KR101934105B1 - Cable broadcasting service system and service method based on cable convergence solution - Google Patents

Abstract

The present invention relates to a method and apparatus for receiving a digital cable broadcasting signal transmitted from a transmission system of a cable broadcasting station through a coaxial cable network and for each channel program classified from the received digital cable broadcasting signal, And a second partial value forming an IP address is generated by substituting the number information related to the program for each channel into the setting calculation expression to generate an IP address for each channel program, An IP gateway for transmitting a program for each channel to an IP network and a function for generating an IP address IP address for each channel program in the same manner as the IP gateway with the same frequency mapping information as the IP gateway , Generates an IP address corresponding to the program or VOD of the channel requested by the user And a cable broadcast receiver for transmitting a broadcast request signal including the generated IP address as a destination address to the IP network and receiving corresponding broadcast information, and a service method thereof.

Description

[0001] CABLE BROADCASTING SERVICE SYSTEM AND SERVICE METHOD BASED ON CABLE CONVERGENCE SOLUTION [0002]

The present invention relates to a Cable Convergence Solution (CCS) based cable broadcasting service system and a service method.

Currently, a cable broadcasting company provides an Internet service in addition to a TV broadcasting service using the cable broadcasting infrastructure network shown in FIG. 1 is a diagram showing a conventional cable broadcasting infrastructure network. 1, a conventional cable broadcasting infrastructure network includes a coaxial cable network 20 for transmitting broadcast information (for example, real-time broadcasting information, video-on-demand information broadcast on demand), packets and the like transmitted to a cable broadcasting company 10, A cable broadcasting receiver 30 connected to the network 20 to receive and distribute broadcast information or packets, and a computer 41 (PC, notebook computer, etc.) 41 and a TV 42 which are end terminals connected to a cable broadcasting receiver . Here, the TV 42 is electrically connected to receive, receive, and transmit analog or digital broadcasting signals, and the computer 41 is connected to the cable broadcasting receiver via the Internet to enable Internet communication or Internet telephone.

In order to enable Internet service through a coaxial cable network, a cable modem termination system (CMTS) (A) is conventionally provided in the transmission system 10a of the cable broadcasting company 10 as shown in FIG. 2 And a cable modem B must be installed in the cable broadcasting receiver 30.

In addition, the conventional cable broadcasting infrastructure network includes an infrastructure network using a coaxial cable network, an IP network 50 connected to the cable broadcasting company 10, and a packet signal received from the IP network 50, And an infrastructure network using an IP network including a network switch 60 and a PC 43 connected to the network switch 60 and receiving a packet signal. Here, the IP network is a network for providing Internet service (Internet communication, Internet telephone, etc.) to the PC 43.

Such a conventional cable broadcasting infrastructure network has a different cable standard (quality) according to the time when the building is built, so that the frequency band that can be transmitted to the coaxial cable is limited. For example, the frequency band that can be used for cable broadcasting is 54 MHz to 1002 MHz. Depending on the time of building, the cable standard that is installed in the premises is limited to the frequency range of 650 MHz, 750 MHz, 2500 Mhz, According to the in-building coaxial cable standard of a building, a cable broadcaster can not provide some channels or services to a customer.

Conventional cable broadcasting infrastructure networks have limited frequency resources that can be used by cable broadcasters due to limitations on the support specifications of parts. For example, as cable broadcasting receivers are launched with products that are only supported up to the 870 MHz band, there is a restriction that the available frequencies of the cable broadcasters can be used up to the 1002 MHz band.

In the cable broadcasting infrastructure network, if the coaxial cable of the subscriber network is out of date, the maintenance is difficult and the maintenance cost is increased, and the quality of the broadcast signal received by the cable broadcasting receiver is deteriorated due to the noise due to aging.

The present invention provides a CCS-based cable broadcasting service system and a service method for improving the existing problems by utilizing the infrastructure network of a cable broadcasting company that is currently being constructed and operated as efficiently as possible.

The present invention provides a CCS-based cable broadcasting service which maximizes the utilization of a coaxial cable network and an IP network of a cable broadcasting company that is currently being constructed and operated and provides various IP-based broadcast and interactive services in an end terminal, System and service method.

Embodiments according to the present invention can be used to accomplish other tasks not specifically mentioned other than the above-described tasks.

According to an aspect of the present invention, there is provided a CCS-based cable broadcasting service system for receiving a digital cable broadcasting signal transmitted from a cable broadcasting transmission system through a coaxial cable network, The first partial value constituting the IP address is identified through the frequency mapping information for each channel program and the second partial value constituting the IP address is generated by substituting the number information related to the program for each channel into the setting calculation expression, An IP gateway for generating an IP address for a separate program and transmitting the program for each channel to the IP network by using the generated IP address as a destination multicast IP address and having the same frequency mapping information as the IP gateway, Create an IP address for each channel's program in the same way as When a user selects a program or VOD of a channel, it creates an IP address and transmits the broadcast request signal used as a multicast IP address to the IP network to the IP network, And a receiving cable broadcasting receiver.

The frequency mapping information is information in which the first partial value is recorded corresponding to a frequency for each channel, and the number information related to the program for each channel is at least one of a program number and a long-form channel number.

The first partial value is two values of (A.BC.D.) forming the IPv4 address system, and the second partial value is the remaining two values of (A.BC.D). The first partial value may be an A and a B value among (A.BC.D.) values forming an IPv4 address system, and the second partial value may be a C and a D value.

The IP gateway sets frequency mapping rules, generates the frequency mapping information according to the frequency mapping rules, and provides the generated frequency mapping information to each cable broadcasting receiver to share the generated frequency mapping information.

According to another aspect of the present invention, there is provided a method of providing a CCS-based cable broadcasting service, the method comprising: registering a frequency mapping rule received by an IP gateway connected to a cable broadcasting transmission system and a coaxial cable network; Generating frequency mapping information in which a first partial value constituting an IP address is registered corresponding to a frequency for each channel according to a mapping rule, providing frequency mapping information generated by the IP gateway to each cable broadcasting receiver, The IP gateway uses the frequency mapping information and the number information related to the program for each channel for each program of each channel of the digital cable broadcasting signal received through the coaxial cable network, Generating, by the IP gateway, And transmitting the IP signal to an IP network having an IP address as a destination address, wherein each of the cable broadcast receivers includes a program of a channel selected by the user or a VOD Generating an IP address corresponding to a broadcast in the same manner as the IP gateway, and transmitting a broadcast request signal having an IP address generated by each cable broadcast receiver as a destination address to an IP network and receiving corresponding broadcast information .

According to the embodiment of the present invention, after the broadcast and internet traffic separation is configured up to the main base point, the coaxial cable network and the IP network are combined through the IP gateway to provide a variety of broadcast and interactive services to subscribers, It is possible to maximize the utilization of coaxial cable network and IP network.

In addition, according to the embodiment of the present invention, it is possible to provide all kinds of services that a cable broadcaster provides to subscribers, such as real-time broadcasting, on-demand VOD, and interactive services such as the Internet.

In addition, according to the embodiment of the present invention, broadcasting and Internet services can be performed without changing the existing transmission / operation system through application of the dynamic destination IP address allocation method to IP conversion transmission of real-time broadcast and on-demand VOD service.

1 is a diagram showing a conventional cable broadcasting infrastructure network.
2 is a block diagram showing a conventional cable broadcasting service system.
3 is a conceptual diagram of a CCS-based cable broadcasting service according to an embodiment of the present invention.
4 is a configuration diagram illustrating a CCS-based cable broadcasting service system according to an embodiment of the present invention.
5 is a block diagram of an IP gateway according to an embodiment of the present invention.
6 is a block diagram of a cable broadcasting receiver according to an embodiment of the present invention.
7 is a flowchart illustrating a CCS-based cable broadcasting service method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are used for the same or similar components throughout the specification. In the case of publicly known technologies, a detailed description thereof will be omitted.

In this specification, when a part is referred to as " including " an element, it is to be understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, the terms " part, " " module, " and the like, which are described in the specification, refer to a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

Hereinafter, a CCS-based cable broadcasting service system and a service method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

3, the concept of a CCS-based cable broadcasting service according to an embodiment of the present invention will be described. 3 is a conceptual diagram of a CCS-based cable broadcasting service according to an embodiment of the present invention.

Referring to FIG. 3, the present invention provides a CCS-based cable broadcasting service. The CCS-based cable broadcasting service according to the embodiment of the present invention can transmit cable broadcasting information (e.g., real-time cable broadcasting information and on-demand video broadcasting information) transmitted through a coaxial cable network to a cable broadcasting receiver To be transmitted.

According to the embodiment of the present invention for such a CCS-based cable broadcasting service, an IP conversion apparatus 100 for dynamically generating a multicast IP address is used, and also an IP address And uses the generated IP address as a multicast IP address to be received by the cable broadcast receiver 30a. Also, the dynamically generated IP address varies depending on the channel-specific frequency and channel-specific program. Accordingly, if the IP address dynamically generated by the IP broadcasting apparatus 100 and the cable broadcasting receiver 30a are the same, the digital cable broadcasting program transmitted from the IP broadcasting apparatus 100 through the IP network is transmitted to the target cable broadcasting receiver (30a).

More specifically, the IP broadcasting apparatus 100 and the cable broadcasting receiver 30a use the frequency mapping information P1 and the dynamic IP address generation function P2 set to generate the dynamic IP.

The IPv4 address scheme has the form (A.BC.D). The value A is "112", the value B is "305", the value of C is "45", and the value of D is "6" when (A.B.C.D.) of the IPv4 address is (112.305.45.6) In the IPv4 address scheme, the CCS-based cable broadcasting service according to the embodiment of the present invention grasps the fixed A value and B value according to the frequency mapping information P1, Generate a value and a D value to generate an IP address of the form (ABC D). At this time, the dynamic IP address generation function P2 generates an IP address using a program number (Program ID) or generates an IP address using a long form channel number or a program number and a long form channel number . Of course, in addition to the program number and the long form channel number, information indicating a number among the information included in the cable broadcasting information can be used.

Here, the frequency mapping information P1 is information in which the A value and the B value are associated with each frequency band of each channel of the cable broadcasting. For example, the A value and the B value correspond to the frequency of each channel, . The frequency mapping information P1 is generated according to the frequency mapping rule P3 mounted on the IP conversion apparatus 100 and the IP conversion apparatus 100 transmits the generated frequency mapping information P1 to each cable broadcast receiver 30a. To share with each other. The frequency mapping rule (P3) is managed and changed by the cable broadcaster.

Accordingly, according to the embodiment of the present invention, the cable modem termination system (CMTS) (A in FIG. 2) is not used in the transmission system of the cable broadcasting by the IP broadcasting apparatus 100, 2B) may not be used. The cable broadcasting receiver 30a according to the embodiment of the present invention can be realized by mounting the frequency mapping information P1 in the conventional cable broadcasting receiver 30 in FIG. 2 and having the dynamic IP address generating function P2. The present invention can be applied to a CCS-based cable broadcasting service according to an embodiment of the present invention.

Hereinafter, a CCS-based cable broadcasting service system according to an embodiment of the present invention will be described with reference to FIG. 4 is a configuration diagram illustrating a CCS-based cable broadcasting service system according to an embodiment of the present invention.

Referring to FIG. 4, the CCS-based cable broadcasting service system according to the embodiment of the present invention includes an IP gateway 100 and a cable broadcasting receiver 30a.

The IP gateway 100 corresponds to the IP broadcasting apparatus 100 described with reference to FIG. 3 and is connected to the transmission system 10b of the cable broadcasting company and the coaxial cable network 20, and is connected to the network switch 60. The IP gateway 100 converts digital cable broadcasting signals (real-time broadcast signals, video-on-demand video signals, etc.) transmitted through the coaxial cable network 20 into IP signals used in the IP network and transmits the IP signals. At this time, the IP gateway 100 dynamically obtains an IP address by using at least one of the previously stored frequency mapping information (P1 in FIG. 3), the program number and the long form channel number corresponding to the received digital cable broadcasting signal Generates an IP address using the generated dynamic IP address generation function (hereinafter, it is the same as the IP address generation algorithm), and transmits the digital cable broadcasting signal as an IP signal conforming to the Internet protocol using the generated IP address.

The cable broadcasting receiver 30a is connected to the network switch 60 and is connected to an end terminal such as the PC 41 or the TV 42. [ The cable broadcast receiver 30a transmits the broadcast information received from the network switch 60 to the PC 41 or the TV 42 or the user's channel or VOD selection signal received from the PC 41 or the TV 42 Generates a program corresponding to the corresponding channel or an IP address corresponding to the VOD in response to the network switch 60, transmits a request signal to the IP network, the IP address being a multicast IP address to be received, Through the IP network, broadcast information corresponding to the broadcast information or the corresponding VOD.

The cable broadcasting receiver 30a has a fixed IP address set for the Internet service, and a dynamic IP address is generated for the digital cable broadcasting service whenever necessary. Accordingly, if the user requests an Internet service using an Internet terminal such as a PC, the cable broadcasting receiver 30a requests the service to the network switch 60 using the fixed IP address, In the case of requesting a digital cable broadcasting service such as video-on-demand broadcasting, at least one of frequency mapping information (P1 in FIG. 3), a program number and a long form channel number is used or an IP address is dynamically generated and an IP address And requests the network switch 60 for the corresponding service.

The network switch 60 is a communication device for connecting network units, and is a conventional network switch called a switching hub and a port switching hub. The network switch 60 distributes an IP packet signal or an IP streaming signal received from the IP network 50 connected to the IP gateway 100 or the transmission system 10b to one or more signals, (Destination address) of the broadcast request signal or the VOD request signal received from the cable broadcasting receiver 30a is the IP packet signal or the destination IP address of the IP streaming Address, it transmits the IP packet signal or the IP streaming to the corresponding cable broadcasting receiver 30a. Here, at least one network switch 60 is located between the IP gateway 100 and the cable broadcast receiver 30a.

On the other hand, the transmission system 10b does not use the cable modem termination system (CMTS), unlike the conventional transmission system that uses the cable modem termination system (CMTS). That is, the conventional transmission system provides VOD broadcasting information (video broadcast information on demand) from a customized VOD server in the transmission system to a cable modem termination system (CMTS) and sends VOD broadcasting information from the cable modem termination system (CMTS) The transmission system 10b applied to the embodiment of the present invention provides VOD broadcasting information to the network switch 60 directly from the VOD server in the transmission system 10b.

Therefore, the cable broadcasting transmission system 10b applied to the CCS-based cable broadcasting service according to the embodiment of the present invention is one of various types of transmission systems generally used except for not using the CMTS A detailed description will be omitted.

Hereinafter, an IP gateway 100 according to an embodiment of the present invention will be described with reference to FIG.

5 is a block diagram of an IP gateway according to an embodiment of the present invention. Referring to FIG. 5, the IP gateway 100 according to the embodiment of the present invention includes a broadcast signal processor 110 and a management controller 120.

The broadcasting signal processing unit 110 performs a dynamic IP generating function P2 and transmits the digital cable broadcasting signal connected to the coaxial cable network to the network switch 60 by converting the digital cable broadcasting signal received from the broadcasting system 10b into an IP signal.

The management control unit 120 is allocated a unique IP address and performs bidirectional communication with the network switch 60 to operate, control, and control the broadcast signal processing unit 110 among signals transmitted from the transmission system 10b via the IP network. And controls the operation of the broadcast signal processing unit 110 and monitors the operation. Here, the monitoring function of the management control unit 120 can be omitted.

The broadcast signal processing unit 110 includes an RF (Radio Frequency) receiver 111, a broadcast information analyzer 112, an IP address generator 113, a re- (114) and an IP sending unit (115).

The RF receiver 111 receives a RF signal transmitted by a cable broadcasting company through a coaxial cable network, demodulates the received RF signal, and outputs a digital cable broadcasting signal (including a VOD broadcasting signal) .

The broadcast information analyzing unit 112 extracts PSI (Program Specific Information) included in the digital cable broadcast signal received from the RF receiver 111, analyzes the PSI, and stores program configuration information for each broadcast channel And supplies it to the remultiplexer 114. If the dynamic IP address is generated by using the program number of the broadcasting program for each channel included in the broadcasting information PSI, the program number is provided to the IP address generating unit 113. In addition, if the broadcast information analyzing unit 112 generates a dynamic IP address by using a long-form channel number for each channel based on num_channels_in_section in a long-form virtual channel table included in OOB-SI (Out of Band System Information) information Form channel number for each channel from the back-side management control unit 120 and provides the received long-form channel number for each channel to the IP address generation unit 113. [

The broadcast information analyzer 112 receives the set values of the broadcast signal processor 110 and the operation control command from the management controller 120 and controls the respective configurations of the broadcast signal processor 110 and the broadcast signal processor 110, To the management and control unit 120. The operation control unit 120 may be configured to transmit the operation state and the setting values of the control unit 120 to the control unit 120. [

The IP address generating unit 113 stores frequency mapping information and stores a program number or service ID for each channel or long-form channel number information for each channel or a channel-specific program number and a long-form channel number And provides the IP multicasting unit 115 with the destination multicast address for sending the multicast IP address for each channel.

Here, the frequency mapping information is continuously maintained unless the frequency range of at least one of the cable broadcasting channels is changed. When the frequency range of at least one channel is changed, the frequency mapping information is transmitted to the frequency mapping information generating unit 123 of the management controller 120 .

The frequency mapping information may be a table value as shown in Table 1 below as an example.

     channel Frequency range (unit: MHz)       A value      B value 31 264-270 90 101 32 270 to 276 91 102 33 276-282 92 103 34 282-288 93 104 35 288 to 294 94 105 36 284-300 95 106 ... ... ... ... N 678 to 684 254 255

An example of an IP address generation algorithm for generating an IP address in the IP address generation unit 113 will be described in more detail. The destination multicast address, that is, the IP address is represented by, for example, an IPv4 format (ABC D) , B, C, and D have one of the values from 0 to 255. [

The IP address generator 113 recognizes the values of A and B corresponding to each channel through the frequency mapping information, and generates values of C and D using the program number or the long-form channel number.

As an example of a method of using the program number, a value obtained by dividing the program number by 255 is taken as the value of C, and a value obtained by adding "1" to the remaining value obtained by dividing the program number by 255 is taken as the value of D. An example of a method using a long-form channel number is a value obtained by dividing a long-form channel number by 255, a quotient obtained by adding a value of C, a residual value obtained by dividing a long form channel number by 255, Is the value of D.

The method of using both program number and long-form channel number is to add, subtract or multiply each number, divide by 255, and use quotient or remainder value as C value or D value. The method of using both the program number and the long-form channel number can be varied in addition to the above description.

The remultiplexer 114 receives the configuration information for each broadcast channel from the broadcast information analyzer 112 and receives the digital cable broadcast signal from the RF receiver 111 and separates the digital cable broadcast for each broadcast channel and program And transmits the digital cable broadcasting signal separated for each broadcasting channel and program to the IP transmitting unit 115.

The IP transmitting unit 115 receives IP addresses for each channel and each program (i.e., a destination multicast address for each channel) from the IP address generating unit 113, And transmits the digital cable broadcasting signals of the program for each broadcasting channel received from the multiplexing unit 114 to the network switch 60 as an IP signal.

Next, the management control unit 120 will be described in more detail.

The management control unit 120 includes an IP communication unit 121, a data extraction unit 122, a frequency mapping information generation unit 123 and an integrated control unit 124.

The IP communication unit 121 has a unique IP address and is connected to the network switch 60 to communicate with the transmission system 10b of the cable broadcasting station or with the cable broadcasting receiver 30a. The IP communication unit 121 transmits and receives data for control and monitoring of the IP gateway 100 from the transmission system 10b or a remote terminal (not shown) and transmits setting data for the IP gateway 100, firmware, system software And provides it to the integrated control unit 124 or the data extraction unit 122.

The data extracting unit 122 extracts the MPEG-2 Transport Stream from the IP packet received through the IP communication unit 121, extracts MPEG-2 Private Section data from the MPEG-2 Transport Stream, The system software data file, and the setting data file for the IP gateway, and provides the extracted data file to the integrated controller 124. [ The data extracting unit 122 receives the OOB-SI information from the IP packet received through the IP communication unit 121 and extracts configuration information for each channel, transmission frequency, and transport stream ID, Program Number, and Long-Form channel number to the integrated controller 124.

On the other hand, the data extracting unit 122 may have a function of verifying whether the extracted firmware data file, the system software data file, and the IP gateway setting data files are normal or not.

The frequency mapping information generation unit 123 sets the frequency mapping rule P3 if the OOB-SI information received through the IP communication unit 121 includes the frequency mapping rule P3, and sets the frequency mapping rule P3, To generate frequency mapping information P2. The frequency mapping information generating unit 123 provides the frequency mapping information P2 to all the cable broadcasting receivers 30a to newly generate or update the frequency mapping information P2 so that the IP gateway 100 and each cable broadcasting receiver (30a) share the same frequency mapping information (P2).

The integrated control unit 124 performs operation control and status monitoring of the IP gateway 100 and receives configuration data, firmware, system software, and the like for the CCS end-end equipment from the data extraction unit 122. [ The integrated control unit 124 controls the setting values of the broadcast signal processing unit 110 according to the received IP gateway setting data and sets the configuration information and the destination multicast address for each channel of the broadcast signal processing unit 110, And performs firmware change of the broadcast signal processing unit 110 through the received firmware data. Also, the integrated control unit 124 performs the system software change in the management control unit 110 using the received system software data.

Meanwhile, the integrated controller 124 may receive the operation state value from the broadcast signal processor 110 and monitor the operation state, the input state, and the output state of the broadcast signal processor 110.

Hereinafter, a cable broadcasting receiver according to an embodiment of the present invention will be described with reference to FIG. 6 is a block diagram of a cable broadcasting receiver according to an embodiment of the present invention.

6, the cable broadcasting receiver 30a according to the embodiment of the present invention includes a channel change processing unit 31, a VOD processing unit 32, an EPG information storage unit 33, an RF control unit 34, an IP control unit 35, a frequency mapping storage unit 36, an IP receiving module 37, a decoder 38, and an A / V output unit 39.

The channel change processing unit 31 grasps the broadcast channel selected by the user and grasps channel information on the broadcast channel from the EPG information storage unit 33. [ Here, the channel information includes frequency information of a corresponding broadcast channel, a TS (Transport Stream) ID, a program number (service ID), a long-form channel number, and the like.

 The VOD processing unit 32 identifies the VOD selected by the user, transmits the VOD identification information, and transmits frequency setting information of the VOD selected by the user. The frequency setting information is information provided through the IP network in the transmission system 10b at the request of the cable broadcasting receiver 30a and includes frequency information, TS (Transport Stream) ID, program number (service ID), Long -Form Channel number and so on.

 The EPG information storage unit 33 stores EPG (Electronic Program Guide) information for each program.

The RF control unit 34 receives channel information or frequency setting information for a broadcast channel selected by the user from the channel change processing unit 31 and provides the channel control information to the IP control unit 35.

The IP control unit 35 has a function of having a dynamic IP address generation function P1 and requesting and receiving a broadcast channel or VOD selected by the user from the RF control unit 34 through the IP reception module 37 do. The IP control unit 35 receives the frequency mapping information P2 transmitted from the IP gateway module 100 from the IP receiving module 37 and stores the received frequency mapping information P2 in the frequency mapping storage unit 36. [

The IP control unit 35 controls the IP control unit 35 to generate the dynamic IP address of the broadcast channel selected by the user by using the program number included in the frequency setting information for the VOD selected by the user or the VOD selected by the user, At least one is used to generate the C and D values of the IP address. The method of generating the C value and the D value at this time is the same as the operation of the IP address generating unit 113 of the IP gateway 100. [ Then, the IP control unit 35 obtains the A value and the B value of the IP address using the frequency mapping information P2 stored in the frequency mapping storage unit 36, finally generates an IP address, Transmits a request signal used as a multicast IP address to be received (that is, a signal requesting a user-selected broadcast channel or a VOD selected by the user) to the IP network and requests the corresponding broadcast channel or VOD. Here, the multicast IP address to be received is located in the destination address field of the request signal.

The frequency mapping storage unit 36 is managed by the IP control unit 35 and stores frequency mapping information P2. The IP receiving module 37 is responsible for interfacing with the IP network.

The decoder 38 MPEG-decodes the digital broadcast signal or VOD received from the IP control unit 35 to obtain a pure broadcast signal. The A / V output unit 39 can recognize the decoded A / Modulated by the A / V signal and outputted to the outside so that the user can watch the corresponding channel or VOD through the screen.

7 is a flowchart illustrating a CCS-based cable broadcasting service method according to an embodiment of the present invention.

The transmission system 10b of the cable broadcasting company transmits OOB-SI information and EPG information to the IP gateway 100 through the IP network (S701). The IP gateway 100 receives the OOB-SI information or the EPG information through the network switch 60 and extracts the frequency mapping rule P3 included in the OOB-SI information or the EPG information and internally sets it (S702) .

Then, the IP gateway 100 generates frequency mapping information P2 (e.g., a frequency mapping table) in which the A value and the B value are set corresponding to the channel-specific frequency of the cable broadcasting according to the set frequency mapping rule P3 S703).

After generating the frequency mapping information, the IP gateway 100 transmits all the cable broadcasting receivers 30a to the network switch 60 so as to receive the frequency mapping information P2 (S704). All the cable broadcasting receivers 30a receive and register the frequency mapping information P2 (S705). As a result, the IP gateway 100 and all the cable broadcasting receivers 30a share the same frequency mapping information P2.

In this state, the transmission system 10b transmits the digital cable broadcasting signal (including the VOD broadcasting signal) of the RF signal to the IP gateway 100 through the coaxial cable network (S706).

The IP gateway 100 demodulates the RF signal to extract a digital cable broadcast (including a VOD signal), divides the digital cable broadcast into cable broadcasts for each channel, and generates an IP address for the cable broadcast for each channel. That is, the IP gateway 100 obtains the A value and the B value of the IP address through the frequency mapping information (P2) for each channel frequency (S707), and compares the program number identified from the PSI information with the set IP address generation algorithm And generates a C value and a D value (S708).

The IP gateway 100 generates an IP address by using the A value, the B value, the C value, and the D value, which are identified and generated as described above (S709), and transmits an IP signal And transmits it to the network switch 60 (S710).

On the other hand, in the cable broadcasting receiver 30a, after the frequency mapping information P2 is registered, if the user selects one channel or selects one VOD, the frequency for the channel or VOD selected by the user and the channel or VOD selected by the user And obtains the A value and the B value of the IP address by associating the obtained frequency with the frequency mapping information P2 and substitutes the identified program number into the IP address generation algorithm to determine the C value and the D value And generates an IP address corresponding to the channel or VOD requested by the user (S711).

Then, the cable broadcasting receiver 30a transmits a broadcast request signal, which is used as a multicast IP address to which the cable broadcasting receiver 30a should receive, to the network switch (S712) (Multicast IP address) of the IP signal transmitted from the cable broadcasting receiver 30a to the destination address (multicast IP address) of the broadcasting request signal received from the cable broadcasting receiver 30a and transmits the matching IP signal to the cable broadcasting receiver 30a. (S713).

The cable broadcasting receiver 30a receives the IP signal corresponding to the IP address generated by the cable broadcasting receiver 30a, decodes it, and displays it on the screen (S714).

Meanwhile, in the above-described embodiment, the A value and the B value are grasped using the frequency mapping information in the IP addresses of (A, B, C, and D), and at least one of the program number and the long- The C value and the D value are generated to generate the IP address, the present invention is not limited thereto.

That is, according to the embodiment of the present invention, the values to be grasped using the frequency mapping information may be C value, D value, A value, C value, B value and C value, B value and D value, The value generated using at least one of the -Form channel numbers may be the remaining two values excluding the value that is grasped using the frequency mapping information. This is based on the IPv4 address system and can be applied to the case of IPv6.

In the above description, the calculation formula for generating the C value and the D value by using at least one of the program number and the long-form channel number is only an example, and the result is a variety of calculation formulas May be used.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It belongs to the scope.

10: cable broadcaster 20: coaxial cable network
30, 30a: Cable broadcasting receiver 41, 43: PC
42: TV 50: IP network
60: network switch 10a, 10b: transmission system
A: CMTS B: Cable modem
100: IP conversion apparatus, IP gateway 110: Broadcast signal processing section
120: management control unit 111: RF receiving unit
112: broadcast information analyzing unit 113: IP address generating unit
114: re-multiplexing unit 115: IP transmitting unit
121: IP communication unit 122:
123: frequency mapping information generating unit 124:

Claims (9)

A first partial value which makes an IP address through frequency mapping information for each program for each channel classified from the received digital cable broadcasting signal by receiving a digital cable broadcasting signal transmitted from a transmission system of a cable broadcasting company through a coaxial cable network And generates a second partial value constituting an IP address by substituting the number information related to each channel-specific program into the setting calculation expression to generate an IP address for each channel-specific program, and transmits the generated IP address to the destination multicast IP address An IP gateway for transmitting the program for each channel to the IP network, and
Has the same frequency mapping information as that of the IP gateway and has a function of generating an IP address for each channel program in the same manner as the IP gateway and generates and generates an IP address when a user selects a channel program or VOD A cable broadcast receiver for transmitting a broadcast request signal used as a multicast IP address to which the IP address should be received to an IP network and receiving the broadcast information
Lt; / RTI >
The frequency mapping information is information in which the first partial value is recorded corresponding to a frequency for each channel,
Wherein the number information related to each channel-specific program is at least one of a program number and a long-form channel number. delete The method of claim 1,
Wherein the first partial value is two values of the (ABCD) value constituting the IPv4 address system, and the second partial value is the remaining two values of the value of (ABCD). The method of claim 1,
Wherein the first partial value is an A and a B value among (ABCD) values constituting an IPv4 address system, and the second partial value is a C and a D value. 4. The method according to claim 3 or 4,
The IP gateway sets frequency mapping rules, generates the frequency mapping information according to the frequency mapping rule, and provides the generated frequency mapping information to each cable broadcasting receiver to share the CCS-based cable broadcasting service. Registering a received frequency mapping rule by an IP gateway connected to a transmission system of a cable broadcasting station and a coaxial cable network,
Generating, by the IP gateway, frequency mapping information in which a first partial value forming an IP address is registered corresponding to a frequency for each channel according to the frequency mapping rule;
Providing frequency mapping information generated by the IP gateway to each cable broadcasting receiver to share with each other,
The IP gateway assigns the frequency mapping information and the number information related to each channel program to each program for each channel of the digital cable broadcasting signal received through the coaxial cable network to the setting calculation expression to obtain a second partial value Generating an IP address for each channel-specific program,
The IP gateway converts the program for each channel into an IP signal having an IP address as a destination address,
Each cable broadcast receiver generates an IP address corresponding to a program or VOD broadcast of a channel selected by the user in the same manner as the IP gateway when the user selects a program or VOD broadcast of one channel,
Transmitting a broadcast request signal used as a multicast IP address to be received by the cable broadcast receiver to the IP network and receiving corresponding broadcast information
Lt; / RTI >
The frequency mapping information is information in which the first partial value is recorded corresponding to a frequency for each channel,
Wherein the number information associated with each channel-specific program is at least one of a program number and a long-form channel number. delete The method of claim 6,
Wherein the first partial value is two values of the (ABCD) value constituting the IPv4 address system, and the second partial value is the remaining two values of the value of (ABCD). The method of claim 6,
Wherein the first partial value is an A and a B value of an (ABCD) value constituting an IPv4 address system, and the second partial value is a C and a D value.

Images