KR101599065B1 - Controlling method of digital broadcasting receiver - Google Patents

Abstract

According to another aspect of the present invention, there is provided a method of driving a digital broadcast receiver, comprising: tuning to a content browsing channel; Separating the content guide information and the link data from the broadcast signal of the content browsing channel; Outputting the content guide information together with a link mark; Receiving a pointing operation on the link mark; And accessing a location indicated by the link data.

MPEG, BMT, VOD, Event, Content, Link

Description

TECHNICAL FIELD [0001] The present invention relates to a control method for a digital broadcast receiver,

The present invention relates to a control method of a digital broadcast receiver for processing and outputting a digital broadcast signal.

The television broadcasting system is classified into an analog television broadcasting system and a digital television broadcasting system according to the transmission format of a television signal. Since an analog television broadcasting system transmits an analog type television signal as it is, it is affected by noise and it is difficult to reproduce the original image. On the other hand, a digital television broadcasting system transmits an analog television signal in a digital form, thereby minimizing the influence of noise and facilitating reproduction of the original image.

In accordance with the radical development of digital broadcasting technology and diversification of services, a digital broadcasting receiver such as a digital television and a set-top box has a function of receiving a digital broadcasting in addition to a basic function of receiving a digital broadcasting, And differentiated functions are needed.

Digital televisions are the most effective household electronic devices for reproducing multimedia data. Accordingly, in the case of a multifunctional digital television, not only the broadcast signal transmitted from the broadcasting station is reproduced, but also the multimedia contents delivered from the USB storage or the external multimedia device are reproduced and the multimedia contents transmitted through the network are recycled. For example, in the case of so-called IPTV, it is possible to access a specific site on the Internet, and download and reproduce a specific VOD from the site.

In image processing and storage applications, digital image data from a variety of sources (such as broadcast stations, multimedia devices, network sites, etc.) as described above are typically encoded to meet the requirements of known standard formats. One of the widely adopted standard methods is MPEG2 (Moving Picture Experts Group) image coding standard method (hereinafter referred to as "MPEG standard method"). The MPEG standard scheme is divided into the system coding section (ISO / IEC 13818-1, 1994. 6. 10) and the picture coding section (ISO / IEC 13818-2, 1995.1.20) Quot; MPEG picture standard method "). The image data encoded by the MPEG standard scheme typically takes the form of a packetized data stream that contains the data content of many program channels (e.g., channel 1 through channel 125). For example, the decoder must identify and combine each packet containing the selected program channel in order to decode the packetized data stream and recover the picture data content of the selected program channel for display.

The present invention is to provide a digital broadcasting receiver in which a viewer can conveniently select and reproduce multimedia contents.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

According to an aspect of the present invention, there is provided a communication packet structure including data packets for transmitting guidance information on a specific content; And a bibliographic information block for recording bibliographic information on the data packets, wherein the bibliographic information block comprises: a header for transmitting the specific content, Download  And a link descriptor indicating a specific content in a site or a content browsing channel that can be used.

Here, the link descriptor may include: Download  A field for recording an identification number that identifies the specific content in a site or a content browsing channel that can be played; A field for recording the name of the link descriptor or the specific content; And a field for recording the total length of the link descriptor.

Here, the specific content is VOD , And the guide information VOD , And the bibliographic information block ISO / IEC  According to specification PMT  Section.

According to another aspect of the present invention, there is provided a method of driving a digital broadcasting receiver, comprising: tuning to a content browsing channel; Separating the content guide information and the link data from the broadcast signal of the content browsing channel; Outputting the content guide information together with a link mark; Receiving a pointing operation on the link mark; And accessing a location indicated by the link data.

Here, the step of outputting the content guide information together with the link mark may sequentially output a notice movie for a plurality of VODs.

Here, the step of connecting to the location indicated by the link data may further include downloading a VOD for the announcement moving image displayed when the pointing operation is performed.

Here, in the step of downloading the VOD, a pop-up window for inquiring whether or not the VOD can be downloaded to the viewer can be displayed.

The step of separating the content guide information and the link data comprises: decoding a broadcast signal of MPEG2 format; And extracting the link data from the program characteristic information (PSI) of the decoded MPEG2 data.

Here, in the step of extracting the link data, a VOD link descriptor for the content may be retrieved from a Program Map Table (PMT).

Here, the browsing channel tuning step may be performed immediately after the digital broadcasting receiver is powered on.

Here, the viewer's response to the link mark may be a pointing operation on the output link mark, or a predetermined key input on the remote controller.

According to another aspect of the present invention, there is provided a method for transmitting a signal to a digital broadcasting receiver, the method comprising: receiving data packets for transmitting guidance information on a specific content; And a bibliographic information block for recording bibliographic information on the data packets, wherein the bibliographic information block includes at least one of a 'content browsing channel capable of downloading the specific content or a content browsing channel' And a link descriptor indicating the link descriptor.

By implementing the control method of the digital broadcast receiver of the present invention according to the above configuration, there is an advantage that a viewer can conveniently select and reproduce multimedia contents.

Alternatively, the present invention has an advantage of activating the production and trading of multimedia contents such as VOD.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments with reference to the accompanying drawings. An embodiment of the present invention applied to a process of reproducing a desired multimedia content in a digital broadcasting receiver that reproduces multimedia contents having the MPEG2 format will be described.

In addition, although the term used in the present invention is selected as a general term that is widely used at present, there is also a term arbitrarily selected by the applicant in a specific case. In this case, since the meanings are described in detail in the description of the corresponding invention, it is to be understood that the present invention should be grasped as meanings of terms which are not simply names of terms.

An MPEG-2 transport stream (TS) packet for transmitting audio and video information of a digital television broadcast is composed of a link layer header having a fixed length of 4 bytes and a link layer header having a variable length An adaptation header, and a payload having packetized elementary stream (PES) packets or program specific information (PSI).

Since the MPEG2 TS transmits a plurality of video and audio individual bit streams, it is necessary to select which program from among a plurality of programs, which packet is to be taken and how to decode it. That is, in the decoding of the MPEG2 TS, one of a plurality of programs must be selected and then the packet identification number (PID) of the transport packet of the individual bit stream necessary for decoding the program must be known. Then, the parameter information and linkage information of these individual bit streams must be known. For this multi-step operation, a program specific information (PSI) table is required as a plurality of pieces of additional information.

A PAT (Program Association Table) among the plurality of tables is special information transmitted by a packet having PID = 0. That is, the PAT describes the components of the program for each program number, and indicates the PID of the transport packet for transmitting the program map table (PMT).

The program map table (PMT) describes a program identification number and a PID list and associated information of a transport packet in which individual bit streams such as video and audio constituting a program are transmitted. That is, the role of the PMT is to map the individual PIDs to the required streams.

First, a structure of a digital broadcast receiver in which a method of driving a television according to an embodiment of the present invention is performed will be described.

1 shows a basic structure of a digital broadcast receiver. The digital broadcast receiver includes a tuner / channel decoder 210 for tuning a broadcast signal of a desired channel, A demultiplexer 220 for demultiplexing the selected broadcast signal; A video decoder (230) for decoding a video signal output from the demultiplexer; And an audio decoder 240 for decoding the audio signal output from the demultiplexer.

The transmitted MPEG2 transport stream (TS) packet data as shown in FIG. 1 is sent to the demultiplexer 220 through a series of processes such as demodulation and error processing in the tuner / channel decoder 210. The demultiplexer 220 analyzes the input MPEG2 transport stream (TS) packet and outputs audio and video elementary stream (ES) data. The demultiplexer 220 processes data in the decoders 230 and 240, (Monitor) and speaker (Speaker).

FIG. 2 shows the detailed structure of the demultiplexer 220 of FIG.

The demultiplexer shown in FIG. 2 includes a transport stream (TS) packet synchronization unit 10 for receiving an MPEG2 transport stream (TS) packet as input and performing synchronization, error processing, and program clock reference (PCR) analysis; A transport stream (TS) header processing unit (20) for interpreting audio and video transport stream (TS) packets to find packetized elementary stream (PES) packets; A program specific information (PSI) decoder 30 for parsing a program coordination table (PAT) and a program map table (PMT) to obtain a packet identifier (PID); And a Packetized Elementary Stream (PES) header processing unit 40 for performing operations of receiving audio and video packetized elementary streams (PES) as input and locating respective elementary stream (ES) data.

FIG. 3 shows the detailed structure of the program specific information (PSI) decoder 30 of FIG.

The program specific information (PSI) decoder 30 includes a program adjustment table (PAT) decoder 31, a program map table (PMT) decoder 32, a cyclic redundancy check (CRC) A checker 33, and a multiplexer (MUX).

The program coordination table (PAT) decoder 31 receives the PUSI signal, the TS packet data TS data, the program number signal, the valid signal TS Valid, ) Index, and a language code signal.

The program number signal means a channel number selected by a viewer from outside. The program number is a program number that is externally selected and matches a program number existing in the program adjustment table (PAT) table. Program Map Table (PMT) Locate the packet identifier (PID) and store it as a packet identifier (PID) register.

When the power of the apparatus is turned on, the program coordination table (PAT) information must first be analyzed among the transport stream (TS) packet data transmitted. Important program specific information (PSI) information, such as program coordination table (PAT) and program map table (PMT), can be sent in duplicate packets at the transmitter.

The program coordination table (PAT) includes a program coordination table (PAT) header analysis operation such as retrieving a program map table (PMT) packet identifier (PID) and retrieving a version number (Version Number) .

The program map table (PMT) decoder 32 analyzes the program map table (PMT) corresponding to an external program number and outputs a program clock reference (PCR) packet identifier (PID) (ES) packet identifier (PID).

When searching for an elementary stream (ES) packet identifier (PID), an audio elementary stream (ES) packet identifier (PID) includes a language code in Descriptor information, (PID) that match each other.

Since the program map table (PMT) is also very important information, the transmitter can send a duplicate packet like the program coordination table (PAT), and the program map table (PMT) decoder checks the version number in the table Remove this duplicate packet.

The CRC Checker 33 may check the table of program specific information (PSI), which is important information, with CRC-32, but may be omitted depending on the implementation.

FIG. 4 illustrates a method of driving a digital broadcast receiver according to an embodiment of the present invention.

The driving method includes: powering on a digital broadcasting receiver (S110); Tuning to a content browsing channel (S120); Separating the content guide information and the link information from the broadcast signal of the content browsing channel (S 130); Outputting the content guide information together with a link mark (S140); A step (S150) of waiting for a viewer's instruction on the link marking; A step (S160) of accessing a site indicated by the link data upon receipt of an instruction from a viewer; A step (S170) of downloading the content data guided by the content guide information; And reproducing the downloaded contents data (S180).

Hereinafter, detailed operation of each step will be described by embodying the content data as VOD (Video on Demand). In this case, the content browsing channel will be a VOD browsing channel.

The step S110 is for reflecting a business strategy of a broadcasting service related company such as IPTV, and may be omitted depending on the implementation. The step S110 may be performed in an implementation in which an initial channel is set to a VOD browsing channel when a viewer turns on a digital television or a set-top box.

The VOD browsing channel is a channel for advertising the VOD. The VOD browsing channel is for advertising or predicting VOD contents that a viewer can download. In the VOD browsing channel, the content guide information for each VOD content is broadcast on a predetermined time basis. For example, it is possible to broadcast trailer AV data of VOD contents in units of one minute.

The step S120 may be performed in substantially the same manner as a channel selection process of a general broadcast channel in a digital television tuner. That is, the step S110 may be performed in the tuner / channel decoder of FIG. The step S120 may be performed automatically after step S110, or may be performed according to the selection of the VOD browsing channel of the viewer.

The step S130 may be performed in the demodulator 220 of the digital broadcasting receiver of FIG. More specifically, the link information may be separated in a process of decoding a transport stream (TS) of the demodulator, or the link information may be separated in a process of decoding a PS (Program Stream) and an elementary stream (ES) have. In the following description, in the former case, for example, the link information is described in the program specifying information (PSI).

In this case, the step S130 may include decoding the broadcast signal in the MPEG2 format; And extracting the link data from the program characteristic information (PSI) of the decoded MPEG2 data.

The content guide information may be a trailer video for a VOD content to be displayed, and the link information may be a VOD link descriptor.

The VOD link descriptor is inserted into the program information descriptor portion of the PMT section as shown in Table 1 of the Inband Stream of the VOD browsing channel. One embodiment of the data structure of the VOD link descriptor is shown in Table 1 below.

The VOD link descriptor in Table 1 has three items of descriptor_tag, descriptor_length, and content_id. It can record the name of the link descriptor as descriptor_tag, record the length of the entire link descriptor as descriptor_length , and may record an identification number (e.g., a DCA Number) identifying the corresponding VOD in the download site and / or the content browsing channel as the content_id.

The form in which the VOD link descriptor of Table 1 is inserted into the PMT section is shown in Table 2 below. The PMT section of Table 2 below is a variation of the PMT section for the ISO / IEC 13818-1 MPEG2 System specification.

In step S140, the trailer video for the VOD content to be displayed is reproduced, and a link mark can be displayed together. The step S140 may be performed in the video decoder 230 of FIG. The link mark may be displayed in a corner portion of the screen in the form of a small icon, or may be displayed as an image overlapping with the trailer movie to be reproduced in a translucent manner. The link marking function notifies the viewer that the website on which the full version VOD content for the trailer video can be downloaded is hyperlinked (i.e., there is a VOD link descriptor).

In step S140, the digital television receives and reproduces a broadcast signal of the VOD browsing channel, and the VOD browsing channel sequentially broadcasts notification data for a plurality of VOD contents. As a result, the digital television can sequentially output preview data for a plurality of VOD contents to be previewed in the VOD browsing channel.

In step S150, an instruction of the viewer can be accepted as a pointing operation of the viewer for the link mark. The step S150 may be performed by a remote control receiver (not shown) of the digital broadcasting receiver.

For example, when a color key is displayed on the screen as the link mark and the viewer points the color key using a touch pad or a navigation key provided on a remote controller or the like, the digital broadcast receiver displays the VOD link descriptor Linked Descriptor) DCA Number of the VOD can be purchased directly through the window can be launched. The viewer can download and view the VOD according to the purchase procedure.

In step S160, the user can access the site having the IP address included in the link information acquired in step S130. The IP address may be an address of a web site from which the VOD of the content guide information can be purchased.

In step S170, the full version of the VOD data for the announcement data displayed when the pointing operation is performed on the link mark may be downloaded.

The step S170 may include: displaying a window asking the viewer for purchase of the VOD; And downloading the VOD contents when a purchase instruction is received from the viewer.

Steps S160 and S170 may be performed by an arithmetic unit (not shown) that executes an application of the digital broadcasting receiver.

In step S180, the screen of the television is changed to a state of reproducing the VOD in a state of displaying the VOD purchase site.

In the case of streaming broadcast having a DRM policy that does not permit storage of a file format in the digital broadcast receiver, steps S170 and S180 may be repeatedly performed on the streaming transmission unit data.

The step S180 may be performed by the video / audio decoders 230 and 240 of the digital broadcasting receiver of FIG.

5A shows a screen output form of a link mark according to an embodiment of the present invention. The illustrated television screen reproduces the trailer video for the VOD, and the link mark h1 shown in the figure generally has an icon shape for downloading.

The icon mark link h1 may be superimposed on the trailer movie or superimposed in a semi-transparent manner. In the figure, the link mark h1 is displayed on the lower right screen. However, in order to recommend the viewer's purchase, .

Then, a viewer who wants to purchase the VOD can point to the link mark h1 using a pointing reception device (e.g., a touch pad or a navigation key installed on a remote controller or the like) to issue a purchase procedure proceeding instruction.

5B shows a screen output form of a link mark according to another embodiment of the present invention. The illustrated television screen reproduces the trailer video for the VOD, and the link mark h2 shown therein includes text for informing the viewer of the download.

The link mark h2 including the text may be superimposed on the trailer moving image or may be superimposed with translucency, and the position of the link mark h2 may be variously applied. In addition, the viewer can issue a purchase procedure proceeding instruction in the same manner as in the case of FIG. 5A.

5C shows a screen output form of a link mark according to another embodiment of the present invention. The illustrated television screen reproduces the trailer video for the VOD, and the illustrated link mark m1 includes the remote controller shape and information for informing the viewer of buttons to be pressed by the viewer when instructing the download.

The link mark m1 may be superimposed on the trailer movie or superimposed with translucency, and the position of the link mark m1 may be variously applied. Then, a viewer who desires to purchase the VOD may issue a purchase procedure proceeding instruction for the VOD by pressing the remote control key indicated by the link marking m1.

FIG. 5D shows a screen output form of a link mark according to another embodiment of the present invention. The illustrated television screen reproduces the trailer video for the VOD, and the illustrated link mark m2 includes text for notifying the viewer of buttons to be pressed by the viewer when instructing the download.

The link mark m2 including the text may be superimposed on the trailer movie, or may be superimposed with translucency, and the representation position may be variously applied. In addition, the viewer can issue a purchase procedure proceeding instruction in the same manner as in the case of Fig. 5C.

FIG. 6 illustrates a state in which a digital television receiving an instruction to proceed with a purchase procedure according to one of FIGS. 5A to 5D is connected to a website for purchasing a corresponding VOD.

The viewer repeats the procedure of selecting and purchasing the VOD again on the web site and automatically selects the purchase of the VOD for the 'announcement data displayed when the pointing operation is performed' as shown in the figure, It is preferable that the pop-up window w1 for confirming the purchase according to the present invention is displayed.

The viewer's response to the inquiry of the pop-up window w1 is performed by a pointing operation using a pointing reception device (e.g., a touch pad or a navigation key installed on a remote controller or the like) or pressing the shown key (▶ key or? Key) .

If the viewer indicates No for the popup window w1, the purchase procedure for VOD is stopped, and if the viewer indicates Yes, the screen of Fig. 7 can be output.

In the screen of Fig. 7, a pop-up window w2 inquiring about whether or not to directly reproduce the VOD being purchased and being downloaded is generated. When the viewer indicates No for the pop-up window w2, the digital television performs an operation of downloading and storing the purchased VOD, and does not reproduce the downloaded VOD. On the other hand, if the viewer indicates Yes, the VOD being downloaded is immediately reproduced on the screen as shown in Fig.

Figure 9 shows a content distribution system for distributing multimedia content according to the principles of the present invention.

A provider server (400) for supplying contents created by a contents producer; A content storage server (100) for storing content to be distributed over a network; A digital broadcasting receiver (200) for downloading and reproducing contents from the contents storage server; And a distribution based system 300 forming a data communication channel between the content storage server 100 and the digital broadcast receiver 200.

The provider server 400 is a device for managing VODs produced by a manufacturer of a VOD for sale and uploading the VODs to the content storage server 100.

The content storage server 100 may be provided with a DMI (Distributed Management Interface) in order to provide the convenience of data communication related to the VOD to the VOD content producer or the VOD content consumer.

The distribution-based system 300 includes an integrated media control system (IMCS) 320, a content delivery network (CDN) 340, and an IP network 360 for managing content creation and distribution can do.

The digital broadcast receiver 200 may include an IP set-top box capable of identifying itself with an IP address. The IP set-top box serves as a receiver for a kind of digital broadcasting signal, and the form can be independent from the television or can be built-in.

It is to be noted that the technical idea of the present invention has been specifically described in accordance with the above preferred embodiment, but the above-mentioned embodiments are intended to be illustrative and not restrictive. In addition, it will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention.

1 is a block diagram illustrating a structure of a digital broadcasting receiver to which an embodiment of the present invention can be applied.

FIG. 2 is a block diagram illustrating a detailed structure of a demodulator of the digital broadcast receiver of FIG. 1;

3 is a block diagram illustrating a detailed structure of a program specific information (PSI) decoder of the demodulator of FIG. 2;

4 is a flowchart illustrating a method of controlling a digital broadcast receiver according to an embodiment of the present invention.

Figures 5a to 5d are television screens illustrating the display of link markings according to the principles of the present invention.

FIG. 6 is a view showing a connection to a web site for distributing multimedia contents according to a viewer's response to a link mark. FIG.

7 is a television screen inquiring about whether or not the multimedia content to be downloaded is immediately reproduced.

8 is a television screen showing immediate playback of downloaded multimedia content;

9 is a configuration diagram showing a configuration of a content distribution system to which an embodiment of the present invention can be applied;

Claims (11)

A tuner for tuning a content browsing channel; A demultiplexer for separating the content guide information composed of moving pictures for previewing and the link information in the selected broadcast signal; A video decoder for decoding a video signal output from the demultiplexer; An audio decoder for decoding an audio signal output from the demultiplexer; And And a display unit for displaying the content guide information together with a link mark in which the link information is hyperlinked, The method according to claim 1, Wherein the link information includes a link descriptor indicating a specific content in a site or a content browsing channel on which specific information can be downloaded. 3. The method of claim 2, The link descriptor includes: A field for recording the name of the link descriptor or the specific content; A field for recording the total length of the link descriptor; And And a field for recording an identification number identifying the specific content on a site or a content browsing channel where the specific content can be downloaded. 3. The method of claim 2, The specific content is a VOD, Wherein the guide information is a notice movie for the VOD. Tuning to a content browsing channel; Separating content guide information composed of a moving image for preview in the broadcast signal of the content browsing channel and link information; Outputting the content guide information together with a link mark in which the link information is hyperlinked; Receiving a viewer ' s response to the link mark; And Connecting to a location indicated by the link information And controlling the digital broadcasting receiver. 6. The method of claim 5, And outputting the content guide information together with the link mark, A method of controlling a digital broadcast receiver that sequentially outputs announcement moving pictures for a plurality of VODs. The method according to claim 6, After linking to the location indicated by the link information, A step of downloading a VOD for a preview movie displayed when a pointing operation on the link mark is performed Further comprising the steps of: 8. The method of claim 7, In the step of downloading the VOD, And displaying a pop-up window asking the viewer whether the download of the VOD is acceptable or not. 6. The method of claim 5, Wherein the step of separating the content guide information and the link information comprises: Decoding a broadcast signal of MPEG2 format; And Extracting the link information from the program characteristic information (PSI) of the decoded MPEG2 data And controlling the digital broadcasting receiver. 10. The method of claim 9, In the step of extracting the link information, And searching for a VOD link descriptor for the content in a PMT (Program Map Table). 6. The method of claim 5, The link information includes a link descriptor indicating a specific content in a site or a content browsing channel from which specific information can be downloaded, The link descriptor includes: A field for recording the name of the link descriptor or the specific content; A field for recording the total length of the link descriptor; And And a field for recording an identification number identifying the specific content on a site or a content browse channel where the specific content can be downloaded.

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