KR20000040870A - Method for selecting channel in line mode of television - Google Patents

Abstract

PURPOSE: A method for selecting channels in line mode of television is provided to select channels according to the type of exterior device. CONSTITUTION: A method for selecting channels in line mode of television includes first thru third steps. The method selects channels according to the signal of a line input node. At the first step, the type of exterior device coupled with the line input node is determined when a channel select key input is applied in the line mode. At the second step, television mode is selected when the type of the exterior device is a pay channel decoder and the received broadcasting signal is processed. At the third step, the signal applied at the line input node is processed and a channel corresponding to the channel select key input is outputted to a line output node when the type of the exterior device is not a pay channel decoder.

Description

A channel changing method on A / V mode of a television

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel switching method in a line (AV: Audio and Visual) mode of a television. In particular, a channel up / down is performed in a line mode in which an external device is connected to a line input terminal to process a signal applied to the external device. The present invention relates to a channel switching method in a line mode of a television, which has a key input for determining a type of an external device and adaptively performing channel switching.

In general, external devices such as a video cassette recorder, a game machine, a cable or satellite converter, and a pay TV decoder are connected to a line input terminal (AV terminal) of a TV. By switching to the line mode, a signal from the line input terminal is selected to output the processed video and audio signals through the CRT and the speaker so that the user can watch the video and audio signals from an external device.

On the other hand, the converter of the pay broadcasting restores the broadcast signal from the pay broadcasting station which scrambling and transmits the broadcast signal to prevent viewing of the pay broadcasting program indiscriminately by non-subscribers. As a means for outputting a signal, a pay TV signal, which is normally tuned to a specific pay channel and received from a tuner of the TV, is restored and applied to the line input terminal of the TV so that the pay TV can be watched. do.

On the other hand, when the external device as described above is connected and watched through the line input terminal, and the channel is switched by using a key input means such as a remote control of the television, the channel mode is switched from the line mode to the television mode, and the user's channel switching request is The tuner is tuned to the corresponding channel to process the received broadcast signal.

In addition, in the TV mode, a signal of an external device applied from a line input terminal may be processed and output through a CRT and a speaker while outputting a broadcast signal of a predetermined channel tuned by a tuner of the built-in TV to the line output terminal. .

Therefore, by connecting an external device such as a video cassette recorder or a computer through the line output terminal of the television to view broadcast signals received from the tuner of the television, or recording and editing operations, For example, the game can be connected to the game machine.

On the other hand, in the above-described line mode, when the pay-TV decoder is watching pay-TV through the line input terminal, the viewer operates the channel up / down key to stop watching the pay-TV and watch the broadcast program of another broadcast channel. Then, the TV controls the tuner to process and tune the received broadcast signal by switching and tuning from the currently tuned pay channel to the channel corresponding to the key input, but in the above-described line mode, game video and audio applied from the line input terminal. When the tuner outputs the tuned broadcast signal from the tuner to the external device, when a predetermined channel switching key signal for channel up / down is applied, the television switches to the television mode and switches the channel of its own tuner to the CRT and Output to the speaker, output to the line output terminal, The viewer using the game image and sound from the jacks had the inconvenient that have to switch the television back to the line mode.

Accordingly, in the present invention, if there is a channel switching key input in the line mode of a television, a method for providing convenience to a user by adaptively switching channels corresponding to the type of external device currently connected to the line input terminal is provided. I would like to present.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide an external device connected to a line input terminal when a channel switching request is received in a line mode in which a signal from an external device is received through a line input terminal in a television. In case of a pay broadcasting decoder that does not have its own tuner by determining the type of the device, it switches to TV mode and performs channel switching in response to a user's channel switching request. The present invention provides a channel switching method in a line mode of a television that converts a channel of a signal output to a line output terminal of a television into a channel corresponding to a channel switching request of a user and outputs the same, thereby providing convenience to the user.

1 is a block diagram of a television employed in accordance with the present invention.

2 is a flowchart illustrating a channel switching process in the line mode of a television according to the present invention.

Explanation of symbols for the main parts of the drawings

10: key input unit 20: microcomputer

30: tuner unit 40: input switching unit

50: video and audio signal processing unit 60: CRT

70: speaker

A channel switching method in the line mode of a television according to the present invention is a method of performing channel switching in a line mode in which an external device is connected to a line input terminal in a television to select and process a signal from the line input terminal. Determining the type of the external device connected to the line input terminal in the case of the channel switching key in the step, and if the determined external device is the pay broadcasting decoder, switching from the line mode to the TV mode and switching the channel in response to the channel switching key input. Processing the received broadcast signal, and processing the signal applied through the line input terminal in the line mode state if the determined external device is not a pay broadcast decoder, and is tuned to the channel corresponding to the channel switching key input to receive the broadcast. Outputting a signal to a line output terminal; The bags feature.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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 television employed in accordance with the present invention, which includes a key input unit 10, a microcomputer 20, a tuner unit 30, an input switching unit 40, a video and audio signal processing unit 50, and a monitor. 60 and a speaker 70.

In such a configuration, the key input unit 10 uses a plurality of keys including a line switching mode for performing an operation of a television or a mode switching key for switching to a television mode, a channel switching key for up / down switching of a channel, and the like. And outputs a key signal corresponding to a user's key operation, and typically transmits / receives a key signal on a predetermined infrared carrier using a remote controller that can be input from a remote location, and applies it to the microcomputer 20 described later.

The microcomputer 20 selectively controls the tuner 30, the input switching unit 40, and the video and audio signal processing unit 50 based on the key signal from the key input unit 10 to control the overall operation of the television. And a TV mode in which the broadcast signal from the tuner unit 30 is the input source or a line mode (AV mode) in which the line input terminal AV Line is the input source, or the like, based on the mode switching key signal from the key input unit 10. The input switching unit 40 is selected by switching control. In particular, when a key signal for channel switching is applied from the key input unit 10 during the line mode, it is determined whether the external device connected to the line input terminal is a pay broadcast decoder. In the case of a broadcast decoder, the input switching unit 40 is switched to control the TV mode, and the tuner unit 30 is controlled to tune to a channel corresponding to the channel switching key input. While maintaining the mode, the tuner unit 30 is controlled so that the broadcast signal received by being tuned to the channel corresponding to the channel switching key input is output through the line output terminal.

Meanwhile, the tuner unit 30 outputs a broadcast signal received by being tuned to a corresponding channel corresponding to the control of the microcomputer 20.

In addition, the input switching unit 40 selectively outputs and switches the line input terminal or the tuner unit 30 based on the switching control of the microcomputer 20, and outputs a signal applied from the line input terminal or the tuner unit 30. The line output terminal outputs a broadcast signal, that is, an intermediate frequency signal, which is tuned and output from the tuner unit 30.

Meanwhile, the video and audio signal processing unit 50 processes the video and audio signals applied from the input switching unit 40 into signals that can be displayed and output, respectively, under the control of the microcomputer 20, thereby processing the CRT 60 and the speaker. Output each to 70.

Next, a detailed description will be given with reference to the flowchart of FIG. 2 attached to a channel switching process in the line mode according to the present invention in a television including the above-described configuration unit.

First, the user connects the output from the external device to the line input terminal, and switches the television to the line mode by operating the mode switching key provided in the key input unit 10.

Then, the microcomputer 20 switches and controls the input switching unit 40 based on the mode switching key signal from the key input unit 10 so that the signal applied from the line input terminal is applied to the video and audio signal processing unit 50. By controlling the video and audio from the external device is output through the CRT 60 and the speaker 70, the user can watch the external device as an input source.

On the other hand, the microcomputer 20 determines whether a key signal for channel switching is applied from the key input unit 10, that is, in the line mode state (step 200) (step 202).

If a key signal for channel switching is applied from the key input unit 10, the microcomputer 20 searches for the type of external device connected to the line input terminal (step 204).

At this time, the search result detects whether the external device is a pay broadcast decoder (step 206). If the external device is a pay broadcast decoder, that is, the tuner 30 tunes and tunes a channel preset as a pay broadcast channel. The broadcast signal is transmitted to the pay broadcast decoder through the line output terminal, and when the pay broadcast signal received from the tuner unit 30 of the TV is applied, the pay broadcast decoder restores the applied broadcast signal to a displayable original signal and then again. The tuner 30 determines that the pay channel is being tuned by the tuner unit 30 to determine whether it is connected to the line input terminal.

Accordingly, if the external device connected to the search result line input terminal is the pay broadcast decoder (step 206), the microcomputer 20 switches and controls the input switching unit 40 to receive the broadcast received from the tuner unit 30. A signal is converted to a television mode to be applied to the video and audio signal processing unit 50, and the tuner unit 30 is controlled to tune to a channel corresponding to a user's channel switching key input to process a received broadcast signal to process a CRT ( 60) and output to the speaker 70 (step 208), so that other broadcast programs can be watched.

On the contrary, if the external device connected to the line input terminal is not a pay broadcast decoder, the microcomputer 20 maintains the line mode, that is, processes the signal of the external device applied from the line input terminal to process the CRT 60 and the speaker 70. While outputting through, the tuner unit 30 is controlled to tune to a channel corresponding to the user's channel switching key input so that the broadcast signal received on the changed channel is output to the line output terminal (step 210).

Therefore, while watching the video and audio output through the external device connected to the line input terminal of the television outputs the broadcast signal received on the channel changed to the line output terminal, the video signal input from another external device connected to the line output terminal You can select to watch or to record and edit.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, if there is a channel switching selection key input during the line mode in the television, the input source of the line mode selectively switches the channel according to the type of the external device, that is, in the television mode to the channel desired by the user. By tuning and processing, or by switching only the broadcast signal output to the line output terminal and outputting it, there is an effect that can provide convenience of mode switching and channel switching to the user.

Claims (1)

A method for performing channel switching in a line mode in which an external device is connected to a line input terminal in a television to select and process a signal from the line input terminal. Determining a type of an external device connected to the line input terminal when there is a channel switch key input in the line mode; If the determined external device is a pay broadcast decoder, switching from a line mode to a television mode and switching and tuning a channel in response to a channel change key input to process a received broadcast signal; If the determined external device is not a pay broadcast decoder, processing a signal applied through a line input terminal in a line mode state and tuning to a channel corresponding to a channel switch key input to output a received broadcast signal to a line output terminal; A channel switching method in line mode of a television.