CN101202600A - System for providing broadcast content information and method for providing broadcast service in the system - Google Patents

Abstract

A system and method for providing information about current broadcast content at a broadcast server. A multimedia broadcasting system comprising: a broadcast server for broadcasting a package including a broadcast content ID corresponding to currently broadcast broadcast content for each broadcast channel; and a broadcast receiving terminal, when a broadcast channel is selected, A packet is received through a broadcast channel, and content information corresponding to a content ID included in the received packet is checked using previously stored broadcast schedule information to check received broadcast content.

Description

System for providing broadcast content information and method for providing broadcast service in the system

Technical field

The present invention generally relates to a system and method for providing broadcast services, and more particularly, to a system and method for sequentially providing broadcast content information to a broadcast server to provide accurate information on currently broadcast broadcast content.

Background technique

Generally, broadcast services are provided to users through general household televisions (TVs) and portable terminals. The number of users receiving broadcast services through portable terminals has greatly increased. Mobile TV services are examples of broadcast services provided through portable terminals, and generally conform to various standards including, for example, Digital Multimedia Broadcasting (DMB), Digital Video Broadcasting-Handheld (DVB-H), Open Mobile Alliance Broadcasting (OMA-BCAST )wait. In Europe and the United States, as well as in South Korea, mobile TV services are usually provided to users through test broadcasts or regular broadcasts based on this standard. Mobile TV services including existing digital TV services have recently provided a new type of service called data service in addition to video/audio services provided in existing broadcasting.

A conventional DVB-H system for providing broadcast services will now be described with reference to FIG. 1 .

In FIG. 1, a content providing unit 102 is managed by a content provider, and generates various broadcast contents to be broadcast by DVB-H broadcasting stations. The content used herein refers to a basic broadcast unit distinguished by time according to a broadcast schedule composed using an electronic service guide (ESG) or an electronic program guide (EPG). When multimedia data is provided from the content providing unit 102, after packetizing and multiplexing the input data, a common carrier broadcasts the input data through the broadcasting unit 106 according to a broadcasting method. In other words, the broadcast unit 106 packs the transmission multimedia data through the Internet Protocol (IP) encapsulator (capsulator) 104, multiplexes the packed multimedia data through the multiplexer 105, and then broadcasts the multiplexed data through the broadcast communication network 110. multimedia data.

When the multiplexed multimedia data is broadcast from the broadcast server 100 , the user's broadcast receiving terminal 120 receives the broadcast multimedia data through the broadcast receiver 121 . The received multimedia data is demultiplexed and decapsulated by the demultiplexer 122 and the IP decapsulator 123 included in the broadcast receiver 121, thereby being reconstructed into original multimedia data. The reconstructed multimedia data is then output to the multimedia processor 124 of the broadcast receiving terminal 120 for processing so that a broadcast corresponding to a channel selected by the user can be output.

In a system providing a broadcast service, the broadcast server transmits broadcast service information such as service type and details provided in each channel and reception information for receiving the broadcast service to the broadcast reception terminal 120 . The broadcast service information may be an electronic program guide (EPG) in case of DMB, or an electronic service guide (ESG) in case of DVB-H.

The broadcast receiving terminal 120 that receives the broadcast service information stores the broadcast service information in advance. Once a predetermined broadcast channel is selected for a broadcast service, the broadcast receiving terminal 120 receives broadcast content through the selected broadcast channel by referring to previously stored broadcast service information, and provides the broadcast content. In other words, when a broadcast service is provided, broadcast content to be provided may be identified based on previously received broadcast service information.

Meanwhile, the broadcast content currently broadcast through the selected broadcast channel and the broadcast content scheduled to be broadcast at the current point of time according to previously received broadcast service information may be different from each other. In this case, the broadcast receiving terminal 120 checks broadcast content information on the selected broadcast channel from previously received broadcast service information according to a request to view broadcast content information currently broadcast through the broadcast channel selected by the user, and provides the broadcast content information. . Accordingly, broadcast content information different from broadcast content information currently broadcast through the selected broadcast channel may be provided to the user.

For example, it is assumed that the first channel plans to broadcast drama A from 8:00 pm to 9:00 pm according to the previously received broadcast service information, and the first channel plans to broadcast drama B from 9:00 pm to 10:00 pm, but due to the broadcast Some broadcast delay by server 100 changes the schedule of drama A, so drama A will be broadcast until 9:10 pm, and drama B will be broadcast from 9:10 pm to 10:10 pm.

If the user confirms that drama B is scheduled to start at 9:00 p.m. The broadcast service information is also information on drama A rather than information on drama B desired by the user. Since drama B is provided as broadcast content information even though the broadcast content currently broadcast on the first channel is drama A, the user cannot be provided with accurate information on the current broadcast content.

If the user sets a reserved record for the reserved record of drama B about the content to be broadcast on the first channel from 9:00 pm to 10:00 pm, the broadcast receiving terminal 120 starts recording the content broadcasted by the first channel at 9:00 pm , and the recording is terminated at 10:00 PM. However, since drama A was broadcast on Channel 1 at 9:00 pm instead of drama B, and drama B actually started at 9:10 pm, part of drama A was also recorded. Furthermore, since the recording is terminated at 10:00 pm, a part of drama B corresponding to the last 10 minutes cannot be recorded.

A conditional access system (CAS) for providing a paid service assigns a unique entitlement identifier (ID) to multimedia content of a scrambled channel to identify the multimedia content. Although a terminal with a CAS can recognize multimedia content, a server providing multimedia content must include a scrambling module, and a terminal must include a descrambling module. Also, due to the large amount of calculation required for descrambling, it causes a heavy load in the terminal.

As described above, conventionally, a user checks information on broadcast content according to previously provided broadcast service information, and sets a reserved record on desired content by referring to previously provided broadcast service information without actually identifying the broadcast content.

Therefore, if the previously provided information on the broadcast content is different from the actual broadcast content, wrong information may be provided to the user instead of correct information on the actual broadcast content. Furthermore, in the reserved recording, the user may record undesired content in addition to desired content, resulting in waste of memory and power, or even failure to record desired content.

Although CAS can recognize content, in order for a terminal with CAS to recognize multimedia content, the server must include a scrambling module, and the terminal must include a descrambling module. Also, due to the large amount of calculation required for descrambling, it causes a heavy load in the terminal. In addition, there is a need to provide broadcast content information in which accurate information on currently broadcast broadcast content can be provided.

Contents of Invention

The present invention is to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention is to provide a system and method for providing broadcast content information, in which accurate information on currently broadcast broadcast content can be provided.

Another aspect of the present invention is to provide a system and method for providing broadcast content information, in which information on currently broadcast broadcast content is transmitted with a small amount of data, and a broadcast receiving terminal can recognize the broadcast content with a small calculation amount.

According to an aspect of the present invention, there is provided a multimedia broadcasting system, the system comprising: a broadcast server for broadcasting a packet, the packet including a broadcast content ID corresponding to currently broadcast broadcast content for each broadcast channel; And the broadcast receiving terminal, when a broadcast channel is selected, receives a packet through the broadcast channel, and checks content information corresponding to a content ID included in the received packet using previously stored broadcast schedule information to check received broadcast content.

According to another aspect of the present invention, there is provided a method of providing broadcast content information in a multimedia broadcast system including a broadcast server and a digital broadcast receiving terminal. The method includes: a first step, the broadcast server broadcasts a packet, the packet includes a broadcast content ID corresponding to the currently broadcast broadcast content for each broadcast channel; second step, when the broadcast channel is selected, the digital broadcast receiver The terminal receives the packet through the broadcast channel; and in a third step, the digital broadcast receiving terminal checks the content information corresponding to the content ID included in the received packet using previously stored broadcast schedule information to check the received broadcast content.

According to an aspect of the present invention, there is provided a multimedia broadcasting system including: a broadcasting server for broadcasting a package including a broadcasting content ID corresponding to currently broadcasting broadcasting content for each broadcasting channel; and digital broadcasting The receiving terminal, when selecting broadcast content for reserved recording, starts packet reception at a time point of a preset content search time before a broadcast start time of the selected broadcast content through a broadcast channel for broadcasting the selected broadcast content, and checks including Whether the content ID in the received packet is the same as the content ID corresponding to the broadcast content for which the reserved record is set, and only the received packet including the same content ID as the content ID corresponding to the broadcast content for which the reserved record is set is recorded multimedia data.

According to another aspect of the present invention, there is provided a method for retaining and recording broadcast content by a digital broadcast receiving terminal in a multimedia broadcast system including a broadcast server and a digital broadcast receiving terminal. In the method, the broadcast server broadcasts a package including a broadcast content ID corresponding to currently broadcast broadcast content for each broadcast channel; when selecting a broadcast content for reserved recording, the digital broadcast receiving terminal passes a broadcast channel for broadcasting the selected broadcast content, starting packet reception at a time point of a preset content search time before a broadcast start time of the selected broadcast content; and the digital broadcast receiving terminal analyzes the content ID included in the received packet, and Only the multimedia data of the received packet including the same content ID as the content ID corresponding to the broadcast content for which reserved recording is set is recorded.

Description of drawings

The above and other features and advantages of the present invention will become more apparent through the following detailed description in conjunction with the accompanying drawings, wherein:

1 is a block diagram of a DVB-H system for providing broadcast services according to the prior art;

2 is a block diagram of a system for providing broadcast content information on currently broadcast broadcast content according to the present invention;

3 is a block diagram of a broadcast receiving terminal checking information on currently broadcast broadcast content according to the present invention;

Fig. 4 shows the content information packet format according to the present invention;

5 is a flow chart of a process in which a broadcast server provides broadcast content information on currently broadcast broadcast content according to the present invention;

6 is a flowchart of a process in which a broadcast receiving terminal receives information on currently broadcast broadcast content and checks the broadcast content information according to the first embodiment of the present invention;

FIGS. 7A and 7B are flowcharts of a process of a broadcast receiving terminal checking information on currently broadcast broadcast content and recording broadcast content for which reserved recording is set, according to a second embodiment of the present invention.

Throughout the drawings, like reference numerals will be understood to refer to like components, features and structures.

Detailed ways

Matters defined in the specification, such as detailed structures and components, are provided to assist in a comprehensive understanding of the exemplary embodiments of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions will be omitted for clarity and conciseness.

The present invention provides a solution: a broadcast server provides information about currently broadcast broadcast content to a broadcast receiving terminal. To this end, the present invention provides two schemes for transmitting broadcast content information. The first scheme provides broadcast content IDs using Internet Protocol (IP) packets in addition to multimedia packets, and the second scheme provides broadcast content IDs using Real-time Transport Protocol (RTP) packets during transmission of multimedia packets. In the present invention, a Digital Video Broadcasting-Handheld (DVB-H) system will be taken as an example of a broadcasting system. However, the present invention is also applicable to other systems including, for example, Digital Multimedia Broadcasting (DVB) systems, Open Mobile Alliance Broadcasting (OMA-BCAST) systems, and the like.

A system for providing broadcast content information on currently broadcast broadcast content using a first scheme will be described with reference to FIG. 2 .

Referring to FIG. 2 , a broadcast server 200 for broadcasting multimedia data may include a content providing unit 202 and a broadcasting unit 207 . The content providing unit 202 is managed by a content provider, and generates various broadcast contents broadcast by the broadcast server 200 . The broadcast unit 207 is managed by a carrier, and packages and multiplexes broadcast content generated by the content providing unit 202, and broadcasts the broadcast content as a radio frequency (RF) signal. A content provider is an operator responsible for generating various broadcast contents, and a communication company is an operator responsible for providing broadcast content services to users through a specific communication line leased frequency.

Data provided from the content providing unit 202 may include program data (ie, audio/video (AV) data) of a broadcast channel and electronic service guide (ESG). The AV data indicates multimedia data for reproducing broadcast content provided from the content providing unit 202 in the form of an audio signal and a video signal at a receiving terminal.

Once the multimedia data is provided from the content providing unit 202 , the carrier packs and multiplexes the input multimedia data according to a broadcasting method, and broadcasts the multimedia data through the broadcasting unit 207 . Accordingly, the broadcast unit 207 includes an IP encapsulator 204 and a multiplexer 205 for packetizing and multiplexing broadcast data. Specifically, the broadcast unit 207 according to the present invention includes: a content information packet generator 206 for generating a content information packet including a content ID for each broadcast content during transmission of multimedia data provided in a time-division form, and The generated content information packets are output to the IP encapsulator 204 . Then, the IP encapsulator 204 performs IP encapsulation of the multimedia data and content information packets according to the broadcasting method of the DVB-H system (ie, Internet Protocol Datacasting (IPDC)), and then the multiplexer 205 performs multiplexing.

The broadcast server 200 using the first scheme according to the present invention broadcasts a packet including a broadcast content identifier (ID) for each broadcast channel corresponding to currently broadcast broadcast content. The content information package transmitted from the broadcast server 200 is transmitted separately from the multimedia package for providing broadcast content of each broadcast channel. The content information packets sent separately may have the format shown in FIG. 4 . In FIG. 4, the content information packet includes: a packet ID field, a data type field, a content ID field, a time stamp flag field, an audio/video (A/V) indicator field, and a time stamp field. The package ID field has a unique value indicating that the current package has a format including a content ID. The data type field has a value indicating the data type of the content ID. The content ID field has a unique ID of the content, and is the same as the content ID corresponding to the broadcast schedule information. The time stamp flag field has a value indicating whether to send a time stamp. The A/V indicator field has a value indicating whether the standard of the time stamp is audio, video or data. The timestamp field has a timestamp value calculated by applying the same standard as that used for multimedia real-time transport protocol (RTP) packets.

In a content information packet, such as the packet shown in FIG. 4, the standard of the time stamp differs according to the type of media included in the A/V indicator field. One of media types included in currently broadcast broadcast content is indicated in the A/V indicator field, and a time stamp may be represented based on the media. The time interval at which the broadcast server 200 transmits content information packets is not directly related to the A/V sampling rate or frame rate. As the time interval becomes shorter, the resolution for recognizing content increases, but the load on the system may become larger. Considering these, an appropriate interval can be selected. For a system where a large packet transmission delay does not occur, or a broadcast service that does not require detailed content identification, the time stamp information may be omitted. In this case, the packet including the content ID proposed in the present invention and the A/V packet received at the closest time to receiving the packet are assumed to be time-synchronized with each other.

The broadcast server 200 transmits reception information on a new session for broadcasting a packet including a content ID of a broadcast channel through a Session Description Protocol (SDP) of the ESG during transmission of the ESG. In the present invention, the MIME type (for example, "m=<media><port>/<number of ports><transport><fmt list>") for the broadcast content information packet can be added to the SDP. For "<media type>", MIME media types or usable data types can be newly added. "<port>" indicates the transport port, and "<number of ports>" indicates the number of ports. Since the number of ports is 1, "<number of ports>" can be omitted, "<transport>" is the transport protocol, and User Datagram Protocol (UDP) can be used. "<fmt list>" defines a new MIME type for the format of the Content ID packet. Attributes can be used to represent parameters for the format.

A process in which the broadcast server 200 provides broadcast content information on currently broadcast broadcast content will now be described with reference to FIG. 5 .

In step 500, the broadcast server 200 checks the content ID of the currently broadcast multimedia. In step 502, the broadcast server 200 then generates a content information packet by the content information packet generator 206, the content information packet including the content ID and time corresponding to each broadcast content transmitted during the transmission of the multimedia data provided in a time-division form. stamp. Then, in step 504 , the broadcast server 200 performs IP encapsulation on the generated content information packet and multimedia data through the IP encapsulator 204 . In step 506 , the broadcast server 200 multiplexes the IP-encapsulated packets through the multiplexer 205 .

The broadcast receiving terminal 220 that receives the provided content information will be described with reference to FIG. 2 again.

When the broadcast server 200 broadcasts the multiplexed multimedia data on the broadcast communication network 210 , the broadcast receiving terminal 220 receives the multimedia data through the broadcast receiver 221 . The demultiplexer 222 and the IP decapsulator 223 included in the broadcast receiver 221 demultiplex and decapsulate received data, thereby reconstructing original multimedia data. The multimedia data is output to the multimedia processor 224 of the broadcast receiving terminal 220 to output a broadcast corresponding to a channel selected by the user. The content ID checking unit 226 of the multimedia processor 224 checks the content ID included in the content information packet output from the IP decapsulator 223 . When a time stamp is sent by the packet proposed in the present invention, the time stamp sent is compared with the time stamp sent by the A/V RTP packet to determine what the received A/V data corresponds to. When the check of the content information is necessary, the content information corresponding to the content ID included in the received packet is checked by referring to the previously stored ESG. In order to check currently broadcast content information, the broadcast receiving terminal 220 checks a broadcast schedule that can be composed based on ESG information stored in the ESG data storage unit 225, and checks content information corresponding to a content ID included in the checked broadcast schedule. .

The broadcast receiving terminal 220 for receiving content information from the broadcast server 200 and checking information on currently broadcast broadcast content will now be described with reference to FIG. 3 .

The broadcast receiving terminal 220 according to the present invention includes a broadcast receiver 221 , a multimedia processor 224 , an RF transceiver 303 , a key input unit 304 , a display unit 305 , a memory unit 306 , a voice band signal processor 307 and a controller 300 .

The controller 300 performs overall control of a general terminal, processes audio signals and data according to protocols of wireless Internet connection and digital broadcasting, and controls components of the broadcasting receiving terminal 220 . Specifically, the controller 300 according to the present invention receives a package provided through a broadcast channel selected by the user, checks a content ID included in the received package, and then uses a previously stored broadcast schedule to check that the content ID corresponds to the checked content ID. content information to check information about received broadcast content. A control operation of the controller 300 when providing accurate information on currently broadcast broadcast content will be described later with reference to FIG. 6 .

If a user sets a reserved record for broadcast content to be provided at a specific time point, the controller 300 controls the reserved record operation. The controller 300 presets a time point of a content search time before a broadcast start time of the selected broadcast content through a broadcast channel for broadcasting the selected broadcast content, and starts packet reception through the broadcast receiver 221 . The controller 300 also checks whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which the reservation record is set.

For example, if the user sets a reservation record for drama A to be provided on the first channel from 9:00 pm to 10:00 pm, and sets the content search time to 10 minutes, the controller 300 checks the content corresponding to drama A ID, and check the content ID included in the packet received from 8:50 pm. If it is confirmed during the check that the content ID is identical to the content ID corresponding to the drama A, the controller 300 controls to start recording the received packet.

When the content ID included in the packet received during the recording is different from the content ID corresponding to the drama A in which the reserved recording is set, the controller 300 controls to suspend the recording for a preset recording suspension maximum time, and checks the contents included in the received The ID of the content in the package.

When a packet including the same content ID as the content ID corresponding to drama A for which reserved recording is set is received within the preset recording pause maximum time, the controller 300 controls to continue the recording. However, if a packet including the same content ID as the content ID corresponding to drama A for which reserved recording is set is not received within a preset recording pause maximum time, the controller 300 controls the recording to be terminated.

In the recording pause state or before the recording start time point, the controller 300 checks the content ID included in the received packet by applying power to the broadcast receiver 221 at a preset search interval.

A detailed control operation in which the controller 300 checks a content ID included in a received packet to check whether the received packet belongs to broadcast content for which a reservation record is set according to the present invention will be described later with reference to FIGS. 7A and 7B .

The broadcast receiver 221 includes: a demultiplexer 222 for demultiplexing broadcast packets including multimedia data into multimedia packets and content information packets; and an IP decapsulator 223 for decapsulating the demultiplexed packets. The RF transceiver 303 performs data processing for wireless communication with a base station. The key input unit 304 includes various keys (including numeric keys), and supplies key input signals input from a user to the controller 300 . The display unit 305 displays messages under the control of the controller 300 . The display unit 305 may include a liquid crystal display (LCD), a thin film transistor (TFT), and an organic electroluminescence (EL).

The multimedia processor 224 checks reception information about the broadcast channel selected by the user from the ESG data storage unit 225, and outputs multimedia data of broadcast packets transmitted through the selected broadcast channel according to the checked reception information. Specifically, the multimedia processor 224 according to the present invention includes a content ID checking unit 226 for checking a content ID included in a packet output from the IP decapsulator 223 . If the received broadcast packet includes a multimedia RTP packet and a content information packet, the content information is checked from a content ID field included in the content information packet. When checking of the content information is necessary, the content information corresponding to the content ID included in the received packet is checked with reference to a broadcast schedule composed of ESGs that may be previously stored in the ESG data storage unit 225 .

The memory unit 306 may include read only memory (ROM), flash memory, and random access memory (RAM). The ROM stores programs and reference data for processing and controlling operations of the controller 300 . RAM provides working memory of the controller 300 . Flash memory provides an area for storing updatable reserved data. The memory unit 306 also includes the ESG data storage unit 225, which may pre-store information on sub-services of the main service checked by the controller 300 by parsing the ESG data. A schedule such as a broadcast schedule including information on broadcast content provided for each broadcast channel in units of time generated by the controller 300 may be stored. In the present invention, the information on broadcast content includes a broadcast content ID in addition to general information on broadcast content. By storing the analysis result in advance, when the broadcast service corresponding to the channel is selected using the stored information, the broadcast corresponding to the channel can be output, thereby shortening the time for providing the broadcast service.

The memory unit 306 stores a content search time to record the selected broadcast content, which indicates how much before or after the start time of the broadcast content for which recording retention is set, broadcast packet reception starts. The start time of the selected broadcast content is provided in the broadcast schedule. The memory unit 306 also stores a recording suspension maximum time for suspending recording when the content ID included in the packet received during recording is different from the content ID corresponding to the broadcast content for which recording-on-hold is set. The memory unit 306 also stores a search interval at which the content ID included in the received packet is checked in the recording pause state or before the recording start time point.

The voice band signal processor 307 is connected with the microphone MIC and the speaker SPK, converts the voice band signal received by the microphone MIC into data and outputs the data to the controller 300 according to the call connection, and the voice band output from the controller 300 Data is converted to audible sound.

A process for checking content information on broadcast content currently received at the broadcast receiving terminal 220 will now be described with reference to FIG. 6 .

The controller 300 of the broadcast receiving terminal 220 receives the ESG transmitted from the broadcast server 200 and stores the received ESG in the ESG data storage unit 225 .

In step 600, the controller 300 checks broadcast service information on a broadcast channel selected by a user through the ESG or according to a reserved record function. In step 602, the controller 300 then receives a packet corresponding to the selected broadcast channel using the checked broadcast service information. At this time, the broadcast receiving terminal 220 checks reception information for receiving content information corresponding to the selected broadcast channel through a Session Description Protocol (SDP), and then receives a content information packet using the checked reception information. The broadcast receiving terminal 220 also checks reception information for receiving multimedia data corresponding to the selected broadcast channel, and then receives a multimedia data packet using the checked reception information.

Then, at step 604, the controller 300 checks the content ID corresponding to the currently broadcast broadcast content from the content information packet. In step 606, the controller 300 checks the content ID corresponding to the currently selected broadcast channel using the stored ESG, and checks whether the checked content ID is the same as the content ID included in the received content information packet. If both are the same, the controller 300 proceeds to step 608 to provide content information corresponding to the currently selected broadcast channel.

If the detected content ID is different from the content ID included in the received content information packet, the controller 300 proceeds to step 610 to check content information corresponding to the content ID included in the received content information packet using the ESG, and Then provide the content information of the inspection.

In step 612 , when the broadcast termination is requested, the controller 300 stops the operation, otherwise, the controller 300 proceeds to step 600 .

A second scheme of providing broadcast content IDs through multimedia packets will now be described. The multimedia packet is then sent in an RTP packet, and the content ID must be added to the RTP payload to send the broadcast content ID through the RTP packet. The broadcast receiving terminal 220 must be able to recognize the RTP payload type for the previously agreed content ID and analyze the content ID included in the RTP payload to check whether multimedia data is included and in which content the multimedia data is contained.

As described above, in the present invention, the broadcast receiving terminal 220 may determine which content the received multimedia data corresponds to using the content ID included in the received broadcast packet.

A process in which the broadcast receiving terminal 220 checks information on currently broadcast broadcast content and records the broadcast content with reserved recording set according to the second example of the present invention will now be described with reference to FIGS. 7A and 7B . In order to keep records, the user must preset content information for keeping records, content search time, record pause maximum time, and search interval.

Referring to FIG. 7A , in step 700 , the controller 300 checks a broadcast start time of a broadcast content for which a user sets a reserved record from a broadcast schedule stored in the ESG data storage unit 225 . Then, the controller 300 sets a time point of a preset content search time before the checked broadcast start time as a packet reception start time point. For example, when the selected broadcast content is scheduled to start at 9:00 pm, and the content search time is preset to 10 minutes, the packet reception start time point is 8:50 pm.

In step 702 , the controller 300 checks whether the current time point is the same as the packet reception start time point that has been set in step 700 . Here, the current time point means the system time. For example, in step 702, the controller 300 checks whether the system time is 8:50 PM.

When the current time point checked at step 702 is the same as the packet reception start time point, the controller 300 proceeds to step 704 . Otherwise, the controller 300 proceeds to step 702 to wait until the packet reception start time point.

When the controller 300 proceeds from step 702 to step 704, the controller 300 receives, through the broadcast receiver 221, a packet broadcast on a broadcast channel in which a reserved record is set, and analyzes a content ID included in the received packet. In step 706, the controller 300 checks whether the content ID corresponding to the broadcast content for which the reserved recording is set and the analyzed content ID are the same. In other words, the controller 300 determines whether the multimedia data included in the received packet is multimedia data for which reserved recording is set.

When the content ID corresponding to the selected broadcast content is the same as the analyzed content ID at step 706, the controller 300 proceeds to step 708 to start recording. Otherwise, the controller 300 proceeds to step 704 to analyze the content ID included in the received packet to check whether the content ID is the same. Recording as used herein refers to an operation of storing multimedia data of a received packet in the memory unit 306 . Step 706 may be performed at predetermined intervals to check whether the content ID corresponding to the broadcast content for which the reserved record is set is the same as the content ID analyzed in step 704, thereby reducing power for packet reception.

When the controller 300 performs recording at step 708, at step 712, the controller 300 may analyze the content ID included in the received packet, and then check at step 714 the content ID and analysis corresponding to the broadcast content for which reserved recording is set. have the same content ID. In other words, the controller 300 continuously determines during recording whether the multimedia data included in the received packet is multimedia data for which reserved recording is set.

When the content ID corresponding to the selected broadcast content is the same as the analyzed content ID at step 714, the controller 300 proceeds to step 708 to continue recording. Otherwise, the controller 300 proceeds to step 716 to check whether the content ID included in the received packet is a content ID corresponding to another broadcast content in the broadcast schedule.

When the content ID included in the received packet exists in the broadcast schedule at step 716, the controller 300 terminates the recording. In other words, if the same content ID as the content ID included in the received packet exists in the broadcast schedule, the controller 300 determines whether the broadcast of the broadcast content for which the user has set record keeping is terminated. In this case, the content ID included in the received packet may be a content ID corresponding to broadcast content scheduled to be broadcast after the currently recorded broadcast content.

When the content ID included in the received packet does not exist in the broadcast schedule at step 716, the controller 300 proceeds to (A). Processing after (A) will now be described with reference to FIG. 7B .

Referring to FIG. 7B, since the content ID included in the received packet does not exist in the broadcast schedule, the controller 300 proceeds to step 718 where the controller 300 suspends recording. In other words, since the content included in the currently received package does not exist in the broadcast schedule, and may be a temporary broadcast that is not scheduled to be broadcast, such as an emergency broadcast or an advertisement broadcast, the controller 300 suspends the recording. When a temporary broadcast (such as an emergency broadcast or an advertisement broadcast) that is not scheduled to be broadcast occurs during recording of the selected broadcast content, the controller 300 pauses the recording in the middle of the selected broadcast content, and then sequentially records the selection from the end of the paused portion broadcast content to perform follow-up recording. In this way, it is possible to record only multimedia data corresponding to broadcasting content for which record-holding is set by the user.

Thereafter, in the recording pause state, the controller 300 analyzes the content ID included in the received packet at step 720 and checks whether the content ID corresponding to the broadcast content for which reserved recording is set is the same as the analyzed content ID at step 722 . In other words, in the recording pause state, the controller 300 determines whether the multimedia data included in the received packet is multimedia data for which reserved recording is set. The analysis of the content ID included in the received packet may be performed at predetermined intervals. In other words, in the present invention, the step of determining whether the received multimedia data is subject to reserved recording without actually recording the received multimedia data may be performed at predetermined intervals instead of for each data, to reduce the number of terminals. power consumption.

When the content ID corresponding to the broadcast content with reserved recording set and the analyzed content ID are the same in step 722, the controller 300 proceeds to step 724 to record the broadcast content with reserved recording set by re-subsequently from the end of the paused section. to perform subsequent recording, and then proceed to (C) to proceed to step 712 of FIG. 7A.

However, when the content ID corresponding to the broadcast content for which the reserved record is set is different from the analyzed content ID at step 722, the controller 300 proceeds to step 726 to check whether the content ID included in the received packet exists at the broadcast time table.

If the content ID included in the received packet exists in the broadcast schedule, the controller 300 proceeds to (B) to terminate the recording. If the content ID included in the received packet does not exist in the broadcast schedule, the controller 300 proceeds to step 728 to check whether the broadcast end time and the record pause maximum time of the broadcast content for which the record keeping is set are exceeded.

If the broadcast end time and the recording pause maximum time of the broadcast content for which the recording is reserved are set, the controller 300 proceeds to (B). If the broadcast end time and the recording pause maximum time of the broadcast content for which the recording is reserved are set, the controller 300 proceeds to step 720 . In other words, the broadcast end time is exceeded according to the broadcast schedule, and the controller 300 waits from this point of time until the recording pause maximum time is exceeded. If the multimedia data corresponding to the broadcasting content for which the reserved recording is set is no longer received, the controller 300 terminates the recording without receiving any data to reduce power consumption of the terminal.

Although not shown in FIG. 7B , the controller 300 terminates the recording in some cases. For example, when the recording period exceeds the maximum recording time, when the user forcibly terminates the recording, when the recording must be terminated due to the state of the terminal, or when data reception is not smooth at a specific time due to a poor reception state, the controller 300 can terminate the record. Also, keeping records performed as expected in the terminal in the background.

As apparent from the above description, according to the present invention, it is possible to provide accurate information on currently broadcast broadcast content in a broadcast receiving terminal. In addition, information on currently broadcast broadcast content can be transmitted with a small amount of data, and the broadcast receiving terminal can recognize the broadcast content with a small calculation amount.

In addition, according to the present invention, a user can perform reserved recording only for desired broadcast content using a technique for identifying broadcast content, thereby increasing user convenience, reducing terminal power consumption, and saving memory.

While the present invention has been shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (35)

1. A multimedia broadcasting system, the system comprising: a broadcast server for broadcasting a packet including a broadcast content ID corresponding to currently broadcast broadcast content for each broadcast channel; and The broadcast receiving terminal, when a broadcast channel is selected, receives a packet through the broadcast channel, and checks content information corresponding to a content ID included in the received packet using previously stored broadcast schedule information to check received broadcast content. 2. The multimedia broadcasting system as claimed in claim 1, wherein the broadcast server transmits the broadcast content ID, which is different from the currently broadcast The broadcast content of each broadcast channel is corresponding. 3. The multimedia broadcasting system of claim 1, wherein the broadcast server broadcasts reception information about a new session for transmitting packets through the electronic service guide, the reception information including a content ID corresponding to a broadcast channel. 4. The multimedia broadcasting system of claim 3, wherein the reception information about the new session for the broadcast package including the content ID corresponding to the broadcast channel is transmitted through a session description protocol file of the electronic service guide. 5. The multimedia broadcasting system as claimed in claim 4, wherein the digital broadcasting receiving terminal receives and stores the electronic service guide, checks the receiving information for receiving the content information corresponding to the selected broadcasting channel through the SDP file, and uses the checked receiving information to receive the package, and check the content ID included in the received package. 6. The multimedia broadcast system as claimed in claim 5, wherein the digital broadcast receiving terminal checks the content ID corresponding to the broadcast channel using the stored electronic service guide, checks the checked content ID with the content ID included in the received packet are the same, and provide content information corresponding to the broadcast channel. 7. The multimedia broadcast system as claimed in claim 5, wherein the digital broadcast receiving terminal checks the content ID corresponding to the current broadcast channel using the stored electronic service guide, checks the checked content ID with the content included in the received packet Whether the IDs are the same, if the checked content ID is different from the content ID included in the received package, check the content information corresponding to the content ID included in the received package using the electronic service guide, and submit the checked content information. 8. The multimedia broadcast system of claim 1, wherein the broadcast server transmits a broadcast content ID corresponding to broadcast content of each broadcast channel through a multimedia packet. 9. The multimedia broadcasting system as claimed in claim 8, wherein the digital broadcast receiving terminal checks the content ID corresponding to the broadcast channel using the previously stored electronic service guide, checks the checked content ID with the content included in the received packet Whether the IDs are the same, when the checked content ID is the same as the content ID included in the received packet, content information corresponding to the currently selected broadcast channel is provided. 10. The multimedia broadcasting system as claimed in claim 8, wherein the digital broadcast receiving terminal checks the content ID corresponding to the broadcast channel using the previously stored electronic service guide, checks the checked content ID with the content included in the received packet Whether the IDs are the same, when the checked content ID is different from the content ID included in the received package, content information corresponding to the content ID included in the received package is checked using the electronic service guide, and the checked content information is provided. 11. A method of providing broadcast content in a multimedia broadcast system including a broadcast server and a digital broadcast receiving terminal, the method comprising: In the first step, the broadcast server broadcasts a packet, which includes a broadcast content ID corresponding to the currently broadcast broadcast content for each broadcast channel; In the second step, when the broadcast channel is selected, the digital broadcast receiving terminal receives the packet through the broadcast channel; and In a third step, the digital broadcast receiving terminal checks content information corresponding to the content ID included in the received packet using previously stored broadcast schedule information to check received broadcast content. 12. The method as claimed in claim 11, wherein the first step comprises: the broadcast server transmitting the broadcast content ID through a package different from a multimedia package for providing the broadcast content of each broadcast channel, the broadcast content ID being the same as The broadcast content of each broadcast channel currently broadcasting corresponds accordingly. 13. The method according to claim 11 , further comprising: before the first step, the broadcast server transmits reception information about a new session for the broadcast package through the electronic service guide, the reception information including content corresponding to the broadcast channel ID. 14. The method of claim 13, wherein the reception information on the new session for the broadcast package including the content ID corresponding to the broadcast channel is transmitted through a session description protocol file of the electronic service guide. 15. The method of claim 14, further comprising: The digital broadcast receiving terminal receives and stores the electronic service guide; and Reception information for receiving content information corresponding to the selected broadcast channel is checked through the session description protocol file, a packet is received using the checked reception information, and a content ID included in the received packet is checked. 16. The method of claim 15, wherein the third step comprises: The digital broadcast receiving terminal checks the content ID corresponding to the currently selected broadcast channel using the stored electronic service guide; checking whether the checked content ID is the same as the content ID included in the received packet; and Content information corresponding to broadcast channels is provided. 17. The method of claim 16, further comprising: If the checked content ID is different from the content ID included in the received package, content information corresponding to the content ID included in the received package is checked using the electronic service guide, and the checked content information is provided. 18. The method of claim 11, wherein the first step comprises: the broadcast server transmitting a broadcast content ID corresponding to broadcast content currently broadcast by each broadcast channel through a multimedia packet. 19. The method of claim 18, wherein the third step comprises: The digital broadcast receiving terminal checks the content ID corresponding to the broadcast channel using the previously stored electronic service guide; checking whether the checked content ID is the same as the content ID included in the received packet; and When the checked content ID is the same as the content ID included in the received packet, content information corresponding to the currently selected broadcast channel is provided. 20. The method of claim 19, further comprising: if the checked content ID is different from the content ID included in the received package, checking content information corresponding to the content ID included in the received package using an electronic service guide , and provide information about the content of the check. 21. A multimedia broadcasting system comprising: a broadcast server broadcasting a broadcast content ID corresponding to currently broadcast broadcast content for each broadcast channel; and The digital broadcast receiving terminal, when the broadcast content for retaining the record is selected, starts packet reception at the time point of the preset content search time before the broadcast start time of the selected broadcast content through the broadcast channel for broadcasting the selected broadcast content, It is checked whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which the reserved record is set, and only the received content ID including the same content ID as the content ID corresponding to the broadcast content for which the reserved record is set is recorded. Packet of multimedia data. 22. The multimedia broadcast system as claimed in claim 21, wherein the broadcast receiving terminal comprises: a memory unit for storing, in units of time, a broadcast schedule including information on broadcast contents provided for each broadcast channel, a content search time for starting packet reception through the broadcast channel at a time point of a preset content search time before a broadcast start time of the selected broadcast content; broadcast receiver for receiving packets sent via the selected broadcast channel; a content ID checking unit for checking the content ID included in the received packet; and The controller, when selecting broadcast content for reserved recording, controls to start packet reception by the broadcast receiver at a time point of a preset content search time before a broadcast start time of the selected broadcast content, and when included in the received packet When the content ID of is the same as the content ID corresponding to the broadcast content for which reserved recording is set, recording is started. 23. The multimedia broadcasting system as claimed in claim 22, wherein, when the content ID included in the received packet is different from the content ID corresponding to the broadcast content with the reserved record set, the controller continues to check the whether the content ID in the packet received by the receiver is the same as the content ID corresponding to the broadcast content for which the reserved record is set. 24. The multimedia broadcasting system as claimed in claim 22, wherein the controller checks during recording whether the content ID included in the received packet is identical to the content ID corresponding to the broadcast content for which the reserved recording is set, and when the content ID is mutually When they are the same, the recording is continued, and when the content IDs are different from each other, it is checked whether the content ID included in the received packet exists in the broadcast schedule, and when the content ID exists in the broadcast schedule, the recording is terminated. 25. The multimedia broadcasting system as claimed in claim 24, wherein, when the content ID does not exist in the broadcast schedule, the controller suspends the recording, and in the recording suspension state, checks whether the content ID included in the received packet is consistent with Corresponding to whether or not the content IDs of the broadcast contents for which reserved recording is set are identical, and when the content IDs are identical to each other, the subsequent recording is performed by re-subsequent recording from the end of the paused section. 26. The multimedia broadcasting system as claimed in claim 25, wherein, in the recording pause state, the controller checks whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which the reserved recording is set, and When the content IDs are different from each other, it is checked whether the content ID included in the received packet exists in the broadcast schedule, and when the content ID included in the received packet exists in the broadcast schedule, recording is terminated. 27. The multimedia broadcasting system as claimed in claim 26, wherein, in the recording pause state, the controller checks whether the content ID included in the received packet exists in the broadcast schedule, and when the content ID does not exist in the broadcast time In the table, when the broadcast end time of the selected broadcast content is exceeded and the recording pause maximum time is exceeded, the recording is terminated. 28. A method for retaining and recording broadcast content by a digital broadcast receiving terminal in a multimedia broadcast system comprising a broadcast server and a digital broadcast receiving terminal, the method comprising: The broadcast server broadcasts a packet, the packet including a broadcast content ID corresponding to the currently broadcast broadcast content for each broadcast channel; When the broadcast content for recording retention is selected, the digital broadcast receiving terminal starts packet reception at a time point of a preset content search time before a broadcast start time of the selected broadcast content through a broadcast channel for broadcasting the selected broadcast content; and The digital broadcast receiving terminal analyzes the content ID included in the received packet and records only the multimedia data of the received packet including the same content ID as the content ID corresponding to the broadcast content for which reserved recording is set. 29. The method according to claim 28, further comprising: the digital broadcast receiving terminal stores a broadcast schedule, a content search time, and a record pause maximum time in units of time, the broadcast schedule includes information on providing Information of the broadcast content, the content search time is used to start packet reception through the broadcast channel at a time point of the preset content search time before the broadcast start time of the selected broadcast content. 30. The method of claim 29, wherein the recording step comprises: analyze the content ID included in the received packet; checking whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which the reserved record is set; and Recording is started when the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which reserved recording is set. 31. The method of claim 30, further comprising: when the content ID included in the received packet is different from the content ID corresponding to the broadcast content for which the reservation record is set, continuing to check when the received packet is included The content ID of is the same as the content ID corresponding to the broadcast content for which the reservation record is set. 32. The method of claim 31 , further comprising: checking during recording whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which reserved recording is set; When the content ID included in the received packet is different from the content ID corresponding to the broadcast content for which the reservation record is set, continue recording when the content ID included in the received packet is different from the content ID corresponding to the broadcast content for which the reservation record is set The content ID is the same, and it is checked whether the content ID included in the received packet exists in the broadcast schedule; and When the content ID exists in the broadcast schedule, the recording is terminated. 33. The method of claim 32, further comprising: suspending recording when the content ID included in the received packet does not exist in the broadcast schedule; In the recording pause state, it is checked whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which reserved recording is set; and When the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which reserved recording is set, subsequent recording is performed by re-subsequent recording from the end of the paused section. 34. The method as claimed in claim 33 , further comprising: in the recording pause state, checking whether the content ID included in the received packet is the same as the content ID corresponding to the broadcast content for which the reserved recording is set, and if the content ID different from each other, it is checked whether the content ID included in the received packet exists in the broadcast schedule; and When the content ID included in the received packet exists in the broadcast schedule, the recording is terminated. 35. The method as claimed in claim 34, further comprising: in the recording pause state, checking whether the content ID included in the received packet exists in the broadcast schedule, and when the content ID included in the received packet does not Existing in the broadcast schedule, when the broadcast end time of the broadcast content for which record retention is set is exceeded, and the recording pause maximum time is exceeded, the recording is terminated.

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