JPS60153289A - Mode display device of video reproducer - Google Patents

Abstract

PURPOSE:To allow recognition of various modes by outputting different color video signals in accordance with respective modes and displaying their color video signals on a cathode-ray tube. CONSTITUTION:When the power source of a reproducer is turned on, a mode detecting device 11 detects the mode, and control signals 13 and 14 corresponding to the mode are added to a color video signal generator 15 from a display control circuit 12. As a result, the generator 15 outputs a color video signal 19 having color information corresponding to the mode, and if there is no character signal 22, said signal 19 is supplied to a video switch device 21 without further operation. Since a color video signal device 23 is controlled so that it can be selected by a control signal 25 of the device 11 at this time, the signal 23 is outputted as an image output signal 26 and projected on a cathode-ray tube. Thus by watching a cathode-ray tube, it is recognized that the power source is turned on.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a method for loading a disc by inserting a disc case containing a disc-shaped recording medium (hereinafter referred to as a disc) into a playback machine and pulling out only the empty disc case. The present invention relates to a mode display device in a video playback device.

Conventional configuration and its problems In the above-mentioned type of video playback device, there are displays regarding the handling of the disk, that is, the side of the disk (side 1 or 2), the presence or absence of a disk in the player, and whether or not the disk case can be inserted. As a means of displaying such information, there is a method using a light emitting display element such as a light emitting diode. However, this method has a problem in that it requires an additional display element. As another conventional example, a device that generates a pseudo video signal that does not include a vertical synchronization signal is built into the player, and the pseudo video signal is generated in conjunction with the loading of a disc into the player, and the video is reproduced. A system has also been proposed that displays the presence of a disc in the player by displaying an image on the CRT screen, but this method does not generate a pseudo video signal unless the disc is loaded into the player. Before loading the disc, the mode of the player cannot be displayed at all, and even after loading the disc there is no vertical synchronization signal, so
There is a drawback that other video signals such as characters cannot be mixed with the pseudo video signal.

FIG. 1 shows the configuration of such a conventional example, in which a mode detection device IK detects which of the above modes it is in, and an output signal corresponding to each mode is outputted via a display control circuit 2. 1, the mode is displayed by causing one of the indicators 3, 4.5 to emit light. On the other hand, the mode detection device 1 fully detects whether or not a disc is loaded into the playback machine, and the video switch device 6 is controlled by this detection signal, and when the disc is loaded, a pseudo video signal 7f video When the playback operation starts, a reproduced video signal 9 from the disc is supplied as the video output signal 8 to indicate whether or not a disc is loaded.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional problems, and generates a color video signal when the power is turned on to the player, and outputs a color video signal corresponding to the mode of the player even before a disc is loaded. The purpose is to make it possible to mix the signals with other character signals, etc.

Structure of the Invention The present invention includes a mode detection device that detects the operating mode of the player and the mode of the disc, including a mode in which the player is simply powered on, and generates a detection output corresponding to each mode; A color video signal generator that generates a color video signal including a signal, and a detection output corresponding to each mode, the color video signal generator is controlled to output all different color video signals corresponding to each mode. The color video signal is projected onto a cathode ray tube, and the above-mentioned modes are displayed on the cathode ray tube screen.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In FIG. 2, 11 is a mode detection device;
Here, there is a disc playing mode, a mode in which the player is powered on but the disc cannot be inserted, a mode in which the disc can be inserted automatically or by additional operation, and a disc is inserted and its side is 1. 2, and a mode in which an empty case can be inserted (a mode in which the disc can be taken out) can be detected, and different detection outputs are generated depending on the mode. Reference numeral 12 denotes a display control circuit which outputs 2-bit control signals 13 and 14 in accordance with the detection output of the mode detection device 11. However, in FIG. 2, blocks 11 and 12 are shown separately for comparison with FIG. Second control signal 13.14
can be obtained directly. Reference numeral 15 denotes a color video signal generator, which receives a composite synchronization signal 16, a subcarrier signal 17, and a composite blanking signal 18, respectively, and outputs a color video signal 19. Control signal 13 of the display control circuit 12
．． At step 14, the color video signal generator 15 can be controlled, and images of different colors corresponding to each mode are displayed on the cathode ray tube screen. This color video signal 19
becomes one input signal of the video switch device 21 via the mixer 20. This mixer 20 can be supplied with a character signal 22, and can supply a color video signal 23 on which the character signal 22 has been superimposed to the video switch device #21 if necessary. The video switch device 21 inputs a color video signal 23 and a disc playback video signal 24, one of which is selected by a control signal 26 from the mode detection device 11, and the video output signal 26 is a cathode ray tube (
(not shown).

Therefore, in the above configuration, for example, when the player is powered on, the mode detection device 11 detects the mode, and the display control circuit 12 selects the first mode corresponding to the mode. A second control signal 13, 14 is applied to the color video signal generator 15. As a result, the color video signal generator 15 generates a color video signal 1 having color information corresponding to the above mode.
9 is output, and if there is no character signal 22, it is supplied as is to the video switch device 21. At this time, the mode detection device 110 controls the switch device 21 to select the color video signal 23 by the control signal 25, and the color video signal 23 is outputted as a video output signal 26 and displayed on the cathode ray tube screen. Therefore, the operator can recognize that the power is turned on by looking at the cathode ray tube screen.

Next, the color video signal generator 15, which is a feature of the present invention, will be explained using FIG. Figure 3 shows an example of the NTSC system, with a composite synchronization signal 16 and a composite blanking signal 18.
is passed through an EX-OR gate 31 and a pseudo burst flag signal 32 is obtained from its output. On the other hand, by passing the subcarrier signal 17 and the composite blanking signal 18 through the gate 33, the composite blanking signal 18 is output as a subcarrier signal only at H-ray 11, and this subcarrier signal 34 and the composite synchronization signal 16 and a composite luminance signal having an appropriate C level produced from the composite blanking signal 18 are added at a gate 35, and a chroma-added video signal 36 is obtained from the output thereof.

A color video signal 19 is obtained by adding a burst signal to this luminance signal with chroma 36, and in FIG. Switching is performed using second control signals 13 and 14 to create mutually different color information corresponding to each mode. This will be explained below. The subcarrier signal 17 is delayed by 90 degrees by the delay device 37 to obtain a 9o0 delayed subcarrier signal 38 having a phase difference of 90 degrees from the original subcarrier signal 17.

The 900-delayed subcarrier signal 38 and the original subcarrier signal 17 are input to a switch device 39, and the first control signal 13 selects which subcarrier signal to output. The subcarrier signal from this switch device 39 is supplied to an amplifier 4o and an inverting amplifier 41, and the output of each amplifier 40.4'1 is supplied to a second switch device 42. Therefore, with this configuration, it is possible to obtain subcarrier signals having respective phases of 0°, 90°, 180°, and 2700° with respect to the input subcarrier signal 17. In the second switch device 42, one of the subcarrier signals is also selected using the second control signal 14. Therefore, the first. The second control signal 13.14 and the first . The second switch device 39.42 can select any one of the subcarrier signals having the above-mentioned four phases, and this signal and the burst flag signal 32
By obtaining the burst signal 44 from the gate 43 and adding it to the luminance signal with chroma 36 at the gate 46, the color video signal 19 can be output.

Here, the first mode corresponding to each mode described above. With the second control signal 13.14, the first . Second switch device 39.4
2, it is possible to obtain color video signals 19 having mutually different sensuality, and to display them on a cathode ray tube screen. In this example, the following function was created by obtaining four colors: orange, yellow, green, and blue.

Disc not inserted mode ・・・・・・・・・・・・・・・
・Yellow disc side 1 mode ・・・・・・・・
・・・・・・Blue disc side 2 mode ・・・
・・・・・・・・・・・・Green mode in which a disc can be inserted ・・・・・・・・・・・・・・・Orange Also, mode in which an empty disc case can be inserted (mode in which a disc can be removed) ) is the first. By switching the second control signals 13 and 14, blue or green and orange were alternately displayed on the planar screen.

With this configuration, different color video signals are generated according to each mode, and the modes are displayed in different colors and in different display states on the CRT screen, so that it is possible to display not only the mode in which the disc is inserted, but also the power supply. Furthermore, various modes can be displayed on the cathode ray tube screen, such as a mode in which a disc is inserted and no disc is inserted, and a display indicating that a disc can be inserted, which is extremely convenient in practice. Furthermore, since the color video signal includes a synchronization signal, it is possible to display the color video signal in a superimposed manner with other character signals, which is extremely advantageous in practice.

Note that in the above embodiment, the first. 4 at the second switch device
Although subcarrier signals with different types of phase information are created, if there are other modes and you want to display a wider variety of modes, for example, in addition to the above embodiments, you can create subcarrier signals with NTSC system, PAL system, etc. , SECAM, etc., the delay amount of the delay device 37 may be finely controlled by the output control signal of the mode detection device. Furthermore, in the above example, display images corresponding to various modes are obtained by changing the phase of the burst signal, but it is also possible to control the level and phase of the chroma signal, or the level of the burst signal. It is something.

Effects of the Invention As described above, according to the present invention, the color video signal generator is controlled by the detection output corresponding to each mode of the mode detection device, and different color video signals are outputted according to each mode. By displaying the color video signal on a cathode ray tube, various modes can be easily recognized. Fortunately, since the color video signal has a synchronization signal, it can be superimposed with other text signals, etc., making it extremely effective in practical applications.

[Brief explanation of the drawing]

The first tooth is a circuit diagram of a mode display device of a video playback device in a conventional example, FIG. 2 is a block diagram of a mode display device of a video playback device in an embodiment of the present invention, and FIG. 3 is a color code used in the same device. FIG. 2 is a specific circuit diagram of a video signal generator. 11...mode detection device, 12...display control circuit, 13.14...first. Second control signal, 15...Color video signal generator, 16.
... Composite synchronization signal, 17 ... Subcarrier signal, 18 ... Composite blanking signal, 19
... Color video signal, 21 ... Video switch device, 24 ... Playback video signal from the disk, 26 ... Output video signal.

Claims (1)

[Claims] A mode detection device that detects the operating mode of the player, including the mode at the time the player is powered on, and the mode of the disc, and generates a detection output corresponding to each mode, and a color video signal including a synchronization signal. and a control means for controlling the color video signal generator to output mutually different color video signals with detection outputs corresponding to each of the modes, the color video signal generator is provided with a control means for controlling the color video signal generator to output different color video signals from each other using detection outputs corresponding to the respective modes, A mode display device for a video playback device that displays a mode on the screen.