KR100827811B1 - Digital broadcasting system, dmb broadcasting system, digital broadcasting terminal and operating method - Google Patents

Abstract

A digital broadcasting system, a DMB(Digital Multimedia Broadcasting) system, a digital broadcasting terminal and an operating method are provided to transmit a compressed conditional access number by deleting a specific part of a value configuring a conditional access number, thereby reducing the amount of information necessary to transmit the conditional access number. A digital broadcasting system comprises a DMB system(10) and a digital broadcasting terminal(30). The DMB system transmits a compressed conditional access number to the digital broadcasting terminal by deleting a specific part of a value configuring a conditional access number for limiting broadcasting reception of the digital broadcasting terminal. The digital broadcasting terminal receives the compressed conditional access number from the DMB system, and decodes the conditional access number. If a specific part of the decoded conditional access number is consistent with a specific part of its conditional access number, the digital broadcasting terminal outputs digital broadcasting. A mobile communication system(20) relays the compressed conditional access number to the digital broadcasting terminal.

Description

Digital Broadcasting System, DMB Broadcasting System, Digital Broadcasting Terminal and Operation Method {DIGITAL BROADCASTING SYSTEM, DMB BROADCASTING SYSTEM, DIGITAL BROADCASTING TERMINAL AND OPERATING METHOD}

1 is a functional configuration diagram of a satellite digital broadcasting system of the present invention;

2 is a functional configuration diagram of the satellite DMB broadcasting system of FIG.

3 is a functional configuration diagram of the digital broadcasting terminal of FIG. 1;

4 is an operational flowchart of a digital broadcasting method of the satellite digital broadcasting system of the present invention;

5 is a flowchart illustrating a method of operating a satellite DMB broadcasting system;

6 is a flowchart illustrating a method of operating a digital broadcasting terminal;

7 is a functional block diagram of a terrestrial digital broadcasting system of the present invention;

8 is a flowchart of a digital broadcasting method of the terrestrial digital broadcasting system of the present invention.

<Explanation of symbols for main parts of the drawings>

10: satellite DMB broadcasting system 20: mobile communication system

30: digital broadcasting terminal

The present invention relates to a digital broadcasting system, a DM broadcasting system, a digital broadcasting terminal, and an operating method. In particular, the present invention relates to a digital broadcasting system, a DM broadcasting system, a digital broadcasting terminal, and an operating method which compresses an access control number and transmits the same to a digital broadcasting terminal. It is about.

Digital Multimedia Broadcasting (DMB) refers to a high-quality broadcasting service that allows users to enjoy various contents such as music, text, data, and video anytime, anywhere, even in a car running at 200 km / h.

Digital broadcast systems include satellite DMB services and terrestrial DMMB services. Satellite DMB service is composed of broadcasting satellite, gap filter, DMB terminal, and is a service that enables users to watch high-quality broadcasting anywhere in the country. The terrestrial DMMB service is composed of a broadcasting base station and a DMB terminal so that a high quality broadcasting can be viewed in a service area where a broadcasting base station is installed.

The DMB broadcasting system is classified into the satellite wave DMB and the terrestrial DMB, and receives the DMB broadcast by using a dedicated terminal. The DMB broadcast enables a selective reception of a paying user for broadcast reception using a conditional access system (CAS). The access control system transmits an access control number by allocating one channel among several channels used for broadcasting. The access control number is used as authentication information for a specific digital broadcasting terminal to control the output of the digital broadcasting.

The DMB broadcasting system assigns an access control number to each digital broadcasting terminal. This means that one access control number corresponds to one digital broadcasting terminal. The DMB broadcasting system must transmit each access control number to each terminal. As the number of digital broadcasting terminals serviced increases, the amount of information of the access control number also increases.

In addition, when the information amount of the access control number increases, there is a problem that the communication bandwidth allocated to transmitting the access control number of the broadcast channel also increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and by saving a certain part of the values constituting the access control number to transmit a compressed access control number, saving the communication bandwidth and other useful communication bandwidth It is an object of the present invention to provide a digital broadcasting system, a DM broadcasting system, a digital broadcasting terminal, and an operation method which can be allocated for transmitting information.

According to another aspect of the present invention, there is provided a DMB broadcasting system for transmitting a compressed access control number to a digital broadcasting terminal after a compression process of deleting a specific part of a value constituting the access control number; And a digital broadcast terminal that receives and decodes the compressed access control number and outputs a digital broadcast when a specific portion of the decoded access control number matches a specific portion of its access control number.

Preferably, the DMB broadcasting system collects and sorts the access control numbers, and then compares the values constituting each access control number. If it is shown, the digital broadcast system, characterized in that for deleting the remaining part to transmit a compressed access control number to the digital broadcasting terminal.

Preferably, the digital broadcasting system is further configured to include a mobile communication system for receiving a compressed access control number from the DMB broadcasting system to relay to the digital broadcasting terminal.

The DMB broadcasting system according to the present invention includes: a collecting unit collecting an access control number; a compressing unit outputting a compressed access control number by deleting a specific part of the values constituting the collected access control number; And a transmitter for transmitting the compressed access control number to the digital broadcasting terminal.

Preferably, the compression unit aligns the collected access control numbers and then compares the values constituting each access control number, so that the distribution of the values in all cases where a part of the aligned access control numbers are the same and the other part may be combined. If it is shown, characterized in that to output the compressed access control number by deleting the remaining part.

Preferably, the transmitting unit further comprises a relay unit for relaying the compressed access control number to the digital broadcasting terminal by the mobile communication system.

According to an aspect of the present invention, there is provided a digital broadcasting terminal comprising: a receiving unit which receives a compressed access control number from a DM broadcast system; A decoding unit for decoding the compressed access control number and outputting an access control number arranged in a series of numeric strings; And a broadcast control unit for outputting digital broadcast if the arranged access control number includes its own access control number.

Preferably, the DMB broadcasting system is configured as a satellite DMB broadcasting system or a terrestrial DMMB broadcasting system.

Preferably, the receiver further comprises a relay receiver for receiving the compressed access control number from the mobile communication system.

The digital broadcasting method of the present invention comprises the steps of: transmitting a compressed access control number to a digital broadcasting terminal through a compression process of deleting a specific part of a value constituting an access control number in a DM broadcast system; And receiving and decoding the compressed access control number at the digital broadcasting terminal and outputting the digital broadcast when the specific portion of the decoded access control number matches the specific portion of the access control number.

The DM broadcasting method of the DM broadcasting system according to the present invention comprises: a collecting step of collecting an access control number; A compression step of outputting a compressed access control number by deleting a specific part of the values constituting the collected access control number; And transmitting the compressed access control number to the digital broadcasting terminal.

Preferably, the compressing step includes the steps of aligning the collected access control numbers and comparing the values constituting each access control number; If the part of the sorted access control number is the same and the other part shows the distribution of the values in all cases that can be combined, the method may include deleting the remaining part and outputting the compressed access control number.

Preferably, the transmitting step further comprises a relaying step of relaying the compressed access control number to the digital broadcasting terminal by the mobile communication system.

A digital broadcasting method of a digital broadcasting terminal according to the present invention includes: a receiving step of receiving a compressed access control number from a DM broadcasting system; Decoding the compressed access control number and outputting an access control number arranged in a series of numeric strings; And a broadcast control step of outputting a digital broadcast if the arranged access control number includes its own access control number.

Preferably, the receiving step further comprises a relay receiving step of receiving a compressed access control number from the mobile communication system.

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

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

Hereinafter, the access control number refers to a number that controls access to the content of the digital multimedia broadcasting paid for the number corresponding to the specific digital broadcasting terminal.

1 is a functional configuration diagram of the satellite digital broadcasting system of the present invention, FIG. 2 is a functional configuration diagram of the satellite DMB broadcasting system of FIG. 1, and FIG. 4 is a functional configuration diagram of a digital broadcasting terminal, FIG. 4 is a flowchart illustrating a digital broadcasting method of the satellite digital broadcasting system of the present invention, FIG. 5 is a flowchart illustrating a method of operating a satellite DMB broadcasting system, and FIG. 6 is a flowchart illustrating a method of operating a digital broadcasting terminal. 7 is a functional block diagram of the terrestrial digital broadcasting system of the present invention, and FIG. 8 is a flowchart of the digital broadcasting method of the terrestrial digital broadcasting system of the present invention.

Referring to FIG. 1, a satellite digital broadcasting system according to an exemplary embodiment of the present invention will be described. The satellite DMB broadcasting system 10 compresses an access control number and transmits it to a broadcasting module through a CAS channel. It transmits to the mobile communication system 20. The mobile communication system 20 receives an access control number from the satellite DMB broadcasting system 10 and transmits it to a communication module. The communication module includes a storage module that receives an access control number from the mobile communication system 20 to manually or automatically connect a service to the broadcast module, and receives, stores, and utilizes CAS channel information. The broadcast module receives the access control number from the satellite DMB broadcasting system 10 and is connected manually or automatically from the communication module.

The broadcasting module of the satellite DMB broadcasting system 10 transmits the compressed access control number to the digital broadcasting terminal 30. In addition, the mobile communication system 20 relays the compressed access control number to the digital broadcasting terminal 30.

Next, the satellite DMB broadcasting system according to the present invention will be described in detail with reference to the following embodiments. From the following description of the access control number, the configuration of transmission and reception of the aforementioned access control number will also be clear.

FIG. 2 is a functional diagram of the satellite DMB broadcasting system of FIG. 1.

The collecting unit 11 of the satellite DMB broadcasting system 10 collects an access control number corresponding to the digital broadcasting terminal receiving the DMMB broadcasting. The compression unit 12 outputs the compressed access control number by deleting a specific part from the values constituting the collected access control number. At this time, the compression unit 12 aligns the collected access control numbers and compares the values constituting each access control number. In case of the above case, the compressed access control number may be output by deleting some other values that are not the same. The transmitter 13 transmits the compressed access control number to the digital broadcasting terminal. In addition, the transmitter 13 may transmit the compressed access control number to the mobile communication system and relay the compressed access control number to the digital broadcasting terminal by the mobile communication system.

Here, the specific part of the value constituting the access control number is deleted is set to a value that does not affect whether to authenticate the user of the terminal.

For example, suppose that digital broadcasting terminals having unique access control numbers such as 1000, 1001, 1010, 1011, etc. have subscribed to the satellite DMB broadcasting service. Therefore, the collecting unit 11 collects the unique access control number of the digital broadcasting terminal subscribed to the satellite DMB broadcasting service. Assume that an access control number corresponding to each digital broadcasting terminal should be transmitted in order to authenticate four terminals having access control numbers of 1000, 1001, 1010, and 1011 in the compression unit 12 of the satellite DMB broadcasting system. At this time, the compression unit 12 goes through an optimization operation instead of simply transmitting the access control numbers in order. In the optimization operation, the compression unit 12 may compress to 10XX using a binarization method. In other words, the first two digits are the same and the second two digits represent all distributions that can be represented by two digits 00, 01, 10, and 11. There is no need to determine whether or not to have it. Therefore, the compression unit 12 compresses the collected access control numbers and outputs an access control number of ten. Therefore, while 16 bits of information are required to authenticate four digital broadcasting terminals, the access control number can be transmitted with 8 bits of information according to the present invention. Considering the phenomenon that the access control number of the digital broadcasting terminal using satellite DMB is concentrated in a certain number band, it is possible to increase bandwidth utilization with greater efficiency.

3 is a functional configuration diagram of the digital broadcasting terminal of FIG. 1.

The receiver 31 of the digital broadcast receiver 30 receives the compressed access control number from the satellite DMB broadcasting system. The decoding unit 32 decodes the compressed access control number and outputs an access control number arranged in a series of numeric strings. The broadcast control unit 33 outputs the digital broadcast if the arranged access control number includes its access control number. The relay receiver connected to the receiver 31 receives the compressed access control number from the mobile communication system and transfers the access control number to the decoder 32.

For example, assume that the digital broadcast receiver 30 has 1001 as its access control number. When the receiving unit of the digital broadcasting receiver receives the compressed access control number 10, the decoding unit 32 decodes 10 and outputs the aligned access control numbers of 1000, 1001, 1010, and 1011, which are a series of numeric strings. The broadcast control unit 33 confirms that the access control number 1001 of the digital broadcast receiver is included in the series of string access control numbers and outputs the digital broadcast.

In addition, the satellite digital broadcasting system may be implemented by a processor such as a microcontroller capable of executing a program that performs a series of procedures. For example, the satellite DMB broadcasting system and the digital broadcasting receiver of the satellite digital broadcasting system may include a microcontroller.

Hereinafter, an operation flow of transmitting and receiving an access control number in a satellite digital broadcasting system implemented by a microcontroller will be described with reference to the drawings.

4 is a flowchart illustrating a digital broadcasting method of the satellite digital broadcasting system of the present invention, FIG. 5 is a flowchart illustrating a method of operating a satellite DMB broadcasting system, and FIG. 6 is a flowchart illustrating a method of operating a digital broadcasting terminal.

In the digital broadcasting method, the satellite DMB broadcasting system transmits a compressed access control number to the digital broadcasting terminal through a compression process of deleting a specific part of the value constituting the access control number, and the digital broadcasting terminal transmits the compressed access control number. Receives, decodes, and outputs a digital broadcast when a specific portion of the decoded access control number matches a specific portion of its own access control number.

In addition, the satellite DMB broadcasting system relays the compressed access control number to the digital broadcasting terminal by the mobile communication system.

In the DMB broadcasting method, the DMMB broadcasting system collects an access control number of a digital broadcasting terminal receiving DMB broadcasting, and outputs a compressed access control number by deleting a specific part from the values constituting the collected access control number. Here, the specific part of the value constituting the access control number is deleted is set to a value that does not affect whether to authenticate the user of the terminal.

In order to delete and compress certain values that do not affect the authentication, the collected access control numbers are first sorted and then the values constituting each access control number are compared. When a part of the sorted access control numbers are the same and the remaining parts show values in all cases that can be combined, the compressed access control numbers may be output by deleting some of the remaining non-identical values.

The DM broadcast system transmits the compressed access control number to the digital broadcasting terminal.

For example, assume that the access control number of the digital broadcasting terminal is a binary string. The DMB broadcasting system collects an access control number which is a binary number sequence, sorts the collected access control numbers, compresses a series of numeric strings, and reduces the number of bits of an expressible access control number. The DMB broadcasting system generates a compressed access control number removed by the number of bits that can be expressed as a predetermined number when the number of aligned access control numbers is greater than or equal to a predetermined number.

The DMB broadcasting system may directly transmit the compressed access control number to the digital broadcasting terminal or may relay the compressed access control number to the digital broadcasting terminal by the mobile communication system. At this time, the digital broadcasting terminal should be connected to the mobile communication system.

In the digital broadcasting method, the digital broadcasting terminal receives the compressed access control number from the DM broadcast system, decodes the compressed access control number, and outputs the access control numbers arranged in a series of numeric strings. The digital broadcast terminal outputs the digital broadcast if the aligned access control number includes its own access control number. The access control number is represented by a bit string of a certain size and the compressed access control number is smaller than a bit string of a certain size. The digital broadcasting terminal compares the bit stream of the compressed access control number with the bit stream of a predetermined size, generates bit streams sequentially arranged by the difference bit stream, and attaches the generated bit stream to the compressed access control number to the original access control number. Create

In addition, the digital broadcasting terminal may receive a compressed access control number from the mobile communication system.

7 is a functional block diagram of a terrestrial digital broadcasting system of the present invention, and FIG. 8 is a flowchart of a digital broadcasting method of the terrestrial digital broadcasting system of the present invention.

In the terrestrial digital broadcasting system, the terrestrial DMB broadcasting system 40 transmits an access control number through an audio / video channel. The digital broadcasting terminal 60 processes the access control number from the terrestrial DMB broadcasting system 40 to control audio / video of the digital broadcasting. The mobile communication system 50 receives the access control number from the terrestrial DMB broadcasting system 40 and transmits the access control number to the digital broadcasting terminal 60 through the communication network.

The structure of compressing and transmitting the access control number in the terrestrial DMB broadcasting system and decoding the compressed access control number in the digital broadcasting terminal is the same as described above, and the description of the operation is omitted.

Although the present invention has been described in more detail with reference to Examples, the present invention is not necessarily limited to these Examples, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, by deleting a certain part of the values constituting the access control number and transmitting the compressed access control number, there is an effect of reducing the amount of information required to transmit the access control number.

In addition, the present invention can save the communication bandwidth by compressing the access control number, so that the saved communication bandwidth can be allocated to the transmission of other useful information.

Claims (15)

A digital broadcasting system for limiting broadcast reception of a digital broadcasting terminal by using an access control number, A DM broadcast system for deleting a specific part of a value constituting an access control number for limiting broadcast reception of the digital broadcasting terminal and transmitting the compressed access control number to the digital broadcasting terminal; And a digital broadcasting terminal for receiving and decoding the compressed access control number from the DMB broadcasting system and outputting the digital broadcasting if a specific portion of the decoded access control number matches a specific portion of its access control number. system. The system of claim 1, wherein the DMB broadcasting system If a part of each access control number to be transmitted to the digital broadcasting terminal is the same and the other part shows a distribution of values in all cases that can be combined, transmitting the compressed access control number to the digital broadcasting terminal by deleting the remaining part. Digital broadcasting system characterized by. The method of claim 1, wherein the digital broadcasting system A mobile communication system for receiving a compressed access control number from a DM broadcast system and relaying the compressed access control number to a digital broadcasting terminal; Digital broadcasting system further comprises. A DM broadcast system for transmitting an access control number to limit broadcast reception of a digital broadcasting terminal, A collecting unit for collecting an access control number; A compression unit for outputting a compressed access control number by deleting a specific part of the values constituting the collected access control number; A transmitter for transmitting the compressed access control number to the digital broadcasting terminal; DMB broadcasting system comprising a. The method of claim 4, wherein the compression unit And a part of each of the collected access control numbers is the same and the other part shows a distribution of values in all possible combinations, and outputs a compressed access control number by deleting the remaining part. The method of claim 4, wherein the transmission unit And a relay unit which relays the compressed access control number to a digital broadcasting terminal by a mobile communication system. A digital broadcasting terminal for limiting broadcast reception using an access control number received from a DMB broadcasting system, A receiving unit for receiving a compressed access control number from the DM broadcast system; A decoding unit for decoding the compressed access control number and outputting an access control number arranged in a series of numeric strings; And a broadcast control unit for outputting a digital broadcast if the arranged access control number includes its own access control number. The system of claim 7, wherein the DMB broadcasting system A digital broadcasting terminal comprising a satellite DMB broadcasting system or a terrestrial DMMB broadcasting system. The method of claim 7, wherein the receiving unit And a relay receiver which receives the compressed access control number from the mobile communication system. A digital broadcasting method for limiting broadcast reception of a digital broadcasting terminal using an access control number, Transmitting, by the DMB broadcasting system, the compressed access control number to the digital broadcasting terminal through a compression process of deleting a specific part of the values constituting the access control number; The digital broadcasting terminal receiving the compressed access control number decodes the received compressed access control number, and outputs a digital broadcast when a specific portion of the decoded access control number matches a specific portion of its access control number. step; Digital broadcasting method comprising a. A DM broadcast system for restricting broadcast reception of a digital broadcasting terminal by a DM broadcast system, A collecting step of collecting an access control number to be transmitted to the digital broadcasting terminal; A compression step of outputting a compressed access control number by deleting a specific part of the values constituting the collected access control number; And a transmission step of transmitting the compressed access control number to the digital broadcasting terminal. The method of claim 11, wherein the compressing step Arranging the collected access control numbers and comparing the values constituting each access control number; If the part of the sorted access control number is the same and the other part shows the distribution of the values in all possible combinations, deleting the remaining part and outputting the compressed access control number, characterized in that the DMB broadcasting system is made. DMB broadcasting method. The method of claim 11, wherein the transmitting step And relaying the compressed access control number to the digital broadcasting terminal by the mobile communication system. A digital broadcasting method for limiting broadcast reception by a digital broadcasting terminal using an access control number received from a DMB broadcasting system, Receiving a compressed access control number from a DM broadcast system; Decoding the compressed access control number and outputting an access control number arranged in a series of numeric strings; And a broadcast control step of outputting a digital broadcast if the arranged access control number includes its own access control number. The method of claim 14, wherein the receiving step And a relay receiving step of receiving a compressed access control number from the mobile communication system.

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