KR100246914B1 - Method and apparatus for controlling power supply of digital tv receivers - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to a power supply control method and apparatus for a digital television receiver.

I. The technical problem that the invention is trying to solve

The program is output quickly when the power is turned on again after the power supply of the digital television receiver is turned off.

All. Summary of Solution of the Invention

An on-screen graphic generating step of generating an on-screen graphic that causes the entire screen to be black in response to a user's power-off command input while outputting audio and video of the program, and mixing and outputting the video to the program's video; A muting step of muting the audio of the program after a graphic is generated; an on-screen graphic deleting step of deleting the on-screen graphic in response to a power-on command of a user input during the muting; and unmuting the audio of the program. It characterized in that it comprises a mute step.

la. Important uses of the invention

Used for digital television receivers.

Description

Power control method and apparatus for digital television receiver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to digital television receivers, and more particularly, to a power control method and apparatus for a digital television receiver.

A power supply control method of a conventional digital television receiver is as follows. When the user provides AC power to the digital television receiver, the digital television receiver enters the STANDBY mode. In the standby mode, the digital television receiver drives an auxiliary power supply to enable an operation such as turning on the power in response to a power-on key input of the user.

When the user inputs a power-on key in the standby mode, the digital television receiver initializes a tuner, an MPEG decoder, and the like, and tunes and outputs a program of a channel previously watched. Here, initialization of the tuner, the amplifier decoder, etc. takes 8 seconds or more.

However, when a user who is watching a digital television receiver commands a power-off while watching a program with the digital television receiver and immediately orders power-on, the digital television receiver enters a standby mode in response to the power-off command. In response to the power-on command, the tuner and the amplifier decoders are initialized again, and the program of the channel previously watched is tuned and output.

Accordingly, even when the user powers on immediately after the power off, it takes a lot of time for the conventional digital television receiver to output the program again.

As described above, when the power-off command is issued immediately after the power-off command, the conventional digital television receiver has a problem that it takes a long time to enter the previous power-on state again.

Accordingly, an object of the present invention is to provide a power control method of a digital television receiver which enters a previous power-on state quickly when a power-on command is executed again immediately after a power-off command.

1 is a block diagram of an HDTV receiver to which the present invention is applicable;

2 is a flowchart of a power control method for a digital television receiver according to a preferred embodiment of the present invention.

In order to achieve the above object, the present invention generates an on-screen graphic that causes the entire screen to be black in response to a user's power-off command input while outputting audio and video of a program, and then mixes and outputs the video of the program. An on-screen graphic generating step, a muting step of muting audio of the program after the on-screen graphic is generated, an on-screen graphic deleting step of deleting the on-screen graphic in response to a power-on command of a user input during the muting; And a muting step of releasing muting of the audio of the program.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the annexed drawings, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of a high definition television receiver, which is a digital television receiver to which the present invention is applicable. The tuner 102 is a user selected RF from a broadcast reception signal through an antenna 100. A radio frequency channel is tuned under the control of the microprocessor 124. Accordingly, the tuner 102 outputs a channel tuned intermediate frequency (IF) signal, and is converted into a baseband signal by the IF module 104 and output to the channel decoder 106. The channel decoder 106 reproduces the TS (Transport Stream) by channel decoding the baseband signal input from the IF module 104. The TS reproduced in this manner is separated into an audio stream, a video stream, and an additional data stream by the TS decoder 108, respectively.

The audio stream is applied to the audio decoder 110 to restore audio data. The audio data is processed by the audio processor 112 as a voice signal and then output to the speaker 114. The video stream is applied to the video decoder 116 and restored as video data, and the video data is applied to an On Screen Graphic (OSG) mixer 118 to provide OSG data under control of the microprocessor 124. After mixing and processing in the image processing and output unit 120 is applied to the water pipe 122 as a video signal.

The microprocessor 124 transmits an operation according to a command input through a user interface 134 from a keypad 128 or a remote pointing device 130 to the memory unit 126. Run according to the stored program. The remote pointing device 130 is a pointing device that enables the position of the pointer displayed on the water pipe 122 to be moved wirelessly. In addition, the remote pointing device 130 is provided with a vibration sensor therein to detect the movement of the remote pointing device 130, and provides the sensing signal according to the infrared to the remote receiver 132. The remote receiver 132 receives the infrared rays corresponding to the sensing signal and provides the sensing information to the microprocessor 124 through the user interface 134. The remote receiver 132 receives the pointing movement information according to the movement of the remote pointing device 132 and provides it to the microprocessor 124, and provides a sensing signal to the remote pointing device 132 to the microprocessor 124. do.

An additional data stream is applied to the microprocessor 124 from the TS decoder 108, and the additional data includes electronic program guide information.

The memory unit 126 may include a read only memory (ROM) for storing a program of the microprocessor 124, a RAM for temporarily storing data according to program execution of the microprocessor 124, and various reference data. EEPROM (Electrically Erasable and Programmable ROM) for storing the data.

The power supply unit 136 supplies operating power to each part of FIG. 1 under the control of the microprocessor 124. First, when the microprocessor 124 commands to enter the standby mode, the power supply 136 supplies the microprocessor 124, the memory unit 126, the user interface 128, the keypad 130, and the remote receiver 134. Supply power to the back. When the microprocessor 124 commands the power-on mode, the power supply 136 supplies power to the other parts.

An embodiment of the present invention will be described in detail with reference to FIG. 2, which shows a flowchart of a power control method according to a preferred embodiment of the present invention applicable to an HDTV receiver as described above.

The HDTV receiver usually outputs audio and video of a program of a specific channel in a power-on mode, i.e., power is supplied to all parts of FIG.

As described above, the microprocessor 124 performs the step 138 while outputting the audio and video of the program. In step 138, the microprocessor 124 searches whether the user inputs a power-off command by using the keypad 130 or the remote controller 132. At this time, if the user inputs a power-off command, the microprocessor 124 performs step 140, otherwise proceeds to step 150 to perform the corresponding operation.

In step 140, the microprocessor 124 provides the OSG mixer 118 with an OSD that causes the entire screen to be black. In this case, the OSD mixer 118 mixes the video signal from the video decoder 116 and the OSD and outputs the mixed OSD. The image processing and output unit 120 outputs the mixed screen of the video signal and the OSD to the water pipe 112, which is a black image of the entire screen.

After blacking the image output to the water pipe 112 as described above, the microprocessor 124 mutes the audio of the program. Accordingly, the audio of the program output to the speaker 114 is cut off.

After outputting the black image to the water pipe 112 and muting the audio of the program, the microprocessor 124 performs step 142. In step 142, the microprocessor 124 searches whether the user inputs a power-on command by using the keypad 130 or the remote controller 132. At this time, if the user inputs a power-on command, the microprocessor 124 performs step 146, otherwise proceeds to step 144.

In step 146, the microprocessor 124 stops the output of the OSD to control the video of the program output to the water pipe 112, and releases the audio mute to control and output the audio of the program and ends. Thus, video and audio of the program are output.

In step 144, the microprocessor 124 searches whether a predetermined time has elapsed. At this time, if a predetermined time has elapsed, the microprocessor 124 proceeds to step 148. Otherwise, the microprocessor 124 continuously searches whether the user inputs a power-on command.

In step 148, the microprocessor 124 enters the standby mode. The microprocessor 124 enters the standby mode.

Hereinafter, the operation of the present invention described above will be described. First, when a user inputs a power-off command while watching a program, the HDTV receiver does not immediately enter the standby mode, but outputs a black image to the receiver for a predetermined time and mutes the audio. That is, the power of the HDTV receiver appears to be turned off according to the power off command of the user. If the user inputs the power-on command while maintaining the above state, the video of the program is output again, and the audio is unmuted.

If the user does not input a power-on command for the predetermined time, the HDTV receiver enters the standby mode.

As described above, the present invention maintains the power-on state for a predetermined time even when the power-off command is input, and promptly outputs the program when the user immediately inputs the power-on command to wait for the program to be output after the power-on. Shorten it.

As described above, when the user inputs the power-on command immediately after the user inputs the power-off command, the present invention quickly outputs a previously watched program, thereby shortening the waiting time for the user to output the program after power-on. There is this.

Claims (3)

In the power control method of a digital television receiver, An on-screen graphic generating step of generating an on-screen graphic that causes the entire screen to be black in response to a user's power-off command input while outputting audio and video of the program, and mixing and outputting the video to the program's video; A muting step of muting audio of the program after generating the on-screen graphic; An on-screen graphic deleting step of deleting the on-screen graphic in response to a user's power-on command input during the mute; And a muting step of releasing muting of the audio of the program. The method of claim 1, wherein And if the user's power-on command is not input for a predetermined time after the muting, entering a standby mode. In the power supply control apparatus of a digital television receiver, An audio output unit for outputting audio of a program, executing a mute according to a mute command, and releasing mute according to a mute cancel command; An on-screen graphic mixing unit for mixing and outputting graphics according to video of the program and on-screen graphic data; A video output unit which outputs the output of the on-screen graphic mixing unit to the water pipe; A user interface unit for receiving a user command, In response to the power-off command of the user, providing on-screen graphic data to make the entire screen black, the on-screen graphic mixing unit, and providing an audio mute command to the audio output unit, in response to the power-on command of the user And a microprocessor for deleting the on-screen graphic data and providing a mute release command to an audio output unit.

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