KR20100084284A - Method for recoding adaptive broadcast data and broadcast receiver - Google Patents

Abstract

PURPOSE: A method for recording adaptive broadcast data and a broadcast receiver are provided to transmit a resource state to a service provider to selectively receive a customized broadcast signal suitable for contents preference of a user. CONSTITUTION: A broadcast receiver receives an available service channel list including available service channel information from a service provider(S820). The broadcast receiver receives a recording object program from the service provider(S840). The broadcast receiver selects a target bit rate by a section based on user recording preference information. The broadcast receiver transcodes the received recording object program by the selected target bit rate(S850).

Description

Method for recoding adaptive broadcast data and broadcast receiver

The present invention relates to a custom broadcast signal recording method and a broadcast receiver, and more particularly, to a custom broadcast signal recording method and a broadcast receiver using an Internet protocol.

1A to 1C show a conventional broadcast reception method.

1A to 1C, conventional TVs transmit content produced by a broadcaster through a radio wave transmission medium such as a cable network, a terrestrial wave, or a satellite broadcast provider, and a viewer transmits the contents. It was serviced by watching through a TV receiver capable of receiving the media.

However, as digital-based digital TV technology has been developed and commercialized in existing analog broadcasting, various contents such as real-time broadcasting, contents on demand, games, news, etc., using the internet network connected to each household in addition to the existing radio media. Can be provided to viewers.

An example of the content providing using the Internet network is IPTV (Internet Protocol TV). The IPTV refers to a service that provides an information service, video content, and broadcasting to a television using a high-speed internet network.

IPTV is the same as general cable broadcasting or satellite broadcasting in that it provides broadcasting contents including video, but it is characterized in that bidirectionality is added. And unlike general public broadcasting, cable broadcasting or satellite broadcasting, viewers can watch programs they want to watch at their convenient time.

The broadcast receiver supports different storage space values according to its performance, and also requires different storage space values depending on the display format. However, there are many cases in which the content provided by the content provider is uniformly received, thereby increasing the amount of service information unnecessarily.

The technical problem to be achieved by the present invention relates to a custom broadcast signal recording method and a broadcast receiver capable of selectively receiving a custom broadcast signal suitable for the user's content preference.

Another technical problem to be achieved by the present invention relates to a method for recording a broadcast signal and a broadcast receiver capable of storing a broadcast signal in accordance with a user's content preference.

Another technical problem to be achieved by the present invention relates to a method and a broadcast receiver for recording a customized broadcast signal capable of selectively receiving a customized broadcast signal suitable for a user's content preference and resources of a broadcast receiver.

According to an aspect of the present invention, there is provided a method of recording a customized broadcast signal, the method comprising: connecting to a service provider through an IP network; Receiving an available service channel list including available service channel information from the service provider; Transmitting recording target program information indicating the recording target program selected from the received available service channel list to the service provider; Receiving a recording target program, selecting a target bit rate for each section based on user recording preference information indicating content preferences of a stored user, and selecting the received recording target program for each of the selected sections. And transcoding and storing the target bit rate. The user recording preference information may include at least one of content production preference information including information related to content creation, content classification preference information including information related to content classification, and content source preference information including information related to a content source. It may include.

Preferably, the user recording preference information may include weight information for comparing mutual priority between information included in the user recording preference information.

Preferably, the user recording preference information may be calculated from at least one of information input by the user and usage type information of the user.

The customized broadcast signal recording method may further include transmitting available resource information, which is available information on a resource of a broadcast receiver, to the service provider, and the available service channel list may be selected based on the available resource information. .

Preferably, the storing may further include segment metadata including segment information of the recording target program and select a target bit rate for each section based on the received segment metadata. .

Preferably, the available service channel list may include segment metadata including segment information of a program.

In the storing step, the target bit rate for each section may be selected based on the remaining storage space information indicating the remaining capacity of the storage space.

According to another aspect of the present invention, there is provided a method of recording a customized broadcast signal, the method comprising: connecting to a service provider through an IP network; Transmitting user recording preference information indicating a user's content preference to the service provider; Transmitting remaining storage space information indicating a remaining capacity of the storage space to the service provider; Transmitting recording target program information indicating a recording target program to the service provider; And receiving and storing the recording target program having a target bit rate for each section selected based on the remaining storage space information and the user recording preference information.

In accordance with another aspect of the present invention, a broadcast receiver includes a network interface unit for transmitting and receiving an IP packet with a service provider through a network; A display unit displaying a list of available service channels received from the service provider; A target bit rate for each section based on the user recording preference information indicating control of the recording target program information indicating the recording target program selected from the available service channel list to be transmitted to the service provider and indicating the content preference of the stored user; an application manager configured to select a bit rate and to control transcoding the program to be recorded at the target bit rate for each section; And a service control manager controlling the reception of the recording target program from the service provider. The user recording preference information may include at least one of content production preference information including information related to content creation, content classification preference information including information related to content classification, and content source preference information including information related to a content source. It may include.

Preferably, the user recording preference information may include weight information for comparing mutual priorities among the information included in the user recording preference information.

Preferably, the application manager may calculate the user recording preference information from at least one of information input by a user and usage type information of the user.

Preferably, the application manager may control to transmit available resource information, which is available information on a resource of a broadcast receiver, to the service provider, and the available service channel list may be selected based on the available resource information.

Preferably, the metadata manager may receive segment metadata including segment information of the recording target program transmitted from the service provider.

Preferably, the application manager may select a target bit rate for each section based on the received segment metadata.

Preferably, the available service channel list may include segment metadata including segment information of a program.

Preferably, the application manager may select the target bit rate for each section based on the remaining storage space information indicating the remaining capacity of the storage space.

In order to solve the above technical problem, the broadcast receiver according to the present invention includes a network interface unit for transmitting and receiving an IP packet with a service provider through a network; A display unit displaying a list of available service channels received from the service provider; User recording preference information indicating the user's content preference, remaining storage space information indicating the remaining capacity of the storage space, and recording target program information indicating the recording target program selected from the available service channel list are transmitted to the service provider. An application manager for controlling; And a service control manager for controlling reception of the recording target program having a target bit rate for each section selected from the service provider based on the remaining storage space information and the user recording preference information. .

The effects of the broadcast receiver and the customized broadcast signal recording method according to the present invention described above are as follows.

First, by transmitting a resource state to a service provider, receiving, outputting, and storing content suitable for the service provider, a customized broadcast signal may be received.

Second, when the storage space is insufficient, the content can be stored accordingly.

Third, appropriate content may be received according to the user's content preference.

Fourth, the content may be stored according to the content preference of the user.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

The terms used in the present invention have been selected as general terms widely used as possible in consideration of the functions in the present invention, but may vary according to the intention or custom of a person skilled in the art or the emergence of a new technology. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, it is intended that the terms used in the present invention should be defined based on the meanings of the terms and the general contents of the present invention rather than the names of the simple terms.

2 is a diagram illustrating a system layer of IPTV (IP Television).

Referring to FIG. 2, the IPTV system includes a content provider, a service provider, a network provider, and a consumer layer.

The content provider serves to provide content to a service provider. The service provider serves to provide a service to subscribers, collects various contents, and modifies a signal according to an IP environment and delivers it to a user. The service provider may be a virtual entity, and the content provider may be a service provider. The network provider serves to connect the user and the service provider through the IP network. The transmission system may use various network networks such as an access network or a backbone network. The user is provided with content and receives a broadcast, and includes a set top box, a PC, or a mobile terminal.

Hereinafter, the concept of IPTV will be described in more detail.

3 is a diagram illustrating a characteristic diagram of an IPTV system.

Referring to FIG. 3, the system layer of the IPTV can be largely classified into a content provider, a service provider, and a user. A content provider is also called a platform provider. These three groups have different roles, and content providers are a group that provides all the services and data for a broadcast program.

In addition, the service provider transmits multimedia data, maintains the transmission network for stable reception of content to the customer, and the infrastructure and functions for network transmission to the content provider. To provide.

Consumer groups play a role in replaying incoming data using infrastructure such as xDSL and cable, and responding to user needs immediately. Most of them are made up of companies that produce IPTV, and the types can be divided into IPTV, IP STB, and IP Phone. Learn more about each group.

First, a content provider group may have a TV station that makes a broadcast program. TV Station refers to existing terrestrial or cable stations, which can create and store programs that users can watch and transmit them digitally. In general, it is to be able to transmit in various broadcast forms.

Radio Station means a general radio station, and although there may be a video channel at any time, it can be said that it operates without a video channel in most cases. Video on Demand (VoD) and Audio on Demand (AoD) services have different characteristics from TV Station or Radio Station. Content providers will also store and store programs for broadcast, but this is a live broadcast with continuity, which can't be rewound or stopped unless recorded. However, in the case of VoD or AoD, I store the broadcasting program, movie, music, etc. that I want and then play it for viewing. For example, if there is a broadcast program that was not properly watched because there is no current time, it is possible to access a site that provides such a broadcast service and download the file or play the file immediately. AoD also offers the ability to record audio programs in real time or make it difficult to record audio programs. Music on Demand (MoD) service can download and listen to the music I want. The service of the Mod can be performed by a record label or a record distributor by expanding an existing web service.

Hereinafter, an embodiment of a service provided by a content provider group will be described.

The PF server can be serviced by a company that manages all broadcasting information and location information provided by a content provider. This service mainly contains broadcasting time or location information necessary for broadcasting and information that a user (Costomer) can access. The customer can obtain this information and display it on the screen. The PF server is one of the services to be provided for each broadcasting station. In the IPTV environment, the PF server can provide the service so that the user can access the broadcasting station.

The EPG service is one of convenient services that allows a user to search a broadcast program by time zone and to grasp by channel. The EPG service is already installed on the customer side and can be executed. The user can obtain only the information on the corresponding broadcasting station from the PF server, but the EPG service can obtain the information on the real time broadcasting channels of all broadcasting stations at once and can be used very conveniently. For example, it has a powerful built-in function to schedule recording of CNN news or to schedule watching a Disney broadcast. Therefore, the EPG service must provide detailed information of the broadcasting program of the corresponding region in each time zone. In particular, in some dramas, the contents of a drama can be searched or divided into categories to distinguish SF, Drama, Animation, etc., and detailed information about the plot or characters of a movie or drama in a simple broadcast program is also included. can do. The big problem of EPG service is that there are many kinds of licenses of customers who watch IPTV, and how to transmit EPG data suitable for users can be a problem. To access the EPG service, Costumer simply finds and presses an input key on the remote.

ECG service has all functions that user can conveniently use contents information of content provider and location and access authority of access server. In short, it is an electronic content guide (EPG) that provides easy access to servers with content and detailed information about the content. In other words, instead of real-time broadcasting, services such as AoD, MoD, and VoD are bundled together like EPG to reduce the burden of users accessing individual content services to download or view content. Similar to the EPG service, this service does not inform the real-time broadcast channel information but is already stored in the server so that it can be watched at any time and downloaded and stored. To access the server with each content, the user will have to obtain a very difficult address or PF server. This is a very complicated process and time consuming. Companies that provide ECG allow ECG programs to be automatically installed on customers, collect information on all contents, and provide data. To access the ECG service, the customer can also click the Enter key button on the remote control.

Portal Server is a web service provided by each broadcasting station. The portal server is connected to a web server of a broadcasting company or a service provider. The role of Portal Server is to search or view the list of programs provided by each broadcaster or content providers that provide content services. It can be thought of as a function like ECG or EPG. However, the Portal service also has features such as user authentication and license agreements, so I need to connect to watch the program I want. In addition, the ECG or EPG provides an integrated broadcast or content list, but the Portal service may provide detailed search by providing broadcast or content list information for a corresponding program provider. To access the Portal service, the customer simply clicks the Portal input button on the remote.

In this way, the content provider side should include functions for providing such services, and in order for these functions to function properly, servers of each service provider may provide IP networks to transmit the program or broadcast information in real time. You must be connected to. In addition, each broadcasting station or service provider must be connected to the service provider's network to be transmitted without delay and error. Therefore, the system can transmit multimedia data using internet real-time protocol such as RTP, RTSP, RSVP and MPLS. It must be equipped. For example, if you are trying to deliver multimedia in real time from the current TV studio, you will need to transcode the MPEG-2 and AC-3 audio specifications to match the format of the IPTV. When passing through the server doing this work, the system is configured to pass through the IP network provided by the service provider by attaching the RTP / UDP protocol containing the time information to match the caption or lipync.

The service provider provides network stability and bandwidth to transmit multimedia data and broadcast data transmitted from a content provider. Service providers may also provide IPTV services using existing cable networks. In this case, equipments of a delivery network need to be changed. In other words, network equipment that can transmit data in real time should be configured, and network should be configured in consideration of bandwidth to customer. These devices need to reduce bandwidth by processing large amounts of multimedia data using Multicast service, which is the basic network service of IPTV. If the bandwidth is not secured, the service provider may transcode multimedia broadcasting data from the optical fiber network configuration or contents provider and transform it into a format such as MPEG-4 or MPEG-7 in an effort to secure the bandwidth. have. The Service Provider has to provide several services for this purpose. It is designed to provide size Network Management System (NMS), Dynamic Host Control Protocol (DHCP) and CDN services.

The NMS service allows the service provider to manage the delivery network and IPTV receivers of the customer, which can be transmitted to each customer. That is, if a problem occurs in the transmission network and the customer cannot receive the broadcast, it must have a means for emergency treatment. NMS is widely used as a standardized means to smoothly control and manage machines in remote transport layers. Using this service, you can see how much traffic is being generated for which broadcasts and where the bandwidth is growing. In addition, the content providers should be provided to the content providers to create and manage groups in the multicast. Sometimes you need to be able to create more Multicast groups.

DHCP service is used to automatically assign IP to customer's IPTV receiver and to inform the address of CDN server. DHCP services are also a good way to assign IP to PCs in the general network. The IPTV receiver should be sent an address that allows access to the licensed IPTV receiver so that the user can register during the initial connection. In general, IPv4 will be provided by IPTV receivers, but IPv6 is also available. Thus, IPTV receivers that provide IPv4 do not mean they cannot be used.

CDN service is data provided by the Service Provider. When the IPTV receiver is powered on and operated for the first time, the CDN information is received from the Service Provider while receiving IP by the DHCP service. This information contains the registration or authentication of the user of the IPTV provider and the aforementioned PF information. The IPTV receiver may receive the IP broadcast signal by obtaining CDN information from the service provider.

A customer can have several types of IPTV receivers. If you have a regular TV, you can enjoy IPTV by renting an IPTV STB at a low price. A service provider can pay additional service costs at a low price and apply for an IP phone. IPTV receiver basically has a network interface that can connect to the network, and has an internet protocol so it can receive and process data packets from the network and play them back on the screen in the case of multimedia data. It needs to be sent quickly over the network, get that information from the server, and respond. That is, the IPTV receiver may operate to transmit the user's requirements in both directions while processing the multimedia data. You can also provide buttons for IPTV on the remote control to use the service well. In the provided IPTV receiver, the user can save and view the wonderful scenes in the drama and enjoy additional services such as location information and hotel reservation.

On the other hand, the NMS mentioned above helps the service provider to control and manage not only the network management but also the user's IPTV receiver. When the number of IPTV receivers increases and additional services increase, the NMS 'S role becomes even more important. For this reason, the SNMP protocol is mandatory for IPTV broadcast receivers. This is intended to enable Service Provider to manage and control IPTV broadcast receivers. IPTV broadcast receivers can then learn in detail the statistics of the protocol they are currently communicating with, information about the processor they are using, and what TV manufacturer they are using.

4 is a diagram illustrating a system between a service provider and a broadcast receiver.

Referring to FIG. 4, the service provider and the terminal may perform bidirectional communication through an IP network. That is, according to the system, the broadcast receiver may receive a broadcast from the service provider, and the broadcast receiver may transmit information about the environment of the broadcast receiver to the service provider.

In this case, when the service provider collects a broadcast signal and provides the broadcast signal to the broadcast receiver, the broadcast stream may include a single or multi program. In this case, IP encapsulation is required when a transport stream is to be transmitted through an IP network.

5 is a diagram illustrating an embodiment of IP encapsulation when a service provider provides a service to a broadcast receiver through an IP network.

Referring to FIG. 5, an IP capsule may be composed of an IP header, a UDP header, an RTP header, and actual data, that is, a transport stream packet.

6 is a diagram showing a first embodiment of a method for recording customized broadcast signal according to the present invention.

Referring to FIG. 6, the broadcast receiver starts an IP network connection and a service session (S600). Through an IP network, a broadcast receiver is connected to a service provider and a session is opened. Here, the broadcast receiver may first open a session by first connecting to a service provider designated as a default. In the case of subscribing to multiple service providers, the broadcast receiver may select the connected service provider.

The broadcast receiver transmits the user recording preference information and the remaining storage space information to the service provider (S610). The user recording preference information is information indicating content preference of the user and may be used to select a target bit rate for each section of a recording target program. The remaining storage space information is information indicating the remaining capacity of the storage space of the broadcast receiver. That is, the remaining storage space information may mean information on the storage capacity of the total storage capacity of the broadcast receiver minus the storage capacity in use, and information on the storage capacity that the broadcast receiver can store the service received from the service provider. You may. The remaining storage space information may indicate the remaining space of the storage device of the broadcast receiver in a predetermined unit and may be used to select an appropriate size of a recording target program.

The broadcast receiver selects a recording target program and transmits recording target program information indicating a selected recording target program to a service provider (S620).

The service provider selects a target bit rate for each section based on the user recording preference information transmitted from the broadcast receiver (S630). The service provider may provide an adaptive bit rate for the entire program and apply the adaptive bit rate to each section of the program. The service provider may select whether to provide an adaptive bit rate for the entire program or to provide an adaptive bit rate for each section constituting the program, and make the selection based on the remaining spatial information. That is, if the remaining storage space of the broadcast receiver is not enough, the service provider may choose to apply the adaptive bit rate for each section constituting the program.

When the service provider applies the adaptive bit rate to the entire program, the adaptive bit rate may be applied depending on whether the broadcast receiver can store the recording target program based on the remaining storage space information. For example, if the remaining storage space of the broadcast receiver is sufficient, the service provider selects a high target bit rate; otherwise, the service provider selects a low target bit rate.

In addition, when the service provider applies the adaptive bit rate to the entire program, the adaptive bit rate may be applied according to the user recording preference information. For example, if the program is a program having a high preference set on the user recording preference information, a high target bit rate is selected; otherwise, a low target bit rate is selected.

In addition, when the service provider applies the adaptive bit rate to the entire program, the adaptive bit rate may be applied according to the user recording preference information and the remaining storage space information. For example, if the program is a program having a high preference set on the user recording preference information and the remaining storage space of the broadcast receiver is sufficient, select a high target bit rate within the remaining storage space range, otherwise, a low target. Select the bit rate.

In the case where the target bit rate is differently applied to the same program in a certain time unit, the service provider adaptively applies the target bit rate in interval units of the program by using user recording preference information. For example, a target bit rate for a section including a content having high preference set on user recording preference information is set high, and a target bit rate for a section not set is set low.

The service provider broadcasts a recording target program having a target bit rate for each section (S640). The service provider provides a broadcast receiver with a recording target program coded at a target bit rate for each section. The broadcast receiver may receive and store a recording target program broadcast by the service provider.

FIG. 7 is a diagram illustrating a preferred embodiment of a process between a service provider and a broadcast receiver in the first embodiment of a method for recording a customized broadcast signal according to the present invention.

Referring to FIG. 7, a service provider provides a broadcast service (1), and a broadcast receiver is powered on (1). When the broadcast receiver is powered on, system initialization is performed (2).

The broadcast receiver initialized by the system searches for connectable service providers (3). Here, the broadcast receiver connects to a service provider set as a default, or when there are a plurality of connectable service providers, the broadcast receiver requests a user's selection, and the user may select it.

While requesting service connection to the service provider, the broadcast receiver transmits authentication information of the broadcast receiver (3-1). The service provider receives authentication information of the transmitted broadcast receiver and performs an authentication procedure for the broadcast receiver (4).

If the qualification of the broadcast receiver is authenticated, the service provider transmits a service connection notification (4-1). Here, the service provider sends available information on the subscription service as a service connection notification. Available information on the subscription service means information on available services of a receivable physical channel.

The broadcast receiver transmits user recording preference information (4-2).

The broadcast receiver performs service discovery (5). In this case, the service discovery searches for a service and determines a service characteristic. The service discovery may acquire information for receiving the service from the service provider through the service discovery. The broadcast receiver displays a service menu (6) to show the user the available services on the subscription service.

The broadcast receiver transmits its available resource information to the service provider (6-1). Here, the available resource information may include at least one of resolution information, audio codec information, video codec information, network information, user level information, and remaining storage space information.

The broadcast receiver receives a service to be recorded from the user (7). Here, the user may select a recording target program, which is a program to record, using the displayed service menu.

Receiving the transmitted available resource information, the service provider compares the available resource information with the various versions of the content (8). The service provider may identify available services that can be output from the broadcast receiver through the comparison procedure.

The broadcast receiver transmits recording target program information indicating the selected recording target program (8-1).

The service provider selects a target bit rate for each section based on the remaining spatial information and user recording preference information, and configures content of a program for recording according to the selected target bit rate for each section (9). In this case, the service provider may provide an adaptive bit rate for the entire program or may provide an adaptive bit rate service in units of intervals. Specifically, the target bit rate may be differently applied to the same program in a predetermined time unit, and in this case, the target bit rate may be adaptively applied in interval units by referring to user recording preference information transmitted from the broadcast receiver. .

For example, in the case of a flexible program, the user recording preference information is transmitted at a high bit rate for a section in which a specific singer indicating a high preference and a low bit rate for the rest of the program. It is possible to provide an adaptive bit-rate service in interval units by transmitting. Here, the total bit rate for the program can be adjusted according to the remaining storage space capacity of the broadcast receiver.

Equation 1 below is for calculating a target bit rate.

Target bit rate = (Hbit * L1 / Len) + (Lbit * L2 / Len)

Where Hbit is the bit rate of the high definition section, Lbit is the bit rate of the low definition section, L1 is the length of time in the high definition section, in seconds, L2 is the length of time in the low definition section, in seconds, and Len = total length of time for the program in seconds. to be.

The service provider broadcasts a recording target program having a target bit rate for each section (9-1).

The broadcast receiver records the broadcasted program to be recorded (10).

8 is a view of a second embodiment of a method for recording customized broadcast signal according to the present invention.

Referring to FIG. 8, the broadcast receiver starts an IP network connection and a service session (S800). Through an IP network, a broadcast receiver is connected to a service provider and a session is opened. Here, the broadcast receiver may first open a session by first connecting to a service provider designated as a default. In the case of subscribing to multiple service providers, the broadcast receiver may select the connected service provider.

The broadcast receiver transmits available resource information at the receiver to the service provider (S810). Here, the available resource information may include at least one of resolution information, audio codec information, video codec information, network information, user level information, and remaining storage space information.

The broadcast receiver receives an available service channel list including available service channel information from the service provider (S820). Here, the available service channel list is selected based on available resource information and includes available service channel information that can be output from the broadcast receiver. In addition, the available service channel list may include segment metadata including segment information of a program. Metadata refers to data about content, a segment refers to a continuous section unit that is a program, and segment metadata refers to data about a segment.

The broadcast receiver selects a recording target program and transmits recording target program information indicating a selected recording target program to a service provider (S830). Here, the broadcast receiver may display a list of available service channels, and the user may select a recording target program from the displayed list of available service channels.

The broadcast receiver receives a recording target program from a service provider (S840). Here, the broadcast receiver may receive segment metadata including segment information of a recording target program.

The broadcast receiver selects the target bit rate for each section based on the user recording preference information, and transcodes and stores the received recording target program at the selected target bit rate for each section (S850). The broadcast receiver may select the target bitrate for each section by comparing user recording preference information and segment metadata. For example, in the case where the recording preference for the movie actor "Julia Roberts" is set high on the user recording preference information, the segment metadata "Julia Roberts" appeared in the segment metadata, the "Julia Roberts" appeared in the segment The content can be stored in accordance with the remaining storage space of the broadcast receiver by adjusting the size of the entire content by applying a high target bit rate for the segment and a low target bit rate for the segment without "Julia Roberts".

FIG. 9 is a diagram illustrating a preferred embodiment of a process between a service provider and a broadcast receiver in a second embodiment of a method for recording a customized broadcast signal according to the present invention.

9, a service provider provides a broadcast service (1), and a broadcast receiver is powered on (1). When the broadcast receiver is powered on, system initialization is performed (2).

The broadcast receiver initialized by the system searches for connectable service providers (3). Here, the broadcast receiver connects to a service provider set as a default, or when there are a plurality of connectable service providers, the broadcast receiver requests a user's selection, and the user may select it.

While requesting service connection to the service provider, the broadcast receiver transmits authentication information of the broadcast receiver (3-1). The service provider receives authentication information of the transmitted broadcast receiver and performs an authentication procedure for the broadcast receiver (4).

If the qualification of the broadcast receiver is authenticated, the service provider transmits a service connection notification (4-1). Here, the service provider sends available information on the subscription service as a service connection notification. Available information on the subscription service means information on available services of a receivable physical channel.

The broadcast receiver performs service discovery (5). In this case, the service discovery searches for a service and determines a service characteristic. The service discovery may acquire information for receiving the service from the service provider through the service discovery. The broadcast receiver displays a service menu (6) to show the user the available services on the subscription service.

The broadcast receiver transmits its available resource information to the service provider (7). Here, the available resource information may include at least one of resolution information, audio codec information, video codec information, network information, user level information, and remaining storage space information.

The service provider receives the available resource information and compares various versions of the content with the remaining storage space information included in the available resource information (8). As a result of the comparison, a list of available service channels that can be output from the receiver is transmitted to the receiver (8-1). That is, it sends available information on the receiver specification. Here, the service provider may selectively transmit segment metadata of the program by adding it.

The broadcast receiver receives the available service channel list and displays the received available service channel list (9).

The broadcast receiver receives a service to be recorded from the user (10). Here, the user may select a recording target program, which is a program to be recorded, from the displayed available service channel list.

The broadcast receiver transmits recording target program information indicating the selected recording target program (10-1).

The service provider receives the recording target program information, and loads the recording target program indicated by the received recording target program information (11). The service provider broadcasts the recording target program (11-1). In this case, the service provider may selectively provide segment metadata including segment information of a recording target program.

The broadcast receiver receives and stores a recording target program from a service provider (12). Here, the broadcast receiver may select a target bit rate for each section based on the user recording preference information, and transcode and store the received recording target program at the selected target bit rate for each section. The broadcast receiver may select the target bitrate for each section by comparing user recording preference information and segment metadata.

FIG. 10 illustrates an embodiment of a data structure for transmitting resource information of a broadcast receiver from a broadcast receiver to a service provider.

Referring to FIG. 10, communication packets are packets for transmitting resource information of a broadcast receiver from a broadcast receiver to a service provider, and include a command field, a resolution information field, an audio CODEC information field, a video CODEC information field, and a network information field. It includes a User Level information field and a Capacity information field. The Command field includes request information, the Resolution information field includes resolution information, and the Audio CODEC information field includes audio codec information. In addition, the Video CODEC information field includes video codec information, the Network Information field includes network information, and the User Level information field includes user level information. The Capacity information field includes remaining storage space information.

Here, the remaining storage space information may be a representation of the remaining space of the storage device of the broadcast receiver in a predetermined unit, and the remaining storage space information may be transmitted only when there is a remaining space of a predetermined value or less.

Since the broadcast receiver does not always send the remaining storage space information to the service provider, the broadcast receiver may include an indicator field indicating whether valid information is stored in the capacity information field. For example, when the bit of the indicator field is '1', it may be promised to transmit the remaining storage space information.

8 and 9, the service provider may include the size of a program provided to each service in the capacity information field and include the same in a list of available service channels to transmit. If the program has been produced in advance, the size of the program transmits the measured information. If the program is a real-time broadcast, the predicted information is transmitted using the target bit rate and the program length. 6 and 7, the capacity information may be provided from the broadcast receiver to the service provider and may be provided from the service provider to the broadcast receiver.

11 is a diagram illustrating an embodiment of a data structure for transmitting remaining storage space information of a broadcast receiver from a broadcast receiver to a service provider according to the present invention.

Referring to FIG. 11, the STR data structure is a data structure for delivering residual storage space information. For this purpose, the STR data structure may include an indicator field, a scale_value field, and a remaining_space_value field. In this case, the indicator field is a field for signaling to transmit remaining space information. When the indicator field is set to 1, when the receiver starts recording or when push VOD service starts, the residual space shortage threshold determined by the receiver itself is determined. when the storage space is below the threshold. The scale_value field and the remining_space_value field are fields for indicating the remaining storage space capacity. The remaining storage space capacity or program size Program_size_in_bytes may be calculated from Equation 2 below.

Program_size_in_bytes = remaining_space_value * scale

Here, the scale may be calculated from Equation 3 below.

Scale = 10 ^ scale_value * 1Mbytes

According to Equations 2 and 3, when scale_value is 0, the maximum value of Program_size_in_bytes that STR_Structure can represent is 8 Gbyets, and when scale_value is 1, the maximum value of Program_size_in_bytes that STR_Structure can express is 80 Gbyets. Also, when scale_value is 2, the maximum value of Program_size_in_bytes that can be expressed by STR_Structure is 800 Gbyets, and when the scale_value is 3, the maximum value of Program_size_in_bytes that can be expressed by STR_Structure is 8Tbyets.

12 illustrates another embodiment of a data structure for transmitting remaining storage space information of a broadcast receiver from a broadcast receiver to a service provider according to the present invention.

Referring to FIG. 12, the STR data structure may include an indicator field and a text field. In this case, the indicator field is a signaling field for transmitting remaining storage information. When the indicator field is set to 1, when the receiver starts recording or when the push VOD service is started, the receiver determines the remaining free space. For example, when storage space remains below the threshold. And the text field is a field indicating the remaining storage space capacity. The text field may display 4G in text format when the remaining storage space is 4Gbytets.

FIG. 13 is a diagram illustrating a schema for a user description type according to the present invention, and FIG. 14 is a diagram illustrating a schema for a user preference type according to the present invention.

Referring to FIGS. 13 and 14, the UserDescription element may include a UserPreferences element and a UsageHistory element. The UserPreferences element is a child element and includes a UserIdentifier element, a FilteringAndSearch element, a BrowsingPreferences element, and a RecordingPreferences element. Here, the UserIdentifier element includes identification information for identifying information of a specific user, the FilteringAndSearch element includes preference information for searching and filtering, and the BrowsingPreferences element includes information about a preference when browsing. The RecordingPreferences element includes user recording preference information.

15 is a diagram illustrating a schema for a recording preference type according to the present invention.

Referring to FIG. 15, the RecordingPreferences element includes an id attribute, a timeBase attribute, a timeUnit attribute, a protected attribute, and a preferenceValue attribute. The id attribute contains identifying information to identify the element, the timeBase attribute contains information for selecting one of the Time data type or TimePoint type in the current description, and the timeUnit attribute is named time unit. It includes information about the duration of the small time interval. The protected attribute contains information indicating whether or not the user wants to keep the information private, and the preferenceValue attribute contains weight information.

The RecordingPreferences element also includes a CreationPreferences element, a ClassificationPreferences element, a SourcePreferences element, and a PreferenceCondition element. The CreationPreferences element includes content creation preference information, which is information related to content creation. The ClassificationPreferences element includes content classification preference information, which is information related to content classification. The SourcePreference element includes content source preference information that is information related to a content source.

The PreferenceCondition element includes weight information for comparing mutual priorities among the information included in the RecordingPreferences elements. For this purpose, the PreferenceCondition element includes a Place element and a Time element. The Place element includes weight information according to a place, and the Time attribute includes weight information according to time.

In the case of a TV watched by the whole family, the RecordingPreferences element can be managed by an IPTV receiver, a separate terminal, and a metadata server as many as tens of families or the number of member groups having similar tendencies. When a plurality of RecordingPreferences elements are managed by an IPTV receiver or a separate terminal, a RecordingPreferences element requested from a user among a plurality of RecordingPreferences elements may be transmitted to the metadata server. In addition, when the metadata server manages a plurality of RecordingPreferences elements, the metadata server may receive information for selecting a RecordingPreferences element requested from a user from the plurality of RecordingPreferences elements from the IPTV receiver.

16 is a diagram illustrating a schema for a creation preference type according to the present invention.

Referring to FIG. 16, the CreationPreferences element includes content creation preference information. For this purpose, the CreationPreferences element contains an id attribute, a timeBase attribute, a timeUnit attribute, a preferenceValue attribute, a Title element, a Creator element, a Keyword element, a Location element, a DatePeriod element, and a Tool element. The id attribute contains identifying information to identify the element, the timeBase attribute contains information for selecting one of the Time data type or TimePoint type in the current description, and the timeUnit attribute is named time unit. Contains information about the duration of the small time interval. The preferenceValue attribute includes weight information, and the weight information is used to compare mutual priorities between content production preference information, content classification preference information, and content source preference information.

The Title element includes content title information, the Creator element includes creator information, and the Keyword element includes keyword information. The Location element contains the production location information, the DatePeriod element contains the production period information, and the Tool element includes the production tool related information.

FIG. 17 is a diagram illustrating a schema for a Classication Preferences type according to the present invention.

Referring to FIG. 17, the ClassificationPreferences element includes content classification preference information. For this purpose, the ClassificationPreferences element contains an id attribute, a timeBase attribute, a timeUnit attribute, a preferenceValue attribute, a country element, a DatePeriod element, a LanguageFormat element, a Language element, a CaptionLanguage element, a Form element, a Genre element, a Subject element, a Review element, and a ParentalGuidance element. The id attribute contains identifying information to identify the element, the timeBase attribute contains information for selecting one of the Time data type or TimePoint type in the current description, and the timeUnit attribute is named time unit. Contains information about the duration of the small time interval. The preferenceValue attribute includes weight information, and the weight information is used to compare mutual priority between content production preference information, content classification preference information, and content source preference information.

The Country element contains the country information where the content is produced, the DatePeriod element contains the production period information, and the LanguageFormat element contains information about the language format. The Language element includes information about a language, the CaptionLanguage element includes information about a caption, and the Form element includes information about a content form. In addition, the Genre element includes content genre information, the Subject element includes information about the content subject, the Review element includes review information about the content, and the ParentalGuidance element includes parental guidance classification information.

FIG. 18 is a diagram illustrating a schema for a source preference type according to the present invention.

Referring to FIG. 18, the SourcePreferences element includes content source preference information. For this purpose, the SourcePreferences element contains the id attribute, timeBase attribute, timeUnit attribute, noRepeat attribute, noEncryption attribute, noPayPerUse attribute, preferenceValue attribute, DisseminationFormat element, DisseminationSource element, DisseminationLocation element, DisseminationDate element, and Disseminator element. The id attribute contains identifying information to identify the element, the timeBase attribute contains information for selecting one of the Time data type or TimePoint type in the current description, and the timeUnit attribute is named time unit. Contains information about the duration of small time intervals.

The noRepeat attribute contains information indicating non-repeatability, the noEncryption attribute contains information indicating non-encryption, and the noPayPerUse attribute contains information indicating that it does not accept a per-use fee. The preferenceValue attribute includes weight information, and the weight information is used to compare mutual priority between content production preference information, content classification preference information, and content source preference information.

The DisseminationFormat element includes content distribution format information. For this purpose, the DiseeminationFormat element includes a name attribute including content distribution format name information and a definition attribute including information about a definition of a content distribution format name. The DisseminationSource element contains content distribution source information, and the DisseminationLocation element includes distribution location information. The DisseminationDate element includes content distribution date information, the Disseminator element includes content distributor information, and the MediaFormat element includes media format information. Here, the media format may be HD or SD, for example.

FIG. 19 is a diagram illustrating a schema for a segment information table according to the present invention.

Referring to FIG. 19, a SegmentInfomationTable record includes segment information of content. In other words, the SegmentInformationTable record contains segment metadata. For this purpose, the SegmentInfomationTable record includes a SegmentList element and a SegmentGroupList. The SegmentList element includes information about a list of segments, and for this purpose, includes a SegmentInformation element.

20 is a diagram illustrating a schema for a segment group information type according to the present invention.

Referring to FIG. 20, the SegmentGroupList element includes information about a segment group list. For this purpose, the SegmentGroupList element contains the groupId attribute, the ordered attribute, the numberOfSegments attribute, the numberOfKeyFrames attribute, the duration attribute, the topLevel attribute, the fragmentIdentification attribute, the matadataOriginIDRef attribute, the xml: lang element, the RrogramRef element, the GroupBaseReference element, the GroupBaseReference element. It contains a Segments element, a Groups element, and a KeyFrameLocator element.

The groupId attribute contains ID information for identifying a segment group. The ordered attribute contains information indicating whether the segment group contains an ordered playback list. The numberOfSegments attribute contains information about the number of segments in a segment group. The numberOfKeyFrames attribute contains information about the number of key segments in a segment group. The duration attribute contains information on the sum of the durations of the segments included in the group. The topLevel attribute contains information indicating whether the segment group is a top level group.

The fragmentIdentification attribute includes identification information for identifying a fragment of a date to which a SegmentGroupList element belongs. For this purpose, the fragmentIdentification attribute includes a fragmentId attribute, a fragmentVersion attribute, and a fragmentExpirationDate attribute. The fragmentId attribute includes identification information for identifying a fragment, the fragmentVersion attribute includes version information of the fragment, and the fragmentExpirationDate attribute includes information about an expiration date of the fragment.

The matadataOriginIDRef attribute contains reference information about an instance of MetadateOriginationInformation that contains information about the metadata provider. The xml: lang attribute contains the default natural language information of the description.

 The RrogramRef element contains reference information about the program to which the segment group belongs, including the crid attribute. The crid attribute contains the program's CRID. Here, the CRID may be used as an identifier for uniquely identifying the content.

The TimeBaseReference element contains information that, when played, indicates the use of a particular time base for a segment in the group.

The GroupType element contains type information of a segment group.

The Description element contains detailed descriptive information about the content of the segment group.

The GroupInterval element contains reference information for a single segment that defines a temporary range of segment groups.

The Segments element includes reference list information on the identification value of the SegmentInformation element. For this purpose, the Segments element includes a refList attribute including reference list information on the identification value of the SegmentInformation element. The segments constituting the segment group are defined by reference list information included in the refList attribute. In this case, the actual segment information is transmitted through the SegmentList element.

The Groups element includes reference list information on the identification value of the SegmentGroupInformation element. For this purpose, the Groups element includes a refList attribute including reference list information on the identification value of the SegmentGroupInformation element. A segment group, which is a subgroup of a segment group, is defined by reference list information included in the refList attribute.

The KeyFrameLocator element contains information indicating the position of a key frame of a group of segments in a program in a period of time point.

FIG. 21 is a diagram illustrating code in XML for Groups Type according to the present invention. FIG.

Referring to FIG. 21, a GroupType element is defined as a string type and includes 'highlights', 'highlights / objects', 'highlights / events', 'bookmarks', 'bookmarks / objects', 'bookmarks / events', at least one of 'themeGroup', 'preview', 'preview / title', 'preview / slideshow', 'tableOfContents', 'synopsis', 'shots', 'insertionPoints', 'alternativeGroups', 'other' and 'adaptiveRecordingGuide' It may include.

The target bit rate for each section may be selected using the type information of the segment group included in the GroupType element. For example, by using the information of the segment group whose segment group type is "tableOfContents", the target bit rate is lowered for some segments, or when the segment group is "highlights", the target bit rate is high for the segment belonging to the segment group. The target bit rate for each household can be selected. As another example, the target bit rate for each section may be selected using an "adaptiveRecordingGuide" included in the GroupType element.

22 is a diagram illustrating a schema for a segment information type according to the present invention.

Referring to FIG. 22, the SegmentInformation element includes a segmentId attribute, a fragmentIdentification attribute, a metadataOriginIDRef attribute, an xml: lang attribute, a ProgramRef element, a TimeBaseReference element, a Description element, a SegmentLocator element, and a KeyFrameLocator element.

The segmentId attribute includes identification value information for identifying a segment.

The fragmetIdentification attribute contains the fragmentId attribute, the fragmentVersion attribute, and the fragmentExpirationDate attribute, the fragmentId attribute contains identification information to identify the fragment, the fragmentVersion attribute contains the fragment's version information, and the fragmentExpirationDate attribute contains the segment's version information. Contains expiration date information.

The matadataOriginIDRef attribute contains reference information about an instance of MetadateOriginationInformation that contains information about the metadata provider. The xml: lang attribute contains the default natural language information of the description.

 The RrogramRef element contains reference information about the program to which the segment belongs, including the crid attribute. The crid attribute contains the program's CRID. Here, the CRID may be used as an identifier for uniquely identifying the content.

The TimeBaseReference element contains information indicating the use of a special time base for the segment when played.

The Description element contains detailed descriptive information about the content of the segment.

The SegmentLocator element contains location information of a segment on a program. For this purpose, the SegmentLocator includes a MediaRelTimePoint element, a MediaRelIncrTime Point element, a MediaDuraton element, and a MediaIncrDuration element. The MediaRelTimePoint element contains information to signal relative time points using the Gregorian date and time, and the MediaRelIncrTimePoint element contains information to signal relative time points on a set of mediaTimeUnits set by the user. The MediaDuraton element contains information for signaling duration using dates, hours, minutes and seconds, and the MediaIncrDuration element contains information for signaling durations using declared mediaTimeUnits.

The KeyFrameLocator element contains information indicating the position of a key frame of a segment in a program in a period of time point.

FIG. 23 is a diagram illustrating a schema for a BasicSegmentDescription Type according to the present invention.

Referring to FIG. 23, the BasicSegmentDecscription element includes detailed description information about the content of a segment. The BasicSegmentDecscription element is an element corresponding to the Description element, which is a sub element of the SegmentInformation element, and the Description element may be defined as a segment description type.

The BasicSegmentDescription element includes a Title element, Synopsis element, Genre element, Keyword element, RelatedMaterial element, CreditsList element, Location element, Review element, and ParentalGuidance element. The Title element contains title information, the Synopsis element contains synopsis information, and the Genre element contains genre information. The Keyword element includes keyword information about the content description, the RelatedMaterial element includes material information associated with the content content, and the CreditsList element includes cast information. The cast information here includes information about production-related people such as directors and writers.

The Location element contains shooting location information. For this purpose, the Location element includes the id attribute, timeBase attribute, timeUnit attribute, xml: lang attribute, Name element, NameTerm element, Role element, Region element, AdministrativeUnit element, PostalAddress element, InternalCoordinates element. The id attribute contains identifying information to identify the element, the timeBase attribute contains information for selecting one of the Time data type or TimePoint type in the current description, and the timeUnit attribute is named time unit. Contains information about the duration of the small time interval. The xml: lang attribute contains default natural language information for describing shooting location information. The Name element contains the name of the shooting location, the NameTerm element contains the name of the shooting location using the name in the classification scheme, and the Role element includes information indicating the role of the shooting location. Here, the role of the shooting location may be one of "real location" "fictional setting" and "shootinglocation".

The Region element contains information indicating the region of the shooting location specified using the ISO 3166-2 region code, the AdministrativeUnit element contains the name information of the administrative area to which the shooting location belongs, and the PostalAddress element contains the distance and the location of the shooting location. It includes postal address information including the address or name, and the InternalCoordinates element includes internal coordinates information of a photographing location within a specific postal address.

The Review element contains review information, for which the Review element includes a Rating element and a Reviewer element. The Rating element includes a RatingValue element containing rating information used in the review and a RatingScheme element containing name information of the rating method used to obtain the rating. The Reviewer element contains information about the reviewers who reviewed the content.

ParentalGuidance element includes parental guidance classification information. For this purpose, a ParentalRating element, a MinimumAge element, and a Region element are included. The ParentalRating element includes information indicating a grade according to a grading method, the MinimumAge element includes minimum recommended age information, and the Region element includes country or region information in which parental guide classification information is specified.

By comparing the detailed description information about the content of the segment included in the BasicSegmentDecscription element and the user recording preference information, the segment including the user's favorite content and the segment including the user's non-preferable content can be distinguished. For example, when a user prefers a scene in which a specific actor appears, a segment including a scene in which the specific actor appears may be found through information included in the CreditsList.

In addition, the target bit rate for the segment including the content that the user prefers may be set high, and the target bit rate for the segment including the content that the user does not like.

24 is a block diagram showing the configuration of a preferred embodiment of a digital broadcast receiver according to the present invention.

Referring to FIG. 24, the IPTV receiver 2400 may include a separate tuner to receive terrestrial broadcasting, cable broadcasting, satellite broadcasting, and the like. However, in the present invention, for the convenience of description, the description will be made mainly on the part of processing the content transmitted using the Internet network.

The IPTV receiver 2400 includes a network interface unit 2402, a TCP / IP manager 2404, a service delivery manager 2406, a personal video recorder (PVR) manager 2408, a demultiplexer 2410, a data decoder 2412, The decoder 2414, the display unit 2418, the application manager 2420, the service information database unit 2424, the service discovery manager 2426, the service control manager 2428, the metadata manager 2430, and the content database unit ( 2432).

The network interface unit 2402 receives the packets received from the network, and transmits the packets to the network. That is, the network interface unit 2402 receives a packet including SD & S records, BCG metadata, and broadcast content from a service provider through a network. The network interface unit 2402 transmits a packet including available resource information and user recording preference information.

The TCP / IP manager 2404 is involved in packet transmission from the source to the destination for the packet received by the IPTV receiver 2400 and the packet transmitted by the IPTV receiver 2400. The TCP / IP manager 2404 classifies the received packet to correspond to an appropriate protocol, and classifies the received packet into a service delivery manager 2406, a service discovery manager 2426, a service control manager 2428, and a metadata manager 2430. Output the printed packet. For example, when receiving the SD & S record, the TCP / IP manager 2404 may output the received SD & S record to the service discovery manager 2426. In addition, when receiving the BCG metadata, the TCP / IP manager 2404 may output the received BCG metadata to the metadata manager 2430.

The service delivery manager 2406 is responsible for controlling the received service data. For example, when controlling real-time streaming data, RTP / RTCP (Real-Time Transport Protocol / RTP Control Protocol) may be used. When transmitting the real-time streaming data using the RTP, the service delivery manager 2406 parses the received data packet according to the RTP and transmits it to the PVR manager 2408 or the control of the service manager 2422. In the content database unit 2432. Then, the RTCP is used to feed back the network reception information to a server that provides a service. In addition, the service delivery manager 2406 may transcode the received recording target program at a target bit rate selected by the service manager 2422 to the PVR manager 2408 under the control of the service manager 2422.

The PVR manager 2408 receives service data from the service delivery manager 2406 and records it in the content database unit 2432. Here, the PVR manager 2408 may transcode the received recording target program according to the control of the service manager 2422 at a target bit rate for each section selected by the service manager 2422 and store it in the content database unit 2432.

The demultiplexer 2410 demultiplexes the received packet into audio, video, PSI (Program Specific Information) data, and the like, and transmits the demultiplexer 2410 to the decoder 2414 and the data decoder 2412, respectively.

The data decoder 2414 decodes service information such as program specific information (PSI). That is, the data decoder 2414 receives and decodes a demultiplexed PSI section, a program and service information protocol (PSIP) section, a service information (DVB-SI) section, and the like from the demultiplexer 2410.

In addition, the data decoder 2412 decodes the received sections to create a database of service information, and stores the database of the service information in the service information database unit 2424.

The decoder 2414 decodes the video data and the audio data received by the demultiplexer 2410. The decoder 2414 includes an audio decoder 2415 and a video decoder 2416 for this purpose. The audio data decoded by the audio decoder 2415 is provided to the user through a speaker (not shown), and the video data decoded by the video decoder 2416 is provided to the user through the display unit 2418.

The application manager 2420 manages the overall state of the IPTV receiver 2400, provides a user interface, and manages other managers. To this end, the application manager 2420 includes a user interface manager 2421 and a service manager 2422.

The user interface manager 2421 provides a graphical user interface (GUI) for a user by using an on screen display (OSD) or the like, and receives a key input from a user to perform a receiver operation according to the input. For example, the user interface manager 2421 displays the electronic program guide (EPG) on the display unit 2418 and receives a recording request for an event that the electronic program guide (EPG) presents from the user. In addition, the user interface manager 2421 retrieves recording information about a program for which recording is requested from the electronic program guide (EPG) and provides the service manager 2422 to the service manager 2422. The recording information may include service ID information, recording start time information, recording period information, and CRID. In addition, the user interface manager 2421 may transmit the key input signal to the service manager 2422 when receiving a key input related to channel selection from the user.

The user interface manager 2421 controls the display unit 2418 to display a list of available service channels received from the service provider. The list of available service channels may be displayed by the display unit 2418 in the form of an OSD. The user interface manager 2421 transfers recording target program information indicating the recording target program selected by the user on the available service channel list to the service manager 2422. Here, the available service channel list may be included in the content guide information and transmitted, and may be displayed together on the displayed electronic program guide (EPG). The recording target program information may include recording information.

The user interface manager 2421 calculates user recording preference information. The user interface manager 2421 may request a user to input user recording preference information to calculate user recording preference information, and calculate user recording preference information based on the input information according to the request.

In addition, the user interface manager 2421 may calculate user recording preference information based on the usage type information of the user. Herein, the usage type information of the user means information on which the user watches a broadcast or information on which a broadcast is recorded. For example, the usage type information of the user may be program download information.

The program download information is history information on the downloaded program, and may include at least one of downloaded time information, downloaded program name information, downloaded program genre information, and program viewing place information. For example, "2008/7/1" may be the downloaded time information, "3 episodes" as the downloaded program name information, and "drama" as the downloaded program genre information. Here, "restaurant" corresponds to a series, and "three episodes" means an episode number of the series.

The program download information may include at least one of viewing channel information, viewing channel period information, and viewing channel place information. The viewing channel information includes information identifying a channel watched by the user, the viewing channel period information indicates a period during which the user watched the channel, and the viewing channel place information indicates a place where the user watched the channel. For example, "MBC" as the viewing channel information, "21-23" as the viewing channel period information, and "living room" as the viewing channel place information may correspond.

The service manager 2422 controls a manager associated with a service, such as a service delivery manager 2406, a service discovery manager 2426, a service control manager 2428 and a metadata manager 2430, and an IG-OITF client.

The service manager 2422 controls to transmit user recording preference information, remaining storage space information, and available resource information to the service provider. The remaining storage space information may be included in the available resource information and transmitted, or may be separately transmitted. The service manager 2422 controls to transmit the remaining storage space information of the content database unit 2432 to the service provider, and to display a customized broadcast signal based on the transmitted remaining storage space information. The service manager 2422 may receive the remaining storage space information from the PVR manager 2408, and converts the input residual storage space information into the STR_Structure shown in FIG. 11 or FIG. It can be controlled to be transmitted to the service provider by including in the Capacity Information field of the communication packets.

The service manager 2422 controls the recording target program information received from the user interface manager 2421 to be transmitted to the service provider. When receiving the recording target program information from the user interface manager 2421, the service manager 2422 causes the metadata manager 2430 to include service ID information among the recording information on the program requested to be recorded in the service discovery information. The service location information on the service for which recording is requested is compared with the information. The service manager 2422 may control service reception through an address indicated by the service location information. That is, the service manager 2422 may control the service control manager 2428 to access the address indicated by the service location information to receive the content requested for recording, and under the control of the service manager 2422, the PVR manager 2408. ) May store the received service in the content database unit 2432 to perform recording.

The service manager 2422 selects the target bit rate for each section based on the user recording preference information. In this case, the service manager 2422 may select the target bit rate by comparing the segment metadata provided by the metadata manager 2430 with the user recording preference information. In addition, the service manager 2422 may receive residual spatial information from the PVR manager 2406, and select a target bit rate for each section based on the received residual spatial information.

In addition, the service manager 2422 compares the amount of remaining storage space with the total size of the content when there is no user recording preference information or segment metadata, and selects the target bit rate of the entire content when the storage space is insufficient. You can control to start recording. If content segment metadata is included in the content stream after the start of recording and transmitted, the service manager 2422 determines the target bit rate for each section again, and transcodes the program to be recorded according to the determined target bit rate for each section. By controlling, the transcoded recording target program may be controlled to be recorded.

The service manager 2422 controls the recording target program to be transcoded into a target bit rate for each section. Transcoding may be performed in either service delivery manager 2406 or PVR manager 2408.

In addition, the service manager 2422 creates a channel map and selects a channel using the channel map according to a key input received from the user interface manager 2421. The service manager 2422 receives service information of a channel from the data decoder 2412 and sets an audio / video packet identifier (PID) of the selected channel to the demultiplexer 2410.

The service discovery manager 2426 provides information necessary for selecting a service provider providing a service. That is, the service discovery manager 2426 receives the SD & S record, processes it, and stores it in the service information database unit 2424. Upon receiving a signal regarding channel selection from the service manager 2422, the service discovery manager 2426 uses the information to find a service.

The service control manager 2428 is responsible for selecting and controlling a service. For example, if a user selects a live broadcasting service like the conventional broadcasting method, IGMP or RTSP is used. If a user selects a service such as VOD (Video On Demand), RTSP is used to select and control the service. Perform The RTSP protocol may provide a trick mode for real time streaming. In addition, the service control manager 2428 may initialize and manage a session through the IMS gateway 2450 by using an IP Multimedia Subsystem (IMS) or a Session Initiation Protocol (SIP). The protocols are one embodiment, and other protocols may be used depending on implementation.

The meta data manager 2430 manages meta data associated with a service and stores the meta data in the service information database unit 2424. The meta data manager 2430 receives the content guide information from the service delivery manager 2406, and guides the guide information of the specific service based on the service name information included in the service discovery information stored in the service information database 2424. Search from the information to create an electronic program guide (EPG). When the service name information included in the service discovery information is the same as the service ID information included in the content guide information, the meta data manager 2430 may search the guide information indicated by the service ID information as the service guide information. The service discovery information may be included in the broadcast discovery record and transmitted, and the service name information may be information included in 'TextualIdentifier @ ServiceName' of the broadcast discovery record. In addition, the content guide information may be transmitted as BCG metadata, for example, and the service ID information may be information included in 'ServiceInformation @ serviceId' of the BCG metadata. Segment metadata may be included in BCG metadata and transmitted. In addition, the content segment metadata may be transmitted together with the recording target program.

The service information database unit 2424 stores service information decoded by the data decoder 2412, metadata managed by the metadata manager 2430, and information necessary to select a service provider provided by the service discovery manager 2426. . In addition, the service information database unit 2424 may store setup data for the system.

The service information database unit 2424 and the content database unit 2432 may be implemented using nonvolatile memory (NVRAM) or flash memory, respectively, and are divided into two logically separated areas on the same storage area. Can be implemented.

The IMS gateway 2450 is a gateway that collects the functions necessary to access an IMS-based IPTV service based on an IMS core network. An IMS Gateway-OITF (Open IPTV Terminal Function) server 2452, Network discovery 2454, authentication / session management client / server 2456, and RSM 2458. The IPTV 2400 may interface with the IMS gateway 2450 to use an IMS-based IPTV service. Here, the IMS gateway 2450 and the IPTV 2400 are connected through an HNI-IGI interface, which provides the function provided by the IMS gateway 2450 so that the IPTV 2400 can use IMS-based IPTV services. Make it available.

IG-OITF server 2452 provides the functionality of authentication / session management client / server 2456 to IPTV receiver 2400. Here, the IG-OITF server 2452 may provide the IPTV receiver 2400 with a function of the authentication / session management client / server 2456 through a protocol such as HTTP.

The network discovery 2454 finds an IMS server and performs a connection.

The authentication / session management client / server 2456 performs subscriber authentication and session management as required on the managed network.

RMS 2458 performs remote management functions in a managed environment.

25 is a block diagram showing the configuration of a preferred embodiment of the PVR manager according to the present invention.

Referring to FIG. 25, the PVR manager 2408 includes a demultiplexer 2502, a download controller 2504, a metadata controller 2506, a memory buffer controller 2508, an upload controller 2510, and a multiplexer 2512. It may include. In addition, the content database unit 2432 may include a memory buffer 2532.

The demultiplexer 2502 receives the encapsulated content packet from the service delivery manager 2406. Herein, the encapsulated content packet may be a TS packet. When the broadcast mode is the recording mode, the demultiplexer 2502 selects only the A / V packets among the received content packets and outputs them to the download controller 2504. If the broadcast mode is the live mode, the A / V packet is not output to the download control unit 2504 but to the multiplexer 2512. In the live mode, the demultiplexer 2410 separates the A / V packet from the encapsulated content packet and outputs the A / V packet to the video decoder 2415 and the audio decoder 2416.

The download control unit 2504 controls storing the A / V packet in the memory buffer 2532. The download control unit 2504 may store the A / V packet in the memory buffer 2532 using the timestamp selectively. When not using the time stamp, the download control unit 2504 may adjust the storage speed based on the remaining capacity of the memory buffer 2532.

The metadata control unit 2506 processes the metadata for the A / V packet and controls the download control unit 2504 and the upload control unit 2510 based on the processed metadata. For example, the metadata controller 2506 may provide the time stamp information to the download controller 2504 and the upload controller 2510.

The memory buffer control unit 2508 controls the memory buffer 2532. When the broadcast mode is the recording mode, the memory buffer control unit 2508 stores the memory buffer 2532 so that data stored in the memory buffer 2532 is transmitted to the content database unit 2432 in units of a predetermined amount (for example, 384 KB). To control. When the broadcast mode is the reproduction mode, the memory buffer control unit 2508 controls the data stored in the content database 2432 to be transmitted to the memory buffer 2532 in units of a predetermined amount (for example, 384 KB).

The upload controller 2510 detects an A / V packet from the memory buffer 2532 and outputs the A / V packet to the multiplexer 2512. The upload controller 2510 may selectively detect the A / V packet from the memory buffer 2532 using the time stamp. When the time stamp is not used, the upload controller 2510 may adjust the upload speed of the content based on the remaining capacity of the buffers allocated to the video decoder 2415 and the audio decoder 2416.

FIG. 26 is a flowchart illustrating a preferred embodiment of the method for processing broadcast service information according to the present invention.

Referring to FIG. 26, the IPTV receiver 2400 receives service provider discovery information (S2600). In this case, the service provider discovery information may include various types of information about the service provider, for example, service provider identification information, access information, and the like, and may be included in a service provider discovery record and transmitted.

The IPTV receiver 2400 accesses a server of a service provider providing a service desired by the user using the received service provider discovery information and receives service discovery information (S2605). Here, the service discovery information includes broadcast discovery information and broadband content guide discovery information. The broadcast discovery information may be included in the broadcast discovery record and transmitted, and the broadband content guide discovery information may be included in the broadband content guide discovery record and transmitted.

The IPTV receiver 2400 receives the content guide information through the address indicated by the transmission mode included in the broadband content guide discovery information (S2610). Here, the IPTV receiver 2400 receives the content guide information for the service based on the broadband content guide identification information included in the broadcast discovery information, in order to receive the content guide information for the specific service initiated by the broadcast discovery information. Identify broadcast discovery information, including information for: The IPTV receiver 2400 receives the content guide information through the address indicated by the transmission mode information included in the identified broadcast discovery information. In addition, the content guide information may be Broadband Contents Guide (BCG) metadata and may include a list of available service channels.

The IPTV receiver 2400 may generate an electronic program guide (EPG) by searching the guide information of the service from the content guide information based on the service name information of the service included in the service discovery information. When the service name information is the same as the service ID information included in the content guide information, the IPTV receiver 2400 may search the guide information indicated by the service ID information as the guide information of the service.

The IPTV receiver 2400 displays a list of available service channels and receives a recording target program from the user (S2615). The IPTV receiver 2400 checks whether user recording preference information exists (S2620).

If the user recording preference information exists, the IPTV receiver 2400 checks whether segment metadata is included in BCG (Broadband Contents Guide) metadata (S2625).

When the segment metadata is included in the BCG metadata, the IPTV receiver 2400 selects the target bit rate for each section based on the user recording preference information, the segment metadata, and the remaining storage space information (S2630). The IPTV receiver 2400 transcodes a recording target program at a target bit rate for each section. And it records (S2635).

If the segment metadata is not included in the BCG metadata, the IPTV receiver 2400 selects the target bit rate based on the user recording preference information and the remaining storage space information (S2640). The IPTV receiver 2400 transcodes the recording target program based on the selected target bit rate. And it records (S2635).

If the user recording preference information does not exist, the IPTV receiver 2400 checks whether the storage space is sufficient based on the remaining storage space information (S2645). Here, the IPTV receiver 2400 may check whether the storage space is sufficient by comparing the size information of the program included in the available service channel list with the remaining storage space information.

If the remaining storage space is sufficient, the IPTV receiver 2400 records the recording target program (S2635).

If the remaining storage space is not sufficient, the IPTV receiver 2400 selects the target bit rate based on the remaining storage space information (S2650). The IPTV receiver 2400 transcodes the recording target program at the selected target bit rate, and stores the transcoded recording target program (S2635).

The IPTV receiver 2400 checks whether segment metadata is in the content stream (S2655). Here, the service provider may provide segment metadata together with the recording target program.

If the segment metadata is in the content stream, the target bit rate for each section is selected based on the user recording preference information, the segment metadata, and the remaining spatial information (S2600). The IPTV receiver 2400 transcodes the recording target program on the basis of the selected target torsion rate for each section, and re-records the transcoded recording target program (S2265).

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described specific preferred embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

1A to 1C are diagrams illustrating characteristics of a conventional broadcast reception method;

2 is a system hierarchy diagram of an IPTV;

3 is a characteristic diagram of an IPTV system;

4 is a system diagram between a service provider and a broadcast receiver;

5 is a diagram illustrating an embodiment of IP encapsulation when a service provider provides a service to a broadcast receiver through an IP network;

6 is a first embodiment of a method for recording a customized broadcast signal according to the present invention;

FIG. 7 is a view showing a preferred embodiment of a process between a service provider and a broadcast receiver in a first embodiment of a method for recording a customized broadcast signal according to the present invention; FIG.

8 is a second embodiment of a method for recording customized broadcast signal according to the present invention;

FIG. 9 is a view showing a preferred embodiment of a process between a service provider and a broadcast receiver in a second embodiment of a method for recording a customized broadcast signal according to the present invention; FIG.

10 illustrates an embodiment of a data structure for transmitting resource information of a broadcast receiver from a broadcast receiver to a service provider;

11 illustrates an embodiment of a data structure for transmitting remaining storage space information of a broadcast receiver from a broadcast receiver to a service provider according to the present invention;

12 illustrates another embodiment of a data structure for transmitting remaining storage space information of a broadcast receiver from a broadcast receiver to a service provider according to the present invention;

FIG. 13 is a diagram illustrating a schema for a user description type according to the present invention; FIG.

14 is a diagram showing a schema for a user preference type according to the present invention;

15 is a diagram illustrating a schema for a recording preference type according to the present invention;

16 is a diagram illustrating a schema for a creation preference type according to the present invention;

FIG. 17 is a diagram illustrating a schema for a Classication Preference Type according to the present invention; FIG.

18 is a diagram illustrating a schema for a source preference type according to the present invention;

19 is a diagram illustrating a schema for a segment information table according to the present invention;

20 is a diagram illustrating a schema for a segment group information type according to the present invention;

21 is a diagram showing code in XML for Groups Type according to the present invention;

22 is a diagram illustrating a schema for a segment information type according to the present invention;

FIG. 23 is a diagram illustrating a schema for a BasicSegmentDescription Type according to the present invention; FIG.

24 is a block diagram showing the configuration of a preferred embodiment of a digital broadcast receiver according to the present invention;

25 is a block diagram showing the configuration of a preferred embodiment of a PVR manager according to the present invention;

FIG. 26 is a flowchart illustrating a preferred embodiment of the method for processing broadcast service information according to the present invention.

Claims (18)

Connecting with a service provider via an IP network; Receiving an available service channel list including available service channel information from the service provider; Transmitting recording target program information indicating the recording target program selected from the received available service channel list to the service provider; And Receiving the recording target program, selecting a target bit rate for each section based on user recording preference information indicating content preferences of the stored user, and targeting the selected recording target program for the selected section Transcoding and storing at a bit rate; Custom broadcast signal recording method comprising a. The method of claim 1, The user recording preference information includes at least one of content production preference information including information related to content creation, content classification preference information including information related to content classification, and content source preference information including information related to a content source. Custom broadcast signal recording method characterized in that. The method of claim 1, And the user recording preference information includes weight information for comparing mutual priority between information included in the user recording preference information. The method of claim 1, And the user recording preference information is calculated from at least one of information input by a user and user usage information. The method of claim 1, Transmitting available resource information, which is available information on a resource of a broadcast receiver, to the service provider; And the available service channel list is selected based on the available resource information. The method of claim 1, In the storing step, Receiving segment metadata including segment information of the recording target program; And a target bit rate for each section based on the received segment metadata. The method of claim 1, And the available service channel list includes segment metadata including segment information of a program. The method of claim 1, In the storing step, And a target bit rate for each section is selected based on the remaining storage space information indicating the remaining capacity of the storage space. Connecting with a service provider through an IP network; Transmitting user recording preference information indicating a user's content preference to the service provider; Transmitting remaining storage space information indicating a remaining capacity of the storage space to the service provider; Transmitting recording target program information indicating a recording target program to the service provider; And And receiving and storing the recording target program having a target bit rate for each section selected based on the remaining storage space information and the user recording preference information. Way. A network interface unit for transmitting and receiving an IP packet with a service provider through a network; A display unit displaying a list of available service channels received from the service provider; A target bit rate for each section based on the user recording preference information indicating control of the recording target program information indicating the recording target program selected from the available service channel list to be transmitted to the service provider and indicating the content preference of the stored user; an application manager configured to select a bit rate and to control transcoding the program to be recorded at the target bit rate for each section; And And a service control manager for controlling the reception of the recording target program from the service provider. The method of claim 10, The user recording preference information includes at least one of content production preference information including information related to content creation, content classification preference information including information related to content classification, and content source preference information including information related to a content source. Broadcast receiver, characterized in that. The method of claim 10, And the user recording preference information includes weight information for comparing mutual priority between information included in the user recording preference information. The method of claim 10, The application manager, And calculating the user recording preference information from at least one of information input by the user and usage type information of the user. The method of claim 10, The application manager, Control to transmit available resource information, which is available information on a resource of a broadcast receiver, to the service provider; And the available service channel list is selected based on the available resource information. The method of claim 10, The metadata manager, Receiving segment metadata including segment information of the recording target program transmitted from the service provider, The application manager, And a target bit rate for each section based on the received segment metadata. The method of claim 10, And the available service channel list includes segment metadata including segment information of a program. The method of claim 10, The application manager, And selecting the target bit rate for each section based on the remaining storage space information indicating the remaining capacity of the storage space. A network interface unit for transmitting and receiving an IP packet with a service provider through a network; A display unit displaying a list of available service channels received from the service provider; User recording preference information indicating the user's content preference, remaining storage space information indicating the remaining capacity of the storage space, and recording target program information indicating the recording target program selected from the available service channel list are transmitted to the service provider. An application manager for controlling; And And a service control manager for controlling the reception of the recording target program having a target bit rate for each section selected from the service provider based on the remaining storage space information and the user recording preference information. Broadcast receiver.

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