KR20100086406A - Transmitting/receiving system and method of processing data in the transmitting/receiving system - Google Patents

Abstract

PURPOSE: A transmitting/receiving system and a method of processing data in the transmitting/receiving system are provided to transmit known data after inserting known data to a partial area of a mobile service data area, thereby increasing performance of receiving a receiving system. CONSTITUTION: A demodulator(711) demodulates mobile service data. A pre-signaling decoder(721) decodes pre-signaling data allocated in the first lot of a sub frame. A post-signaling decoder(723) decodes post-signaling data allocated after the pre-signaling data. A block decoder(713) turbo-decodes the demodulated mobile service data.

Description

Transmitting / receiving system and method of processing data in the transmitting / receiving system}

The present invention relates to a transmission system for transmitting digital broadcast, a reception system for receiving digital broadcast transmitted from a transmission system, and a data processing method in the transmission / reception system.

In the digital broadcasting, VSB (Vestigial Sideband) transmission method adopted as a digital broadcasting standard in North America and Korea is a single carrier method, so the reception performance of the receiving system may be degraded in a poor channel environment. In particular, in the case of a portable or mobile broadcast receiver, since the robustness against channel change and noise is further required, when the mobile service data is transmitted by the VSB transmission method, the reception performance of the reception system is further degraded.

An object of the present invention is to provide a transmission / reception system and a data processing method that are resistant to channel variation and noise.

It is another object of the present invention to transmit / receive a system and a data processing method for improving the reception performance of a receiving system by inserting and transmitting known data known by a promise of a transmitting / receiving party into a partial area of a mobile service data area. In providing.

Another object of the present invention is to provide a transmission / reception system and a data processing method for providing mobile services of different formats.

Another object of the present invention is to provide a transmission / reception system and a data processing method for providing a mobile service using a full channel.

In order to achieve the above object, the reception system according to an embodiment of the present invention may include a demodulator, a pre-signal decoder, a post-signal decoder, and a block decoder. One transport frame is composed of a plurality of subframes, one subframe is composed of a plurality of slots, and the demodulator is allocated to some segments of at least one slot based on the decoded pre-signaling data. Demodulate the data. The pre signaling decoder decodes the pre signaling data allocated to the first slot of the subframe and outputs the pre signaling data to the demodulator. The post signaling decoder decodes the post signaling data allocated and received after the pre signaling data. The block decoder turbo decodes the demodulated mobile service data based on the decoded post signaling data.

The last segment of the slot to which the mobile service data is allocated is assigned and received a predetermined sequence of known data by an appointment of a transmitting / receiving side.

The mobile service data is data for a second mobile service, and when data for the first mobile service is allocated to some segment of a slot to which the mobile service data is allocated, the mobile service data is transmitted to a segment next to the data for the first mobile service. / The predetermined known data string is allocated and received by the receiving party's appointment.

The block decoder performs trellis decoding on mobile service data for the second mobile service, and then turbo decodes the data using a Parallel Concatenated Convolutional Code (PCCC) scheme.

In the data processing method of the reception system according to an embodiment of the present invention, one transmission frame is composed of a plurality of subframes, one subframe is composed of a plurality of slots, and at least based on the decoded pre-signaling data. Demodulating mobile service data allocated to and received in some segments of one slot; Decoding pre-signaling data allocated and received in the first slot of the subframe; Decoding post-signaling data allocated and received after the pre-signaling data; And turbo decoding the demodulated mobile service data based on the decoded post signaling data.

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

The transmission / reception system and the data processing method according to the present invention have a strong advantage against errors when transmitting mobile service data through a channel. In particular, the present invention has the advantage that the mobile service data can be received without error even in a ghost and noisy channel. The present invention can improve the reception performance of the reception system in an environment with a high channel change by inserting and transmitting known data in a specific position of the data area.

In addition, the present invention may process not only the data for the first mobile service received by receiving a portion of the channel but also the data for the second mobile service received through the full channel to serve the user.

In particular, the present invention is more effective when applied to portable and mobile receivers in which channel variation is severe and robustness to noise is required.

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

Definition of terms used in the present invention

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

Among the terms used in the present invention, the main service data is data that can be received by the fixed receiving system and may include audio / video (A / V) data. That is, the main service data may include A / V data of a high definition (HD) or standard definition (SD) level, and may include various data for data broadcasting. Known data is data known in advance by an appointment of the transmitting / receiving side.

Among terms used in the present invention, M / H (or MH) is the first letter of each of a mobile and a handheld, and is a concept opposite to a fixed form. The M / H service data includes at least one of mobile service data and handheld service data, and for convenience of description, the M / H service data may be referred to as mobile service data. In this case, the mobile service data may include not only M / H service data but also any service data indicating movement or portability, and thus the mobile service data will not be limited to the M / H service data.

The mobile service data defined as described above may be data having information such as a program execution file, stock information, or the like, or may be A / V data. In particular, the mobile service data may be A / V data having a smaller resolution and a smaller data rate than the main service data as service data for a portable or mobile terminal (or broadcast receiver). For example, if the A / V codec used for the existing main service is an MPEG-2 codec, the MPEG-4 codec that has better image compression efficiency as the A / V codec for mobile services. AVC (Advanced Video Coding), SVC (Scalable Video Coding), or the like may be used. In addition, any kind of data may be transmitted as the mobile service data. For example, TPEG (Transport Protocol Expert Group) data for broadcasting traffic information in real time may be transmitted as mobile service data.

In addition, data services using the mobile service data include weather services, transportation services, securities services, viewer participation quiz program, real-time polls, interactive educational broadcasting, game services, drama plot, characters, background music, shooting location, etc. Informational services, information on past sports history, profile and performance of athletes, and information on programs by media, time, or subject that enables product information and ordering. Etc., but the present invention is not limited thereto.

The present invention may transmit data for a mobile service using a portion of channel capacity in which data for a main service has been transmitted, or use a channel capacity in which data for a main service has been transmitted for a mobile service. You can also send data.

For convenience of description, the present invention refers to a mobile service provided by using a part of channel capacity as the first mobile service (or M / H 1.0 service), and the mobile service data at this time is referred to as first mobile service data. (Or M / H 1.0 service data). The latter provides a mobile service using all channel capacity as a second mobile service (or M / H 2.0 service), and the mobile service data at this time is referred to as second mobile service data (or M / H 2.0 service data). Shall be.

The data for the first mobile service is data necessary for the first mobile service and includes first mobile service data, known data for the first mobile service, and signaling data for the first mobile service. According to an embodiment of the present invention, the signaling data includes transmission parameter channel (TPC) data and fast information channel (FIC) data.

The data for the second mobile service is data necessary for the second mobile service and includes second mobile service data, known data for the second mobile service, and signaling data for the second mobile service. The signaling data includes pre signaling data and post signaling data, and the post signaling data includes TPC data and FIC data. The TPC data may include common-TPC data and parade-TPC data. A detailed description of each signaling data will be given later.

The present invention may transmit only data for the second mobile service, or simultaneously transmit data for the first mobile service and data for the second mobile service.

According to an embodiment of the present invention, a transmission unit of data for the first mobile service and data for the second mobile service is an FC-M / H frame (also referred to as an M / H frame). For example, only data for a second mobile service may exist on one FC-M / H frame, and data for a first mobile service and data for a second mobile service may coexist.

At this time, one FC-M / H frame consists of K1 M / H subframes (or subframes), one M / H subframe consists of K2 VSB frames, and one VSB frame is K3. M / H slots (or slots). In the present invention, K1 is set to 5, K2 is set to 4, and K3 is set to 4 according to one embodiment. The values of K1, K2, and K3 presented in the present invention are preferred embodiments or simple examples, and thus the scope of the present invention is not limited to the above numerical values.

FIG. 1 shows an embodiment of an FC-M / H frame structure for transmitting / receiving data for first and second mobile services according to the present invention. 1 shows that one FC-M / H frame consists of five M / H subframes, one M / H subframe consists of four VSB frames, and one VSB frame contains four M / H slots. An example is shown. In this case, this means that one FC-M / H frame includes five M / H subframes, 20 VSB frames, and 80 M / H slots.

One M / H slot consists of 156 segments (or segments). This is half the size of the VSB field. At this time, two VSB fields are combined to form one VSB frame.

2 illustrates an example of a VSB frame structure, in which one VSB frame includes two fields (ie, odd field and even field). Each field consists of one field sync segment and 312 segments. That is, it can be seen that two M / H slots are gathered to form one field, and two fields are gathered to form one VSB frame. Therefore, one M / H slot includes 156 segments.

3 illustrates an embodiment of an M / H slot structure according to the present invention, wherein the M / H slot is a basic time period for multiplexing data for a first mobile service and data for a second mobile service. One M / H slot may include only data for the second mobile service or may include both data for the first and second mobile services.

3 shows an example of mapping of the first 4 M / H slot positions of an M / H subframe with respect to one VSB frame in a spatial domain.

Referring to FIG. 3, the first segment (# 0) of the first M / H slot (M / H Slot # 0) is mapped to the first segment of the odd VSB field, and the second M / H slot # The first segment (# 0) of 1) is mapped to the 157th segment of the odd VSB field. In addition, the first segment (# 0) of the third M / H slot (M / H Slot # 2) is mapped to the first segment of the even VSB field, and the fourth segment of the fourth M / H slot (M / H Slot # 3) is The first segment # 0 is mapped to the 157th segment of the even VSB field. Similarly, the remaining 12 M / H slots in the corresponding M / H subframe are mapped in the same way to the subsequent VSB frames.

In one embodiment, if only data for the second mobile service is transmitted in one FC-M / H frame, the second mobile service may be allocated to each M / H slot (ie, 156 segments) in the FC-M / H frame. Data can be assigned and transmitted.

In another embodiment, if data for the first mobile service and data for the second mobile service are transmitted together in one FC-M / H frame, first the data for the first mobile service is transmitted to the FC-M / H frame. It allocates to a portion of the corresponding M / H slot, and allocates and transmits data for the second mobile service to the remaining area in the FC-M / H frame.

Here, the data for the first mobile service is allocated to a part of a specific M / H slot in the FC-M / H frame and transmitted according to a predetermined rule. Data for the first mobile service may be allocated to all 80 M / H slots in the FC-M / H frame or may be allocated to only some M / H slots among the 80 M / H slots. In this case, data for the first mobile service is allocated to some segments of the corresponding M / H slot.

For example, if data for the first mobile service is allocated to 96 segments of the first M / H slot and the fifth M / H slot of each M / H subframe in the FC-M / H frame, the second mobile service The data for the data includes the remaining 60 segments of the first M / H slot and the fifth M / H slot of each M / H subframe in the FC-M / H frame, and all remaining data for which the data for the first mobile service is not allocated. It can be allocated to 156 segments of the M / H slot.

According to an embodiment of the present invention, the data for the first mobile service constitutes a data group, and one data group is allocated to one M / H slot.

One data group may be divided into one or more layered areas, and each area of the data group may be classified based on reception performance in the data group, for example.

According to an embodiment of the present invention, one data group is divided into A, B, C, and D regions.

FIG. 4 is a diagram in which one data group is arranged in a plurality of segments, and FIG. 5 is an enlarged part of the data group of FIG. 4 to help understand the present invention.

That is, the data structure as shown in FIG. 4 is transmitted to the receiving system. 4 shows an example in which one data group is distributed to 170 segments.

4 shows an example of dividing a data group into ten M / H blocks (M / H blocks B1 to B10). Each M / H block has a length of 16 segments. In FIG. 4, the first five segments of the M / H block B1 and the five segments after the M / H block B10 allocate only RS parity data position holders to some of them, and exclude them from the areas A to D of the data group. do.

In other words, assuming that one data group is divided into A, B, C, and D areas, each M / H block is allocated to any one of the A to D areas according to the characteristics of each M / H block in the data group. Can be included.

In the case of the M / H blocks B4 to M / H block B7 in the data group of FIG. 4, a long known data string is inserted before and after each M / H block. In the present invention, the M / H blocks B4 to M / H blocks B7 having the known data string are referred to as an A region (= B4 + B5 + B6 + B7). As described above, in the case of the area A having a known data sequence back and forth for each M / H block, the receiving system can perform equalization using channel information obtained from the known data, and thus the strongest equalization among the areas A to D. You can get performance.

In the case of M / H block B3 and M / H block B8 in the data group of FIG. 4, a long known data string exists only on one side of each M / H block. That is, M / H block B3 has a long known data string only after the corresponding M / H block, and M / H block B8 has a long known data string only before the corresponding M / H block. In the present invention, the M / H block B3 and the M / H block B8 will be referred to as a B region (= B3 + B8). As described above, in the case of the B region in which the known data string exists in only one of each M / H block, the receiving system can perform the equalization using the channel information obtained from the known data. Robust equalization performance can be obtained.

In the case of the M / H block B2 and the M / H block B9 in the data group of FIG. 4, both M / H blocks cannot insert a long known data stream back and forth. In the present invention, the M / H block B2 and the M / H block B9 are referred to as a C region (= B2 + B9).

Similarly, in the case of the M / H block B1 and the M / H block B10 in the data group of FIG. 4, both M / H blocks cannot insert long known data streams back and forth. In the present invention, the M / H block B1 and the M / H block B10 will be referred to as a D region (= B1 + B10). Since the C / D region is far from the known data stream, the reception performance may be poor when the channel changes rapidly.

The size of the data group described above, the number of layered regions in the data group and the size of each region, the number of M / H blocks included in each region, the size of each M / H block, and the like are one for describing the present invention. The present invention is not limited to the above-described example only because it is an embodiment of.

FIG. 6 shows an example of a data group assignment order allocated to one M / H subframe among five M / H subframes constituting the FC-M / H frame. For example, the method of allocating data groups may be equally applied to all FC-M / H frames or may be different for each FC-M / H frame. In addition, the same may be applied to all M / H subframes in one FC-M / H frame, or may be differently applied to each M / H subframe. In this case, it is assumed that the data group allocation is equally applied to all M / H subframes in the FC-M / H frame, and the number of data groups allocated to one FC-M / H frame is a multiple of five.

According to an embodiment of the present invention, a plurality of consecutive data groups are allocated as far apart from each other as possible in an M / H subframe. This makes it possible to respond strongly to burst errors that can occur within one M / H subframe.

For example, assuming three groups are allocated to one M / H subframe, the first M / H slot (M / H Slot # 0) and the fifth M / H slot ( M / H Slot # 4) and the ninth M / H Slot (M / H Slot # 8).

FIG. 6 shows an example in which 16 data groups are allocated to one M / H subframe by applying such an allocation rule, and 0,8,4,12,1,9,5,13,2,10 It can be seen that data groups are allocated to 16 M / H slots in the order of 6, 14, 3, 11, 7, and 15, respectively.

Equation 1 below expresses a rule for allocating data groups to one M / H subframe as described above.

j = (4i + O) mod 16

Where O = 0 if i <4,

        O = 2 else if i <8,

        O = 1 else if i <12,

        O = 3 else.

In addition, j is an M / H slot number in one M / H subframe and may have a value between 0 and 15. I is a data group number, and may have a value between 0 and 15.

According to the present invention, when one data group is allocated to one M / H slot by applying an allocation rule as shown in Equation 1, only data corresponding to 96 segments, that is, data corresponding to 96 segments in the M / H slot, are included. In one embodiment, the / H slot is allocated.

For example, assuming three data groups are allocated to one M / H subframe, the first M / H slot (M / H Slot # 0) and the fifth M / H slot in the M / H subframe. Each 96 segment of the (M / H Slot # 4) and the ninth M / H Slot (M / H Slot # 8) is allocated data of the A / B area in the corresponding data group.

Meanwhile, according to the present invention, a group of data groups having the same FEC parameters in the FC-M / H frame and mapped to the same RS frame is referred to as a parade for the first mobile service (ie, M / H 1.0 service). Shall be.

In addition, a collection of segments having the same FEC parameter in the FC-M / H frame and mapped to the same RS frame will be referred to as a parade for a second mobile service (ie, M / H 2.0 service).

That is, the parade for the first mobile service is also mapped to one RS frame, and the parade for the second mobile service is also mapped to one RS frame.

The first mobile service data in one RS frame may be allocated to all of the A / B / C / D areas in the data group or may be allocated to only one of the A / B areas and the C / D areas. That is, in the latter case, the RS frame allocated to the A / B area in the data group and the RS frame allocated to the C / D area are different. In the present invention, for convenience of description, the RS frame allocated to the A / B area in the data group is called a primary RS frame, and the RS frame allocated to the C / D area is referred to as a secondary RS frame. frame). In addition, an RS frame allocated to an A / B / C / D region in a data group may be referred to as a primary RS frame.

According to an embodiment of the present invention, the first mobile service data in one RS frame is allocated to the A / B area in the data group.

That is, the RS frame mode is one parade transmits a primary RS frame allocated to all of the A / B / C / D region in the data group, or a primary allocated to the A / B region in the data group It indicates whether to transmit at least one of the RS frame and the secondary RS frame allocated to the C / D region.

Table 1 below shows an example of an RS frame mode.

In Table 1, 2 bits are allocated to indicate an RS frame mode. Referring to Table 1, if the RS frame mode value is 00, it indicates that one parade transmits a primary RS frame allocated to all of the A / B / C / D regions in the data group. If the RS frame mode value is 01, it indicates that one parade transmits at least one of a primary RS frame allocated to the A / B region in the data group and a secondary RS frame allocated to the C / D region. One or more parades are transmitted in one FC-M / H frame.

7 is a diagram illustrating an example of transmitting a single parade in one FC-M / H frame for the first mobile service. That is, FIG. 7 illustrates an embodiment of allocating a single parade having three data groups included in one M / H subframe to one FC-M / H frame.

Referring to FIG. 7, three data groups are sequentially allocated to one M / H subframe at 4 M / H slot periods, and this process is performed for five M / H subframes in the corresponding FC-M / H frame. 15 data groups are allocated to one FC-M / H frame. The 15 data groups are data groups included in one parade. Therefore, one M / H subframe is composed of four VSB frames, but one M / H subframe includes three data groups. Therefore, one VSB frame of four VSB frames in one M / H subframe is included. Is not assigned a data group for the parade.

Meanwhile, if a plurality of parades are transmitted in one FC-M / H frame for the first mobile service, the parades may be allocated as far away from each other as possible in the M / H subframe as in the data group assignment. Yes. That is, data groups in other parades allocated to one FC-M / H frame are also allocated in 4 M / H slot periods, respectively.

At this time, the data group of another parade may be allocated in a kind of circular manner from the M / H slot to which the data group of the previous parade is not allocated. For example, assuming that data group allocation for one parade is performed as shown in FIG. 7, the data group for the next parade is allocated from the twelfth M / H slot in one M / H subframe. This is one embodiment, and in another example, the data group of the next parade is sequentially sequenced from another M / H slot in one M / H subframe, for example, from the third M / H slot to the 4 M / H slot period. You can also assign.

This makes it possible to respond strongly to burst errors that can occur within one M / H subframe.

In addition, the method of allocating parades may be differently applied to each FC-M / H frame based on the FC-M / H frame, and may be equally applied to all FC-M / H frames. In addition, the same may be applied to all M / H subframes in one FC-M / H frame, or may be differently applied to each M / H subframe. The present invention may vary for each FC-M / H frame, and the same applies to all M / H subframes in one FC-M / H frame. In other words, the FC-M / H frame structure may be changed in units of FC-M / H frames, which makes it possible to adjust the ensemble data rate frequently and flexibly.

When data groups for at least one parade for the first mobile service are allocated to one FC-M / H frame, data for the second mobile service is allocated between the data group and the data group.

FIG. 8 illustrates three parades for the first mobile service in one M / H subframe among five M / H subframes constituting one FC-M / H frame (Parade # 0, Parade # 1, Parade #). When 2) is allocated, an example of allocating data for a second mobile service between data groups of the first to third parades is shown.

In this case, when the first parade # 1 includes three data groups per M / H subframe (NOG = 3), the positions of the groups in the M / H subframe are 0 to 2 in the i value of Equation 1 above. Can be obtained by substituting That is, the data groups of the first parade are sequentially arranged in the first, fifth, and ninth M / H slots (M / H Slot # 0, M / H Slot # 4, and M / H Slot # 8) in the M / H subframe. Is assigned to. If the second parade (# 2) also includes three data groups per M / H subframe (NOG = 3), the positions of the groups in the M / H subframe are 3 to 5 in the i value of Equation 1 above. Can be obtained by substitution. That is, the data groups of the second parade are sequentially arranged in the thirteenth, third, and seventh M / H slots (M / H Slot # 12, M / H Slot # 2, and M / H Slot # 6) in the M / H subframe. Is assigned to. In addition, if the third parade (# 3) includes four groups per M / H subframe (NOG = 4), the positions of the groups in the M / H subframe are 6 to 9 in the i value of Equation 1 above. Can be obtained by substitution. That is, the eleventh, fifteenth, second, and sixth M / H slots in the M / H subframe (M / H Slot # 10, M / H Slot # 14, M / H Slot # 1, and M / H Slot # 5). ) Are sequentially assigned the data groups of the third parade. As such, data groups for a plurality of parades may be allocated to one FC-M / H frame, and data group allocation in one M / H subframe has a group space of 4 M / H slots. Is being done serially.

Therefore, the number of groups of one parade per a sub-frame (NOG) that can be allocated to one M / H subframe may be any one of integers from 1 to 8. . Since one FC-M / H frame includes five M / H subframes, this means that the number of data groups in one parade that can be allocated to one FC-M / H frame is 5 to 40. It can be any one of multiples of.

In this case, since only the data of the A / B area in the data group is allocated to the corresponding M / H slot, the M / H slot to which the data group is allocated is allocated to 96 segments of the total 156 segments of the corresponding M / H slot. Data may be allocated. Then, the data for the second mobile service may be allocated to the remaining segments of the M / H slot, that is, 60 segments. 8, the first to third, fifth to seventh, ninth, eleventh, thirteenth, fifteenth M / H slots (M / H Slots # 0 to # 2, M / H Slots # 4 to # 6, data for the second mobile service may be allocated to 60 segments of M / H Slot # 8, M / H Slot # 10, M / H Slot # 12, and M / H Slot # 14).

In addition, data for the second mobile service is allocated to an M / H slot to which data for the first mobile service is not allocated. 8, the fourth, eighth, tenth, twelfth, fourteenth, sixteenth M / H slots (M / H Slot # 3, M / H Slot # 7, M / H Slot # 9, Data for the second mobile service may be allocated to 156 segments of M / H Slot # 11, M / H Slot # 13, and M / H Slot # 15).

In the present invention, the data assignment method for the first mobile service and the data assignment method for the second mobile service may be different for each FC-M / H frame, but within one FC-M / H frame. In one embodiment, all M / H subframes remain the same.

As described above, when one data group for the first mobile service exists, data for the second mobile service is allocated to 60 segments of the M / H slot when there is a data group for the first mobile service. Data for the second mobile service is allocated to the 156 segment of the / H slot.

The data for the second mobile service includes not only the second mobile service data but also a known data string (or training signal) for channel equalization. That is, the reception system estimates a channel impulse response (CIR) using the known data sequence at the time of channel equalization.

According to an embodiment of the present invention, the known data string for CIR estimation has a length of 2 segments.

According to an embodiment of the present invention, the known data string for CIR estimation is inserted every 16 or 12 segments in the M / H slot to which data for the second mobile service is allocated.

FIG. 9 illustrates that a known data string for CIR estimation of a second mobile service is allocated to an M / H slot of one M / H subframe among five M / H subframes constituting one FC-M / H frame. An example is shown.

According to the present invention, a method of allocating a known data string for CIR estimation of the second mobile service is applied differently depending on whether data for the first mobile service exists in an M / H slot to which data for the second mobile service is allocated. In one embodiment it will be.

For example, when the data for the first mobile service exists in the M / H slot to which data for the second mobile service is allocated, the known data string is inserted into the first two segments of the 60 segments of the M / H slot. In this case, the known data string is inserted into the next two segments. Subsequently, the process of inserting the known data string into the second segment following the 14th segment is repeated twice, and then the known data string is inserted into the second 2 segments after the 10 segments, that is, the last 2 segments of the 60 segments.

As another example, when the data for the first mobile service does not exist in the M / H slot to which data for the second mobile service is allocated, a known data string is provided in two segments after 14 of 156 segments of the M / H slot. After the insertion process is repeated nine times, a known data string is inserted into two segments after the tenth segment, that is, the last two segments of the 156 segments.

As such, the known data string for the second mobile service is inserted every 16 or 12 segments in the M / H slot to which the data for the second mobile service is allocated. And if 60 segments or 156 segments in one M / H slot are used for the second mobile service, the base data column is inserted in the last 2 segments of all 16 segments, and the base data column is inserted in the last 2 segments of the remaining 12 segments. Is inserted.

However, if 60 segments in one M / H slot are used for the second mobile service, that is, if there is data for the first mobile service, then immediately after the first two segments, data for the first mobile service (immediately following) In addition to the two segments, a known data column is inserted. At this time, the second mobile service data encoded with forward error correction (FEC) is allocated to the remaining segments except for the segments to which the known data string is allocated.

According to an embodiment of the present invention, the first 24 symbols of each known data string are used for memory initialization of the trellis encoder in the transmission system as shown in FIG.

At the end of each known data sequence, the state of all trellis encoders is zero by the pattern itself without any special state termination. That is, at the end of each known data string, the memories of all trellis encoders are zeroed by the pattern of the known data sequence without any apparent trellis state termination (all traninging signal), all memories. of trellis encoder (or TCM encoder) become zeros by its pattern without any explicit trellis state termination).

In addition, when only data for the second mobile service exists, the length and insertion period of the known data string may vary.

Meanwhile, in each M / H subframe in one FC-M / H frame, data for the first mobile service is allocated (or arranged), and a known data string for the second mobile service is allocated according to the allocation (or arrangement). After inserting, remaining data for the second mobile service is allocated to the remaining segments.

11 (a) and 11 (b) show an example of allocating data for a second mobile service in one M / H subframe.

For convenience of description, the present invention provides an area remaining after allocating the data for the first mobile service and the known data string for the second mobile service in each M / H subframe in one FC-M / H frame. 2 It will be called a data area for mobile services. That is, for example, in FIG. 11A, the white area becomes a data area for the second mobile service. In FIG. 11, the data area for the first mobile service shown in FIG. 10 exists, but is not shown for convenience of description.

The data for the second mobile service further includes not only second mobile service data and known data but also pre signaling data and post signaling data. The post signaling data is composed of TPC data and FIC data.

In this case, the pre-signaling data is allocated to the front of the data area for the second mobile service every M / H subframe, and then TPC data and FIC data are allocated in turn. The second mobile service data is allocated after the FIC data. If an area remaining in the data area for the second mobile service occurs even after allocating the second mobile service data, dummy data is allocated to the area. For example, if the pre-signaling data, the post-signaling data and the second mobile service data are allocated to the data area for the second mobile service and the area corresponding to the second segment remains, the dummy data is allocated to the two segments.

The second mobile service data corresponds to actual A / V data and the like, and may be configured as a type 1 parade and a type 2 parade as shown in FIG. In this case, the second mobile service data of the type 1 parade is allocated after the FIC data in the data area for the second mobile service, and the second mobile service data of the type 2 parade is allocated after the mobile service data of the first type parade. do.

The Type 1 Parade refers to having one slice in an M / H subframe, that is, one parade is transmitted at a time in the M / H subframe. For example, assuming three parades Prd0, Prd1, and Prd2 exist, in the data area for the second mobile service, after all the second mobile service data of Prd0 is allocated after the FIC data, Prd1 Allocates all of the second mobile service data. Finally, all of the second mobile service data of Prd2 are allocated.

The Type 2 parade refers to a parade having two or more slices in an M / H subframe. In this case, the length of each slice is the same in the type 2 parade, and the number and period of slices are the same between M / H subframes within one FC-M / H frame. That is, after dividing the second mobile service data of each parade into the corresponding slice size by the number of slices, the second mobile service data of each parade is distributed and allocated to each slice.

For example, assuming that two parades Prd3 and Prd4 exist and have three slices, as shown in FIG. 11B, the second mobile service data of Prd3 and the second mobile service data of Prd4 are exchanged. Each slice is divided into three slices and assigned sequentially to three slices of the parade. In this embodiment, the slice for Prd3 and the slice for Prd4 are alternately positioned and transmitted.

12 is a block diagram illustrating an embodiment of a transmission system for transmitting data for a first mobile service and data for a second mobile service described above.

12, a first mobile service processor 110, a second mobile service processor 120, a symbol multiplexer 131, a trellis encoder 132, a synchronization multiplexer 133, and a pilot inserter ( 134, modulator 135, and up converter 136. A pre-equalizer filter may be included as optional.

The first mobile service processor 110 may include a first RS frame encoder 111, a first block processor 112, a group formatting module 113, a first signaling encoder 114, and a first base. Data generator 115, position holder generator 116, and byte-symbol converter 117.

The second mobile service processor 120 may include a second RS frame encoder 121, a second block processor 122, a segment multiplexer 123, a second signaling encoder 124, and a second known data generator 125. , And bit-symbol converter 127.

In the transmission system configured as described above, the first mobile service data is input to the first RS frame encoder 111 of the first mobile service processing unit 110. In an embodiment, the first mobile service data is in the form of an IP datagram.

The first RS frame encoder 111 forms an RS frame payload for the first mobile service after data randomizing the input first mobile service data and performs encoding for error correction in units of RS frame payload. To form an RS frame. The first RS frame encoder 111 may be provided in parallel by the number of parades for the first mobile service in the FC-M / H frame.

The data of the error-correction-coded RS frame is allocated to corresponding regions of the plurality of data groups. That is, the data in the RS frame with error correction coding may be allocated to all of the A / B / C / D areas in the plurality of data groups, or may be allocated to any one of the A / B area and the C / D area.

According to an embodiment of the present invention, data of an RS frame for a first mobile service is allocated to an A / B area in a plurality of data groups. In this case, the RS frame mode value is 01.

In order to allocate the data of the RS frame to the A / B area of the plurality of data groups, the first RS frame encoder 111 separates the error correcting coded RS frame into a plurality of portions. Each portion of the RS frame corresponds to the amount of data that can be transmitted by the A / B area in one data group.

13 is a detailed block diagram illustrating an embodiment of a first RS frame encoder 111 according to the present invention.

The first RS frame encoder 111 may include a data randomizer 211, an RS-CRC encoder 212, and an RS frame divider 213.

That is, the data randomizer 211 of the first RS frame encoder 111 receives the first mobile service data and renders it to the RS-CRC encoder 212.

The RS-CRC encoder 212 collects the first randomized mobile service data to form an RS frame payload, and at least one of Reed-Solomon (RS) and Cyclic Redundancy Check (CRC) codes for the formed RS frame payload. One is used to form an RS frame by performing Forward Error Correction (FEC) encoding, and then outputs the RS frame to the RS frame divider 213. The FEC refers to a technique for correcting an error occurring in a transmission process.

That is, the RS-CRC encoder 212 is written from left to right and top to bottom so that the first mobile service data which is randomized and input has an RS frame payload size for the first mobile service. 1 form an RS frame payload for mobile services.

The RS frame payload unit performs at least one of an error correction encoding process and an error detection encoding process. This makes it possible to cope with an extremely poor and rapidly changing propagation environment by imparting robustness to the first mobile service data while obstructing clustering errors that may occur due to changes in the propagation environment.

In addition, the RS-CRC encoder 212 may collect a plurality of RS frame payloads to form a super frame, and perform row permutation in units of super frames. The row permutation is also referred to as row interleaving. That is, when the RS-CRC encoder 212 performs a process of mixing each row of the super frame with a predetermined rule, the positions of the rows before and after row mixing in the super frame are changed. When the row mixing is performed in the unit of the super frame, even if a large amount of error occurs in a single RS frame to be decoded, the errors are distributed in the entire super frame, so that these errors are distributed throughout the super frame. The decryption ability is improved. The row mixing process is optional.

According to an embodiment of the present invention, the RS-CRC encoder 212 uses RS encoding for error correction encoding and cyclic redundancy check (CRC) encoding for error detection encoding. Parity data to be used for error correction is generated when the RS encoding is performed, and CRC data to be used for error detection is generated when CRC encoding is performed. The CRC data generated by the CRC encoding may be used to indicate whether the first mobile service data is damaged by an error while being transmitted through the channel. The present invention may use other error detection encoding methods in addition to CRC encoding, or may increase the overall error correction capability at the receiving end by using an error correction encoding method.

According to an embodiment of the present invention, an RS frame payload for a first mobile service generated by the RS-CRC encoder 212 has a size of N (row) x 187 (column) bytes as shown in FIG. Yes. N is the length of a row (ie, the number of columns), and 187 is the length of a column (ie, the number of rows). In addition, the RS-CRC encoder 212 performs RS encoding on each column of an RS frame payload having a size of Nx187 bytes, as shown in FIG. 14B, and adds P1 parity data to each column. As shown in (c), CRC encoding is performed on each row, and a 2-byte CRC checksum is added to each row to form an RS frame.

Table 2 below shows an example of RS encoding information, that is, RS code mode.

RS Code mode (2 bits) Description 00 (211, 187) RS code, P1 = 24 01 (223, 187) RS code, P1 = 36 10 (235, 187) RS code, P1 = 48 11 Reserved

Table 2 shows an embodiment in which two bits are allocated to indicate an RS code mode. For example, if the RS code mode value is 01, (223, 187) -RS encoding is performed on the corresponding RS frame payload, indicating that 36 bytes of RS parity data is added to each column. That is, the RS code mode indicates the parity number P1 of the corresponding RS frame payload.

Here, the RS-CRC encoder 212 performs RS frame configuration, RS encoding, CRC encoding, super frame configuration, row mixing in units of super frames by referring to a predetermined transmission parameter and / or an externally provided transmission parameter. can do.

In the present invention, when the RS frame payload for the first mobile service before the error correction encoding has an Nx187 byte size as shown in FIG. 15, each row of N bytes is used for M / H service data for convenience of explanation. This is called a packet. The M / H service data packet may consist of an M / H header of 2 bytes and an M / H payload of N-2 bytes. In this case, the allocation of the M / H header area to two bytes is just one embodiment, and the present invention will not be limited to the above embodiment because it may be changed by a designer.

In this embodiment, the first mobile service data is in the form of an IP datagram. The RS frame payload may include table information and IP datagram for the first mobile service. For example, IP datagram and table information of two types of first mobile service data, namely news (for example, IP datagram for mobile service 1) and securities (for example, IP datagram for mobile service 2), may be It may be included in the RS frame payload.

That is, the M / H payload in the M / H service data packet constituting the RS frame payload may be assigned table information of a section structure or an IP datagram of the first mobile service data.

Alternatively, an IP datagram of table information may be allocated to an M / H payload in an M / H service data packet constituting the RS frame payload, or an IP datagram of first mobile service data may be allocated.

In this case, the M / H service data packet may not be N bytes including the M / H header.

In this case, stuffing bytes may be allocated to the remaining payload portion of the corresponding M / H service data packet. For example, after assigning program table information to one M / H service data packet, if the length of the M / H service data packet is N-20 bytes including the M / H header, stuffing the remaining 20 bytes You can allocate bytes.

FIG. 16 illustrates an example of fields allocated to an M / H header area in an M / H service data packet according to the present invention, and may include a type_indicator field, an error_indicator field, a stuff_indicator field, and a pointer field.

The type_indicator field may allocate 3 bits in one embodiment, and indicates a type of data allocated to a payload in a corresponding M / H service data packet. That is, it indicates whether the data of the M / H payload is an IP datagram or signaling information including table information. Each data type constitutes one logical channel. In the logical channel carrying IP datagram, multiple mobile services are multiplexed and transmitted, and each mobile service is demultiplexed in the IP layer.

The error_indicator field may allocate 1 bit in one embodiment, and indicates whether an error of the corresponding M / H service data packet occurs. For example, when the error_indicator field value is 0, it means that there is no error in the corresponding M / H service data packet, and when 1, there is an error.

The stuff_indicator field may allocate 1 bit as an embodiment and indicates whether a stuffing byte is present in the payload of the corresponding M / H service data packet. For example, if the value of the stuff_indicator field is 0, it means that there is no stuffing byte in the corresponding M / H service data packet, and 1 means that there is a stuffing byte.

In one embodiment, the pointer field may allocate 11 bits, and indicates location information at which new data (ie, new signaling information or new IP datagram) starts in a corresponding M / H service data packet.

For example, if an IP datagram for mobile service 1 and an IP datagram for mobile service 2 are allocated to the first M / H service data packet in the RS frame payload as shown in FIG. 15, the pointer is allocated. The field value indicates a start position of an IP datagram for mobile service 2 in a corresponding M / H service data packet.

In addition, if there is no new data in the corresponding M / H service data packet, the corresponding pointer field value is displayed as the maximum value according to an embodiment. According to an embodiment of the present invention, 11 bits are allocated to the pointer field. Therefore, if 2047 is displayed in the pointer field value, it means that the packet has no new data. If the pointer field is 0, the point indicated may vary according to the type_indicator field value and the stuff_indicator field value.

The order, location, and meaning of the fields allocated to the M / H headers in the M / H service data packet shown in FIG. 16 are merely an example for helping understanding of the present invention. The order, location, meaning of the fields to be allocated, and the number of additional fields to be allocated may be easily changed by those skilled in the art, and thus the present invention will not be limited to the above embodiments.

On the other hand, as shown in (c) of FIG. 14, data of the RS frame on which the RS encoding and the CRC encoding are performed is output to the RS frame divider 213.

The RS frame divider 213 partitions an RS frame having a size of (N + 2) x (187 + P1) into a plurality of portions having a size PL (where PL is the length of the RS frame portion). Output to one block processor 112.

In this case, the PL value may vary according to an RS frame mode, an SCCC block mode, and an SCCC outer code mode. According to the embodiment of the present invention, the RS frame data for the first mobile service is allocated to the A / B area in the data group and transmitted. Thus, the RS frame mode should be set to 01 and the SCCC block mode to 00. Therefore, the PL value is determined as shown in Table 3 below.

That is, Table 3 shows an example of the PL value of the RS frame that depends on the SCCC outer code mode value when the RS frame mode value is 01 and the SCCC block mode value is 00.

                      SCCC outer code mode                      PL for Region A for Region B 00 00 7644 00 01 6423 01 00 5043 01 01 3822 Other Reserved

For example, when the SCCC outer code mode values of the A / B area are each 00, 7644 bytes of first mobile service data in the primary RS frame may be allocated to the A / B area of the corresponding data group.

In addition, the total number of bytes of the RS frame in which RS and CRC encoding is performed is equal to or slightly smaller than 5 x NoG x PL. In this case, the RS frame is divided into ((5 x NoG)-1) portions of PL size and one portion of PL size or smaller size. That is, the size of each portion except the last portion among the portions divided from one RS frame is equal to PL.

If the size of the last potion is smaller than PL, stuffing bytes (or dummy bytes) are inserted into the last potion by the number of insufficient bytes so that the size of the last potion is finally PL.

(A) and (b) of FIG. 17 show the last stuffing of S stuffing bytes when a RS frame of size (N + 2) x (187 + P1) is divided into (5 x NoG) potions having a PL size. An example of adding to the above is shown.

That is, RS and CRC coded RS frames as shown in FIG. 17A are divided into a plurality of portions as shown in FIG. 17B. The number of portions divided from the RS frame is (5 x NoG). And the first ((5 x NoG)-1) potions contain a PL size, but the last one potion can be less than or equal to the PL size. If the size is smaller than the PL size, the last portion may be filled by obtaining S1 stuffing bytes as shown in Equation 2 below to make the PL size.

S1 = (5 x NoG x PL)-((N + 2) x (187 + P1))

Each portion including the PL size data is output to the first block processor 112.

The data of each portion output from the first RS frame encoder 111 includes at least one of pure first mobile service data, RS parity data, CRC data, and stuffing data, but broadly, data for the first mobile service. admit. Therefore, the data of each portion will all be regarded as the first mobile service data and will be described.

The first block processor 112 performs SCCC outer encoding on the output of the first RS encoder 111. That is, the first block processor 112 encodes the data of each portion inputted by error correction encoding at a code rate of 1 / H (where H is a natural number of 2 or more) and outputs the encoded data to the group formatter 113. The present invention encodes and outputs input data using either one of half code rate encoding (or half encoding) and one quarter code rate encoding (or quarter encoding). It is set as an Example.

The first block processor 112 may perform 1 / H encoding in units of SCCC blocks. The SCCC block includes at least one M / H block.

In this case, if 1 / H encoding is performed in one M / H block unit, the M / H block and the SCCC block are the same. For example, the B1 M / H block may be encoded at 1/2 code rate, the B2 M / H block at 1/4 code rate, and the B3 M / H block at 1/2 code rate. The same applies to the remaining M / H blocks.

When 1 / H encoding is performed in the first block processor 112 as described above, SCCC related information should be transmitted to the receiving system in order to correctly restore the first mobile service data.

Table 4 below shows an example of SCCC block information, that is, SCCC block mode.

 SCCC block mode (2 bits)              Description            00  SCCC block is identical with M / H block            01                 Reserved            10                 Reserved            11                 Reserved

In Table 4, 2 bits are allocated to indicate the SCCC block mode. For example, if the SCCC block mode value is 00, this indicates that the SCCC block and the M / H block are the same.

Table 5 below shows an example of code rate information of the SCCC block, that is, the SCCC outer code mode.

In Table 5, 2 bits are allocated to indicate code rate information of an SCCC block. For example, if the SCCC outer code mode value is 00, the code rate of the corresponding SCCC block indicates 1/2, and if 01, 1/4 indicates.

If the SCCC block mode value of Table 4 indicates 00, the SCCC outer code mode may display a code rate of each M / H block corresponding to each M / H block.

The group formatting unit 113 receives the data of the RS frame encoded by 1 / H from the first block processor 112 and inserts the data of the RS frame in the A / B area of the plurality of data groups.

The group formatting unit 113 receives signaling data (eg, FIC data and TPC data) encoded by the first signaling encoder 114 and inserts the received signaling data into a corresponding region of the data group.

The group formatting unit 113 receives the known data generated by the first known data generator 115 by a predetermined method and inserts the known data into the corresponding area of the data group.

In addition to the first mobile service data encoded by the first block processor 112, the group formatting unit 113 may include an MPEG header location holder, an unstructured RS parity location holder, a main service data location holder, and a dummy location in relation to data deinterleaving. A holder or the like is input from the first position holder generator 116 and inserted into a corresponding region of the data group.

The TPC data includes M / H-Ensemble ID, M / H-Subframe Number, Total Number of M / H-Groups (TNoG), RS frame Continuity Counter, Column Size of RS-frame (N), and FIC Version Number, It may include at least one of RS coding related information, SCCC coding related information, and FC-M / H frame related information. The TPC data is only an embodiment for better understanding of the present invention, and the present invention will not be limited to the above embodiment since addition and deletion of signaling information included in the TPC can be easily changed by those skilled in the art. The FIC data is provided to enable fast service acquisition at the receiver and includes cross layer information between the physical layer and the upper layer.

For example, when the data group includes six known data columns as shown in FIG. 4, the signaling information area is located between the first known data row and the second known data row. Therefore, the TPC data and the FIC data are inserted into the signaling information area. Also, the first known data string is inserted into the last two segments of the M / H block B3 in the data group, and the second known data column is inserted into the second and third segments of the M / H block B4. The third to sixth known data columns are inserted into the last two segments of the M / H blocks B4, B5, B6, and B7, respectively. The first, third to sixth known data columns are spaced 16 segments apart.

The output of the group formatting unit 113 is a byte unit, and is converted into a symbol unit in the byte-symbol converter 117 for 12-way TCM and then output to the symbol multiplexer 131.

Meanwhile, the second RS frame encoder 121 of the second mobile service processor 120 forms an RS frame payload for the second mobile service after data randomizing the input second mobile service data, and then executes an RS frame payload. Encoding for error correction is performed on a load basis. In an embodiment, the second mobile service data is in the form of an IP datagram. The second RS frame encoder 121 may be provided in parallel by the number of parades for the second mobile service in the FC-M / H frame.

18 is a detailed block diagram illustrating an embodiment of the second RS frame encoder 121 according to the present invention, and basically has the same structure as the first RS frame encoder 111.

The second RS frame encoder 121 may also include a data randomizer 311, an RS-CRC encoder 312, and an RS frame divider 313.

That is, the data randomizer 311 of the second RS frame encoder 121 receives the second mobile service data and renders it to the RS-CRC encoder 312.

The RS-CRC encoder 312 collects second mobile service data to form an RS frame payload for the second mobile service, and performs forward error correction (FEC) encoding on the formed RS frame payload to perform an RS frame. After forming the output to the RS frame divider 313. The FEC refers to a technique for correcting an error occurring in a transmission process.

That is, the RS-CRC encoder 312 is written from left to right and top to bottom so that the second mobile service data which is randomized and input has an RS frame payload size for the second mobile service. 2 form an RS frame payload for the mobile service.

The RS frame payload unit performs at least one of an error correction encoding process and an error detection encoding process. This makes it possible to cope with an extremely poor and rapidly changing propagation environment by imparting robustness to the first mobile service data while obstructing clustering errors that may occur due to changes in the propagation environment.

In addition, the RS-CRC encoder 312 may collect a plurality of RS frame payloads to form a super frame, and perform row permutation in units of super frames. When the row mixing is performed in the unit of the super frame, even if a large amount of error occurs in a single RS frame to be decoded, the errors are distributed in the entire super frame, so that these errors are distributed throughout the super frame. The decryption ability is improved. The row mixing process is optional.

According to an embodiment of the present invention, the RS-CRC encoder 312 uses RS coding for error correction coding and cyclic redundancy check (CRC) coding for error detection coding. Parity data to be used for error correction is generated when the RS encoding is performed, and CRC data to be used for error detection is generated when CRC encoding is performed. The CRC data generated by the CRC encoding may be used to indicate whether the second mobile service data is damaged by an error while being transmitted through the channel. The present invention may use other error detection encoding methods in addition to CRC encoding, or may increase the overall error correction capability at the receiving end by using an error correction encoding method.

According to an embodiment of the present invention, the RS frame payload for the second mobile service generated by the RS-CRC encoder 312 has a size of N (row) x M (column) bytes as shown in FIG. 19. N is the length of a row (i.e. the number of columns) and M is the length of the column (i.e. the number of rows). M may be 187 or may be a value other than 187.

In addition, the RS-CRC encoder 312 performs RS encoding on each column of an RS frame payload having a size of NxM bytes, adds P2 parity data to each column, and performs CRC encoding on each row to perform each row. Each time a two byte CRC checksum is added to form an RS frame for the second mobile service.

Also for the RS frame for the second mobile service, as shown in Table 2, RS encoding information for the second mobile service, that is, RS code mode may be set.

In this case, the RS-CRC encoder 312 is a RS frame configuration, RS encoding, CRC encoding, super frame configuration, super frame unit for the second mobile service with reference to a preset transmission parameter and / or externally provided transmission parameters Row mixing and the like.

In the RS frame payload for the second mobile service, each row of N bytes will be referred to as an M / H service data packet for convenience of description. The M / H service data packet may consist of an M / H header of 2 bytes and an M / H payload of N-2 bytes. In this case, the allocation of the M / H header area to 2 bytes is just one embodiment, and the present invention will not be limited to the above embodiment because it may be changed by a designer.

The M / H header area may include a type_indicator field, an error_indicator field, a stuff_indicator field, and a pointer field.

In an embodiment, the second mobile service data is in the form of an IP datagram. The RS frame payload may include table information and IP datagram for a second mobile service. That is, the M / H payload in the M / H service data packet constituting the RS frame payload may be assigned table information of a section structure or an IP datagram of second mobile service data. Alternatively, an IP datagram of table information or an IP datagram of second mobile service data may be allocated to an M / H payload in an M / H service data packet constituting the RS frame payload.

Description of each field assigned to the M / H header and data description assigned to the M / H payload may be omitted with reference to FIG. 15 described above.

Meanwhile, as shown in FIG. 19, data of an RS frame on which RS encoding and CRC encoding are performed is output to the RS frame divider 313.

The RS frame divider 313 divides an RS frame having a size of (N + 2) x (M + P2) bytes into a plurality of portions. That is, it is divided into a number of potions corresponding to the number of M / H subframes included in one FC-M / H frame. Therefore, according to the present invention, as shown in FIG. Data of each divided portion is transmitted through each M / H subframe. That is, since data of one RS frame is allocated to one FC-M / H frame, five portion data divided from the RS frame are allocated to five M / H subframes, respectively.

At this time, the size of the RS frame output from the second block processor 122 for the second mobile service is in accordance with the code rate, specific parade of the second RS frame encoder 121 and the second block processor 122. It may vary depending on the number of segments allocated. When RS frames are divided by the RS frame divider 313, stuffing data of S2 bits may be added as shown in FIG.

That is, in FIG. 20B, the NoS is the number of segments assigned to the corresponding parade in one M / H subframe (Number of segments assigned to the parade in a sub-frame). The output bit of the second block processor 122 is NoS (seg) x 828 (sym / seg) x 2 (bit / sym), and the output bit of the second RS frame encoder 121 is 5 x (NoS x 1656). x CodeRate). Also, (N + 2) x (M + P2) x 8 + S2 bit_stuff is equal to 8280 x NoS x CodeRate. The S2 bit_stuff can be obtained by floor (8280 x NoS x CodeRate / 8 / (M + P))-2.

Data of each portion divided by the RS frame divider 313 is input to the second block processor 122. According to an embodiment of the present invention, the second block processor 122 performs encoding using a parallel turbo code (ie, a parallel concatenated convolutional code (PCCC)).

FIG. 21 is a detailed block diagram illustrating an embodiment of the second block processor 122 according to the present invention, in which the second block processor 122 and the trellis encoder 132 are connected to each other. In reality, in the transmission system, a plurality of blocks exist between the second block processor 122 and the trellis encoder 132, but in the reception system, the two blocks are concatenated and decoded.

The second block processor 122 may include a bit-symbol converter 511, K interleavers 521 to 52K configured in parallel, and K + 1 convolutional encoders 530 to 53K configured in parallel. The bit-symbol converter 511 is optional.

That is, the second block processor 122 having the 1 / H code rate has a total of K + 1 branches, including branches or paths in which the original input data is passed to the convolutional encoder 530 as it is. K convolutional encoders 531 to 53K are connected to the output terminals of the K interleavers 521 to 52K, respectively. In this case, the interleavers 521 to 52K may be configured with symbol interleavers having different types. Each convolutional encoder encodes and outputs input data at any one of 1, 1/2, 1/3, 1/4, 1/5, and 1/6 code rates.

In the present invention, K is one embodiment less than or equal to 12. If K is 12, the output data of the 12th convolutional encoder may be arranged to be input to the 12th trellis encoder of the trellis encoder 132. If K is 3, output bytes of the convolutional encoder 530 are input to the first to fourth trellis encoders of the trellis encoder 132, and output bytes of the convolutional encoder 531 are trellis. The fifth to eighth trellis encoders of the trance encoder 132 are input, and the output bytes of the convolutional encoder 532 are the nineth to twelve trellis encoders of the trellis encoder 132. It can be controlled to be input. That is, each convolutional encoder is paired with a specific trellis encoder of the legacy VSB system.

The number of trellis encoders, convolutional encoders, and interleavers presented in the present invention is a preferred embodiment or a simple example, and thus the scope of the present invention is not limited to the above numerical values.

At this time, the trellis encoder 132 symbolizes the input data and divides the input data into respective trellis encoders according to a predefined method. Then, each trellis encoder precodes the upper bits of the input symbols and outputs them to the highest output bit C2, and outputs the lower bits to two output bits C1 and C0 by trellis encoding.

That is, the second mobile service data encoded at the 1 / H code rate by the second block processor 122 is output to the segment multiplexer 123. In addition, the signaling data encoded by the second signaling encoder 124 and the known data sequence generated by the second known data generator 125 are also output to the segment multiplexer 123. According to an embodiment of the present invention, the signaling data includes pre-signaling data and post-signaling data, and the post-signaling data includes FIC data and TPC data. TPC data for the second mobile service may also include M / H-Ensemble ID, M / H-Subframe Number, Total Number of M / H-Groups (TNoG), RS frame Continuity Counter, N (Column Size of RS-frame), It may include at least one of FIC Version Number, RS encoding information, PCCC encoding information, and FC-M / H frame information. The TPC data is only an embodiment for better understanding of the present invention, and the present invention will not be limited to the above embodiment since addition and deletion of signaling information included in the TPC can be easily changed by those skilled in the art. The FIC data is provided to enable fast service acquisition in a receiving system and includes cross layer information between a physical layer and a higher layer.

The segment multiplexer 123 allocates the second mobile service data, signaling data, and known data string to a corresponding segment of each M / H subframe in an FC-M / H frame according to a predetermined segment multiplexing rule.

In the case of FIG. 11, the pre-signaling data is allocated at the beginning of the data area for the second mobile service every M / H subframe, followed by TPC data and FIC data. Second mobile service data is allocated after the FIC data. If an area remaining in the data area for the second mobile service occurs even after allocating the second mobile service data, dummy (or stuffing) data is allocated to the area.

According to an embodiment of the present invention, the pre-signaling data is used for detecting a training mode, that is, detecting a length and insertion period of a known data string for CIR estimation. According to an embodiment of the present invention, the pre-signaling data has a length of 2 segments and a training mode value is repeatedly assigned.

For example, if the training mode consists of four bits, there is a known data sequence for the training mode of 0.5 segment length corresponding to 0 and 1 for each bit as shown in FIG. 22 (a). Represents a training mode with four bit words. At this time, the end of each known data string is patterned to be zero. By doing so, the memories of the trellis encoder are initialized to zero at the end of each known data string for the training mode.

According to an embodiment of the present invention, the meaning of the 4-bit word representing the training mode is predetermined by an appointment of the transmitting / receiving side. For example, as illustrated in FIG. 9, a training mode for transmitting a known data sequence for channel equalization of 2 segments in length every 16 segments or 12 segments may be designated as “1001”. As another example, a training mode for transmitting a known data string for channel equalization of one segment length every 12 segments may be designated as “0011”.

Assuming that the training mode value is "1001", the known data strings of the Seq # 2 Seq # 3 Seq # 5 Seq # 8 patterns are combined to form a known data string for a 2-segment training mode. , A pre-signaling data area in the M / H subframe. That is, the pre-signaling data allocated to the two segments of the pre-signaling data area is a form in which the Seq # 2 Seq # 3 Seq # 5 Seq # 8 Seq # 2 Seq # 3 Seq # 5 Seq # 8 patterns are repeated.

As another example, assuming that the training mode value is "0011", the known data strings of the Seq # 1 Seq # 3 Seq # 6 Seq # 8 pattern are combined to form a known data string for a 2-segment training mode. And a pre-signaling data area in the M / H subframe. That is, the pre-signaling data allocated to the two-segment pre-signaling data region is a form in which Seq # 1 Seq # 3 Seq # 6 Seq # 8 Seq # 1 Seq # 3 Seq # 6 Seq # 8 patterns are repeated.

At this time, at least two known data columns of the known data columns of the Seq # 1 to Seq # 8 patterns are different from each other. In addition, it is assumed that the pattern of each known data string is a pattern previously known by an appointment in the transmission / reception system.

Therefore, the reception system can determine the training mode by determining how the pre-signaling data received in the pre-signaling data area is a combined pattern. Knowing the training mode value, it is possible to know the length and insertion period of the known data string transmitted for CIR estimation.

Since the pre-signaling data is inserted after the known data sequence for CIR estimation at all times in the corresponding M / H subframe, no memory initialization of the trellis encoder is required. That is, after trellis coding, memory initialization of a separate trellis encoder for generating known data sequences is not necessary.

At the end of the pre-signaling data, all memories of the trellis encoder become zero according to the characteristics of the pattern itself. That is, by patterning the end of the pre-signaling data to zero, at the end of the pre-signaling data all the memory of the trellis encoder is zero according to the characteristics of the pattern itself without any apparent trellis state termination.

Since the pre-signaling data is a combination of patterns already known in the reception system, the pre-signaling data can be used for frame acquisition, and can also be used for carrier recovery by estimating a frequency offset.

FIG. 23 illustrates an example of allocating signaling data in a data region for a second mobile service in an M / H subframe.

The post signaling data is composed of TPC data and FIC data, and the TPC data is composed of common-TPC data and parade-TPC data.

The common-TPC data includes transmission parameters that are commonly applied to the parade of all second mobile services.

According to an embodiment of the present invention, the common-TPC data has a fixed length of 2 segments as shown in FIG. 23 and is allocated after the pre-signaling data. The last 24 symbols of the common-TPC data are used for initialization of the trellis encoder.

The Parade-TPC data and the FIC data may have a different length for each FC-M / H frame and may have a different code rate. Information on this is included in the common-TPC data and transmitted according to an embodiment. However, according to an embodiment, the length and the code rate are the same in each M / H subframe in one FC-M / H frame. The Parade-TPC data transmits information of an individual parade of the second mobile service. The Parade-TPC data is encoded by the PCCC scheme, and when a known data sequence or training signal for CIR estimation is inserted in the middle of the parade-TPC data, the PCCC block of the parade-TPC data is stored. Divided by the known data column.

For example, when the length of parade-TPC data is 8 segments or more and the first mobile service exists in the M / H subframe, the PCCC block of the parade-TPC data is divided based on the known data string. FIG. 23 shows an example in which the PCCC block of the parade-TPC data is divided into BL1 and BL2 based on a known data sequence.

When the memory of the trellis encoder is terminated at the end of the Common-TPC data and at the end of the known data string, and the memory of the PCCC encoder is zero at the start of the block of parade-TPC data, the start state of each block is always It becomes zero. FIC data is allocated after the parade-TPC data. The FIC data may be different between M / H subframes in one FC-M / H frame. That is, the FIC data may transmit different content for each M / H subframe.

24 is a detailed block diagram illustrating an embodiment of a second signaling encoder 124 for a second mobile service according to the present invention.

The second signaling encoder 124 of FIG. 24 includes two paths, a path for encoding TPC data and a path for encoding FIC data.

The path for encoding the TPC data may include a randomizer 611, an RS encoder 612, a block interleaver 613, a byte-bit converter 614, and a PCCC encoder 616. A known data inserter 615 may be further included between the byte-bit converter 614 and the PCCC encoder 616. The known data inserter 615 may be used to make the TPC data more robust to errors, the use of which is optional. That is, when the known data bits inserted by the promise of the transmitting / receiving system are inserted, the receiving system can know which bit is inserted in the position of the TPC data, thereby improving the receiving performance of the receiving system. .

That is, the TPC data is input to the randomizer 611 and rendered, and then input to the RS encoder 612 to be RS encoded. Common-TPC data among the RS-coded TPC data is output to the byte-bit converter 614, parade-TPC data is block-interleaved in the block interleaver 613, and then output to the byte-bit converter 614 to be bit unit Is converted to. The bit-by-bit TPC data output from the byte-bit converter 614 is input to the PCCC encoder 616, encoded by the PCCC scheme, and then output to the segment multiplexer 123. In this case, both the Common-TPC data and the Parade-TPC data may be input to the known data inserter 615 to insert the known data bits in the middle, which are different code rates with the same PCCC encoder 616. to implement the code rate. For example, if one known data bit is inserted for every four bits and 1/4 PCCC encoding is performed by the PCCC encoder 6216, encoding of 1/5 code rate is achieved.

The path for FIC data encoding may include a randomizer 621, an RS encoder 622, a byte-bit converter 623, and a PCCC encoder 624.

That is, the FIC data is input to the randomizer 621 and rendered, and then input to the RS encoder 622 to be RS encoded. The RS-encoded FIC data is output to the byte-bit converter 623 and converted into bits. The RS-coded FIC data is input to the PCCC encoder 624 and encoded by the PCCC scheme, and then output to the segment multiplexer 123. The segment multiplexer 123 collects the data of the RS frame encoded by the second block processor 122, the signaling data encoded by the second signaling encoder 124, and the known data generated by the known data generator 125. It receives the input in the unit of segment and multiplexes it according to the predetermined segment multiplexing rule. For example, the segment multiplexer 123 outputs a two-segment known sequence of data, then outputs two-segment pre-signaling data, followed by the pre-signaling data, common-TPC data, parade-TPC. Data and FIC data are sequentially output, followed by RS frame data. The data multiplexed and output by the segment multiplexer 123 is converted into a symbol unit in the bit-symbol converter 127 and output to the symbol multiplexer 131.

The symbol multiplexer 131 receives the symbol unit data for the first mobile service from the byte-symbol converter 117 and the symbol unit data for the second mobile service from the bit-symbol converter 127. Receives and outputs the signal by multiplexing according to the predetermined symbol multiplexing rule. For example, if data for the first mobile service and data for the second mobile service are transmitted together in the first M / H slot in the M / H subframe, firstly, the first mobile is performed during the 96 segments of the first M / H slot. Output data symbols for the service and then output data symbols for the second mobile service for 60 segments.

The output of the symbol multiplexer 131 is input to the trellis encoder 132. The trellis encoder 132 performs 12-way interleaving and trellis encoding on data input in symbol units and outputs the trellis to the synchronous multiplexer 133. The trellis encoder 132 operates in the same manner as the existing VSB system and may perform memory initialization according to input data.

The synchronization multiplexer 133 inserts field synchronization and segment synchronization into the output of the trellis encoder 132 and outputs them to the pilot inserter 134.

The pilot-inserted data in the pilot inserter 134 is modulated by a modulator 135, for example, VSB, and then transmitted to each receiving system through the RF up-converter 136.

Within the receiving system Demodulator

25 is a block diagram illustrating an embodiment of a demodulator in a reception system according to the present invention. In the demodulator of FIG. 25, reception performance can be improved by receiving known data, signaling data, and the like transmitted from a transmission system and using them in carrier recovery, timing recovery, frame synchronization recovery, channel equalization, and the like.

The demodulator according to the present invention for this purpose is a demodulator 711, equalizer 712, block decoder 713, RS frame decoder 714, pre-signal decoder 721, training signal detector 722, and post-signal decoder 723 may include.

That is, the broadcast signal of a specific channel tuned through the tuner is down-converted to an intermediate frequency (IF) signal, and the down-converted signal is output to the demodulator 711 and the pre-signal decoder 721. At this time, the down-converted signal is input to the demodulator 711 and the pre-signal decoder 721 through an analog / digital converter (ADC, not shown) for converting the passband analog IF signal into a digital IF signal. In one embodiment it will be.

The broadcast signal received by the tuner may include only data for the second mobile service or may include both data for the first and second mobile services. That is, only data for the second mobile service may be received on a FC-M / H frame basis, or both data for the first and second mobile services may be received.

The data for the first mobile service includes first mobile service data, known data for the first mobile service, TPC data, and FIC data.

The data for the second mobile service includes second mobile service data, a known data string (or training signal) for CIR estimation of the second mobile service, pre-signaling data, and post-signaling data. The post signaling data includes TPC data and FIC data.

The demodulator 711 performs automatic gain control, carrier recovery, and timing recovery on the digital IF signal of the input passband to make the baseband signal, and then the equalizer 712, the pre-signal decoder 721, and the training. Output to the signal detector 722. When the demodulator 711 performs automatic gain control, carrier recovery, timing recovery, and the like, the pre-signaling data decoded by the pre-signaling decoder 721 and the training signal detected by the training signal detector 722, for example, By using known data, demodulation performance can be improved.

The equalizer 712 compensates for the distortion on the channel included in the demodulated signal and outputs the same to the block decoder 713 and the post signaling decoder 723. When the equalizer 712 compensates for the distortion on the channel included in the demodulated signal, by using the pre-signaled data decoded by the pre-signal decoder 721 and the known data detected by the training signal detector 722, Channel equalization performance can be improved. As an example, the equalizer 712 performs channel equalization by estimating a channel impulse response (CIR). According to the present invention, channel equalization can be more stably performed by estimating the CIR using known data and / or field synchronization, which know the location and content of the transmitter / receiver.

When the input data is data for the first mobile service, the equalizer 712 may use one of the CIRs estimated in the known data section as it is, according to the characteristics of each region of the data group, and at least a plurality of CIRs. The CIR generated by interpolation or extrapolation may be used.

When the input data is data for the second mobile service, the equalizer 712 may use one of the CIRs estimated in the known data interval as it is, interpolate or extrapolate at least a plurality of CIRs. CIR generated by extrapolation) is used.

Here, interpolation is a function value at some point between Q and S when the function value F (Q) at point Q and the function value F (S) at point S are known for a function F (x). It is meant to estimate, and the simplest example of the interpolation is linear interpolation. The linear interpolation technique is the simplest of many interpolation techniques, and various other interpolation techniques may be used in addition to the above-described methods, and thus the present invention will not be limited to the examples described above.

Also, extrapolation can be used to determine the function value F (Q) at time Q and the function value F (S) at time S for a function F (x). It means to estimate the function value at the time point. The simplest example of such extrapolation is linear extrapolation. The linear extrapolation technique is the simplest of many extrapolation techniques, and various other extrapolation techniques may be used in addition to the above-described methods, and thus the present invention will not be limited to the examples described above.

The pre-signal decoder 721 receives at least one of the pre / post signals of the demodulator 711 and is allocated to the front of the data area for the second mobile service in each M / H subframe in the FC-M / H frame. Decode the received pre signaling data. For example, the pre-signaling decoder 721 estimates a training mode by determining a combination of known patterns of the pre-signaling data. The length and insertion period of the known data for the second mobile service are decoded according to the estimated training mode. The known pattern constituting the pre-signaling data can be used to correct frame acquisition and frequency offset.

The decoded pre-signaling data is output to the demodulator 711, the equalizer 712, the training signal detector 722, and the post-signal decoder 723.

The training signal detector 722 detects known data information known by the promise of the transmitting / receiving side from any one of pre / demodulation signals and outputs it to the demodulator 711 and the equalizer 712. If the known data is known data for a second mobile service, the training signal detector 722 refers to the known signaling signal decoded by the pre-signal decoder 721, that is, the length and insertion period of the known data string. Data information can be detected.

The demodulator 711 uses the output of the training signal detector 722 if the user has selected the first mobile service and pre-signaled data decoded by the pre-signal decoder 721 if the second mobile service has been selected. Timing recovery, carrier recovery, etc., are performed on the digital IF signal of the passband inputted by using the PDP.

The post-signaling decoder 723 uses post-signaling data using a signal whose channel distortion is compensated by the equalizer 712 and a training mode (ie, length and insertion period of a known data stream) received from the pre-signaling decoder 721. The common / TPC data, parade-TPC data, FIC data, and the like are decoded and outputted to the demodulator 711, the block decoder 713, and the RS frame decoder 714. The demodulator 711 may determine a frame structure using TPC data among the decoded post signaling data.

In an embodiment, the post signaling decoder 723 decodes the post signaling data by the PCCC scheme. For example, if the user selects the first mobile service, the reverse process of the first signaling encoder of FIG. 12 is performed to decode TPC data, FIC data, and the like. If the second mobile service is selected, PCCC decoding is performed in the reverse process of FIG. 24 to decode common / TPC data, parade-TPC data, FIC data, and the like, which are allocated and received after the pre-signaling data.

The decoded common-TPC data includes transmission parameters that are common to all parades of the second mobile service. The Parade-TPC data and the FIC data may have a different length for each FC-M / H frame and may have a different code rate. Information about this can be obtained by parsing common-TPC data. The decoded Parade-TPC data includes information of the individual parade of the second mobile service.

The block decoder 713 may use the decoded TPC data to distinguish whether the data input from the equalizer 712 is data for a first mobile service or data for a second mobile service.

If the user selects the first mobile service, the block decoder 713 receives data for the first mobile service from the data output from the equalizer 712 based on the turbo decoding related information among the decoded TPC data. SCCC turbo decoding is performed by the reverse process of the transmission system. In this case, the data output from the block decoder 713 is added to the RS frame data of the parade of the first mobile service to be received (that is, the first mobile service data inserted into the corresponding RS frame payload and the RS frame payload. RS parity and CRC data). That is, the block decoder 713 performs trellis decoding and SCCC-based block decoding on the data for the first mobile service in reverse. In this case, the first block processor 112 of the transmitting side may be viewed as an external encoder, and the trellis encoder 132 may be viewed as an internal encoder. In order to maximize the decoding performance of the outer code at the time of decoding the concatenated code, it is preferable to output the soft decision value from the decoder of the inner code.

On the contrary, if the user selects the second mobile service, the block decoder 713 uses the data for the second mobile service from the data output from the equalizer 712 based on the turbo decoding related information among the decoded TPC data. Is extracted and performs turbo decoding of the PCCC method in the reverse process of the transmission system. In this case, the data output from the block decoder 713 is added to the RS frame data of the parade of the second mobile service to be received (that is, the second mobile service data inserted into the corresponding RS frame payload and the RS frame payload. RS parity and CRC data). That is, the block decoder 713 performs trellis decoding and PCCC block decoding on the reverse side of the transmitting side. In this case, the second block processor 122 on the transmitting side may be viewed as an external encoder, and the trellis encoder 132 may be viewed as an internal encoder. In order to maximize the decoding performance of the outer code at the time of decoding the concatenated code, it is preferable to output the soft decision value from the decoder of the inner code.

The turbo decoded data by the block decoder 713 is input to the RS frame decoder 714.

If the RS frame decoder 714 is turbo decoded and outputted data is data for the first mobile service, the RS frame decoder 714 refers to the RS frame related information included in the TPC data of the first mobile service. The reverse process is performed to correct an error generated in the first mobile service data received in the RS frame payload.

In addition, if the data decoded and turbo-decoded is data for the second mobile service, the RS frame decoder 714 refers to the RS frame related information included in the TPC data of the second mobile service. By performing the reverse process of, correcting an error generated in the second mobile service data received in the RS frame payload. For example, if data that is turbo decoded and output is data for a second mobile service, the RS frame decoder 714 is based on RS frame related information among the TPC data decoded by the post signaling decoder 723. After the data for the second mobile service turbo-decoded and output by the block decoder 713 are collected for one FC-M / H frame, CRC check and erasure RS decoding are performed. By doing so, the RS frame decoder 714 finally outputs the second mobile service data which is error corrected.

According to an embodiment of the present invention, the error-corrected second mobile service data is in the form of an IP datagram.

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

1 illustrates an example of an FC-M / H frame structure for transmitting and receiving mobile service data according to the present invention.

2 illustrates an example of a general VSB frame structure.

FIG. 3 is a diagram of the present invention showing an example of mapping of the first 4 M / H slot positions of an M / H subframe to a VSB frame in a spatial domain; FIG.

4 illustrates an embodiment of a structure of a data group after data interleaving according to the present invention.

5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a diagram illustrating an example of a data group order allocated to one M / H subframe among five M / H subframes constituting an FC-M / H frame according to the present invention.

7 illustrates an example of allocating data for a first mobile service of a single parade to one FC-M / H frame according to the present invention.

8 shows an example of allocating data for the first mobile service of three parades to one M / H subframe according to the present invention.

9 is a diagram illustrating an example of allocating known data for a second mobile service after allocating data for the first mobile service of three parades to one M / H subframe according to the present invention.

10 illustrates an example of a known data string for a second mobile service having a two segment length according to the present invention.

11 (a) and 11 (b) illustrate a second region in a remaining area after allocating data for a first mobile service and a known data string for a second mobile service in one M / H subframe according to the present invention. Figure showing an example of allocating data for mobile services

12 is a block diagram illustrating an example of a transmission system according to the present invention.

13 is a detailed block diagram illustrating an example of a first RS frame encoder according to the present invention.

14A to 14C illustrate an example of a process of performing error correction encoding and error detection encoding on an RS frame payload according to the present invention.

15 illustrates an example of an RS frame payload structure according to the present invention.

16 illustrates an example of an M / H header structure in an M / H service data packet according to the present invention.

17A and 17B illustrate an embodiment of a process of dividing an RS frame for a first mobile service according to the present invention.

18 is a detailed block diagram illustrating an example of a second RS frame encoder according to the present invention.

19 illustrates an example of an RS frame for a second mobile service in which error correction encoding and error detection encoding are performed according to the present invention.

20A and 20B illustrate an embodiment of a process of dividing an RS frame for a second mobile service according to the present invention.

21 is a block diagram illustrating an embodiment of a second block processor according to the present invention.

22A and 22B illustrate an example of a pre-signaling data structure used to detect a training mode according to the present invention.

FIG. 23 is a diagram illustrating an embodiment of allocating known data, pre-signaling data, and post-signaling data to a M / H subframe for a second mobile service according to the present invention. FIG.

24 is a block diagram illustrating an embodiment of a second signaling code according to the present invention.

25 is a block diagram illustrating an embodiment of a demodulator in a reception system according to the present invention.

Claims (16)

One transmission frame is composed of a plurality of subframes, one subframe is composed of a plurality of slots, and demodulated mobile service data which is allocated to some segments of at least one slot based on the decoded pre-signaling data. A demodulator; A pre-signal decoder which decodes the pre-signaling data allocated to the first slot of the subframe and outputs the decoded pre-signaling data to the demodulator; A post-signaling decoder for decoding post-signaling data allocated and received after the pre-signaling data; And And a block decoder for turbo decoding the demodulated mobile service data based on the decoded post signaling data. The method of claim 1, And a predetermined known data string is allocated to the last segment of the slot to which the mobile service data is allocated by an appointment of a transmitting / receiving side. The method of claim 1, The mobile service data is data for a second mobile service, and when data for the first mobile service is allocated to some segment of a slot to which the mobile service data is allocated, the mobile service data is transmitted to a segment next to the data for the first mobile service. / Receive system, characterized in that the predetermined known data stream is assigned and received by the receiving party. The method of claim 3, wherein And the data for the first mobile service is allocated to 96 segments of the corresponding slot and received. 4. The block decoder of claim 3, wherein the block decoder Receiving a trellis for the mobile service data for the first mobile service, and then turbo decoding using a SCCC (Serial Concatenated Convolutional Code) scheme. 4. The block decoder of claim 3, wherein the block decoder And after the trellis decoding is performed on the mobile service data for the second mobile service, turbo decoding is performed using a Parallel Concatenated Convolutional Code (PCCC) scheme. The method of claim 1, An RS frame is formed by gathering the mobile service data, and the RS frame is divided by the number of subframes in one transmission frame, and is allocated to some segments of at least one slot of each subframe. system. The method of claim 1, The post signaling data is TPC data including fast information channel (FIC) data for fast acquisition of the mobile service data, FIC version information for identifying an update of the FIC data and encoding information of the mobile service data. And FIC data is received after the TPC data. The method of claim 1, And a training signal detector for detecting a known data string received through a slot to which the mobile service data is allocated using the length and insertion period of the known data string extracted from the pre-signaling data. One transmission frame consists of a plurality of subframes, one subframe consists of a plurality of slots, and is allocated to at least some segment of at least one slot based on the decoded pre-signaling data. Demodulating; Decoding pre-signaling data allocated and received in the first slot of the subframe; Decoding post-signaling data allocated and received after the pre-signaling data; And Turbo decoding the demodulated mobile service data based on the decoded post signaling data. The method of claim 10, And a predetermined known data string is allocated to the last segment of the slot to which the mobile service data is allocated and received by an appointment of a transmitting / receiving side. The method of claim 10, The mobile service data is data for a second mobile service, and when data for the first mobile service is allocated to some segment of a slot to which the mobile service data is allocated, the mobile service data is transmitted to a segment next to the data for the first mobile service. And a predetermined known data string is received and received according to an appointment of the receiving side. 13. The method of claim 12, And the data for the first mobile service is allocated to 96 segments of the corresponding slot and received. The method of claim 12, wherein the mobile service data decoding step is And after performing trellis decoding on the mobile service data for the second mobile service, turbo decoding the data using a Parallel Concatenated Convolutional Code (PCCC) scheme. The method of claim 10, An RS frame is formed by gathering the mobile service data, and the RS frame is divided by the number of subframes in one transmission frame, and is allocated to some segments of at least one slot of each subframe. How the system processes data. The method of claim 10, The post signaling data includes fast information channel (FIC) data for fast acquisition of the mobile service data, and TPC data including FIC version information for identifying an update of the FIC data and encoding information of the mobile service data. And FIC data is received after the TPC data.

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