KR100962943B1 - Broadcasting signal receiver and method for processing thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast signal receiver and a processing method thereof, and more particularly to a system of a TV receiver (broadcast signal receiver) by enabling management of a version change of DCCT and DCCSCT through MGT, including DCCT and DCCSCT in the contents of MGT. The present invention relates to a broadcast signal receiver and a processing method for improving efficiency and effectively supporting a DCC service of a broadcasting station to viewers. To this end, the present invention provides a broadcast including an encoder for encoding audio data and video data, a multiplexer for multiplexing the encoded audio data, the encoded video data and PSIP data, and a modulator for modulating data output from the multiplexer. A broadcast signal receiver for receiving a broadcast signal including audio data, video data, and PSIP data, output from a signal transmitter, comprising: a system time table (STT) including information about time and any one of 32 numbers Includes Master Guide Table (MGT) containing version information of Directed Channel Change Selection Code Table (DCCSCT), which has a value and increases by 1 as the table changes, and Event Information Table (EIT) containing information about the program. The received PSIP data, the received audio data, and the received Demodulator for demodulating the video data; And a demultiplexer for demultiplexing the audio data, the video data, and the PSIP data output from the demodulator and outputting the separated data, respectively.

Description

BROADCASTING SIGNAL RECEIVER AND METHOD FOR PROCESSING THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast signal receiver and a processing method thereof, and in particular, by controlling and managing versions of a Directed Channel Change Table (DCCT) and a Directed Channel Change Selection Code Table (DCCSCT) through a Master Guide Table (MGT), that is, Broadcasting signal to improve system efficiency of digital TV receiver and effectively support DCC (Directed Channel Change) service of viewers by enabling DCCT and DCCSCT to manage version change of DCCT and DCCSCT through contents. A receiver and a processing method thereof.

First of all, in watching a digital TV, if the user sets some items that he / she wants in advance, he or she can watch a program that satisfies the conditions of the predetermined items without having to find the broadcasting channel. By making this change, it is proposed as an extended standard of Program and System Information Protocol (PSIP), which is the Advanced Television Systems Committee (ATSC) standard of terrestrial and cable digital TV.

In this DCC document 508, two new tables of DCCT and DCCSCT are defined in addition to the basic tables of PSIP, where DCCT is a table indicating when and under what conditions and from which channel to change automatically. DCCSCT is a table that provides digital TV viewers with a code that can be selected according to their tastes by having Category Selection Codes and corresponding values that can be a condition of channel change.

Then, in a DCC digital TV with a built-in DCC function, the digital TV receiver first receives the DCCSCT and displays the contents thereof to the viewer, and the viewer selects a broadcast selection item indicated by a selection code, such as education, movies, and news. Look at the items and preset what you want.

In this way, the viewer automatically changes to a channel that satisfies a preset item condition to provide a DCC function to the viewer.

For reference, DCCT and DCCSCT, like some tables in PSIP, have a version number field, which means that the selection code for the DCC, the channel, time, and conditions to be changed may change.

Therefore, the digital TV receiver should be prepared to always change the two important tables of channel change, that is, DCCT and DCCSCT to the new version (changed content), and all tables of PSIP that can be changed are managed as sub-tables of MGT. Changes must be reflected in the digital TV function.

However, in the prior art operating as described above, since DCCT and DCCSCT are not defined as subtables of the MGT, in order to update a new version of DCCT and DCCSCT, version control of DCCT and DCCSCT is not possible through MGT. The digital TV receiver always has a problem of degrading the performance of the digital TV system by always monitoring whether the version of DCCT and DCCSCT are changed through a Transport (TP) chip.

Accordingly, the present invention has been made in view of the above problems, and the digital TV receiver includes two tables on channel change, that is, DCCT and DCCSCT in the contents of MGT, namely, management of version change of DCCT and DCCSCT. The purpose of the present invention is to provide a broadcast signal receiver and a processing method thereof to improve the system efficiency of a digital TV receiver and to effectively support the DCC service of a broadcasting station to viewers through version management.

The broadcast signal receiver according to the present invention for achieving the above object is output from a broadcast signal transmitter including a multiplexer for multiplexing audio data, video data and PSIP data and a modulator for modulating data output from the multiplexer. A broadcast signal receiver for receiving a broadcast signal including audio data, video data, and PSIP data, the broadcast signal receiver comprising: a system time table (STT) including information about time; The received PSIP data including the Master Guide Table (TET), Extended Text Table (ETT), Directed Channel Change Selection Code Table (DCCSCT) and Directed Channel Change Table (DCCT) including channel change information, and the received audio. A demodulator for demodulating data and the received video data; And a demultiplexer for demultiplexing the audio data, the video data, and the PSIP data output from the demodulator and outputting the separated data, respectively, wherein the MGT includes any one of PIDs and 32 numbers of the ETT, DCCSCT, and DCCT, respectively. Version information of each of the ETT, DCCSCT and DCCT has a value and increases by 1 according to the change of the table is included, the version change of the ETT is determined through the PID and version information, the version of the DCCSCT and DCCT The change may be determined based on the version information.

Broadcast signal processing method according to the present invention for achieving the above object is output from a broadcast signal transmitter including a multiplexer for multiplexing audio data, video data and PSIP data and a modulator for modulating the data output from the multiplexer A broadcast signal processing method for processing a broadcast signal, comprising: receiving the broadcast signal including audio data, video data, and PSIP data; System Time Table (STT) including information about time, Master Guide Table (MGT) including PID and version information of received table, Extended Text Table (ETT), DCCSCT including channel change information Demodulating the received PSIP data, the received audio data, and the received video data including a Directed Channel Change Selection Code Table and a Directed Channel Change Table (DCCT); And demultiplexing the demodulated audio data, video data, and PSIP data to output the separated data, respectively, wherein the MGT includes any one of a PID and 32 numbers of the ETT, DCCSCT, and DCCT, respectively. It includes the version information of the ETT, DCCSCT and DCCT each increase by 1 in accordance with the change of the table, the version change of the ETT is determined through the PID and version information, the version change of the DCCSCT and DCCT Characterized by the version information.

According to the present invention, two important tables of channel change, namely, DCCT and DCCSCT, can be versioned through MGT, reducing the number of tables to be monitored, improving the CPI performance of a digital TV receiver system, and providing viewers with accurate DCC service of broadcasting stations. It has the effect of receiving.

1 is a block diagram showing the configuration of the version control device of the digital TV through the present invention MGT.
Figure 2 is an exemplary view showing the operation of the packet multiplexer of the present invention.
Figure 3 is an exemplary view showing the operation of the packet demultiplexer of the present invention.

In order to achieve the above object, the present invention provides international standardization of ISO (International Organization for Standardization) data including MGT (Master Guide Table) including version information of video, audio and Directed Channel Change Selection Code Table (DCCSCT). An MPEG encoder which encodes according to the MPEG standard of the Organization) / IEC (International Electrotechnical Commission International Electrotechnical Commission) and forms an elementary stream, and an elementary stream (elementary stream or less, elementary stream received from the MPEG encoder). In order to manage data in a unit form, a packet compression unit compresses a packet elementary stream, and an audio, video, and data packet elementary stream (PES: packetized elementary stream or less) received from the packet compression unit. 188 bytes in size for efficient transmission A multiplexer configured to transmit a transport packet to a mux digital TV receiver, a modulator for recompressing, modulating, and transmitting a transport packet received from the multiplexer, and amplifying a signal from the modulator to a transmitter. An RF amplifying unit for transmitting, a transmitting unit for transmitting a signal from the RF amplifying unit, a receiving unit for receiving and transmitting a digital broadcast signal from the transmitting unit, a demodulator for demodulating and transmitting a signal received from the receiving unit, A demultiplexer which separates video, audio, and data from the demodulator and transmits the video, audio, and data by using a packet identifier, and decompresses the video, audio, and data streams received from the demultiplexer, and digitally broadcasts through the screen and the speaker. To watch It is composed of a packet restoration.

Hereinafter, the operation and effects of the broadcast signal receiver and its processing method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a version control device of a digital TV through the present invention MGT, as shown in the MPEG encoding unit 10 to encode the video, audio and data according to the MPEG standard to form a basic stream form And a packet compression unit 20 for compressing the data of the elementary stream form received from the MPEG encoding unit into a packet elementary stream, and audio and video received from the packet compression unit 20. And a multiplexer 30 for transmitting a packet of 188 bytes in size to efficiently transmit the data packet elementary stream, and a modulator 40 for compressing, modulating, and transmitting the transmission packet received from the multiplexer 30. And an RF amplifying unit 50 for amplifying the signal from the modulator 40 and transmitting the amplified signal to the transmitting unit. A transmitter 60 for transmitting a signal from the receiver; a receiver 70 for receiving a digital broadcast signal from the transmitter 60; and a demodulator for demodulating and transmitting a signal received from the receiver 70. 80, a demultiplexer 90 which separates and transmits video, audio, and data from the transport stream received from the demodulator 80 by using a packet identifier, and a video, audio, and the like received from the demultiplexer 90. It is composed of a packet decompression unit 100 for restoring the compression of the data stream to view the digital broadcast through the screen and the speaker, the operation of the present invention configured as described above is as follows.

First, a broadcasting station encodes video, audio, and data through the MPEG encoder 10 according to the standards of ISO / IEC 13818-2, 3, 6, and then converts the video, audio, and data into an elementary stream.

Then, the elementary stream is compressed again in the form of a packet, that is, the packet elementary stream through the packet compression unit 20 for efficient compression and management for each unit of data. It is made of transport packets of a byte size and are mixed through the multiplexer 30, respectively.

The contiguous gathering of the transport packets muxed through the multiplexer 30 is called a bit stream, and this bit stream for broadcasting is a VSB (Vestigial Side Band) channel modulator 40 and an RF amplifier. Compressed and sent out again through (50).

In this way, the transmitted digital broadcast stream (Bit Stream) is the reverse of the above-described order through the digital TV receiver of each home, that is, each demuxed through the demultiplexer 90 and decoded by the decoder 100 to allow the viewer. Allows you to watch digital broadcasts.

As such, the PSIP tables that contain information about audio, video packet IDs, and other broadcast information (EPG: broadcast program guide information) for each broadcast channel are stored in the corresponding table through a set of demultiplexers (settings for reception). Can be received.

At this time, the maximum number of tables that can be simultaneously set in the demultiplexer 90 is generally about 29, and the rest is allocated one by one for the audio transmission packet and the video transmission packet.

Once the audio / video information (PID value) of the channel and the program is decoded through the virtual channel table (VCT) of the PSIP, the demultiplexer 90 is set to watch the broadcast program. In order to monitor channel and program information, each table has a version number, where the version number has a value from 0 to 31 and is circulated in increments of 1.

For example, if a professional baseball broadcast is performed on channel 15-1 and the information is transmitted to the VCT and the professional baseball is stopped due to rain and the movie is broadcasted, if the VCT has a version number of 3 for the first time, the channel is changed to a movie. A VCT with information will have a version number of four.

Therefore, if the demultiplexer 90 does not receive the VCT because the VCT is received at one time, the VCT will not know the changed contents.

The table having other information besides the channel information, that is, the STT, the EITs, the ETTs, etc., cannot be monitored for the change of the version because the table is once translated through the demultiplexer 90.

However, if all the tables are set in the demultiplexer to monitor the change of the information, the demultiplexer will exceed the maximum number of table settings and the system overhead will be very large.

In order to solve this problem, since PSIP manages the version number of all tables by placing an MGT, it is no longer necessary to monitor whether a table is changed once through the demultiplexer 90. The demultiplexer 90 may monitor the change.

In addition, in order to manage the version of the digital TV receiver, first set the MGT in the demultiplexer in the broadcast receiver, and if the version number of the MGT is changed to receive a new MGT.

Here, since the contents of the MGT include PIDs and version numbers of each table, it is possible to compare which tables have been changed, and when such a changed table is found, only the corresponding table is set in the demultiplexer 90 and received again. .

As such, DCCT and DCCSCT are defined in the contents of the MGT to manage the versions of DCCT and DCCSCT, so that the monitoring of the version change of the contents of the DCCT and DCCSCT can be implemented through the MGT. 90) Reduced module overload and increased system performance.

Figure 2 is an exemplary view showing the operation of the packet multiplexer of the present invention. As shown in FIG. 2, a packet multiplexer is used to transmit a packet in a transmitter. The video multiplexer includes a video, audio, and other information in a transport stream. TV is to send to the receiver.

In addition, the multiplexer transmits not only a plurality of broadcasts but also data for providing an interactive service within a range in which a transmission speed is allowed, that is, transmits various information on the same channel.

FIG. 3 is an exemplary view illustrating an operation of the packet demultiplexer of the present invention. As shown in FIG. 3, the packet demultiplexer transmits video, audio, and other information through a packet identifier (PID) through a transport stream transmitted from a channel of a digital TV. To separate again.

In addition, the demultiplexer classifies necessary information by the same type, and in this case, the packet identifier included in the header portion of the packet is used to classify the same type.

For reference, in the analog broadcast method, one broadcast is transmitted in one frequency band, but in the digital broadcast method, multiple broadcasts may be sent in one frequency band.

10: MPEG encoding unit 20: packet compression unit
30: multiplexer 40: modulator
50: RF amplifier 60: transmitter
70: receiver 80: demodulator
90: demultiplexer 100: packet recovery unit

Claims (8)

A broadcast receiving a broadcast signal including audio data, video data and PSIP data output from a broadcast signal transmitter comprising a multiplexer multiplexing audio data, video data and PSIP data and a modulator for modulating the data output from the multiplexer Signal receiver,
System Time Table (STT) including information about time, Master Guide Table (MGT) including PID and version information of received table, Extended Text Table (ETT), DCCSCT including channel change information A demodulator for demodulating the received PSIP data, the received audio data, and the received video data including a Directed Channel Change Selection Code Table and a Directed Channel Change Table; And
And a demultiplexer for demultiplexing the audio data, the video data, and the PSIP data output from the demodulator to output the separated data.
The MGT includes the version information of each of the ETT, DCCSCT and DCCT, each of which has a value of any one of PID and 32 numbers of the ETT, DCCSCT and DCCT and increases by 1 as the table is changed. The change is determined through the PID and version information, and the version change of the DCCSCT and DCCT is determined via the version information broadcast signal receiver. The method of claim 1, wherein the broadcast signal,
Broadcast signal receiver, characterized in that transmitted according to VSB (Vestigial Side Band) transmission technology. According to claim 1, The DCCSCT and version information of the DCCT,
And a version number of the table. The method of claim 1,
And the demultiplexer demultiplexes DCCSCT and DCCT using PIDs of the DCCSCT and DCCT. A broadcast signal processing method for processing a broadcast signal output from a broadcast signal transmitter comprising a multiplexer for multiplexing audio data, video data, and PSIP data, and a modulator for modulating data output from the multiplexer,
Receiving the broadcast signal comprising audio data, video data and PSIP data;
System Time Table (STT) including information about time, Master Guide Table (MGT) including PID and version information of received table, Extended Text Table (ETT), DCCSCT including channel change information Demodulating the received PSIP data, the received audio data, and the received video data including a Directed Channel Change Selection Code Table and a Directed Channel Change Table (DCCT); And
And demultiplexing the demodulated audio data, video data, and PSIP data to output the separated data, respectively.
The MGT includes the version information of each of the ETT, DCCSCT and DCCT, each of which has a value of any one of PID and 32 numbers of the ETT, DCCSCT and DCCT and increases by 1 as the table is changed. The change is determined through the PID and version information, and the version change of the DCCSCT and DCCT is determined via the version information broadcast signal processing method. The method of claim 5, wherein the broadcast signal,
Broadcast signal processing method characterized in that the transmission according to the VSB transmission technology. The method of claim 5, wherein the DCCSCT and version information of the DCCT,
And a version number of the table. 6. The method of claim 5,
And demultiplexing the DCCSCT and the DCCT using the DCCSCT and the PID of the DCCT included in the MGT.

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