KR930000451B1 - Recording screen recognizing device and method - Google Patents

Abstract

The apparatus perceives which one of the main and sub screen video in a PIP system, is being recorded by blinking the sub- screen video with a certain period when it is being recorded. It includes a controller (9) for generating the area and border signal of the sub-screen video, the 1st switching section (SW3,SW4) for switching the signal from the controller (9), the 2nd switching section (SW1) for choosing one of the sub and main video, the 3rd switching section (SW2), and a controlling section (11) for controlling the blink of the sub-screen border.

Description

Recording screen recognition device and method

1 is a circuit diagram according to an embodiment of a PIP recording screen recognition apparatus according to the present invention.

2 is a flow chart of the operation of the circuit shown in FIG.

3 is an operation timing diagram of the recording screen recognition apparatus shown in FIG.

* Explanation of symbols for main parts of the drawings

3, 4: first and second tuners 9: controller

10: memory 11: micom

SW1-SW4: first-fourth switch

The present invention provides a recording screen recognition apparatus and method for distinguishing between a mother screen or a mother screen in a video tape recorder (hereinafter referred to as a VTR) using two or more tuners. It is about.

In general, the VTR uses two or more tuners to display the analog video signal inputted as the main screen (main screen), and the digital signal is displayed on one screen with the sub-screen (sub or small screen). (Picture-in-Picture) function is built in.

Conventionally, in a VTR displaying two or more screens, it is difficult to distinguish between recording states of a mother screen and a child screen on a screen.

In other words, the window (window invading WD) signal and the border enable (below referred to as BE) signal are sent at regular intervals when recording while watching two screens. There was a problem that is difficult to distinguish whether or not the screen.

Accordingly, an object of the present invention is to determine whether the screen to be recorded in a VTR having a PIP function, when the mother screen is recorded without changing the screen, and flickering at a predetermined time interval when the mother screen is recorded. The present invention provides a recording screen recognition apparatus and method capable of distinguishing whether a screen is a screen.

Therefore, in order to achieve the above object, the recording screen recognizing apparatus according to the present invention comprises selecting means for selecting from a plurality of input sources as a signal source of a mother screen and a child screen, and a child screen video signal selected by the selection means. Digital signal processing means for dividing the luminance signal and the chrominance signal, and converting the separated signals into digital signals, storing the converted signals, and outputting the composite analog signal; and the area signal and boundary signal of the sub picture from the selected sub picture video signal. A video tape recorder having a PIP function for displaying a mother screen and a child screen on one screen, the video tape recorder comprising: first switching means for switching an area signal and a boundary signal outputted from the controller; The main screen video signal outputted from the signal processing means is outputted in the magnetic screen area according to the sub-screen area signal switched by the first switching means, and in the case of the mother screen, the main screen video selected by the selection means. Second switching means for switching a signal; Third switching means for outputting a video signal of a boundary portion of the mother screen of the mother screen or the child screen video signal switched by the second switching means in accordance with the boundary signal output from the first switching means; If the screen currently being recorded in the PIP on state is the mother screen, the first switching means controls to switch the area signal and the boundary signal output from the controller, and in the case of the child screen, the second predetermined time at the first predetermined time interval. And a control means for controlling the first switching means to select the sub picture area signal and the boundary signal output from the controller.

In addition, according to the present invention, a recording screen recognition method selects a signal source of a mother screen and a child screen from a plurality of input sources, digitally processes the video signal of the selected child screen, and outputs the composite analog signal. A PIP screen recording recognition method of a video recorder having a PIP function of a video tape recorder having a PIP function of displaying a video signal for a sub-screen on a certain area of the main screen. A key input process for inputting a recording status identification key to determine whether it is a screen; A first step of judging the screen in the recording state when the recording state identification key is input while the PIP is on, and maintaining the normal PIP on state if it is the mother screen; If the screen being recorded is a child screen, the child screen is characterized in that the second process of extinguishing for a second predetermined time at a first predetermined time interval at a predetermined time interval.

Hereinafter, a preferred embodiment of a recording screen recognition apparatus and method according to the present invention will be described with reference to the accompanying drawings.

First, as shown in FIG. 1, two signals from among a plurality of different signals inputted by the two main and sub micoms 1 and 2 selecting the main and sub signals are respectively generated. Inputs are made to the first and second tuners 3 and 4.

The first and second tuners 3 and 4 tune the broadcast according to control signals received from the main and sub-microcoms 1 and 2, that is, the first tuner 3 uses a plurality of signals through the switch SW11. One signal is tuned and output as the first video signal V1, and the second tape 4 is tuned and output as one of the plurality of signals through the switch SW12 as the second video signal V2.

In addition, during the playback (play back: PB) and line signals, the first and second video signals V1 and V2 are output through the switches SW 11 and SW12. In the switches SW13 and SW14, the first video signal V and the second video signal V2 select the first video signal V1 as the video signal of the mother screen according to the control signal output from the controller 9. Then, the second video signal V2 is selected as the video signal of the sub picture.

That is, the first video signal V1 forms a mother screen and outputs a video signal through the line L1 and the first switch SW1 through the signal SW13.

At this time, the horizontal and vertical synchronization signals of the first video signal V1 for the main screen are separated by the synchronization signal separating unit 17 and applied to the controller 9.

The second video signal V2 for the sub picture is applied to the color difference signal and the synchronization signal separator 5 and the color carrier trap 16 through a switch SW14.

Here, the chrominance signal and synchronization signal separator 5 is composed of a decoder, and separates the RY and BY chrominance signals from the input video signal V2 for sub picture, and the horizontal synchronous signal and the vertical signal from the video signal V2. Separate the sync signal.

The color subcarrier trap 6 removes a color component of 3.58 MHz from the sub picture video signal V2, and filters only the luminance signal and outputs it to the switch 7.

Accordingly, the color difference signal and synchronization signal separation unit 5 outputs the horizontal and vertical synchronization signals for the sub picture to the controller 9 while outputting the RY signal and the BY signal to the selection switch 7, and the color carrier carrier trap. (6) outputs a Y signal to the selection switch (7).

The selection switch 7 switches the color difference signal and the output signal of the synchronization signal separator 5 and the color carrier trap 6 in accordance with the Mix control signal output from the controller 9.

The signal switched by the selection switch 7 is applied to an analog / digital (hereinafter referred to as A / D) modulator 8, and in the A / D converter 8 from the controller 9 The analog signal is converted into a digital signal by the applied clock signal.

The converted signal is applied to the controller 9, and the signal input to the controller 9 is stored in the memory 10. The stored signal is applied to the first to third 3D / A converters 13-15 via the controller 9.

The first-third 3D / A converter 13-15 converts the digital signal into an analog signal by a clock signal applied from the controller 9, and the encoder 16 is a signal corresponding to the input signal. The signal on the screen is output through the first and second switches SW1 and SW2.

When the user inputs a recording status identification key to identify whether the screen being recorded is the mother screen or the mother screen, the controller 9 displays the WD signal S1 constituting the contents of the mother screen and the subscreen. The BE signal S2 for determining the edge is output.

The first video signal V1 directly output as described above and the second video signal V2 which have undergone the above-described process are displayed on the screen as an image having different signals through the encoder 16.

Here, the third and fourth switches SW3 and SW4 are connected to the output terminal of the controller 9 which outputs the WD signal S1 and the BE signal S2 while recording the parent screen and the child screen while recording. This is identified by the switching operation of SW3 and SW4.

Here, the timings of the horizontal and vertical sides of the WD signal S1 and the BE signal S2 are as shown in FIG.

On the horizontal side, 1A is a horizontal synchronization signal, 2A is a WD signal S1, and 3A is a BE signal S2. On the vertical side, 4A is a vertical synchronization signal, 5A is a WD signal S1, and 6A is a BE signal S2.

If the PIP screen is being recorded, the third and fourth switches SW3, which are analog switches connected to the output terminal of the controller 9, from which the WD signal S1 and the BE signal S2 are output, in order to distinguish the recording screens, respectively. SW4) the microcomputer 11 counts the vertical synchronous control signal so that the screen is screened at regular intervals (screen removal and replay).

In order to be distinguished by chewing gum, the human detectable time should be 1/16 seconds or more.In this case, the vertical synchronization signal is counted at an interval of 30V (1V is about 16.7 ms in one field period), which is about 0.5 seconds for convenience. (count) to control the microcomputer (11).

At this time, the PIP screen will be back to its original state after about 5 seconds (about 300V).

Looking at the signal operation of the switch (SW1, SW4) in more detail as follows.

When the recording status identification key is pressed, the microcomputer 11 recognizes this key signal, and if the current recording screen is self-displayed, the ″ high (H) '' signal and the ″ low (L) signal for 300V (5 seconds) at 30V intervals (0.5 seconds). Outputs a signal that repeats the

When the control signal is ″ H ″, the third switch SW3 and the fourth switch SW4 are contacted upward, and their outputs are the WD signal S1 at the first switch SW1 and the BE signal at the second switch SW2. (S2) is sent, and in the case of ″ L ″, it is contacted downward and the WD signal S1 and the BE signal S2 are not sent to the first switch SW1 and the second switch SW2.

The WD signal S1 transmitted as the control signal of the first switch SW1 selects the parent screen video signal in the case of ″ L ″ and the sub-screen video signal (PIP content only) in 0.5 second intervals in the case of ″ H ″. Is not sent to the second switch SW2 for 5 seconds.

In case of ″ L ″ by the control of the BE signal S2 on the mother screen and the sub picture video signal sent to the second switch SW2, the analog composite video signal (mother screen) and the digital composite video signal (sub picture) are sorted out. In case of ″ H ″, the border part of the PIP screen does not carry image information, so it is shown in white so that it is easy to know that it is a child screen.

When the currently recorded screen is the mother screen, the microcomputer 11 always outputs a ″ high ″ signal so that the third switch SW3 and the fourth switch SW4 are brought into contact with each other so that the WD signal S1 and the BE signal SW are in contact with each other. Is output as the selection control signal of the first and second switches SW1 and SW2.

In the first and second switches SW1 and SW2, video signals of the mother screen and the child screen are displayed in an area allocated on the screen at the timing shown in FIG. The border of the child screen at this time is displayed as white without exporting image information.

In summary, when the mother screen is recorded, the screen is left unchanged, and when the mother screen is recorded, the child screen is removed and flickered at 0.5 second intervals. Since the information is displayed in white because it is not exported, it is possible to distinguish whether the recording screen is the mother screen or the child screen.

A method of performing the above operation of the present invention will be described as shown in FIG. 2 and described below.

First of all, if you want to identify which screen is being recorded when you are recording one screen while PIP is displaying two screens with different signals (parent screen and subscreen), use the recording status identification key. When pressing (1B), the microcomputer 11 determines whether the key is input, and if there is no recording state identification key input, it checks whether the key is input again.

In step (2B) with the key input, it is determined whether the state being recorded is the mother screen or the child screen, and if the mother screen is the mother screen, the status is maintained and if the mother screen is the mother screen (3B). In the step (3B), the entire sub picture (WD and BE signals as a whole) is made no signal. That is, the mother screen is removed and only the mother screen is output to the first and second switches SW1 and SW2.

In the step (4B), it is determined whether the time (X) in the absence of the child screen is 30V (about 0.5 seconds). If the result is not 30V, check again, and in the step (5B) the child screen Play it back. The magnetic screen is output and reproduced through the third and fourth switches SW3 and SW4 under the control of the WD signal S1 and the BE signal S2 microcomputer 11 shown in FIG.

When the PIP is reproduced on the child screen, it is determined whether the PIP reproduction time (X1) is 30V in step (6B). If it is not 30V, it is again checked whether the playing time X1 is 30V, and if it is 30V, step (7B) is performed.

In the step (7B), the PIP is removed, and it is checked whether the chewing gum time (X 2), in which only the mother screen is reproduced, is 30V (0.5 seconds).

If 300V is reached, the current state is maintained, and if it is not 300V, step (3B) is performed again.

As described above, in the VTR, it is possible to know the screen state that is falling in the situation of displaying two screens, so that the user's curiosity is solved and the user's tool can be satisfied.

Claims (4)

Selecting means (SW 11, SW12, SW13, SW14) for selecting from a plurality of input sources as signal sources of the mother screen and the child screen, and the mother screen video signal selected by the selection means into luminance signals and color difference signals, Digital signal processing means (5, 6, 7, 8, 10, 13-16) for converting the separated signals into digital signals, storing them, and then outputting the composite analog signals, and the magnetic screen from the selected video signal for magnetic screen. A video tape recorder having a PIP function for displaying a mother screen and a child screen on one screen, comprising: a controller 9 for outputting an area signal and a boundary signal of the video signal recorder, comprising: an area signal output from the controller 9; First switching means (SW3, SW4) for switching the boundary signal; The main screen video signal outputted from the signal processing means is outputted in the magnetic screen area according to the sub-screen area signal switched by the first switching means, and in the case of the mother screen, the main screen video selected by the selection means. Second switching means SW1 for switching signals; Third switching means (SW2) in which the boundary portion of the child screen of the mother screen or the child screen video signal switched by the second switching means in accordance with the boundary signal output from the first switching means does not output a video signal. ; If the screen currently being recorded in the PIP on state is the mother screen, the first signal means always switches the area signal and the boundary signal output from the controller, and in the case of the child screen, the second predetermined time at the first predetermined time interval. And control means (11) for controlling the first switching means to select the sub picture area signal and the boundary signal outputted from the controller. A signal source of a mother screen and a child screen is selected from a plurality of input sources, and the video signal of the selected child screen is digitally processed and output as a composite analog signal, and the digital signal processed video signal for the child screen is fixed on a main screen. A PIP screen recording recognition method of a video tape recorder having a PIP function for displaying on an area; A key input process of inputting a recording state identification key to determine whether the current screen is a subscreen or a subscreen; A first step of judging the screen in the recording state when the recording state identification key is input while the PIP is on, and maintaining the normal PIP on state if it is the mother screen; And a second process of extinguishing the screen for a predetermined time at a predetermined time interval if the screen being recorded is a magnetic screen. The method of claim 2, wherein the second process comprises: a first step of removing the PIP for a first predetermined time and reproducing the first predetermined time; And a second step of checking whether the PIP removal and playback are repeated at 300V. 4. The recording screen recognition method according to claim 3, wherein the first step checks whether the PIP removal time and the playback time are 30V, respectively.

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