KR19980078793A - Reservation time correction method for reservation recording of satellite broadcasting signal - Google Patents

Abstract

According to the present invention, when a video tape recorder receives KBPS data superimposed on a satellite broadcast signal for reservation recording setting of the satellite broadcast, the present invention is directed to transmission characteristics of satellite broadcasts generated for reserved time data included in the KBPS data. The present invention provides a reservation time correction method for reservation recording of a satellite broadcast signal to compensate for a time error by a preset correction time.

To this end, the present invention provides a first step for receiving KBPS data superimposed in the vertical retrace period of the satellite broadcast signal according to the selection of the satellite broadcasting channel, and for a broadcast recording target program included in the received KBPS data. A second step of performing time correction by adding a preset correction time from the reservation time data, and displaying a reservation recording start time for a predetermined broadcast program reserved for recording through the KBPS data as a time corrected by the correction time; In the third step, the fourth step of executing the reservation recording function when the time of the time elapses to the corrected time; and the reservation recording operation is stopped when the reservation recording end time of the broadcast program elapses to the time corrected by the correction time. It is characterized by consisting of a fifth step.

Description

Reservation time correction method for reservation recording of satellite broadcasting signal

The present invention relates to a reservation time correction method for reservation recording of a satellite broadcast signal, and more particularly, to a reservation recording time for a broadcast program subject to a reservation recording when receiving KBPS data superimposed on a satellite broadcast signal and transmitted from a video tape recorder. The present invention relates to a reservation time correction method for reservation recording of a satellite broadcast signal to compensate for a time error caused by a transmission state through a satellite satellite.

Conventionally, in a general television, a channel having a plurality of VHF bands and UHF bands transmitted from a plurality of television stations in the form of airwaves is tuned to play a video / audio. In the case of a broadcast channel having such a VHF band and a UHF band, The number of channels that can be used is limited, which acts as an obstacle to multi-channelization due to the increasing trend of information.

Therefore, recently, in order to multi-channel high quality television broadcasting, a television broadcasting signal transmitted from a terrestrial television broadcasting station is used by using a broadcasting satellite (BS) or a communication satellite (CS). By relaying and re-dividing to the ground, a satellite broadcasting system is adopted to receive and reproduce the satellite broadcasting signal from a television equipped with a parabola antenna.

According to the satellite broadcasting transmission system, the FM signal is modulated by multiplexing the video signal and the audio signal. When the video signal band is 4.5MHz, the PCM processing of the 1.3MHz band audio signal is 5.727272MHz. Quadrature Phase Shift Keying (QPSK) signal, multiplexed to video signal, FM-modulated 12 GHz main carrier, 17MHz for video and 6,5MHz for audio, On the other hand, it is possible to transmit at 14 GHz, while the satellite side can receive the transmitted signal and then convert the frequency into 12 GHz.

In a receiver for receiving such a satellite broadcast signal with an appropriate sensitivity, a parabolic antenna for receiving a SHF frequency signal of 3 to 13 GHz with a good sensitivity is provided, and a radio wave signal received from the parabola antenna is set at a frequency of 1/10. Low noise block-down converter (LNB) is provided as a low noise and low amplifying converter. On the tuner side of a television or video tape recorder, a low noise and low amplified satellite broadcast signal is channeled through a predetermined broadcast channel. The conversion is supplied to the video / audio signal processing means so as to be reproduced.

In addition, such satellite broadcast signal has a digital format of KBPS with various reservation recording information such as broadcast name or broadcast time, that is, reservation time of the broadcast program to add convenience to the reserved recording function for the corresponding broadcast program. Korea Broadcasting Program System) allows data to be superimposed within the vertical retrace period of the video signal, and the video tape recorder with satellite broadcasting reception function makes reservation recording for various satellite broadcasting programs simple and quick through such KBPS data. It can be done.

However, in the case of such a satellite broadcast signal, a broadcast signal transmitted from a television broadcast station or an earth station is somewhat received until it is received by a video tape recorder having a corresponding satellite broadcast reception / recording function via a broadcast satellite or a communication satellite corresponding to a repeater. As time elapses, even if a reservation time for a broadcast program is provided in the KBPS data superimposed on the satellite broadcast signal, an incorrect time is provided corresponding to the elapsed time of the broadcast program. If a reservation recording setting is made through the KBPS data in a video tape recorder, an incorrect reservation recording is performed.

Accordingly, the present invention has been made in view of the above circumstances, and when the video tape recorder receives KBPS data superimposed on a satellite broadcast signal for reservation recording setting of the satellite broadcast, the reservation time data included in the KBPS data. It is an object of the present invention to provide a reservation time correction method for reservation recording of a satellite broadcast signal to compensate a time error for a transmission characteristic of a satellite broadcast generated by a predetermined correction time.

According to the reservation time correction method in the reservation recording of the satellite broadcast signal according to the present invention to achieve the above object, receiving the KBPS data transmitted overlapping in the vertical retrace period of the satellite broadcast signal according to the selection of the satellite broadcast channel; Step 1, a second step of performing a time correction by adding a preset correction time from the reservation time data for the reservation target recording program included in the received KBPS data, the predetermined predetermined recording through the KBPS data A third step of displaying the scheduled recording start time for the broadcast program as the corrected time by the correction time, a fourth step of executing the reserved recording function when the time is passed to the corrected time, and the reservation of the broadcast program If the recording end time has elapsed to the time corrected by the correction time, the fifth step of stopping the reservation recording operation is performed. A reservation time correction method is provided for reservation recording of a satellite broadcast signal.

According to the present invention configured as described above, in the video tape recorder having a function of receiving and recording satellite broadcasts, preset reservation time for each broadcast program is corrected in KBPS data transmitted for automatic reservation recording of satellite broadcast programs. By performing the time correction processing in addition to the time, the reservation recording function can be performed in accordance with the passage of the corrected time.

1 is a block diagram showing a video tape recorder employing a reservation time correction apparatus for reservation recording of a satellite broadcast signal for explaining the method of the present invention;

2 is a flowchart for explaining the operation of the reservation time correction method in the reservation recording of the satellite broadcast signal according to the present invention.

Explanation of symbols on the main parts of the drawings

2: satellite antenna, 4: BS converter,

6: receiving antenna, 8: tuner,

10: video IF unit, 12: mode switching unit,

14: signal output section, 16: image modulation processing section,

18: signal amplification part, 20: recording / reading switch part,

22: signal recording / reading section, 24: tape driving mechanism,

26: preamplification unit, 28: image demodulation processing unit,

30: synchronous separator, 32: data slicer,

34: KBPS decoder, 36: function setting section,

38: data memory, 40: timer,

42: control unit.

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 video tape recorder employing a reservation time correction apparatus for reservation recording of a satellite broadcast signal for explaining the method of the present invention. In FIG. The BS shows a parabolic antenna that receives satellite broadcast signals in the 13 GHz band, and 4 denotes a BS converter which performs low noise and low amplification of the satellite broadcast signals received through the parabola antenna 2 in a frequency band of about 1/10 of a reception frequency. Indicates.

In addition, reference numeral 8 denotes a corresponding broadcast in a plurality of channels in the form of airwaves received by the channel tuning data for tuning a broadcast channel of a predetermined VHF band or UHF band, which will be described later, to the reception antenna 6. Not only transmits the channel, but also receives the channel tuning data for channel conversion of the satellite broadcasting signal and tunes the satellite broadcasting signal to the corresponding broadcasting channel, and converts the tuned satellite broadcasting signal into the form of an intermediate frequency signal and outputs it. 8 shows an image IF unit for amplifying the intermediate frequency of the selected satellite broadcast signal.

Reference numeral 12 denotes a mode switching unit which performs a mode switching operation in accordance with the switching control of the reserved recording mode or the tape reproducing mode by the controller 42, which will be described later, and 14 is reproduced from the video tape by executing the tape reproducing mode. A signal output unit for receiving an image information signal through the mode switching unit 12 and outputting it to a video output device such as a television.

Reference numeral 16 denotes an image modulation processing unit which modulates and outputs a satellite broadcast signal tuned through the tuner 8 or a video signal according to a normal television broadcast via the mode switching unit 12 so as to be recorded. Denotes a signal amplifier for amplifying the signal modulated video signal to a recordable amplification level.

Further, reference numeral 20 denotes that the video signal to be recorded through the signal amplifier 18 can be recorded on the video tape in response to the mode switching state of the reserved recording mode or the tape playback mode, and is read from the video tape. A recording / reading switch section for providing a signal path for the video information signal to be passed for video reproduction, and 22 is composed of a plurality of magnetic heads provided on the head drum, and the video tape is rotated by the head drum. Indicates a signal recording / reading section called reading of the video information recorded on the recording surface or recorded on the videotape.

Reference numeral 24 denotes a tape driving mechanism which performs servo control under the control of the control unit 42, which will be described later, and performs the motor drive for the constant speed rotation of the head drum provided with the signal recording / reading unit 22 or the driving of the video tape. Indicates.

Reference numeral 26 denotes a preamplifier which pre-amplifies the image information signal read by the signal recording / reading unit 22 via the recording / reading switch unit 20, and 28 denotes the amplification process. And an image demodulation processing unit for reproducing and demodulating the video information signal from the video tape.

Further, reference numeral 30 denotes a synchronization separator for separating a synchronization signal from the satellite broadcast signal tuned through the tuner 8, and 32 denotes digital data superimposed within the vertical retrace period by the separated synchronization signal. A data slicer for performing a data slice operation is shown. 34 denotes a KBPS decoder for decoding and outputting the extracted digital data, that is, KBPS data in the form of recognizable data.

Further, reference numeral 36 is a matrix button unit provided in a predetermined portion of the remote control unit for remote control or the main body of the main body, and the channel switching for recording operation for the normal broadcasting channel and satellite broadcasting channel of the VHF band or the UHF band, and the reception A function setting section for performing a key operation for reservation recording setting of a predetermined broadcast program through reservation recording setting data for the broadcast program of the received KBPS data.

Reference numeral 38 denotes a reservation recording setting after the time error generated in the relay transmission process of the satellite broadcast is corrected for the reservation recording setting data of the broadcast program in the KBPS data received and decoded through the KBPS decoder 34. A data memory for storing data is shown, and 40 denotes a timer for timing the recording start / end time of the reservation recording setting data through the KBPS data as the time after the time error caused by the satellite broadcasting characteristic is corrected.

Further, reference numeral 42 is a control unit which performs general execution control for reservation recording (or instant recording) and tape playback of the video tape recorder according to the key operation of the function setting unit 36. The reservation start / end time for each broadcast program in the reservation recording setting data of the broadcast program included in the KBPS data from the KBPS decoder 34 is added to the preset correction time to correct the time, and at the corrected time The control operation is executed so that the reservation recording function can be executed.

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, in step 44, when the channel setting of the satellite broadcasting channel is made by the function setting unit 36, the control unit 42 transmits channel tuning data for tuning the satellite broadcasting channel to the tuner 8 so that the satellite antenna ( 2) and the satellite broadcast signal through the BS converter (4) can be tuned.

Accordingly, the synchronization separator 30 separates the synchronization signal from the satellite broadcast signal amplified by the intermediate frequency through the image IF unit 10, and the KBPS decoder 34 extracts the KBPS data extracted through the data slicer 32. Is decoded in the form of recognizable data.

At this time, in step 45, the controller 42 receives the decoded KBPS data received through the KBPS decoder 34 and decoded the reservation start data designated for each broadcast program in the reservation recording setting data included in the KBPS data. After correcting the time by adding the corrected time and the addition process for the time and the reservation end time, the reserved recording setting data with the corrected time is stored in the data memory 38.

In that state, the process proceeds to step 46, and the control section 42 determines whether or not the reserved recording setting of the predetermined broadcast program is made through the KBPS data by the key operation of the function setting section 36.

As a result of the determination in step 46, when it is determined that the function setting unit 36 is performing a key operation for performing the reservation recording setting through the KBPS data, the reservation recording setting of the KBPS data stored in the data memory 38 is performed. After the reservation recording setting for the predetermined broadcast program is made in accordance with the data, the flow advances to step 47 to determine whether the reservation start time corrected by the preset correction time has elapsed. Will be executed.

At this time, the process proceeds to step 48, and the controller 42 determines whether or not the clock time of the timer 40 has elapsed to the reservation start time corresponding to the corrected time.

As a result of the determination in step 48, if it is determined that the time clock of the timer 40 has elapsed to the reservation start time, the control proceeds to step 49 so that the satellite broadcasting channel to be reserved and recorded through the tuner 8 is tuned. While the mode switching unit 12 switches the mode according to the reserved recording mode, the tape drive mechanism 24 is controlled to control the signal recording / reading unit 22 to record the signals and to record the video signals of the satellite broadcasting. By traveling, the reservation recording operation is started.

Subsequently, the process proceeds to step 50, and the controller 42 determines whether or not the clock time of the timer 40 has elapsed to the reservation end time corresponding to the time corrected by the preset correction time.

As a result of the determination in step 50, if it is determined that the clock time of the timer 40 has elapsed as the reservation end time, the control proceeds to step 51 to terminate the reservation recording operation, and then another reservation recording operation or tape Enter the standby state for regeneration.

According to the present invention made as described above, in the video tape recorder having a function of receiving and recording satellite broadcasting, the reservation time of the reservation recording setting data of the KBPS data superimposed on the satellite broadcasting signal and transmitted is corrected as an accurate time, As the scheduled recording execution time can be accurately made, the accurate recording of the time is possible regardless of the time error caused by the satellite broadcasting of the satellite broadcasting.

Claims (1)

A first step of receiving KBPS data superimposed in a vertical retrace period of the satellite broadcasting signal according to tuning of the satellite broadcasting channel; A second step of performing time correction by adding a preset correction time to the reservation time data for the broadcasting program of the reserved recording target included in the received KBPS data; A third step of time-reserving a reservation recording start time for a predetermined broadcast program set by reservation recording through the KBPS data as a time corrected by the correction time; A fourth step of executing a reservation recording function when the time is passed by the corrected time; And a fifth step of stopping the reservation recording operation when the reservation recording end time of the broadcast program has elapsed at the time corrected by the correction time.