BRPI0617315A2 - method for the turbo transmission of a digital broadcast transmission stream, a digital broadcast transmission and reception system, and a signal processing method thereon - Google Patents

Abstract

A digital broadcast transmission / reception system, and a signal processing method thereof for a turbo processing digital broadcast transmission stream and a processed stream transmission, includes a parity area generation unit that prepares a first parity insertion area with respect to a dual transport (TS) stream that includes a normal flow and a turbo flow as multiplexed, the first interleaver intertwining the dual TS that is transmitted from the parity area generation unit, a unit turbo processing that detects the interlaced dual TS turbo flow, exclusively encoding the detected turbo flow for turbo-processing, and filling the encoded turbo flow within the dual TS, a deinterlacing that de-interlaces the dual TS that is processed by the turbo processing, and a transmission unit that transmits the dual TS that is processed in the deinterlacing.

Description

METHOD FOR TURBO TRANSMISSION OF A DIGITAL DIFFUSION TRANSPORT FLOW, DIGITAL DIFFUSION TRANSMISSION AND RECEIVING SYSTEM, AND A SIGNAL PROCESSING METHOD

THE SAME

TECHNICAL FIELD

Aspects of the invention relate to a method for turbo processing and the transmission of a digital broadcast transmission stream, a digital broadcast reception and transmission system and a method of processing the signals thereof. More particularly, aspects of the invention relate to a method for the turbo processing and transmission of a digital broadcast transmission stream to improve the reception performance of a terrestrial digital wave television (DTV) system in the United States according to the Advanced Television Systems Committee (ATSC) Vetigial Side Band (VSB) transmission of the information and mapping with respect to a dual transport flow (TS) that includes normal data and turbo data, and a transmission and reception of digital broadcasting.

TECHNICAL BACKGROUNDS

The Advanced Television Systems Committee (ATSC) Trace Side Band Transmission (VSB) system, which is used in the United States Algerian Digital Television (DTV) system, is a unique deporting system that broadcasts a synchronization segment. field (sync) for each unit of 312 finger segments. Therefore, the reception performance of the ATSCVSB system is lower over weak channels, especially over a Doppler fading channel.

Figure 1 is a block diagram of an ATSC VSB digital broadcast transceiver of related technology. The digital diffusion transceiver shown in Figure 1 is configured according to an enhanced VSB system (E-VSB) proposed by Phillips, and produces and transmits a dual-configured stream by adding enhanced data or robust standard ATSC VSB system normal data.

As shown in Figure 1, the digital broadcast transmitter includes a random choice device 11, a Reed-Solomon (RS) encoder 12 having a concatenated decoder shape that adds parity bytes to a dual transport stream to allow errors generated by channel failures. during transmission are corrected during reception, an interleaver 13 interleaving the encoded RS data according to a predetermined standard, and a 2/3 speed truss encoder with respect to interlaced data and mapping of interlaced data to 8-level symbols. With this structure, the digital broadcast transmitter performs error correction coding with respect to the dual stream.

The dual broadcast transmitter further includes a multiplexer 15 that inserts sync and segment synchronization in the coded error correction data according to a data format shown in Figure 2, and a modulator 16 that inserts a pilot by adding a current value predetermined direct (DC) to the inserted data symbols and segment synchronization and field synchronization, modulating by resulting signal amplitude over an intermediate frequency (IF) carrier, filtering the resulting IF signal to produce a vestigial sideband (VSB) signal, conversion VSB signal to a radio frequency (RF) signal through the channel.

Thus, in the digital broadcast transmitter, normal data and enhanced or robust data are multiplexed according to the dual flow system which transmits normal data and enhanced data or costs on a channel and are input to random choice device 11. Input data is randomized by the random choice device 11, and the randomized data is external encoded by the RS12 encoder, which is an external encoder. Interleaver 13 distributes the encoded data according to a predetermined standard. Interlaced data is encoded internally by the truss encoder 14 in 12-symbol units. Internal coded data is mapped to 8-level symbols. Field synchronization and segment synchronization are inserted into the mapped data.

The pilot is inserted and VSB modulation is performed. The VSB signal is upconverted to the RF signal, and the RF signal is transmitted through the channel.

A digital broadcast receiver shown in Figure 1 includes a tuner (not shown) that converts the received RF signal across the channel to a baseband signal, modulator 21 sensing synchronization and re-modulation with respect to baseband signal, equalizer 22 compensating by channel distortion generated by multiple transmission paths with respect to the modulated signal, a Viterbi 23 decoder corrects equalized signal errors and decodes the error corrected signal for symbol data, the deinterleaver 24 rearranging symbol data to the pattern predetermined by which data 13 were distributed by the interleaver 13 digital broadcast transmitter, the RS 25 decoder corrects the errors, and a nonrandom choice device26 de-randomizes the data corrected by the RS25 decoder and outputs a moving picture stream MPEG-2 (Moving PictureExperts Group). Therefore, the digital broadcast receiver of Figure 1 downconverts the RF signal to the baseband signals in reverse order relative to the digital broadcast transmitter, detects and equalizes the converted signal, and performs channel decoding, thereby recovering the original signal.

Figure 2 shows a VSB data frame in which segment synchronization and field synchronization are inserted according to an 8-VSB system that is used in the D TV system in the United States. As shown in Figure 2, a frame includes two fields. A field includes a field synchronization segment that is the first segment of the field, and 312 data segments. In the VSB data frame, a segment corresponding to an MPEG-2 packet comprises 4-symbol segment synchronization and 828 data symbols. Segment synchronization and field synchronization in Figure 2 are used for synchronization and equalization in the digital broadcast receiver. More specifically, segment synchronization and field synchronization, which are known as the digital broadcast transmitter and receiver, are used as reference signals when the receiver performs synchronization and equalization. The United States Digital Terrestrial Wave Broadcasting System of Figure 1 is configured to produce and transmit the current flow by adding enhanced or robust data to the normal data of ATSC VSB's related technology system. Therefore, the United States undersea digital broadcasting system transmits enhanced or robust data as well as normal data.

DESCRIPTION OF THE INVENTION

TECHNICAL PROBLEM

Although enhanced or robust data is transmitted in dual stream beyond normal data, lower reception performance due to channel distortionmultivity caused by normal data stream transmission is not markedly improved. In fact, almost no improvement in reception performance is achieved by the flow of improved normal data. In addition, the receiving performance is not much improved over improved or robust flow either.

TECHNICAL SOLUTION

Thus, an aspect of the invention is to provide a method for turbo processing and transmission of a digital broadcasting transmission stream to enhance the performance of digital terrestrial wave television (DTV) reception in the United States according to the lateral lateral band (VSB). Advanced Television System Committee (ATSC) through information exchange and mapping with respect to a dual transport stream (TS) that includes normal and turbo data, a digital broadcast transmission and reception system, and a signal processing method the same.

The above aspects and / or other features of the invention may be substantially achieved by providing a method of processing a digital broadcast signal comprising: preparing a first area for parity insertion with respect to a dual transport (TS) stream that includes a normal stream multiplexed with a turbo stream, intertwine dual TS including the first area, detect intertwined dual TS turbode flow, uniquely encode the detected fluxoturbo, and fill the TSdual encoded turbo flow for turbo processing, deinterlace the dual turbo-processed TS, transmit the Deinterlaced porturbo processed dual TS, receive the transmitted dual TS, demodulate the received dual TS, equalize the dual-demodulated TS, decode the normalized dual-TS stream to recover the normal data packet, and decode the equalized dual-TS turbo stream to recover the turbo data.

According to one aspect of the invention, the method of processing a digital broadcast signal further comprises, prior to preparing the first area, preparing a second area for parity insertion with respect to the fluxoturbo; and generating the dual TS by multiplexing the turbo flow having the second area to insert parity with the fluxonormal therein.

According to one aspect of the invention, detecting turbo flow comprises detecting turbo flow while multiplying the dual TS that is interlaced, encoding the detected turbo flow by inserting a parity with respect to the turbo flow detected within a second area created for parity insertion, interlacing turbocharged flow, and generate the dual TS by multiplexing the turbocharged flow, and the normal flow.

According to one aspect of the invention, the turbo flow detector further comprises converting a one-byte interlaced dual TS basic unit to a symbol, and converting a generated dual TS basic unit from a symbol to one byte.

According to one aspect of the invention, the deinterlaced dual DOTS transmit comprises coding by inserting a parity with respect to the deinterlaced dual TS within the first area for parity insertion, interlacing the encoded TSdual, trellising the dual-interlaced TS, multiplexing by adding a synchronization signal truss coded dual TS, and channel modulate the multiplexed dual TS and transmit the resulting flux.

According to one aspect of the invention, the dual TS comprises a field containing a plurality of consecutive packets, an option field which records in it a predetermined type of packet information, is arranged in the package which is located at a predetermined position in the field without overlapping the flow. turbo, and the option field comprises a program clock reference (PCR), an original program clock reference (OPCR), a trim countdown that indicates the number of macroblock, a transport private data length, and / or a length of adaptation field extension.

According to one aspect of the invention, the dual TS comprises a field containing a plurality of consecutive packets, and the turbo flow and normal flow are arranged in the plurality of packets, respectively.

According to one aspect of the invention, normal flow decoding comprises decoding wherein an error is corrected with respect to the normal dual equalized TS flow and the error corrected normal flow is decoded, deinterlacing the normal flow that is decoded by the Viterbi decoder, correcting the error. normal de-interlaced stream, and retrieve the normal data packet to de-randomize the normal de-interlaced stream, and retrieve the normal data package by de-randomizing the corrected normal stream of errors.

According to one aspect of the invention, the turbo flow decoding comprises turbo decoding the equalized dual TS turbode flow, deinterlacing the turbo-decoded turbodflow, Reed-Salomon decoding the de-interlaced turbo flow, and de-randomizing the Reed-Solomon turbodecoded flow.

According to one aspect of the invention, the method of processing the digital broadcast signal further comprises inserting a supplemental reference sequence into a dual TS filler area that includes a normal multiplexed stream with a turbo flow, and equalizing the dual-modulated TS using the reference sequence. supplemented retrieval of the fill area when compared to an additional reference sequence stored in the receiver.

According to one aspect of the invention, the method of processing a digital broadcast signal further comprises multiplexing the normal flow and the turbo flow to generate a dual TS, and preparing the fill area on the dual TS.

According to one aspect of the invention, the method of processing a digital broadcast signal further comprises, prior to entering the supplemental reference sequence, randomizing the dual TS having the padding area therein.

In accordance with one aspect of the invention, multiplexing normal flow and turbo flow comprises preparing a second area for parity insertion with respect to turbo flow.

According to one aspect of the invention, the dual TS comprises the turbo flow disposed in the frame packets at predetermined packet intervals.

According to one aspect of the invention, the dual TS comprises an option field disposed in the package located at a predetermined position of the field that does not overlap the turbo flow, the padding area is at least one adaptation field excluding the option field, and The option field comprises a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown that indicates the number of macroblock, a transport private data length, and / or a length of the mismatch field.

According to one aspect of the invention, the field comprises 312 packets, and when the 312 packets are divided into units of 52 packets each, the option field is located in the field as follows, Program Clock Reference (PCR): 52n + 15, n = 0; Original Program Clock Reference (OPCR): 52N + 15, N = 1;

Length of adaptation field length: 52n + 15, n = 2; Private transport data length: 52n + 15, n = 3,4,5; and clipping countdown: 52n + 19, n = 0.1,2,3,4,5.

In another aspect of the present invention, a digital broadcasting system comprises: a transmission source comprises: a parity area generating unit that prepares a first parity insertion area with respect to a dual transport stream (TS) including a normal multiplexed stream with a turbo flow, a first interleaver that intertwines the dual TS that is transmitted from the parity area generating unit, a turbo-processing unit that detects dual-interlaced TS turbo flow, encoding the turbodetected flow exclusively for turbo processing, and fills the encoded fluxoturbo within the Dual TS, a deinterlacing that interlaces the dual TS that is processed by the turbo-processing unit, and a transmission unit that transmits the dual TS that is processed in the deinterlacing, is a digital broadcast receiver system comprising: a demodulator that receives the dual transport stream ( TS) and modulates the dual TS I received doo, an equalizer that equalizes dual demodulated TS, a first processor that decodes normal TS dual flow and outputs a normal data packet, and a second processor that decodes equalized dual TS turbo flow and outputs a turbo data packet.

According to one aspect of the invention, the first processor comprises a Viterbi decoder that corrects an error with respect to the normal flow of equalized dual TS and decodes the error corrected normal flow, a first deinterlacing that deinterlaces the normal flow that is decoded by the Viterbi decoder, a first Reed decoder. -Solomon that corrects the error of the normal flow that is processed in the first deinterleaver, and a nonrandom choice device that recovers the normal data package by de-randomizing the error-corrected normal flow, and the second processor comprises a turbo decoder that decodes the dual-equalized TS turbo flow. , a second deinterlacing that deinterlaces the turbo-decoded turbo flow, a second Reed-Solomon decoder that decodes turbode-interlaced flow, and a nonrandom choice device that de-randomizes Reed-Solomon's decoded turbo flow.

According to one aspect of the invention, the dual TS comprises a field containing a plurality of consecutive packets, and the turbo flow and normal flow are arranged in the plurality of packets, respectively.

According to one aspect of the invention, the dual TS comprises: a field containing a plurality of consecutive packets, an option field which records in it a predetermined type of packet information, is arranged in the packet at a predetermined position of the field that does not overlap the turbo stream. , and the option field comprises at least one of a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown that indicates the number of macroblocks, a transport private data length, and an adaptation field extension length.

According to one aspect of the invention, the digital broadcasting system further comprises a TS frame unit that generates dual TS by multiplexing normal flow and turbo flow, and a dual oTS randomization unit which is generated in the TS frame unit, and supplying the dual TS generated to the parity area generating unit.

According to one aspect of the invention, the TS structure unit comprises a duplicator that prepares the second area for turbo flow parity insertion, and a service MUX that multiplexes the turbo flow that is processed in the duplicator, and the normal flow, and outputs the resulting flux.

According to one aspect of the invention, the TX structure unit further comprises a first Reed-Solomon encoder encoding an externally received turbo flow, and a pre-interleaver that interlaces the turbocoded flow and provides the resulting flow to the duplicator.

According to one aspect of the invention, the turbo-processing unit comprises a dual oTS de-multiplexed de-MUX that is interlaced at the first interleaver and detects turbo flow, a turbo encoder that encodes turbo flow by inserting a parity with respect to the fluxoturbo that is detected. by de-MUX, within the second area for parity insertion, a turbo interleaver that interlaces the turbo flow that is processed in the turbo coded, and a turbo data MUX that structures a dual transporter flow (TS) by multiplexing the turbo flow that is processed in the turbo interleaver, and the normal flow that is multiplexed on the de-MUX.

According to one aspect of the invention, the transmission source further comprises an additional reference desinal insertion unit receiving the dual TS, and inserts an additional reference signal into a fill area provided on the dual TS, and the equalizer equalizes the demodulated dual TS using the additional reference signal extracted from the fill area in comparison as an additional reference signal stored in the receiver.

According to one aspect of the invention, the digital broadcast system further comprises: a transport flow structure unit (TS) which generates the dual TS to multiply the normal flow and the turbo flow, and prepares the fill area in the dual TS, and a randomization unit that randomizes the supplied dual TS from the TS frame unit and provides the randomized stream to the additional reference signal insertion unit.

According to one aspect of the invention, the TS structure unit comprises a duplicator which prepares a second area for turbo flow parity insertion, and a service MUX that multiplexes the fluxoturbo and normal flow that are processed in the duplicator. filling area, and emit the resulting flow.

According to one aspect of the invention, the S-frame unit further comprises a first Reed-Solomon encoder which performs Reed-Solomon encoding with respect to an externally received turbo stream, and a pre-interleaver that interlaces the encoded turbo stream and provides the resulting flux for the duplicator.

According to one aspect of the invention, the dual TS comprises a frame containing a plurality of consecutive packets, with each packet comprising an adaptation field, and the padding area is at least an adaptation field portion.

According to one aspect of the invention, the dual TS comprises an option field disposed in the package at a location of the adaptation field that does not overlap turbo flow, the fill area is at least a part of the adaptation field excluding the option field, and The option field comprises a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown that indicates the number of micro blocks, a transport private data length, and / or an extension length. field adaptation.

According to one aspect of the invention, the field comprises 312 packets, and when the 312 packets are divided into units of 52 packets each, the choice field is located in the field as follows: program clock reference (PCR): 52n + 15, n = 0; original program clock reference (OPCR): 52n + 15, n = 1; adaptation field extension length: 52n + 15, n = 2; transport private data length: 52n + 15, n = 3.4, 5; and clipping countdown: 52n + 197n = 0.1,2,3,4,5.

ADVANTABLE EFFECTS

As can be appreciated from the above description of the method for turbo processing and transmission of the TS for digital broadcasting, the digital broadcasting transmission / reception system, and the same signal processing method according to certain embodiments of the invention, the reception performance of a digital terrestrial television (DTV) in the United States under the Advanced Television System (ATSC) Trigger Lateral System (VSB) can be enhanced through information exchange and mapping with respect to a dual transport stream (TS ) which includes normal edited turbo data. As a result, the digital broadcasting transmission system not only provides compatibility with existing normal data transmission systems, but also improves reception under a variety of reception environments.

Although not required, it is understood that aspects of the invention may be implemented using software, hardware, and combinations thereof. Although described in terms of a broadcast signal sent over the air or cable, it is understood that transmission may be by recording in a medium for delayed retransmission in other aspects of the invention.

Although the invention has been shown and described with reference to certain versions thereof, it will be understood by those skilled in the art that various changes in shape and detail may be made therein without departing from the scope and scope of the invention as defined by the appended claims.

BRIEF DESCRIPTION OF DRAWINGS

These and / or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of embodiments of the invention, taken in conjunction with the accompanying drawings, of which:

Figure 1 is a block diagram showing a digital broadcast transceiver of technology related to the Advanced Television Systems Committee (ATSC) Trace Side Band System (VSB).

Figure 2 shows an exemplary frame structure of a VSB data frame used in the related technology digital broadcast transceiver shown in Figure 1.

Figure 3 is a block diagram showing a digital broadcast transmission system according to an embodiment of the invention.

Figure 4 is a block diagram provided to explain in detail the structure of the digital broadcast transmission system of Figure 3.

Figure 5 is a block diagram showing a transport flow (TS) construction unit of the digital broadcast transmission system of Figure 4.

Figure 6 is a block diagram showing in detail the structure of a transmission unit of the digital broadcast transmission system of Figure 4.

Figure 7 is a block diagram showing an example of a turbo processing unit of the digital broadcast transmission system of Figure 4.

Figure 8 is a block diagram showing the structure of a turbo encoder of the turbo-processing unit of Figure 7.

Figures 9 to 15 show exemplary structures of a dual transport flow package of the digital broadcast transmission system of Figure 4.

Figure 16 is a block diagram showing a digital broadcast transmission system that transmits a supplementary reference sequence (SRS) according to an embodiment of the invention. Figures 17 to 23 are exemplary structures of a dual transport flow package including the supplementary reference sequence (SRS) of the digital broadcast transmission system of Figure 16.

Figure 24 is a block diagram showing the structure of a digital broadcast reception system according to an embodiment of the invention.

Figure 25 is a block diagram of a turbo decoder of the digital broadcast reception system of Figure 24.

Figure 26 is a flowchart for explaining an example of a signal processing method in the digital broadcast transmission system of Figure 6.

Figure 27 is a flowchart for explaining an example of a signal processing method in the turbo-processing unit of Figure 7.

Figure 28 is a flowchart for explaining an example of a signal processing method in the digital broadcast receiving system of Figure 24.

Figure 29 is a flowchart for explaining an example of a signal processing method in the decoded turbo of Figure 25.

BEST MODE FOR CARRYING OUT THE INVENTION

Reference will now be made in detail to versions of the invention, examples of which are shown in the accompanying drawings, where like reference numerals refer to like elements as a whole. Versions are described below to explain the invention by referring to the Figures. Specific structures and elements in the following description are merely to assist in obtaining a comprehensive understanding of the invention. Thus, it is apparent that the invention may be implemented without utilizing such specific structures and elements. Also, well-known functions, structures, and elements have not been described in detail in the following description to avoid obscuring the invention with unnecessary details.

The following description assumes a familiarity with the Advanced Television Systems Committee (ATSC) Digital Television System (DTV) which incorporates aspects of the MPEG-2 system, details of which are described in the corresponding standards. Examples of such standards that may be relevant are ATSC A / 52B, Digital Audio Compression Standard (AC-3, E-AC-3), Revision B, June 14, 2005; ATSC A / 53E, ATSC Digital Television Standard (A / 53 ), Revision E, December 27, 2005; ATSC A / 54A, Recommended Practice: Guide to the Use of the ATSC Digital TelevisionStandard, December 4, 2003; ISO / IEC IS 13818-1: 2000 (E) , Information technology-Genericcoding of moving pictures and associated audio information:

Systems (second edition) (MPEG-2) (Information Technology: Generic Coding of Moving Images and Associated Audio Information: Systems (Second Edition) (MPEG-2); and ISO / IEC IS 13818-2: 2000 (E), Informationtechnology -Generic coding of moving pictures and associated audio information: Video (second edition) (MPEG-2), the content and disclosures of which are incorporated herein by reference, however, it is understood that aspects of the invention may be implemented in accordance with other standards and systems without restriction. In addition, the following description uses the terms "turbo" and "turbo data" which are represented in some of the drawings by the terms "robust" and "robust data".

Figure 3 is a block diagram showing a digital broadcast transmission system according to an embodiment of the invention. Referring to Figure 3, the digital broadcast transmission system includes a parity area generator unit 110, a first interleaver 120, a turbo processing unit 130, a deinterleaver 140, and a transmission unit 150. The parity area generating unit 110 provides an area for inserting parity bytes in a dual transport (TS) stream that includes a normal stream and a turbo stream. In other words, parity is calculated with respect to dual TS, and inserted (ie, recorded in bits) within the parity area. The parity area provided by the parity area generating unit 110 will be referred to as the "first parity insertion area" in the following description.

The first interleaver 120 interlaces the dual TS which has an area provided by the parity area generating unit 110 for parity insertion. The turbo-processing unit 130 detects the turbo flow included in the intertwined dual TS, turbo-turbocharges the TS, and fills the dual TS. While not required in all respects, it is understood that turbocharged processing of turbo processing unit 130 may include coding processes such as convolution coding with respect to TS turbo to render data turbo.

The deinterleaver 140 de-interlaces the dual TS emitted from the turbo processing unit 130. The transmission unit 200 transmits the dual TS after it has been processed in the deinterleaver 140. The structure of the transmission unit 200 will be described in detail below.

According to the version shown in Figure 3, fluxoturbo, which was treated with separate turbo processing, is transmitted along with normal flow. Therefore, reception performance under conditions of multivia or in a mobile environment improves and, at the same time, compatibility with the norm-consistent flow transmission / reception system is provided. It is further understood that turbo data may be various forms of data, such as audio, video, computer software, game data, music, sales information, Internet data, text, voice data, and other types of data transmitted beyond normal data. In addition, normal data may include data other than or instead of audio-video data used in digital broadcasting in accordance with aspects of the invention.

The digital broadcast transmission system of Figure 3 will be explained in more detail below with reference to the block diagram of Figure 4. Referring to Figure 4, the digital broadcast transmission system further includes a transport flow generating unit (TS) 300 and a random choice unit 150. The TS300 generating unit generates a dual TS by receiving a normal flow and a fluxoturbo, processing the turbo flow, and multiplexing the normal flow and the processed turbo flow. Although not required in all respects, normal and turbocharged flow may be received from an external module such as a broadcast camera, or from internal modules such as a compression module such as MPEG-2 module, a video encoder, and an encoder. audio

Random choice unit 150 randomizes the TS dual generated by the TS 300 generating unit and supplies it to the parity area generating unit 110. Thus, the parity area generating unit 110 provides a parity area for the dual TS. Since the elements of Figure 4 other than the TS 300 generating unit and the random choice unit 150 are the same as those in the above version of Figure 3, an additional description will be omitted for brevity.

An exemplary structure of the TS 300 generator unit will be described below with reference to Figure 5. The TS 300 generator unit includes a first Reed-Solomon encoder 310, a pre-interleaver 320, a doubler 330, and a service MUX (multiplexer) 340 Although the example shown in Figure 5 uses the first Reed-Solomon encoder 310 and the pre-interleaver 320, these may be omitted or replaced with other (not shown) elements. It is preferable, but not obligatory, that the first Reed-Solomon encoder 310, when used, be used in conjunction with pre-interleaver 320. Pre-interleaver position 320 is interchangeable with that doubler 330.

The first Reed-Solomon 310 encoder encodes by adding parity bytes to the received turbo stream. The pre-interleaver 320 interlaces the turbocharged stream with the added bytes and paxity. The duplicator 330 provides a parity area with respect to turbo-interlaced flow. The parity area provided by the doubler330 will be referred to as the "second parity area" in the following description.

To provide the second parity area, the byte, which is the basic unit of turbo flow, is divided into two or four bytes. A portion of the one-byte bits, and null data such as 0, are then filled into each of the bytes. The null data filled area becomes the parity area.

The service MUX 340 multiplexes the normal stream that is received separately with the turbo processed stream in multiplier 330. While dual TS is generated, the service MUX 340 provides the dual TS for the random choice unit 150.

An exemplary transmission unit structure 200 of the digital broadcast transmission system of Figure 4 will be explained below with reference to the block diagram of Figure 6. As shown in Figure 6, the transmission unit includes a second Reed-Solomon encoder 210, a second interleaver 220, a truss encoder 230, a MUX 240, and a modulator 250. The second Reed-Solomon encoder 210 encodes the dual TS received from deinterleaver 140 by adding parity bytes to the dual TS. More specifically, the second Reed-Solomon 210 encoder inserts parity bytes calculated with respect to the dual TS in the first parity area provided by the parity area generator unit 110.

The second interleaver 220 interlaces the dual TS with the added parity bytes added by the second Reed-Solomon 210 encoder. The relay encoder 230 encodes the dual TS after the dual TS interlaced by the second interleaver 220. The MUX 240multiplexes the dual TS after the encoding of truss by adding segment synchronization and field synchronization to dual TS. Modulator 250 modulates the dual channel TS after multiple multiplexing, and upconverts to an RF channel band signal. Thus, dual TS is transmitted to a variety of channel reception systems. Although not shown in Figure 6 and although not mandatory in all respects, transmission unit 200 may additionally include general components for signal transmission, such as an amplifier. (not shown) that amplifies the modulated signal power of the modulator 250, and an antenna (not shown), and may include elements used for broadcasting within the cable, the Internet, and / or satellite and media systems through which Digital broadcasts can be implemented.

An exemplary structure of the turbo processing unit 130 of the Figure 4 digital broadcast transmission system will be explained below with reference to the block diagram of Figure 7. Referring to Figure 7, the turbo processing unit 130 includes a byte / symbol conversion unit 131, a de-MUX 132, a turbo133 encoder, a turbo interleaver 134, a turbo data MUX 135, and a symbol / byte conversion unit 136. The byte / symbol conversion unit 131, the de-MUX 132, the Turbo data MUX 135, and symbol / byte conversion unit 136 may be omitted, or replaced with other components in other aspects of the invention.

The byte / symbol conversion unit 131 converts the interlaced dual TS basic unit of the first byte interleaver 120 to symbols. Conversion of the basic byte unit to symbol will be readily understood by reference to Table D5.2 of the American ATSC D TV (A / 3) standard, the content of which is incorporated herein by reference in its entirety.

The de-MUX 132 demultiplexes the dual-symbol drive unit to recover turbo flow. The turbo133 encoder calculates parity bytes relative to the turbodetected flow, and encodes the turbo flow by filling the second parity area with the calculated parity bytes. In this particular example, the turbo encoder 133 encodes the unit of each byte of the turbo stream. However, it is understood that other units may be used.

The turbo interleaver 134 interlaces the turbo flow that is coded by convolution. In this example, the twisted twist 134 interlaces in the bit unit. The turbo135 data MUX generates a dual TS by multiplexing the turbo-interlaced stream and the normal stream. More specifically, the turbo data MUX 135 builds a dual TS by filling the fluxoturbo in place before it is detected by the de-MUX 132. The symbol / byte conversion unit 136 converts the basic TS dual unit from symbols to bytes. This conversion will be readily understood by reference to Table D5.2 of the American ATSC D TV Standard (A / 53), the disclosure of which is incorporated by reference.

An example of TableD5.2's byte-to-symbol table is as follows: <table> table see original document page 26 </column> </row> <table> <table> table see original document page 27 </column> > </row> <table>

An exemplary structure of the turbo encoder 133 of the turbo processing unit 130 of Figure 7 will now be explained with reference to the block diagram of Figure 8. According to Figure 8, turbo encoder 133 includes a shift register having three double summing elements. Thus, the turbo encoder 133 convolutionally encodes the data to the recursive systematic convolutional code (RSC) to insert parities in the second parity area.

Figures 9 to 15 show exemplary TSdual structures of the digital broadcast transmission system of Figure 4. Figure 9 shows an example of one. turbo flow packet received by the TS 300 frame unit. The turbo flow packet may comprise 188 bytes, for example. In this case, more particularly, the turbocharged flow packet comprises 1 synchronization byte, which is a header, 3bytes of packet identity ( PID), and 184 bytes of turbo data.

Figure 10 shows an example of a normal stream packet received by the TS 300 frame unit. The normal stream packet may comprise 188 bytes, particularly 1 byte of synchronization which is a header, 2 bytes of an adaptation field header (AF). , N bytes of null data, and 182-N bytes of normal data. The AF header is an area in which information about an adaptation field is recorded, so it contains information such as the location, size, and so on of the adaptation field.

Figure 11 shows an example of a dual TS (or a flow pack) generated by the TS 300 generating unit. In Figure 11, a portion of the turbo flow pack of Figure 9 is inserted into the null data of the normal flow pack of Figure 10. In this version, the dual TS comprises 188 bytes, more particularly 1 byte sync, which is a header, 3 PID bytes, 2 bytes of an AF header, null data Nbytes, and 182-N normal data bytes, which is a payload. . The inserted turbo data shown in Figure 11 may be part of the turbo flow packet of Figure 9. For example, the inserted turbo data of Figure 11 may be minus one synchronization, the PID, and the turbo data of Figure 9.

Figure 12 shows a dual TS generated by the TS generating unit according to another embodiment of the invention. According to the version shown in Figure 12, dual TS includes a plurality of consecutive packets. Turbo data is arranged with respect to a predetermined number of packages. That is, Figure 12 shows that 78-pack turbo streams are inserted into 312-segment packets of a dual TS field. The dual TS comprises 1 packet (188 bytes) of turbo flow and 3 consecutive packets (188 bytes) of normal streams which are repeatedly arranged at the 1: 3 rate.

In the case where 70 packet turbo streams are inserted into 312 segment dual TS packets, the TS dual is structured so that 4 packets comprising one packet (188 bytes) of turbo streams and 3 consecutive packets (188 bytes) of normal streams are repeatedly arranged 70 times, and the remaining 32 packets comprise the normal flow packets.

Figure 13 shows a dual TS package structured by the TS 300 frame unit according to yet another embodiment of the invention. 88 turbo stream packets are inserted into 312 packet segments of a TSdual field. The dual TS is structured so that 4 packets comprising 2 packets (188 bytes) of turbo stream and 2 packets (188 bytes) of normal stream are arranged 10 times, and 4 packets comprising one packet (188 bytes) of turbo stream and three consecutive packets. (188bytes) of normal flows are repeatedly arranged at a 1: 3 rate as shown in Figure 12.

Figure 14 shows the dual TS structured by the TS 300 structure unit, according to yet another embodiment of the invention, which is a joint form of the dual TS shown in Figures 11 and 12. The dual TS is structured so that four packets are arranged repeatedly, four packets comprising a turbo stream packet (188 bytes), a normal stream packet in which SRS data and turbos data are inserted in part of the normal stream packet AF, and two normal stream packets (188 bytes).

Figure 15 shows the dual TS which is structured as 312 segment packets. As shown in Figure 15, packet information, along with turbid data and normal data, is included in dual TS. The packet information can be saved in the option field.

In this case, the option field locations can be designed and fixed so as not to override the turbo data. In Figure 15, "m" denotes a possible length (byte) of turbo data.

According to Figure 15, the option fields safeguarding the number of macro blocks (cutting countdown) are arranged in segments 11, 63, 115, 167,219, 271, while the option fields that recode program clock reference (PCR) ) are arranged in our segments 15, 67, 119.

When dividing the 312 segments into 52-segment units, the option field locations can be expressed as follows:

Program Clock Reference (PCR) (using 6bytes): 52n + 15, n = 0;

Original Program Clock Reference (OPCR) (which uses 6 bytes): 52n + 15, n = 1;

Adaptation field extension length (which uses two bytes): 52n + 15, n = 2;

Transport private data length (which uses five bytes): 52n + 15, n = 3,4,5; and

A number of macro blocks (cutting countdown) (using one byte): 52n + 15, n = 0,1,2,3,4,5

The "transport private data length" of these, for example, exists in segments 171, 223, 275. Dual OTS where turbo data is inserted into null data except the option fields can be structured in many ways in addition to the ways introduced above.

Additionally, the turbo data structural rate can be adjusted according to the dual TS packet structure.

Figure 16 is a block diagram showing a digital broadcast transmission system that transmits a supplemental reference sequence (SRS). Although described in the context of SRS, it is understood that other known training sequences and / or data sets may be implemented in other aspects of the invention. Referring to Figure 16, the digital broadcast transmission system includes a TS 801 frame unit that includes a filler region for inserting SRS data into the TS dual packets, a random choice device 803 that randomizes the TS dual packet (hereinafter referred to simply as "packet"), a supplemental reference sequence insertion unit 805 which inserts the SSR data into the randomized packet filler region, a parity area generating unit 8 07 which generates a first area to insert a parity for the deer correction, a first interleaver 809 which essentially interleaves the packet where the first area is generated, a turbo processing unit 811 which encodes by convolution and interlocks the turbo flow included in the essentially interlaced packet, a deinterleaver 813 which interlaces the packet processed by the processing unit t urbo 811, a Reed-Solomon (RS) 815 encoder that inserts the parity in the first area of the interlaced package, a second interleaver 817 which interleaves the parity packet, a truss encoder 819 that encodes the interlaced packet, a multiplex MUX 823 the lattice-encoded packet by adding a synchronization, and a modulator 825 that modulates per channel and transmits the multiplexed packet. Additionally, a backward-compatible parity generator 821 that generates a compatible parity may also be included.

Known SRS data for channel synchronization and / or equalization may be inserted into the TSdual packet received by the digital broadcast transmission, which will be described in detail with reference to Figure 9. TS 8 01 structure unit receives normal flow and turbo flow structures the packet. TS dual. According to one embodiment of the invention, the dual TS packet may include a filler region for entering known SRS data for channel synchronization and / or equalization therein. The TS 801 structure unit may be constructed in the same manner as explained above with reference to Figure 5, and therefore its description will be omitted for brevity. If the TS 801 frame unit includes the first Reed-Solomon encoder 310 as in the version shown above in Figure 5, the Reed-Solomon encoder of Figure 16 will be referred to as the second Reed-Solomon encoder for the sake of explanation. Known SRS data for channel synchronization and / or equalization will now be described. The filler region may be part of the package which includes a header and a cargo. More particularly, the package still includes a mismatch (AF) field. The filler region as part of AF is positioned so as not to overlap with the option field included in AF. The option field comprises a program clock reference (PCR) used for synchronizing a receiver demodulator, an original PCR (OPCR) used for recording, booking, and reproducing a program on the receiver, four circuit blocks, the number of macro blocks. (clipping countdown) denoting the number of consecutive macro blocks comprising a block Cr and a block Cb, transport private data length denoting the text data length for teletext broadcast, an extension length AF.

According to one embodiment of the invention, the package AF may further include a filler region for inputting data for initialization of relay encoder 809 which will be described hereinafter. Random choice device 803 randomizes the package including filler region.

The SRS 8 05 insertion unit inserts the SRS data into the randomized packet filling region. Here, the SSR data is a reference signal, that is, specific sequence data with a predetermined transmitter and receiver pattern. Since the SRS data is different from the general payload data that transcends the reference signal pattern, the SRS data can be easily detected from the general packets to be transmitted and thus used for receiver synchronization and / or channel equalization. Input of the SRS data into the fill region may be controlled by a predetermined control signal.

The parity area generating unit 807 generates a first area for entering parity for the deer correction in the packet where the SRS data is inserted. As shown, the first area is for entering the parity added by the RS 815 encoder. The first interleaver 809 essentially interleaves the packet where the parity area is generated. The turbo811 convolution processing unit encodes the turbo flow included in the essentially interlaced package and interlocks the convoluted turbocharged flow. The turbo811 processing unit is configured as shown in Figure 7 and operated in the same manner as described with reference to Figure 7.

The deinterleaver 813 deinterlaces the packet output from the turbo processing unit 811. The RS 815 encoder adds parity to the deinterlaced dual TS. In accordance with one embodiment of the invention, the RS 815 encoder, being structured in the form of concatenated code, inserts appearance to correct channel-generated errors in the first area of the packet in which the SRS data is inserted. Second interleaver 817 secondarily interleaves the packet at which parity is inserted. Truss encoder 819 encodes the interleaved packet secondarily.

According to one embodiment of the invention, the relay encoder 819 may be initialized to a predetermined value prior to the SRS data included in the trellis-encoded interlaced packet. Initialization is required due to SRS data. More specifically, truss encoder 819 may generate different encoded results for the same data depending on the previously encoded data. Therefore, the truss coding result of the SRS data may vary according to the data prior to the SRS data, in which case the receiver cannot discriminate the SRS data. To solve such a problem, truss encoder 819 is initialized to a predetermined value just before truss encoding of the SRS data. In other words, the default value is trellis-encoded just before the SRS data is trellis-encoded.

The truss encoder 819 according to one embodiment of the invention may include i) a general mode that trellis encodes the interleaved packet by the interleaver, ii) an initialization method which initializes the trellis encoder 819, and iii) a parity replacement mode that encodes by lattice the compatible parity replaced for all or part of the parity applied by the RS 815 encoder. For this purpose, the lattice encoder 819 may receive a control signal from a control signal generator unit (not shown), the control signal operated in general mode. , in boot mode, or in parity override mode.

When the truss encoder 819 receives a control signal by commanding the start mode while operating in general mode, the truss encoder 819 is operated as the start mode. If it receives a control signal that commands parity override mode while it is operating in general mode, truss encoder 819 is operated in parity override mode. The control signal may be provided from the control signal generating unit (not shown) which is aware of the location of the entered SRS data, the location of the value entered to initialize the truss encoder 819, and the location to replace the matching parity.

The backward compatibility generating unit 821 receives the packet in which parity is added by the RS 815 encoder and the packet encoded by the truss encoder 819, and generates the compatible parity based on the received packages. More specifically, the backward compatibility parity generator unit 821 includes a symbol decoder (not shown) which receives the package encoded by the truss encoder 819 and converts the symbol mapped package to byte shape, a deinterlacing (not shown) deinterlaces the decoded pacing, and a memory (not shown) replaces at least a portion of the packet received with the de-interlaced package and stores the de-interlaced package. Preferably, the memory (not shown) may replace storing only the different part between the received package and the de-interlaced package. For this, the backward compatibility parity generator unit 821 may receive a predetermined control signal from the control signal generating unit (not shown), for example. Memory (not shown) may include an RS encoder (not shown) by adding compatible parity to the package stored in memory, an interleaver (not shown) interlaces the packet where compatible parity is added, and a symbol encoder (not shown) maps by symbol the byte packet to transmit the interlaced packet to relay encoder 819.

The MUX 823 multiplexes the trellis encoded packet by adding segment synchronization and field synchronization to the trellis encoded packet. Modulator 825 performs channel modulation with respect to the packet where segment synchronization and field synchronization are added, upconverts the modulated packet to the signal of an RF channel band, and transmits the converted signals.

Figures 17 to 23 show the structure of a TS package including the SRS according to an embodiment of the invention. Figure 17 shows a turbo stream packet received by the TS 801 frame unit. The turbo stream packet (18 8 bytes) comprises a sync byte which is a header, 3 PID bytes, and 184 turbo data bytes. Figure 18 shows a normal flow packet including a filler region for inserting the known SRS signal for synchronization into the TS frame unit. The normal flow packet (188 bytes) comprises a sync byte which is a header, three PID bytes, two AF header bytes, padding region S-bytes, null data N-bytes, and 182-NS normal data bytes. which is a load. Figure 19 shows a dual TS package that included region. for inserting the known SRS signal for synchronization into frame unit TS according to one embodiment of the invention. More specifically, in Figure 19, part of the turbo flow packet of Figure 17 is inserted into the null data of the normal flow packet of Figure 11B, and the SRS data is inserted into the filler region. In this version, the dual TS comprises 188 bytes, particularly one synchronization byte which is a header, three PID bytes, two AF header bytes, SRS data bytes, null data bytes, and 182-N-Sbytes. of normal data which is the load.

Figure 20 shows a dual TS packet including filler region for inserting the known SRS signal for synchronization into the TS frame unit according to another embodiment of the invention. Unlike the TSdual packet of Figure 11, 78 packet turbo streams are inserted into 312 segment packets of a dual TS field. TSdual is structured so that four packets comprising one packet (188 bytes) of the turbo stream and three consecutive packets (188 bytes) of the normal streams are repeatedly arranged at a 1: 3 ratio. When 70 packets of turbo streams are inserted into 312 segments of dual TS packets, on the one hand, the dual TS is structured so that four packets comprising one packet (188 bytes) of turbo streams and three consecutive packets (188 bytes) of normal streams are repeatedly arranged. 70 times, and the remaining 32 packages comprise the fluxonormal packages.

Figure 21 shows a dual TS package including filler region for inserting the known SRS signal for synchronization into the TS frame unit, according to yet another embodiment of the invention. Unlike the dual TS package of Figure 11, 88-pack turbo streams are inserted into 312-segment packets of a TSdual field. The dual TS is structured so that four packets comprising two packets (188 bytes) of turbo streams and two packets (188 bytes) of normal streams are repeatedly arranged ten times, and four packets comprising one packet (188 bytes) of turbo stream and three consecutive packets. (18 8 bytes) of the normal streams are arranged repeatedly at the 1: 3 ratio as shown in Figure 12.

Figure 22 shows a dual TS packet including filler region for inserting the known SRS signal for synchronization into the TS frame unit, according to yet another embodiment of the invention, which is a joint form of the dual TS packets shown in Figures 19 and 20. The dual TS packet is structured so that four packets are arranged repeatedly, the four packets comprising one packet (188 bytes) of turbo stream, a normal stream packet where SRS data and turbo data are inserted into one part of the packet AF. normal stream, and two packets (188 bytes) of the normal stream packets.

Figure 23 shows the dual TS packet that includes the filler region for inserting the known SRS signal for synchronization into the TS frame unit, in the form of segment packs as shown in Figure 19. Among the 312 segment packets of a dual TS field , turbo data is inserted into a part of the package nonoption field that includes option field data. In Figure 23, 'k' denotes a possible SRS dated byte length. In addition, turbo data is inserted into all SRS data. Here, 'm' denotes a possible length (byte) of turbo data. When dividing the 312 segments by the 52-segment unit, the option field location can be expressed as follows:

Program clock reference (PCR) (using bytes): 52n + 15, n = 0;

Original Program Clock Reference (OPCR) (which uses six bytes): 52n + 15, n = 1;

Adaptation field extension length (which uses two bytes): 52n + 15, n = 2;

Transport private data length (which uses five bytes): 52n + 15, n = 3,4,5; and

Number of macro blocks (count-down count) (using one byte): 52n + 15, n = 0,1,2,3,4,5.

The "transport private data length" between these, for example, exists at the location where n = 3, 4 or 5.

Dual TS where turbo data is entered into null data except the option field can be structured in ways other than the ones introduced above.

Additionally, the turbo data structural rate can be adjusted according to the dual TS packet structure.

Figure 24 is a block diagram showing a digital broadcast reception system according to an embodiment of the invention. Referring to Figure 24, the digital broadcast reception system comprises a modulator 1001, an equalizer 1003, a first processor 1050, and a second processor 1060. The digital broadcast reception system receives dual TS, demodulates dual TS, equalizes dual TS demodulated, decodes by Viterbi and deinterlaces the normal flow of dual-equalized TS, decodes by RS the normal de-interlaced flow, and de-randomizes the normal flow decoded by RS. The digital broadcast reception system decodes turbo and de-interlaces the dual-equalized TS turbo stream, decodes the de-interlaced turbo stream by RS, and de-randomizes the RS-decoded turbo stream. Modulator 1001 performs synchronization and re-modulation detection with respect to the dual-received TS baseband signal. The equalizer 1003 compensates for the channel distortion generated by many of the dual-modulated TS channel, thereby removing interference between received symbols.

The first processor 1050 includes a Viterbi 1017 decoder, a 1021 deinterlacer, an RS1023 decoder, and a non-random choice device 1025. The Viterbi 1017 decoder performs error correction with respect to the normal dual TS equalized flow and decodes error corrected symbols as well. emitting the package symbols. The distributed decoded packet can be rearranged by the deinterleaver 1021. The RS1023 decoder performs error correction with respect to the deinterlaced package. The non-random choice device 1025 de-randomizes the error corrected packet by the RS 1023 decoder. Thus, the normal dual TS stream is restored.

The second processor 1060 includes a turbo decoder 1005, a second deinterlacing 1009, an RS 1011 decoder, a 1013 non-random choice device, and a de-MUX turbo 1015. However, it is understood that the second processor 1060 need not include all of the elements shown, such as de-MUX turbo1015 in all aspects of the invention. The turbo decoder 1005 turbo decodes the dual-equalized TS turbo flow. Turbo decoding is performed by trellis decoding the dual-equalized TS turbo flow, deinterlacing and convolution decoding the trellis decoded turbo flow, formatting by frame the convolution decoded turbo flow, and thus converting the turbo flow as a symbol to byte shape. .

Meanwhile, the 1005 turbo decoder is capable of trellising the normal flow of dual-equalized TS. The normal lattice decoded flow is converted from symbol to byte form using a symbol-byte converter (not shown). The converted normal stream is deinterlaced to remove appearance. Normal flow with parity removed is randomized and restored.

The deinterlacer 1009 deinterlaces the turbo-decoded turbocharged flow. The RS 1011 decoder removes appearance added to the deinterlaced turbo flow. The random choice device 1013 randomizes the turbo flow with parity removed. The de-MUX turbo 1015dultiplexes the randomized turbo flow. The turboqui stream is capable of receiving turbo data between the turbodemultiplexed and frame formatted stream.

Figure 25 is a block diagram of the turbo decode of the digital broadcast reception system of Figure 24. Referring to Figures 24 and 25, the turbo decoder 1005 comprises a truss decoder 2001, a turbo deinterlacer 2003, a turbo decoder 2005, a turbo interleaver 2007, a frame formatter 2009, and a symbol / byte conversion unit 2011.

The 2007 lattice decoder decodes by equalized dual TS lattice. According to this version, the 2007 lattice decoder will be able to decode the dual TS turbo stream per-lattice as well as a smooth-decoding turbo stream that is interlaced by turbo. The turbo deinterlacer 2003 deinterlaces the trellis-decoded turbodecrew. The 2005 turbo decoder convolution decodes the de-interlaced turbo flow, thus issuing a soft decision or a rigid decision.

"Soft decision" refers to a value that includes information on a turbo flow metric. For example, when the turbo flow metric is "1" and when the fluxoturbo metric results in "0.8", the soft decision value "0.8" is issued. When the turbo flow metric results in "1", the rigid precision, ie the turbo flow, is emitted.

The 2007 turbo interlacer intertwines the rigid-decision turbo flow that is decoded by convolution. Frame Formatter 2009 formats the convoluted decoded hard decision turbo flow that corresponds to the dual DOTS frame.

Operation of the 2011 symbol / byte converter to convert the frame-shaped turbo flow from the symbol to byte shape can easily be understood with reference to ATSC D TV Table D5 .2 (A / 53) as explained above.

Figure 26 is a flowchart for explaining an example of a signal processing method in the digital broadcast transmission system of Figure 6. Referring to Figure 26 and Figure 6, the TS 300 frame unit receives normal flow and turbo flow, generates the second area to insert parity into the received turbo flow, multiplies the received normal flow and the turbo flow where the second area is generated, thus structuring the dual TS (S1201). The random choice device 150 randomizes the dual TS issued from frame unit TS 300 (S1203). The parity area generator 110 generates the first area to enter parity for error correction in dual randomized TS (S1205). The first interleaver 120 essentially intertwines the dual TS where the parity area is generated (S12 07), and the turbo processing unit 130 convolves the turbo flow included in the dual interlaced TS and interleaves the convoluted turbocoded flow (S1209). The deinterleaver 140 de-interlaces the dual TS emitted from the turbocharged processing unit 130 (S1211). The RS 210 encoder inserts the first area parity of the deinterlaced dual TS (S1213).

The second interleaver 220 secondarily intertwines the dual TS where parity is inserted (S1215). Truss coder 230 trusses the secondary TS interlaced (S1217). The MUX 240 multiplexes the trellis dual-coded TS by adding segment synchronization and field synchronization (S1219). The modulator 250 modulates the multiplexed dual TS, upconverts the dual TS to a radio frequency (RF) channel band signal, and transmits the upward converting signal (S1221).

Figure 27 is a flowchart for explaining an example of a signal processing method in the turbo-processing unit of Figure 7. Referring to Figure 27e and Figure 7, the byte-symbol converter 131 converts the essentially interlaced TSdual from byte to shape. of symbol (S1301). The de-MUX TS 132 demultiplexes the converted TSdual to symbol form within the normal flow and turbo flow (S1303). The turbo encoder 133 convolutedly encodes the turbo flow of the dual-multiplexed TS (S1305).

Through convolution coding, the turbo flow parity is additionally generated and inserted into the second area of the turbo flow. The turbo interleaver 134 interlaces the convolution-coded turbo flow (S1307). The turbo data MUX 135 multiplexes the turbo-interlaced flow and the demultiplexed normal flow, thereby structuring the dual TS (S1309). The symbol-byte136 converter converts the dual TS from symbol shape to debyte shape (S1311).

Figure 28 is a flowchart for explaining an example of a signal processing method in the digital irradiation receiving system of Figure 24. Referring to Figure 28 and Figure 24, demodulator 1001 detects and demodulates synchronization according to the synchronization added to the band signal. basis of the received TSual (S1401). Equalizer 1003 compensates for multi-channel channel distortion generated from the dual-modulated TS channel, thereby removing interference between received symbols (S1403).

The Viterbi 1005 decoder of the first processor1050 performs error correction against equalized dual TS normal flow, decodes the deerro corrected symbol, and outputs the symbol packet (S1405). The distributed decoded package is rearranged by the deinterleaver 1009 (S1407). The RS 1023 decoder performs the deerroot correction with respect to the deinterlaced packet (S14 09). The random choice device 1025 randomizes the error corrected package by the RS 1023 (S1411) decoder. Thus, the normal flow of dual TS is restored.

The second processor 1060 turbo decoder 1005 turbo decodes the equalized dual TS turbo stream (S1413). Turbo decoding is performed by lattice decoding of the dual-equalized TS turbo flow by de-interlacing and decoding the truss-decoded turbo stream, by formatting the convolution-decoded turbo stream, and thereby converting the turbo flow from the symbol form to the debyte shape. The deinterlacing 1009 deinterlaces the turbo-decoded turbodrive flow (S1415). The RS 1011 decoder removes the parity added to the turbocharged flow (S1417). The random choice device 1013 de-randomizes the turbo-removed flow-parity (S1419). The de-MUX turbo 1015 demultiplexes the randomized fluxoturbo (S1421). The turbo stream here is able to derive turbo data between the demultiplexed turbo stream formatted to the frame form.

Figure 29 is a flowchart for explaining an example of a signal processing method in the turbo decoder of Figure 25. Referring to Figure 29 and Figure 25, the truss decoder 2007 of the turbo1005 decoder decodes the equalized dual TS ( S1501), the turbo deinterlacing 2003 deinterlaces the lattice turbodecoded flow (S1503), and the turbo2005 decoder by convolution decodes the deinterlaced turbo flow (S1507), thus emitting soft decision or rigid decision. Here, the soft decision refers to a value that includes information on a turbo flow metric. For example, when the turbo flow metric is "1" and when the turbo flow metric results in "0.8", the soft decision value "0.8" is issued. When the turbo flow metric results in "1", the rigid decision, that is, the turbo flow is issued. The smooth emitted precision is interlaced through the turbo interleave 2007 (S1505) and decoded by truss for error correction. Therefore, the above processes are repeated until the turbo flow metric becomes "1" to give the rigid decision. Details of turbo coding per se are not provided as they are well known in the technology.

Further, the invention is not limited to turbo coding, and aspects of the invention may use other types of decoding in place of or in addition to turbo coding.

The 2009 Frame Formatter formats the convoluted hard-decoding convoluted turbo stream corresponding to the dual TS frame (S1509). The symbol-byte converter 2011 will be able to convert the frame-shaped turbo flow from symbol shape to byte shape (S1511).

Claims (33)

Method for processing a digital broadcast signal, comprising: preparing a first area for parity insertion with respect to a dual transport stream (TS) which includes multiplexed normal flow with a turbo stream; first area; detect the interlaced dual TS turbo flow, uniquely encode the detected turbo flow, and fill the dual TS encoded turbo flow for turbo processing; deinterlace the turbo-processed dual TS; transmit the dual-turbo-processed dual TS; receive the TS dual transmitted; demodulate the received dual TS; equalize the demodulated dual TS; decode the normal flow of the equalized dual TS to retrieve a normal data packet; and decode the equalized dual TS turbo stream to retrieve a turbo data packet. Method according to claim 1, characterized in that it further comprises, prior to preparing the first area, preparing a second area for the insertion of the turbo flow disparity; Generate the dual TS by multiplexing the turbo flow having the second area to enter parity with the normal flow. Method according to Claim 1, characterized in that the turbocharged flow detection comprises: detecting the turbo flow by demultiplexing the dual TS that is interlaced, encoding the detected turbo flow by inserting a parity with the detected turbo flow within a second area created for parity insertion, interlacing the encoded turbo stream; Generate dual TS by multiplexing turbo-interlaced flow and normal flow. Method according to claim 3, characterized in that the turbocharged flow detection further comprises: converting a debyte interlaced dual TS basic unit to a symbol; and convert the basic unit of the generated dual TS from one symbol to one byte. Method according to claim 1, characterized in that the transmission of the de-interlaced TS comprises: encoding by inserting a parity with respect to the de-interlaced TS within the first area for the insertion of parity; interlacing the encoded dual TS; Interleaved dual TS multiplexing by adding a truss-encoded dual TS sync signal; channel the dual multiplexed TS and transmit the resulting stream. Method according to claim 1, characterized in that: the dual TS comprises a field containing a plurality of consecutive packets, the option field which records a predetermined type of packet information therein is arranged in the packet which is located in predetermined field position without overlapping turbo flow; and the option field comprises a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown that indicates the number of macro blocks, a transport private data length, and / or an extension length. adaptation field. Method according to claim 1, characterized in that: the dual TS comprises a field containing a plurality of consecutive packets; and turbo flow and normal flow are arranged in the plurality of packets, respectively. Method according to claim 1, characterized in that the decoding of normal flow comprises: decoding in which an error is corrected with respect to the normal flow of equalized dual TS and the corrected normal flow of error is decoded; decoded by the Viterbi decoder, correct a deinterlaced normal flow error; and recover the normal data packet by randomizing the error corrected normal flow. Method according to Claim 1, characterized in that the turbocharged flow decoding comprises: turbo decoding the dual-equalized TS turbo flow, deinterlacing the turbo-decoded turbo flow, Reed-Solomon decoding the turbocharged flow; and randomize the turbo stream decoded by Reed-Solomon. A method according to claim 1 further comprising: inserting an additional reference sequence into a dual TS filler area that includes a normal multi-multiplexed flow with a turbo flow; and equalize the demodulated dual TS using the supplemental reference sequence retrieved from the filler area when compared to an additional reference sequence stored at the receiver. A method according to claim 10, further comprising multiplexing the normal flow and the turbo flow to generate the dual TS, and preparing the filling area in the dual TS. A method according to claim 11, further comprising, prior to entering the supplemental reference sequence, randomizing the dual TS having the filler area therein. Method according to Claim 11, characterized in that the normal flow and turbo flow multiplexing comprises preparing a second area for insertion of parity with respect to the turbo flow. Method according to claim 10, characterized in that: the dual TS is in the form of a frame comprising a plurality of consecutive packets, each package comprising an adaptation field; and the filling area is at least a part of the adaptation field. Method according to claim 14, characterized in that the dual TS comprises the flow path arranged in the frame packets at predetermined packet intervals. Method according to claim 14, characterized in that the dual TS comprises an option field disposed in the package located at a predetermined position of the field which does not overlap the turbo flow, the filling area being at least a part of the adaptation field excluding the option field; and the option field comprises a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown that indicates the number of macro blocks, a transport private data length, and / or an extension length. adaptation field. A digital broadcasting system comprising: a transmission source comprising: a parity area generating unit which prepares a first area for parity insertion with respect to a dual transport (TS) stream that includes a normal multi-multiplexed stream with a single stream. turbo; a first interleaver that intertwines the dual TS that is transmitted from the parity area generating unit; a turbo processing unit that detects the intertwined dual TS fluxoturbo, encoding exclusively the turbo flow detected for turbo processing, and fills the encoded turbo flow within dual TS: a deinterlacing that deinterlaces the dual TS that is processed by the turbo processing unit; a transmission unit transmitting dual TS that is processed in the deinterleaver / digital broadcast receiver system comprising: a demodulator that receives a dual transport stream (TS) and demodulates the received dual TS, an equalizer that equalizes the demodulated dual TS a first processor that decodes the equalized dual TS normal stream and outputs a normal data packet; It is a second processor that decodes the dual equalized DOTS turbo stream and outputs a turbo data packet. Digital broadcasting system according to claim 17, characterized in that the first processor comprises: a Viterbi decoder which corrects an error with respect to the normal dual equalized TS flow and decodes the error corrected normal flow; deinterlaces the normal flow that is decoded by the Viterbi decoder: a first Reed-Solomon decoder that corrects a normal flow error that is processed in the first deinterleaver; It is a non-random choice device that recovers the normal data package by randomizing the error-corrected normal stream; and the second processor comprises: a turbo decoder that decodes dual equalized DOTS turbo flow, a second deinterlacing that deinterlaces the turbo decoded fluxoturbo, a second Reed-Solomon decoder that decodes de-interlaced turbo flow; It is a nonrandom choice device that randomizes the turbo stream decoded by Reed-Solomon. Digital broadcasting system according to claim 17, characterized in that: the dual TS comprises a field containing a plurality of consecutive packets, and the turbo flow and normal flow are arranged in the plurality of packets, respectively. Digital broadcasting system according to claim 17, characterized in that: the dual TS comprises a field containing a plurality of consecutive packets, an option field therein which records a predetermined type of packet information, is arranged in the packet in a packet. predetermined field position that does not overlap turbo flow; and the option field comprises at least one of a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown indicating the number of macro blocks, a transport private data length, and a length extension of the adaptation field. Digital broadcasting system according to claim 17, characterized in that it further comprises: a TS frame unit which generates dual TS to multiply normal flow and turbo flow; A randomization unit that randomizes the dual TS that is generated in the TS frame unit, and provides the generated TSdual for the parity area generating unit. Digital broadcasting system according to claim 21, characterized in that the TS unit comprises: a duplicator preparing a second area for insertion of parity with respect to the turbo flow; It is a service MUX that multiplexes the turbo stream that is processed in the duplicator, and the normal stream, and outputs the resulting flux. Digital broadcasting system according to claim 22, characterized in that the TS structure unit further comprises: a first Reed-Solomon encoder encoding an externally received turbo stream; It is a pre-interleaver that intertwines the turbocharged flow and provides the resulting flow to the duplicator. Digital broadcasting system according to claim 22, characterized in that the turbo-processing unit comprises: a de-MUX that demultiplexes the dual TS which is interlaced in the first interleaver and detects turbo flow, a turbo encoder that encodes turbo flow by inserting a parity with respect to the turbo flow that is detected by de-MUX within the second parity insertion area: a turbo interleaver that interlaces the turbo flow that is processed in the turbo encoder; It is a turbo data MUX that structures the dual transport flow (TS) by multiplexing the turbo flow that is processed in the turbo interleaver, and the normal flow that is multiplexed in de-MUX. Digital broadcasting system according to claim 17, characterized in that: the transmission source further comprises an additional reference signal input unit receiving dual OTS, and inserts an additional reference signal into a fill area provided in the Dual TS; and the equalizer equalizes the demodulated dual TS using the additional reference signal extracted from the fill area compared to an additional reference signal stored at the receiver. Digital broadcasting system according to claim 25, further comprising: a transport flow structure unit (TS) which generates the dual TS by multiplexing the normal flow and the fluxoturbo, and preparing the filling area in the Dual TS; A randomization unit that randomizes the dual-frame TS provided from the TS frame unit and provides the randomized flow to the additional reference signal insertion unit. Digital diffusion system according to claim 26, characterized in that the TS structure unit comprises: a duplicator preparing a second area for insertion of parity with respect to the turbo flow; A service MUX that multiplexes the turbo flow and normal flow that is processed in the duplicator, prepares the fill area, and outputs the resulting flow. Digital broadcasting system according to claim 27, characterized in that the TS structure unit further comprises: a first Reed-Solomon encoder which performs Reed-Solomon encoding with respect to an externally received turbo stream; It is a pre-interleaver that intertwines the turbocharged flow and provides the resulting flow to the duplicator. Digital broadcasting system according to claim 25, characterized in that the TS dual comprises a frame containing a plurality of consecutive packets, with each packet comprising an adaptation field, and the padding area being at least a portion of the adaptation field. 30. Digital broadcasting system according to claim 29, characterized in that: the dual TS comprises an option field disposed in the package at a location of the adaptation field that does not overlap the turbo flow, the filling area is at least one. part of the adaptation field that excludes the option field; and the option field comprises a program clock reference (PCR), an original program clock reference (OPCR), a clipping countdown that indicates the number of macro blocks, a transport private data length, and / or an extension length. adaptation field. Method according to claim 6, characterized in that the field comprises 312 packets, and when the 312 packets are divided into units of 52 packages each, the option field is located in the field as follows: Program Clock Reference (PCR) : 52n + 15, n = 0; Original Program Clock Reference (OPCR): 52n + 15, n = 1Adaptive Field Extension Length: 52n + 15, n = 2Private Transport Data Length: 52n + 15fn = 3,4,5; e Cutout countdown: 52n + 19, n = 0.1,2,3,4,5. 32. Digital broadcasting system according to claim 20, characterized in that the field comprises 312 packages, and when the 312 packages are divided into units of 52 packages each, the option field is located in the field as follows: Program clock reference ( PCR): 52n + 15, n = 0; Original Program Clock Reference (OPCR): 52n + 15, n = 1; Adaptation Field Extension Length: 52n + 15, n = 2Private Transport Data Length: 52n + 15, n = 3.4.5; e Cutout countdown: 52n + 19, n = 0.1,2,3,4,5. 33. Digital broadcasting system according to claim 30, characterized in that the field comprises 312 packages, and when the 312 packages are divided into units of 52 packages each, the option field is located in the field as follows: Program clock reference ( PCR): 52n + 15, n = 0; Original Program Clock Reference (OPCR): 52n + 15, n = 1; Adaptation Field Extension Length: 52n + 15, n = 2Private Transport Data Length: 52n + 15, n = 3.4.5; e Cutout countdown: 52n + 19, n = 0.1,2,3,4,5.