KR100271182B1 - Method for recording a signal in a video cassette recorder - Google Patents

Abstract

PURPOSE: A method for erasing magnetic tape recording signals of a high definition VCR(Video Cassette Recorder) is provided to make a high definition head for treble speed perform a recording mode, and to selectively switch an unused head for treble speed into an oscillatory circuit, so as to prevent an over lap section generation. CONSTITUTION: A microcomputer(30) decides whether predetermined key signals are inputted from a key input unit(40). If a recording mode key signal is detected, the microcomputer(30) switches a switch(53) within a deck(50) into an oscillatory circuit(51). A head for treble speed(54) erases contents recorded in a magnetic tape. A high definition head for treble speed(55) performs a recording mode. If a special playing key signal is detected, the microcomputer(30) switches the switch(53) into a pre-amplifier(52). The head for treble speed(54) reads signals recorded in the magnetic tape, and transmits the signals to a playing processor(60). If a playing key signal is detected, the microcomputer(30) reads the signals recorded in the magnetic tape, in a standard mode. If a stop key signal is detected, the microcomputer(30) stops a VCR(Video Cassette Recorder).

Description

METHODS FOR RECORDING A SIGNAL IN A VIDEO CASSETTE RECORDER}

The present invention relates to a high-definition video cassette recorder (hereinafter abbreviated as V-seal), and more particularly to a high-definition switch to selectively switch the triple dedicated head to the oscillation circuit part in the recording mode of the high-definition V-seal. The present invention relates to a method of canceling a recording signal in a recording mode of a VR.

V-Cal is an electronic device that makes it possible to record and read image signals by selectively magnetizing a magnetic tape using a video head. That is, recording an image signal on a magnetic tape means that the video head arranges the magnetization directions of the magnetic tape corresponding to the image signal, and reading the image signal of the magnetic tape means that the video head reads the magnetization direction of the magnetic tape. It means to take.

In VR, on the other hand, in a recording mode, a full erasing head is used to erase a video signal recorded on a magnetic tape. In other words, the magnetic tape drawn out by the supply reel in the V-C is contacted to the above-mentioned full width erasing head via a tension arm. It is to erase the contents recorded in. In other words, when the magnetization directions of the magnetic tape are arranged in a certain direction, the magnetic tape is in a so-called blank tape state in which no signal is recorded. Thus, the magnetic width direction of the magnetic tape is arranged in a constant manner.

By the way, there is a problem in the conventional VR recording method using the full width erasing head. That is, because of the structural characteristic of V-Cal, it is mounted at regular intervals from the full-width erasing head to the head drum to which the video head and the like are mounted. Therefore, when the V-AL is in the recording mode, the magnetic tape contacts the full-width erasing head. It takes some time to contact the head. Thus, a problem has arisen that an overlap section may occur on the magnetic tape.

Therefore, the present invention has been made to solve the above-described problem, the object of the present invention is that the three times dedicated high-definition head in the recording mode of the high-definition V-Cal, the oscillating circuit portion of the triple dedicated head that does not use the recording mode The present invention provides a method for erasing a recording signal in the recording mode of a high quality V-Cal to selectively prevent the recording signal by switching over to erase the recording signal.

In order to achieve the above object, the present invention is provided with a head drum of a high quality V-Cal, a triple dedicated head which reads a signal recorded on a magnetic tape by being switched to a preamplifier by a switching switch in a special playback mode, A method of erasing a recording signal in a recording mode of a high-definition V-ray having an oscillating circuit section for generating a high frequency current for erasing a signal recorded on a tape, wherein a triple dedicated head is connected to the oscillating circuit section corresponding to a recording mode key signal input. Provided is a method of canceling a recording signal in a recording mode of a high-definition V-C, comprising a step of switching a switching switch.

1 is a block diagram of a high definition video cassette recorder for performing a recording signal canceling method according to the present invention;

2 is an operational flowchart of a high definition video cassette recorder for erasing a recording signal according to the present invention;

<Description of the code | symbol about the principal part of drawing>

10: tuner

20: recording processing system

30: micom

40: key input unit

50: deck

51: oscillation circuit

52: preamplifier

53: switching switch

54: triple head portion

55: 3 times dedicated high-definition head

60: regeneration processing system

The above objects and various advantages of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a high definition VRC for performing a recording signal erasing method according to the present invention, and includes a tuner 10, a recording processing system 20, a microcomputer 30, a key input unit 40, and a deck 50. And a reproduction processing system 60.

Prior to the description of the block diagram, the high definition V-Cal according to the present embodiment should have a structure of at least 6 heads or more, and the head may be added according to the function of the V-C. It will be easy to see who has it.

As shown, the tuner 10 receives and outputs a broadcast signal of a predetermined channel according to the control of the microcomputer 30, and the recording processing system 20 records and processes audio and video signals of the tuner 10 to the deck. It is applied to 50.

The key input unit 40 is provided with a plurality of function keys (not shown) for controlling the operation of the V-Cal, such as a power on / off key, and receives a key signal corresponding to a key that is input, that is, pressed by a user. It is configured to apply to the microcomputer 30.

The deck 50 is comprised from the oscillation circuit part 51, the preamplifier part 52, the switching switch 53, the triple dedicated head part 54, and the triple dedicated high quality head part 55. As shown in FIG.

Here, the triple dedicated head 54 and the triple dedicated high-definition head 55 are provided in the head drum of the high definition V-Cal, and such internal structure can be easily understood by those skilled in the art. The detailed description is omitted.

The oscillator circuit 51 generates a high frequency current for erasing a signal recorded on the video tape, and the preamplifier 52 is a video provided to the triple dedicated head 54 or the triple dedicated high quality head 55. Amplify and output the recording signal on the tape.

In addition, the changeover switch 53 according to the present embodiment performs a switching operation so that the above-described triple dedicated head 54 can be switched to the oscillation circuit portion 51 or the preamplification portion 52 under predetermined control. That is, the triple dedicated head 54 is switched to the preamplifier 52 in the special playback mode of the VR to read the signal recorded on the videotape, and the triple dedicated in the recording mode of the BCial. By using the high-definition head 55 to record a predetermined signal on the video tape, the triple dedicated head 54 is switched to the oscillation circuit section 51 so that the signal recorded on the video tape can be erased.

On the other hand, the deck 50 is configured to record the video signal of the recording processing system 20 to the video tape under the control of the microcomputer 30, or to read the signal of the video tape and apply it to the reproduction processing system 60.

Along with the above-described configuration, a detailed description will be given with reference to the flowchart of FIG. 2, which is accompanied by an operation procedure of a high quality VRL for recording signal cancellation according to a preferred embodiment of the present invention.

First, the microcomputer 30 determines whether a predetermined key signal is applied from the key input unit 40 in step S102.

As a result of the determination in step S102, when the recording mode key signal is detected, the microcomputer 30 proceeds to step S104 to switch the switching switch 53 in the deck 50 to the oscillation circuit section 51. In response to the switching operation of the switching switch 53 to the oscillation circuit portion 51, the high frequency current of a predetermined frequency, for example, 8 MHz is induced in the triple dedicated head 54. Therefore, the contents recorded on the magnetic tape are erased by the triple dedicated head 54. At this time, the triple dedicated high-definition head 55 performs the recording mode.

On the other hand, if the special playback key signal is detected as a result of the determination in step S106, the microcomputer 30 proceeds to step S108 to switch the switching switch 53 in the deck 50 to the preamplifier 52. . In response to the switching operation of the switching switch 53 to the preamplifier 52, a signal recorded on the magnetic tape is read by the triple dedicated head 54, and the read signal is subjected to a predetermined amplification process to undergo a reproduction processing system. Provided at 60.

When the playback key signal is detected as a result of the determination in step S110, the microcomputer 30 proceeds to step S112 and reads the signal recorded on the magnetic tape in the standard mode using the head for the standard mode (not shown). In addition, when the stop key is applied, the microcomputer 30 proceeds to step S116 to stop the VSR.

As described above, the present invention has the effect of preventing the overlap (overlap) section formation in the recording mode of the high quality V-Cal.

Claims (1)

A triple dedicated head 54 which is provided in the head drum of the high quality V-CAL and which is switched to the preamplifier 52 by the switching switch 53 in the special playback mode to read out the signal recorded on the magnetic tape; A method of erasing a recording signal in the recording mode of a high quality V-Cal including an oscillating circuit section 51 for generating a high frequency current for erasing a signal recorded on a magnetic tape, And switching the switching switch (53) such that the triple dedicated head (54) is connected to the oscillation circuit section (51) in response to a recording mode key signal input.

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