KR19990001202A - Television receiver with channel search function using only screen change - Google Patents

Abstract

According to the present invention, when a user attempts to switch channels while watching a broadcast program of a certain channel, only the screen change is provided so that the user can search the channel by converting only the output screen of the channel to be switched while maintaining the audio signal of the first channel as it is. A television receiver having a channel search function used.

According to the present invention, when a predetermined channel search function key is selected while a broadcast signal through the first tuner is reproduced in a television receiver having a two-tuner, an arbitrary channel is selected, the second channel is based on the corresponding channel data. By tuning and controlling the tuner, the audio signal tuned and output through the first tuner and the video signal tuned and output through the second tuner are output to the audio and video processor, respectively.

Thus, the voice of the program being watched can be searched while searching for another broadcast channel.

Description

Television receiver with channel search function using only screen change

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and in particular, when a user attempts to switch channels while watching a broadcast program of an arbitrary channel, the user can search for a channel by converting only the output screen of the switched channel while maintaining the audio signal of the first channel. The present invention relates to a television receiver having a channel search function using only screen switching.

At present, television receivers are very closely related to modern life. In other words, most modern people accept a lot of information through television receivers, and many people spend much of their spare time watching programs.

On the other hand, while currently watching a broadcast program to search for a program that is broadcast on another channel to try to switch the channel using a predetermined channel switching means. However, if the channel switching is attempted and the audio and video of the program of the channel switching channel is outputted, the audio and video of the previous channel is not heard or viewed. If you were watching the program, it could happen that the attempt to switch channels would be meaningless.

Accordingly, the present invention was created in view of the above circumstances, and when a user attempts to switch channels while watching a broadcast program of an arbitrary channel, the user changes only the output screen of the channel to be switched while maintaining the audio signal of the first channel as it is. It is an object of the present invention to provide a television receiver having a channel search function using only screen switching to allow a user to search a channel.

1 is a block diagram showing the internal configuration of a television receiver having a channel search function using only screen switching according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the device in the configuration of FIG.

* Explanation of symbols for main parts of the drawings

1: antenna 2: first tuner

3: first audio IF processor 4: first image IF processor

5: second tuner 6: second audio IF processing section

7: second image IF processor 8: remote controller

9 receiver 10 microprocessor

11: A / V switching unit 12: first audio processing unit

13 speaker 14 second speech processing unit

15: PIP processing unit 16: image processing unit

17: CRT drive unit 18: CRT

19: channel memory 20: program storage

21: timer 22: state storage unit

8a: Channel Search Function Key 8b: Function Release Key

A television receiver having a channel search function using only screen switching according to the present invention for realizing the above object switches the first and second tuners for tuning the main and sub broadcast signals, respectively, and the broadcast signals tuned and input from the tuner. A television receiver having an A / V switching unit for outputting a signal and an audio and video processing unit for processing and outputting audio and video signals, respectively; A channel search function key for selecting an image channel search mode for performing channel search while switching only the output image, and selecting a channel after the channel search function key is selected while the broadcast signal through the first tuner is being reproduced. And tune the second tuner based on the channel data so that the audio signal tuned and output through the first tuner and the video signal tuned and output through the second tuner are output to the audio and image processor, respectively. It characterized in that it comprises a control unit for switching control of the A / V switching unit.

The present invention may further include a timer that counts a predetermined time and outputs a predetermined counting result signal when the predetermined time is counted. The control unit includes a voice signal that is tuned and output through a first tuner; The A / V switching unit controls switching and simultaneously counts the timer so that the video signal selected and output through the second tuner is output to the audio and image processing unit, and when the predetermined count result signal is received, the second tuner And tuning the first tuner based on the tuning data.

The present invention may further comprise a function release key for releasing the video channel search mode, wherein the control unit counts the timer to wait for input of a count result signal, and then the function release key is inputted. And tuning the first tuner immediately based on the tuning data of the second tuner.

That is, according to the above, it is possible to search for another broadcast channel while continuing to listen to the voice of the program being watched.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

1 is a block diagram showing an internal configuration of a television receiver having a channel search function using only screen switching according to an embodiment of the present invention.

In the drawing, reference numeral 1 denotes an antenna for receiving an over-the-air broadcast signal, 2 denotes a first tuner for executing channel selection according to a main broadcast signal according to a control signal of the microprocessor 10, which will be described later. A first audio IF processor for amplifying and detecting a voice signal of a channel tuned by the first tuner 2 and outputting a voice intermediate frequency signal SIF; and 4 amplifying and outputting the video signal output from the first tuner 2; A first image IF processor for detecting and outputting an image intermediate frequency signal PIF.

Further, reference numeral 5 denotes a second tuner for executing broadcast tuning for the sub-broadcast signal according to the control signal of the microprocessor 10, which will be described later, and 6 and 7 are channels tuned by the second tuner 5. And a second audio IF processor and a second video IF processor for amplifying and detecting audio and video signals and outputting audio and video intermediate frequency signals, respectively.

Next, reference numeral 8 is a remote control device for the user to adjust the output volume, channel switching and mode switching, or remotely control the overall device, the remote control device 8 is particularly outputting the audio signal of the currently tuned channel as it is. The channel search function key 8a for selecting a channel search function for switching the output screen to a video signal of another channel and selecting a channel search function to cancel the function of the channel search function key 8a. 9 is a receiving unit for receiving an infrared signal transmitted from the remote control device 8 and converting it into an electrical signal, and 10 is inputted from the receiving unit 9. It is a microprocessor that controls the whole device in accordance with a contracted code signal.

In addition, reference numeral 11 denotes from the first audio and video IF processor 3 and 4, the second audio and video IF processor 6 and 7 and an external A / V device according to the control signal of the microprocessor 10. FIG. An A / V switching unit 11 for switching and outputting the input video and audio signals.

On the other hand, reference numerals 12 and 14 are not shown for the main or sub-audio signals respectively output from the A / V switching unit 11, but bass, treble according to the control signal from the microprocessor 10 (Treble), the first and second audio processing unit for processing the volume control and output to the speaker 13 or headphones, 15 is the A / V switching unit 11 in accordance with the control signal of the microprocessor 10 PIP processing unit for performing the sub-screen processing for the main and sub-image signal output from the output, 16 is the A / V switching unit 11 or PIP processing unit 15 in accordance with the control signal of the microprocessor 10 The brightness, tint, and color adjustments are performed on the video signal outputted from and inputted to correspond to R (Red), G (Green), B (Blue), and luminance (-Y). An image processor for outputting a signal; A CRT driving section for driving the CRT 18 connected to the rear stage based on the R, G, B and luminance (-Y) signals outputted from the apparatus.

In addition, reference numeral 19 is a channel memory for storing predetermined channel data, 20 is a program memory for storing an operation program of the microprocessor 10, and 21 is a predetermined time under the control of the microprocessor 10. When the counting is completed, the timer 22 outputs a predetermined counting completion signal, and 22 switches only the output screen designated as the channel search function key 8a is input according to the control signal of the microprocessor 10. A state storage unit stores a channel search operation mode for performing channel search as predetermined flag data.

Next, the operation of the device having the above configuration will be described.

First, when the power is turned on by the user, the microprocessor 10 tunes and controls the first tuner 2 based on predetermined channel data stored in the channel memory 19. Subsequently, the broadcast signal tuned by the first tuner 2 is subjected to video IF processing and audio IF processing, respectively, to be input to the A / V switching unit 11, so that the microprocessor 10 performs this A / V switching. The switching unit 11 controls the output of the video signal to the image processor 16 and the output of the audio signal to the first audio processor 12. On the other hand, when the user selects the PIP function, the microprocessor 10 tunes and controls the second tuner 5 based on predetermined channel data, and the broadcast signal tuned by the second tuner 5 The intermediate frequency signal is converted and output to the A / V switching unit 11. The microprocessor 10 controls the A / V switching unit 11 to output the video signal to the PIP processor 15 and to output the audio signal to the second audio processor 14.

Meanwhile, as described above, the broadcast signal tuned through the first tuner 2 is processed through audio and video through the first audio processing unit 12 and the image processing unit 16 to be output to the speaker 13 and the CRT 18. (Step ST1), when the channel search function key 8a is input (step ST2), the microprocessor 10 switches the state storage unit 22, for example, by switching only the output screen to search for channels. Recording is performed as predetermined flag data according to the mode (ST3 step).

Subsequently, the microprocessor 10 waits for input of a predetermined channel selection signal through a channel up-down key (not shown) for setting channel switching (step ST4), so that the channel selection signal is not input for a predetermined time. If so, the microprocessor 10 releases the channel search mode by recording the state flag of the state storage unit 22 as predetermined flag data according to the release of the channel search mode (steps ST5 and ST6).

On the other hand, if a predetermined channel selection signal is input before a predetermined time elapses in the step ST4, the microprocessor 10 reads the channel data corresponding to the channel selection signal from the channel memory 19 and the second signal. The tuner 5 is tuned and controlled (step ST7). Subsequently, the broadcast signal tuned by the second tuner 5 is converted into an intermediate frequency signal and inputted to the A / V switching unit 11. In this case, the microprocessor 10 is connected to the A / V switching unit. Switching control of the (11) to control the audio signal that was being output to the first voice processing unit 12 is still output, while the voice signal of the broadcast signal input through the second tuner (5) is cut off the output The video signal, which is being output to the first image processor 16, is blocked, and the image signal selected and input through the second tuner 5 is controlled to be output to the image processor 16 (step ST8). That is, the first audio signal is output as it is, and the video signal is converted into the newly selected video signal.

As described above, the video signal selected and inputted through the second tuner 5 is output-controlled by the image processing unit 16, and the drive is controlled by the timer 21 to control the predetermined coefficient from the timer 21. It is searched whether a result signal is input or a channel selection signal is input (steps ST9 and ST10), through a channel up-down key (not shown) until a predetermined counting result signal is received from the timer 21. When the predetermined channel selection signal is not input, the microprocessor 10 stops the tuning operation of the second tuner 5 and at the same time the first tuner 2 based on the channel data of the channel on which the current video signal is output. Tune and control the audio and video processing based on the broadcast signal tuned through the first tuner 2 so as to be output to the speaker 13 and the CRT 18, respectively (ST11). Then, the microprocessor 10 records the state data of the state storage unit 22 by switching from the channel search mode to the release mode. On the other hand, if the function release key 8b is input before the predetermined counting result signal is input from the timer 21 in step ST9, the microprocessor 10 proceeds to step ST11 to combine the audio signal and the video signal. Tuning control of the first tuner 2 is performed.

On the other hand, if a predetermined channel selection signal is received before the predetermined counting result signal is received from the timer 21 in step ST10, the microprocessor 10 proceeds to step ST7 to perform the following operations. do.

That is, according to the embodiment, it is possible to search for another broadcast channel while continuously listening to the voice of the program being watched.

On the other hand, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the technical gist of the present invention.

As described above, according to the present invention, when a user attempts to switch channels while watching a broadcast program of an arbitrary channel, the user can search for a channel by switching only the output screen of the channel while maintaining the audio signal of the first channel. The state can realize a television receiver having a channel search function using only screen switching.

Claims (4)

First and second tuners 2 and 5 for tuning the main and sub broadcast signals, and an A / V switching unit 11 for switching and outputting a broadcast signal tuned and input from the tuners 2 and 5; A television receiver having an audio and video processing unit (12, 16) for processing and outputting audio and video signals, respectively; A channel search function key 8a for selecting an image channel search mode for performing channel search while switching only the output image; If an arbitrary channel is selected after the channel search function key 8a is selected while the broadcast signal through the first tuner 2 is being reproduced, the second tuner 5 is tuned based on the corresponding channel data. The A / V is output such that the audio signal tuned and output through the first tuner 2 and the video signal tuned and output through the second tuner 5 are output to the audio and video processing units 12 and 16, respectively. Television receiver having a channel search function using only screen switching, characterized in that it comprises a control unit 10 for switching control of the switching unit (11). The method of claim 1, further comprising a timer 21 that counts a predetermined time and outputs a predetermined counting result signal when the predetermined time is counted. The controller 10 outputs the audio signal tuned and output through the first tuner 2 and the video signal tuned and output through the second tuner 5 to the audio and video processor 12 and 16, respectively. Switching control of the / V switching unit 11 and counting control of the timer 21, and when a predetermined counting result signal is received, the first tuner (1) is based on the tuning data of the second tuner 5. 2) A television receiver having a channel search function using only screen switching, characterized by tuning control. The method of claim 2, wherein the control unit 10 controls the timer 21 so that the channel selection signal is input before the counting result signal is input from the timer 21. The tuner 5 is tuned and controlled so that the audio signal tuned and output through the first tuner 2 and the video signal tuned and output through the second tuner 5 are audio and video processing units 12 and 16, respectively. And the channel search function using only the screen switching, wherein the A / V switching unit 11 is switched and controlled, and the timer 21 is initialized and counted again. 4. The apparatus according to claim 2 or 3, further comprising a function release key (8b) for releasing the video channel search mode. The controller 10 counts the timer 21 and waits for the input of the counting result signal. When the function release key 8b is input, the controller 10 immediately adjusts the second data based on the tuning data of the second tuner 5. A television receiver having a channel search function using only screen switching, characterized in that one tuner (2) is tuned and controlled.