KR20000028158A - Method for setting time automatically in television - Google Patents

Abstract

PURPOSE: A method for setting time automatically in a television is provided to set current time by using standard time data from EDS(Extended Data Service)and another standard time data in a teletext. CONSTITUTION: A PDC(Program Delivery Control) decoder(80) abstracts a standard time data as a first standard time data from VBI(Vertical Blanking Interval) in the PDC signal by a micro-computer(20). After decoding the first standard time data, the PDC decoder(80) transmits the decoded data to the micro-computer(20). A teletext decoder(90) detaches a standard time data as a second standard time data from VBI in broadcasting signal received by a tuner(30). The micro-computer(20) receives the decoded second standard time data from a teletext decoder(90). The micro-computer(20) corrects a current tie using the first or the second standard time data if the micro-computer(20) receives only one standard time data. In case of receiving two standard time data, the microcomputer compares and calculates the difference between two signals. Assuming that the difference is smaller than an error range, the micro-computer(20) calculates average time of the two signals. If not, the micro-computer(20) displays time setting error on a monitor(70) by controlling an OSD(On Screen display) part(50) during a few second.

Description

METHOD FOR AUTO TIME CORRECTION IN A TELEVISION

The present invention relates to a method of automatically setting the current time in a television, and particularly, when the current time of a timer is automatically corrected in a microcomputer in a television, the current time is corrected by using PDC data and text data in parallel to minimize the error. The present invention relates to a method for automatically setting the current time in a television.

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, there is an inconvenience that the user has to correct and set the difference by a predetermined key operation.

On the other hand, in a broadcasting system providing an extended data service (EDS), for example, KBPS (Korea Broadcasting Program System) is a broadcast program and data for scheduled recording on a broadcast signal, for example, a channel, a broadcast category (for example, News, drama, sports, etc.), broadcast start / end time, viewing grade, and standard time data, etc., are converted into digital signals and inserted into any horizontal line during the vertical blanking interval (VBI), 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.

However, even in the current time automatic correction method using only the EDS, there is a problem in that the current time of the television cannot be corrected correctly when the EDS data is not correctly received or the EDS broadcast is not provided.

In addition, as a broadcasting system for providing such an EDS, there are, for example, a VPS (Video Programming System) in the UK and a European region, and a Program Delivery Control (PDC) in the UK. For example, various broadcast information data are loaded on an arbitrary horizontal line in the vertical blanking period and transmitted.

On the other hand, the text mode is a mode for receiving teletext, and text broadcasting refers to an information service for displaying text pages and images mainly composed of text information on a monitor screen of a television. That is, information such as domestic and foreign news, economic industry, sports, tourism and leisure, cultural arts, life / science / women, broadcasting, and stocks are part of the TV broadcasting signal, that is, digitally encoded and inserted into the vertical return period of the video signal. Or a coded telephone signal, which is transmitted by a telephone line. The character decoder included in the television extracts the desired information from a normal television broadcast signal or from the telephone line to accumulate necessary information pages for display on a monitor. It is called teletext in the UK, video text in Germany, NHK in Japan, and antiope in France. The text information also includes standard time data for the current time correction of television.

Therefore, the present invention provides a method for more accurately correcting the current time of the television by using not only the standard time data provided by the EDS such as the PDC, but also the standard time data provided by the teletext such as teletext. I was sought.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide not only standard time data provided by the EDS at the time of time correction, which automatically sets the value of a timer that maintains the current time inside the microcomputer. The present invention provides a method for automatically setting a current time in a television that can accurately correct the current time of a television by using all standard time data provided by a teletext broadcasting.

1 is a schematic block diagram of a typical typical television.

2 is a schematic block diagram of a television employed in accordance with the present invention;

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

<Description of the code | symbol about the principal part of drawing>

10: key input unit 20: microcomputer

30: tuner 40: video / audio signal processing unit

50: OSD 60: Monitor

70: speaker 80: PDC decoder

90: tele text detection unit 100: power supply unit

A method for automatically setting a current time in a television according to the present invention is a method of correcting a current time of a television by using standard time data provided by an EDS and standard time data provided by a text multicasting service on a television. Is received, the first signal is extracted from the EDS data inserted in a predetermined horizontal line section within the vertical blanking period of the received broadcast signal by receiving the broadcast signal directed to the set channel, and the vertical blanking of the received broadcast signal is performed. Extracting and decoding second standard time data from the character multicast data inserted in a predetermined horizontal line section within an erasing period, and extracting only one standard time data from the first or second standard time data. Using the standard time data, the timer inside the TV Correcting the current time, and calculating both an error of the first and second standard time data when both of the first and second standard time data are extracted, and if the error is included within a predetermined range. And correcting the current time of the timer with an average value of second standard time data, and displaying, for a predetermined time, an OSD text screen indicating a time correction error when the calculated error is out of the predetermined range. It is characterized by.

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.

2 is a schematic block diagram of a television employed in accordance with a preferred embodiment of the present invention, including a key input unit 10, a microcomputer 20, a tuner unit 30, a video / audio signal processing unit 40, an OSD unit. 50, a monitor 60, a speaker 70, a PDC decoder 80, and a teletext decoder 90.

In this configuration, the key input unit 10 is a key input means for performing the operation of the television, and has a plurality of keys for performing the operation of the television, and outputs a key signal corresponding to the user's key operation. By using a remote control that can be input at a remote location, the user inputs a key signal operated by a user on a predetermined infrared carrier, and transmits the received infrared signal to the microcomputer 20 by receiving, amplifying, and detecting the transmitted infrared signal.

Then, the microcomputer 20 is driven based on the constant power supply from the power supply unit 80, which will be described later, and the tuner unit 30, the video / audio signal processing unit 40 and the key signal based on the key signal from the key input unit 10. The OSD unit 50 is selectively controlled to control the overall operation of the television, and in particular, to correct the current time held by the internal timer of the television every predetermined period, the PDC decoder unit 80 and the teletext decoder unit ( Based on the respective first and second standard time data read out from 90), the current time correction as described later is controlled.

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 video / audio signal processing unit 40 separates the broadcast signal applied from the tuner unit 30 into a video and audio signal under the control of the microcomputer 20 and processes the video signal into a signal capable of display and output, respectively. Are output to the OSD unit 50, and audio signals to the speaker 70, respectively.

In addition, the OSD (On Screen Display) unit 50 is a device for processing text on a television screen, and reads a text signal corresponding to the control of the microcomputer 20 to display the video / audio signal to be displayed at a predetermined screen position The synthesizer outputs a video signal or a blue-back signal (the background color can be set to a color other than blue) applied from the processing unit 40.

The PDC decoder 80 also extracts standard time data from the PDC data inserted at a predetermined position within the vertical blanking period of the broadcast signal received from the tuner 30 under the control of the microcomputer 20. Decode and apply to the microcomputer 20.

Meanwhile, the teletext decoder 90 extracts standard time data from the teletext data inserted at a predetermined position within the vertical blanking period of the broadcast signal received from the tuner 30 under the control of the microcomputer 20. And it decodes and applies it to the microcomputer 20.

Next, the present invention will be described in detail with reference to the flowchart of FIG. 3 attached to the automatic current time setting process in the television according to the preferred embodiment of the present invention including the above-described configuration unit.

First, the current time of the television reaches a predetermined time which is a preset current time correction time, or the television is powered on in standby mode or in standby mode based on the power on / off key operation of the user's key input unit 10. It is switched to to determine whether the power of the television is turned off (step 300).

At this time, when the predetermined time for the current time correction is reached, the microcomputer 20 controls the PDC decoder 80 to separate the synchronization signal of the broadcast signal received from the tuner unit 30 (step 302), and the separated synchronization signal. Standard time data is extracted as first standard time data from the PDC data inserted in any predetermined horizontal line section in the vertical blanking period of (step 304).

Next, the microcomputer 20 controls the teletext decoding unit 90 to insert the teletext data inserted into any predetermined horizontal line section in the vertical blanking period among the synchronization signals of the broadcast signal received from the tuner unit 30. Standard time data included in the second standard time data is extracted, and the extracted standard time data is decoded (step 306).

At this time, each of the decoded first and second standard time data is transferred to the microcomputer 20, so that the microcomputer 20 determines whether the first and second standard time data are detected (step 308).

At this time, if the second standard time data is not applied from the teletext decoding unit 90 and only the first standard time data is applied from the PDC decoding unit 80 to the PDC data, the microcomputer 20 applies the applied first standard time data. The current time maintained by the timer inside the microcomputer 20 is corrected (step 310), and the routine ends.

On the other hand, if only the second standard time data is applied from the tele text decoding unit 90 among the tele text data, and the first standard time data is not applied from the PDC decoding unit 80, the microcomputer 20 transmits the tele text decoding unit 90. The current time of the timer holding the current time of the television in the microcomputer 20 is corrected using the second standard time data applied from step S3 (step 312), and the routine is terminated.

On the other hand, when the first and second standard time data is applied from both the PDC decoding unit 80 and the teletext decoding unit 90, the microcomputer 20 calculates an error between the applied first and second standard time data ( Step 314).

Next, it is determined whether the calculated error is out of the predetermined predetermined error range (step 316), and if the calculated error does not fall within the predetermined error range, the microcomputer 20 determines the average time of the applied first and second standard time data. The current time of the television is corrected by the calculated average time (step 318), and the routine ends.

On the contrary, if the error calculated in the above-described step 314 is out of the predetermined predetermined error range, the microcomputer 20 controls the OSD unit 50 to display and display the OSD character for a predetermined time as an OSD character. The viewer is made aware of the time correction error (step 320), and the routine is terminated.

On the other hand, although not shown in step 308 described above, if neither of the first and second standard time data is detected, the control proceeds to step 320 described above to display and control the time correction error.

On the other hand, it will be understood by those skilled in the art 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, when the TV automatically corrects the current time, the PDC data and the tele text data are complementary to each other, so that the error can be minimized and the current time can always be maintained. There is an effect that can be performed accurately without.

Claims (1)

A method of correcting the current time of a television by using standard time data provided by EDS and standard time data provided by teletext. Receiving a broadcast signal directed to a set channel at a predetermined predetermined period, extracting and decoding first standard time data from EDS data inserted into a predetermined horizontal line section within a vertical blanking period of the received broadcast signal, and receiving the received broadcast signal. Extracting and decoding second standard time data from the character multicast data inserted in a predetermined horizontal line section within the vertical blanking period of the signal; Correcting the current time of the timer inside the television by using the extracted standard time data when only one standard time data is extracted from the first or second standard time data; When both of the first or second standard time data are extracted, the error of the first and second standard time data is calculated to be an average value of the first and second standard time data when the error calculated within the predetermined range is included. And correcting a current time of a timer and displaying an OSD text screen indicating a time correction error for a predetermined time when the calculated error is out of the predetermined predetermined range.