KR101296140B1 - System and method for receiving mobile digital broadcasting - Google Patents

Abstract

The mobile digital broadcast reception system according to an embodiment of the present invention measures and compares the reception sensitivity level of the ATSC tuner and the reception sensitivity level of the TDMB tuner, and selects one of the buffers according to the comparison result to select an ATSC signal or a TDMB signal. To the audio and video decoder. Therefore, the present invention can compensate for the problem of high quality ATSC broadcasting, which is vulnerable to mobile reception, and thus can reproduce the video seamlessly even when moving.

Description

Mobile digital broadcasting reception system and method {SYSTEM AND METHOD FOR RECEIVING MOBILE DIGITAL BROADCASTING}

Embodiments of the present invention relate to a mobile digital broadcast receiving system and method.

The mobile digital broadcast receiving system applies a broadcast receiving function to a mobile terminal such as a mobile phone, a PDA, a navigation terminal, and the like, and provides various multimedia broadcasts on the move as well as a fixed place.

The mobile digital broadcasting reception system provides multimedia broadcasting through terrestrial digital broadcasting (ATSC) and terrestrial digital multimedia broadcasting (TDMB).

However, in the case of the ATSC system, it is possible to watch high-definition video in a fixed place, while the received signal is weak while moving, so it is difficult to watch the broadcast. In addition, although the TDMB method is suitable for mobile reception, only low quality broadcasts can be viewed.

Therefore, there is a need to develop a mobile digital broadcast receiving system and method that can seamlessly reproduce high-definition images on the go.

According to an embodiment of the present invention, by selecting and outputting one of ATSC broadcast and TDMB broadcast in consideration of reception sensitivity and buffer storage amount of ATSC and TDMB broadcast, it is possible to compensate for the problem of high quality ATSC broadcast, which is vulnerable to mobile reception. Accordingly, the present invention provides a mobile digital broadcast receiving system and method that can seamlessly reproduce an image even when moving.

According to an embodiment of the present invention, a mobile digital broadcast receiving system includes a first buffer for storing first AV (audio and video) data received from an ATSC tuner; A second buffer for storing second AV data received from the TDMB tuner; A reception state detector for measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner; And a selection unit for comparing the first and second reception sensitivity levels, selecting one of the first and second buffers according to a comparison result, and outputting AV data stored in the selected one buffer.

The selector may select the first buffer when the first reception sensitivity level is greater than the second reception sensitivity level, and select the second buffer when the first reception sensitivity level is smaller than the second reception sensitivity level. have.

When the first and second reception sensitivity levels are equal to each other or the difference between the first and second reception sensitivity levels is within a range of a preset value, the selector is configured to determine the first AV data stored in the first buffer. The storage amount may be compared with the storage amount of the second AV data stored in the second buffer, and the one buffer may be selected from the first buffer and the second buffer according to a comparison result.

The selector selects the first buffer when the storage amount of the first buffer is greater than or equal to the storage amount of the second buffer, and selects the second buffer when the storage amount of the first buffer is less than the storage amount of the second buffer. You can choose.

The mobile digital broadcasting reception system according to an embodiment of the present invention generates an integrated service list using a service list received from each of the ATSC tuner and the TDMB tuner, and when the broadcast channel is selected according to a user's operation, A service information controller for transmitting a frequency of a service list corresponding to a broadcast channel to the ATSC tuner and the TDMB tuner; And a tuner controller configured to tune and control the ATSC tuner and the TDMB tuner using the frequency transmitted from the service information controller.

The first buffer may store a timestamp value of an ATSC broadcast signal from the ATSC tuner when the first AV data is stored, and adjust the storage amount of the first AV data by using a difference in the timestamp value.

The second buffer may store a timestamp value of a TDMB broadcast signal from the TDMB tuner when the second AV data is stored, and adjust the storage amount of the second AV data by using a difference of the timestamp values.

According to another aspect of the present invention, there is provided a mobile digital broadcast receiving system comprising: a first buffer for storing first AV data received from an ATSC tuner; A second buffer for storing second AV data received from the TDMB tuner; A reception state detector for measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner; And a selection unit for comparing the first and second reception sensitivity levels with a preset threshold, selecting one of the first and second buffers according to the comparison result, and outputting AV data stored in the selected one buffer. Include.

The selector selects the first buffer when the first reception sensitivity level is greater than or equal to the threshold value, and selects the first buffer when the first reception sensitivity level is less than the threshold value; You can select a buffer.

According to an embodiment of the present invention, there is provided a method for receiving a mobile digital broadcast, comprising: storing first AV data received from an ATSC tuner in a first buffer; Storing second AV data received from the TDMB tuner in a second buffer; Measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner; Comparing the first and second reception sensitivity levels; And selecting one of the first and second buffers according to the comparison result, and outputting AV data stored in the selected one buffer.

Selecting one of the first and second buffers includes selecting the first buffer if the first reception sensitivity level is greater than the second reception sensitivity level; And selecting the second buffer when the first reception sensitivity level is smaller than the second reception sensitivity level.

When the first and second reception sensitivity levels are equal to each other or the difference between the first and second reception sensitivity levels is within a range of a preset value, selecting one of the first and second buffers may be performed. Comparing the storage amount of the first AV data stored in a first buffer with the storage amount of the second AV data stored in the second buffer; And selecting the one buffer from the first buffer and the second buffer according to the comparison result.

Selecting one of the first and second buffers includes selecting the first buffer if the storage amount of the first buffer is greater than or equal to the storage amount of the second buffer; And selecting the second buffer when the storage amount of the first buffer is less than the storage amount of the second buffer.

According to an aspect of the present invention, there is provided a method for receiving a mobile digital broadcast, comprising: generating an integrated service list using a service list received from each of the ATSC tuner and the TDMB tuner; Transmitting a frequency of a service list corresponding to the selected broadcast channel to the ATSC tuner and the TDMB tuner when a broadcast channel is selected according to a user's manipulation; And tuning tuning the ATSC tuner and the TDMB tuner at the frequency.

According to an aspect of the present invention, there is provided a method for receiving mobile digital broadcast, storing the timestamp value of an ATSC broadcast signal from the ATSC tuner in the first buffer when storing the first AV data; And adjusting the storage amount of the first AV data by using the difference of the time stamp values.

According to an aspect of the present invention, there is provided a method for receiving mobile digital broadcasting, storing the timestamp value of a TDMB broadcast signal from the TDMB tuner in the second buffer when storing the second AV data; And adjusting the storage amount of the second AV data by using the difference of the time stamp values.

According to another aspect of the present invention, there is provided a method for receiving a mobile digital broadcast, comprising: storing first AV data received from an ATSC tuner in a first buffer; Storing second AV data received from the TDMB tuner in a second buffer; Measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner; Comparing the first and second reception sensitivity levels with a preset threshold; And selecting one of the first and second buffers according to the comparison result, and outputting AV data stored in the selected one buffer.

Selecting one of the first and second buffers includes selecting the first buffer when the first reception sensitivity level is greater than or equal to the threshold; And selecting the second buffer when the second reception sensitivity level is greater than or equal to the threshold value when the first reception sensitivity level is less than the threshold value.

According to an embodiment of the present invention, by selecting one of the ATSC broadcast or TDMB broadcast in consideration of the reception sensitivity, buffer storage amount, etc. of the ATSC and TDMB broadcast, it is possible to supplement the problem of high-quality ATSC broadcast vulnerable to mobile reception Through this, the video can be played back seamlessly even when moving.

1 is a block diagram illustrating a mobile digital broadcast reception system according to an embodiment of the present invention.
2 is a flowchart illustrating a mobile digital broadcast reception method according to an embodiment of the present invention.
3 and 4 are flowcharts illustrating a mobile digital broadcast reception method according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and / or features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Existing digital broadcasting systems can play high-definition video in fixed reception, but are vulnerable to mobile reception and cannot reproduce broadcasts between vehicles such as vehicles. In contrast, DMB is suitable for mobile reception, but can reproduce only low-quality broadcasts.

Accordingly, in an embodiment of the present invention, by selecting and outputting one of ATSC broadcast or TDMB broadcast in consideration of the reception sensitivity of the ATSC and TDMB broadcast, the buffer storage amount, and the like, the mobile digital broadcast reception capable of seamlessly playing the video even when moving Provides a system and method.

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

1 is a block diagram illustrating a mobile digital broadcast reception system according to an embodiment of the present invention.

Referring to FIG. 1, a mobile digital broadcast reception system 100 according to an embodiment of the present invention includes a TDMB tuner 101, an ATSC tuner 102, a tuner controller 103, a service information controller 104, and an FIC parser. 105, DAB parser 106, MPEG2 parser 107, MPEG4 parser 108, first buffer 109, second buffer 110, reception state detector 111, selector 112, The audio decoder 113, the audio output unit 114, the video decoder 115, and the video output unit 116 may be included.

The TDMB tuner 101 tunes one channel among a plurality of channels and outputs one broadcast signal among a plurality of TDMB broadcast signals received by the antenna.

The ATSC tuner 102 tunes one of a plurality of channels and outputs one broadcast signal of a plurality of ATSC broadcast signals received by the antenna.

The tuner control unit 103 transmits a tuning command to the TDMB tuner 101 and the ATSC tuner 102.

The service information control unit 104 generates an integrated service list using the service list received from each of the TDMB tuner 101 and the ATSC tuner 102.

Here, the service list is a list related to TDMB broadcasting and ATSC broadcasting, and may include, for example, MBC, KBS1, KBS2, EBS, and SBS. In addition, the integrated service list may include information on the same broadcast and other broadcasts among TDMB broadcast and ATSC broadcast.

For example, the TDMB service list includes MBC, KBS Star (KBS1), KBS Heart (KBS2), SBS, UTV, YTV, etc., and the ATSC service list includes MBC, KBS1, KBS2, EBS, SBS, etc. Assume that In this case, the service information control unit 104 may generate an integrated service list including MBC, KBS1, KBS2, EBS, SBS, UTV, YTV, etc. by integrating the TDMB service list and the ATSC service list.

When the user selects a broadcast channel by operating a remote controller or the like, the service information controller 104 transmits a frequency of a service list corresponding to the selected broadcast channel to the tuner controller 103. The tuner controller 103 transmits the frequency of the service list to the TDMB tuner 101 and the ATSC tuner 102.

The FIC parser 105 parses the fast information channel (FIC) included in the TDMB broadcast signal output from the TDMB tuner 101 and extracts the TDMB service list from the TDMB broadcast signal. The FIC parser 105 transmits the extracted TDMB service list to the service information controller 104.

The DAB parser 106 receives the TDMB broadcast signal from the TDMB tuner 101 and extracts TS data.

The MPEG2 parser 107 receives an ATSC broadcast signal from the ATSC tuner 102, extracts a service list of an ATSC broadcast, and delivers the service list to the service information controller 104. Also, the MPEG2 parser 107 receives an ATSC broadcast signal from the ATSC tuner 102, extracts AV data (audio / video data), and delivers the AV data to the first buffer 109. In addition, the MPEG2 parser 107 receives TS data from the DAB parser 106 and extracts MPEG4 data.

The MPEG4 parser 108 extracts AV data from the TS data of the TDMB broadcast signal received from the DAB parser 106 via the MPEG2 parser 107 and delivers the AV data to the second buffer 110.

The first buffer 109 stores first AV data included in an ATSC broadcast signal received from the ATSC tuner 102. That is, the first buffer 109 stores the first AV data extracted by the MPEG2 parser 107.

The first buffer 109 may store a timestamp value of the ATSC broadcast signal when the first AV data is stored, and adjust a storage capacity by using a difference of the timestamp values.

In this case, the first buffer 109 uses the difference between the timestamp value when the first AV data is first stored and the timestamp value when the first AV data is last stored. The storage capacity of 109 can be adjusted.

That is, the first buffer 109 adjusts the storage capacity of the first buffer 109 by deleting the first AV data corresponding to the difference in the time stamp value when the difference in the time stamp value is more than a predetermined value. Can be.

In this case, the first buffer 109 may adjust the amount of the buffer when AV data (second AV data) is output from the second buffer 110. That is, the first buffer 109 adjusts the amount of buffer by storing only the data for a predetermined time by using the time stamp value, and the second buffer 110 outputs the second AV data. For example, the buffer can be automatically adjusted by the amount of data exhausted for output.

The second buffer 110 stores second AV data included in the TDMB broadcast signal received from the TDMB tuner 101. That is, the second buffer 110 stores the second AV data extracted by the MPEG4 parser 108.

The second buffer 110 may store the timestamp value of the TDMB broadcast signal from the TDMB tuner 101 when the second AV data is stored, and adjust the storage capacity by using the difference in the timestamp value. .

In this case, the second buffer 110 may be configured by using the difference between the timestamp value when the second AV data is first stored and the timestamp value when the second AV data is last stored. 110, the storage capacity can be adjusted.

That is, when the difference between the timestamps is greater than or equal to a predetermined value, the second buffer 110 controls the storage capacity of the second buffer 110 by deleting the second AV data corresponding to the differences of the timestamps. Can be.

In this case, the second buffer 110 may adjust the amount of the buffer when the first AV data is output from the first buffer 109. That is, the second buffer 110 adjusts the amount of buffer by storing only the data for a predetermined time by using the time stamp value, and the first buffer 109 outputs the first AV data. For example, the buffer can be automatically adjusted by the amount of data exhausted for output.

The reception state detector 111 measures a first reception sensitivity level of the ATSC tuner 102 and a second reception sensitivity level of the TDMB tuner 101. To this end, the reception state detecting unit 111 obtains information such as a signal to noise ratio (SNR), a bit error rate (BER), etc. from each of the ATSC tuner 102 and the TDMB tuner 101. 102 and whether the reception state of the TDMB tuner 101 is good can be checked.

The reception state detector 111 may check a buffering amount from each of the first and second buffers 109 and 110.

That is, the reception state detector 111 may transmit a result of checking the reception state of each tuner and the buffering amount of each buffer to the selection unit 112. The selector 112 may determine the AV data to be output from the first and second buffers 109 and 110 based on the check result.

When the reception state of the ATSC broadcast signal and the TDMB broadcast signal is similar, the reception state detector 111 may select first AV data (ATSC broadcast data) stored in the first buffer 109 as a basic output.

The selector 112 compares the first and second reception sensitivity levels measured by the reception state detector 111. The selector 112 selects one of the first and second buffers 109 and 110 according to the comparison result, and selects the AV data stored in the selected one buffer by using the audio decoder 113 and the video decoder ( 114).

In this case, the selector 112 outputs audio data of the AV data to the audio decoder 113 and video data of the AV data to the video decoder 114.

As an example, when the first reception sensitivity level is greater than the second reception sensitivity level, the selection unit 112 switches the first buffer 109 as a result of the measurement by the reception state detection unit 111. The first AV data stored in the first buffer 109 may be output.

As another example, when the first reception sensitivity level is less than the second reception sensitivity level, the selector 112 switches the second buffer 110 when measured by the reception state detector 111. The second AV data stored in the second buffer 110 may be output.

As another example, when the measurement result of the reception state detector 111 indicates that the first reception sensitivity level and the second reception sensitivity level are the same, the selector 112 may be configured to include the first and second buffers 109,. One buffer may be selected based on the data storage amount of 110.

To this end, the selector 112 may compare data storage amounts of the first and second buffers 109 and 110.

As a result of the comparison, when the amount of data stored in the first buffer 109 is larger than the amount of data stored in the second buffer 110, the selector 112 selects the first buffer 109 to select the first buffer. The first AV data stored in 109 may be output.

On the other hand, if the data storage amount of the first buffer 109 is less than the data storage amount of the second buffer 110, the selector 112 selects the second buffer 110 to generate the first buffer. The second AV data stored in the second buffer 110 may be output.

The selector 112 may output the AV data stored in the selected buffer to the audio decoder 113 and the video decoder 114. That is, the selector 112 outputs the first AV data stored in the first buffer 109 when the first buffer 109 is selected, and the second buffer when the second buffer 110 is selected. The second AV data stored at 110 may be output.

In this case, the selector 112 outputs audio data of the AV data to the audio decoder 113 and video data of the AV data to the video decoder 114.

The audio decoder 113 receives audio data from one of the first buffer 109 or the second buffer 110 according to a selection operation of the selector 112. The audio decoder 113 decodes the input audio data and outputs the decoded audio data.

The audio output unit 114 outputs audio data output from the audio decoder 113.

The video decoder 115 receives video data from one of the first buffer 109 or the second buffer 110 according to a selection operation of the selector 112. The video decoder 113 decodes and outputs the input video data.

The video output unit 116 outputs video data output from the video decoder 115.

2 is a flowchart illustrating a mobile digital broadcast reception method according to an embodiment of the present invention. Here, the mobile digital broadcast reception method may be performed by the mobile digital broadcast reception system 100 of FIG. 1.

Referring to FIG. 2, in step 210, the mobile digital broadcast receiving system receives an ATSC broadcast signal and a TDMB broadcast signal through an ATSC tuner and a TDMB tuner.

Next, in step 220, the mobile digital broadcast receiving system separates video and audio signals (data) from the ATSC broadcast signal and the TDMB broadcast signal.

Next, in step 230, the mobile digital broadcast reception system stores AV data (audio and video data) in a buffer. In this case, the mobile digital broadcasting reception system stores first AV data received from the ATSC tuner in a first buffer, and stores second AV data received from the TDMB tuner in a second buffer.

Next, in step 240, the mobile digital broadcast reception system determines that the reception state of ATSC is a specific threshold value TH. It is determined whether or not it is abnormal. To this end, the mobile digital broadcast reception system may measure a reception sensitivity level (first reception sensitivity level) of the ATSC tuner. Here, the threshold value TH is a value determined based on the bit error rate BER, and may be determined as a value corresponding to a bit error rate in the range of 0 to 0.002.

As a result of the determination, if the reception state of the ATSC is greater than or equal to a certain threshold (YES direction 240), the mobile digital broadcasting reception system switches and outputs AV data of the ATSC in step 250. That is, the mobile digital broadcast reception system outputs the AV data (first AV data) by switching the first buffer.

On the other hand, if the reception result of the ATSC is less than a certain threshold ("No" direction 240), the mobile digital broadcast reception system determines whether the reception status of the TDMB is above a certain threshold in step 260. To judge. To this end, the mobile digital broadcast reception system may measure a reception sensitivity level (second reception sensitivity level) of the TDMB tuner.

As a result of the determination, when the reception state of the TDMB is greater than or equal to a certain threshold (YES direction 260), in step 270, the mobile digital broadcasting reception system switches and outputs AV data of the TDMB. That is, the mobile digital broadcast reception system outputs the AV data (second AV data) by switching the second buffer.

On the other hand, if the reception result of the TDMB is less than a certain threshold (No direction 260), the mobile digital broadcast reception system performs the step 240.

Next, in step 280, the mobile digital broadcast receiving system decodes one of the first and second AV data through the audio and video decoder.

Next, in step 290, the mobile digital broadcast reception system outputs the decoded AV data (first or second AV data) through an audio and video output unit.

Meanwhile, in the present embodiment, when the storage amount of the first buffer during the ATSC broadcast signal reception is less than the specific threshold TH1 or the reception state is less than the specific threshold TH2 for more than a specific time TH3, The mobile digital broadcast reception system may select the second buffer and switch to TDMB. In addition, when the storage amount of the second buffer during the reception of the TDMB broadcast signal is less than the specific threshold value TH1 or the reception state is less than the specific threshold value TH2, the mobile digital broadcast reception is performed. The system may select the first buffer and switch to ATSC.

3 and 4 are flowcharts illustrating a mobile digital broadcast reception method according to another embodiment of the present invention.

First, referring to FIG. 3, in step 310, the mobile digital broadcast reception system receives and stores ATSC and TDMB broadcast signals.

At this time, if the reception sensitivity level (first reception sensitivity level) of the ATSC broadcast signal is greater than the reception sensitivity level (second reception sensitivity level) of the TDMB broadcast signal (YES direction 320), the mobile in step 330 The digital broadcast reception system selects a first buffer and outputs ATSC broadcast data (first AV data) stored in the first buffer.

Next, in step 340, the mobile digital broadcast reception system decodes the first AV data.

Next, in step 350, the mobile digital broadcast reception system outputs the decoded first AV data through an audio and video output unit.

On the other hand, if the first reception sensitivity level is not greater than the second reception sensitivity level (No direction of 320), the mobile digital broadcast reception system determines the first and second reception sensitivity levels in step 360. We will compare again.

If the first reception sensitivity level is less than the second reception sensitivity level (YES direction 360), the mobile digital broadcast reception system selects a second buffer and stores the TDMB stored in the second buffer in step 370. The broadcast data (second AV data) is output.

Next, in step 340, the mobile digital broadcast reception system decodes the second AV data.

Next, in step 350, the mobile digital broadcast reception system outputs the decoded second AV data through an audio and video output unit.

On the other hand, if the first reception sensitivity level is not less than the second reception sensitivity level (No direction of 360), the mobile digital broadcast reception system performs step (A).

That is, if the first reception sensitivity level and the second reception sensitivity level are the same or the difference is within a preset error range, as shown in FIG. Compare the amount of data storage in the first buffer and the second buffer.

As a result of the comparison, if the storage amount of the first buffer is greater than or equal to the storage amount of the second buffer (YES direction 410), in step 420, the mobile digital broadcasting reception system selects the first buffer and selects the first buffer. The first AV data stored in the first buffer is output.

Next, in step 430, the mobile digital broadcast reception system decodes the first AV data.

Next, in step 440, the mobile digital broadcast reception system outputs the decoded first AV data through an audio and video output unit.

On the other hand, when the comparison result indicates that the storage amount of the second buffer is smaller than the storage amount of the first buffer (No in 410), the mobile digital broadcasting reception system selects the second buffer and selects the second buffer. Output the stored second AV data.

Next, in step 430, the mobile digital broadcast reception system decodes the second AV data.

Next, in step 440, the mobile digital broadcasting reception system outputs the decoded second AV data through an audio and video output unit.

As described above, in the embodiments of the present invention, one of ATSC broadcast and TDMB broadcast is selected and output in consideration of the reception sensitivity of the ATSC and TDMB broadcast, the buffer storage amount, and the like, so that the video can be reproduced without any movement. Accordingly, the user can continuously watch the broadcast without interruption even when moving through the vehicle.

Embodiments of the present invention include computer readable media including program instructions for performing various computer implemented operations. The computer-readable medium may include program instructions, local data files, local data structures, etc., alone or in combination. The media may be those specially designed and constructed for the present invention or may be those known to those skilled in the computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floppy disks, and ROMs, And hardware devices specifically configured to store and execute the same program instructions. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

100: mobile digital broadcast receiving system 101: TDMB tuner
102: ATSC tuner 103: tuner control unit
104: service information control unit 105: FIC parser
106: DAB parser 107: MPEG2 parser
108: MPEG4 parser 109: first buffer
110: second buffer 111: reception state detection unit
112: selection unit 113: audio decoder
114: audio output unit 115: video decoder
116: video output

Claims (18)

A first buffer for storing first AV (audio and video) data received from an ATSC tuner;
A second buffer for storing second AV data received from the TDMB tuner;
A reception state detector for measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner; And
A selector configured to compare the first and second reception sensitivity levels, select one of the first and second buffers according to a comparison result, and output AV data stored in the selected one buffer;
When the first and second reception sensitivity levels are the same or when the difference between the first and second reception sensitivity levels is within a range of a preset value,
The selector compares a storage amount of the first AV data stored in the first buffer with a storage amount of the second AV data stored in the second buffer, and selects one of the first buffer and the second buffer according to a comparison result. And a buffer of the mobile digital broadcast reception system. The method of claim 1,
The selection unit
Select the first buffer when the first reception sensitivity level is greater than the second reception sensitivity level, and select the second buffer when the first reception sensitivity level is less than the second reception sensitivity level. Mobile digital broadcast receiving system. delete The method of claim 1,
The selection unit
Selecting the first buffer when the storage amount of the first buffer is greater than or equal to the storage amount of the second buffer; and selecting the second buffer when the storage amount of the first buffer is less than the storage amount of the second buffer. Characterized in a mobile digital broadcast receiving system. The method of claim 1,
The integrated service list is generated by using the service list received from each of the ATSC tuner and the TDMB tuner. When a broadcast channel is selected according to a user's manipulation, the ATSC tuner and the frequency of the service list corresponding to the selected broadcast channel are selected. A service information controller for transmitting to the TDMB tuner; And
And a tuner control unit for tuning and controlling the ATSC tuner and the TDMB tuner at the frequency transmitted from the service information control unit. The method of claim 1,
The first buffer is
When storing the first AV data, mobile digital broadcasting characterized in that to store the time stamp value of the ATSC broadcast signal from the ATSC tuner, and to adjust the amount of storage of the first AV data by using the difference of the time stamp value. Receiving system. The method of claim 1,
The second buffer
And storing the timestamp value of the TDMB broadcast signal from the TDMB tuner when the second AV data is stored, and adjusting the storage amount of the second AV data by using the difference in the timestamp value. Receiving system. A first buffer for storing first AV data received from an ATSC tuner;
A second buffer for storing second AV data received from the TDMB tuner;
A reception state detector for measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner; And
A selector configured to compare the first and second reception sensitivity levels with a preset threshold, select one of the first and second buffers according to the comparison result, and output AV data stored in the selected one buffer; Mobile digital broadcast receiving system, characterized in that. 9. The method of claim 8,
The selection unit
The first buffer is selected when the first reception sensitivity level is greater than or equal to the threshold, and the second buffer is selected when the second reception sensitivity level is greater than or equal to the threshold when the first reception sensitivity level is less than the threshold. Mobile digital broadcast receiving system, characterized in that. Storing the first AV data received from the ATSC tuner in a first buffer;
Storing second AV data received from the TDMB tuner in a second buffer;
Measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner;
Comparing the first and second reception sensitivity levels; And
Selecting one of the first and second buffers according to the comparison result, and outputting AV data stored in the selected one buffer,
When the first and second reception sensitivity levels are the same or when the difference between the first and second reception sensitivity levels is within a range of a preset value,
Selecting one of the first and second buffers
Comparing the storage amount of the first AV data stored in the first buffer with the storage amount of the second AV data stored in the second buffer; And
And selecting the one buffer from among the first buffer and the second buffer according to the comparison result. The method of claim 10,
Selecting one of the first and second buffers
Selecting the first buffer when the first reception sensitivity level is greater than the second reception sensitivity level; And
And selecting the second buffer when the first reception sensitivity level is smaller than the second reception sensitivity level. delete The method of claim 10,
Selecting one of the first and second buffers
Selecting the first buffer if the storage amount of the first buffer is greater than or equal to the storage amount of the second buffer; And
And selecting the second buffer when the storage amount of the first buffer is less than the storage amount of the second buffer. The method of claim 10,
Generating an integrated service list using a service list received from each of the ATSC tuner and the TDMB tuner;
Transmitting a frequency of a service list corresponding to the selected broadcast channel to the ATSC tuner and the TDMB tuner when a broadcast channel is selected according to a user's manipulation; And
And tuning tuning the ATSC tuner and the TDMB tuner to the frequency. The method of claim 10,
Storing a timestamp value of an ATSC broadcast signal from the ATSC tuner in the first buffer when storing the first AV data; And
And adjusting the storage amount of the first AV data by using the difference of the time stamp values. The method of claim 10,
Storing a timestamp value of a TDMB broadcast signal from the TDMB tuner in the second buffer when storing the second AV data; And
And adjusting the storage amount of the second AV data by using the difference of the time stamp values. Storing the first AV data received from the ATSC tuner in a first buffer;
Storing second AV data received from the TDMB tuner in a second buffer;
Measuring a first reception sensitivity level of the ATSC tuner and a second reception sensitivity level of the TDMB tuner;
Comparing the first and second reception sensitivity levels with a preset threshold value TH2;
Selecting one of the first and second buffers according to the comparison result and outputting AV data stored in the selected one buffer;
Selecting the second buffer when the storage amount of the first buffer is less than a preset threshold value TH1 during ATSC broadcast signal reception; And
And selecting the first buffer when the storage amount of the second buffer is less than the threshold value TH1 during the reception of a TDMB broadcast signal. 18. The method of claim 17,
Selecting one of the first and second buffers
Selecting the first buffer when the first reception sensitivity level is above the threshold; And
And selecting the second buffer when the second reception sensitivity level is greater than or equal to the threshold value when the first reception sensitivity level is less than the threshold value.

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