KR19980047377A - Broadcasting station search method of TV having broadcasting station search function - Google Patents

Abstract

The present invention relates to a method for searching a broadcasting station of a TV having a broadcasting station searching function. The method of determining whether a key for searching for a broadcasting station is selected through a remote controller, and if the key is input, initializes a buffer for storing information. Determining whether a key for designating each broadcasting station is selected; encoding information corresponding to each broadcasting station name in the buffer if the key is selected; determining whether to perform a broadcasting station search; ID is generated when the signal to search for a signal is stored in the buffer, and the step of searching for the completion of the search after searching the broadcasting station providing the current program, the ID if the search is completed And outputting the normalized broadcasting station information.

Description

Broadcasting station search method of TV having broadcasting station search function

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a warning sound generating function, and more particularly, to a television receiver having a warning sound generating function and a method for generating a warning sound when a user selects a key other than a predetermined key.

A typical television receiver receives and demodulates a broadcast signal transmitted from a broadcasting station and outputs it as a video signal and an audio signal through a CRT and a speaker. At this time, the OSD (ON SCREEN DISPLAY) function is used as a display function of a character or a picture. 1 is a block diagram illustrating a schematic configuration and function of a television receiver having a general OSD function.

In FIG. 1, reference numeral 101 denotes an antenna, 102 denotes an RF amplifying unit for amplifying a radio frequency signal (RF) received through the antenna 101, and 103 denotes an RF amplification unit. A first frequency outputting an intermediate frequency signal (hereinafter referred to as IF) by receiving and mixing the radio frequency signals output from the unit 102 and the oscillation frequency signals output from the local oscillation circuit 117 which will be described later. Indicates a mixer. Also, reference numeral 104 denotes an IF amplification unit for amplifying the intermediate frequency signal output from the first mixer 103, and 105 denotes an image intermediate frequency signal (PIF) in the intermediate frequency signal output from the IF amplifier 104. And a P / S separation unit such as a surface acoustic wave filter for separating the voice intermediate frequency signal SIF, and 106 denotes a voice signal from the voice intermediate frequency signal SIF output from the P / S separation unit 105. 107 denotes an audio detector for detecting an image signal from an image intermediate frequency signal PIF output from the P / S separation unit 105.

In addition, reference numeral 108 denotes a remote control device which allows the viewer to select a desired channel or to select each mode of the television, for example, a TV / AV mode, and 109 denotes an electrical signal of the infrared signal from the remote control device 108. A receiver converts a code signal, 110 denotes a channel memory in which predetermined channel data is stored, and 111 denotes a microprocessor that controls the entire system according to an input signal from the remote controller 108. In addition, reference numeral 112 denotes a screen display for overlapping and outputting a character or a picture, etc., on a screen on which a broadcast signal is output separately from the broadcast signal according to the control signal of the microprocessor 111 (hereinafter referred to as OSD). ) Denotes a PWM generator for generating a predetermined pulse width modulation (PWM) signal according to a control signal from the microprocessor 111, and 114 denotes the PWM generator ( An integrated circuit for integrating the PWM signal output from 113) and generating a predetermined level signal is shown.

At this time, if the viewer selects a predetermined channel using the remote control device 108, the microprocessor 111 reads out the channel data corresponding to the channel selected by the viewer from the channel memory 110, and then based on the selected channel. By controlling the PWM generator 113 to generate a predetermined PWM signal, the PWM signal is output as a voltage control signal corresponding to the channel selected by the viewer through the integration circuit 114 at this time. In addition, reference numeral 115 is provided for a precise tuning operation, and denotes an Auto Fine Tunning circuit (hereinafter referred to as AFT) circuit 115, and 116 is a voltage signal applied from the integrating circuit 114. An adder for adding a voltage signal applied from the AFT circuit 115 is shown, and 117 shows a local oscillating circuit for outputting a predetermined oscillation frequency.

At this time, the local oscillator circuit 117 generates a predetermined frequency signal according to the level of the voltage signal applied through the adder 116 and outputs it to the mixer 103 to execute broadcast tuning. In addition, the local oscillation circuit 117 is a local oscillation frequency that is output in accordance with the change in the ambient temperature or time elapses. However, if the local oscillation frequency is changed as described above, the intermediate frequency output from the mixer 103 is changed, thereby making it impossible to reproduce stable images. The AFT circuit 115 is provided to solve the above problem, which outputs the voltage signal (± ΔV) for the variation range Δf of the intermediate frequency to the adder 116 to the local oscillation circuit. This is to stabilize the local oscillation frequency output from 117. In addition, in the TV, the magnitude of the input signal received through the antenna 101 changes due to the strength or fluctuation of the received signal.

In addition, reference numeral 118 denotes the image detector 134 by controlling the amplification degree of the above-described RF amplifier 102 and the IF amplifier 104 based on the level of the image signal detected by the image detector 107. Auto Gain Control (hereinafter referred to as AGC) circuit which controls the video signal output level from 107 constantly. In addition, reference numeral 119 denotes an external AV device such as a VCR or a laser disc player, and 120 denotes the voice detector 106 and the image detector 107 according to the switching signal from the microprocessor 111. And a switching unit for selectively outputting audio and video signals from the external AV device 119. Although reference numeral 121 is not shown for the audio signal output from the switching unit 120, the base, treble, and volume according to the control signal from the microprocessor 111. An audio processing unit that executes audio processing such as the above is shown, and 122 represents an audio amplifying unit which amplifies the audio signal processed by the audio processing unit 121 and outputs it to the speaker. Further, reference numeral 123 is not shown for the image signal output from the switching unit 120, but according to the control signal from the microprocessor 111 Color, tint, Brightness ), And outputs R (Red), G (Green), and B (Blue) signals corresponding to the video signal. The RGB signal output from the image processor 123 is mixed with the RGB and OSD blanking signal Y ′, which are the output signals of the OSD generator 112 described above, in a second mixer indicated by reference numeral 124, and is output. 125 denotes a CRT driver for driving the CRT based on the RGB signal output from the mixer 124.

That is, in the above-described TV, when the viewer selects the TV / AV mode using the remote control device 108, the microprocessor 111 controls the switching unit 120 to control the voice detector 106 and By selectively outputting the video and audio signals from the video detector 107 and the video and audio signals from the external AV device 119 to the video processor 123 and the audio processor 121, the viewer Video and audio played by the external AV device 119 can be viewed through the CRT and the speaker of the TV. Therefore, such a television receiver has a function of simply outputting a broadcast signal, and its use range is limited. For example, when a viewer wants to know which broadcasting station provides a program currently being displayed during TV viewing, the viewer can view the channel number displayed on the CRT while up-down the broadcasting channel. However, this broadcasting station search method also causes the following problems. That is, when the viewer does not know the broadcast station name according to the channel number, the broadcast station name cannot be known even if the channel number is displayed during the program viewing. In other words, the viewer had to know the name of the broadcasting station corresponding to the channel number.

Accordingly, an object of the present invention is to provide a broadcasting station search method of a TV having a broadcasting station search function, which enables the viewer to easily know the broadcasting station name with a simple key operation when the viewer wants to know the broadcasting station name to which a program is currently provided.

According to the present invention for achieving the above object, a step of determining whether a key for searching a broadcast station is selected through a remote control, and if the key is input, initializing a buffer for storing information for the broadcasting station and then designating each broadcasting station. Determining whether a key is selected, encoding the information corresponding to each broadcasting station name in the buffer if the key is selected, determining whether to perform a broadcasting station search, and a signal to search for the broadcasting station ID generating information corresponding to the coded broadcasting station name stored in the buffer, searching for a broadcasting station providing a current program, detecting search completion, and outputting the IDized broadcasting station information when the search is completed. A step is made.

1 is a block diagram for explaining the configuration and function of a typical television receiver having an OSD function;

2 is a block diagram illustrating the main parts for explaining a TV having a broadcasting station search function according to the present invention;

3 is a flowchart for explaining a broadcasting station searching method of a TV having a broadcasting station searching function according to the present invention.

Explanation of symbols on the main parts of the drawings

201: tuner portion 202: chroma circuit portion

203: R, G, B driver section 204: amplification section

205: Micom 206: Slicer IC

210: CRT

Referring to FIG. 2, the present invention provides a tuner unit 201 for selectively amplifying a television radio wave of a channel to be received in a television radio wave received from an antenna and converting the signal into an intermediate frequency signal of video and audio, and the tuner unit. The chroma circuit unit 202 for extracting the original color difference signal from the carrier color signal output from the 201 and the R, G, and B image signals output through the chroma circuit unit 202 are converted into appropriate signals for display on the CRT. An R, G, and B driver section 203, an amplification section 204 for amplifying the audio signal detected by the chroma circuit section 202 to a predetermined width, a microcomputer 205 for controlling the entire system, and the chroma And a slicer IC 206 that stores a unique number (ID) representing a broadcast station name on the broadcast signal output from the circuit unit 202. Here, reference numeral 210 denotes a CRT.

The tuner unit 201 selectively amplifies the television radio wave of the channel to be received in various television radio waves coming through the antenna, converts the signal into an intermediate frequency signal of video and audio, and outputs the signal to the chroma circuit unit 202. At this time, the tuner unit 201 operates under the control signal of the microcomputer 205. The chroma circuit unit 202 that receives the television signal corresponding to the channel selected by the microcomputer 205 and converts it into an intermediate frequency signal of an image and audio signal, receives the carrier signal. Disconnect. Subsequently, the voice signal separated by the chroma circuit unit 202 is amplified by a predetermined width through the amplifier 204 and output through the speaker. In addition, the color difference signal output from the chroma circuit unit 202 is displayed on the CRT through the R, G, and B driver units 203 which are converted into appropriate signals for display on the CRT. In this case, the broadcast signal transmitted through the tuner 201 includes various broadcast related information. One of them is the K system. The K system is based on Teletext. That is, two bytes of data per 1H (H: horizontal section) are carried on a predetermined line of the invisible line between the visible lines from the vertical sync retrace time of the composite video signal. This data includes clock data, broadcast station names, and a week's worth of broadcast programs for each channel.

As described above, the broadcast signal carrying such information is transmitted to the chroma circuit unit 202 through the tuner unit 201, and the chroma circuit unit 202 is the original color difference from the carrier color signal output from the tuner unit 201. The signal is separated and the audio signal is output to the amplifier 204. At this time, the slicer IC 206 is connected to the chroma circuit unit 202 and stores the broadcast information as described above in the broadcast signal received through the tuner unit 201. In this process, when the viewer wants to know which broadcasting station provides a program currently being displayed, the viewer sends a signal to the microcomputer 205 by operating a key of the remote controller. Therefore, the microcomputer 205 receives the stored broadcasting station information through the bus line connected to the slice IC 206. The microcomputer 205 outputs a signal corresponding to the input broadcasting station information to the amplifier 204. Therefore, the viewer can hear the name of the broadcasting station through the speaker.

Referring to FIG. 3, it is determined whether a broadcast station search key is selected (S101), and if it is selected, the buffer is initialized (S102). Then, it is determined whether a key for designating each broadcasting station is selected (S103). If the key is selected, a unique number corresponding to each broadcasting station is coded (S104). Subsequently, it is determined whether the broadcast station search is completed (S105). If the search is completed, the coded information of the designated broadcast station is stored in the initialized buffer (S106). The current program is searched for (S107). Subsequently, it is determined whether the search is completed (S108), and when the search is completed, the coded information stored in the buffer is output (S109). When the microcomputer recognizes the output information and outputs the corresponding signal to the amplifier, the amplified signal is transmitted to the viewer through the speaker.

As described above, the television receiver and the warning sound generating method of the warning sound generating function of the present invention generate a warning sound when the user selects an undesired key due to carelessness when watching TV and on / off, and thus the user does not want the sound again. It is effective to improve convenience by not selecting a key.

Claims (1)

Determining whether a key for searching for a station is selected through the remote controller; Initializing a buffer for storing information when the key is input, and then determining whether a key for designating each broadcasting station is selected; If the key is selected, encoding information corresponding to each broadcasting station name in the buffer; Determining whether to perform a broadcast station search; IDizing information corresponding to a coded broadcasting station name stored in the buffer when a signal for searching for the broadcasting station is generated; Detecting search completion after searching for a broadcasting station providing a current program; And a step of outputting the IDized broadcasting station information when the searching is completed.