KR102017693B1 - Broadcast receiver and method of processing broadcast signal in broadcast receiver - Google Patents

Abstract

A broadcast receiver and a broadcast signal processing method are disclosed. The broadcast receiver includes a first receiver for receiving a broadcast signal of a specific channel, a first broadcast signal processor for separating an audio / video stream from the received broadcast signal of a specific channel, processing the audio / video stream, and displaying the same on a first screen; A table information processor for separating a data stream and extracting table information from the separated data stream, a storage unit for storing the extracted table information, and obtaining a program start time of a preferred channel set by a user using the table information A preference channel processor, a second receiver which receives a broadcast signal of the preferred channel at the start time of the obtained program of the preferred channel, a program actual start time determiner that determines an actual start time of a program of the preferred channel, and the preference The received line at the actual start time of the program of the channel It may include a second broadcast signal processor for displaying the broadcast signal of the call channel on the second screen.

Description

Broadcast receiver and method of processing broadcast signal in broadcast receiver

The present invention relates to a broadcast receiver for receiving and displaying digital broadcast, and more particularly, to a broadcast receiver and a broadcast signal processing method for displaying a program of a preferred channel.

Dozens of channels are provided in digital television (DTV), which can output high-quality video and high-quality audio. This increases the viewer's choice of channels and at the same time makes the channel selection more complex. In order to solve this problem, a channel used mainly by the user is designated as a favorite channel through a channel editing function in all channels stored in the DTV.

That is, the user executes the favorite channel function through the remote control while watching digital broadcasting, displays the favorite channel list on the OSD (On screen display) screen, and selects one of the displayed favorite channel lists to display the current broadcast channel. Switch to your favorite channel.

FIG. 1 is a block diagram illustrating a conventional broadcast receiver, in which a tuner 101 tunes a broadcast signal of a specific channel and outputs the same to a demodulator 102. The demodulator 102 demodulates a broadcast signal of a specific channel output from the tuner 101 and then outputs it to the demultiplexer 103 in the form of a transport stream (TS). In this case, video, audio, data, and the like are multiplexed to the TS output from the demodulator 102. The TS has a TS packet structure in units of 188 bytes, and the TS packet is composed of a header and a payload. The header includes information related to the payload, and the payload includes one of a video, audio and data stream.

The demultiplexer 103 distinguishes whether the stream included in the payload is a video stream, an audio stream, or a data stream by using a packet identifier (PID) included in a header of the TS packet. The separated audio and video streams are output to an audio / video decoder 107 and the separated data streams are output to a section filter 104.

In this case, a plurality of TS packets including a data stream are gathered to form a section, and one or more sections are gathered to form a table. Whether a table consists of one section or a plurality of sections can be known through a table_id field, a section_number field, and a last_section_number field in the corresponding table.

The section filter 104 determines whether to pass the input data stream using a version number or the like, and the data stream passing through the section filter 104, that is, the section data is output to the data decoder 105. . The purpose of the section filter 104 is to prevent duplicate reception of the same data. For example, the section filter 104 outputs the currently input section data to the data decoder 105 to reduce unnecessary processing and time, if the same section data as the input section data is already stored in the storage unit 106. Throw it away.

The data decoder 105 parses the input section data to construct a table, extracts information included in the configured table, and makes a database in the storage unit 106.

Meanwhile, the audio / video decoder 107 decodes the audio stream and the video stream through each algorithm and outputs the decoded audio stream to the display unit 108. The display unit 108 provides a decoded video stream as a screen and a decoded audio stream as a speaker.

At this time, the preferred channel information processing unit 109 acquires the preferred channel information set by the user using the information stored in the storage unit 106 and outputs it to the display unit 108. The display unit 108 displays the favorite channel information on an OSD screen. The preferred channel information may be a preferred channel list or program information included in the preferred channel.

However, there is a problem in that it is not possible to inform the user exactly what the contents of the program are by the preference channel information alone. In addition, even if the channel is switched to the preferred channel at the program start time included in the preferred channel information, since a few minutes of commercials are broadcasted first, there is a problem in that the channel is not accurately changed at the program start time.

The present invention is to solve the above problems, an object of the present invention is to provide a program through the second screen at the actual start time of the program of the preferred channel, the broadcast receiver and broadcast to inform the user exactly the program content Signal processing method.

It is another object of the present invention to provide a broadcast receiver and a broadcast signal processing method for informing a user of a program content accurately by providing the program in a pop-up form on a second screen at an actual start time of a program of a preferred channel.

A broadcast receiver according to the present invention for achieving the above object, the first receiver for receiving a broadcast signal of a specific channel; A first broadcast signal processor for separating and processing an audio / video stream from the received broadcast signal of the specific channel and displaying the same on a first screen; A table information processor for separating a data stream from the broadcast signal and extracting table information from the separated data stream; A storage unit which stores the extracted table information; A preference channel processor configured to acquire a program start time of a preference channel set by a user using the table information; A second receiver configured to receive a broadcast signal of the preferred channel at a start time of the acquired program of the preferred channel; A program actual start time determiner that determines an actual start time of a program of the preferred channel; And a second broadcast signal processor for displaying a broadcast signal of the received preferred channel on a second screen at an actual start time of a program of the preferred channel.

According to an embodiment of the present invention, the preferred channel processor acquires a start time of a program of the preferred channel from the event information table (EIT) of the table information.

According to an embodiment of the present invention, the program actual start time determiner determines an actual start time of a program of the preferred channel through automatic content recognition (ACR).

A broadcast signal processing method in a broadcast receiver according to the present invention includes the steps of receiving a broadcast signal of a specific channel; Separating and processing an audio / video stream from the broadcast signal of the received specific channel and displaying the same on a first screen; Separating a data stream from the broadcast signal, extracting table information from the separated data stream, and storing the table information in a storage unit; Acquiring a program start time of a preferred channel set by a user using the table information; Receiving a broadcast signal of the preferred channel at the start time of the program of the obtained preferred channel; Determining an actual start time of a program of the preferred channel; And displaying a broadcast signal of the received preferred channel on the second screen at the actual start time of the program of the preferred channel.

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 the present invention, after receiving the broadcast signal of the preferred channel at the start time of the program of the preferred channel obtained from the table information, confirming the actual start time of the program of the preferred channel, the received at the actual start time of the confirmed program By displaying the broadcast signal of the preferred channel in a pop-up form on the sub-screen, the user can know exactly what the contents of the program are. In addition, the channel can be switched to the program of the preferred channel without watching a commercial or the like that the user does not want.

1 is a block diagram showing an embodiment of a conventional broadcast receiver
2 is a block diagram showing an embodiment of a broadcast receiver according to the present invention;
3 is a flowchart illustrating an embodiment of an image display method according to the present invention.
4 is a flowchart illustrating an embodiment of a method for determining an actual start time of a program of a preferred channel according to the present invention.
5 is a flowchart illustrating another embodiment of a method for determining an actual start time of a program of a preferred channel according to the present invention.
6A to 6C illustrate examples of first and second screens for displaying a program of a preferred channel according to the present invention.
7 is a flowchart illustrating another embodiment of an image display method according to the present invention.
8A to 8D show other examples of the first and second screens for displaying a program of a preferred channel according to the present invention.

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

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

In addition, specific structural to functional descriptions of embodiments according to the inventive concept disclosed herein are only illustrated for the purpose of describing the embodiments according to the inventive concept, and according to the inventive concept. These may be embodied in various forms and should not be construed as limited to the embodiments set forth herein.

Embodiments according to the inventive concept may be variously modified and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In the present invention, terms such as first and / or second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another, for example, without departing from the scope of rights in accordance with the inventive concept, and the first component may be called a second component and similarly The second component may also be referred to as the first component.

The present invention is to display the program in a pop-up form on the second screen at the actual start time of each program of the preferred channel. In the present invention, the actual start time of each program of the preferred channel is determined by using an Auto Contents Recognition (ACR) method.

According to an embodiment of the present invention, if the first screen is the main screen, the second screen is the subscreen. That is, if the broadcast receiver has a simultaneous screen function, the channel currently being viewed may be displayed as the main screen and the preferred channel may be displayed as the sub-screen.

The simultaneous picture function is a function of dividing one screen into a main screen and one or more sub-screens to display independent images, and includes a picture in picture (PIP), a picture out picture (POP), a double window (or a twin picture), and the like. There is this. The PIP means that one or more sub-screens are displayed in the main screen, and the POP means that one or more sub-screens are displayed on the left (or right) side of the main screen. In addition, a double window means splitting one screen into left and right screens, displaying a main screen image on the divided left screen, and a subscreen image on the right screen. In this case, the size of the left and right screens may or may not be the same.

2 is a block diagram illustrating an embodiment of a broadcast receiver according to the present invention, and includes a first tuner 201, a first demodulator 202, a first demultiplexer 203, and a first section filter 204. ), A first data decoder 205, a first storage unit 206, an audio / video decoder 207, a first screen display unit 208, a preferred channel monitoring unit 209, a preferred channel tuning control unit 210. , Second tuner 251, second demodulator 252, second demultiplexer 253, second section filter 254, second data decoder 255, video decoder 257, second storage The unit 258 may include a program actual start time determiner 259 and a second screen display 260. For convenience of description, the present invention is called a first receiver including the first tuner 201 and the first demodulator 202, and includes a first demultiplexer 203, an audio / video decoder 207, and a first receiver. A first broadcast signal processing unit including a one screen display unit 208 is called, and includes a first demultiplexer 203, a first section filter 204, and a first data decoder 205 to process table information. It will be called a bur. In addition, the preferred channel monitoring unit 209 and the preferred channel tuning control unit 210 will be referred to as a preferred channel processing unit. In addition, a second receiver including the second tuner 251 and the second demodulator 252 is called a second demultiplexer 253, a video decoder 257, a second storage 258, and The second screen display unit 260 will be referred to as a second broadcast signal processor.

The first tuner 201 tunes a broadcast signal of a specific channel and outputs the tuned signal to the demodulator 202. The first demodulator 202 demodulates a broadcast signal of a specific channel output from the first tuner 201 and outputs the demodulated signal to the first demultiplexer 203 in the form of TS. In this case, video, audio, data, and the like are multiplexed in the TS output from the first demodulator 202.

The first demultiplexer 203 uses the packet identifier (PID) included in the header of the TS packet constituting the TS to determine whether the stream included in the payload of the TS packet is a video stream, an audio stream, or a data stream. Distinguish between cognition. The separated audio and video streams are output to an audio / video decoder 207, and the separated data streams are output to a first section filter 204.

In this case, a plurality of TS packets including a data stream are gathered to form a section, and one or more sections are gathered to form a table. Whether a table consists of one section or a plurality of sections can be known through a table_id field, a section_number field, and a last_section_number field in the corresponding table.

According to an embodiment of the present invention, the table may be one of tables included in PSI / PSIP (Program Specific Information / Program and System Information Protocol).

The PSI is a system standard of MPEG-2 defined for classifying channels and programs, and the PSIP is an Advanced Television Systems Committee (ATSC) standard for classifying channels and programs.

The PSI may include, as an embodiment, a Program Association Table (PAT), a Conditional Access Table (CAT), a Program Map Table (PMT), and a Network Information Table (NIT). The PAT is special information transmitted by a packet having a PID of '0', and transmits PID information of a corresponding PMT and PID information of a NIT for each program. The CAT transmits information about the pay broadcasting system used on the transmitting side. The PMT transmits PID information of a transport stream packet to which a program identification number, individual bit strings such as video and audio constituting the program are transmitted, and PID information to which a PCR is delivered. The NIT transmits information of an actual transmission network.

The PSIP is, according to an embodiment, a virtual channel table (VCT), a system time table (STT), a rating region table (RTT), an extended text table (ETT), a direct channel change table (DCCT), and a direct channel change selection (DCCSCT). A code table, an event information table (EIT), and a master guide table (MGT) may be included.

The first section filter 204 determines whether to pass the input data stream using a version number, etc., and the data stream passing through the first section filter 204, that is, the section data, is the first data decoder. It is output to 205. The purpose of the first section filter 204 is to prevent duplicate reception of the same data. For example, if the same section data as the input section data is already stored in the first storage unit 206, the first section filter 104 may use the first input section data as the first data to reduce unnecessary processing and time. It does not output to the decoder 205 and discards it.

The first data decoder 205 constructs a table using a table_id field and a section_length field included in the input section data, and parses the information included in the configured table into a database in the first storage unit 206.

The audio / video decoder 207 decodes the audio stream and the video stream through respective algorithms and outputs the decoded audio stream to the first screen display 108. The first display unit 108 provides the decoded video stream to the first screen and the decoded audio stream to the speaker. Here, the first screen may be a full screen or may be a main screen among simultaneous screens.

The algorithm for decoding the audio stream includes an AC-3 decoding algorithm, an MPEG 2 audio decoding algorithm, an MPEG 4 audio decoding algorithm, an AAC decoding algorithm, an AAC + decoding algorithm, a HE AAC decoding algorithm, an AAC SBR decoding algorithm, an MPEG surround decoding algorithm, It may be at least one of the BSAC decoding algorithms. The algorithm for decoding the video stream may be at least one of an MPEG 2 video decoding algorithm, an MPEG 4 video decoding algorithm, an H.264 decoding algorithm, an SVC decoding algorithm, and a VC-1 decoding algorithm.

Meanwhile, the preferred channel monitoring unit 209 monitors the first storage unit 206 to check the start time of each program included in the preferred channel. In this embodiment, the preferred channel is set by the user and stored in the first storage unit 206. In an embodiment, the start time of each program included in the preferred channel is extracted from the information included in the EIT. However, the start time of each program extracted from the EIT may not be the actual time of the program. That is, if the channel is switched at the start time of the program extracted from the EIT, the commercial program of the program is broadcast for several minutes and then the actual program is started.

Therefore, the present invention tunes the preferred channel through the second tuner 251 at the start time of the specific program of the preferred channel extracted from the EIT, checks the actual start time of the program through the ACR, and then starts the actual start time of the program. According to an embodiment of the present invention, the program is displayed on the second screen.

To this end, the preferred channel monitoring unit 209 outputs start time information of a specific program in the preferred channel to the preferred channel tuning control unit 210, and the preferred channel tuning control unit 210 tunes the second tuner to tune the preferred channel. Control 251.

The broadcast signal of the preferred channel tuned by the second tuner 251 is output to the second demodulator 252. The second demodulator 252 demodulates the broadcast signal of the preferred channel output from the second tuner 251 and outputs the demodulated signal to the second demultiplexer 253 in the form of TS. In this case, video, audio, data, and the like are multiplexed in the TS output from the second demodulator 252.

The second demultiplexer 253 uses the packet identifier (PID) included in the header of the TS packet constituting the TS to determine whether the stream included in the payload of the TS packet is a video stream, an audio stream, or a data stream. Distinguish between cognition. The separated video stream is output to the video decoder 257, and the separated data stream is output to the second section filter 254.

The second section filter 254 determines whether to pass the input data stream using a version number, etc., and the data stream passing through the second section filter 254, that is, the section data, is a second data decoder. Is output as (255).

The second data decoder 255 composes a table using the table_id field and the section_length field included in the input section data, and parses the information included in the configured table into a database in the first storage unit 206.

The video decoder 257 decodes an input video stream by applying at least one of the above-described video algorithms and stores the input video stream in the second storage unit 258. In this embodiment, the video decoder 257 processes the decoded video signal according to the second screen and temporarily stores the decoded video signal in the second storage unit 258. The second storage unit 258 may be configured separately from the first storage unit 206, and may be used as the second storage unit 258 by allocating some space of the first storage unit 206. It may be.

The program actual start time determiner 259 determines an actual start time of a program to be displayed on the second screen by using the ACR method. If the actual start time of the program is determined, the video stream stored in the second storage unit 258 is output to the second screen display unit 260. The second screen display 260 displays the input video stream on the second screen.

That is, the program of the preferred channel is displayed on the second screen only after the actual start time of the program is determined by the program actual start time determiner 259.

The present invention will be described as an embodiment of displaying the program of the preferred channel through the PIP of the simultaneous screen. That is, the second screen is a sub screen displayed by PIP.

In this embodiment, the second screen is displayed only for a predetermined time and then disappears. That is, the second screen plays the same role as the pop-up window.

In other words, when the actual start time of each program included in the favorite channel is reached, the program is displayed for a predetermined time using the PIP and the PIP screen is closed.

As such, by displaying the program as a video through the PIP at the actual start time of each program included in the favorite channel, the user can know exactly which program starts in the favorite channel.

In addition, according to an embodiment of the present invention, when a program of a preferred channel displayed through a PIP is selected through main / sub picture switching, PIP screen selection, and the like for a predetermined time, the program of the preferred channel is converted into a main screen and displayed.

3 is a flowchart illustrating an image display method according to an embodiment of the present invention, in which a start time of each program of a favorite channel is extracted using EIT information (S301).

When the start time of the specific program of the preferred channel extracted in step S301 is reached (S302), the second tuner 251 is controlled to receive a broadcast signal of the preferred channel (S303). Subsequently, the actual start time of the program included in the broadcast signal of the preferred channel is determined using the ACR (S304).

Figure 4 shows an embodiment of a method for determining the actual start time of a program using ACR according to the present invention.

That is, when the broadcast receiver transmits the fingerprint to the ACR server (S401), the ACR server transmits program information corresponding to the fingerprint to the broadcast receiver (S402). The program information includes a unique identifier of the program. At this time, the ACR server may have information of each program through communication with a broadcasting station in advance, or may obtain information of the corresponding program from the broadcasting station by communicating with the broadcasting station only when a request is received from the broadcasting receiver.

The broadcast receiver requests the broadcasting station for the actual start time information of the program based on the program information received from the ACR server (S403). Then, the broadcast station transmits the actual start time information of the program to the broadcast receiver (S404).

As such, the broadcast receiver of FIG. 4 receives only program information from an ACR server, and requests and receives actual start time information of a program directly from a broadcast station.

Here, the fingerprint refers to feature information of a corresponding program extracted from at least one of an image, a sound, and a video of a specific program.

5 shows another embodiment of a method for determining an actual start time of a program using ACR according to the present invention.

That is, when the broadcast receiver transmits the fingerprint to the ACR server (S501), the ACR server requests the broadcasting station for actual start time information of program information corresponding to the fingerprint (S502). The broadcasting station transmits actual start time information of the requested program to the ACR server (S502). The ACR server transmits program information including actual start time information of a program to the broadcast receiver (S503).

As such, the broadcast receiver of FIG. 5 is an example of receiving an actual start time of a program from an ACR server.

4 or 5, after receiving the actual start time information of the program included in the preferred channel using the ACR, and when the actual start time of the program is reached (S305), the program is displayed through the second screen. Display (S306). Then, it is checked whether a predetermined time has elapsed (S307). If the predetermined time has not passed, the program of the preferred channel is continuously displayed through the second screen, and if the predetermined time has elapsed, the second screen is closed (S308).

This process is repeated at each start of the favorite channel. In addition, the same process is applied when there are a plurality of preferred channels.

6 (a) to 6 (c) show an example in which the PIP is closed after the program of the preferred channel is displayed for a predetermined time through the PIP at the actual start time of the program. That is, while the broadcast signal of the channel which has passed through the first receiver and the first broadcast signal processor is displayed on the first screen as shown in (a) of FIG. 6, when the actual start time of the program of the preferred channel is reached, FIG. The program of the preferred channel is displayed for a predetermined time through the second screen as shown in b). After a predetermined time has elapsed, the second screen is closed as shown in FIG.

7 is a flowchart showing another embodiment of an image display method according to the present invention, and extracts a start time of each program of a favorite channel using EIT information (S701).

When the start time of the specific program of the preferred channel extracted in step S301 is reached (S702), the second tuner 251 is controlled to receive a broadcast signal of the preferred channel (S703). Subsequently, the actual start time of the program included in the broadcast signal of the preferred channel is determined using the ACR method of FIG. 4 or 5 (S704).

When the actual start time of the program is reached in step S704 (S705), the program is displayed on a second screen (S706). Then, it is checked whether a predetermined time has elapsed (S707). If a program of the second screen is selected before the predetermined time elapses, the selected program is displayed on the first screen (S709). In this case, the program originally displayed on the first screen may be switched to the second screen and displayed continuously, or may no longer be displayed.

On the other hand, if the program of the second screen is not selected until a predetermined time elapses, the second screen is closed (S710).

This process is repeated at each start of the favorite channel. In addition, the same process is applied when there are a plurality of preferred channels.

8A to 8D show another example in which the PIP is closed after the program of the preferred channel is displayed for a predetermined time through the PIP at the actual start time of the program.

That is, FIG. 8A illustrates an example of displaying a program of a channel that has passed through the first receiver and the first broadcast signal processor through a first screen. 8B illustrates an example in which a program of the preferred channel, which has passed through the second receiver and the second broadcast signal processor, is displayed on the second screen at the actual start time of the program of the preferred channel. 8C illustrates an example in which a program of a preferred channel is displayed on a first screen by selecting a program of a second screen before a predetermined time elapses, and a program that was originally displayed on a first screen is displayed on a second screen. Is showing. In other words, the main / sub screen switching is made. 8D illustrates an example in which a program of the second screen is displayed on the first screen when the program of the second screen is selected before a predetermined time elapses, and the program originally displayed on the first screen is no longer displayed. Is showing.

The present invention described so far is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are the scope of the present invention. Belongs to.

201,251: tuner 202,252: demodulator
203, 253: demultiplexer 204, 254: section filter
205,255: data decoder 206,258: storage unit
207: audio / video decoder 208,260: screen display
209: preferred channel monitoring unit 210: preferred channel tuning control unit
257: Video Decoder 259: Program Actual Start Time Determination Unit

Claims (14)

A first receiver configured to receive a broadcast signal of a specific channel;
A first broadcast signal processor for separating and processing an audio / video stream from the received broadcast signal of the specific channel and displaying the same on a first screen;
A table information processor for separating a data stream from the broadcast signal and extracting table information from the separated data stream;
A storage unit which stores the extracted table information;
A preference channel processor configured to acquire a program start time of a preference channel set by a user using the table information;
A second receiver configured to receive a broadcast signal of the preferred channel at a start time of the acquired program of the preferred channel;
A program actual start time determiner configured to determine an actual start time of a program of the preferred channel through automatic content recognition (ACR); And
And a second broadcast signal processor for displaying a broadcast signal of the received preferred channel on a second screen at an actual start time of a program of the preferred channel. The method of claim 1, wherein the preferred channel processing unit
And a start time of a program of the preferred channel from an event information table (EIT) of the table information. delete The method of claim 1, wherein the program actual start time determination unit
Transmitting a fingerprint extracted from at least one of an image, a sound, and a video of a program of the preferred channel from an ACR server, and requesting and receiving an actual start time of the program from a broadcasting station based on program information provided from the ACR server; Broadcast receiver, characterized in that. The method of claim 1,
The second screen is a broadcast receiver, characterized in that the PIP screen. The method of claim 1,
And the second screen is displayed only for a predetermined time. The method of claim 6,
And when the broadcast signal of the second screen is selected within the predetermined time, the broadcast signal of the second screen is displayed on the first screen. Receiving a broadcast signal of a specific channel;
Separating and processing an audio / video stream from the broadcast signal of the received specific channel and displaying the same on a first screen;
Separating a data stream from the broadcast signal, extracting table information from the separated data stream, and storing the table information in a storage unit;
Acquiring a program start time of a preferred channel set by a user using the table information;
Receiving a broadcast signal of the preferred channel at the start time of the program of the obtained preferred channel;
Determining an actual start time of a program of the preferred channel through automatic content recognition (ACR); And
And displaying a broadcast signal of the received preferred channel on a second screen at an actual start time of a program of the preferred channel. The method of claim 8, wherein the obtaining of the program start time comprises:
And a start time of a program of the preferred channel from the event information table (EIT) of the table information. delete delete delete delete delete

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