KR20020023495A - Digital video player having a picture in picture function and control method of the same - Google Patents

Abstract

PURPOSE: A digital video disk player having PIP function and a method of controlling the player are provided to switch a DVD reproduced picture or TV picture to a mother picture or sun picture according to a user's selection and to control the size of the sun picture. CONSTITUTION: A digital video disk player having PIP function includes a tuner(20) for selecting a desired channel, a video detector(30) for detecting a channel signal applied to the tuner, an audio detector(40) for detecting an audio signal extracted by the video detector, and a DVD data extracting unit(50) for extracting a video signal and an audio signal from a digital video disk to output MPEG bit streams. The DVD player further has an MPEG decoder(70) for decoding the output data of the DVD data extracting unit, a video switch(72,74) for outputting the video signal as a mother picture and a sun picture, an audio switch(76,78) for outputting the audio signal as the sounds of a mother picture and a sun picture, a PIP module(80) for outputting the video signal as a mother pictures and a sun pictures and setting the size of the sun picture, and a video signal processor(90) for converting the digital video signal output from the PIP module into an analog signal. The DVD player also has an audio signal processor(110) for converting the digital audio signal output from the audio switch into an analog signal, and a CRT(100) for displaying the video signal output from the video signal processor.

Description

DIGITAL VIDEO PLAYER HAVING A PICTURE IN PICTURE FUNCTION AND CONTROL METHOD OF THE SAME

The present invention relates to a digital video disc playback device having a PIP function and a playback control method thereof, and more particularly, to select and output a television screen and a digital video disc playback screen as a mother screen or a child screen. A digital video disc reproducing apparatus having a PIP function capable of selectively outputting an audio output and a reproduction control method thereof.

As is well known, a television having a picture in picture (PIP) function has a switching function of switching between a main screen displaying a screen of one channel and a subscreen displaying a screen of another channel in a predetermined portion of the main screen. Have

First, in order to display a plurality of screens in one television, a plurality of tuners corresponding to each output screen are provided to select and output each channel received from the antenna through the tuner.

The channel signal applied to the tuner is input and detected by each image detector, and the image detector outputs a video signal of a different channel and provides it to each voice detector, and simultaneously outputs a video signal to the video switching switch. The video signal through the video switching switch is output through the PIP module.

However, since the PIP function outputs a child screen having a constant aspect ratio at a specific position on the mother screen, it is impossible to adjust the output screen size of the current child screen according to the user's selection. Since only the voice is output and the voice outputs of the mother screen and the child screen are not switched to each other, the user has to perform a key operation for converting the child screen to the full screen in order to output the voice of the child screen.

In addition, when the DVD (Digital Video Disc) playback signal is displayed on the PIP screen, if the PIP screen off signal is input, the PIP screen disappears and the DVD playback is stopped. In doing so, the user must select the DVD playback mode and the PIP screen mode by key operation. Also, when the PIP screen off signal is input, the PIP sub screen disappears and the DVD playback is continuously performed. Also, when the user wants to output the DVD playback screen by PIP, the user must return the DVD to the desired track. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and a mother screen or a child screen can be freely selected as a TV screen applied from a tuner or a playback screen reproduced from a DVD, and the size of the child screen output on the mother screen is increased. A digital video disc playback device having a PIP function and a playback control method thereof, which are adjusted to be variable according to a user's selection and that can output audio of a child screen or a mother screen according to a user's selection. There is a purpose.

When the PIP screen off signal is input, the DVD playback is paused. If the PIP screen ON signal is input before the set time has elapsed, the DVD pause is released and the PIP screen on time is exceeded. It is an object of the present invention to provide a digital video disc reproducing apparatus having a PIP function that stops reproduction of a DVD when a signal is not applied, and a reproduction control method thereof.

1 is a block diagram showing the configuration of a digital video disc reproducing apparatus having a PIP function according to an embodiment of the present invention;

2 is a flowchart showing a reproduction control method of a digital video disc reproducing apparatus having a PIP function according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: key input unit, 20: tuner unit,

30: image detector, 40: voice detector,

50: DVD data extraction section, 60: buffer,

70: MPEG decoder, 72, 74: Video switch,

76, 78: voice switch, 80: PIP module,

90: video signal processor, 100: CRT,

110: audio signal processing unit, 120: audio amplifier,

130: control unit.

In order to achieve the above object, according to a preferred embodiment of the present invention inputs the PIP function selection and the sub picture playback target selection signal, input the input signal for controlling the size of the child screen, the voice output selection signal of the mother screen and the child screen A key input unit; A tuner unit which selects a desired channel and outputs a signal when a key input signal for TV reproduction is applied; An image detector selected by the key input unit to detect a channel signal applied to the tuner unit as an outputable signal through an antenna; A voice detector for detecting the audio signal extracted from the image detector as an outputable signal; A DVD data extraction unit for extracting a video signal and an audio signal from a digital video disc (DVD) and outputting an MPEG bit stream; A buffer for storing output data of the DVD data extraction unit; An MPEG decoder for outputting a video signal by reading and decoding stored data of the buffer; An image switching switch for outputting a video signal applied from the image detector and the MPEG decoder as an image of a mother screen and a child screen in cooperation with each other; An audio switching switch for extracting an audio signal from the image detector and the MPEG decoder and outputting the audio of the mother screen and the mother screen; The video signal of the specific channel applied from the tuner unit and the video signal extracted from the DVD data extracting unit are switched through the image switching switch and applied to each input terminal to output the image to the mother screen and the child screen. A PIP module for setting a screen size; An image signal processor for converting the digital video signal output through the PIP module into an analog signal capable of outputting a screen; A CRT for screen outputting the video signal output through the video signal processor; A voice signal processing unit for converting the digital voice signal applied through the voice switching switch into an analog signal; An audio amplifier for amplifying and outputting a voice signal output from the voice signal processor; Switching control of the image switching switch outputs a video signal applied from the image detector and the MPEG decoder to a mother screen and a child screen image, and controls to adjust the size of the child screen output through the PIP module. And by selectively controlling the voice switching switch according to an operation of the key input unit, selectively outputs a specific voice among voices of the mother screen and the child screen, and according to the PIP OFF signal applied from the key input unit. Alternatively, the operation of the DVD data extractor is paused. If a PIP ON signal is not applied for a preset time, a control signal is generated so that the corresponding sub picture can be reproduced and stopped, and a PIP ON signal within a preset time. PIP function, characterized in that the control unit for generating a playback control signal to play the sub-screen when is applied A digital video disc reproducing apparatus having is provided.

Meanwhile, according to the present invention, in the method for outputting a TV broadcast signal and a DVD playback signal on the same screen of a device having a PIP function, it is possible to select which of the TV broadcast signal and the DVD playback signal to be reproduced on its own screen. Steps; Adjusting the size of the sub picture by using a signal input for adjusting the size of the sub picture; When the PIP magnetic screen off signal is input, removing the PIP magnetic screen and pausing to stop the output operation of the magnetic screen output target; Counting the time from the PIP off time; if the sub picture output target is a DVD when the PIP ON signal is applied within the preset time, signal reproduction is performed from the paused time point, and the preset time is exceeded. A method of controlling a digital video disc playback having a PIP function is provided, the method including stopping the screen display of the DVD or the TV which is a sub picture playback object.

More preferably, the playback control method for selectively outputting TV channel signals and digital video disc playback signals as video signals of the parent screen and the child screen includes selecting an audio signal playback for the mother screen or the child screen; Generating a switching control signal by receiving an audio signal reproduction signal for an applied specific screen and outputting the corresponding audio signal; And switching by the switching control signal to output an audio signal for a specific screen.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

1 is a block diagram showing the configuration of a digital video disc playback apparatus having a PIP function according to an embodiment of the present invention.

Referring to this, reference numeral 10 denotes a PIP (Picture in Picture) function selection and a sub picture playback target selection signal, a key input for inputting a resize signal of the sub picture and a voice output selection signal of the sub picture and the sub picture. Represents wealth.

Reference numeral 20 denotes a tuner unit which selects a desired channel and outputs a signal when a key input signal for TV reproduction is applied from the key input unit 10, and reference numeral 30 is selected by the key input unit 10 to mediate an antenna. To detect the channel signal applied to the tuner unit 20 as an outputable signal.

Reference numeral 40 denotes a voice detector for detecting the audio signal extracted from the image detector 30 as an outputable signal, and reference numeral 50 denotes an MPEG signal by extracting a video signal and an audio signal from a digital video disc (DVD). A DVD data extraction unit for outputting a bit stream is shown.

Reference numeral 60 denotes a buffer for storing the output data of the DVD data extraction unit 50, and reference numeral 70 denotes an MPEG decoder for outputting a video signal by reading and decoding the stored data of the buffer 60.

On the other hand, reference numerals 72 and 74 indicate an image switching switch for outputting a video signal applied from the image detector 30 and the MPEG decoder 70 as a mother screen and a child screen in interworking with each other. 76 and 78 indicate an audio switching switch for extracting an audio signal from the image detector 30 and the MPEG decoder 70 and outputting the audio of the mother screen and the mother screen.

Reference numeral 80 denotes a video signal of a specific channel applied to the tuner unit 20 and a video signal extracted from the DVD data extracting unit 50 are switched through the image switching switches 72 and 74 to each input terminal. It displays PIP module for setting the size of the subscreen and the image output to the parent screen and subscreen.

On the other hand, reference numeral 90 denotes an image signal processor for converting the digital video signal output through the PIP module 80 into an analog signal capable of outputting the screen, and reference numeral 100 denotes an output signal through the image signal processor 90. CRT which outputs a video signal.

Reference numeral 110 denotes a voice signal processing unit for converting a digital voice signal applied through the voice switching switches 76 and 78 into an analog signal, and reference numeral 120 denotes a voice signal output from the voice signal processing unit 110. Represents an audio amplifier for amplified output.

In addition, the reference numeral 130 controls switching of the image switching switches 72 and 74 to output the video signals applied from the image detector 30 and the MPEG decoder 70 to a mother screen and a child screen image. A control is performed to adjust the size of the magnetic screen output through the PIP module 80. The mother screen and the magnetic screen are controlled by switching the voice switching switches 76 and 78 according to the operation of the key input unit 10. A control unit for selectively outputting a specific voice of the voices.

In addition, the controller 130 temporarily stops the operation of the tuner 20 or the DVD data extractor 50 according to the PIP OFF signal applied from the key input unit 10, and during the preset time. If the PIP ON signal is not applied, a control signal is generated so that the reproduction operation of the sub picture reproducing means (e.g., tuner unit or DVD data extracting unit) can be performed, and the PIP ON signal within a preset time. When is applied, the corresponding sub picture reproduction means (for example, a tuner unit or a DVD data extracting unit) is operated to control the sub picture display.

At this time, when the sub picture reproduction target is a DVD, a PIP OFF signal is generated to play from the paused position.

The function and operation of a digital video disc reproducing apparatus having a PIP function and a reproduction control method according to an embodiment of the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings.

2 is a flowchart showing a reproduction control method of a digital video disc reproducing apparatus having a PIP function according to an embodiment of the present invention.

First, the present digital video disc reproducing apparatus is roughly divided into four functions, and a control method thereof will be described later.

First, to control the output of the PIP subscreen selectively between TV channel signal and DVD playback signal, secondly to adjust the subscreen size to selectively adjust the size of the PIP subscreen, and third to turn off the PIP subscreen. When the signal is input, the TV tuner or the DVD playback means is kept in the standby state and the TV tuner or DVD playback means is turned off while the PIP subscreen is turned off before a certain time has elapsed. And, fourthly, the audio signal output through the audio amplifier is classified into a function of selectively outputting the audio signal for the mother screen and the child screen.

In more detail, first, the controller 130 checks whether the CRT 100 outputs a sub picture. That is, it is determined whether the PIP is ON. At this time, since the video signal output to the mother screen and the child screen of the PIP can be selectively set, it is set whether to output a DVD or a TV screen to the child screen of the PIP.

At this time, when outputting the DVD to the child screen of the PIP, it is possible to change the size of the child screen output based on the key operation of the key input unit 10. That is, when a signal for setting the size of the own screen is applied to the controller 130, the controller 130 may change the size of the own screen by controlling the PIP module 80.

Next, the controller 130 determines whether a command for deleting a PIP sub picture is input. That is, it is determined whether the PIP child screen (DVD playback screen) OFF signal is applied. When the PIP OFF signal is applied, the controller 130 temporarily stops the operation of the DVD data extractor 50 and removes the magnetic screen output to the CRT 100.

At the same time, the control unit 130 calculates a time from the pause time of the DVD data extraction unit 50 using the counter therein. At this time, when the PIP screen display ON signal is applied to the controller 130 in the state where the preset time has not elapsed, the DVD data extracting unit 50 is operated again so that the screen playback output is performed. At this time, the control unit 130 stores the final pause position of the DVD so that the DVD sub picture can be reproduced from the pause position of the DVD.

On the other hand, if the PIP sub picture ON signal is not applied to exceed the preset time, the controller 130 outputs a playback stop signal to the DVD data extraction unit 50.

On the other hand, even when the target to be output to the PIP sub picture is a TV is made in the same manner as the DVD playback output.

In addition, when the user inputs the audio signal reproduction for the video signal output to the mother screen or the child screen through the key input unit 10, the controller 130 switches the voice according to the audio reproduction target selection signal. A switching control signal is generated at the switches 76 and 78 to output the audio signal extracted from the image detector 30 or the MPEG decoder 70.

On the other hand, the digital video disc playback apparatus having the PIP function and the playback control method thereof according to the embodiment of the present invention are not limited to the above embodiments but various modifications can be made without departing from the technical gist of the present invention.

As described above, according to the digital video disc playback apparatus having the PIP function and the playback control method thereof, the DVD playback screen and the TV screen can be freely switched to the mother screen or the child screen according to the user's selection. The screen size of the child screen can be adjusted, and the audio output of the child screen and the mother screen can be selectively switched.

Claims (3)

A key input unit for inputting a PIP function selection and a sub picture reproduction target selection signal, and inputting a resize signal of the sub picture, and a voice output selection signal for the sub picture and the sub picture; A tuner unit which selects a desired channel and outputs a signal when a key input signal for TV reproduction is applied; An image detector selected by the key input unit to detect a channel signal applied to the tuner unit as an outputable signal through an antenna; A voice detector for detecting the audio signal extracted from the image detector as an outputable signal; A DVD data extraction unit for extracting a video signal and an audio signal from a digital video disc (DVD) and outputting an MPEG bit stream; A buffer for storing output data of the DVD data extraction unit; An MPEG decoder for outputting a video signal by reading and decoding stored data of the buffer; An image switching switch for outputting a video signal applied from the image detector and the MPEG decoder as an image of a mother screen and a child screen in cooperation with each other; An audio switching switch for extracting an audio signal from the image detector and the MPEG decoder and outputting the audio of the mother screen and the mother screen; The video signal of the specific channel applied from the tuner unit and the video signal extracted from the DVD data extracting unit are switched through the image switching switch and applied to each input terminal to output the image to the mother screen and the child screen. A PIP module for setting a screen size; An image signal processor converting the digital video signal outputted through the PIP module into an analog signal capable of outputting a screen; A CRT for screen outputting the video signal output through the video signal processor; A voice signal processing unit for converting the digital voice signal applied through the voice switching switch into an analog signal; An audio amplifier for amplifying and outputting a voice signal output from the voice signal processor; Switching control of the image switching switch outputs a video signal applied from the image detector and the MPEG decoder to a mother screen and a child screen image, and controls to adjust the size of the child screen output through the PIP module. And by selectively controlling the voice switching switch according to an operation of the key input unit, selectively outputs a specific voice among voices of the mother screen and the child screen, and according to the PIP OFF signal applied from the key input unit. Alternatively, the operation of the DVD data extractor is paused. If a PIP ON signal is not applied for a preset time, a control signal is generated so that the corresponding sub picture can be reproduced and stopped, and a PIP ON signal within a preset time. PIP function, characterized in that the control unit for generating a playback control signal to play the sub-screen when is applied Having a digital video disc playback device. In the method for outputting a TV broadcast signal and a DVD playback signal on the same screen of a device having a PIP function, Selecting which of the TV broadcast signal and the DVD playback signal is to be reproduced on its own screen; Adjusting the size of the sub picture by using a signal input for adjusting the size of the sub picture; When the PIP magnetic screen off signal is input, removing the PIP magnetic screen and pausing to stop the output operation of the magnetic screen output target; Counting time from the time of PIP off; When the PIP ON signal is applied within the preset time, if the sub picture output target is a DVD, signal reproduction is performed from the paused point. If the preset time is exceeded, the screen of the DVD or TV which is the sub picture playback target is exceeded. Digital video disc playback control method having a PIP function comprising the step of stopping the display. The reproduction control method for selectively outputting a TV channel signal and a digital video disc reproduction signal as a video signal of a mother screen and a child screen comprises: selecting an audio signal reproduction for a mother screen or a child screen; Generating a switching control signal by receiving an audio signal reproduction signal for an applied specific screen and outputting the corresponding audio signal; And controlling the audio signal for a specific screen by switching by the switching control signal, and outputting the audio signal for a specific screen.