KR20080024380A - Portable broadcasting receiving apparatus and broadcasting signal detecting method for it - Google Patents

Abstract

A portable broadcasting receiving apparatus and a method for re-detecting a broadcasting signal thereof are provided to calculate a next broadcasting burst arrival forecast time by using a delta-T included in a header of a broadcasting sector lastly received, turn on the power of a broadcasting receiving unit when the next broadcasting burst arrival forecast time arrives, and re-detect a broadcasting signal to prevent unnecessary power consumption. A broadcasting receiving unit(110) receives a broadcasting burst. When the broadcasting burst is received in the broadcasting receiving unit(110), a clock storing unit(120) initializes a clock buffer. The clock storing unit(120) updates a broadcasting section receiving time in the clock buffer whenever each broadcasting section is received. When the reception of a broadcasting section is stopped while the broadcasting section is received, a control unit(130) calculates a broadcasting section receiving time of the lastly received broadcasting section stored in the clock buffer and a next broadcasting burst arrival forecast time by using previously received broadcasting information. A power control unit(140) turns off the power of the broadcasting receiving unit(110) before the next broadcasting burst arrival forecast time calculated by the control unit(130) arrives. The power control unit(140) turns on the power of the broadcasting receiving unit(110) when the next broadcasting burst arrival forecast time arrives, and resumes the reception of the broadcasting burst.

Description

Portable broadcasting receiving apparatus and broadcast signal detection method for it}

1 is a schematic diagram of a broadcast burst transmitted by a time slice method in an orthogonal frequency multiple modulation (OFDM) scheme;

FIG. 2 is a view showing a broadcast section forming a broadcast burst shown in FIG.

3 is a block diagram according to an embodiment of a portable broadcast receiving apparatus according to the present invention.

4 is a schematic view of a broadcast section for predicting the next broadcast burst arrival expected time of a portable broadcast receiver according to the present invention.

5 is a diagram illustrating waveform hunting (Delta-T Jitter) of a broadcast burst.

6 is a flowchart according to an embodiment of a broadcast signal redetection method of a portable broadcast receiver according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: portable broadcast receiver 110: broadcast receiver

120: clock storage unit 130: control unit

140: power control unit

The present invention relates to a portable broadcast receiver and a broadcast signal redetection method thereof, and to a broadcast burst detection technique in an orthogonal frequency division multiplex (OFDM) scheme.

Europe is adopting DVB (Digital Video Broadcasting) as a standard for digital TV broadcasting standardization. Standard standards that follow the DVB scheme include terrestrial broadcasting (DVB-T) standards, satellite broadcasting (DVB-S) standards, cable broadcasting (DVB-C), and portable broadcasting (DVB-H) standards.

The broadcast signal according to the digital video broadcasting (DVB) method is multiplexed by orthogonal frequency multiple modulation (OFDM) and transmitted in a time slice method. The time slicing method means that a broadcast signal multiplexed by an orthogonal frequency multiplexing (OFDM) method is not temporarily transmitted. The digital signal is intermittently transmitted in a burst form as shown in FIG.

The receiving terminal receiving the digital signal transmitted by the time slice method turns on the power of the broadcast receiver during the allotted time slot to receive the digital signal, and then powers the broadcast receiver up to the allocated time slot. It is turned off and then turned on again during the next assigned time slot to receive the digital signal. At this time, if the receiving terminal cannot detect the digital signal due to the surrounding environment, the receiving terminal turns on the power of the broadcast receiving unit and attempts to detect the signal continuously until the digital signal is detected. It causes the power consumption.

In recent years, the demand for DVB-H terminals suitable for portable terminal services has been increasing due to the increased portability and mobility of broadcast terminals. The biggest problem of the DVB-H terminals is that the power consumption is severe when the conventional broadcast signal detection technique is applied because the failure of the broadcast signal reception due to the movement of the terminal is large.

By the way, in the DVB-H standard, as shown in FIG. 2, Delta-T (Delta-T) indicating the arrival time of the next broadcast burst is indicated in the header of each broadcast section included in one burst. Contains time information. Therefore, if any of these broadcast sections are received, the DVB-H terminal is able to predict when the next burst will arrive.

Therefore, the present inventors calculate the estimated time of arrival of the next broadcast burst by using Delta-T included in the header of the last received broadcast section when the broadcast signal detection temporarily fails or fails continuously. When the power is turned off and the next broadcast burst arrives at the estimated time of arrival, the broadcast signal is turned on again to redetect the broadcast signal until the broadcast signal is detected. A study has been made on a portable broadcast receiver and a method for redetecting the broadcast signal thereof, which can prevent power consumption caused by the detection attempt.

The present invention has been invented under the above-mentioned purpose, and when the detection of a broadcast signal fails temporarily or continuously fails, the next broadcast burst arrives using the delta T included in the header of the last received broadcast section. The present invention provides a portable broadcast receiver and a method for redetecting the broadcast signal thereof, which can prevent unnecessary power consumption by calculating the time and re-detecting the broadcast signal by turning on the power of the broadcast receiver when the next broadcast burst arrival expected time is reached. For that purpose.

According to an aspect of the present invention for achieving the above object, the present invention initializes a clock buffer when a broadcast burst is received, each time a broadcast section is received, When a broadcast section reception time T _d is updated in the clock buffer, and reception is interrupted during broadcast section reception, the broadcast section reception time T _d and the last received broadcast of the last received broadcast section stored in the clock buffer. Estimated time of arrival of the next broadcast burst (T _nb ) from the sum of delta T ('Delta-T'), which is time information indicating when the next broadcast burst included in the section has arrived. = T _d + 'Delta-T') is calculated, and the power of the broadcast receiver is turned off until the next broadcast burst arrival expected time T _nb is reached, and when the next broadcast burst arrival estimated time T _nb is reached, the broadcast receiver It is characterized in that the broadcast burst reception is resumed by turning on the power.

Therefore, when the broadcast signal detection temporarily fails or continuously fails, the present invention calculates an estimated time of arrival of the next broadcast burst by using Delta-T included in the header of the last received broadcast section, and next broadcast. The power generated by continuously trying to detect a broadcast signal until a broadcast signal is detected when a conventional broadcast signal reception failure occurs by turning on the power of the broadcast receiver when the burst arrival expected time is reached and redetecting the broadcast signal. It has the advantage of preventing consumption.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

3 is a block diagram according to an embodiment of a portable broadcast receiving apparatus according to the present invention. As shown in the figure, when the broadcast signal detection temporarily fails or continuously fails, the portable broadcast receiving apparatus 100 according to the present invention has a delta T included in the header of the last received broadcast section. Calculate the estimated time of arrival of the next broadcast burst, turn off the power of the broadcast receiver, and turn on the power of the broadcast receiver to redetect the broadcast signal when the estimated time of arrival of the next broadcast burst is reached. The broadcast receiving unit 110, the clock storage unit 120, the control unit 130, and the power control unit 140 are included.

The broadcast receiver 110 receives a broadcast burst. A broadcast signal conforming to the DVB-H standard, which is modulated and multiplexed by an orthogonal encoding frequency division multiplexing (OFDM) scheme and transmitted, is received by the portable broadcast receiving apparatus 100. The broadcast burst transmitted intermittently during the allocated time slot is received through the broadcast receiving unit 110 of the portable broadcast receiving apparatus 100 according to the present invention, and demodulated (demodulated) in the form of an image or the like display unit (LCD, etc.) (Not shown).

When the broadcast burst is received by the broadcast receiving unit 110, the clock storage unit 120 initializes a clock buffer, and each time a broadcast section is received, the clock storage unit 120 receives a broadcast section reception time in the clock buffer. T _d ) is updated. That is, the clock storage unit 120 may determine the last broadcast section reception time used for calculating the next broadcast burst arrival time estimate when the broadcast burst reception received by the broadcast reception unit 110 temporarily fails or successively fails. T _d) to a configuration for storage, the final broadcasting section, the reception time (T _d) burst time (burst Duration initializes the clock buffer each time with a clock buffer that stores, and be a broadcast burst reception), i.e., the assigned Whenever a broadcast section arrives during a time slot, the clock buffer is updated by storing the broadcast section reception time T _d .

The control unit 130 controls the entire apparatus, but when the reception is interrupted during the reception of the broadcast section, the broadcast section reception time T _d of the last received broadcast section stored in the clock buffer and included in the last received broadcast section Estimated time of arrival of the next broadcast burst (T _nb ) from the sum of delta T ('Delta-T'), which is time information indicating the arrival time of the next broadcast burst. = T _d + 'Delta-T')

For example, referring to FIG. 4, assuming that the last received broadcast section is section 3, the header of the last received section 3 has a Delta-T representing time information until the next broadcast burst arrives. Since it is included, knowing only this last received broadcast section reception time T _d can calculate the estimated time of arrival of the next broadcast burst. That is, the estimated time of arrival of the next broadcast burst is a value obtained by adding up the last received broadcast section reception time (T _d ) and delta T (Delta-T), which is time information indicating the arrival time of the next broadcast burst.

The power control unit 140 turns off the power of the broadcast receiving unit 110 until the next broadcast burst arrival estimated time T _nb calculated by the controller 130, and the next broadcast burst arrival estimated time. When (T _nb ) is reached, the broadcast burst reception is resumed by turning on the power of the broadcast receiving unit 110. That is, when the reception is stopped during the reception of the broadcast section, the controller 130 calculates the next broadcast burst arrival expected time T _nb and requests the power control unit 140 to control the power of the broadcast receiving unit 110. The power control unit 140 controls the power of the broadcast receiving unit 110 to be turned off until the next broadcast burst arrival estimated time T _nb calculated by the control unit 130, and arrives at the next broadcast burst. When the expected time T _nb is reached, the broadcast burst reception through the broadcast receiver 110 is resumed by controlling the power of the broadcast receiver 110 to be turned on.

Therefore, in the present invention, when a broadcast signal detection temporarily fails or continuously fails during broadcast reception, Delta-T (Delta-T), which is time information indicating a reception time of a broadcast section of the last received broadcast section and a arrival time of the next broadcast burst, is disclosed. Calculate the estimated time of arrival of the next broadcast burst and implement the program to redetect the broadcast signal by turning on the power of the broadcast receiver when the expected time of arrival of the next broadcast burst is reached. In spite of the time interval in which no signal is transmitted, unlike the unnecessary power consumption caused by continuing to detect the broadcast signal until the broadcast signal is detected, do not attempt to redetect the broadcast signal in the time interval in which the broadcast signal is not transmitted. Instead, the broadcast signal redetection is performed only in the section predicted as the time interval in which the broadcast signal is transmitted. Also it is possible to prevent unnecessary power consumption by.

Meanwhile, according to an additional aspect of the present invention, when the next broadcast burst arrival expected time T _nb is reached, the broadcast receiving unit 110 is turned on by the power control unit 140 so that the broadcast burst reception is performed. When resuming, the controller 130 may compensate for an error T _j due to waveform-t jitter caused by irregular electrical signals, thereby preventing unnecessary power consumption.

In other words, this embodiment is intended to prevent unnecessary power consumption due to an error in the estimated time of arrival of the next broadcast burst which may be caused by a waveform-t jitter caused by an irregular electrical signal as shown in FIG. As an embodiment to compensate for the error (T _j ), when the broadcast burst reception is resumed because the power of the broadcast receiver 110 is turned on, the number of times the broadcast burst is missed continuously (n) It may be to attempt the broadcast burst detection for 2 times the value multiplied by the error T _j due to waveform hunting, that is, 2 nT _j time. If a broadcast burst is detected for 2nT _j time, the controller 130 controls to receive a broadcast burst through the broadcast receiver 110, and if the broadcast burst is not detected for 2nT _j time, the controller ( Preferably, the control unit 130 controls the power of the broadcast receiving unit 110 to be turned off through the power control unit 140.

Therefore, the invention according to this embodiment reaches a next broadcast burst arrival time (T _nb ) when the power of the broadcast receiving unit 110 is turned on (ON), the maximum 2n times the waveform hunting caused by the irregularity of the electrical signal By attempting to detect a broadcast burst until then, it is determined whether to receive a broadcast burst or to turn off the power of the broadcast receiver 110 according to whether a broadcast burst is detected, thereby predicting the next broadcast burst arrival that may be caused by waveform hunting caused by an irregular electrical signal. Unnecessary power consumption due to the error can be prevented.

A broadcast signal redetection operation of the portable broadcast receiver according to the present invention having the above configuration will be described with reference to FIG. 6. 6 is a flowchart according to an embodiment of a broadcast signal redetection method of a portable broadcast receiver according to the present invention. First, when a broadcast burst is received through the broadcast receiver 110 of the portable broadcast receiver 100 in step S110, the portable broadcast receiver 100 receives a clock buffer through the clock storage 120. Initialize Buffer). Next, each time a broadcast section is received through the broadcast receiver 110 of the portable broadcast receiver 100 in step S120, the portable broadcast receiver 100 performs the clock storage 120. The broadcast section reception time T _d is updated in the clock buffer.

If the broadcast section received through the broadcast receiver 110 is interrupted during reception, the portable broadcast receiver 100 broadcasts the last received broadcast section stored in the clock buffer through the controller 130 in step S130. The estimated time of arrival of the next broadcast burst (T _nb ) from the sum of the section reception time (T _d ) and the delta T ('Delta-T'), which is time information indicating when the next broadcast burst included in the last received broadcast section is reached. = T _d + 'Delta-T')

Next, in step S140, the portable broadcast receiver 100 turns off the power of the broadcast receiver 110 until the next broadcast burst arrival estimated time T _nb calculated by the power controller 140 is reached by the step S130. OFF), and when the next broadcast burst arrival expected time T _nb is reached, the broadcast receiver 110 is turned on to resume broadcast burst reception.

Therefore, in the present invention, when a broadcast signal detection temporarily fails or continuously fails during broadcast reception, Delta-T (Delta-T), which is time information indicating a reception time of a broadcast section of the last received broadcast section and a arrival time of the next broadcast burst, is disclosed. Calculate the estimated time of arrival of the next broadcast burst and re-detect the broadcast signal by turning on the power of the broadcast receiver when the expected time of arrival of the next broadcast burst is reached. Since the broadcast signal is redetected only in the time interval predicted as the time interval in which the broadcast signal is transmitted without attempting detection, the broadcast signal is not transmitted in case of failure of the conventional broadcast signal reception. Unnecessary power consumption caused by continuing to attempt to detect broadcast signals until a signal is detected Thereby it can avoid.

On the other hand, according to an additional aspect of the present invention, the broadcast signal re-detection method of the portable broadcast receiver according to the present invention reaches the next broadcast burst arrival expected time (T _nb ) in step S140 of the broadcast receiver 110 When the broadcast burst reception is resumed by turning the power ON, the portable broadcast receiver 100 may be configured to compensate for an error T _j due to waveform-t jitter caused by an irregular electrical signal. .

At this time, the compensation due to the waveform hunting may be to attempt burst detection for a specific time. For example, the portable broadcast receiver 100 controls the control unit for 2 nT _j times twice the value multiplied by the number of times the broadcast burst has been missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter). In operation 130, broadcast burst detection may be attempted. Of course, 2nT _j When a broadcast burst is detected during the time, it is preferable that the controller 130 of the portable broadcast receiver 100 controls the broadcast burst to receive the broadcast burst through the broadcast receiver 110.

If 2nT _j When the broadcast burst is not detected during the time, it is preferable that the controller 130 of the portable broadcast reception device 100 turns off the power of the broadcast reception unit 110. Accordingly, in this case, when the next broadcast burst arrival expected time T _nb is reached and the power of the broadcast receiving unit 110 is turned on, the burst detection is attempted for a specific time and the broadcast burst is detected according to whether the broadcast burst is detected. By determining whether to receive or to turn off the broadcast receiving unit 110, unnecessary power consumption due to an error in the estimated time of arrival of the next broadcast burst, which may be caused by a waveform-delta jitter caused by an irregular signal, may be prevented. Will be.

In the present invention, whenever each broadcast section is received, each clock section is received, without updating the last received broadcast section reception time T _d in the clock buffer. It is also the scope of the present invention to store each broadcast section reception time T _{d in a} buffer so that each of them can be used to calculate the next broadcast burst arrival prediction time if the broadcast burst reception fails temporarily or successively. Included in In this case, one of the average value, the lowest value, and the maximum value of the sum of each broadcast section reception time (T _d ) and the delta T (Delta-T) included in the header of each broadcast section is expected to arrive at the next broadcast burst. It can be time.

As described above, the portable broadcast receiver and the broadcast signal redetection method thereof according to the present invention, when the broadcast signal detection temporarily fails or continuously fails during the broadcast reception, the broadcast section reception time of the last received broadcast section and the following; Calculate the estimated time of arrival of the next broadcast burst using Delta-T, time information indicating when the broadcast burst arrived, and re-detect the broadcast signal by turning on the power when the estimated time of arrival of the next broadcast burst is reached. As a result, the broadcast signal is failed to be redetected in the time interval in which the broadcast signal is not transmitted, and the broadcast signal redetection is attempted only in the time interval predicted as the time interval in which the broadcast signal is transmitted. Even if the time signal is not transmitted, it continues until a broadcast signal is detected. It has a useful effect of preventing unnecessary power consumption caused by attempting to detect a broadcast signal.

In addition, the portable broadcast receiver according to the present invention and its broadcast signal redetection method attempt to detect a burst for a specific time when the power of broadcast reception is turned on by reaching the next broadcast burst arrival time T _nb . Unnecessary due to an error in the expected time of arrival of the next broadcast burst which may be caused by a waveform-t jitter caused by an irregularity in electrical signals by determining whether to receive a broadcast burst or to turn off the power of the broadcast receiver according to whether a broadcast burst is detected. It has the effect of preventing power consumption.

While the invention has been described with reference to the preferred embodiments, which are referred to by the accompanying drawings, it is apparent that various modifications are possible without departing from the scope of the invention within the scope covered by the following claims from this description. .

Claims (24)

A broadcast receiver for receiving a broadcast burst; When a broadcast burst is received by the broadcast receiver, a clock buffer is initialized, and each time a broadcast section is received, a broadcast section reception time T _d is input to the clock buffer. An update clock storage unit; When controlling the entire apparatus, but the reception is interrupted during the reception of the broadcast section, the next broadcast burst arrival is predicted using the broadcast section reception time T _d of the last received broadcast section stored in the clock buffer and the received broadcast information. A control unit for calculating the time T _nb ; The power of the broadcast receiver is turned off until the next broadcast burst arrival time T _nb calculated by the controller is turned off, and when the next broadcast burst arrival time T _nb is reached, the power of the broadcast receiver is turned on. A power control section which turns ON to resume broadcast burst reception; Portable broadcast receiver comprising a. The method of claim 1, The control unit: When the reception is interrupted during the reception of the broadcast section, time information indicating a broadcast section reception time T _d of the last received broadcast section stored in the clock buffer and a time when the next broadcast burst included in the last received broadcast section is reached. Estimated time of arrival of the next broadcast burst (T _nb ) from the sum of Delta T ('Delta-T') = T _d + Portable broadcast receiver, characterized in that for calculating 'Delta-T'). The method of claim 2, The control unit: When the next broadcast burst arrival time T _nb is reached and power of the broadcast receiver is turned on by the power control unit and broadcast burst reception is resumed, waveform hunting caused by an irregular electrical signal (Delta-T Jitter) Portable broadcast receiver, characterized in that for compensating for the error (T _j ). The method of claim 3, wherein Compensation by the Delta-T Jitter is: And a broadcast burst detection is attempted for twice as long as the product of the number of missed broadcast bursts (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter). The method of claim 4, wherein The control unit: When a broadcast burst is detected for twice the time multiplied by the number of times the broadcast burst is continuously missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter), the broadcast burst through the broadcast receiver ( Portable broadcast receiving apparatus characterized in that the control to receive. The method of claim 4, wherein The control unit: When the broadcast burst is not detected for twice the time multiplied by the number n of consecutive broadcast bursts (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter), the broadcast is controlled through the power control unit. A portable broadcast receiver characterized in that the control to turn off the power of the receiver. A broadcast receiver for receiving a broadcast burst; When a broadcast burst is received by the broadcast receiving unit, a clock buffer is initialized, and each broadcast section reception time T _d is input to the clock buffer each time a broadcast section is received. A clock storage unit for storing each; When controlling the overall apparatus, but the reception is interrupted during the reception of the broadcast section, each broadcast section reception time (T _d ) stored in the clock buffer and the estimated broadcast burst arrival time (T _nb ) by using the received broadcast information. A control unit for calculating a; The power of the broadcast receiver is turned off until the next broadcast burst arrival time T _nb calculated by the controller is turned off, and when the next broadcast burst arrival time T _nb is reached, the power of the broadcast receiver is turned on. A power control section which turns ON to resume broadcast burst reception; Portable broadcast receiver comprising a. The method of claim 7, wherein The control unit: If reception is interrupted during the reception of a broadcast section, the sum of each broadcast section reception time (T _d ) and delta T ('Delta-T'), which is time information indicating the arrival time of the next broadcast burst included in each broadcast section, are added together. Estimated time of arrival of the next broadcast burst (T _nb) from either the average value, the lowest value, or the maximum of the values. = T _d + Portable broadcast receiver, characterized in that for calculating 'Delta-T'). The method of claim 8, The control unit: When the next broadcast burst arrival time T _nb is reached and power of the broadcast receiver is turned on by the power control unit and broadcast burst reception is resumed, waveform hunting caused by an irregular electrical signal (Delta-T Jitter) Portable broadcast receiver, characterized in that for compensating for the error (T _j ). The method of claim 9, Compensation by the Delta-T Jitter is: And a broadcast burst detection is attempted for twice as long as the product of the number of missed broadcast bursts (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter). The method of claim 10, The control unit: When a broadcast burst is detected for twice the time multiplied by the number of times the broadcast burst is continuously missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter), the broadcast burst through the broadcast receiver ( Portable broadcast receiving apparatus characterized in that the control to receive. The method of claim 10, The control unit: When the broadcast burst is not detected for twice the time multiplied by the number n of consecutive broadcast bursts (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter), the broadcast is controlled through the power control unit. A portable broadcast receiver characterized in that the control to turn off the power of the receiver. a1) when the broadcast burst is received, the portable broadcast receiver initializing a clock buffer; a2) each time a broadcast section is received, the portable broadcast receiver updating the broadcast section reception time T _d in the clock buffer; a3) When the reception is interrupted during the reception of the broadcast section, the portable broadcast receiver arrives at the next broadcast burst using the broadcast section reception time T _d of the last received broadcast section stored in the clock buffer and the received broadcast information. Calculating an expected time T _nb ; a4) The portable broadcast receiver turns off the power of the broadcast receiver until the next broadcast burst arrival time T _nb calculated by step a3) is reached, and at the next broadcast burst arrival time T _nb . Upon reaching, turning on the power of the broadcast receiver to resume broadcast burst reception; Broadcast signal detection method of a portable broadcast receiving device comprising a. The method of claim 13, When the reception is interrupted during the reception of the broadcast section in step a3), the broadcast section reception time T _d of the last received broadcast section stored in the clock buffer and the arrival time of the next broadcast burst included in the last received broadcast section Estimated time of arrival of the next broadcast burst (T _nb ) from the sum of delta T ('Delta-T') = T _d + 'Delta-T') is a broadcast signal re-detection method of a portable broadcast receiver. The method of claim 14, When the next broadcast burst arrival expected time T _nb is reached in step a4) and the broadcast receiver is resumed by turning on the power of the broadcast receiver, waveform hunting caused by the irregularity of the electrical signal is caused by the portable broadcast receiver. A method of redetecting a broadcast signal of a portable broadcast receiver, comprising compensating for an error T _j due to a Delta-T Jitter. The method of claim 15, Compensation by the Delta-T Jitter is: Characterized in that the portable broadcast receiver attempts to detect the broadcast burst for twice the time multiplied by the number of times the broadcast burst is continuously missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter). A broadcast signal redetection method of a portable broadcast receiver. The method of claim 16, When a broadcast burst is detected for twice the time multiplied by the number n of consecutively missed broadcast bursts n and the error T _j due to waveform hunting (Delta-T Jitter), the portable broadcast receiver receives the broadcast receiver. Receiving a broadcast burst (Burst) through the broadcast signal re-detection method of a portable broadcast receiver. The method of claim 16, If the broadcast burst is not detected for twice the time multiplied by the number of times the broadcast burst is continuously missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter), the portable broadcast receiver receives the broadcast. A broadcast signal redetection method of a portable broadcast receiver, characterized in that the power of the receiver is turned off. b1) when the broadcast burst is received, the portable broadcast receiver initializing a clock buffer; b2) each time a broadcast section is received, the portable broadcast receiver stores each broadcast section reception time T _d in the clock buffer, respectively; b3) When the reception is interrupted during the reception of the broadcast section, the portable broadcast receiver receives each broadcast section reception time T _d stored in the clock buffer and the estimated broadcast burst arrival time T _nb using the received broadcast information. Calculating c); b4) The portable broadcast receiver turns off the power of the broadcast receiver until the next broadcast burst arrival time T _nb calculated by step a3) and reaches the next broadcast burst arrival time T _nb . Upon reaching, turning on the power of the broadcast receiver to resume broadcast burst reception; Broadcast signal detection method of a portable broadcast receiving device comprising a. The method of claim 19, In step b3) When the reception is interrupted during the reception of the broadcast section, the delta T ('time information indicating the arrival time of the broadcast section T _d of each broadcast section stored in the clock buffer and the arrival time of the next broadcast burst included in each broadcast section) Estimated time of arrival of the next broadcast burst (T _nb ) from the sum of Delta-T ') = T _d + 'Delta-T') is a broadcast signal re-detection method of a portable broadcast receiver. The method of claim 20, When the next broadcast burst arrival expected time T _nb is reached in step b4), when the broadcast burst reception is resumed by turning on the power of the broadcast receiver, the portable broadcast receiver generates waveforms caused by irregular electrical signals. A method of redetecting a broadcast signal of a portable broadcast receiver, comprising compensating for an error T _j due to a Delta-T Jitter. The method of claim 21, Compensation by the Delta-T Jitter is: Characterized in that the portable broadcast receiver attempts to detect the broadcast burst for twice the time multiplied by the number of times the broadcast burst is continuously missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter). A broadcast signal redetection method of a portable broadcast receiver. The method of claim 22, When a broadcast burst is detected for twice the time multiplied by the number n of consecutively missed broadcast bursts n and the error T _j due to waveform hunting (Delta-T Jitter), the portable broadcast receiver receives the broadcast receiver. Receiving a broadcast burst (Burst) through the broadcast signal re-detection method of a portable broadcast receiver. The method of claim 22, If the broadcast burst is not detected for twice the time multiplied by the number of times the broadcast burst is continuously missed (n) and the error (T _j ) due to waveform hunting (Delta-T Jitter), the portable broadcast receiver receives the broadcast. A broadcast signal redetection method of a portable broadcast receiver, characterized in that the power of the receiver is turned off.

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