KR20000002069U - Digital VR record / playback device - Google Patents

Abstract

The present invention relates to a digital VRL. When recording the signals of channel 1 and channel 2 on a tape, the input channel signals are separated by two amplifiers, respectively, and then amplified. It is an object of the present invention to provide a digital VR recording / reproducing apparatus which can reduce cross talk between channels by applying the channel 1 and channel 2 heads independently.

For this purpose, the input signal ch1_in of the channel 1 is received and amplified to a predetermined level, and then recorded on a tape through the channel 1 head 210 under the control of the controller 240, and the channel 1 head 210. A channel 1 recording / reproducing unit 200 for amplifying and reading the signal read by the control unit 240 under the control of the control unit 240 and then outputting it (ch1_out); The input signal ch2_in of the channel 2 is received and amplified to a predetermined level, and then recorded on a tape through the channel 2 head 230 under the control of the controller 240, and the signal read by the channel 2 head 230. A channel 2 recording / reproducing unit 220 for amplifying and outputting (ch2_out) the signal according to the control of the controller 240; It is achieved by including a control unit 240 for controlling the recording and playback of the channel 1 recording / reproducing unit 200 and the channel 2 recording / reproducing unit 220.

Description

PLAYBACK / RECORDING APPARATUS FOR DIGITAL VCR

The present invention relates to a digital VRL, and more particularly, to a digital VRL recording / reproducing apparatus for reducing crosstalk between channels generated when playing or recording a video or audio recorded on a tape. will be.

In the conventional digital VR recording / reproducing apparatus, as shown in FIG. 1, the recording amplifier 100 for amplifying the input signals ch1 / ch2_in of channels 1 and 2 input at the time of recording on a tape to a predetermined level. ; A first switch (101) for determining whether to apply the signal amplified by the input amplifier (100) to the channel 1 and channel 2 heads (110, 120); A channel 1 reproducing amplifier (120) for receiving a reproducing signal of the channel 1 read from the channel 1 head (110) and amplifying and outputting a predetermined level (ch1_out); A second switch (121) which determines whether to apply the reproduction signal read from the channel 1 head (110) to the channel 1 reproduction amplifier (120); A channel 2 reproduction amplifier 140 which receives a reproduction signal of channel 2 read from the channel 2 head 130 and amplifies and outputs a predetermined level (ch_2); The second switch 141 determines whether to apply a reproduction signal read from the channel 2 head 130 to the channel 2 reproduction amplifier 140.

This will be described in detail with reference to the accompanying drawings.

When the user inputs a recording key through the key input unit 160 to record a signal on the tape, the controller 150 turns on the second switch 121 and the third switch 141, while the first switch is turned on. 101 is turned off.

Accordingly, the channel 1 and channel 2 input signals ch1 / ch2_in, which are input to the recording amplifier 100 and amplified to a predetermined level suitable for recording, are applied to the channel 1 head 110 and the channel 2 head 130, and onto the tape. Is recorded.

In this case, since the second switch 121 and the third switch 141 are turned on, the channel 1 and channel 2 input signals ch1 / ch2_in through the channel 1 head 110 and the channel 2 head 130 are channels. It is not applied to the first reproduction amplifier 120 and the channel 2 reproduction amplifier 140.

On the other hand, when the user inputs the reproduction key through the key input unit 160 to reproduce the signal recorded on the tape, the controller 150 turns off the second switch 121 and the third switch 141, while The first switch 101 is turned on.

Accordingly, the reproduction signals of the channels 1 and 2 read from the tape by the channel 1 head 110 and the channel 2 head 130 are applied to the channel 1 amplifier 120 and the channel 2 amplifier 140 and amplified to a predetermined level. The reproduced signals ch1_out and ch2_out are output.

However, in this case, when the signal is recorded on the tape, the signals of channel 1 and channel 2 to be recorded through one amplifier are simultaneously applied to the heads of the channel 1 and the channel 2, thereby causing crosstalk between the two channels. This causes the signal to noise ratio to deteriorate.

This causes a problem that the signal recorded on the tape is not recorded faithfully and the degraded signal is reproduced during subsequent reproduction.

Therefore, the present invention, in view of the conventional problems, when recording the signal of the channel 1 and channel 2 on the tape, the input channel signal is separated by each of the two amplifiers through the amplifier and then separated and amplified angle It is an object of the present invention to provide a digital VRL recording / reproducing apparatus that can reduce cross talk between channels by independently applying channel signals to channel 1 and channel 2 heads.

1 is a block diagram of a conventional digital VR recording / reproducing apparatus.

2 is a block diagram of a recording / reproducing apparatus of the present invention Digital VR.

<Explanation of symbols for the main parts of the drawings>

200: channel 1 recording / playback unit 201: recording amplifier

202,203 switch 204: regenerative amplifier

210: Channel 1 head 220: Channel 2 recording / playback section

221: recording amplifier 222,223: switch

224: playback amplifier 230: channel 2 head

240 control unit 250 key input unit

In the present invention, the recording / reproducing apparatus of the digital VLC has the purpose of receiving the input signal ch1_in of the channel 1, amplifying it to a predetermined level, and then controlling the channel under the control of the controller 240, as shown in FIG. The channel 1 recording / reproducing unit 200 records on the tape through the first head 210 and amplifies the signal read by the channel 1 head 210 under the control of the controller 240 and then outputs (ch1_out). ; The input signal ch2_in of the channel 2 is received and amplified to a predetermined level, and then recorded on a tape through the channel 2 head 230 under the control of the controller 240, and the signal read by the channel 2 head 230. A channel 2 recording / reproducing unit 220 for amplifying and outputting (ch2_out) the signal according to the control of the controller 240; And a control unit 240 for controlling whether the channel 1 recording / reproducing unit 200 and the channel 2 recording / reproducing unit 220 record and reproduce the same.

The channel 1 recording and reproducing unit 200 includes: a recording amplifier 201 for amplifying the input signal ch1_in of the channel 1 to a predetermined level; A first switch 202 for determining whether to apply the signal amplified by the write amplifier 201 to the channel 1 head 210 under the control of the controller 240; A channel 1 reproducing amplifier 204 for receiving the reproducing signal of the channel 1 read from the channel 1 head 210 and amplifying and outputting a predetermined level (ch1_out); The second switch 203 determines whether the reproduction signal read by the channel 1 head 210 is applied to the channel 1 reproduction amplifier 204 under the control of the controller 240.

The channel 2 recording and reproducing unit 220 includes: a recording amplifier 221 for amplifying the input signal ch2_in of the channel 2 to a predetermined level; A first switch 222 determining whether to apply the signal amplified by the write amplifier 221 to the channel 2 head 230 under the control of the controller 240; A channel 2 reproduction amplifier 224 which receives the reproduction signal of the channel 2 read from the channel 2 head 230 and amplifies and outputs a predetermined level (ch2_out); The second switch 223 determines whether to apply the reproduction signal read by the channel 2 head 230 to the channel 2 reproduction amplifier 224 under the control of the controller 240.

The present invention configured as described above will be described in detail with reference to FIG. 2.

First, in the case of reproducing, when the user inputs a reproducing key through the key input unit 250, the control unit 240 controls the second switch 203 and the channel 2 recording / reproducing unit of the channel 1 recording / reproducing unit 200. The second switch 223 of 220 is turned off, while the first switches 202 and 222 are turned on.

As a result, the reproduction signal read by the channel 1 head 210 is amplified to a predetermined level through the reproduction amplifier 204 and then output (ch1_out), and the reproduction signal read by the channel 2 head 230 is the reproduction amplifier 224. Amplified to a predetermined level through the &lt; RTI ID = 0.0 &gt;

On the other hand, when recording, when the user inputs the recording key through the key input unit 250, the control unit 240 is the second switch 203 of the channel 1 recording / playback unit 200 and the channel 2 recording / playback unit ( The second switch 223 of 220 is turned on, while the first switches 202 and 222 are alternately turned on / off.

In other words, the recording signal is applied to only one of the channel 1 head 210 and the channel 2 head 230 which is currently in contact with the tape.

Therefore, when the first switch 202 of the channel 1 recording / reproducing unit 200 is turned on and the first switch 222 of the channel 2 recording / reproducing unit 220 is turned off, the channel 1 input signal ch1_in is recorded. Amplified by amplifier 201 and then written onto tape via channel 1 head 210.

In addition, when the first switch 222 of the channel 2 recording / reproducing unit 220 is turned on and the first switch 202 of the channel 1 recording / reproducing unit 200 is turned off, the channel 2 input signal ch2_in is recorded. It is amplified by the amplifier 221 and then written onto the tape via the channel 2 head 230.

In this way, the recording / reproducing apparatus of the digital V-seal of the present invention can reduce the cross talk phenomenon with other channels at the time of reproduction by independently applying and recording only the input signal of the channel to the head currently in contact with the tape. There is an effect that can be obtained.

Claims (2)

The input signal ch1_in of the channel 1 is received and amplified to a predetermined level, and then recorded on a tape through the channel 1 head 210 under the control of the controller 240, and the signal read by the channel 1 head 210. A channel 1 recording / reproducing unit 200 for amplifying and outputting the signal (ch1_out) according to the control of the controller 240; The input signal ch2_in of the channel 2 is received and amplified to a predetermined level, and then recorded on a tape through the channel 2 head 230 under the control of the controller 240, and the signal read by the channel 2 head 230. A channel 2 recording / reproducing unit 220 for amplifying and outputting (ch2_out) the signal according to the control of the controller 240; And a control unit (240) for controlling whether the channel 1 recording / reproducing unit (200) and the channel 2 recording / reproducing unit (220) are recorded or reproduced. The method of claim 1, wherein the channel 1 recording and playback section 200 and the channel 2 recording and playback section 220 Write amplifiers 201 and 221 for amplifying the input signal ch1_in of channel 1 and the input signal ch2_in of channel 2 to a predetermined level; First switches (202, 222) for determining whether the signals amplified by the write amplifiers (201, 221) are applied to the channel 1 head (210) and the second head (230) under the control of the controller (240); The channel 1 reproduction amplifier 204 and the channel 2 reproduction which receive the reproduction signals of the channel 1 and the channel 2 read from the channel 1 head 210 and the second head 230 and output amplified by a predetermined level (ch1_out and ch2_out). Amplifier 224; The controller 240 determines whether to apply the reproduction signal read by the channel 1 head 210 and the channel 2 head 230 to the channel 1 reproduction amplifier 204 and the channel 2 reproduction amplifier 224. And a recording / reproducing apparatus of a digital VR, comprising a second switch (203, 223).