KR19990056484A - Time Control Method of Satellite Broadcast Receiver - Google Patents

Abstract

The present invention relates to a time control method of a satellite broadcast receiver capable of matching the time of an external device connected to the satellite broadcast receiver with the time of the satellite broadcast receiver using a standard time embedded in the satellite broadcast signal. Setting a predetermined period for updating time information of the external device; A second step of checking the set predetermined period while the satellite broadcasting receiver is powered on; A third step of extracting standard time information from the additional information inserted into the satellite broadcast signal when the set period is reached; A fourth step of transmitting the extracted standard time information to the external device; And a fifth step of updating time information set in the external device based on the transmitted standard time information.

Description

Time Control Method of Satellite Broadcast Receiver

The present invention relates to a satellite broadcast receiver, and more particularly, to a time control method of a satellite broadcast receiver suitable for efficiently controlling a timer of an external device (eg, TV, VCR) connected to the satellite broadcast receiver. will be.

In recent years, the broadcast method using satellites, which is rapidly expanding its use, is a method of providing broadcast signals to a wider area by using satellites (communication satellites) located at an altitude of about tens to hundreds of kilos on the earth's surface. In this satellite broadcasting system, for example, a Ku band RF signal having a frequency band of 11.7 GHz to 12.0 GHz is used.

To this end, the antenna for satellite broadcasting reception is provided with a low noise blockdown converter for converting a radio frequency (RF) signal of a very high frequency into an intermediate frequency (IF) signal, which is a high frequency RF signal. Is converted into an IF (intermediate frequency) signal in the hundreds to thousands of MHz bands (for example, 950 MHz to 2050 MHz) that can be received by a satellite broadcasting receiver (receiver).

Therefore, in the satellite broadcasting tuner provided in the satellite broadcasting receiver (receiver), the IF signal received through the low noise converter is inputted to tune the channel selected by the user. The satellite broadcasting receiver maximizes channel utilization, image and sound. Along with the improvement of signal quality and the ease of transmitting additional digital service data, the significant improvement of the user interface is a big advantage.

Meanwhile, various signals such as broadcast signals (video data and audio data), event information table (EIT), and time data table (TDT) for each channel are included in a satellite signal provided from a satellite, that is, a bit stream.

When the satellite broadcasting receiver is powered on, the various kinds of information are stored in a predetermined area of the memory means provided in the satellite broadcasting receiver and displayed on various menu screens at the request of the user. The information includes program information for each channel, detailed information about each program, and standard time information.

On the other hand, such a satellite broadcast receiver is connected to an external device (active or VCR) to display the received broadcast signal on the screen or to record the received broadcast signal on a recording medium (eg, a tape).

Each external device typically includes a timer for controlling the system, and displays the time counted by the timer, so that the user can check the time set in the system.

However, if you want to change the time set inside the system from an external device connected to such a satellite broadcasting receiver, if the time set on the external device has an error and you want to update it, the user must manually update the time by operating the external device. There was an inconvenience in that, when the time of the satellite broadcasting receiver and the time set in the external device, especially the VCR does not coincide with each other, there was a problem causing a malfunction in performing the scheduled recording.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, a satellite broadcast which can automatically update the time of the external device connected to the satellite broadcast receiver using the standard time inserted into the satellite signal and provided to the satellite broadcast receiver. It is an object of the present invention to provide a method for controlling a time of a receiver.

In order to achieve the above object, the present invention receives broadcast signals for a plurality of satellite broadcast channels provided through satellites and various additional information inserted in the broadcast signals, and performs data transmission and processing with each other in cooperation with external devices. A time controlling method of a satellite broadcasting receiver, comprising: a first step of setting a predetermined period for updating time information of the external device; A second step of checking the set predetermined period while the satellite broadcasting receiver is powered on; A third step of extracting standard time information from the additional information inserted into the satellite broadcast signal when the set period is reached; A fourth step of transmitting the extracted standard time information to the external device; And a fifth step of updating time information set in the external device based on the transmitted standard time information.

1 is a block diagram of a satellite broadcasting receiver suitable for applying a time control method according to an embodiment of the present invention;

2 is a view for explaining a time control method according to a preferred embodiment of the present invention.

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

110: key input unit 120: microcomputer

130 tuner and demodulator 140 memory unit

150: MPEG Decoder 160: Video Encoder

170: OSD unit 180: image synthesizing unit

210: control unit 220: timer

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a satellite broadcasting receiver suitable for applying a time control method according to an exemplary embodiment of the present invention. The key input unit 110, the microcomputer 120, the tuner and demodulator 130, and the memory unit ( 140, a satellite broadcast receiver including an MPEG decoder 150, a video encoder 160, an OSD unit 170, and an image synthesizer 180, and an external device including a controller 210 and a timer 220. .

The external device 200 described above is an A / V (audio / video) device connected to a satellite broadcast receiver. Examples of the external device 200 include a TV, a VCR, and an audio device.

Referring to FIG. 1, the key input unit 110 is configured with key metrics on a remote controller or its own panel to generate a corresponding key signal by a user's operation and provide the corresponding key signal to the microcomputer 120, and the microcomputer 120 provides a key. Each control signal is generated based on a key signal from the input unit 110 to perform a corresponding function. For example, a user processor selects a user broadcast channel from the outside, including a microprocessor that controls overall operation of the receiver. When a signal is input, a corresponding tuning control signal is generated and provided to the tuner and demodulator 130 to be described later.

The tuner and demodulator 130 tunes a broadcast channel selected by a user in a broadcast signal received through a broadcast signal receiver (ie, a satellite reception antenna), not shown, based on a tuning control signal provided from the microcomputer 120. The tuned broadcast channel signal is restored to a transport stream through a process of converting to an intermediate frequency, demodulation, and error correction, and the restored transport stream is provided to the next MPEG decoder 150.

In this case, the microcomputer 120 stores various additional information output from the tuner and the demodulator 130 in a predetermined region of the memory unit 140, and stores the standard time information inserted into the satellite broadcast signal at a predetermined time (eg, For example, the data is transmitted to the external device 200 every 1 hour.

On the other hand, in the MPEG decoder 150, on the basis of the control signal provided from the microcomputer 120, the compressed and encoded audio and video signals of the broadcast channel provided from the tuner and demodulator 130, In consideration of spatiotemporal and spatial correlation, the compressed and encoded video signal is restored to the original signal before encoding by using a decoding technique such as variable length decoding, inverse DCT, inverse quantization, and motion compensation, and the restored digital broadcast video signal The next stage is provided to the video encoder 160, the reconstructed audio signal is provided to an audio signal processor not shown.

In addition, the video encoder 160 converts the selected digital broadcast video signal provided by the MPEG decoder 150 to an NTSC or PAL analog video signal and then provides the image synthesizer 180 to the video synthesizer 180. The OSD unit 170 In addition, various menu screen information and message information provided from the microcomputer 120 are configured as a guide screen in a predetermined form and provided to the image synthesizing unit 180.

Accordingly, the image synthesizing unit 180 transfers the analog satellite broadcasting signal output from the video encoder 160 to a display side, not shown, or omits a screen in which various menu screen data displayed through the OSD unit 170 are mixed. To the display side.

On the other hand, the control unit 210 of the external device 200 is connected to the satellite broadcast receiver to control the overall operation of the system, in particular to the timer 220 whenever the time information is provided from the microcomputer 120 of the satellite broadcast receiver. The set time is updated.

FIG. 2 is a flowchart illustrating a time control process of a satellite broadcast receiver according to an exemplary embodiment of the present invention. Referring to FIG.

The satellite broadcast receiver configured as described above and the external device 200 are connected to each other for data transmission, and a predetermined period for updating time information of the external device is preset, and the operation of the satellite broadcast receiver is selected by the user. While operating in a normal viewing mode in which a broadcast signal of a specific channel is received and displayed through a predetermined signal processing process or a standby mode for performing a specific command input from the key input unit 110 (step 201), the microcomputer 120 Checks a predetermined period (for example, one hour) preset in the memory unit 140 using an internal counter (not shown).

When the predetermined period is reached (step 203), the satellite signal is received through the tuner and demodulator 130 (step 205), and standard time information is extracted from the received satellite signal (step 207). The extracted current time information is transmitted to a TV or VCR connected separately to step S209.

At this time, the control unit 210 of the external device 200 that has received the standard time information from the satellite broadcast receiver updates the time counted by the timer 220 based on the standard time transferred (step 211).

As a result, the time set in the external device can be automatically updated by transmitting the standard time information inserted in the satellite broadcast signal to the external device at predetermined intervals.

As described above, according to the present invention, there is an effect of automatically updating the time set in the external device while the satellite broadcast receiver and the external A / V device are connected, and prevent a malfunction of the reservation function of the satellite broadcast receiver. It can be effective.

Claims (1)

In a time control method of a satellite broadcast receiver for receiving a broadcast signal for a plurality of satellite broadcast channels provided through a satellite and various additional information inserted in the broadcast signal, and interworking with an external device to perform data transmission and processing therebetween. , Setting a predetermined period for updating time information of the external device; A second step of checking the set predetermined period while the satellite broadcasting receiver is powered on; A third step of extracting standard time information from the additional information inserted into the satellite broadcast signal when the set period is reached; A fourth step of transmitting the extracted standard time information to the external device; And a fifth step of updating time information set in the external device based on the transmitted standard time information.