KR19990016808U - Video and Audio Signal Switching Device - Google Patents

Abstract

The present invention relates to a video and audio signal switching device for switching the video and audio signals transmitted so that the TV set can receive the video and audio signals output from the set-top other than the Internet set-top in the Internet TV environment. To this end, the video and audio signal switching device according to the present invention is controlled by a control signal transmitted through the printer port of the Internet set-top to select one of the audio signal output from the Internet set-top and the audio signal output from at least one other set-top A first multiplexer for transmitting to an audio terminal of a television set, a control signal transmitted through a printer port of an Internet set-top, and selecting one of a video signal output from the Internet set-top and a video signal output from at least one other set-top And a second multiplexer for transmitting to the video terminal of the television set. Therefore, in the Internet TV environment, video and audio signals output from other set-tops can be easily output through a television set.

Description

Video and Audio Signal Switching Device

The present invention relates to an Internet TV in which an Internet settop and a TV set are connected. In particular, the TV set can receive video and audio signals output from a set-top device other than the Internet set-top while the Internet is in use. The present invention relates to a device for switching video and audio signals.

The Internet is a network of computer networks that exchange data in accordance with a communication protocol called Transmission Control Protocol / Internet Protocol (TCP / IP). The Internet set-top is an Internet-only module configured to use such an Internet, and the Internet TV is a device that is realized by connecting the Internet set-top to an existing TV set. This Internet TV is a system that searches the Internet through an existing TV and outputs the searched results on a TV screen, which has the advantage of easy Internet access with only basic configuration.

However, since the television set is provided with one video and audio input terminal, each video and audio signal output from another set top cannot be received while being connected to the video and audio output terminals provided in the Internet-only module. For this reason, in order to transmit video and audio signals output from another set-top to a television set, the Internet TV environment must be abandoned. This is possible by unplugging the video and audio terminals between the Internet set-top and the television set, and plugging in the audio and video terminals between the television set and the other set-top. Therefore, in a new environment other than the Internet TV environment, the television set receives video and audio signals output from other set tops.

The present invention has been made to solve the above-mentioned shortcomings. The present invention provides a video and audio switching system for switching video and audio signals so that a TV set can receive video and audio signals output from another set-top other than the Internet set-top in an Internet TV environment. It is an object of the present invention to provide an audio signal switching device.

In order to achieve the above object, a video and audio signal switching device according to the present invention is an Internet television system in which a television set and an Internet set-top are connected, the audio signal output from the Internet set-top and the audio signal output from at least one or more set-tops. A first multiplexer for selecting one and transmitting the selected one to an audio terminal provided in the television set; A second multiplexer for selecting one of the video signal output from the Internet set-top and the video signal output from at least one other set-top, and transmitting the selected video signal to a video terminal provided in the television set; When the user requests that video and audio signals output from the Internet set-top be transmitted to the television set, the video and audio signals output from the Internet set-top are selected and controlled to be transmitted, and the user selects from at least one set-top of the at least A microprocessor provided in the Internet set-top for controlling video and audio signals outputted from a predetermined set-top to be selected and transmitted when requesting output video and audio signals to be transmitted to a television set; A printer port provided in the Internet set-top; And a controller controlled by the microprocessor to output a signal for controlling the selection operation of the first multiplexer and the second multiplexer through the printer port.

1 is a block diagram of a system to which a video and audio signal switching device according to the present invention is applied.

<Description of Symbols for Main Parts of Drawings>

100: Internet set-top 101: key input processing unit

102: microprocessor 103: sound digital to analog converter

104, 111, 131: Audio terminal 105: Encoder

106, 112, 132: Video terminal 107: Controller

108: printer port 110: video and audio signal processing system

120: first multiplexer 121: second multiplexer

130: TV set

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

1 is a block diagram of a system to which a video and audio signal switching device according to the present invention is applied, the Internet having one audio terminal 104 for outputting an audio signal and one video terminal 106 for outputting a video signal. Set-top 100, a television set 130 having one audio terminal 131 for receiving an audio signal and one video terminal 132 for receiving a video signal, and one audio terminal 111 for outputting an audio signal Video signal and audio signal processing system 110 corresponding to another set-top having one video terminal 112 for outputting a video signal, and a control signal transmitted through the printer port 108 of the Internet set-top 100. Audio signals output from the audio terminal 104 of the Internet set-top 100 and the audio terminal 111 of the video and audio signal processing system 110 are selectively provided to the audio terminal 131 of the television set 130. The first multiplexer 120 to transmit the video terminal 106 and the video and audio signal processing system 110 of the Internet set-top 100 by a control signal transmitted through the print port 108 of the Internet set-top 100 And a second multiplexer 121 for selectively transmitting the video signal output from the video terminal 112 to the video terminal 132 of the television set 130.

In particular, the Internet set-top 100 shown in FIG. 1 converts key data applied from the outside of the audio terminal 104, the video terminal 106, and the printer port 108 into coded information according to a predetermined rule and transmits the converted data. The microprocessor 102 and the microprocessor 102 controlling the Internet set-top 100 to perform the corresponding function by analyzing the code information transmitted from the key input processing unit 101 and the key input processing unit 101 A sound digital / analog converter (hereinafter referred to as a DAC) that converts an audio signal output from the controller 107 and the microprocessor 102 that controls the state of the printer port 108 by an signal into an analog signal and transmits it to the audio terminal 104. 103, and the video signal transmitted from the microprocessor 102 to the video terminal 106 by coding in a broadcast method used in the television set 130 It is configured to include an encoder 105 for transmitting.

The video and audio signal processing system 110 is configured to process video and audio signals, such as a video cassette recorder, and output the same in the form of a signal that can be accommodated in the television set 130.

The system shown in FIG. 1 configured as described above operates as follows.

First, the main operation mode is a structure in which the Internet set-top 100 and the television set 130 are connected to transmit video and audio signals. In the sub-operation mode, another set-top 110 and the television set 130 are connected to the video and audio signals. Defined as a structure for transmitting audio signals.

When the main operation mode is requested by the user's command, the microprocessor 102 of the Internet set-top 100 includes an audio terminal having a first multiplexer 120 and a second multiplexer 121 provided in the Internet set-top 100. The operation of the controller 107 is controlled to select the audio and video signals output through the 104 and the video terminal 106 and transmit them to the audio terminal 131 and the video terminal 132 of the television set 130.

Accordingly, the controller 107 outputs a corresponding selection control signal to the first multiplexer 120 and the second multiplexer 121 through the printer port 108. In this case, when the printer port 100 is configured with 8 pins, the controller 107 controls the printer port 108 such that data of '0000 0000' is output as the selection control signal.

The sound DAC 103 converts the multimedia hypertext signal outputted from the microprocessor 102 into an analog audio signal and transmits the analog DAC signal to the first multiplexer 102 through the audio terminal 104 as in the related art. The RGB video signal output from the microprocessor 102 is encoded to be suitable for the broadcasting system set in the television set 130 and transmitted to the second multiplexer 121 through the video terminal 106. At this time, when the broadcasting system set in the television set 130 is NTSC, the encoder 105 converts the video signal suitable for the NTSC system and transmits it to the video terminal 106.

Meanwhile, the audio signal processed in the form of a signal suitable for the television set 130 in the predetermined video and audio signal processing system 110 is transmitted to the first multiplexer 120 through the corresponding audio terminal 111. The signal is transmitted to the second multiplexer 121 through the corresponding video terminal 112.

As such, when the corresponding video and audio signals are applied from the Internet set-top 100 and / or another set-top video and audio signal processing system 110, the first multiplexer 120 and the second multiplexer 121 are connected to the printer port. The video and audio signals transmitted from the Internet set-top 100 are selected by the same selection control signal '0000 0000' provided from 108 to the audio terminal 131 and the video terminal 132 of the television set 130. send.

However, when key data requiring the sub operation mode described above is applied by the user, the microprocessor 102 transmits a control command for performing the sub operation mode to the controller 107. Accordingly, the controller 107 controls the printer port 108 to output the '1111 1111' information. The above-described '0000 0000' and '1111 1111' information output through the printer port 108 may be set to different values for the convenience of description because the above-described operation mode is operated by being divided into the main operation mode and the sub operation mode. Can be.

The first multiplexer 120 and the second multiplexer 121 select the audio and video signals transmitted from the video and audio signal processing system 110 when the '1111 1111' information is transmitted from the printer port 108. It is transmitted to the audio terminal 131 and the video terminal 132 of 130.

In the above-described embodiment, a structure for selectively transmitting video and audio signals output from the Internet set-top 100 and the other set-top 110 to the television set 130 is illustrated, but may be output from the printer port 108. Since data can be represented by at least 8 bits, a structure for selectively transmitting video and audio signals output from 2 ⁸ set tops to the television set 130 can be implemented. In the case of implementing the structure in which 2 ⁸ set tops are connected as described above, the number of control signals output from the microprocessor 102 and the controller 107 should be set to 2 ⁸ in order to perform functions according to the present invention. In this case, the first multiplexer 120 and the second multiplexer 121 are configured to have 2 ⁸ input terminals.

As described above, the present invention is an audio and video terminal provided in a TV set while maintaining an Internet TV environment, and video and audio signals output from other set-tops other than the Internet set-top can be transmitted under the control of the Internet set-top. And by providing an audio signal switching device, not only can easily watch the video and audio signals output from the other set-top while using the Internet via the TV, but also has the effect of expanding the application range of the Internet TV.

Claims (2)

In an Internet television system in which a television set and an Internet set-top are connected, A first multiplexer for selecting one of an audio signal output from the Internet set-top and an audio signal output from at least one other set-top, and transmitting the selected audio signal to an audio terminal provided in the television set; A second multiplexer for selecting one of the video signal output from the Internet set-top and the video signal output from at least one other set-top, and transmitting the selected video signal to a video terminal included in the television set; If the user requests that the video and audio signals output from the Internet set-top be transmitted to the television set, the video and audio signals output from the Internet set-top are selected and controlled to be transmitted, and the user controls the at least one other The microprocessor provided in the Internet set-top which controls the video and audio signals outputted from the predetermined set-top to be transmitted to the television set when the video and audio signals outputted from the predetermined set-top of the set-top are selected and transmitted. ; A printer port provided in the Internet set-top; And And a controller controlled by the microprocessor to output a signal for controlling the selection operation of the first multiplexer and the second multiplexer through the printer port. The video and audio signal switching device of claim 1, wherein the other set top including the internet set top may be provided with a maximum of 2 ⁿ when the number of bits output through the printer port is n.