KR20000028160A - Method for minimizing errors when automatically setting up present time on tv - Google Patents

Abstract

PURPOSE: A method for minimizing errors when automatically setting up present time on TV is provided to correct the present time by minimizing the errors, when automatically correcting the present time of a timer in a micom, in a television system which does not have a special decoder necessary for detecting broadcasting codes or tele texts, and to exactly perform a reservation function of TV without errors. CONSTITUTION: A method for minimizing errors when automatically setting up present time on TV comprises the steps of: setting up a specific time zone when news for informing reports is broadcasted(step1); searching a sound signal among news broadcasting received in the specific time zone through the specific channel(step2); deciding whether a reports warning sound of a specific pattern is generated in the sound signal(step3); correcting into a most exact time with present time of a timer, when the warning sound is generated(step4). The step 3 samples the sound signal, and decides a first sound, a second sound and a third sound which are consecutively existing, as reports sounds. The first sound has 1KHz frequency, and has first delay time of predetermined time after a signal which a change of current is 100. The second sound has 100Hz frequency, and a change of current is 70. The third sound has 100Hz frequency, and a change of current is 60.

Description

ERROR MINIMIZING METHOD FOR AUTO TIME CORRECTION IN A TELEVISION

The present invention relates to automatic setting of the current time in a television. In particular, in a television system that does not have a specific decoding means for detecting a broadcast code or teletext, the error is automatically corrected when the current time of the timer is automatically corrected in the microcomputer. The present invention relates to a method for minimizing errors in automatically setting a current time in a television to be minimized and corrected.

In general, in a television that receives a broadcast signal and enables viewing of video and audio, the television is turned on at a wake-up time set by the user for wake-up and sleep reservations, and the television is turned on at a bedtime set by the user. There is a reservation function to turn off.

The reservation function is performed by checking whether the reservation time (wake-up time, bedtime time) is reached by using a timer built in the microcomputer operating based on the constant power supply from the power supply unit supplying predetermined power to each component of the television. When the scheduled time comes, the power supply of the TV can be controlled on / off by selectively blocking / supplying the predetermined power from the above-described power supply for operating each component, or selectively operating the CRT of the monitor having the largest power consumption. Control, namely, the operation of the high voltage circuit supplying the high voltage direct current required for the CRT by stepping up and rectifying the pulse voltage generated during the horizontal blanking period in the horizontal output circuit and the horizontal output circuit for supplying a suitable sawtooth current to the horizontal deflection coil. The microcomputer selectively selects whether or not the horizontal output circuit generates pulse voltage Control and perform the function.

On the other hand, such a reservation function helps the user wake up by starting the broadcasting of the television in the morning through the user's wake-up time setting, and by setting the sleep time, the user's time to go to sleep stops This is a very useful feature that allows the user to recognize the bedtime or to automatically turn off the TV when the user is asleep.

1 is a schematic block diagram of a typical TV, which is a key input unit 10, a microcomputer 20, a timer 30, a tuner unit 40, a video / audio signal processing unit 50, and an OSD unit 60. ), A monitor 70, a speaker 80, and a power supply unit 90.

In this configuration, the key input unit 10 is provided with a plurality of keys for performing various operations of the television outputs a key signal corresponding to the user's key operation to the microcomputer 20, the microcomputer 20 is the key input unit Each component is controlled on the basis of the key signal from (10) to control the overall operation of the television. The timer 30 is reset based on a predetermined power source from the power supply unit 90 described later, and is based on the predetermined oscillator. To keep the current time.

The tuner 40 receives a broadcast signal received through a channel selected under the control of the microcomputer 20, and the video / audio signal processor 50 demodulates / decodes a broadcast signal applied from the tuner 40. It detects and separates the video signal and the audio signal, and processes the separated video signal into a displayable signal and outputs it to the OSD unit 60. The separated audio signal is processed into a signal that can be output and output to the speaker 80. The OSD 60 synthesizes the video signal applied from the video / audio signal processor 50 and the text signal corresponding to the control of the microcomputer 20 and outputs the synthesized text signal to the monitor 70.

In addition, the power supply unit 90 supplies predetermined power for the operation of each component described above.

When performing the reservation function in the television having the above-described configuration, the current time maintained based on the driving of the timer 30 is used, but the current time of the timer 30 has a possibility that an error occurs when time passes. When these errors accumulate, the current time is not accurate.

Therefore, since the reservation function in the above-described television can be properly performed only when the current time of the timer inside the television is accurate, the user can confirm the current time of such a television and the current time set in the television is actually If there is a difference from the current time, the user has to correct the difference by setting a predetermined key operation.

Recently, however, techniques for automatically correcting the current time of television have been disclosed.

For the current time correction, the Korean Utility Model Registration Application No. 94-36981 or the like transmits the current time information to the vertical synchronization signal section of the composite video signal from a broadcasting station and transmits the vertical synchronization signal section of the received composite video signal. The present time information is detected by comparing the detected current time information with the current time of the timer, and the current time is corrected by the detected current time information.

More specifically, a timer for generating " hour ", " minute " and " second " data, and a synchronization detector for receiving / demodulating a television broadcast signal to extract a composite video signal and detecting synchronization of the composite video signal, and the synchronization is performed. A time information detector for inputting the output of the detector to detect current time information, a time comparator for comparing the "minute" data of the current time of the timer with a predetermined reference value when the current time information is detected, and a time comparison result, the current time of the timer If the "minute" data of the timer is less than or equal to the reference value, set the "minute" data of the timer to "0", and if the "minute" data of the timer's current time exceeds the reference value, increase the "hours" data of the timer by one. And a time setting control unit for controlling the timer to set the "minute" data to "0".

In detail, in a broadcasting system providing an extended data service (EDS), for example, KBPS (Korea Broadcasting Program System) is a data for broadcasting programs and scheduled recording on a broadcast signal, for example, a channel, a broadcast category (e.g., For example, news, drama, sports, etc.), broadcast start / end time, viewing grade, and standard time data can be converted into digital signals and inserted into an arbitrary horizontal line during a vertical blanking interval (VBI). By doing so, this signal is decoded by the KBPS decoder on the video receiving device side to perform a broadcast program reservation recording function or the like.

Therefore, in the television equipped with the KBPS broadcasting system providing the above-described EDS and equipped with the KBPS decoder, the standard time data is decoded from the above-mentioned data to correct the television's time.

Typically, standard time data is coded into a predetermined digit (e.g., 8 digits), including "hours", "minutes", "seconds", and inserted into any horizontal line within the vertical blanking period of the video signal. In television, the TV microcomputer uses the decoded standard time data by decoupling the sync signal from the broadcast signal received from the tuner, extracting and decoding the standard time data inserted in any horizontal line within the vertical blanking period of the separated sync signal. The current time of the internal timer is corrected.

However, poor reception of a broadcast signal in the process of extracting and decoding all data (8 digits) of "hours", "minutes", and "seconds" of standard time data inserted in any horizontal line within the vertical blanking period described above. There is a problem that the probability of an error is increased based on the sensitivity, and when such an error occurs, an error of "hours" or "minutes" generates a large error of the current time, and thus has a wrong current time on the television.

In addition, there has been a problem that there is no specific method for performing time correction in a television system that does not have a specific decoding means necessary for detecting a broadcast code or teletext.

An object of the present invention for solving the above-mentioned problems of the prior art is to automatically correct the current time of a timer inside a microcomputer in a television system that does not have a specific decoding means necessary for detecting a broadcast code or teletext. The present invention provides a method of minimizing errors when automatically setting the current time in a television to minimize and correct the error.

1 is a schematic block diagram of a typical typical television

2 is a diagram illustrating a sampling waveform of a time signal sound.

3 is a flowchart illustrating an error minimization process in automatically setting a current time in a television according to a preferred embodiment of the present invention.

A feature of the present invention for achieving the above object is a method of calibrating the current time of an internal timer in a television, comprising: a first step of setting a specific channel and a specific time zone in which a news broadcast informing the time signal is provided on the channel; A second step of searching for a sound signal during a news broadcast received at a specific time period through a specific channel set through the first step; and whether a warning signal of a specific pattern is generated from the sound signal found through the second step. And a fourth step of correcting at a time closest to the current time of the internal timer when it is determined that the time signal warning sound is generated through the third step.

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.

First, prior to describing the present invention, the technical spirit to be applied in the present invention has been described, and the time signal warning sound mixed with the broadcast signal has a signal waveform as shown in FIG. 2.

That is, the time signal warning sound mixed with the broadcast signal is generally shown in FIG. 2, which has a frequency of 1 KHz and has a first delay time indicated by reference numeral A after a signal having a variation in current of 100. One sound and a second sound having a frequency of 100 Hz after the first delay time indicated by reference number A and having a change in current of 70 are present continuously, and after the second delay time indicated by reference number B, After the second delay time, a third sound having a frequency of 100 Hz and having a change in current of 60 is continuously present.

At this time, the time point at which the third sound disappears represents the right time of the time signal. The time difference between the first delay time A and the second delay time B is about 2 to 3 times different, and the second delay time B is It is longer than the first delay time (A).

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

3 is a flowchart of an error correction process in automatically setting a current time in a television according to the present invention.

In step S101, the user sets a specific time zone news of a specific channel informing the time signal. At this time, the user substantially sets only a specific channel and a specific time. Thereafter, in step S102, it is determined whether the channel currently tuned in during the television operation corresponds to the channel previously set in step S101, and if it is determined that the channel is the corresponding channel, proceeds to step S103.

In step S103, the microcomputer 20 determines whether the current time belongs to a specific time zone set in the step S101 by using the internal timer 22. If it is determined that the current time belongs to a preset time zone, The flow proceeds to step S104.

In step S104, after the sound signal is separated from the currently received broadcast signal, the separated sound signal is displayed to the outside through a speaker and at the same time, a sampling process is performed. At this time, the sampling process is performed inside the microcomputer 20, and the above sampling process is continued until it is determined in step S105 that it is a time signal warning sound.

In step S105, when sampling data of the time signal warning sound as shown in FIG. 2 is detected, the current timer time is corrected to the nearest right angle.

As described above, according to the present invention, it is possible to maintain an accurate current time at all times by minimizing an error in automatic correction of the current time in a television, thereby having an effect of accurately performing the reservation function of the television without errors.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the claims. Anyone can see it easily.

Claims (2)

In the method of correcting the current time of the internal timer in the television, A first step of setting a specific channel and a specific time zone in which a news broadcast informing the time signal is provided; A second step of searching for a sound signal during a news broadcast received at a specific time period through a specific channel set through the first step; A third step of determining whether a warning signal sound of a specific pattern is generated from the sound signal searched through the second step; And And a fourth step of correcting at a right angle closest to the current time of the internal timer when it is determined that the time signal warning sound is generated through the third step. The method of claim 1, The third step is to sample a sound signal has a frequency of 1KHz and has a first sound having a first delay time of a predetermined time after a signal having a variation of current of 100 and a frequency of 100Hz after the first delay time. The second sound with a current variation of 70 is continuously present, and after the second delay time of a predetermined time, a third sound with a frequency of 100 Hz and a current variation of 60 is continuously present. And an error minimization method for automatically setting the current time in the television, characterized in that it is determined.