KR0122511B1 - Automatic display of program reserver in picture-in-picture system - Google Patents

Abstract

A automatic display circuit and method of the reserved program for the PIP system whereby the reserved program display in the sub-screen at the reserved time automatically.

Description

Reserved program automatic display circuit in picture-in-picture system

1 is a flow chart illustrating a channel scan state in a general picture-in-picture system (hereinafter, referred to as a PIP system).

2 is a block diagram of a reservation program automatic display circuit in a PIP system according to the present invention.

* Explanation of symbols for main parts of the drawings

12: Splitter 14,16: 1st, 2nd tuner

18,20: first and second video signal processor 22: PIP signal processor

24: control unit 26: timer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Picture-In-Picture system, and more particularly to a reservation program automatic display circuit in a PIP system that automatically displays a PIP sub-screen of a program of a reserved channel at a preset reservation time. It is about.

In general, a system having a PIP function, for example, a TV, a video cassette record player, etc., selects one broadcast program to watch on the parent screen, and selects another broadcast program to view on its own screen. It is a well known fact.

As shown in FIG. 1, the PIP system selects one broadcast program and is watching on the parent screen 100. As shown in FIG. 1, the PIP system uses the PIP function to display the child screen on the parent screen 100. After displaying 102, a program of a broadcast channel can be scanned using the displayed subscreen 102. FIG. In addition, such a PIP system can change the display of the mother screen 100 and the mother screen 102 by the user's selection, and can change the screen displayed on the mother screen to the mother screen for viewing.

For example, as shown in FIG. 1, after selecting the channel by displaying the mother screen 102 on the mother screen 100, the display of the mother screen 100 is removed and one mother screen 102 is displayed. You can switch to the screen.

However, in the conventional PIP system as described above, in order to check what programs are broadcast on each broadcast channel using the PIP function, or to view a desired broadcast program using the PIP function, a user manually operates the remote control or the like. It was cumbersome to watch PIP screen by doing so. In addition, the conventional PIP system can not automatically display the program of the desired channel on the sub screen of the PIP, and even though there is a PIP function, there is a lot of inconvenience in use by displaying the program of the desired channel by manual operation.

Accordingly, an object of the present invention is to provide a reservation program automatic display circuit in a picture-in-picture system for automatically displaying a program of a reserved channel at a reserved time on a child screen in a mother screen of a PIP.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a reservation program automatic display circuit in a picture-in-picture system according to the present invention, which shows a block configuration for an operation according to the present invention in an image processing system having two tuners. In FIG. 2, reference numeral 12 denotes a distributor for distributing the radio wave received by the antenna to at least one output terminal. Further, reference numerals 14 and 16 are connected to respective output terminals of the distributor 12 to input signals therefrom, and select and output video signals of the corresponding channel in response to the operation control signal and the channel selection data. It is a 1st, 2nd tuner. Reference numerals 18 and 20 denote first and second video signal processing units which output the demodulated composite video signals by processing the video signals output from the first and second tuners 14 and 16, respectively. Reference numeral 22 denotes a composite image signal output from the first image signal processor 18 or the second image signal processor 20 to the display unit CRT and at the same time input of display control data (DCD). In response to the PIP signal processing unit for processing the PIP signal of the composite video signal output from the first and second video signal processing unit (18, 20), respectively. At this time, the video signal output from the PIP signal processor 22 is supplied to a display (CRT) not shown. Finally, 24 analyzes an input state of a control signal (CS) to set a reservation time and a reservation channel in an internal register, and the first tuner 14 or the second tuner 16 at the reserved time. The control unit 24 supplies an operation control signal and channel selection data to the PIP signal processing unit 22. The control unit 24 is a one-chip microprocessor that is currently used for general purposes. It is available.

Before the operation of FIG. 2 according to the present invention is described in detail, the first image signal processor 18 shown in FIG. 2 is an image processor for processing a composite video signal of a mother screen, and the second image signal processor 20 ) Will be described under the assumption that it is an image processor that processes the sub picture of the PIP.

Now, when the second circuit is operated, the divider 12 distributes and supplies the signals received from the antennas to the first and second tuners 14 and 16, respectively. At this time, the control unit 24 outputs the operation control signal to the first tuner 14 at the time of initial power supply, and supplies the previously selected channel selection data. The first tuner 14 operates in response to an input of an operation control signal.

By the above operation, the first tuner 14 selects a broadcast signal source of a channel corresponding to the channel selection data from the input radio signal and outputs it to the first image signal processor 18. The first video signal processor 18 outputs a video signal output from the first tuner 14 and a demodulated video signal to the PIP signal processor 22.

The PIP signal processor 22 outputs an image signal output from the first image signal processor 18 to a display (not shown) during normal operation. At this time, the control of the PIP signal processor 22 is controlled by the display control data DCD output from the controller 24. Therefore, in the normal state, the video signal of the channel selected by the first tuner 14 is displayed from the indicator.

In the above state, when the user sets the display time of the sub picture of the PIP and a signal for setting a desired channel by using an input device (not shown) such as a remote controller, the corresponding reservation time and data of the selected channel Is input to the control unit 24 as a control signal CS. The control unit 24 receives the control signal CS from the input device and stores the reserved time and the reserved channel, which is a selected channel, in an internal register.

As described above, the controller 24 which sets the reservation time and the selection channel by the user's selection in the internal registers reads the current time from the internal tire 24 at predetermined intervals, and the current time and the internal registers. Compare the reservation time set in.

If it is determined that the current time and the reservation time are the same as the result of the time comparison, the controller 24 outputs the operation control signal to the second tuner 16 and simultaneously reads the reserved channel data stored in the internal register and selects the channel. The data is supplied to the second tuner 16 as data. The controller 24 outputs the display control data DCD for PIP processing to the PIP signal processor 22.

At this time, the second tuner 16 is operated by the operation control signal output from the control unit 24. The second tuner 16 is enabled by an operation control signal and is a signal source for sending a channel corresponding to the channel selection data among the received propagation signals output from the distributor 12 in response to the channel selection data output from the controller 24. Is selected and supplied to the second image signal processing unit 20.

The second video signal processor 20 demodulates a signal output from the second tuner 16 and supplies a composite video signal to the PIP signal processor 22. At this time, the PIP signal processing unit 22 for inputting the composite video signal of the two channels output from the first and second video signal processing units 18 and 20, respectively, outputs the PIP display control data DCD output from the control unit 24. In response to), two composite video signals are outputted to the display.

For example, the composite video signal output from the first video signal processor 18 is the mother screen of the PIP, and the composite video signal output from the second video processor 20 is the PIP video signal of the child screen of the PIP. Output as processed.

Accordingly, it can be seen that the first tuner 14 selects and outputs an image signal of a channel selected at the same time the power is turned on. The second tuner 16 operates at a time reserved by the user to correspond to a program of the reserved channel. The PIP signal processor 22 selects and outputs the video signal, and the PIP signal processor 22 performs a PIP image process on the composite video signal output from the two tuners under the control of the controller 24 to reserve at the time reserved for the current viewing screen. The subchannel image is displayed.

Although not described in detail in the above-described embodiment, the VCR having the PIP function can monitor the reservation recording on the sub picture of the PIP while watching the broadcast of other channels even during the reservation recording, thereby ensuring the accuracy of the recording.

As described above, the present invention facilitates the user's program selection by automatically displaying the PIP's own screen at the scheduled time while the PIP system is watching the current broadcast program on one screen. There is an advantage to this.

Claims (1)

A reservation program automatic display circuit in a PIP system that can display a broadcast program received with an antenna and at least one tuner as a PIP on a display, comprising: a distributor for distributing radio waves received by the antenna to at least one output terminal; First and second tuners connected to respective output terminals of the distributor and input signals therefrom, and selecting and outputting video signals of corresponding channels in response to input of operation control signals and channel selection data; First and second video signal processing units for processing video signals output from the first and second tuners, respectively, and outputting demodulated composite video signals, and the composite video output from the first and second video signal processing units, respectively. Selectively outputs a signal to the indicator, or responds to the first and second image signal processing units in response to input of PIP display control data A PIP signal processing unit which processes each of the composite video signals output as a PIP video signal and outputs them to the display, and outputs an operation control signal to the first tuner at the initial operation and supplies previously selected channel selection data. Analyzes the input state of the control signal, sets the reservation time and the reservation channel in an internal register, supplies the operation control signal and the channel selection data to the second tuner at the reserved time, and simultaneously supplies the PIP display control data to the PIP. A reservation program automatic display circuit in a PIP system, characterized by comprising a control unit supplied to a signal processing unit.