KR100750739B1 - Apparatus for receiving digital broadcasting and sub-channel allocation method thereof - Google Patents

Abstract

Disclosed are a digital broadcast receiver and a subchannel allocation method capable of receiving all broadcast signals when different broadcast signals are received on the same channel. The channel information detection unit detects channel information including major / minor numbers from the received broadcast signal. The storage unit stores at least one channel information. The control unit changes the minor number of the detected channel information when the major / minor number of the detected channel information and the stored channel information are the same, and stores the minor number of the detected channel information. Accordingly, when two or more broadcast signals having the same major / minor number exist in one channel, the broadcast information may be classified by comparing the channel information to provide more various broadcasts to the viewer.

Digital broadcasting, major / minor number, program identification number, subchannel assignment, broadcast signal

Description

Apparatus for receiving digital broadcasting and sub-channel allocation method

1 is a block diagram of a digital broadcasting receiver according to the present invention;

2 is a diagram illustrating a region in which two or more broadcasts are received in one channel according to the present invention;

3 is a flowchart illustrating an embodiment of a subchannel allocation method according to the present invention.

Explanation of symbols on the main parts of the drawings

100: channel information detector 110: controller

120: storage unit

The present invention relates to a digital broadcasting receiver such as a digital television (DTV) or a digital terrestrial television (DTTV), and a sub-channel allocation method using the same. The present invention relates to a digital broadcasting receiver and a subchannel allocation method for automatically providing various broadcasts to a user.                         

Recently, due to the development of the digital industry, standardization of digital broadcasting is being prepared in the TV broadcasting field. In the digital method, a sender compresses and encodes a picture or a voice, and then multiplexes the picture or voice and transmits the same in a data stream. The receiving side corrects an error occurring in the received data stream, separates and decompresses the video and the audio, and outputs the video and the audio.

One of the features of digital broadcasting and digital TV is multichannelization. In the analog broadcasting system, only one program could be transmitted in one bandwidth. Digital broadcasting, however, can export as many as four programs on the same bandwidth. Digital broadcasting can guarantee this many channels because it adopts MPEG-2 technology that compresses and restores video and audio with high density. Therefore, according to the digital broadcasting, it is possible to obtain a sound effect of a movie theater level even in a normal home.

With the multi-channel digital broadcasting, users can select broadcast signals with various and clear picture quality. In general, in order to select a channel desired by a user, a channel is selected using a remote controller or a channel selecting means attached to the main body. Recently, however, an automatic channel search (ACS) function, which is a function of automatically setting a channel even when a user does not select a desired broadcast channel, is provided. ACS refers to an automatic channel search function for skipping a channel in which a broadcast signal is not received or a channel having a weak signal, and automatically setting only channels in which a broadcast signal is received.

According to domestic digital TV broadcasting regulations, each broadcasting station transmits broadcasts with different physical transport channels (PTCs). For example, PTC is 15 in Seoul MBC and PTC in 20 in Cheongju MBC. Broadcasts transmitted from each broadcasting station have major-minor numbers other than PTC. However, although the PTC of the central broadcaster and the local broadcaster is different, the major-minor number is used identically. Current broadcast receivers classify broadcast signals by major-minor numbers rather than PTC.

In the case of domestic digital broadcasting, local broadcasting companies do not have the conditions to produce digital contents by themselves, so they retransmit the broadcasting signals of central broadcasting companies. In this case, since the broadcasts transmitted from each broadcaster are the same broadcasts, it is not a problem even if only one broadcast is received in the redundant reception area. However, when a local broadcasting company transmits its own broadcast, the central and local broadcasting signals of the same broadcasting station are received on the same channel. When broadcasts of different contents are received in one channel, the same broadcast is judged to show a signal of a recently received broadcast of two broadcasts. That is, the central broadcasting of the corresponding broadcast is received on one channel, and then the local broadcasting may be received, which may confuse the viewer. Alternatively, there is a problem of outputting the most recently received broadcast regardless of the user's selection.

In particular, a receiving apparatus located at an intermediate point between a central broadcasting station and a local broadcasting station, or a receiving apparatus positioned at a position capable of receiving broadcast signals from various broadcasting stations, receives a broadcast of different contents through the same channel. As described above, in the case of digital broadcasting which is highly likely to be received on the same channel for broadcasts transmitted from a broadcaster's central broadcasting station and a local broadcasting station, it is important to store various channels of the received broadcast signal differently to provide various broadcasts to the user. .

An object of the present invention is to provide a digital broadcast receiver and a subchannel allocation method capable of accommodating all received broadcast signals when different broadcast signals are received on the same channel.

According to an aspect of the present invention, there is provided a digital broadcast receiving apparatus comprising: a channel information detection unit for detecting channel information including a major / minor number from a received broadcast signal; A storage unit storing at least one channel information; And a control unit for changing the minor number of the detected channel information and storing the stored minor in the storage unit when the detected major / minor number of the channel information is the same as the stored major / minor number of the channel information.

The channel information may further include a physical transport channel through which the broadcast signal is received. The control unit controls to change the minor number of the detected channel information when the physical transport channel of the detected channel information is different from the physical transport channel of the stored channel information and store the changed minor number in the storage unit.

Preferably, the channel information further includes program identification information detected from the broadcast signal. In this case, the control unit controls to change the minor number of the detected channel information when the program identification information of the detected channel information and the stored program identification information of the stored channel information are different and store the stored information in the storage unit. .

According to another aspect of the present invention, there is provided a method for allocating a subchannel of a digital broadcasting receiver, the method comprising: detecting channel information including a major / minor number from a received broadcast signal; And changing and storing the minor number of the detected channel information when the major / minor number of the detected channel information is the same as the stored major / minor number of the channel information.

The channel information may further include a physical transport channel through which the broadcast signal is received. In this case, the storing step changes and stores the minor number of the detected channel information when the physical transport channel of the detected channel information is different from the physical transport channel of the channel information stored therein.

The channel information may further include program identification information detected from the broadcast signal. The storing step changes and stores the minor number of the detected channel information when the program identification information of the detected channel information is different from the program identification information of the stored channel information.

Therefore, when two or more different broadcasting signals having the same channel information with the same major / minor number are received in one channel, the physical transmission channel and the program identification information corresponding to the respective signals are compared and judged as different broadcasting recently. By changing and storing the minor number of the received channel information, more various broadcasts can be provided to the user.                     

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

1 is a block diagram of a digital broadcasting receiver according to the present invention.

Referring to FIG. 1, the digital broadcast receiver includes a channel information detector 100, a controller 110, and a storage 120. The channel information detector 100 detects channel information including major / minor numbers from the received broadcast signal. The storage unit 120 stores at least one channel information. The controller 110 changes the minor number of the detected channel information when the major / minor number of the channel information detected by the channel information detector 100 and the major / minor number of the channel information stored in the storage unit 120 are the same. The storage unit 120 stores.

The controller 110 checks the physical transmission channel of the channel information detector 100 when the major / minor number of the detected channel information is the same as the major / minor number of the stored channel information. In this case, when the physical transport channel of the detected channel information is different from the physical transport channel of the stored channel information, the controller 110 changes the minor number of the detected channel information and stores it in the storage 120.

2 is a diagram illustrating a region in which two or more broadcasts are received in one channel.

Referring to FIG. 2, the reception apparatus located in the middle region of the region where the Seoul MBC broadcast is received and the region where the Cheongju MBC broadcast is received is duplicated with the Seoul MBC and the Cheongju MBC in one channel. For example, in the case of Seoul MBC, the physical transport channel is 15, and in the case of Cheongju MBC, the physical transport channel is 20. The major / minor number of the MBC has the same number as the central broadcast (for example, 9-1) regardless of the region. In this case, the major and minor numbers of Seoul MBC and Cheongju MBC are 9-1, but the physical transport channels are different from 15 and 20, respectively. Therefore, when a broadcast signal having the same major / subnumber but a different physical transport channel is received in one channel (for example, CH9), the controller 110 determines the two broadcast signals as different broadcasts, and thus the minor number of the recently received broadcast signal. Change to save.

That is, when the Seoul MBC is previously set to channel 9, when the Cheongju MBC is received in the same channel, the physical transmission channels of the two broadcasts are different. .

However, even if the major / minus numbers are the same and the physical transport channels are different, the same contents may be received. In other words, the local broadcasting station does not transmit its own production, but retransmits the contents of the central broadcasting station as it is. In this case, it is not preferable to recognize different broadcasts as different physical transport channels and show the same program on two channels.

In this case, the controller 110 checks whether two broadcast signals are identical by using the program identification number detected by the channel information detector 100. When the program identification information of the detected channel information and the program identification information of the stored channel information are different, the controller 110 changes the minor number of the detected channel information and stores it in the storage 120.

For example, in the case of Seoul MBC having a major / minor number of 9-1 and Cheongju MBC, physical transport channels are different, and thus, each channel is determined to be different broadcast. In this case, in the case of transmitting the same program as that transmitted from the Seoul MBC to the Cheongju MBC, the two broadcast signals are recognized as the same broadcast signal and only one broadcast signal is output. However, in case of broadcasting program produced by Cheongju MBC, the program identification code is checked for the broadcasting signal transmitted from Seoul MBC and Cheongju MBC, and when there is a different identification code, the minor number of the currently detected channel information is changed. Recognize it as one channel.

3 is a flowchart illustrating a subchannel allocation method of a digital broadcasting receiver according to the present invention.

Referring to FIG. 3, the channel information detector 100 detects channel information from the received broadcast signal (S300). The main / minor number in the detected channel information is checked to determine whether a channel having the same channel information as the main / minor number of the detected channel information exists in the storage unit 120 (S310). If the detected channel information and the major / minor numbers of the channel information stored in the storage unit 120 are the same, it is checked whether the physical transmission channel of the detected channel information and the previously stored channel information is the same (S320). If the channel information identical to the major / minor number of the detected channel information does not exist, the detected channel information is stored (S330).

If the detected channel information and the physical transport channel of the pre-stored channel information is the same as the result of step S320 and maintains the current state (S340). If the detected channel information and the physical transmission channel of the pre-stored channel information are not the same as the result of the check in step S320, the subnumber of the detected channel information is changed and stored without step S350 (S360).

However, when two or more broadcast signals are received in one channel, if the main / minor numbers are the same and the physical transport channels are different, it is determined to be different broadcasts, and when each channel is allocated, the same broadcast signal is received although the physical transport channels are different. The case arises. In this case, it is not preferable to show the same broadcast on different channels.

Therefore, in this case, if it is determined in step S320 that the physical transport channels are not the same, it is checked whether the detected channel information and the program identification information of the pre-stored channel information are the same (S350). If the detected channel information and the program identification information of the pre-stored channel information are the same as the result of the check in step S350, the current state is maintained (S340). If the program identification information is not the same, the minor number of the detected channel information is changed and stored (S360).

Alternatively, if the main / minor number of the detected channel information and the pre-stored channel information are the same as detecting the channel information from the received broadcast signal, the detected channel information and the previously stored channel information are not compared with the physical transport channel. Determine whether the program identification information is the same. If it is determined that the program is different from each other, it is possible to classify a broadcast received only with the major / minor number and program identification information regardless of the physical transmission channel.

According to the subchannel allocation method of the digital broadcasting receiver and the digital broadcasting receiver according to the present invention, when a broadcast of two or more different contents is received through one channel, the physical transmission channel and the major / minor number of the received broadcasting signal are identified. Therefore, if the main / minus number is the same but the physical transport channel is different, the user can provide various broadcasts by changing and storing the minor number of the detected channel information. Therefore, even when the broadcast signals of different contents are received through the same channel as in the case of digital broadcast reception, the reception apparatus may provide various broadcasts to the user by storing different minor numbers of recently received broadcast signals.

Although the present invention has been described in detail through the representative embodiments, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the embodiments described above. I will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

Claims (6)

A channel information detector for detecting channel information including a major / minor number from a received broadcast signal; A storage unit storing at least one channel information; And And a controller configured to change the minor number of the detected channel information and store the stored minor in the storage unit when the detected major / subnumber of the channel information is the same as the stored major / subnumber of the channel information. Digital broadcasting receiver. The method of claim 1, The channel information further includes a physical transport channel through which the broadcast signal is received, The control unit controls to change the minor number of the detected channel information when the physical transport channel of the detected channel information is different from the physical transport channel of the stored channel information and to store the minor number in the storage unit. Digital broadcasting receiver. The method according to claim 1 or 2, The channel information further includes program identification information detected from the broadcast signal. The control unit controls to change the minor number of the detected channel information when the program identification information of the detected channel information and the stored program identification information of the channel information are different and store the stored information in the storage unit. Digital broadcasting receiver. Detecting channel information including a major / minor number from a received broadcast signal; And And changing and storing the minor number of the detected channel information when the major / minor number of the detected channel information is the same as the stored major / minor number of the channel information. Assignment method The method of claim 4, wherein The channel information further includes a physical transport channel through which the broadcast signal is received, The storing step may include changing and storing a minor number of the detected channel information when the physical transport channel of the detected channel information is different from the physical transport channel of the channel information stored therein. Way. The method according to claim 4 or 5, The channel information further includes program identification information detected from the broadcast signal. The storing step may include changing and storing a minor number of the detected channel information when the program identification information of the detected channel information and the stored program identification information of the channel information are different from each other. Way.

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