KR19980022519U - Easy recording and playback device - Google Patents

Abstract

The present invention relates to a simple recording and reproducing apparatus, comprising: a tuner section for receiving and tuning modulated TV broadcast signals from a modulator, an intermediate frequency processing section for converting an information signal of high frequency tuned by the tuner section into an intermediate frequency signal; A reception signal processing section for processing video and audio signals demodulated by the intermediate frequency processing section, an intermediate frequency up / down section for low-frequency converting the recording information signal demodulated by the intermediate-frequency processing section or high-frequency converting the reproduction information signal; And a head deck section connected to one end of the intermediate frequency up / down section for recording or reproducing the information signal on the video tape, so that the input information signal is subjected to low-conversion processing and to directly record and record the low-conversion signal. Re-modulation and demodulation circuits are not required for recording and recording, thus simplifying the circuit configuration of the system. As circuits are reduced, the manufacturing cost of the system can also be reduced.

Description

Easy recording and playback device

This paper relates to a simple recording / playback apparatus. In particular, the low-frequency conversion processing of input recording information signals and direct recording and recording of the low-converted signals provide simple recording and playback without the need for re-modulation and demodulation circuits. It's about the device.

In general, a recording / playback apparatus is, for example, a VTR system that records a video signal (black and white and color) of a TV on a magnetic tape and reproduces it so that it can be displayed as an image. In principle, the tape head is similar to a tape recorder, but since the frequency band of the video signal is wider than that of the audio signal, the relative speed of the tape head needs to be high. For this reason, a video signal is recorded by rotating a head drum having four or two heads at a speed of several hundred times per second at right angles to the tape travel direction. In addition, in addition to broadcasting, two-headed or one-head simple VTRs are currently used for home and industrial use.

Then, an example of such a VTR system will be described with reference to FIG. 1, from a modulator unit 71 for modulating or switching a multi-channel TV broadcast signal input through an antenna 70, and from the modulator unit 71. The video and audio signals are demodulated by a tuner unit 72 for receiving and tuning modulated TV broadcast signals and an intermediate frequency processor 73 for demodulating high-frequency information signals tuned by the tuner unit 72. An information signal processing unit 74 for processing and an information signal processed by the information signal processing unit 74 for recording signal processing, for example, the luminance signal Y is FM modulated and the color signal C is a low frequency conversion signal processing. A recording signal processing section 75, a head 76 for recording the information signal modulated by the recording signal processing section 75 on a tape, and an information signal reproduced from the head 76, that is, an FM signal. The playback signal processor 77 is provided.

The information signal processor 74 is connected to a display 78 for displaying a video signal as an image and a speaker 79 for emitting an audio signal.

On the other hand, looking at the operation of the conventional VT system configured as described above, for example, if the user wants to record the TV broadcast signal, the TV broadcast signals of the multiple channels input through the antenna 70 is a modulator unit 71 The modulator 71 is inputted to the RF out stage (RF OUT) and the tuner unit 72. Then, the tuner unit 72 receives the channel signal set by the user from among the inputted broadcast channel signals. It tunes and inputs the tuned high-frequency channel signal to the intermediate frequency processor 73. The intermediate frequency processor 73 demodulates the tuned high frequency information signal and inputs it to the information signal processor 74. In addition, the information signal processing unit 74 processes the input information signal into video and audio signals, that is, signal shaping, and inputs it to the recording signal processing unit 75 and, optionally, the display 78 and the speaker 79. Then, the information signal inputted to the recording signal processing unit 75 is a recording signal processing. For example, the luminance signal Y is FM-modulated and the color signal C is low-frequency conversion signal processing of the input image information signal. To be written on tape.

On the other hand, in the case of reproduction, the information signal of the FM signal read from the head 76 is amplified by the reproduction signal processing unit 77 and then input to the information signal processing unit 74. Then, this information signal processing unit 74 The input reproduction signal is processed by the video and audio signals and input to the display 78 and the speaker 79. Accordingly, the display 78 displays the reproduced video signal as an image and emits the reproduced audio signal through the speaker 79.

However, in the conventional recording and reproducing apparatus as described above, when the recording function or the reproducing function is executed, the information signal modified and demodulated by the intermediate frequency processing unit 73 is changed by the recording signal processing unit 75 or the reproduction signal processing unit 77 again. Since the demodulation signal has to be processed, the circuit configuration is very complicated, and since the modulation and demodulation process is repeated, the signal processing is performed.

In order to solve the above-mentioned shortcomings, this paper is designed to low-convert the modulated signal and directly record and record the low-converted signal, thereby eliminating the need for a remodulation circuit according to the recording. It is an object of the present invention to provide a simple recording and reproducing apparatus capable of simplifying a circuit configuration of a system.

Another object of this paper is to provide a device that can reduce the manufacturing cost of the system according to the reduced internal circuitry.

In order to achieve the above object, the present invention provides a tuner unit for receiving and tuning modulated TV broadcast signals from a modulator, an intermediate frequency processing unit for converting an information signal of high frequency tuned by the tuner unit into an intermediate frequency signal; A reception signal processing section for processing video and audio signals demodulated by the intermediate frequency processing section, an intermediate frequency up / down section for low-frequency converting the recording information signal demodulated by the intermediate-frequency processing section or high-frequency converting the reproduction information signal; And a head deck portion connected to one end of the intermediate frequency up / down portion for recording or reproducing the information signal on the video tape.

1 is a block diagram illustrating a conventional recording and reproducing apparatus.

2 is a block diagram illustrating the apparatus of the present invention.

Explanation of symbols for the main parts of the drawings

1 antenna 2 modulator

3: tuner portion 4: intermediate frequency processing portion

5: reception signal processing unit 6: intermediate frequency up / down part

7: head deck portion 8: first switch

9: second switch 10: microcomputer

11: key input unit 12: display

13: speaker

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the present invention includes a modulator unit 2 for modulating or switching a multi-channel TV broadcast signal input through an antenna 1, and receiving modulated TV broadcast signals from the modulator 2. A tuner section 3 for tuning, an intermediate frequency processing section 4 for demodulating high frequency information signals tuned by the tuner section 3, and a signal demodulated by the intermediate frequency processing section 4 are used for video and audio. A reception signal processing section 5 for signal processing, an intermediate frequency up / down section 6 for low-pass converting the recording information signal demodulated by the intermediate frequency processing section 4 or high-frequency converting the reproduction information signal, and the intermediate frequency It is composed of a head deck portion 7 connected to one end of the down / down portion 6 to record or reproduce an information signal on a video tape.

The modulator section 2 is provided with a first switch 8 capable of switching a line signal or a TV broadcast signal. The other end of the modulator section 2 is provided with a line signal input. A second switch 9 for switching the seed signal and the internal line signal is connected. The modulator 2 switches the signal modulated by the line signal and the broadcast signal input through the antenna 1 to be output to the RF out stage. A changeover switch 14 is provided.

In addition, one end of the first and second switches 8 and 9 is connected with a microcomputer 10 for controlling overall functions of the system, and one end of the microcomputer 10 is connected with a key input unit 11. . In addition, the reception signal processor 5 is connected to a display 12 for displaying an image signal as an image and a speaker 13 for emitting an audio signal.

Next, the operation of the present invention having the above configuration will be described.

For example, when the user sets the TV broadcast recording mode through the key input unit 11, the microcomputer 10 recognizes this and connects the first switch 8 to the TV terminal. Then, the modulator unit 2 modulates the TV broadcast signals of the various channels input through the antenna 1 and inputs the first switch 8 to the tuner unit 3 via the tuner unit 3. Selects a channel signal set by the user among the inputted broadcast channel signals and inputs the tuned high-frequency channel signal to the intermediate frequency processor 4. The intermediate frequency processing section 4 then demodulates the tuned high frequency information signal and inputs it to the intermediate frequency down / down section 6. Then, the intermediate frequency up / down part 6 performs the low-frequency conversion processing on the input high frequency information signal and inputs it to the head deck part 7. The head deck unit 7 then records the low-conversion information signal on the tape.

On the other hand, during reproduction, the low frequency information signal reproduced by the head deck portion 7 is input to the intermediate frequency up / down portion 6. Accordingly, the intermediate frequency spill / down section 6 converts the inputted low frequency reproduction information signal into the original intermediate frequency signal and inputs it to the intermediate frequency processor 4. Then, the reproduction information signal input from the intermediate frequency processor 4 is processed by the intermediate frequency signal and input to the reception signal processor 5. Accordingly, the reception signal processor 5 inputs the reproduced information signal to the video and audio. The signal is processed and input to the display 12 and the speaker 13. Accordingly, the display 12 displays the reproduced video signal as an image and emits the reproduced audio signal through the speaker 13.

On the other hand, when the recording information signal is input from an external VT system, for example, the microcomputer 10 sets the first switch 8 to the line terminal and the second switch 9 is the line signal in. Switch to. Therefore, the recording information signal input from the outside is input to the tuner unit 3 via the first and second switches 8 and 9, and thus is recorded in the head deck unit 7 through the above-described recording process.

On the other hand, the changeover switch 14 is to switch the signal of the RF-out terminal signal is set among the broadcast signal or VRC signal.

As described above, this paper low-converts the modulated signal and directly records and records the low-converted signal, thereby eliminating the need for a remodulation circuit according to the recording, thereby simplifying the circuit configuration of the system. In addition, since internal circuits are reduced, the manufacturing cost of the system can be lowered accordingly.

Claims (2)

A tuner section 3 for receiving and tuning modulated TV broadcast signals from the modulator 2 and an intermediate frequency processing section 4 for converting information signals of the high frequency tuned by the tuner section 3 into intermediate signals; In the provided recording and playback apparatus, A reception signal processing section 5 for processing video and audio signals demodulated by the intermediate frequency processing section 4, and low frequency conversion of a recording information signal demodulated by the intermediate frequency processing section 4 or a high range of a playback information signal. And a head deck portion 7 connected to one end of the intermediate frequency spill / down portion 6 for converting and recording or reproducing an information signal on a video tape. Simple recording and playback device. A first switch (8) for switching a line signal or a TV broadcast signal is provided between the modulator (2) and the tuner section (3), and another end of the modulator (2). And a second switch (9) for switching an external line signal.