JPH05211667A - Magnetic recording/reproducing device for video signal of wide aspect ratio - Google Patents

Abstract

(57) [Summary] [Purpose] To record and reproduce wide aspect ratio video signals as they are, and enable viewing in a normal aspect ratio as a zoom mode on an NTSC monitor with an aspect ratio of 4: 3. [Structure] A video signal processing circuit 2, a recording amplifier 3, a magnetic head 4, a reproducing amplifier 10, and a video signal processing circuit 11 for recording and reproducing a wide aspect ratio video signal as they are are provided, and an aspect ratio is set on a control track of a magnetic tape 5. A CTL pulse recording / reproducing circuit 7 for recording / reproducing the information of (4) and a time expanding circuit 12 (4/3) for horizontally expanding the video signal are provided to display an NTSC zoom mode screen with an aspect ratio of 4: 3. It is configured so that it can be converted into and output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus for recording and reproducing a wide aspect ratio video signal on a magnetic tape.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a configuration of a conventional magnetic recording / reproducing apparatus for recording / reproducing a wide aspect ratio video signal having an aspect ratio of 16: 9 defined by the VHS standard. In the figure, 1 is a wide aspect video signal input terminal, 2 is a video signal recording processing circuit for recording the input video signal, 3 is a recording amplifier, and 4 is video signal information recorded and reproduced on a video track of a magnetic tape 5. Rotary magnetic head, 6 is a 16: 9 video recording information input terminal which is aspect ratio information of an input video signal, 7 is a CTL pulse recording / reproducing circuit for recording / reproducing aspect ratio information, and 8 is a magnetic CTL pulse. It is a control head for recording and reproducing on the control track of the tape 5.

Reference numeral 9 is a switch circuit for switching between a recorded video signal (hereinafter referred to as EE) and a reproduced video signal (hereinafter referred to as PB), 10 is a reproduction amplifier of the reproduced video signal read from the magnetic tape 5, and 11 is a reproduction amplifier. A video signal reproduction processing circuit for converting a reproduction video signal into a video signal, 15 is a 16: 9 video recording information output terminal for recording and reproducing aspect ratio information, and 30 is a monitor output terminal for outputting a video signal.

FIG. 6 (a) is a diagram showing the arrangement of control signal data when the 16: 9 aspect ratio information of the video signal is recorded on the control track of the magnetic tape 5 of FIG.

Next, the operation of the above configuration will be described.
During recording, a video signal having an aspect ratio of 16: 9 enters the wide aspect video signal input terminal 1, and the video signal recording processing circuit 2 and EE for recording the input video signal.
Is supplied to the switch circuit 9 for switching between PB and PB, and the monitor signal is output from the monitor output terminal 30 at the same time as the recording signal processing, while the output of the video signal recording processing circuit 2 is amplified by the recording amplifier 3 and then rotated. It is recorded on the video track of the magnetic tape 5 by the magnetic head 4.

On the other hand, the aspect ratio information of the input video signal input from the 16: 9 video recording information input terminal 6 is CTL.
After being converted into control pulses by the pulse recording / reproducing circuit 7, the magnetic tape 5 is converted by the control head 8.
Will be recorded on the control track.

During reproduction, the video signal read from the magnetic tape 5 by the rotary magnetic head 4 is reproduced by the reproduction amplifier 1.
0, the video signal reproduction processing circuit 11 converts the video signal into a reproduction video signal, and the monitor output terminal 3 through the switch 9.
It is output from 0.

At this time, the control head 8 reproduces the aspect ratio information of the video signal recorded on the control track of the magnetic tape 5, and the CTL pulse recording / reproducing circuit 7 reproduces the aspect ratio information of the video signal at 16: 9. The video is output from the video recording information output terminal 15, and the monitor is subjected to 16: 9 wide aspect signal processing.

[0009]

Since the conventional magnetic recording / reproducing apparatus for a wide aspect ratio video signal is configured as described above, the monitor apparatus is limited to an apparatus capable of monitoring a video signal having an aspect ratio of 16: 9. , General standard NTS
The C signal monitor device has a problem that it cannot be monitored with a normal aspect ratio.

The present invention has been made in order to solve the above-mentioned problems, and can be applied not only to a wide aspect ratio monitor device but also to a standard N video signal for a wide aspect ratio video signal.
An object of the present invention is to provide a magnetic recording / reproducing apparatus for a wide aspect ratio video signal which can be monitored even in a TSC signal monitor apparatus.

[0011]

According to a first aspect of the present invention, there is provided a magnetic recording / reproducing apparatus for a wide aspect ratio video signal.
Wide aspect ratio video recording means for recording the video signal input from the video signal input terminal on the video track of the magnetic tape, and the aspect ratio identification information of the video input from the aspect ratio information input terminal for controlling the magnetic tape. Means for recording on a track, means for reproducing a video signal recorded on the video track, means for reproducing identification information of an aspect ratio of an image recorded on the control track, and And a means for converting the reproduced video signal into a standard NTSC signal by enlarging the central part except the vicinity of the left and right edges on the screen.

According to a second aspect of the present invention, there is provided a magnetic recording / reproducing apparatus for a wide aspect ratio video signal, in addition to the structure of the first aspect, means for outputting a standard NTSC signal, and the wide aspect ratio video signal. And a means for simultaneously outputting the wide aspect ratio recording information from the aspect ratio information output terminal.

Further, when the aspect ratio of the wide aspect ratio video signal is 16: 9, two S pulses and two L pulses of the control signal recorded on the control track are alternately continuous, and other wide aspect ratios are used. In this case, it is preferable that three S-pulses and three L-pulses of the control signal recorded on the control track are alternately continuous.

[0014]

According to the present invention, the video signal of the wide aspect ratio video signal is recorded as it is on the video track of the magnetic tape, and the identification information of the aspect ratio of the input video is recorded on the control track of the magnetic tape. It Then, during reproduction, the video signal reproduced from the video track is expanded according to the aspect ratio information of the video signal reproduced from the control track so that the horizontal direction of the screen has a normal aspect ratio.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. Example 1. 1 is a block diagram showing the configuration of a magnetic recording / reproducing apparatus for a wide aspect ratio video signal according to an embodiment of the present invention. In FIG. 1, the same or corresponding portions as those of the conventional example shown in FIG. Reference numerals are given and detailed description thereof is omitted.

In FIG. 1, numeral 12 expands the reproduced video signal so that the horizontal direction of the screen has a normal aspect ratio (4 /
3) Time expansion circuit, 13 is a 16: 9 monitor output terminal for wide aspect ratio video signals, and 14 is a 4: 3 monitor output terminal for standard NTSC signals.

FIG. 2 is a block diagram showing an example of the configuration of the (4/3) time extension circuit 12 shown in FIG. 1. In FIG. 2, 16 is an input of the (4/3) time extension circuit 12. Three
/ 4 horizontal direction compressed video signal input terminal, 17 is an A / D converter for converting the input signal into digital data, 18 is a sync signal separation circuit for extracting a sync signal from the input signal, and 19 is a chroma burst sync Fsc as a reference clock. Input terminal,
20 is a 4 × multiplier for producing 4Fsc, and 21 is 4Fs
The c-clock ⅓ frequency divider and 22 are (4/3) Fsc quadruplers.

A memory write clock gate circuit 23 gates a clock for writing the data converted into digital data by the A / D converter 17 into the memory. Reference numeral 24 is a 1H dual-port memory for storing one line of data, and 25 is a memory reading clock gate circuit, which gates a clock for reading data from the 1H dual-port memory 24. 26 is 1
A D / A converter for converting the data read from the H dual port memory 24 into an analog signal, 27 is a 1H delay circuit for the synchronization signal, and 28 is an analog signal converted by the D / A converter 26. A sync signal adding circuit for applying a sync signal, and 29 is a (4/3) horizontally expanded video signal output terminal subjected to time expansion processing.

FIG. 3 shows a waveform in the process of expanding the signal in the block diagram of the (4/3) time expansion circuit 12 shown in FIG. 2, and (a) is a (3/4) lateral compression video signal. Input waveform, (b) is 1H dual port memory 24
A clock waveform gated by a memory write clock gate circuit 23 for writing data to
(C) is a clock waveform gated by the memory read clock gate circuit 25 for reading data from the 1H dual-port memory 24, and (d) is the 1H dual-port memory 24 according to the clock (b).
(E) is data read from the 1H dual port memory 24 by the clock of (c) above, and (f) is a signal obtained by D / A converting the above data (e) and adding a synchronization signal. Is.

FIG. 4 shows a monitor screen. (A) is a screen when a video signal having an aspect ratio of 16: 9 is viewed on a monitor having an aspect ratio of 16: 9, and (b) is an aspect ratio of 16: 9.
Screen image when viewed on a standard NTSC monitor with an aspect ratio of 4: 3 in zoom mode, (c) shows an image signal with an aspect ratio of 16: 9 and NTS with an aspect ratio of 4: 3.
This is the screen when viewed on the C standard monitor.

FIG. 6 is a diagram showing the arrangement of the data of the control signal of the control track in which the aspect ratio information is recorded. (A) shows the case where a video signal having an aspect ratio of 16: 9 is recorded, (b). Indicates a case where a video signal with a wide aspect ratio other than the above is recorded.

Next, the operation of the above configuration will be described.
At the time of recording, the video input signal of the waveform shown in FIG. 4A input from the wide aspect video signal input terminal 1 is E
A wide aspect video signal is output from the 16: 9 monitor output terminal 13 through the E / PB switch circuit 9, and at the same time, supplied to the video signal recording processing circuit 2.
The video signal is recorded on the video track of the magnetic tape 5 by the rotary magnetic head 4 through the recording amplifier 3.

At this time, the wide aspect ratio information input from the 16: 9 video recording information input terminal 6 is CTL.
After passing through the pulse recording / reproducing circuit 7, the control head 8 records the information on the aspect ratio of the video signal on the control track of the magnetic tape 5.

On the other hand, during reproduction, the rotary magnetic head 4
The video signal read from the video track of the magnetic tape 5 is converted into a reproduction video signal by the reproduction amplifier 10 and the video signal reproduction processing circuit 11, and the wide aspect ratio video signal recorded through the changeover switch 9 is (4 / 3) It is input to the time expansion circuit 12, converted into a standard NTSC signal, and output from the 4: 3 monitor output terminal 14.

At this time, the information of the aspect ratio of the video signal recorded on the control track of the magnetic tape 5 is reproduced from the control head 8 through the CTL pulse recording / reproducing circuit 7, and the time (4/3) in FIG. The decompression circuit converts the wide aspect (3/4) laterally compressed video signal into a zoom mode standard NTSC signal.

In the conversion operation, the video signal having the wide aspect ratio input to the (3/4) horizontal compression video signal input terminal 16 is converted into digital data by the A / D converter 17, and at the same time, the synchronization is performed. While the horizontal and vertical synchronizing signals of the video signal are taken out by the signal separating circuit 18,
The reference clock is input from the chroma burst synchronization Fsc input terminal 19 and is multiplied by 4.
It becomes a (4/3) Fsc clock signal through a (1/3) frequency divider 21 for (1/3) frequency division, and a (16/3) Fs frequency signal through a (4/3) Fsc clock 22 for further quadrupling.
c clock signal.

The (16/3) Fsc clock signal is
A wide aspect ratio video signal used as a clock signal of the A / D converter 17 and input to the (3/4) lateral compression video signal input terminal 16 shown in FIG. The memory write clock gate circuit 23 supplies the 1H dual-port memory 24 with the range limited to that shown in FIG.
The data shown in (d) is written in the 1H dual port memory 24.

The (4/3) Fsc clock signal is limited to the range shown in FIG. 3C by the memory read clock gate circuit 25 and supplied to the 1H dual port memory 24. (1) The data delayed by 1H is read from the 1H dual-port memory 24, and at the same time, is used as a clock signal for the D / A converter 26.

The sync signal delayed by the 1H delay circuit 27 is added to the analog signal converted by the D / A converter 26 by the sync signal adding circuit 28, as shown in FIG.
It is converted into the zoom mode standard NTSC video signal shown in (f) and output from the (4/3) laterally expanded video signal terminal 29.

Example 2. The configuration of this embodiment is the same as that of FIG. The operation different from that will be described below.

The video input signal of the waveform shown in FIG. 4 (a) input from the wide aspect video signal input terminal 1 at the time of recording passes through the EE / PB changeover switch circuit 9 and the wide aspect video signal is output to the 16: 9 monitor. At the same time as being output from the terminal 13, the aspect ratio information of the video signal is output from the 16: 9 video recording information output terminal 15 to set the monitor to the 16: 9 wide aspect signal processing mode. Video signal recording processing circuit 2
And is recorded on the video track of the magnetic tape 5 by the rotary magnetic head 4 through the recording amplifier 3 of the video signal.

At this time, the wide aspect ratio information input from the 16: 9 video recording information input terminal 6 is CT.
The information is recorded as the aspect ratio information of the video signal on the control track of the magnetic tape 5 by the control head 8 through the L pulse recording / reproducing circuit 7.

On the other hand, during reproduction, the rotary magnetic head 4
The video signal read from the video track of the magnetic tape 5 is converted into a reproduction video signal by the reproduction amplifier 10 and the video signal reproduction processing circuit 11, and the wide aspect ratio video signal recorded through the changeover switch 9 is (4 / 3) It is input to the time expansion circuit 12 and converted into a standard NTSC signal, and the 4: 3 monitor output terminal 14
At the same time, the wide aspect video signal is output from the 16: 9 monitor output terminal 13.

At this time, the information of the aspect ratio of the video signal recorded on the control track of the magnetic tape 5 is reproduced by the control head 8 through the CTL pulse recording / reproducing circuit 7, and the information of the aspect ratio of the video signal is 16 : 9 Outputs from the video recording information output terminal 15 and puts the monitor in the 16: 9 wide aspect signal processing mode.

Example 3. In this embodiment, when the aspect ratio of the video signal input from the wide aspect video signal input terminal 1 is 16: 9, the control signal recorded on the control track as shown in the VHS standard is shown in FIG. As shown in, when two L pulses and two S pulses are alternately consecutive and other wide aspect ratios, such as an aspect ratio of 5: 3, the control signal recorded on the control track is As shown in FIG. 6 (b), recording is performed so that three L pulses and three S pulses are alternately continuous.

[0036]

As described above, according to the first and second aspects of the present invention, the video signal having the wide aspect ratio is directly recorded and reproduced, and the aspect ratio information of the recorded video signal is recorded and reproduced on the control track. Since it is configured to, the monitor can be set to the wide aspect ratio mode by the aspect ratio information and the screen of the normal aspect ratio can be monitored, and at the same time, the wide aspect ratio video signal is zoomed by the (4/3) time expansion circuit. Mode standard N
Since it is converted to a TSC signal, even an NTSC monitor with an aspect ratio of 4: 3 that does not support wide aspect ratio,
You can see the screen with the normal aspect ratio.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a magnetic recording / reproducing apparatus for a wide aspect ratio video signal according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of a (4/3) time extension circuit in a magnetic recording / reproducing apparatus for a wide aspect ratio video signal according to an embodiment of the present invention.

FIG. 3 is a diagram showing a signal waveform in a (4/3) time extension operation in a magnetic recording / reproducing apparatus for a wide aspect ratio video signal according to an embodiment of the present invention.

FIG. 4 is a screen image of a wide aspect ratio video signal viewed on a monitor having an aspect ratio of 16: 9, a screen viewed on a monitor having an aspect ratio of 4: 3, and a zoom mode when processed according to an embodiment of the present invention. 3 is a diagram showing a screen viewed on a monitor having an aspect ratio of 4: 3.

FIG. 5 is a block diagram showing a configuration of a conventional magnetic recording / reproducing apparatus for a wide aspect ratio video signal.

FIG. 6 is a diagram showing an arrangement of data of 16: 9 aspect ratio information of a video signal recorded on a control track and an arrangement of data of other wide aspect ratio information.

[Explanation of symbols]

 2 video signal recording processing circuit 4 rotating magnetic head 5 magnetic tape 7 CTL pulse recording / reproducing circuit 8 control head 9 EE / PB changeover switch 11 video signal reproducing processing circuit 12 (4/3) time extension circuit 15 16: 9 video recording information Output terminal

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[Procedure amendment]

[Submission date] July 10, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

In the conversion operation, the video signal having the wide aspect ratio input to the (3/4) horizontal compression video signal input terminal 16 is converted into digital data by the A / D converter 17, and at the same time, the synchronization is performed. While the horizontal and vertical synchronizing signals of the video signal are taken out by the signal separating circuit 18,
Serving as a reference clock is input from the chroma burst synchronization Fsc input terminal 19, a 4 multiplier 20 for quadruple
Becomes a 4Fsc clock signal through (1/3)
Through 4 multiplier 22 for (1/3) frequency divider 21, quadrupled to divide, a (16/3) Fsc clock signal.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

The 4 Fsc clock signal is read by the memory read clock gate circuit 25 as shown in FIG.
1H dual port memory 24 limited to the range shown in
1H delayed data supplied to the
At the same time as being read from the H dual port memory 24, it is used as a clock signal for the D / A converter 26.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (3)

[Claims] 1. A video system recording means for recording a video signal input from a wide aspect ratio video signal input terminal on a video track of a magnetic tape, and identification information of an aspect ratio of an image input from an aspect ratio information input terminal. Means for recording on the control track of the magnetic tape, means for reproducing the video signal recorded on the video track, means for reproducing identification information of the aspect ratio of the video recorded on the control track, and the aspect ratio Based on the identification information of the above, the reproduced video signal is expanded to the standard NTSC by enlarging the central part except the left and right edges on the screen.
A magnetic recording / reproducing apparatus for a wide aspect ratio video signal, comprising: a means for converting the signal into a signal. 2. A video system recording means for recording a video signal input from a wide aspect ratio video signal input terminal on a video track of a magnetic tape, and identification information of an aspect ratio of an image input from an aspect ratio information input terminal. Means for recording on the control track of the magnetic tape, means for reproducing the video signal recorded on the video track, means for reproducing identification information of the aspect ratio of the video recorded on the control track, and the aspect ratio Based on the identification information of the above, the reproduced video signal is expanded to the standard NTSC by enlarging the central part except the left and right edges on the screen.
A unit for converting the signal into a signal, a unit for outputting the standard NTSC signal, and a unit for outputting the wide aspect ratio video signal and at the same time outputting wide aspect ratio recording information from an aspect ratio information output terminal. Wide aspect ratio video signal magnetic recording and reproducing device. 3. When the aspect ratio of a wide aspect ratio video signal is 16: 9, two S pulses and two L pulses of the control signal recorded on the control track are alternately consecutive, and other wide aspect ratio 3. A magnetic recording / reproducing apparatus for a wide aspect ratio video signal according to claim 1 or 2, wherein the S pulse and the L pulse of the control signal recorded on the control track are alternately continuous in groups of three.