KR910000643B1 - Cubic video cassette recoder apparatus - Google Patents

Abstract

The recoder for recording and reproducing stero image signal from guard band appearing at LP mode had a drum head comprising A,B head (6,7) for LP and EP, a C head for balancing with a -head, and a D head for recording and reproducing signals from guard band. The D-head is placed alpha apart from the A head. The recoder has a switch for selecting normal recording by A and B head and stero recording utilizing the D-head.

Description

Stereo Video Cassette Recorder (VCR) Device

1A is a circuit diagram of an apparatus of the present invention.

(b) is a block diagram of a rotating head in the apparatus of the present invention.

2a to d are views for explaining the operation of the apparatus of the present invention.

3a to o are signal waveform diagrams in the apparatus of the present invention.

4A and 4B are views for explaining the operation of a general VCR.

5a to c is a three-dimensional screen configuration principle.

* Explanation of symbols for main parts of the drawings

1: Rotating Head 2: A, B Head Amplifier

3,4: luminance and color signal processor 5: mixer

6,7: LP or EP head 8: D head

9: luminance color signal separator 10,11: analog / digital converter

12: memory 13: sync separator

14: decryption / recording control unit 15: delay

16 keyboard 17 central processing unit

18,19: digital-to-analog converter 20: first summer

21: second summer 22: D head amplifier

23,24: chromaticity and luminance processor 25: summer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic video cassette recorder (VCR) device, and more particularly, to a stereoscopic video signal on a guard band on a video tape, which is provided with a D head in a rotating head having A and B heads and a long time recording of a VCR. It relates to a stereoscopic VCR device capable of recording and playing back.

In general, the VCR installs the heads A and B at a 180 ° symmetrical position on the rotating head 50 as shown in FIG. 4A, and records video signals on the video tape 51 as shown in FIG. 4B. The video recording mode of the camera may be divided into a standard mode (SP), a long time mode (LP), and an extended mode (EP). For example, in the standard mode (SP), approximately one field is recorded on the video tape 51. A track width of 58 μm is required.

In the long mode (LP), a track width of 29 μm is required to record one field, and in the extended mode (EP), a track width of 19.33 μm is required to record one field. The mode enables recording and playback for three times the time of the SP mode. Therefore, when the SP mode is recorded with the LP or EP mode head, a portion of the guard band 100 'as shown in FIG. 4B is generated.

In addition, the three-dimensional screen member is described with reference to FIGS. 5a and b. When a person sees an object, the three-dimensional screen member can feel three-dimensionally because there is a visual difference between the two eyes. I feel a three-dimensional impression.

Therefore, as shown in FIG. 5A, an object visible only to the right eye RE is displayed at the position R on the screen 53, and an object only visible to the left eye LE is positioned on the screen 53. (L) makes it feel as if the object is at the point (P) where the extension lines of both eyes (RE, LE) and the object display position (R, L) meet, so that the object appears to be behind the screen (53). do.

Of course, at this time, the image displayed on the screen can be divided into the left-eye-only image and the right-eye-only image in terms of device.However, the human eye cannot distinguish the left-eye-only image from the right-only image. Since it is a known technique to use the stereoscopic glasses, the left eye-only image and the right eye-only image can be seen using the stereoscopic glasses.

Also, as shown in FIG. 5B, when the right eye dedicated image R 'and the left eye dedicated image L' are staggered on the screen 53, the intersection point P with both eyes RE and LE is located in front of the screen. The person feels as if the object is in front of the screen 53.

Therefore, to form a stereoscopic image, two cameras (RE, LC) corresponding to the right and left eyes are photographed at intervals of the human eye, and the video signals of the two cameras (RC, LC) are simultaneously reproduced and recorded as a VCR. You can enjoy 3D video.

However, in a typical video cassette recorder (VCR), video signals having two fields as one frame from NTSC regular TV standard signals are first, second and third frames. It is necessary to input continuously.

Therefore, as shown in FIG. 5C, in the right video camera RC, the image signals are R ₁ , R ₂ , R ₃ . Signals are generated in sequence, and the left video camera (LC) generates video signals continuously in the order of L ₁ , L ₂ , L _3, etc. In order to feel the stereoscopic sense, R ₁ , L ₂ , R ₃ , L ₄ , R ₅ , L ₆ . Like this, the video field of the shaded part should be played back alternately.

Therefore, the present invention replaces the heads (A, B) of the rotating head with the head for the extended mode (LP) or extended mode (EP), and the head for recording and reproduction of the guard band generated during recording of the rotating head. An object of the present invention is to provide a stereoscopic VCR device in which (D) is eccentrically disposed from the head A by an angle α °, and provided with a dedicated recording and recording unit for the head D. The present invention will be described in detail with reference to the following.

Referring to Figures 1a and b, the apparatus of the present invention is a rotating head (1) having A and B heads symmetrically installed, an amplifier for A and B heads (2), luminance and color signal processors (3, 4) and a mixer ( 5) In the VCR apparatus having a 5), the LP or EP heads 6 and 7 are provided at positions where the A and B heads of the rotary head 1 are mounted, and the predetermined angle ([alpha]) at the A head 6 is provided. The D head 8 is installed at an eccentric position, and the output of the luminance color signal separator 9 from the amplifiers 2 for the A and B heads 6 and 7 is stored in the memory through the analog / digital converters 10 and 11. (12), the luminance output (Y) of the luminance color signal separator (9) is connected to the read / write control unit (14) through the synchronous separator (13), and the output of the read / write control unit (14) is stored in memory ( And a read / write control unit 14 and a switch (SW ₁ ) to the memory 12 through the delay unit 15 and to the output of the central processing unit 17 to which the keyboard 16 is input. ) And memory (1 The output of 2) is summed in the first summer 20 through digital / analog converters 18 and 19 and connected to the input of one side of the second summer 21, and the output of the D head 8 is an amplifier ( 22) and through the luminance and chroma processors 23, 24 and summer 25 to the other input of the second summer 21, the output of the mixer 5 and the output of the second summer 21. a switch (SW _1), but each connection to the stator (ab) of the switch, reference numeral 10 101 is the right side, the left side camera 105 as a configuration to connect the movable element (C) to the output terminal (O) of the (SW ₁₎ is Head switch, 106 is a delay, SW ₂ is a camera signal selection switch.

Referring to the operation of the apparatus of the present invention, first, the order of the video signal to obtain a stereoscopic image is that each field constituting one frame must be composed of a right camera signal and a left camera signal as shown in FIG. 5C. R → L → R → L… As shown in FIG. 1B, when the head for long time (LP, EP) is set to A, B head (6, 7) on the rotary dream (1), and the VCR is recorded in standard (SP) mode, the 4b A trajectory such as a tile is formed on the VCR tape and an empty track 100 'is generated at the same time.

Accordingly, as shown in FIG. 1B, the A, B, and D heads 6, 7, and 8 shown in FIG. 2A are disposed on the VDR tape by providing the D head 8 having a predetermined angle of α between the A head 6 and the B head 7 as shown in FIG. ) Is generated.

In other words, Fig. 2A shows the track structure of the recording state of the present invention as a drum in which the D head is mounted like the existing A and B heads at the time of signal recording.

Thus, in order to be able to see the signals recorded in the track on a stereoscopic picture at the time of reproduction, each of the signals must be reproduced alternately.

Therefore, in FIG. 2C at the time of recording, the field signal corresponding to L ₁ is processed by the memory 12 as R ₁ ′, and L ₂ is processed as it is to be alternately reproduced.

In addition, the L ₂ track signal shown in FIG. 2C is sequentially reproduced with the R ₃ 'track signal shown in FIG. 2D.

In other words, A ₁ and C ₁ , B ₁ and D ₁ , A ₂ and C ₁ , B ₂ and D ₂ . In this case, since the pattern is actually recorded, since there are no C heads, only the trajectories of the A, B, and D heads (A ₁ ... A _n , B ₁ ... B _n , D ₁ ... D _n ) are generated.

In this case, the trajectory pattern is shifted as shown in FIG.

Comparing FIG. 2b to FIG. 2a, the trajectory of the head A (A ₁ ) = the trajectory (R ₁ ), the trajectory of the C head (C ₁ ) = the trajectory (L ₁ ), the trajectory of the B head (B ₁ ) = the trajectory ( R ₂ ), D head trajectory (D ₁ ) = L ₂ . It can be seen that A ₃ = R ₅ , C ₃ = L _{5. For} the present invention, the desired trajectory pattern is R ₁ '→ L ₂ → R ₃ ' → L ₄ → R ₅ '→ L ₆ . Since the information recorded in the trajectory R ₁ in FIG. 2c is reproduced as if the information in the trajectory L ₁ and the trajectory R ₃ are in the trajectory L ₂ , the same as in FIG. You can get a pattern.

Here, the heads A and B, which generate the same trajectory as in FIG. 2b, have an AZIMUTH angle of + 6 ° and -6 ° in the case of the VHS method. In order to prevent the interference between the head B and the head D, a head having an azimuth angle larger than the heads A and B should be selected. In the case of the head C, it is not actually used, so the pseudo head is mounted and rotated to balance the weight of the drum. The A and B heads should be mounted on the 180 ° line and the C and D heads on the 180 ° line, and the angle (α °) between the A and D heads should be calculated in one field. There are two tracks, the B track and the D track, depending on the track width.

Now, the normal at the time of recording rather than three-dimensional in Fig. 1 there and outputted via the output terminal (O) to select the image signal from the right and left cameras (100 101) to the switch (SW ₂₎ signal of the switch (SW ₂₎ to the terminals (a) and the mixer 5 and the luminance and color signal processors 3 and 4 are supplied to the heads 6 and 7, and recorded on the VCR tape.

This operation is compatible with conventional VCRs.

When recording in the stereoscopic mode, a signal input from the right camera 100 is transmitted to the A and B heads 6 and 7 through the mixer 5 and the luminance and color signal processors 3 and 4, and the head switch SW ₂ ) recorded in the tracks A ₁ and B ₁ of the VCR tape according to the operating speed (30 Hz), and the signal input from the left camera 101 is controlled by the mixer 25 and the brightness by the head switch SW ₂ . It is transmitted to the D head 8 through the color signal processors 23 and 24 and the amplifier 22, wherein the operating speed (30 Hz) of the control unit 105 of the head switch SW ₂ is equal to τ (where τ is an angle α °). The track width of C ₁ or D ₁ determined by < RTI ID = 0.0 > T1 < / RTI > is delayed by the delay unit 106 and sequentially written to the tracks D ₁ , D ₂ .

Of course, whether the normal recording or stereoscopic recording is controlled by the central processing unit 17 for system control, compatibility with the existing VCR can be maintained.

In the case of reproduction, first, in the case of reproduction maintaining compatibility with a general VCR, as shown in FIG. 1, the A and B heads 6 and 7 extract the video signal from the VCR tape, and the amplifier 2 and the luminance and chromatic processor 3 4, and the switch SW ₁ is connected to the fixed contact point a through the mixer 5 so that a reproduced video signal is outputted to the output terminal O. At this time, the retarder 106 is not operated and at the same time the head switch. It does not work with (SW ₂ ).

Therefore, the reproduction signals of the A and B heads 6 and 7 are generated in the waveforms as shown in Figs. 3g and h, so as to generate the reproduction signals as in Fig. 3i.

Secondly, in the case of stereoscopic reproduction, the required reproduction track is R ₁ '→ L ₂ → R ₃ ' → L ₄ → R ₅ '→ L ₆ . When the stereoscopically recorded tape is reproduced, the apparatus is switched to the stereoscopic mode, and the signal recorded on the VCR tape is reproduced by the head A (6) by the control unit 105 of the head switch SW ₂ . Signal processing via a low amplifier (2), a luminance and chroma processor (3, 4) and a mixer (5), and then to the memory (12) via a luminance color signal separator (9) and an analog-to-digital converter (10, 11), respectively. I remember.

The digital signal stored in the memory 12 is delayed by τ by the τ delayer 15, and is read out to be read by the second summer 21 through the digital / analog converters 18 and 19 and the first summer 20. It is supplied to one input terminal of).

The signal reproduced by the D head 8 is also supplied to the other input terminal of the second summer 21 through the amplifier 22, the luminance and chroma processors 23, 24, and the summer 25, and the second summer. In (21), the two signals are summed to supply a stereoscopic image signal from the output terminal (O).

That is, the signal reproduced by the A and B heads 6 and 7 is a signal waveform as shown in FIG. 3j through the amplifier 2, the luminance and chroma processors 3 and 4, and the summer 5 to the luminance color signal separator 9. To supply.

Therefore, this signal is separated into a luminance signal and a chroma signal, converted into a digital signal through analog-to-digital converters 10 and 11, and stored in the memory 12.

In addition, the luminance signal is supplied to the synchronous separator 13 to separate the synchronous and the separated synchronous signal is applied to the decoding / recording control unit 14, and the decoding / recording control unit 14 generates a stereoscopic reproduction instruction from the keyboard 16. It is determined whether or not a signal input to the memory 12 is recorded by the control signal in the central processing unit 17. In other words, the digital signals from the analog / digital converters 10 and 11 are immediately stored in the memory 12 by the read / write control unit 14.

The signal stored in the memory 12 in the waveform shown in FIG. 3k is applied by the read / write control unit 14 to the memory 12 in the waveform shown in FIG. ) Reads data by the? Delayer 15 and sums it in the first summer 20 through the digital-to-analog converters 18 and 19 to generate an A 'head output such as 3 m.

In addition, the output of the D head 8 reproduced at the head switching speed delayed by the τ delay unit 106 is output through the amplifier 22, the luminance and chroma signal processors 23 and 24, and the summer 25. Since the same waveform output occurs, A ₁ '→ D ₁ → A ₂ ' → D ₂ → A ₃ '→ D ₃ . For example, since the outputs of the right camera 100 and the left camera 101 are recorded and reproduced on different patterns, stereoscopic images can be reproduced.

As described above, the present invention provides a stereoscopic VCR device that can enjoy a stereoscopic screen as a TV, and at the same time, maintains compatibility with a conventional two-dimensional VCR for video screen.

Claims (1)

LP or EP heads 6 and 7 are installed at positions where the A and B heads of the rotating head 1 are mounted, and the D heads are positioned at a position eccentric from the A head 6 by a predetermined angle (α °). 8), the signals read from the A, B heads 6 and 7 and the D head 8 are respectively the amplifiers 2 and 22, the luminance and color signal processors 3 and 4 and 23 and 24, respectively. And a fixed terminal (a, b) of the switch (SW ₁ ) that is selectively switched in accordance with the control signal of the central processing unit 17 through the mixer (5), (25) of the mixer (5) A luminance color signal separator 9 for separating the output into luminance and color signals, an analog / digital converter 10 and 11 for converting analog output signals from the luminance color signal separator 9 into digital signals, and a keyboard 16 By the decoding / writing control unit 14 which determines whether to decode or record the signal input from the central processing unit 17 to the memory 12 by the stereoscopic reproduction instruction from the unit. A memory 12 for storing data, a synchronous separator 13 for separating a synchronous signal from an output signal of the luminance color signal separator 9, and a decoding for sequentially decoding / writing control of a signal stored in the memory 12 And a delay unit 15 for delaying the digital signal through the recording / recording control unit 14 by a predetermined time (τ), and the digital / analog converters 18 and 19 for converting the digital signal output from the memory 12 into an analog signal. And a three-dimensional image via a first summer 20 for summing the analog outputs of the digital / analog converters 18, 19 and a second summer 21 for summing the outputs from the mixer 25. Video cassette recorder (VCR) device.

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