KR100204209B1 - Time error correction method of kbps data in television - Google Patents

Abstract

The present invention provides a time error correction method for receiving KBPS data of a plurality of channels by comparing the respective time data and correcting time error caused by ghost phenomenon or weak signal reception in broadcasting signal transmission. do.

Accordingly, the present invention extracts the KBPS data contained in each broadcast signal by sequentially tuning a plurality of channels according to the execution of the periodic set-setting function for the current time, and compares the time portion of each KBPS data by mutual comparison. When the minutes for the KBPS data of the plurality of channels match, characterized in that the step of setting the time of the internal timer by the hours of the matched KBPS data.

Description

Time Error Correction Method of KBPS Data

The present invention relates to a time error correction method of KBPS data, and more particularly, to correct the time error of KBPS data according to the signal variation of a broadcast signal transmitted from a broadcasting station to an accurate time by comparing the time according to the KBPS data of a plurality of channels. It is about time error correction method of KBPS data to enable.

Conventionally, in a conventional television, a composite video is processed as a result of processing a video signal and an audio signal by tuning a desired single channel television broadcast signal from a plurality of television broadcast signals transmitted from a plurality of television stations through a single tuner. The signal is output through a CRT (Cathode Ray Tube) device that reproduces a single screen, and the audio signal is output through a speaker that reproduces a single channel of audio.

In such a television, it is possible to reserve a broadcasting channel and a broadcasting time by predetermined user information transmitted from the broadcasting station by multiplying the broadcasting channel allocated by the television broadcasting station and the diversification of the broadcasting program organized by each broadcasting channel. It is supposed to.

In addition, even in a video tape recorder capable of recording a television program on a video recording medium such as a video tape, the user can reserve reserved recording settings such as a reservation time and a reservation channel of a broadcast program to be reserved on the video tape. KBPS reservation recording function is provided to receive KBPS data superimposed in the vertical blanking period of a television broadcast signal from a television station and to easily record a desired broadcast program by a predetermined selection operation by a viewer without having to input it manually. It is.

KBPS data that can be used as user information in such a television or video tape recorder not only has various user information such as program name, program type or total broadcasting time for the broadcast program of the corresponding channel, but also the date and time of the present time. The time data for the hour, minute, and minute are included so that the current time can be set accurately.

However, in the case of KBPS data included in such a television broadcast signal and transmitted, time data may be lost due to loss or change of data in a state where signal fluctuation such as ghost phenomenon or reception of weak signal occurs due to weather change or obstacle. There is a possibility that an error may occur, and when an error of the time data occurs, the reservation setting of a predetermined broadcast program is made incorrectly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and by receiving KBPS data of a plurality of channels and comparing the respective time data, it is possible to correct a time error caused by ghost phenomenon or weak signal reception in broadcast signal transmission. The purpose is to provide a time error correction method for KBPS data.

In order to achieve the above object, according to the time error correction method of KBPS data according to the present invention, KBPS data included in each broadcast signal is sequentially tuned according to execution of a periodic set setting function for the current time. Extracting and comparing the time minutes of each KBPS data with each other, the time of the internal timers is set by the time minutes of the matched KBPS data when the time minutes of the KBPS data of the plurality of channels match. It provides a time error correction method of the created KBPS data.

According to the present invention configured as described above, when the time of the internal timer is set in the television, the first and second broadcast channels are sequentially tuned to extract KBPS data included in each broadcast signal, If the time minutes do not match as a result of comparing the prepared time data, the third broadcast channel is tuned to compare the time minutes included in the KBPS data. When the time data is matched with each other and the corresponding time data exists for a plurality of channels, the matched time portion is set as the time of the internal timer.

1 is a block diagram showing a television to which a time error correction method of KBPS data according to the present invention is applied;

2 is a flowchart illustrating the operation according to the preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

2: receiving antenna, 4: tuner,

6: image IF unit, 8: image amplifier unit,

10: video signal processor, 12: video output unit,

14: voice IF unit, 16: voice amplifier,

18: audio signal processing unit, 20: audio output unit,

22: data extraction section, 24: KBPS decoder,

26: function setting section, 27: channel data memory,

28: data storage, 30: timer,

32: control unit, 34: OSD signal processing unit,

36: signal conversion section.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a television to which the time error correction method of KBPS data according to the present invention is applied. In the apparatus of the present invention, reference numeral 4 denotes a channel for selecting a predetermined channel from the control unit 32, which will be described later. In addition to receiving band data (VL, VH, U) and channel tuning data, the RF signal of the corresponding channel is tuned, and the local oscillation frequency signal generated by the channel tuning data is mixed with the RF signal of the tuned broadcasting channel. Shows a tuner that converts an intermediate frequency signal of 58.75MHz.

Also, reference numeral 6 denotes an image IF unit which separates the image intermediate frequency signal from the tuned television broadcast signal and amplifies the image intermediate frequency, and 8 denotes a signal amplification for processing the intermediate frequency amplified image intermediate frequency signal. In addition, an image amplification unit is responsible for distributing signals to the synchronous circuit and the amplifying circuit, correcting transmission times of color signals and luminance signals, and compensating for mid and high frequency characteristics.

Reference numeral 10 denotes a luminance signal and a color difference signal separated from the signal-amplified video signal, and performs luminance adjustment and color demodulation operations, synthesizes the composite video signal, and outputs the synthesized video signal. 12 shows an image signal processing unit for synthesizing the OSD display signal with the composite video signal and outputting the composite image signal and the OSD display signal amplified by the video signal, and the vertical signal for driving the vertical / horizontal deflection coil of the CRT. Indicates an image output unit for generating a horizontal drive signal.

Reference numeral 14 denotes a voice IF unit which separates the 4.5MHz voice intermediate frequency signal from the television broadcast signal tuned through the tuner 4 and amplifies the medium frequency amplified voice signal, and 16 denotes the voice signal of the intermediate frequency amplified voice signal. A voice amplifier that amplifies a signal up to a processable signal level.

Also, reference numeral 18 denotes a voice signal processing unit for outputting through volume control, sound quality control, voice multiplex processing or stereo signal processing for the signal amplified voice signal, and 20 denotes a power amplification of the voice signal processed voice signal. A voice output unit for reproducing through a speaker is shown.

Further, reference numeral 22 denotes a data extraction unit for extracting transmission data superimposed within the vertical blanking period included in the video signal from the image amplifier 8, and 24 denotes the date and time of the scheduled time in the extracted transmission data. A KBPS decoder which decodes a KBPS data including time data indicating minutes so as to be recognized by a control unit 32 to be described later.

Further, reference numeral 26 includes a matrix button unit provided in a remote control unit for remote control or a predetermined control panel of the main body, and a function setting unit for setting a reservation time such as an on / off timer reservation function based on a periodically set current time. Indicates.

Further, reference numeral 27 denotes a channel data memory in which band data (VL, VH, U) and channel tuning data (VT) are stored for a plurality of tuneable broadcast channels, and 28 denotes a plurality of channels according to the current time set setting. Represents a data storage unit for storing time data of the date, hour, and minute accurately calculated by the data comparison between the time data contained in each of the KBPS data, 30 is a control unit 32 to be described later having an oscillation clock generating means such as a crystal oscillator Indicate the timer that sets the current time correctly and sets the time by the set control.

Further, reference numeral 32 denotes band data (VL, VHU) and channel channel selection for a plurality of channels from the channel data memory 27 by executing a set setting function for the time of the timer 30 according to a predetermined setting period. The data VT is read out to be sequentially tuned through the tuner 4, and the time data for the date, hour, and minute included in the KBPS data superimposed on the sequentially selected multiple channel video signals. The control unit for setting and setting the matching time data in the timer 30 as the correct time by comparing the data.

Also, reference numeral 34 generates OSD display information for displaying the set date, hour, and minute on the screen according to the comparison result of the time data included in the KBPS data of the plurality of channels under the display control of the controller 32. An OSD signal processor is provided, and reference numeral 36 denotes a signal converter that analog-converts the generated OSD display information data to the image signal processor 10.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 2.

First, the process proceeds to step 42 and the control unit 32 executes the set setting function of the current time for the timer 30 according to the predetermined setting cycle, and according to the predetermined first channel from the channel data memory 27. The band data VL, VH and U and the channel tuning data VT are read and applied to the tuner 4 so that the corresponding first channel can be tuned. KBPS data superimposed on the video signal of the first channel through the image amplifier 8 is extracted by the data extractor 22 and decoded by the KBPS decoder 24 so as to be recognizably decoded. The first time setting data A included in the KBPS data of the channel is received.

In step 44, the control unit 32 reads out the band data VL, VH, U and channel tuning data VT of the other second channel from the channel data memory 27 to adjust the tuner. In step (4), the corresponding second channel is tuned, and the process proceeds to step 45 where the data is extracted through the data extraction unit 22 and decoded by the KBPS decoder 24 according to the second channel. The second time setting data B included in the KBPS data is received.

In this state, the control unit 32 compares the first and second time setting data from the KBPS data according to the first and second channels with each other and compares the time setting data with each other.

If it is determined in step 46 that the first and second time setting data do not coincide with each other, then control proceeds to step 47 to access the channel data memory 27 and the first and second channels. Upon reading the band data VL, VH, U and channel tuning data VT of the other third channel and applying it to the tuner 4, the corresponding third channel is tuned, and the process proceeds to step 48 where the KBPS decoder The third time setting data C included in the KBPS data according to the third channel decoded through the terminal 24 is received.

In this state, the process proceeds to step 49 and the controller 32 compares the first time setting data A according to the KBPS data of the first channel with the third time setting data C according to the third channel. Determine if they coincide with each other.

If it is determined in step 49 that the first and third time setting data A and C do not coincide with each other, then control proceeds to step 50 where the second time setting data of KBPS data according to the second channel is set. It is determined whether (B) and the third time setting data C according to the third channel coincide with each other.

As a result of the determination in step 50, if it is determined that the second and third time setting data (B, C) coincide with each other, the control proceeds to step 51, whereby the control according to the KBPS data of the second channel or the third channel is performed. The time setting of the timer 30 is accurately set through the two time setting data B or the third time setting data C, and the date, time, and minute displayed by the timer 30 are repeatedly set. The data storage unit 28 is updated and stored.

However, if it is determined that the second and third time setting data (B, C) do not coincide with each other even in the determination result of step 50, the process proceeds to the step 42 again and repeats the steps 42 to 48. .

According to the present invention made as described above, it is possible to set the time of the internal timer for the mutually matched time by comparing the time setting data contained in the KBPS data of a plurality of channels in the television, respectively, Even if a TV broadcast signal has a data loss or data error of KBPS data due to a transmission error such as ghost phenomenon or weak signal reception, there is an advantage that the time set by the KBPS data can be accurately detected and set.

Claims (1)

In accordance with the execution of the periodic set function for the current time, the plurality of channels are sequentially tuned to extract KBPS data included in each broadcast signal, and the KBPS data of the plurality of channels is compared by mutually comparing the time portions of the respective KBPS data. And if the time minutes coincide with each other, setting the time of the internal timer by the time minutes of the matched KBPS data.