KR20020007655A - Method and apparatus for updating program of digital TV - Google Patents

Abstract

PURPOSE: An apparatus and a method for updating program of a digital TV are provided to operate a CPU, a tuner, a TP DEMUX and memories only when change of service or download of program is required in standby mode, thereby minimizing power consumption at standby mode. CONSTITUTION: An apparatus for updating program of a digital TV having a tuner(203), a DEMUX(204) and a memory(205) includes an RSMS(104) for outputting a system wake-up signal when new service information exists in standby mode, a modem(201) for detecting the wake-up signal, and a CPU(202) that supplies power to the tuner, DEMUX and memory when the modem detects the system wake-up signal and stops power supply to the tuner, DEMUS and memory when a corresponding load has been updated according to information inputted from the RSMS.

Description

Program update apparatus and method of digital TV {Method and apparatus for updating program of digital TV}

The present invention relates to a TV, and more particularly, to an apparatus and method for updating a program of a digital TV.

In general, digital TVs have recently been developed with the development of TV technology to transmit broadcast signals, and accordingly, interest in digital TVs using the digital transmission method has increased. It was launched and began digital test broadcasting in July 1996. Unlike conventional satellite broadcasting, Mugunghwa satellite broadcasting is SDTV-class digital broadcasting, which is almost no different from the terrestrial digital broadcasting.

In general, a time stream multiplexed with video, audio, and additional information to be transmitted in digital satellite broadcasting is called a transport stream (TS), which is QPSK modulated and transmitted to each receiver through satellite. do.

In addition, specific information multiplexed by the TS is largely divided into an elementary stream and an resource & subscriber management system (RSMS) stream.

The elementary stream includes video information transmitted from an analog broadcast, audio information, and data added from a digital broadcast. The primary purpose for broadcasting is to send an elementary stream, and an RSMS stream is additional information.

In this case, the RSMS stream is divided into service information (SI) and RSMS message, and the RSMS message is transmitted only when the limited reception function is used, and the SI is program designation information for enabling the receiver to demultiplex the TS. PSI (Program Specific Information) and program guide information PMM (Program Guide Message) is divided into.

In the current digital TV system, a part that should always operate in the standby mode is defined in order to properly respond to the broadcasting environment, that is, the digital TV receiver according to the change of broadcasting channel and service.

In other words, the parts that should be operated at all times in order to respond to the receiver according to the program download and service change in the digital TV system include CPU, tuner, TP demux, modem, etc., and power and current supplied to the tuner are consumed in the standby mode. It acts as a major source of power.

Hereinafter, an apparatus and method for updating a program of a digital TV according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram showing a program update apparatus for a digital TV according to the prior art, and FIG. 2 is a flow chart showing a program update method for a digital TV according to the prior art.

The program update apparatus for a digital TV according to the related art is largely composed of a digital TV transmission system 10 and a digital TV reception system 20.

The digital TV transmission system 10 includes a new SI 11 that provides new service information and a multiplexer that multiplexes new service information and PSI output from the new SI 11 into a transport stream form ( 12), a transmitter 13 for receiving a transport stream output from the multiplexer 12 and transmitting it as a high frequency signal, and an RSMS 14 for transmitting additional information.

The digital TV reception system 20 receives a high frequency signal output from the transmitter 13 and is input through a tuner 21 for tuning a channel desired by a user and a channel tuned by the tuner 21. A TP demux 22 for receiving a high frequency signal and separating the image, audio and additional information data, and a video and audio signal separated from the TP demux 22 can be received and displayed on the screen, and a speaker 24 Decoder 23 to decode to be outputted through the AH, a display unit / speaker 24 to output a video and audio signal decoded by the decoder 23, and a corresponding part through data communication with the RSMS 14. A modem 25 for communication for updating, a CPU 26 for updating a corresponding part when a signal is input to the modem 25, and controlling the update information to be stored, and a control signal of the CPU 26. Update information It consists of a memory 27 for storing.

The program updating apparatus of the digital TV according to the prior art uses the modem 25 as a return path to implement an interactive service such as Pay Per View (PPV), Conditional Access (CA), Interactive Game, and Home Shopping. In standby mode, power is always supplied to parts for updating such as the tuner 21, the TP demux 22, the CPU 26, the memory 27, and the like.

The tuner 21 receives a high frequency signal from the transmitter 13 and converts it into a transport stream form, the TP demux 22 parses various PSI information and SI information, and the CPU 26 parses the The information is converted into a database for each function and stored in the memory 27.

Referring to FIG. 2, the method of updating a program for updating a program of a digital TV according to the related art, first, it is determined whether a standby mode is established (S1).

Subsequently, the determination result S1 determines whether new service information SI exists in the standby mode (S2).

As a result of the determination (S2), if new service information (SI) exists, the service information of the corresponding part is updated (S3).

Then, it is determined whether a predetermined predetermined time has elapsed, and when the time elapses, the process returns to the initial stage S1 (S4).

That is, the control unit always checks whether there is newly updated service information (SI) in the demux even in the standby mode, and if it is updated, reconfigures the new service information (SI) into a new database and stores it in the memory 27. .

Therefore, the CPU 26 must always be supplied with power to loads such as the tuner 21, the TP demux 22, the memory 27, etc. in order to check whether the SI is updated at regular intervals.

As described above, the program and apparatus for updating a digital TV according to the prior art has a problem in that power consumption is increased because power must always be supplied to parts for updating in the standby mode in addition to the normal mode for watching the digital TV.

The present invention has been made to solve the above problems, and the CPU, tuner, TP demux and memory can be operated only when the service change or program download is required in the standby mode to minimize the power consumption in the standby mode. The purpose of the present invention is to provide an apparatus and method for updating a program of a digital TV.

1 is a block diagram showing an apparatus for updating a program of a digital TV according to the prior art.

2 is a flowchart illustrating a program update method of a digital TV according to the related art.

3 is a block diagram showing an apparatus for updating a program of a digital TV according to the present invention.

4 is a flowchart illustrating a program update method of a digital TV according to the present invention.

Explanation of symbols for main parts of drawings

100: digital transmission system 101: PSI

102: SI 103: multiplexer

104: RSMS 105: transmitter

200: digital receiving system 201: modem

202: CPU 203: tuner

204: TP Demux 205: Memory

The digital TV power supply control apparatus according to the present invention for achieving the above object in the digital TV equipped with a tuner, demux and memory, the system wake-up signal in the presence of new service information in the standby mode An output RSMS, a modem detecting a system wake-up signal output from the RSMS, and a system wake-up signal detected by the modem to the tuner, demux and memory. It is characterized in that it comprises a CPU for supplying power and updating the load in accordance with the information input from the RSMS to cut off the power supply of the tuner, demux and memory when the update is completed.

The program update method of the digital TV according to the present invention for achieving the above object is a power control method of a digital TV having a tuner, a demux, a memory and a modem, when the standby mode is set to the tuner, the demux and the memory Turning off the power supply, driving only the modem, supplying power to the tuner, demux, and memory when a system wake-up signal is detected through the modem; Updating service information of a corresponding load according to update information input when power is supplied to a mux and a memory; and when the service information update of the corresponding load is completed, the power supply to the tuner, the demux and the memory is cut off, and the modem The step includes the step of continuing to drive, and the step of returning to the initial stage after a predetermined set time has elapsed To have those characteristics.

Hereinafter, an apparatus and method for updating a program of a digital TV according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a block diagram showing a program update device of the digital TV according to the present invention, Figure 4 is a flow chart showing a program update method of the digital TV according to the present invention.

As shown in FIG. 3, the apparatus for updating a program of a digital TV according to the present invention includes a digital TV transmission system 100 and a digital TV reception system 200.

The digital TV transmission system 100 includes a PSI 101 that provides video, audio, and additional information data, an SI 102 that provides new service information, software and broadcast service information to be upgraded, and the like. A multiplexer 103 for receiving the outputs of the PSI 101 and the SI 102 and multiplexing them into a transport stream, and a transmitter 105 for converting and transmitting the transport stream output from the multiplexer 103 into a high frequency signal. RSMS 104 outputting a corresponding command to the transmitter 105 and transmitting a wake-up signal to the digital receiving system 200 when updating information or downloading of a new program is required. It consists of.

The digital TV receiving system 200 includes a modem 201 for detecting whether a wake-up signal is transmitted from the RSMS 104 in a standby mode, and a wake-up at the modem 201. When a wake-up signal is detected, the CPU 202 outputs a control signal to wake-up all loads required for the update, and the transmitter (according to the control signal of the CPU 202). Tuner 203 for tuning a desired channel from the broadcast signal transmitted from 105 and transport data in the form of a transport stream input through the channel tuned through the tuner 203 into video and audio additional information data. TP demux 204 and a memory 205 for storing the update information or the program upgrade information according to the control signal of the CPU 202.

Referring to the operation of the program update apparatus of the digital TV according to the present invention configured as described above are as follows.

First, the CPU 202 detects whether the user has set the standby mode. When the standby mode is set, the CPU 202 stops the power supply to the tuner 203, the TP demux 204, the memory 205, and the like. Only supply power to 201).

The modem 201 determines whether a wake-up signal is input from the RSMS 104.

When a wake-up signal is input from the modem 201, the modem 201 outputs a control signal to the CPU 202, and the CPU 202 is the tuner 203 and the TP device. After controlling the power to be supplied to the mux 204 and the memory 205, the update information and new data are received from the transmitter 105, and the corresponding part is updated and stored.

In the program update method of the digital TV according to the present invention configured as described above, referring to FIG. 4, first, it is determined whether the standby mode is set (S11).

Subsequently, when the standby mode is set (S11), only the modem 201 is driven and power supply to the tuner 203, the TP demux 204, and the memory 205 is stopped (S12).

In operation S13, it is determined whether a system wake-up signal is input from the RSMS.

Subsequently, when the system wake-up signal is input from the RSMS (S13), the tuner 203, the TP demux 204, and the memory 205 are supplied with new update information and Prepare to receive upgrade information (S14).

Then, the corresponding part is updated according to the corresponding system update information (S15).

Subsequently, it is determined whether the updating of the system information of the corresponding part is completed (S16).

As a result of the determination (S16), when updating of the system information is completed, the power supply to the tuner 203, the TP demux 204 and the memory 205 is stopped and the system enters the sleep mode (S17).

Next, it is determined whether a predetermined predetermined time has elapsed (S18).

As a result of the determination (S18), when the predetermined time has elapsed, it returns to the initial routine, and when the predetermined time has not elapsed, the process returns to the step S16 (S19).

As described above, the apparatus and method for updating a program of a digital TV according to the present invention wakes up the receiving system of the digital TV using the modem 201 in a standby mode, and provides new system information. In order to receive a broadcast wave, a system wake-up signal is received from the RSMS 104 through a telephone network, and the modem 201 detects such a signal and needs to be updated. The signal is output to the CPU 202 to supply.

Therefore, in the standby mode, only the modem is alive, and if it is required to update the system information, the system wakes up and updates the system information. This is a wake-up state.

As described above, the apparatus and method for updating a program of a digital TV according to the present invention supplies power only to a modem in a standby mode, and does not supply power to other parts, but according to whether a system wake-up signal is transmitted through a telephone network. By selectively supplying power of a part to update service information, power consumption can be minimized.

Claims (3)

In a digital TV with tuner, demux and memory, RSMS to output a system wake-up signal in the presence of new service information in the standby mode; A modem detecting a system wake-up signal output from the RSMS; When the system wake-up signal is detected in the modem, power is supplied to the tuner, the demux and the memory, and the corresponding load is updated according to the information input from the RSMS. And a CPU for interrupting power supply to the mux and the memory. In the digital TV power control method comprising a tuner, demux, memory and modem, Turning off the power supply to the tuner, demux and memory when the standby mode is set, and driving only the modem; Supplying power to the tuner, demux, and memory when a system wake-up signal is detected through the modem; Updating service information of a corresponding load according to update information input when power is supplied to the tuner, the demux, and the memory; Interrupting power supply to the tuner, the demux, and the memory when the service information update of the corresponding load is completed; And, And a process of returning to an initial stage when a predetermined set time elapses. The method of claim 2, If the system does not detect a system wake-up signal And returning to an initial stage after a preset time elapses.