to the adder (A ₄ ) and recorded on the cassette tape in a conventional manner. Voice simultaneous recording method. Connect the audio input to the buffer amplifier (IC ₁₄ ) via a low pass filter circuit (LPF ₁ ) consisting of an operational amplifier (IC ₁₂ , IC ₁₃ ) and a resistor (R ₂₇ to R ₃₄ ) capacitors (C | ₃₆ to C ₃₉ ). Connect the outputs of conventional oscillators OSC ₁ and OSC _{2 with} oscillation frequencies f ₂ and f ₃ to the buffer amplifiers IC ₁₅ and IC ₁₆ , but output the buffer amplifiers IC ₁₄ , IC ₁₅ and IC ₁ ⁶ . Are connected jointly to the non-inverting input terminal (+) of the operational amplifier (IC | ₁₇ ), and the output switch terminal (OE) of the buffer amplifier (IC ₁₄ ) is connected to a + 5V power supply via a resistor (R ₃₈ ). The output switch terminals OE of the buffer amplifiers IC ₁₅ and IC ₁₆ are connected to the high input H-INPUT and the low input L-INPUT through resistors R ₅₄ and R ₅₆ , respectively. Simultaneous recording of text and voice on mono cassette tapes. The audio signal and the character information recorded on the cassette tape are reproduced, and the audio signal is output to the speaker SP by the voice amplifier (AF-amp), and the character information is separated into the high (H) and low (L) signals, and the microprocessor In the method of converting into a TV video signal by means of MP2 and displaying it on a TV screen, the reproduction output of the cassette tape recorded by the recording method described above is separated by only the audio signal by a low pass filter LPF2, AF-amp), and only the character information signal is separated by the high pass filter (HPF), and high only when there are inputs of the frequencies f ₂ and f ₃ to the first and second detectors DET ₁ and DET ₂ , respectively. (H) signal and low (L) signal output characterized in that the simultaneous reproduction of the character and voice of the mono cassette tape. The playback output of the cassette tape is fed through a low pass filter (LPF ₂ ) consisting of operational amplifiers (C ₁ , IC ₂ ) and resistors (R ₃ to R ₆ ) and capacitors (C ₂ to C ₅ ). amp) coupled to and at the same time, the operational amplifier (IC ₅₎ and a resistor (R _13, ~ R ₁₄₎ capacitors (C _15, C ₁₆₎ a through the high-pass filter (HPF) resistance (R ₁₅ ~ R ₁₈ a) a capacitor ( C ₁₇ to C ₂₀ ) and a voice and audio recording apparatus of a mono cassette tape, characterized in that connected to the first and second detectors DET ₁ and DET ₂ having a face lock loop (IC ₆ , IC ₇ ). ※ Note: The disclosure is based on the initial application.