KR100279577B1 - Automatic time setting device using broadcast signal - Google Patents

Abstract

The present invention relates to a time automatic setting device of a TV or a VCR, which is intended to eliminate the error of the setting time caused by only the oscillation signal of the crystal oscillator.

Therefore, the present invention is to decode and temporarily store the service code of the received broadcast signal, and to display the stored data sequentially on the display device to inform the exact time of the broadcast station.

The present invention also aims to always set the standard time in TVs and VCRs.

Description

Automatic time setting device using broadcast signal

1 is a block diagram of a conventional time setting apparatus.

2 is a block diagram of the automatic time setting apparatus of the present invention.

3 is a waveform diagram of a vertical synchronization signal in the time automatic setting apparatus of the present invention.

Figure 4 is a signal flow diagram for the operation of the automatic time setting device of the present invention.

* Explanation of symbols for main parts of the drawings

1: tuner 2: detector

3: synchronization separator 4: data line decoder

5: Data classification unit 6: Code checking unit

7: Interface register section 8,10: Buffer

9: RAM 11: Timing / Control Logic

12 system clock unit 13 display device

51: service code decoder 52: microcomputer

53: memory

The present invention relates to a time display device of a TV or VCR. In particular, the present invention reads the time information from the received information after receiving a broadcast signal, and provides the correct time to the display device. The present invention relates to an automatic time setting device using broadcast signals that enable recording at a more accurate time.

Conventional time setting apparatus, as shown in Figure 1, the crystal oscillator 101 for the clock, and the oscillation frequency (32,768KHz) of the crystal oscillator 101 The frequency divider 102 is divided into a frequency divider 102, a counter 103 that repeatedly counts the divided frequency, counts x times, and increments 1, and a display device 104 that displays a signal of the counter 103. .

Conventional time setting device configured as described above is based on the oscillation frequency (32.768KHz) of the crystal oscillator 101 for the clock through the divider 102 The number of repetitions of the divided frequency is counted through the counter 103, and the count is increased by 1 when the number of times is reached.

However, in the conventional time display device as described above, a temporal error occurs due to self error and external factors, namely, temperature characteristics, during the production of the crystal oscillator, and influences from noise sources such as segment signals or grid signals around the crystal oscillator. Since the oscillation waveform generates noise, the oscillation period is changed so that an error occurs in time, and there is a problem in that the time must be set again at the time of power-on or backup time.

An object of the present invention is to solve the conventional problems as described above, by reading the time information contained in the vertical retrace section from the information of the received broadcast signal to provide accurate time to the display device and at the same time more accurate than scheduled recording Invented a time automatic setting apparatus using a broadcast signal to be described below, will be described in detail with reference to the accompanying drawings.

According to the configuration of the present invention, as shown in FIG. 2, the tuner 1 receives and tunes a broadcast signal through an antenna, detects a broadcast signal received from the tuner 1, and separates vertical synchronization from the detected signal. A service code decoder 51 for classifying data in a separate vertical synchronization and checking for errors, and a microcomputer unit for storing data interfaced with the service code decoder 51 and controlling data input / output by comparing with input data. And a display device 13 for displaying data transferred from the microcomputer 52. As shown in FIG.

The configuration of the service code decoder 51 and the microcomputer 52 will be described in detail. The service code decoder 51 detects the received signal and the detector 2 detects the received signal. A synchronization separator 3 for separating vertical synchronization from the detected signal, a data line decoder unit 4 for detecting data in the separated vertical synchronization signal, and a data classification unit 5 for classifying the detected data And a code checking section 6 which decodes the data and checks for errors, and an interface register section 7 which transmits and receives data with the micom section 52. The microcom section 52 is a service code decoder section. A memory unit 53 comprising a buffer 8 for temporarily storing data transferred from 51, a RAM 9 for storing data, and a buffer 10 for transmitting and receiving data to and from the display device 13; Timing / control logic 11 for controlling data input / output of the memory unit 53, and timing / cone It constitutes a system clock unit 12 which applies a clock to the logic roll 11.

Referring to the operation and effects of the present invention configured as described above in detail.

2 is a block diagram of the automatic time setting apparatus of the present invention. As shown in FIG. 2, when the power is turned on, the display device 13 is reset, and when a broadcasting station transmits a broadcast signal carrying a service code, the tuner is used by using an antenna. (1) receives and tunes a broadcast signal, detects the signal in the detector 2, and the detected signal is input to the synchronization separator 3 and the data classification unit 5, and the synchronization separator 3 In this case, the vertical synchronization signal used as a reference signal for detecting the service code of the x-th line located in the vertical blacking section of the detected signal is separated, and the data is transmitted based on the vertical synchronization signal through the data line decoder 4. Detects the x-th line containing the data and transmits the data to the data classifying section 5, the data classifying section 5 classifies the data of the detected data line by bit unit and word, and sorts the data classified by the code checking section 6. Deco Data stored in the buffer 8 for interfacing with the microcomputer 52 and the decoded data through the interface register unit 7 for error checking, and to the buffer 8 for transfer to the display device 13. The system clock unit 12 which stores the temporarily stored data and the key input data and the comparison data input by the user in the scheduled recording and uses them in the RAM 9 to generate a basic clock of the system for controlling the program and driving the system. The data signal input / output between the service code decoder 51, the memory 53, and the display device 13 is controlled by the timing / control logic 11 by the clock signal of FIG. The data stored in the RAM 9 is transferred to the display device 13 having a 7-segment through the buffer 10 for display.

3 is a waveform diagram of a vertical synchronization signal in the time automatic setting apparatus of the present invention, as shown in FIG. 3, time information including year, month, and day, and other services in the service code of the vertical blanking interval of the vertical synchronization signal. Indicates that it contains information.

4 is a signal flow diagram of the operation of the automatic time setting device of the present invention. As shown in FIG. 4, when the power is turned on, the display device 13 is reset by the control of the timing / control logic 11, and the tuner ( 1) When the synthesized video signal received by the service code decoder 51 decodes the time information of the vertical blanking interval and transmits it to the microcomputer 52, the decoded data is stored in the RAM 9 and the timing / control logic Under the control of (11), the display device 13 sequentially displays the display device 13 through the buffer 10.

As described in detail above, in the present invention, since the time information transmitted from the broadcasting station is the standard time of the country, when the user displays the time on the display device, the user can always know the exact time and can record at the correct time during the reservation recording. There is.

Claims (3)

A service code decoder unit for extracting information included in a vertical regression section for decoding the received broadcast signal, a microcomputer for storing and controlling time information of the decoded data, and displaying time information under control of the microcomputer Time automatic setting device using a broadcast signal comprising a display device. 2. The service code decoder of claim 1, wherein the service code decoder comprises a sync separator that separates a vertical sync signal from a broadcast signal, and a data line decoder that detects time information on a vertical retrace section according to the separated vertical sync signal. Automatic time setting device using a broadcast signal. The apparatus of claim 1, wherein the microcomputer comprises a RAM for storing the decoded information and a controller for sequentially displaying the stored information on a display device.