KR100247048B1 - Method of converting video and audio output - Google Patents

Abstract

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

The present invention relates to a method for switching video and audio output in a multichannel television receiver.

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

Allows the user to browse a channel while viewing an image of one channel of the program while listening to the audio output of the program of another channel.

All. Summary of Solution of the Invention

If the user commands video switching to the second digital channel while the audio and video transport packet of the program of the first digital channel is selected and reproduced from the transport packet having a plurality of programs mixed therein, in response to the command, In the transport packet, the audio transport packet of the program of the first digital channel and the video transport packet of the program of the second digital channel are selected and reproduced.

la. Important uses of the invention

Used in multichannel television receivers.

Description

How to switch video and audio output {METHOD OF CONVERTING VIDEO AND AUDIO OUTPUT}

TECHNICAL FIELD The present invention relates to a multichannel television receiver, and more particularly to a channel searching method.

Television receivers typically output audio and video for one channel. At this time, the user watches the audio and video output by the television receiver.

In order to find out which program is broadcasted in another channel while the user is watching a program of a specific channel, the user has conventionally switched a channel of the television receiver.

Accordingly, the television tuned a channel according to a user's selection and outputs audio and video according to a program of the corresponding channel. As described above, as the television outputs audio and video according to the program of the channel selected by the user again, the user can know what program is broadcasted on the channel. Here, the channel searching is called channel switching to find out which program the user broadcasts on another channel.

However, while the user is channel searching, the television receiver no longer outputs audio and video for the channel the user is watching. Accordingly, the user searches for another channel in consideration of interruption of viewing of the channel being viewed.

As described above, when a user performs a channel search, audio and video output of a channel previously viewed has been difficult.

Accordingly, it is an object of the present invention to provide a method for switching video and audio output in a multi-channel television receiver, in which only audio or video output is switched during channel search so that a user can know the progress of a program of a channel previously viewed.

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

2 is a process flow diagram according to a preferred embodiment of the present invention;

3 is a hierarchical configuration diagram of a transport packet.

In order to achieve the above object, the present invention converts a video to a second digital channel while a user selects and outputs an audio and video transport packet of a program of a first digital channel from a transport packet including a plurality of programs. In response to the command, the audio transport packet of the program of the first digital channel and the video transport packet of the program of the second digital channel are selected and reproduced from the transport packet.

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.

First, a digital multi-channel broadcast to which the present invention is applicable carries a transport packet on one high frequency channel, and the transport packet may be composed of a plurality of programs. That is, the digital multichannel broadcasting can transmit a plurality of programs simultaneously on one high frequency channel.

As described above, since digital multichannel broadcasting can transmit a plurality of programs simultaneously on one high frequency channel, a digital channel corresponding to the plurality of programs is set to distinguish the plurality of programs. Accordingly, digital multichannel broadcasting has a plurality of digital channels for one high frequency channel, and the digital channel varies according to the number of programs.

The digital multi-channel broadcast receiver tunes a specific high frequency channel according to a user's selection and receives a transport packet from the specific high frequency channel. The digital multi-channel broadcast receiver separates video and audio transport packets corresponding to a program of a digital channel selected by a user from among a plurality of digital channels belonging to the specific high frequency channel from the transport packet. The digital multi-channel broadcast receiver outputs audio according to the separated audio packet through a speaker, and receives an award according to the video transport packet to the receiving hall.

Referring to FIG. 1, which shows a block diagram of an HDTV that is a digital multi-channel broadcast receiver, the tuner 102 selects an RF channel selected by a user from a broadcast received signal through an antenna 100. Tuning is performed under the control of 124). Accordingly, the tuner 102 outputs a channel-selected 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 decoder 108 separates and outputs an audio stream and a video stream according to a program selected by a user in the TS under the control of the microprocessor 124.

The audio stream is applied to the audio decoder 110 to restore audio data, and 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 to restore the video data, and the annoying video data is applied to the OSG (On Screen Graphic) mixer 118 to provide OSG data under the control of the microprocessor 124. Combined and processed by the image processing output unit 120 is applied to the water pipe 122 as a video signal.

The microprocessor 124 performs an operation according to a command input from a keypad 128 or an IR remote controller 130 through a user interface 134. Follow the program stored in). In this case, the command applied from the IR remote controller 130 is received by the IR receiver 132 as an IR signal and applied to the user interface 134. The microprocessor 124 is then supplied with additional data from the TS decoder 108.

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.

Referring to FIG. 2, which shows a process flow chart according to a preferred embodiment of the present invention applicable to the HDTV as described above, in step 136, the microprocessor 124 allows a user to input the keypad 128 to the IR remote controller 130. If command to switch the channel using the (step 138), otherwise performs the step (140). The channel switching command is a channel switching to any one of a plurality of digital channels belonging to a high frequency channel to which the digital channel viewed previously belongs. In step 138, the microprocessor 124 outputs audio and video of the program of the digital channel selected by the user and ends.

Here, the operation of the microprocessor 124 will be described in more detail with reference to FIG. 3, which shows a hierarchical configuration diagram of the transport packet. The microprocessor 124 searches for the program of the corresponding digital channel in response to the channel change command of the user. The microprocessor 124 controls the TS decoder 108 to selectively output audio and video transport packets corresponding to the program. The TS decoder 108 retrieves packet identification information of the transport packets output from the channel decoder 106 to identify which program is the video or audio transport packet, and the transport packets According to the control of the microprocessor 124, only the audio and video transport packets of the program of the digital channel selected by the user are taken out and output.

The audio transport packet output from the TS decoder 108 is output as audio through an audio decoder 110 and an audio processor 112, and the video transport packet is a video decoder 116, an OSG mixer 118, The image processing output unit 120 is output to the water pipe 112 as an image.

In step 140, the microprocessor 124 performs step 142 when the user commands the audio switching using the keypad 128 to the IR remote controller 130, and otherwise performs step 144. . Here, the keypad 128 to the IR remote controller 130 may be further provided with a key for switching only the audio to another digital channel.

The audio transition refers to the conversion of a video output to a program of a digital channel other than audio while maintaining the video of a previous program. The audio transition allows a user to search for audio of a program being broadcast on another digital channel. Can be.

In step 140, the microprocessor 124 controls the TS decoder 108 to output program audio of a channel selected by the user. The TS decoder 108 selects and outputs an audio transport packet of a program of a channel selected by the user under the control of the microprocessor 124, and accordingly, the program audio of the channel selected by the user is output.

In this case, the water pipe 122 outputs an image of a program previously viewed by the user, and the speaker 114 outputs audio of a program selected by the user in step 140.

In step 144, the microprocessor 124 performs step 146 when the user commands video switching using the keypad 128 or the IR remote controller 130. Otherwise, the microprocessor 124 proceeds to step 148. Perform the action. Here, the keypad 128 to the IR remote controller 130 may be further provided with a key for switching only the video to another digital channel.

The video transition refers to the conversion of an audio output to a program of a digital channel other than video only while maintaining the audio of a previous program. The video transition allows a user to search for a video of a program that is being broadcast on another digital channel. Can be.

In step 146, the microprocessor 124 controls the TS decoder 108 to output the program video of the channel selected by the user. The TS decoder 108 selects and outputs a video transport packet of a program of a channel selected by the user under the control of the microprocessor 124, and accordingly, a video of the program of the channel selected by the user is output.

In this case, the speaker 114 outputs audio of a program previously viewed by the user, and the video of the program selected by the user in step 144 is output to the receiving tube 122.

As described above, the present invention allows a user to individually switch between audio and video of a digital channel belonging to one high frequency channel. As a result, the user may continue to watch video and search only audio of another channel, whereas the user may continue to listen to audio and search only video of another channel.

As described above, according to the present invention, when the channel is searched, the video can be searched by switching only the audio while maintaining the channel previously watched, and on the contrary, the audio can be channeled by only the video while maintaining the previously watched channel. When switching channels, it is convenient to know the progress of the program being watched before.

Claims (3)

In a video channel switching method in a multi-channel television receiver, In a transport packet in which audio and video transport packets of a plurality of digital channels are mixed, an audio transport packet of a first digital channel which is one of the plurality of digital channels and a second digital channel which is one of the plurality of digital channels. Reproducing and outputting a video transport packet; During playback of the audio and video transport packets, searching whether a user commands playback output of a video transport packet of a third digital channel, which is one of the plurality of digital channels; When the user instructs the reproduction output of the video transport packet of the third digital channel, the audio transport packet of the digital channel being reproduced and output is continuously reproduced and output, and the video transport packet is output of the third digital channel. And reproducing and outputting a video transport packet. A method of switching audio channels in a multichannel television receiver, In a transport packet in which audio and video transport packets of a plurality of digital channels are mixed, an audio transport packet of a first digital channel which is one of the plurality of digital channels and a second digital channel which is one of the plurality of digital channels. Reproducing and outputting a video transport packet; While reproducing the audio and video transport packet, searching whether a user commands the reproducing output of an audio transport packet of a third digital channel which is one of the plurality of digital channels; When the user instructs the reproduction output of the audio transport packet of the third digital channel, the video transport packet of the digital channel being reproduced and output is continuously reproduced and output, and the audio transport packet of the third digital channel is output. And reproducing and outputting an audio transport packet. A method of switching video and audio channels in a multichannel television receiver, In a transport packet in which audio and video transport packets of a plurality of digital channels are mixed, an audio transport packet of a first digital channel which is one of the plurality of digital channels and a second digital channel which is one of the plurality of digital channels. Reproducing and outputting a video transport packet; During playback of the audio and video transport packets, searching whether a user commands playback output of a video transport packet of a third digital channel, which is one of the plurality of digital channels; When the user instructs the reproduction output of the video transport packet of the third digital channel, the audio transport packet of the digital channel being reproduced and output is continuously reproduced and output, and the video transport packet is output of the third digital channel. Reproducing and outputting a video transport packet; While reproducing the audio and video transport packet, searching whether a user commands the reproducing output of an audio transport packet of a fourth digital channel, which is one of the plurality of digital channels; When the user instructs the reproduction output of the audio transport packet of the fourth digital channel, the video transport packet of the digital channel being reproduced and output is continuously reproduced and output, and the audio transport packet of the fourth digital channel is output. And reproducing and outputting an audio transport packet.

Images