KR20080064505A - Digital broadcasting signal and apparatus and method of processing the signal - Google Patents

Abstract

A digital broadcasting signal and an apparatus for processing the same and a method thereof are provided to easily recognize a receiving limit channel by obtaining information regarding the receiving limit channel by a user. A digital broadcasting apparatus includes a tuner(400), a CI(Common Interface) processing unit(410), a system decoder(420), an SI(Service Information) unit(430), a UI (User Interface) unit(440), a channel manager(450), an AV decoder(460), an AV processor(470), and a display unit(480). The tuner receives a digital broadcasting signal. The CI processing unit separates AV data and PSI/SI data from the digital broadcasting signal. The UI unit manages all kinds of information regarding a receiving limit system and provides information such as a valid use period of the receiving limit system to a user. The system decoder decodes the PSI/SI data. The SI unit parses the PSI/SI data. The display unit display information regarding the receiving limit channel.

Description

Digital broadcasting signal and apparatus and method for processing the signal

1 is a diagram illustrating syntax of "CA_identifier_descriptor"

2 is a diagram illustrating an example of syntax of "CA_identifier_descriptor" including reception restriction channel information according to an embodiment of the present invention.

3 is a diagram illustrating an example of syntax of "CA_ch_info_descriptor" including reception restriction channel information according to an embodiment of the present invention.

4 is a block diagram illustrating an example of a receiver for processing a digital broadcast signal including restricted channel information according to an embodiment of the present invention.

5 is a diagram illustrating an example of a screen displaying information on a reception restriction channel according to an embodiment of the present invention.

6 is a flowchart illustrating a process of processing reception restriction channel information included in "CA_identifier_descriptor" according to an embodiment of the present invention.

7 is a flowchart illustrating a process of processing restricted channel information included in "CA_ch_info_descriptor" according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

400: tuner 410: CI processing unit

420: system decoder 430: SI unit

440: UI unit 450: Channel Manager

460: AV decoder 470: AV processor

480: display unit

The present invention relates to a digital broadcast signal and an apparatus and method for processing the signal, and more particularly, to a digital broadcast signal and a method and apparatus for processing the signal including the reception restriction channel information.

Users have experienced superiority of HD (High Definition) video and digital sound due to the development of Digital Broadcasting technology, and the better environment is being developed through the continuous development of compression algorithms and high performance of hardware. Will be.

A digital television (DTV) may receive a digital broadcast signal and provide various additional services in addition to video and audio to a user.

Such digital broadcasting may be classified into broadcasts to which reception restrictions are applied, such as paid broadcasts, and broadcasts to which reception restrictions are not applied, such as free broadcasts. You can watch it.

In the case of a restricted channel such as pay-TV, a broadcast signal scrambled by a conditional access system (CAS) is provided to the viewer, and only the subscriber who pays for subscription descrambles the broadcast signal. (descramble) to watch the broadcast.

Therefore, a viewer who does not subscribe to the restricted channel service cannot watch a broadcast program, and no content is displayed on the screen for the channel. That is, the viewer who does not subscribe to the restricted channel service did not know any information about the restricted channel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a digital broadcast signal including a reception restriction channel information and an apparatus and method for processing the broadcasting signal, thereby providing information on a reception restriction channel to a user. To provide.

An example of a digital broadcast signal according to the present invention for achieving the above object, the broadcast signal is a table related to the configuration of the bucket (Bouquet), a table about the information of the event, a table of the description of the service (service) Or at least one table of events included in the partial TS and tables of information of the service, the table relating to the configuration of the bucket, a table of information of the event, a table relating to the description of the service, or an event included in the partial TS. And information on the reception restriction channel in at least one table of the information about the service information.

An example of a method of processing a digital broadcast signal according to the present invention includes: demultiplexing a received broadcast signal and filtering a section of a table including information on a reception restriction channel; parsing the filtered section And displaying the reception restriction channel information screen by using the information on the reception restriction channel extracted in the parsing step.

An example of an apparatus for processing a digital broadcast signal according to the present invention includes a CI processor for demultiplexing and descrambled a received broadcast signal, a system decoder for decoding service information data demultiplexed in the CI processor, and the decoded data. And a service information unit for parsing service information data and extracting information on the reception restriction channel, and a user interface controlling to display the information on the reception restriction channel on the screen.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

In addition, the terms used in the present invention was selected as a general term widely used as possible now, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the corresponding description of the invention, It is to be clear that the present invention is to be understood as the meaning of terms rather than names.

The digital broadcast signal and the operation of the method and apparatus for processing the signal according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

The present invention relates to a digital broadcast signal and a method and apparatus for processing the signal. The broadcast signal may include information on a reception restriction channel in a standard for transmitting broadcast information of a system.

In the present invention, a broadcast information delivery standard SI (Service Information) of digital video broadcasting (DVB), which is a digital broadcasting standard, will be described as an example. Another digital broadcasting standard, ATSC (Advanced Television System Committee), may be applied to PSIP (Program and System Information Protocol), which is a broadcasting information delivery standard.

The transmitter may encode and transmit the SI in MPEG-2 (Moving Picture Experts Group-2) format, and the receiver may receive and parse the SI to provide various information about the program.

Therefore, the SI basically has a skeleton similar to the program and system information (PSI) of the MPEG system, and may be formed of a set of tables having the same purpose. Each table may be divided into several sections and transmitted.

In addition, the SI may provide additional information by including at least one descriptor in a table.

In order to include the reception restriction channel information in the SI, a table may be newly defined and defined, or may be defined as a reserved field or descriptor of a previously defined table.

Hereinafter, the present invention will be described with an example of defining a descriptor in an existing table for convenience of description.

Hereinafter, the present invention will be described by dividing (1) a digital broadcast signal including information on a reception restriction channel, (2) an apparatus for processing the broadcast signal, and (3) a method.

(1) Digital broadcast signal including information on restricted channel

The information on the reception restriction channel may be included in an existing descriptor and defined, or may be included in a new descriptor and defined. Hereinafter, both cases will be described.

1 is a diagram illustrating syntax of "CA_identifier_descriptor".

The "CA_identifier_descriptor" is a descriptor including information on whether the broadcast signal has been scrambled by the reception restriction system and information on the type of the reception restriction system applied to the broadcast signal.

The descriptor is a descriptor defined in the SI of the DVB, and is included in at least one table of a BU (Bouquet Association Table), a Service Description Table (SDT), an Event Information Table (EIT), or a Selection Information Table (SIT). (DVB standard ETSI EN 300 468)

Each field constituting the descriptor is described as follows. For the sake of simplicity and clarity, the English expression for each field constituting the syntax is used as it is, but double quotes will be given together.

"descriptor_tag" is a field for identifying the descriptor and has a value of 8 bits. The tag value of the descriptor is 0x53.

"descriptor_length" represents the total length (byte unit) of the following field.

"CA_system_id" is a field used to identify a reception restriction system and has a value of 16 bits. The value of this field is defined in ETR 162 [6].

The descriptor includes the above fields and does not include information on the reception restriction channel. According to an embodiment of the present invention, the descriptor may further include information on a reception restriction channel in the descriptor.

2 is a diagram illustrating an example of syntax of "CA_identifier_descriptor" including reception restriction channel information according to an embodiment of the present invention.

Hereinafter, a field indicating information of a reception restriction channel which is not described with reference to FIG. 1 will be described.

"ch_num" is a field having information on the channel number of the reception restriction channel and has a value of 10 bits.

"ch_name_length" represents the length of channel name information of the reception restriction channel. The field has a value of 8 bits.

"ch_name_char" includes the channel name of the reception restriction channel, and has a value of 8 bits.

"video_format" includes video format information about a program of the reception restriction channel.

An example of a field value corresponding to the video format may be expressed as shown in Table 1 below. The video format is a format based on a horizontal size of a video.

Field value Video format 0x00 720 0x01 544 0x02 480 0x03 352

"aspect_ratio" includes information of an aspect ratio of a program of the reception restriction channel. An example of a field value corresponding to the screen ratio may be expressed as shown in Table 2 below.

Field value Screen rain 0x00 4: 3 0x01 16: 9 0x02 2.21: 1

"audio_format" contains information of an audio format for a program of the reception restriction channel. An example of a field value corresponding to the audio format may be expressed as shown in Table 3 below.

Field value Audio format 0x00 single mono channel 0x01 dual mono channel 0x02 stereo 0x03 multi-lingual multi-audio, surround

"program_name_length" represents the length of program name information of the reception restriction channel. The field has a value of 8 bits.

"program_name_char" includes the program name of the reception restriction channel, and has a value of 8 bits.

"program_content_length" represents the length of program content information of the reception restriction channel. The field has a value of 8 bits.

"program_content_char" contains the program content of the reception restriction channel and has a value of 8 bits.

"program_start_time" includes program start time information of the reception limit channel, and "program_end_time" includes program end time information. The fields each have a value of 40 bits.

"parental_lock_value" includes audience rating information for the program of the reception restriction channel. The value of the field has the same format as the "rating" field value of "parental_rating_descriptor".

The "parentla_lock_value" field value may be expressed as shown in Table 4 below.

Field value description 0x00 undefined 0x01 to 0x0F minimum age = field value + 3 0x10 to 0xFF definde by the broadcaster

In addition to the above information, the descriptor may include information about a voice language of a restricted channel program, a caption language, information about a provider of the restricted channel service, and the like.

3 is a diagram illustrating an example of syntax of "CA_ch_info_descriptor" including reception restriction channel information according to an embodiment of the present invention.

The "CA_ch_info_descriptor" descriptor is a descriptor newly defined for transmission including information of a reception restriction channel.

The descriptor may be included in at least one table of a BU (Bouquet Association Table), a Service Description Table (SDT), an Event Information Table (EIT), or a Selection Information Table (SIT).

Each field constituting the descriptor is described as follows.

"descriptor_tag" is a field for identifying the descriptor and has a value of 8 bits. The tag value of the descriptor is assigned a new tag value so as not to overlap with the tag value of the existing descriptor.

"descriptor_length" represents the total length (byte unit) of the following field.

"CA_system_id" is a field used to identify a reception restriction system and has a value of 16 bits. The value of this field is defined in ETR 162 [6].

Hereinafter, each field indicating information on the reception restriction channel is the same as described with reference to FIG. 2.

In the above, an example of configuring a descriptor for information on a restricted channel according to the present invention has been described. In the context of the present invention, the descriptors of FIGS. 2 and 3 are examples, and each field constituting the descriptor is also an embodiment, and the present invention is not limited thereto. Therefore, the technical scope of the present invention should be determined based on the technical spirit that is revealed throughout the specification.

(2) a device for processing digital broadcast signals

4 is a block diagram illustrating an example of a receiver for processing a digital broadcast signal including restricted channel information according to an embodiment of the present invention. Hereinafter, a configuration of a digital broadcast receiver for receiving and processing a digital broadcast signal including the reception restriction channel information will be described with reference to FIG. 4.

The digital broadcast receiver for receiving and processing the digital broadcast signal includes a tuner 400, a CI processor 410, a system decoder 420, an SI unit 430, a UI unit 440, a channel manager 450, and an AV decoder. 460, an AV processor 470, and a display 480.

The tuner 400 receives a digital broadcast signal including a PSI / SI table. The received PSI / SI table may include a table including restricted channel information according to the present invention.

A demodulator (not shown) is responsible for receiving and demodulating a signal tuned by the tuner 400.

The common interface (CI) processor 410 separates the AV (Audio / Video) data and the PSI / SI data with respect to the received broadcast signal, and transmits them to the AV decoder 460 and the system decoder 420, respectively.

In this case, when the received broadcast signal is a broadcast signal of a reception restriction channel, the CI processor 410 transmits AV data to the AV decoder 460 only when the broadcast signal can be descrambled.

The CI processing unit 410 descrambles the broadcast signal when the identification information of the reception restriction system included in the broadcast signal and the reception restriction system of the receiver correspond to each other.

In addition, the CI processing unit 410 may determine various types of information about a CAM (Conditional Access Module), a smart card, an embedded CAS (CAD), etc. which can descramble the scrambled broadcast signal, and whether the received broadcast signal is descrambled. Common Interface (MMI) is transmitted to the UI (User Interface) unit 440 using a Man-Machine Interface (MMI).

The UI unit 440 manages various types of information on the reception restriction system, and provides the user with information such as the valid period of validity of the reception restriction system on request.

The system decoder 420 decodes the PSI / SI data received by the CI processing unit 410 and transmits the decoded PSI / SI data to the SI (Service Information) unit 430.

The SI unit 430 parses the PSI / SI data and stores and manages the parsed data.

The "CA_ch_info_descriptor" and "CA_identifier_descriptor" including the restricted channel information according to the present invention may be located in the BAT, SDT, EIT or SIT table.

The SI unit 430 may parse a Program Association Table (PAT) and a Program Map Table (PMT) to recognize a PID (Packet Identifier: PID) for the SDT, BAT, EIT, and SIT tables.

The SI unit 430 filters and parses a section including the SDT, BAT, EIT and SIT tables using the PID. The CA_identifier_descriptor or CA_ch_info_descriptor is included in at least one of the tables to obtain information on the reception restriction channel.

The SI unit 430 transmits information about each channel obtained from the parsed PSI / SI data to the channel manager 450.

Information on the reception restriction channel may be transmitted to the UI unit 440 through two paths.

Information on the reception restriction channel is transmitted from the SI unit 430 to the CI processing unit 410 and the reception processing channel together with information on the CAM, smart card, embedded CAS, etc. using the CI MMI in the CI processing unit 410. Transmits the information to the UI unit 440.

Alternatively, the SI unit 430 directly transmits information on the reception restriction channel to the UI unit 440.

The UI unit 440 processes to display the received reception restriction channel information on the screen. The UI unit 440 may display the reception restriction channel information on the screen using an OSD (On Screen Display).

When the broadcast signal received by the receiver is descrambled by the CI processing unit 410, the AV data included in the broadcast signal is processed through the AV decoder 460 and the AV processor 470 and then displayed on the display unit 480. Since the display, the UI unit 440 does not display the information on the reception restriction channel on the screen.

When the broadcast signal received by the receiver cannot be descrambled by the CI processor 410, the AV data included in the broadcast signal may not be transmitted to the AV decoder 460. Accordingly, the AV processor 470 receives OSD data on the restricted channel information from the UI unit 440, processes the image, and transmits the image to the display unit 480.

In this case, the display unit 480 does not display the broadcast program image, and displays information on the reception restriction channel.

5 is a diagram illustrating an example of a screen displaying information on a reception restriction channel according to an embodiment of the present invention.

If the received broadcast signal cannot be descrambled, the image of the broadcast program is not displayed, and a screen displaying information on the reception restriction channel as shown in FIG. 5 is displayed.

The screen includes various kinds of information on the reception restriction channel. The number on the upper left of the screen indicates the channel number, and 'CAS' on the upper right indicates that the channel is restricted.

Information about a program being broadcast on the reception restriction channel is displayed on the screen.

As shown in the example of FIG. 5, a channel name, a name of a program broadcast in the channel, a content of the program, a program start time and end time, a video format of the program, an audio format, an aspect ratio, and a rating are displayed on the screen.

In addition, in addition to the information on the reception restriction channel, a phrase, a guide phrase, information on a service provider, etc. may be displayed by adding a subscription.

(3) how to process digital broadcast signals

FIG. 6 is a flowchart illustrating a process of processing reception restriction channel information included in "CA_identifier_descriptor" according to an embodiment of the present invention. Hereinafter, a process according to the present invention will be described with reference to the accompanying drawings.

The receiver receives a broadcast signal and demodulates the received broadcast signal. In operation S600, the demodulated broadcast signal is demultiplexed to extract SI information.

If the PAT and PMT included in the SI information extracted in step S600 are parsed, PIDs for SDT, BAT, EIT and SIT tables can be known.

The PID is used to filter and parse sections containing the SDT, BAT, EIT and SIT tables. In operation S610, "CA_identifier_descriptor" included in at least one of the tables is extracted.

The CA_identifier_descriptor extracted in step S610 is parsed to obtain information on the reception restriction channel (S620).

In operation S630, it is determined whether the information on the reception restriction channel is image-processed and displayed on the screen. The determination is determined based on whether or not the received broadcast signal can be descrambled.

When the broadcast signal received by the receiver is descrambled, since the AV data included in the broadcast signal is processed and displayed on the display unit, the information on the restricted channel is not displayed on the screen.

In this case, the received broadcast signal is descrambled and displayed on the screen. If the user changes the channel and changes to another reception restriction channel, the channel starts again from the step S600.

When the broadcast signal received by the receiver cannot be descrambled, the AV data included in the broadcast signal cannot be processed and displayed. Therefore, the information on the reception restriction channel is image-processed (S640) and displayed on the display unit (S650).

In this case, the broadcast program image of the reception restriction channel is not displayed, and information on the reception restriction channel is displayed on the screen.

7 is a flowchart illustrating a process of processing reception restriction channel information included in "CA_ch_info_descriptor" according to an embodiment of the present invention.

The process of processing the restricted channel information included in the "CA_ch_info_descriptor" is similar to the process of processing the restricted channel information included in the "CA_identifier_descriptor" of FIG.

The receiver receives a broadcast signal and demodulates the received broadcast signal. The SI information is extracted by demultiplexing the demodulated broadcast signal (S700).

When the PAT and PMT included in the SI information extracted in step S700 are parsed, PIDs for SDT, BAT, EIT and SIT tables can be known.

The PID is used to filter and parse sections containing the SDT, BAT, EIT and SIT tables. In operation S710, the CA_ch_info_descriptor is included in at least one of the tables.

The CA_ch_info_descriptor extracted in step S710 is parsed to obtain information on the reception restriction channel (S720).

In operation S730, it is determined whether the information on the reception restriction channel is to be processed and displayed on the screen. The determination is determined based on whether or not the received broadcast signal is descrambled.

When the broadcast signal received by the receiver is descrambled, since the AV data included in the broadcast signal is processed and displayed on the display unit, the information on the restricted channel is not displayed on the screen.

In the above case, the received broadcast signal is descrambled and displayed on the screen. If the user changes the channel and changes to another reception restriction channel, the corresponding channel starts again from step S700.

When the broadcast signal received by the receiver cannot be descrambled, the AV data included in the broadcast signal cannot be processed and displayed. Therefore, the information on the reception restriction channel is image-processed (S740) and displayed on the display unit (S750).

In this case, the broadcast program image of the reception restriction channel is not displayed, and information on the reception restriction channel is displayed on the screen.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

According to the digital broadcast signal including the reception restriction channel information and the apparatus and method for processing the broadcasting signal according to the present invention as described above, there is an effect that can provide a user with various information on the reception restriction channel.

Therefore, the user can more easily recognize the reception restriction channel by obtaining the information on the reception restriction channel, and the service provider can induce the user to subscribe to the channel service by providing the information on the reception restriction channel to the user.

Claims (14)

A CI processor for demultiplexing service information data from the received broadcast signal; A system decoder for decoding the service information data demultiplexed by the CI processing unit; A service information unit for parsing the decoded service information data and extracting information on a reception restriction channel; And And a user interface for controlling to display the information on the reception restriction channel on the screen. The method of claim 1, The service information unit, And transmitting the information on the reception restriction channel to the CI processing unit, wherein the CI processing unit transmits the information on the reception restriction channel to a user interface using a CI MMI. The method of claim 1, The service information unit, And transmitting information on the reception restriction channel to a user interface. The method of claim 1, The CI processing unit, And descrambles the received broadcast signal by using the reception restriction channel identification information included in the received broadcast signal. The method of claim 4, wherein When the received broadcast signal is descrambled, the user interface unit causes the broadcast to be displayed on a screen. And if the received broadcast signal is not descrambled, the user interface unit controls information on the reception restriction channel to be displayed on a screen. The method of claim 1, The information on the reception restriction channel, Digital broadcast receiver, characterized in that included in at least one of the SDT, BAT, EIT or SIT table. The method of claim 1, The information on the reception restriction channel, At least one or more of a channel number, a channel name, a name of a program broadcast in the channel, a program content, a program start time and end time, a video format, an audio format, an aspect ratio, and a rating of a program. Digital broadcast receiver. Demultiplexing service information data from a received broadcast signal and filtering a section of a table including information on a reception restriction channel; Parsing the filtered section; And And displaying information on the reception restriction channel extracted in the parsing step. The method of claim 8, The table containing information on the reception restriction channel, And at least one of the SDT, BAT, EIT, and SIT tables. The method of claim 8, The information on the reception restriction channel, At least one or more of a channel number, a channel name, a name of a program broadcast in the channel, a program content, a program start time and end time, a video format, an audio format, an aspect ratio, and a rating of a program. Method of processing digital broadcast signal. The method of claim 8, Displaying information on the reception restriction channel, And if the received broadcast signal is not descrambled, displaying the information screen of the reception restriction channel. In a digital broadcast signal, The broadcast signal may include at least one of a table related to a bucket configuration, a table related to information of an event, a table related to a description of a service, or a table related to information on events and services included in a partial TS. Including tables, Including information on the reception restriction channel in at least one of the table on the configuration of the bucket, the table on the information of the event, the table on the description of the service, or the table on the information of the event and the service included in the partial TS. Digital broadcasting signal characterized in that. The method of claim 12, The table regarding the configuration of the bucket is a BU (Bouquet Association Table), the table of information of the event is an event information table (EIT), the table of the description of the service is a service description table (SDT), included in the partial TS And a table relating to the information of the event and the received service is a selection information table (SIT). The method of claim 12, The information on the reception restriction channel, At least one or more of a channel number, a channel name, a name of a program broadcast in the channel, a program content, a program start time and end time, a video format, an audio format, an aspect ratio, and a rating of a program. Digital broadcast signal.

Images