JPH04306091A - Recording device and reproducing device - Google Patents

Abstract

PURPOSE:To realize the recording device able to recording video software sources having various aspect ratios. CONSTITUTION:The device is provided with an anamorphic lens 1 varying an aspect ratio of a screen optically and an optical image obtained by the above lens 1 is converted into an electric signal by using a conventional image pickup system 3 to obtain a video signal. A code table 5 to discriminate a compression ratio of the lens 1 is read by a sensor 6, an ID generator 7 generates an ID signal relating to the compression ratio and an adder 4 is used to record the compressed video signal and the above ID signal multiplexingly.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording or reproducing horizontally compressed image signals.

0002

2. Description of the Related Art For example, an original image subjected to linear time axis compression in the horizontal direction is recorded on a recording/reproducing device such as a VTR, and the reproduced output image signal is printed on a display means such as a CRT monitor, a projector, or a video printer. When the recorded image signal is input to the means as it is, a displayed image or a print image output with distortion in the horizontal direction is obtained.

[0003] Therefore, in the above-mentioned compression system, the decompression processing operation of the display or print means is manually switched each time depending on the compression ratio of the image signal during playback.

In addition, there is a VTR recording package (for example, VH
A detection hole for expansion processing was provided in the cassette (S cassette), and the system detected when the cassette was installed and automatically switched it on the playback machine.

[0005]

[Problems to be Solved by the Invention] However, in the above-mentioned recording or reproducing apparatus, it is difficult to exchange video signals between different standards (for example, 8 mm VTR and VHS-VTR).
dubbing), the aspect ratio will not be processed correctly. Further, there is a problem in that image signals that have been compressed at different compression rates depending on a plurality of aspect ratios cannot be identified.

In light of the above-mentioned background, the present invention solves the above-mentioned problems in conventional recording or reproducing devices, and provides a recording or reproducing device that can automatically reproduce video software having various aspect ratios at a proper aspect ratio without any erroneous operation. The purpose is to provide a playback device.

[0007]

[Means for Solving the Problems] A recording apparatus according to the present invention includes a compression means for obtaining a horizontally compressed image signal, a discrimination means for discriminating a compression ratio, and an output from the discrimination means according to the compression ratio. The present invention is characterized by comprising an identification signal generating means for generating an identification signal, and a signal multiplexing means for superimposing the compression ratio identification signal on the image signal.

[0008] The reproducing apparatus also reproduces an image signal from a recording medium on which a compression rate identification signal relating to the compression rate is recorded together with the horizontally compressed image signal,
Separating means for separating the image signal and the identification signal;
The image processing apparatus is characterized in that it includes a decompression processing means for performing decompression processing on the image signal according to the identification signal.

[0009]

[Operation] According to the recording device and the reproducing device of the present invention, there is provided a compression means for obtaining an image signal compressed in the horizontal direction, a discriminating means for discriminating the compression ratio, and an identification signal related to the compression ratio outputted by the discriminating means. a signal multiplexing means for superimposing the compression ratio identification signal on the image signal; a separation means for separating the multiplexed image signal and the identification signal; By including a decompression processing means that performs decompression processing on the image signal according to the signal, video software having various aspect ratios can be recorded and further automatically reproduced with an appropriate aspect ratio.

0010

[Example] A first example according to the present invention will be described below with reference to FIGS.
This will be explained in detail using 5.

FIG. 1 is a block diagram of a compression ratio identification signal generating device according to this embodiment, FIG. 2 is a block diagram of a reproduction system according to this embodiment, and FIG. 3 is a diagram related to image signal expansion according to this embodiment. FIG. 4 is a diagram showing an example of signal multiplexing according to the embodiment, and FIG. 5 is a diagram showing aspect ratios for different movie formats.

In FIG. 1, 1 is a linear compression optical system (anamorphic lens), 2 is a normal imaging optical system, 3 is a normal imaging system (video camera), 4 is an adder, and 5 is a compression unit for the anamorphic lens 2. Code table for identifying rates, 6
7 is a sensor that reads the code table, and 7 is an ID generator that generates the detection result by the sensor 6 as a compression ratio identification signal (ID signal).

[0013] To explain the compression rate code table detection operation,
The code table 5 in FIG. 1 consists of 3 bits b0, b1, and b2, and the discrimination method is an optical reflection type, and the sensor 6 is 1 if there is reflected light and 0 if there is no reflected light. Therefore, code table 5 in Figure 1
are detected as 0, 1, and 0 in order.

[0014] Figure 5 shows the aspect ratio of each movie format.
4 is ID signal 000, 3:5 is ID signal 001, 9:1
6 is ID signal 010, 9:20 is ID signal 011, 9:
21 is assigned an ID signal of 100, the lens used in Figure 1 can change the image with an aspect ratio of 9:16 shown in Figure 5(c) to an aspect ratio of 3:4, that is, the image actually taken. It is determined that an anamorphic lens that compresses horizontally by 3/4 is used.

For example, when the lens 1 is not attached, it can be determined that there is no compression due to all zeros with no reflection.

The ID signal generator 7 receives such a detection result and converts it into a signal form that can be superimposed on the video signal, and the adder 4 multiplexes the compressed video signal and the ID signal.

An example of signal superposition is shown in FIG.

In FIG. 2, the ID signal is inserted as digital data into the vertical blanking section of the video signal at the 11th H for odd fields and the 274th H for even fields.

[0019] In this vertical blanking section, the first
4, 15, 16, 21, 227, 278, 279, 28
4H is the data superimposition section for teletext broadcasting, and the 18th and 2nd
81H is GCR data for ghost removal. In addition, a large amount of data is superimposed on the 10th to 21H and 273rd to 284H signal superimposition possible periods depending on the purpose.

The reproduction system will be explained using FIG. 2.

In FIG. 2, 11 is an ID signal separation circuit;
12 is a video display system, 13 is an ID identification circuit, and 14 is an expansion control means.

Next, the operation will be explained. As explained above, the ID signal of the compression ratio information is superimposed and recorded in the vertical blanking section. Therefore, the ID signal separation circuit 1
1 separates the video signal and the ID signal, an ID identification circuit 13 detects the compression rate, derives the expansion rate from the compression rate, and expands the video display means 12 so as to vary the horizontal expansion rate. The control means 14 switches the expansion ratio.

Next, the present embodiment of decompression control will be explained using FIG.

The components shown in FIG. 3(a) are electrically expanded, and 31 is an A/D converter, 32 is a digital signal processing circuit (DSP), 33 is a D/A converter, and 34 is an image an X-Y control section for controlling the X-Y ratio of 3;
5 is a CRT monitor.

The decompression control operation in the apparatus having the above configuration will be explained.

A digital signal processing circuit (DSP) 32 converts the digitized compressed video signal from the A/D converter 31 into an X-Y ratio of reduced screen processing using the compression information identified by the ID signal identification circuit 13. By setting appropriately, it can be stretched relatively horizontally. After this processing, the D/A converter 33 displays the signal on the CRT monitor 35 as an analog wide video signal.

In addition to this, electrical expansion can also be achieved by directly controlling the CRT scan.

The one shown in FIG. 3(b) is one that is optically expanded; 36 is a projector; 37 is a rotary plate provided with anamorphic lenses each having a different expansion rate;
8 is a gear, 39 is a motor for rotating the rotary plate 37 via the gear 38, 40 is a driver that controls the motor 39, and 41 to 44 are aspect ratios of images projected when each lens is reproduced. A code table 45 is a sensor for reading the code table.

The decompression control operation in the apparatus having the above configuration will be explained.

The output signal of the ID identification circuit 13 is input to the driver 40, and the driver 40 drives the motor 39, rotates the rotary plate 37, and reads the code tables 41 to 44 of each lens with the sensor 45 and outputs the output. If the ID signal inputted to the driver 40 matches the ID signal obtained by the ID identification circuit 13 in FIG. 3, the driver 40 stops driving the motor 39 and reproduces the recorded image.

A second embodiment of the present invention will be described in detail below with reference to FIGS. 6 and 7.

In the second embodiment, the present invention is applied to conversion from a silver-salt type motion picture film called telecine to a TV signal.

FIG. 6 is a block diagram of a recording system to which telecine is applied to the present invention, and FIG. 7 is a diagram showing the data structure of PCM audio processing.

In FIG. 6, 100 is a film, 101
1 is a telecine conversion section, 103 is an ID signal (compressed information signal, etc.) generation section, 104 is a PCM processing section of the VTR section, 105 is an FM audio processing circuit, 106 is a signal processing circuit section, 1
07 is an electromagnetic converter, 108 is a sensor, 109 is an audio signal processing circuit for film, and 110 is a VTR tape.

Recording and reproducing operations in the apparatus having the above configuration will be explained.

The film 100 is shown in FIG. 5 depending on the aspect ratio.
There are five typical types as shown in . Of these, T
For V signals, the aspect ratio of NTSC, PAL, and SECAM is 3:4 using the Academy Aperture (ID=0) shown in Figure 5.
00), and corresponds to the high-definition (HD-T) proposed by NHK.
V)'s aspect ratio of 9:16 corresponds to a 35mm American standard widescreen (ID=010).

First, select which film of these different standards is to be used as the video source, and then select the aspect ratio setting means 1.
At step 02, the information is transmitted to the telecine converter 101 and the ID generator 103.

In response to this, the telecine 101 electronically or optically sets the horizontal compression ratio, and outputs the signal to the VTR section as a TV signal equivalent to 3:4.

The film 100 includes a Movie video section,
There is an audio signal recording section next to it as an audio track, and this audio information is detected by a sensor 108, and an audio signal processing circuit 109 performs noise removal, dynamic range companding, etc., and outputs it as a normal audio signal to the VTR section. Output.

The data structure of the PCM process has a Sub data area in which sub information can be stored, as shown in FIG. Compressed information output from the ID generator 103 is written into the Sub data.

In this way, the compressed video signal, the PCM audio signal multiplexed with information related to the compression, and the unmultiplexed analog audio signal are transferred to the VTR tape by the electromagnetic conversion system (E→M system) 107 of the VTR section. 108.

[0042] The movie package software 108 is produced by the above-described flow.

At the time of reproduction, the ID signal is extracted from the PCM audio reproduction circuit, and an expanded image can be reproduced using the same configuration of the reproduction apparatus as in the first embodiment.

[0044]

As explained above, according to the recording device and the reproducing device of the present invention, there is provided a compression means for obtaining an image signal compressed in the horizontal direction, a determination means for determining the compression ratio, and an output from the determination means. an identification signal generating means for generating an identification signal relating to a compression ratio, a signal multiplexing means for superimposing the compression ratio identification signal on the image signal, and separating the multiplexed image signal and the identification signal. By having a separation means for performing an expansion process on the image signal according to the identification signal, it is possible to record video software having various aspect ratios, and furthermore, it is possible to record video software having various aspect ratios, and furthermore, it is possible to record video software having various aspect ratios, and furthermore, it is possible to record video software having various aspect ratios. Since it can be reproduced, it has the great effect of being as easy to operate as conventional video equipment.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a compression ratio identification signal generation device according to an embodiment.

FIG. 2 is a configuration diagram of a reproduction system according to this embodiment.

FIG. 3 is a configuration diagram of an image signal decompression device according to the present embodiment.

FIG. 4 is a diagram showing signal multiplexing according to this embodiment.

FIG. 5 is a diagram showing aspect ratios of different movie formats.

FIG. 6 is a configuration diagram of a recording system to which telecine is applied to the present invention.

FIG. 7 is a diagram showing a data structure of PCM audio processing.

[Explanation of symbols]

1. Anamorphic lens 5 Code table 6 Sensor 7 ID generator 11 ID separation circuit 12 Video display means 13 ID identification circuit 14 Expansion control means

Claims (3)

[Claims] 1. Compressing means for obtaining an image signal compressed in the horizontal direction; discriminating means for discriminating a compression ratio; identification signal generating means for generating an output from the discriminating means as an identification signal relating to the compression ratio; A recording apparatus comprising: signal multiplexing means for superimposing a compression rate identification signal on the image signal. 2. The compression means includes an optical section that compresses an image in a horizontal direction, and a photoelectric conversion section that converts an optical image of the image obtained by the optical section into an electrical signal. The recording device according to claim 1. 3. An apparatus for reproducing an image signal from a recording medium in which a compression rate identification signal related to a compression rate is recorded together with an image signal compressed in the horizontal direction, the apparatus separating the image signal and the identification signal. A playback device comprising: a separation means; and an expansion processing means for applying expansion processing to the image signal in accordance with the identification signal.