KR20190080185A - Intelligent Channel Blocking System and Method for Blocking Interference Channel in Terrestrial Digital TV Broadcasting - Google Patents

Abstract

The present invention relates to an intelligent channel blocking apparatus for blocking a crosstalk channel in terrestrial digital TV broadcasting, which prevents the reception of a crosstalk channel coming from adjacent countries, not a permitted broadcasting signal; and to a method thereof. The intelligent channel blocking apparatus for blocking a crosstalk channel comprises: a crosstalk channel detector receiving a terrestrial broadcasting signal and extracting channel information of a crosstalk channel when the crosstalk channel is identified by channel searching; a crosstalk channel blocking information generator receiving the channel information of the crosstalk channel detected by the crosstalk channel detector, and allowing a digital TV broadcasting system to transmit a broadcasting signal including the crosstalk channel information; and a crosstalk channel limiting receiver acquiring the crosstalk channel information included in the broadcasting signal by the crosstalk channel blocking information generator, and blocking a user from viewing the crosstalk channel. Accordingly, provided is an effect of blocking the crosstalk channel which may be caused between countries.

Description

TECHNICAL FIELD [0001] The present invention relates to an intelligent channel blocking apparatus and method for blocking a terrestrial digital TV broadcast channel,

The present invention relates to an intelligent channel blocking apparatus and method for interrupting a terrestrial DTV broadcasting, and more particularly, to a terrestrial DTV broadcasting interrupting channel for blocking reception of a terrestrial channel from a neighboring country instead of an authorized broadcasting signal. To an intelligent channel blocking device and method.

Terrestrial digital TVs in Canada, Mexico, the United States, and Korea are broadcasted in the ATSC 1.0 format and include various data such as channel information, program information, and subtitle information as well as audio / video data. However, if there is a broadcasting signal transmitted from the neighboring country in the same way, it should be considered a method for blocking the reception of the broadcasting signal from the local station. In other words, when a broadcast signal from North Korea, Japan, or China can be received in Korea, it is necessary to provide a method for blocking the unauthorized broadcast signal from being received by a user of the Korean broadcasting company as an unauthorized broadcast signal. However, there is not yet a description of how to block reception.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an intelligent channel blocking apparatus and method for blocking interference channels that may come from neighboring countries.

According to an aspect of the present invention, there is provided a crosstalk channel restriction receiver for blocking a crosstalk channel in a digital TV broadcasting system, comprising: a reception signal unit for receiving channel data included in a broadcast signal; A signal processing unit for extracting at least one of an audio signal and a data signal and a channel information, a screen display unit for generating and displaying a screen to be output based on the signals extracted from the signal processing unit, And a crosstalk processing unit for blocking the channel reception in case of a crosstalk channel.

Here, the interference processing unit stores fixed broadcasting information including frequency information, a channel number, a channel name, and a TSID (Transport Stream Identifier) according to an area and a channel to which the terrestrial broadcast is transmitted, In particular, when channel scanning is performed, channel information of the scanned channel is deleted from the fixed broadcast information, and only the remaining channels can be viewed Information of the channel to be moved by the user is acquired and the channel is compared with the fixed broadcast information to determine whether or not the channel is a channel. Controls the display unit to display a warning message, Can be blocked.

A method for intercepting a crosstalk channel for intercepting a crosstalk channel in a crosstalk-limited receiver of a digital TV broadcasting system includes the steps of: acquiring position information of the crosstalk-channel limited receiver; acquiring fixed broadcast information according to the position information; , Scanning a channel, determining whether each of the scanned channels is valid, and storing the remaining channels as viewable channels except the channel determined to be invalid as a result of the validity determination.

A channel blocking method for blocking a channel in a channel of a user in a channel restriction receiver of a digital TV broadcasting system includes receiving a channel to be viewed from a user and receiving channel information for the channel from a broadcast signal Determining whether the channel is valid based on the channel information and the fixed broadcast information, and outputting a warning message to the screen and blocking the channel if the validity is not valid. Herein, the fixed broadcast information may include frequency information, a channel number, a channel name, and a TSID (Transport Stream Identifier) according to an area and a channel to which the terrestrial broadcast is transmitted, and the validity determination may include determining whether the channel information is included in the fixed broadcast information It can be determined that a channel that is not available is not valid.

According to an aspect of the present invention, there is provided a channel blocking system for blocking a channel in a digital TV broadcasting system, comprising: a terrestrial broadcast signal receiving unit for receiving a terrestrial broadcast signal; A channel blocking information generator for receiving the channel information of the terrestrial channel detected by the terrestrial channel detector and transmitting the digital TV broadcasting system including terrestrial channel information to the broadcasting signal, And a crosstalk channel restriction receiver for obtaining crosstalk channel information included in the broadcast signal by the information generator and blocking the user from watching the crosstalk channel.

A method for intercepting a crosstalk by a crosstalk cancellation system for intercepting a crosstalk channel in a digital TV broadcasting system includes the steps of extracting crosstalk channel information by a crosstalk channel detector and extracting the crosstalk channel information extracted by the crosstalk cancellation information generator (PSIP) information, and receiving the interference channel information from the PSIP information by the interference cancellation receiver, and blocking reception of the interference channel.

According to the present invention, there is an effect of blocking interfering channels that may occur between countries, and there is an effect of suggesting a method of blocking interfering channels at all times as well as temporarily.

1 is a diagram showing a terrestrial digital TV system proposed in the standard.
FIG. 2 is a diagram illustrating a digital TV broadcasting system including a system for blocking a trunk channel according to an embodiment of the present invention. Referring to FIG.
FIG. 3 shows a schematic block diagram of a crosstalk channel limiting receiver 510. In FIG.
FIG. 4 illustrates a method for temporarily blocking a crosstalk according to an embodiment of the present invention. Referring to FIG.
FIG. 5 illustrates a method of interrupting a crosstalk channel during a channel scan.
FIG. 6 illustrates a method for blocking a crosstalk channel when a user moves a channel.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

If any part is referred to as being "on" another part, it may be directly on the other part or may be accompanied by another part therebetween. In contrast, when a section is referred to as being "directly above" another section, no other section is involved.

The terms first, second and third, etc. are used to describe various portions, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish any moiety, element, region, layer or section from another moiety, moiety, region, layer or section. Thus, a first portion, component, region, layer or section described below may be referred to as a second portion, component, region, layer or section without departing from the scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified and that the presence or absence of other features, regions, integers, steps, operations, elements, and / It does not exclude addition.

Terms indicating relative space such as "below "," above ", and the like may be used to more easily describe the relationship to other portions of a portion shown in the figures. These terms are intended to include other meanings or acts of the apparatus in use, as well as intended meanings in the drawings. For example, when inverting a device in the figures, certain portions that are described as being "below" other portions are described as being "above " other portions. Thus, an exemplary term "below" includes both up and down directions. The device can be rotated by 90 degrees or rotated at different angles, and terms indicating relative space are interpreted accordingly.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a diagram showing a terrestrial digital TV system proposed in the standard.

Referring to FIG. 1, a terrestrial digital TV system for watching terrestrial digital broadcasting may include a broadcasting system 100, a broadcasting transmission system 200, and a receiver 300. The receiver 300 is a digital TV provided in each home and can receive and decode data encoded in the broadcasting system 100 and transmitted from the broadcasting transmission system 200 and display the decoded data on the screen. In the conventional analog broadcasting, a broadcasting program is selected and viewed based on a channel number corresponding to a broadcasting frequency. However, a digital broadcasting program is served to viewers on a virtual channel basis, and a viewer can watch a broadcast by selecting a virtual channel. The standard suggests that a virtual channel can be composed of a combination of major and minor channel numbers of PSIP (Program and System Information Protocol). For more details on this, refer to TTAS.KO-07.0014, Standard for Terrestrial Digital TV Broadcasting Transmission and Reception, which is a standard of information and communication organizations.

The broadcasting system 100 includes a program encoding unit 110 that encodes a plurality of programs and a multiplexing unit 120 that multiplexes data encoded on a program-by-program basis. The broadcasting system 100 configures broadcasting transmission information, A service can be encoded and multiplexed to generate a frame for broadcasting transmission and transmitted to the broadcasting transmission system 200. The broadcasting transmission system 200 includes a modulation unit 210 and an antenna 220 and performs modulation on the frame received from the broadcasting system 100 and then transmits the frame through the antenna 220. [ At this time, the broadcasting transmission system 200 may be installed apart from the broadcasting system 100 locally, or may be installed at a plurality of places to transmit the same data while covering different areas.

However, a signal transmitted from another broadcasting company of another station (hereinafter referred to as a interfering signal 400) may arrive at the receiver 300. If the interference signal 400 is broadcast using the same protocol as the domestic broadcast, the receiver 300 can decode the data from the interference signal 400 to obtain the interference channel. This results in receiving unauthorized broadcasting at home and it is necessary to prevent this.

FIG. 2 is a diagram illustrating a digital TV broadcasting system including a system for blocking a trunk channel according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 2, the digital TV broadcasting system may include a crosstalk detector 530, a crosstalk blocking information generator 520, and a crosstalk channel limiting receiver 510 to block the crosstalk channel.

The interference channel detector 530 may be located at an arbitrary position and receives a terrestrial broadcast signal. If the interference channel is detected by detecting a terrestrial broadcast signal, the interference detector 530 extracts channel information of the interference channel and outputs channel information of the interference channel, Generator 520 as shown in FIG. At this time, it is possible to transmit interference channel information using an IP network (IP Network) 600.

Herein, when the channel information of the scanned channel is not included in the fixed broadcasting information, the channel information of the scanned channel is recognized as a mixed channel, It is possible to extract the channel information of the channel from the channel information of the interference channel.

The interference cancellation information generator 520 may be coupled to the broadcasting system 100 and processes the information so as to be able to receive the interference channel information and to receive the broadcasting signal of the terrestrial digital TV. The related information is provided at the time of configuration so that the broadcast signal to be transmitted can include the interference channel information.

The interference channel limiting receiver 510 may include the function of blocking the interference channel additionally while retaining the function of the receiver 300 in each home. That is, the interference cancellation receiver 510 may acquire the interference channel information transmitted by the broadcasting system 100 and automatically block the interference channel.

At this time, the interference channel information may be a frequency, a PID (Program ID), a stream type of a video / audio (stream_type), a TSID (Transport Stream ID), a channel number, a channel name, . Such interference channel information may be defined and transmitted in the form of a user defined descriptor of a program map table (PMT) and a terrestrial virtual channel table (TVCT). Here, the TSID represents a unique number of a broadcasting station that produces and transmits a broadcasting program, and may have different values for each broadcasting program.

The interference channel information from the interference channel detector 530 to the interference cancellation information generator 520 can be transmitted using the IP network so that the interference channel information can be transmitted in one format such as text, Lt; / RTI >

FIG. 3 shows a schematic block diagram of a crosstalk channel limiting receiver 510. In FIG.

3, the interference cancellation receiver 510 may include a signal reception unit 511, a signal processing unit 513, a screen display unit 515, and a interference processing unit 517.

The signal receiving unit 511 can receive and transmit channel data included in the broadcast signal received from the antenna. The signal receiving unit 511 can receive channel data by tuning to a frequency corresponding to the channel based on the channel information input by the user. The received channel data is transmitted to the signal processing unit 513. The signal processor 513 processes the received channel data to extract channel information, a video signal, an audio signal, and other data signals. The screen display unit 515 can output an image or the like to the screen based on the signals extracted from the signal processing unit 513. [ The signal receiving unit 511, the signal processing unit 513 and the screen display unit 515 may be the same as those of the conventional digital TV. However, the signal processing unit 513 may additionally include a function of transmitting necessary data to the interference processing unit 517 Lt; / RTI >

The interference processing unit 517 acquires the channel information from the signal processing unit 513, determines whether it is a mixed channel based on the channel information, and blocks the interference channel if it is a mixed channel.

Particularly, the interference cancellation includes intermittent interference cancellation and continuous interference cancellation using fixed broadcast information. In case of intermittent interference cancellation using fixed broadcast information, interference cancellation receiver 510 can be performed alone, The temporary crosstalk cancellation may be performed in cooperation with the crosstalk channel detector 530 and the crosstalk cancellation information generator 520.

First, the temporary interference cancellation will be described.

FIG. 4 illustrates a method for temporarily blocking a crosstalk according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 4, when it is recognized that there is a crosstalk channel, crosstalk channel information is extracted (S410). The interference channel information extraction may be performed in the interference channel detector 530. When the interference channel information is extracted, the interference cancellation information generator 520 adds the extracted information to the PSIP information and transmits it to the interference channel restriction receiver 510 (S420). At this time, the interference channel information can be transmitted using a plurality of frequencies. If a broadcasting station of another country broadcasts at the same frequency as the broadcasting frequency in Korea, reception of broadcasting data may not be possible at all due to interference between the broadcasting stations. In this case, it is impossible to receive the interference channel information, which is a problem. To solve this problem, it is possible to transmit information on the interference channel to a plurality of channel frequencies. That is, when a single broadcaster uses a plurality of channel frequencies, the channel information may be transmitted and transmitted to all channel frequencies or some channel frequencies used. For example, in the case of a dynamic sound wave to be described later, the A broadcasting station uses channels 15, 30, and 40 for broadcasting, and when the channel 15 is a mixed channel, it can not receive broadcasting data due to interferences between the channels . Therefore, it is possible to transmit information informing that channel 15 is a mixed channel even in channels 30 and 40.

The interference channel restriction receiver 510 analyzes the PSIP information to obtain interference channel information, and if it is watching a channel identified as a interference channel, it immediately blocks the viewing and blocks the reception of the channel (S430). That is, the interference processing unit 517 of the interference cancellation receiver 510 obtains the PSIP included in the broadcast signal from the signal processor 513, acquires the interference channel information through the PSIP information analysis, It is possible to immediately stop the screen display and display a screen warning that the channel is a mixed channel. Here, the PSIP information analysis may be performed in the signal processing unit 513 and only the information related to the interference channel may be acquired from the signal processing unit 513. [

When the co-channel broadcast is completed, the co-channel detector 530 can no longer extract the co-channel information, and if the co-channel information is no longer extracted, the PSIP data editing related to the co-channel information is stopped (S440). Upon detecting that the corresponding channel is no longer a mixed channel through the analysis of the received PSIP information, the interference cancellation receiver 510 cancels the blocking function for the corresponding channel (S450).

Through the above-described method, the interference cancellation system can temporarily block the interference channel from being watched by the viewer.

As another blocking method, there is a method of blocking the interference channel at all times using the fixed broadcast information. In this method, a crosstalk detector 530 and a crosstalk cancellation information generator 520 are unnecessary and can be implemented only with a crosstalk channel limiting receiver 510.

Here, the fixed broadcast information means a combination of TVCT information including frequency information for each region / channel to which the terrestrial broadcast is transmitted, TSID, channel number, channel name, and the like. In particular, referring to Annex 2 of the terrestrial digital TV broadcast transmission / reception association standard (TTAS.KO-07.0014), which is an information communication standard, the TSID of the TVCT among the fixed broadcast information is determined according to DTV status, terrestrial status, Channel name, and channel frequency information of the currently input stream to detect and intercept the interference channel. Also, since main channel and subchannel information and channel name information are used differently according to broadcasting companies, it can be used to recognize and block the interference channel.

In addition, the interference channel limiting receiver 510 determines the candidate channel frequency according to the current reception position. For example, in the case of Donghae, broadcasts can be received from four broadcasting transmission systems 200 of Phongsan San, Kungbang Mountain, Mt. Hambae, and Greenrock. In case of A broadcasting station, the channel frequencies used for transmission in each broadcasting transmission system 200 Accordingly, the reception candidate channel frequency at the interference channel restriction receiver 510 may be a frequency of 15th, 30th, and 40th.

The method of limiting the interference channel by the interference cancellation receiver 510 may include a method of blocking the interference channel in the automatic channel scan and a method of blocking the interference channel in the channel movement.

In the case of not receiving directly through a broadcast receiving antenna, such as a cable TV, an indoor broadcasting, and an IP TV, an available channel scanning method can be used to scan and store available channels. In this case, there is no possibility that a broadcast channel by a broadcasting station transmitted from a broadcasting station of another country will be introduced. However, in the case of direct reception through the broadcast receiving antenna, it is necessary to remove the interference channel at the time of scanning.

FIG. 5 illustrates a method of interrupting a crosstalk channel during a channel scan.

Referring to FIG. 5, the interference channel restriction receiver 510 acquires location information for receiving a broadcast (S510). This can be done by user input, or it can be equipped with a device such as GPS and automatically check the actual position. The fixed broadcast information according to the reception position can be acquired (S520) and stored. The fixed broadcast information may be a combination of TVCT information including channel-specific frequency information and a TSID, a channel number, and a channel name that can be received at the current location. Such information may be obtained through a separately connected Internet or may be acquired using a data service added to a broadcast signal.

Then, the channel is scanned according to the existing channel scanning method (S530), and the validity of each of the scanned channels is determined (S540). The determination of validity may be made by comparing the obtained fixed broadcast information with the channel information of the scanned channel and judging that the channel information of the scanned channel is not valid when it is not included in the fixed broadcasting information. Conversely, when the channel information of the scanned channel is included in the fixed broadcast information, it can be determined that the channel information is valid. For example, if the frequency of the scanned channel is the A-use frequency, but the broadcasting station information included in the TSID indicates the B broadcasting station, it can be determined that the frequency is not valid because it is inconsistent with the fixed broadcasting information. In another embodiment, it can be determined that the frequency of the scanned channel is not valid even when the frequency of the scanned channel is not in the frequency list that can be received at the current position. As a result of the validity determination, if the remaining channels other than the invalid channels are viewed, the related information can be stored (S550).

In this way, the interference cancellation receiver 510 can delete a channel that is not valid in advance when the first channel is scanned.

FIG. 6 illustrates a method for blocking a crosstalk channel when a user moves a channel.

For example, if the viewer wants to move the channel to the B channel while viewing the A channel, the interference cancellation receiver 510 first receives the channel information before outputting the screen (S610) and determines whether the channel is valid (S620 )do. That is, when the user desires to move to the B channel, the antenna tunes to the frequency corresponding to the B channel, receives the B channel data, and obtains the channel information from the received data. If the channel information matches the previously stored fixed broadcast information, it is determined that the channel is an effective channel. If the channel information does not match, it is determined that the channel is a mixed channel. If the channel is determined to be an effective channel, the corresponding screen of the channel is output to the monitor. If it is determined that the channel is a mixed channel, a warning message indicating that the channel is a mixed channel is displayed on the screen and the corresponding channel is blocked (S630). After the channel is blocked, a warning message may be displayed on the screen or automatically changed to another channel until another channel input is made by the user. That is, it can automatically change to the channel that was previously viewed by the user or the channel closest to the channel the user was trying to move.

As described above, the present invention provides various methods for blocking a channel, thereby preventing unauthorized broadcasting from being displayed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims and their equivalents. Only. It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. .

100: broadcasting system
110: Program encoding section
120: multiplexer
200: Broadcast transmission system
210:
220: antenna
300: Conventional receiver
400: Interference signal
510: Inter-channel limited receiver
520: Inter-channel blocking information generator
530: Interference channel detector
600: IP network

Claims (10)

A channel-limited receiver for blocking a channel in a digital TV broadcasting system,
A reception signal unit for receiving channel data included in a broadcast signal;
A signal processor for processing the channel data to extract at least one of a video signal, an audio signal, and a data signal and channel information;
A screen display unit for generating and displaying a screen to be output based on signals extracted from the signal processing unit; And
Determining whether a channel is a channel based on the channel information, and blocking a channel when the channel is a channel,
Interference channel limited receiver.
The method according to claim 1,
The interference processing unit stores fixed broadcast information including frequency information according to an area and a channel to which the terrestrial broadcast is transmitted and a TSID (Transport Stream Identifier)
Determining whether a channel is a channel based on the fixed broadcast information and the channel information,
Interference channel limited receiver.
3. The method of claim 2,
When channel scanning is performed, the interference processing unit
The channel information of the scanned channel for each of the scanned channels is deleted from the fixed broadcast information,
Interference channel limited receiver.
3. The method of claim 2,
When the channel is moved by the user, the interference processing unit
The control unit controls the display unit to display a warning message in case of a mixed channel, and controls the display unit to display a channel to be moved by the user Blocking,
Interference channel limited receiver.
A channel blocking method for blocking a channel in a channel restriction receiver of a digital TV broadcasting system,
Obtaining positional information of the interference-limited channel receiver;
Obtaining fixed broadcast information according to the location information;
Scanning a channel;
Determining whether each of the scanned channels is valid; And
Storing a remaining channel as a viewable channel except for a channel determined to be invalid as a result of the validity determination; / RTI >
How to block interference channels.
A channel blocking method for blocking a channel in a channel restriction receiver of a digital TV broadcasting system,
Receiving a channel to be viewed from a user;
Receiving channel information for the channel from a broadcast signal;
Determining whether the channel is valid based on the channel information and the fixed broadcast information; And
Outputting a warning message to the screen and blocking the channel if the validity is not valid; / RTI >
How to block interference channels.
The method according to claim 5 or 6,
The fixed broadcast information includes frequency information, a channel number, a channel name, and a TSID (Transport Stream Identifier) according to an area and a channel to which the terrestrial broadcast is transmitted.
How to block interference channels.
8. The method of claim 7,
Wherein the determining whether the channel information is not included in the fixed broadcast information is determined to be invalid,
How to block interference channels.
A channel blocking system for blocking a channel in a digital TV broadcasting system,
A crosstalk channel detector for receiving a terrestrial broadcast signal and extracting channel information of a crosstalk channel when a channel is detected and a crosstalk channel is recognized;
A channel blocking information generator for receiving the channel information of the terrestrial channel detected by the terrestrial channel detector and transmitting the terrestrial broadcast signal including the terrestrial channel information to the digital TV broadcasting system; And
And a crosstalk channel restriction receiver for obtaining crosstalk channel information included in a broadcast signal by the crosstalk cancellation information generator and blocking the crosstalk channel from being viewed by a user,
Interference channel blocking system.
A method for intercepting a crosstalk channel by a crosstalk channel blocking system for blocking a crosstalk channel in a digital TV broadcasting system,
Extracting crosstalk channel information by a crosstalk channel detector;
Transmitting the interference channel information extracted by the interference channel blocking information generator to PSIP (Program and System Information Protocol) information and transmitting the information; And
Acquiring the crosstalk channel information from the PSIP information by a crosstalk channel restriction receiver and blocking reception of the crosstalk channel;
How to block interference channels.

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