JP5916837B2 - Method and apparatus for transmitting / receiving control information in broadcast / communication system - Google Patents

Description

  The present invention generally relates to a method and apparatus for transmitting / receiving control information in a broadcast / communication system, and in particular, transmits / receives control information in a broadcast / communication system using a low density parity detection (LDPC) code. The present invention relates to a method and an apparatus.

FIG. 1 shows a frame structure used in a conventional broadcast / communication system.
Referring to FIG. 1, a frame 101 including control information is transmitted / received in a broadcast / communication system. The frame 101 includes a preamble 102, L1 (Layer1) signaling 103, and data 104. Here, the control information can be transmitted by the preamble 102 and the L1 signaling 103. The pre-angle 102 is a signal used to acquire receiver time and frequency synchronization, frame boundary synchronization, and the like.

As shown in FIG. 1, the data 104 includes physical hierarchy pipes (PLP) 108, 109, and 110. Different modulation schemes and code rates may be used independently for each PLP.
The L1 signaling 103 indicates a part where the L1 signal is transmitted, and includes L1 pre information 105, L1 configurable information 106, and L1 dynamic information 107. The L1 variable information 106 and the L1 dynamic information 107 are referred to as L1 post-signaling information 120. The L1 variable information 106 is referred to as variable L1 post signaling, and the L1 dynamic information 107 is referred to as dynamic L1 post signaling.
The L1 pre-information 105 includes information that hardly changes in time, such as a cell identifier, a network identifier, the number of radio frequencies (RF), a frame length, and a pilot subcarrier position. The L1 variable information 106 includes information that is changed more frequently than the L1 pre-information 105. Examples of the L1 variable information 106 include a PLP identifier, a modulation scheme used for each PLP transmission, and coding rate information.

In FIG. 1, the L1 dynamic information 107 is information that can be changed in each frame, for example, information about a position where each PLP that transmits service data is transmitted in the current frame (that is, each service data is transmitted in the current frame). Information on the position where the PLP starts and ends).
Further, the L1 post signaling information 120 can include information other than the L1 post variable information 106 and the dynamic information 107. For example, the L1 post-signaling information 120 includes extension information, CRC (Cyclic Redundancy Check) that is an error check code, and L1 padding. As an example, the use of CRC is disclosed in Non-Patent Document 1.
PLP1 108, PLP2 109, and PLP N110 are service data for transmitting at least one broadcast service channel. PLP1 108, PLP2 109, and PLP N110 include actual broadcast data.

Referring to FIG. 1, a receiver that has acquired synchronization of the frame 101 through the preamble 102 acquires information including a scheme in which data is transmitted through the L1 signaling information 103, a frame length, and the like. The receiver receives relevant data through the PLPs 108-110 based on the acquired information.
As described above, when control information such as signaling information is transmitted in a broadcasting / communication system, the encoding performance of control information should be superior to the encoding performance of data information. Therefore, there is a need for an efficient encoding method and efficient decoding method for signaling information.

Peterson, W.W. and Brown, D.T., "Cyclic Codes for Error Detection", Proceedings of the IRE 49: 228, doi: 10.1109 / JRPROC.1961.287814, January 1961

Accordingly, the present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide an encoding method that improves the decoding performance of control information.
Another object of the present invention is to provide an encoding method for improving decoding performance of L1 post-signaling information.
Another object of the present invention is to provide a method and apparatus for transmitting / receiving control information in a broadcast / communication system.

  To achieve the above object, according to an aspect of the present invention, a method for transmitting signaling information by a transmitter in a broadcast / communication system is provided. The method includes generating a plurality of signaling information, and determining the number of coding blocks in which the signaling information is encoded based on the number of bits of the signaling information and the number of bits of the encoded input information. Segmenting each signaling information based on the number of coding blocks; configuring input information bits for each coding block to include a segmented portion of each piece of signaling information; , Encoding input information bits of each encoded block, and transmitting each encoded block.

  According to another aspect of the invention, a method for receiving signaling information by a receiver in a broadcast / communication system is provided. The method includes receiving a coded block of signaling information, obtaining a number of bits of signaling information or the number of coded blocks, decoding a coded block, and a decoded coded block And extracting the segmented signaling information bits included in the information, and restoring the extracted segmented signaling information bits to a state before the segmentation.

  According to another aspect of the present invention, an apparatus for transmitting signaling information in a broadcast / communication system is provided. The apparatus includes a layer 1 (L1) signaling information generator that generates a plurality of signaling information, and a code that encodes the signaling information based on the number of bits of signaling information and the number of bits of encoder input information. A controller for determining the number of coding blocks, segmenting each piece of signaling information according to the number of coding blocks, configuring input information bits of each coding block to include a segmented portion of each signaling information, and inputting It includes an encoder that encodes information bits into each encoded block and a transmitter that transmits each encoded block.

  Furthermore, according to another aspect of the present invention, an apparatus for receiving signaling information in a broadcast / communication system is provided. The apparatus receives a coded block of signaling information, a decoder that decodes the coded block, obtains the number of bits of the signaling information or the number of coded blocks, and converts the coded block into a decoded coded block. It includes a controller that extracts the included segmented signaling information bits and a reassembler that reassembles the segmented signaling information bits into a state prior to segmentation.

The present invention can improve the decoding performance of the receiver by encoding the transmitter so that the control information is changed efficiently.
The above and other aspects, features and advantages of embodiments according to the present invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings.

It is a figure which shows the flame | frame used by the conventional broadcast / communication system. It is a figure which shows the conventional segmented control information in a broadcast / communication system. FIG. 6 illustrates a method for segmenting control information to generate encoder input information bits according to an embodiment of the present invention. FIG. 4 illustrates a method for generating encoder input information bits without segmenting control information according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a method of configuring input information bits input to an encoder according to an embodiment of the present invention. It is a figure which shows the information bit input into the encoder by one Embodiment of this invention. It is a figure which shows the information bit input into the encoder by one Embodiment of this invention. It is a figure which shows the information bit input into the encoder by one Embodiment of this invention. It is a figure which shows the information bit input into the encoder by one Embodiment of this invention. 5 is a flowchart illustrating a method for encoding and transmitting control information by a transmission apparatus according to an embodiment of the present invention. 3 is a flowchart illustrating a method for receiving control information by a receiving apparatus according to an embodiment of the present invention. It is a block block diagram which shows the transmitter by one Embodiment of this invention. It is a block block diagram which shows the receiver by one Embodiment of this invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the following description, when it is determined that a specific description related to a known function or configuration related to the present invention makes the gist of the present invention unclear, a detailed description thereof will be omitted.
Although embodiments of the present invention are described below using LDPC coding, the present invention is applicable to other types of coding.

FIG. 2 shows conventional segmented control information in a broadcast / communication system. In particular, FIG. 2 illustrates encoding of L1 variable information 208 and L1 dynamic information 209 corresponding to L1 post signaling information included in L1 signaling information.
Referring to FIG. 2, since the L1 variable information 208 does not change from frame to frame and includes information that changes from time to time, the L1 variable information of the Kth frame may be the same as the L1 variable information of the K + 1th frame. When the L1 variable information included in the Kth frame is the same as the L1 variable information included in the K + 1th frame, if the receiver has received the K + 1th frame, the receiver includes the already received Kth frame. The L1 variable information included in the (K + 1) th frame can be recognized in advance through the included L1 variable information. Therefore, the receiver can improve the performance of the L1 dynamic information included in the (K + 1) th frame using the L1 variable information recognized in advance.

More specifically, since the receiver receives the L1 variable information included in the Kth frame and the same L1 variable information is transmitted in the K + 1th frame, the receiver decodes the K + 1th frame. In this case, the L1 variable information included in the (K + 1) th frame is already known.
Furthermore, even when the decoding of the Kth frame fails, the receiver uses the L1 variable information received in the Kth frame to improve the decoding performance of the L1 variable information and the L1 dynamic information of the K + 1th frame. Can be improved. For example, when the L1 variable information of the Kth frame is the same as the L1 variable information of the K + 1th frame, the receiver acquires even if the decoding of the L1 variable information included in the Kth frame fails. The LLR (Log Likelihood Ratio) value obtained can be used for decoding the (K + 1) th frame.

  When the LDPC code is used, the encoder encodes only a number of information bits smaller than a predetermined number of input information bits (encoding unit; the number of input information bits corresponding to the input size of the encoder). Therefore, in the LDPC encoding method, when the number of settlement information bits is larger than a predetermined number of input information bits, the input information bits are segmented. Here, information input to the encoder is referred to as “input information bits”, and a codeword output after being encoded by the encoder is referred to as “encoded block”.

Referring to FIG. 2, corresponding to L1 post-signaling information having a size of “a”, L1 variable information 208 and L1 dynamic information 209 having a variable length are segmented into two encoded blocks. If the number of bits of L1 post-signaling information is greater than the number of predetermined encoder input information bits, the L1 post-signaling information is segmented into two coding blocks. In this case, the first input information bit 210 is generated by extracting the a / 2 part from the L1 post-signaling information, and the second input information bit 212 extracts the remaining a / 2 from the L1 post-signaling information. Generated. The first input information bit 210 includes L1 variable information ₁ (L1 configurable ₁ ) 210 that is a part of the L1 variable information 208. That is, the first input information bit 210 includes only the L1 variable information 208. The second input information bit 212 includes L1 variable information ₂ (L1 configurable ₂ ) 211 and L1 dynamic information (L1 dynamic) 209, which are part of the L1 variable information 208.

It is assumed that the L1 variable information 208 included in the Kth frame is the same as the L1 variable information 208 included in the K + 1th frame. Therefore, if the receiver receives the Kth frame and successfully decodes the L1 variable information 208, the receiver uses the first encoded block including the first input information bits 210 in the K + 1th frame. There is an advantage that it does not have to be decrypted. However, the second encoded block including the second input information bit 212 includes only the L1 variable information ₂ (L1 configurable ₂ ) 211 that is a part of the L1 variable information 208. Therefore, even if the receiver knows the L1 variable information 208, since the number of bits of information known by the receiver is not large, the decoding performance of the L1 dynamic information 209 cannot be greatly improved.

According to an embodiment of the present invention, as shown in FIG. 2, the L1 variable information 208 is included in each of the first and second input information bits.
Also, in the LDPC encoding method, the decoding performance of information located in the front part of the encoder input information bits is superior to the decoding performance of information located in the rear part. Therefore, according to an embodiment of the present invention, when LDPC is used, it is desirable to improve the decoding performance of the receiver by positioning L1 dynamic information that can change from frame to frame in front of the input information bits. .

  FIG. 3 illustrates a method for segmenting control information and generating encoder input information bits according to an embodiment of the present invention. In particular, in FIG. 3, the segmentation value is the same as 2. This value is divided into the first input information bit and the second input information bit according to the encoding unit in which the L1 signaling information (particularly L1 post-signaling information) to be encoded corresponds to the input size of the encoder. Means to be entered. Therefore, when the segmentation value is 2, the input information bits encoded by the encoder are divided into two encoded blocks and output from the encoder.

Referring to FIG. 3, the L1 variable information 301 is segmented into two parts, that is, L1 variable information ₁ 303 and L1 variable information ₂ 304 according to the segmentation value 2. Further, the L1 dynamic information 302 is separated into two parts, that is, L1 dynamic information ₁ 305 and L1 dynamic information ₂ 306 by the segmentation value 2.
Further, the transmitter configures the first encoder input information bit 310 with the segmented L1 variable information ₁ 303 and the L1 dynamic information ₁ 305, and the L1 variable information ₂ 304 and the L1 dynamic information ₂ 306 with the second The encoder input information bit 320 is configured. The transmitter inputs the first and second encoder input information bits 310 and 320 to the LDPC encoder to generate two encoded blocks. In the first input information bit 310, the L1 dynamic information ₁ 305 is arranged in front of the L1 variable information ₁ 303. Similarly, in the second input information bit 320, the L1 dynamic information ₂ 306 is arranged in front of the L1 variable information ₂ 304.

Alternatively, the L1 dynamic information and the L1 variable information can exchange positions with each other. For example, L1 variable information ₁ 303 can be placed in front of L1 dynamic information ₁ 305, and L1 variable information ₂ 304 can be placed in front of L1 dynamic information ₂ 306.
Furthermore, even when the encoder input information bits are not segmented, the L1 dynamic information 302 can be arranged in front of the L1 variable information 301. That is, even when the length of the L1 post-signaling information is smaller than the predetermined number of LDPC encoder information bits, the L1 dynamic information 302 may be arranged in front of the L1 variable information 301 when segmentation is not necessary. it can.

FIG. 4 illustrates a method for configuring LDPC encoder input information bits without segmenting L1 post-signaling information according to an embodiment of the present invention.
Referring to FIG. 4, the LDPC encoder input information bit includes L1 variable information 410 and L1 dynamic information 411, and the decoding performance of the bit located at the front of the input information bit is at the rear of the input information bit. If the decoding performance of the located bit is superior, the input information bit is configured by arranging the L1 dynamic information 411 at the front of the L1 variable information 410 as indicated by reference numeral 420.

FIG. 5 illustrates a method for configuring input information bits input to an encoder according to an embodiment of the present invention. In particular, FIG. 5 shows that a plurality of control information included in the L1 post-signaling information is segmented according to the segmentation value 2.
Referring to FIG. 5, the L1 post signaling 550 input to the encoder includes L1 variable information 500, L1 dynamic information of the current frame (or 'dynamic, current frame' or 'dynamic L1 post for the current frame. Signaling ') 501 and the L1 dynamic information of the frame transmitted thereafter is the L1 dynamic information of the next frame (or' dynamic, next frame 'or' dynamic L1 post signaling of the next frame ') 502 including. In particular, when the current frame is the Kth frame, the L1 dynamic information 502 of the next frame transmitted in the Kth frame includes the same value as the L1 dynamic information transmitted in the K + 1th frame. . The L1 dynamic information 502 of the next frame is selective information, and the transmitter can notify the receiver of the presence or absence of the L1 dynamic information of the next frame through L1 pre-signaling. For example, if the value of the L1 pre-signaling flag L1_REPETTION_FLG is 1, this means that there is L1 dynamic information for the next frame. On the other hand, if the value of L1_REPETITION_FLG is 0, this means that there is no L1 dynamic information for the next frame.

Each of the L1 variable information 500, the L1 dynamic information 501 of the current frame, and the L1 dynamic information 502 of the next frame is segmented into two parts. In particular, the L1 variable information 500 is divided into L1 variable information ₁ 504 and L1 variable information ₂ 505 as indicated by reference numeral 510. The L1 dynamic information 501 of the current frame is divided into L1 dynamic information ₁ 506 of the current frame and L1 dynamic information ₂ 507 of the current frame, as indicated by reference numeral 515. The L1 dynamic information 502 of the next frame is divided into L1 dynamic information ₁ 508 of the next frame and L1 dynamic information ₂ 509 of the next frame, as indicated by reference numeral 520.

During encoding, L1 variable information ₁ 504, L1 dynamic information ₁ 506 of the current frame, and L1 dynamic information ₁ 508 of the next frame are composed of first input information bits 530. Further, the L1 variable information ₂ 505, the L1 dynamic information ₂ 507 of the current frame, and the L1 dynamic information ₂ 509 of the next frame are configured by the second input information bits 535.
L1 configurable information ₁ 504 is arranged in L1 last part of the dynamic information ₁ 506 and the next frame of the L1 dynamic information ₁ 508 after the first input information bit 530 of the current frame.
Similarly, L1 configurable information ₂ 505, the L1 dynamic information ₂ 509 after the L1 dynamic information ₂ 507 and next frame 509 of the current frame, is located at the end portion of the second input information bit 535.

  As described above, the configuration of the first input information bit 530 and the second input information bit 535 is based on the excellent decoding performance of the bit located in the front part of the information bits as in LDPC coding. . Therefore, the actual positions of the L1 variable information 500 of the first input information bit 530 and the second input information bit 535, the L1 dynamic information 501 of the current frame, and the L1 dynamic information 502 of the next frame are the decoding performance. For example, depending on the encoding type used.

In addition, as described above with reference to FIG. 4, even when segmentation is not required, when the LDPC encoding method is used, the excellent decoding performance of the bits located in front of the input information bits is considered. Thus, the L1 dynamic information of the current frame may be located at the forefront of the input information bits, and the L1 variable information may be located at the end of the input information bits.
Therefore, regardless of whether segmentation is applied, the positions of the L1 dynamic information and the L1 variable information can be determined by the LDPC encoder in consideration of the encoding performance for the input information bits. That is, as described above, when the decoding performance of the bit located at the rear of the input information is superior to the decoding performance of the bit located at the front thereof, the L1 variable information is arranged at the front of the input information bits, The L1 dynamic information is arranged at the rear of the input information bit.

Also, the L1 variable information and the L1 dynamic information can be encoded / decoded independently of each other. In particular, when the L1 dynamic information includes the L1 dynamic information of the current frame and the L1 dynamic information of the next frame, as described above, the dynamic information of the current frame and the L1 dynamic information of the next frame are respectively segmented. The first input information bit corresponding to the unit input to the encoder is composed of the segmented current frame L1 dynamic information ₁ and the next frame L1 dynamic information ₁ . The second input information bit corresponding to the unit input to the encoder is composed of segmented current frame L1 dynamic information ₂ and next frame L1 dynamic information ₂ . Furthermore, regardless of whether segmentation is required, the L1 dynamic information of the current frame is placed at the front of the input information bits, and the L1 dynamic information of the next frame is at the back of the input information bits. Be placed.

FIG. 6 illustrates the segmentation of input information bits input to an encoder according to an embodiment of the invention. In FIG. 6, the segment value is N _{post_FEC_Block} .
Referring to FIG. 6, L1 post-signaling information 650, that is, input information bits input to the encoder are L1 variable information 600, L1 dynamic information 601 of the current frame, L1 dynamic information 602 of the next frame, and extended information 603. , Cyclic redundancy check (CRC) information 604 and L1 padding bits 605. CRC information 604 includes a parity bit of the CRC code, and an error occurs in L1 variable information 600, L1 dynamic information 601 of the current frame, L1 dynamic information 602 of the next frame, and extended information 603 at the receiver. Used to determine whether or not. Although not shown in FIG. 6, multiple CRCs may be used. In particular, it is apparent to those skilled in the art that the number and location of CRCs can be changed.

The length of the L1 variable information 600 is _{KL1_conf} , the length of the L1 dynamic information 601 of the current frame is _{KL1_dyn, c} , the length of the L1 dynamic information 602 of the next frame is _{KL1_dyn, n} , and the extension information 603 The length is K _{L1_ext} , and the length of CRC 604 is N _crc . When the length K _{L1_dyn, n} of the L1 dynamic information 602 of the next frame is 0, a value of 0 means that the L1 dynamic information 602 of the next frame is not used. If K _{L1_ext} is 0, this means that the extension information 603 is not used. Similarly, if N _crc is 0, it means that no CRC code is used.

_{Each of} K _{L1_conf} , K _{L1_dyn, c} , and K _{L1_dyn, n} can be expressed as a function of the number of _PLPs . In other words, _{KL1_conf} , _{KL1_dyn, c} , and _{KL1_dyn, n} are known through predetermined signaling. For example, _{L1_POST_CONF_SIZE} indicating K _{L1_conf,} L1_POST_DYN and CURRENT_SIZE indicating K _{L1_dyn, c} , L1_POST_DYN and NEXT_SIZE indicating K _{L1_dyn, n} , L1_POS_ indicating the length of the extended information 603, and L1_POS_ indicating the length of the extension information 603 It can be transmitted through the L1 pre-information 105.

When a BCH (Bose Chaudhuri Hocquenghem) code is concatenated with a low density parity check (LDPC) code, the BCH code concatenated with the LDPC code is used for L1 signaling information, and the length of the input bit of the BCH code is K _bch , N _{post_FEC_Block} corresponding to the number of encoded blocks of the L1 signaling information can be calculated using <Equation 1> below. Basically, N _{post_FEC_Block} is the number of pieces of information obtained by segmenting the L1 signaling information bits. When considering the concatenation of the BCH code and the LDPC code, the number of coding blocks is calculated using the input bit length K _bch of the BCH code. However, when only the LDPC code is used, the number of coding blocks can be calculated using the length K _ldpc of the input bit of the LDPC code instead of K _bch .

は、ｘより大きい最小整数を表す。例えば、

である。
符号化ブロックの個数に対応するＮ_{post_FEC_Block}に基づいて、ゼロビットが挿入される長さであるＫ_padは、下記の＜数式２＞のように計算できる。 In <Formula 1>, K _{post_ex_pad} is the _sum of the _lengths of the L1 variable information 600, the L1 dynamic information 601 of the current frame, the L1 dynamic information 602 of the next frame, the extended information 603, and the CRC information 604. K _{post_ex_pad} = K _{L1_conf} + K _{L1_dyn, c} + K _{L1_dyn, n} + K _{L1_ext} + N _crc That is, K _{post_ex_pad} is the number of bits of L1 post signaling excluding the padding field. In <Formula 1>,

Represents the smallest integer greater than x. For example,

It is.
Based on N _{post_FEC_Block} corresponding to the number of encoded blocks, K _pad which is a length in which zero bits are inserted can be calculated as in the following <Equation 2>.

は、ｘより大きい最小整数を表す。例えば、

である。ゼロビットが挿入される長さであるＫ_padは、省略可能である。
図３と図５を参照して説明したように、Ｌ１可変情報６００、現在フレームのＬ１動的情報６０１、次のフレームのＬ１動的情報６０２、拡張情報６０３、ＣＲＣ６０４、及びＬ１パディング６０５の各々がＮ_{post_FEC_Block}によりセグメント化される場合、各セグメントの長さは、下記の＜数式３＞〜＜数式６＞を用いて計算できる。
特に、長さがＫ_{L1_conf}であるＬ１可変情報６００に対する補正係数(correction factor)Ｋ_{L1_conf_PAD}は、下記の＜数式３＞によって計算できる。すなわち、Ｋ_{L1_conf_PAD}は、Ｌ１可変情報の長さＫ_{L1_conf}がセグメンテーションに対する符号化ブロックの個数に対応するＮ_{post_FEC_Block}の倍数でない場合に補正係数である。 In <Formula 2>,

Represents the smallest integer greater than x. For example,

It is. K _pad , which is the length in which zero bits are inserted, can be omitted.
As described with reference to FIGS. 3 and 5, each of the L1 variable information 600, the L1 dynamic information 601 of the current frame, the L1 dynamic information 602 of the next frame, the extended information 603, the CRC 604, and the L1 padding 605 Is _segmented by N _{post_FEC_Block} , the length of each segment can be calculated using the following <Equation 3> to <Equation 6>.
In particular, the correction factor for the L1 configurable information 600 length is K _{L1_conf} (correction factor) K _{L1_conf_PAD} may be calculated by <Equation 3> below. That, K _{L1_conf_PAD} is a correction coefficient when the length K _{L1_conf} of L1 variable information is not a multiple of N _{Post_FEC_Block} corresponding to the number of the coded blocks for segmentation.

は、ｘより小さい最大整数を表す。例えば、

である。Ｋ_{L1_conf_PAD}は、第ｉの(ｉ＝１，…,(Ｎ_{post_FEC_Block}−１))エンコーダ入力情報ビットのうちのＬ１可変情報_ｉ６００ｂの長さを

、第(Ｎ_{post_FEC_Block})のエンコーダ入力情報ビットのうち、Ｌ１可変情報６００ｃの長さを

にするために計算される値である。
例えば、Ｋ_{L1_conf}＝２９９及びＮ_{post_FEC_Block}＝２である場合、

である。 In <Equation 3>,

Represents the largest integer smaller than x. For example,

It is. K _{L1_conf_PAD} is the length of the L1 variable information _i 600b among the i th (i = 1,..., (N _{post_FEC_Block} −1)) encoder input information bits.

The length of the L1 variable information 600c among the (N _{post_FEC_Block} ) encoder input information bits

It is a value calculated to
For example, if K _{L1_conf} = 299 and N _{post_FEC_Block} = 2,

It is.

K _{L1_conf_PAD} having a value of 1 _sets the length of the L1 variable information ₁ in the first encoder input information bits to 149, and _sets the length of the L1 variable information ₂ in the second encoder input information bits to 149 + 1 = 150. To. These conditions are to prevent additional zero padding.
As shown in FIG. 6, the length K _{L1_dyn,} a _c, the length K _{L1_dyn} the correction factor for L1 dynamic information 601 of the current _{frame, C_PAD} may be calculated by <Equation 4>. K _{L1_dyn, c_PAD} is a correction coefficient when the length K _{L1_dyn, c} of the L1 dynamic information 601 of the current frame is not a multiple of N _{post_FEC_Block} which is the number of coding blocks for segmentation.

は、ｘより小さい最大整数を表す。
図６に示すように、長さがＫ_{L1_dyn,ｎ}である、次のフレームのＬ１動的情報６０２に対する補正係数の長さＫ_{L1_dyn,ｎ_PAD}は、＜数式５＞により計算できる。Ｋ_{L1_dyn,ｎ_PAD}は、次のフレームのＬ１動的情報の長さＫ_{L1_dyn,ｎ}がセグメント化のための符号化ブロックの個数であるＮ_{post_FEC_Block}の倍数でない場合の補正係数である。 In <Formula 4>,

Represents the largest integer smaller than x.
As shown in FIG. 6, the length K _{L1_dyn, n_PAD} of the correction coefficient for the L1 dynamic information 602 of the next frame whose length is K _{L1_dyn, n} can be calculated by <Equation 5>. K _{L1_dyn, n_PAD} is a correction coefficient when the length K _{L1_dyn, n} of the L1 dynamic information of the next frame is not a multiple of N _{post_FEC_Block} which is the number of coding blocks for segmentation.

は、ｘより小さい最大整数を表す。
上記したように、次のフレームのＬ１動的情報６０２は常に使用されるものではない。この場合に、Ｋ_{L1_dyn,n}が０と同一であることは当然である。＜数式３＞〜＜数式５＞に示すように、長さがＫ_{L1_ext}である拡張情報６０３、長さがＮ_crcであるＣＲＣ６０４、及び長さがＫ_padであるＬ１パディング６０５は、各々Ｎ_{post_FEC_Block}によりセグメント化される場合、拡張情報６０３＋ＣＲＣ６０４＋Ｌ１パディング６０５に対する補正係数の長さＫ_{L1_ext_PAD}は、下記の＜数式６＞を用いて計算される。 In <Formula 5>,

Represents the largest integer smaller than x.
As described above, the L1 dynamic information 602 of the next frame is not always used. In this case, it is natural that K _{L1 — dyn, n} is _equal to 0. As shown in <Equation 3> to <Equation 5>, the extended information 603 having a length of K _{L1_ext} , the _CRC 604 having a length of N _crc , and the L1 padding 605 having a length of K _pad are respectively N _{post_FEC_Block} , The length K _{L1_ext_PAD} of the correction coefficient for the extended information 603 + CRC 604 + L1 padding 605 is calculated using the following <Formula 6>.

は、ｘより小さい最大整数を表す。上記したように、Ｋ_padは必ず使用されるとは限らず、この場合に、Ｋ_padは０と同一である。また、Ｎ_crcは、ＣＲＣビットを意味する。
＜数式１＞〜＜数式６＞により計算された値を用いてｉ番目のエンコーダ入力情報ビット６７０に対応するＫ_sig(ｉ)を計算するプロセスは、＜数式７＞により定義される。 In <Expression 6>, K _{L1_ext_PAD} is a correction coefficient when the sum of the lengths of the extension information 603, CRC 604, and L1 padding 605 is not a multiple of the number of encoded blocks N _{post_FEC_Block} for the segment,

Represents the largest integer smaller than x. As described above, K _pad is not always used. In this case, K _pad is equal to 0. N _crc means a CRC bit.
The process of calculating K _sig (i) corresponding to the i-th encoder input information bit 670 using the values calculated by <Expression 1> to <Expression 6> is defined by <Expression 7>.

は、ｘより小さい最大整数を表す。例えば、

である。
第(Ｎ_{post_FEC_Block})のエンコーダ入力情報ビット６８０の個数は、＜数式８＞により計算できる。 In <Formula 7>,

Represents the largest integer smaller than x. For example,

It is.
The number of (N _{post_FEC_Block} ) encoder input information bits 680 can be calculated by <Equation 8>.

は、ｘより小さい最大整数を表す。
Ｋ_sig(ｉ)(ｉ＝１，…，(Ｎ_{post_FEC_Block}−１))とＫ_sig(Ｎ_{post_FEC_Block})との間の長さに差が発生するようにセグメント化が遂行されるが、Ｋ_sig(ｉ)(ｉ＝１，…，(Ｎ_{post_FEC_Block}−１))とＫ_sig(Ｎ_{post_FEC_Block})との間の長さに差が発生しないようにセグメント化が遂行されることもできる。また、上述したように、ＣＲＣの個数及び位置に従って数式は変更可能である。
例えば、ＣＲＣ符号がＬ１可変情報６００、現在フレームの動的情報６０１、及び次のフレームの動的情報６０２の各々に適用される場合、Ｋ_{L1_conf}、Ｋ_{L1_dyn,c}、及びＫ_{L1_dyn,n}は、Ｌ１可変情報６００のＣＲＣビットの数、現在フレームの動的情報６０１のＣＲＣビットの数、及び次のフレームの動的情報６０２のＣＲＣビットの数を含むことができる。 In <Formula 8>,

Represents the largest integer smaller than x.
_{K sig (i) (i =} 1, ..., (N post_FEC_Block -1)) but segmentation is performed such that a difference in length occurs between the _{K sig (N post_FEC_Block), K} sig ( i) _Segmentation can also be performed so that there is no difference in length between (i = 1,..., (N _{post_FEC_Block} −1)) and K _sig (N _{post_FEC_Block} ). Also, as described above, the mathematical formula can be changed according to the number and position of CRCs.
For example, when the CRC code is applied to each of the L1 variable information 600, the current frame dynamic information 601 and the next frame dynamic information 602, K _{L1_conf} , K _{L1_dyn, c} , and K _{L1_dyn, n} are: The number of CRC bits of the L1 variable information 600, the number of CRC bits of the dynamic information 601 of the current frame, and the number of CRC bits of the dynamic information 602 of the next frame may be included.

In FIG. 6, reference numeral 690 denotes (N _{post_FEC_Block} ) th bit from the first encoder input information bit obtained by segmenting all the encoder input information bits indicated by reference numeral 650 using <Equation 1> to <Equation 8>. Indicates the encoder input information bit. Segment operations are typically performed by an encoder, but if the encoder includes an interleaver, the interleaver interleaves (segments) all of the segmented encoder input information bits (ie, L1 signaling information). )can do.

More specifically, reference numeral 690 indicates that the first encoder input information bit 660 is an information bit _obtained by segmenting the encoder input information bits 600, _601, 602, _603, 604, and 605 with N _{post_FEC_Block} (segmented L1 Padding bits) 600a, 601a, 602a, 603a, 604a, 605a. Reference numeral 690 is an information bit _obtained by segmenting the encoder input information bits 600, _601, 602, _603, 604, and 605 with N _{post_FEC_Block} (different from the encoder input information bits 650). 600b, 601b, 602b, 603b, 604b, 605b are included. Reference numeral 690 is the last segmentation 600c of the information bits obtained by segmenting the encoder input information bits 600, _601, 602, _603, 604, and 605 with N _{post_FEC_Block} by the (N _{post_FEC_Block} ) encoder input information bits 680. 601c, 602c, 603c, 604c, and 605c are included.

  Therefore, the receiver that receives the input information bits 690 decodes the encoded block obtained by encoding each encoder input information bit 660, 670, 680. Thereafter, the receiver performs L1 dynamic information bits 601a, 601b, and 601c of the current frame segmented, L1 dynamic information bits 602a, 602b, and 602c of the next frame, and segmented L1 variable information bits 600a, 600b, and 600c. The segmented extended information bits 603a, 603b, 603c, the segmented CRC bits 604a, 604b, 604c, and the segmented L1 padding bits 605a, 605b, 605c are reassembled to the state before being segmented. Thus, the receiver can recover the original L1 post-signaling information.

The receiving apparatus according to an embodiment of the present invention may use the length K _{L1_conf} of the L1 variable information 600, the length K _{L1_dyn, c} of the L1 dynamic information 601 of the current frame, and the length K of the L1 dynamic information 602 of the next frame. _{If L1_dyn, n} is known, the receiving apparatus can easily restore the L1 post-signaling information. On the other hand, the transmission apparatus according to the embodiment of the present invention can transmit the values of K _{L1_conf} , K _{L1_dyn, c} , and K _{L1_dyn, n} . Since K _{L1_conf} , K _{L1_dyn, c} , and K _{L1_dyn, n} are each displayed as a function of the number of _PLPs, when the transmitting device transmits the number of _PLPs, the receiving device can restore the L1 post-signaling information. Therefore, when the transmitting apparatus includes NUM_PLP (PLP number) information corresponding to the number of PLPs in the L1 pre-information 105 shown in FIG. 1, the receiving apparatus can efficiently receive the L1 post-signaling information.

  As shown in FIG. 4, even if segmentation is not performed, if the transmitting apparatus transmits the number of PLPs, even if the L1 dynamic information 411 is transmitted before the L1 variable information 410, the receiving apparatus can To restore the L1 post-signaling information. Further, if the L1 dynamic information transmitted in the Kth frame is the same as the L1 dynamic information transmitted in the (K + 1) th frame, the receiving apparatus transmits the L1 post information in the (K + 1) th frame. When restoring, the L1 dynamic information of the Kth frame can be used regardless of whether or not the receiving apparatus has successfully decoded the L1 dynamic information in the Kth frame.

7 and 8 show information bits input to an encoder according to an embodiment of the present invention. In FIG. 7, the L1 dynamic information is located after the L1 variable information.
Referring to FIG. 7, the length of the L1 variable information 721 is K _{L1_conf} , the length of the L1 dynamic information 722 of the current frame is K _{L1_dyn, c} , and the length of the L1 dynamic information 723 of the next frame is K _{L1_dyn, n,} the length of the extension field 724 K _{L1_ext,} the length of CRC725 is n _crc.

The length K _{L1_conf} of the L1 variable information 721 is obtained using the parameter L1_POST_CONF_SIZE or the number of PLPs. The parameter (L1_POST_CONF_SIZE or the number of PLPs) is transmitted alone or together with L1 pre-signaling. The length K _{L1_dyn, c} of the L1 dynamic information 722 of the current frame is obtained using the number of parameters L1_POST_DYN, CURRENT_SIZE, or PLP. This parameter can be transmitted alone or together with L1 pre-signaling. The length K _{L1_dyn, n} of the L1 dynamic information 723 of the next frame is obtained using the number of parameters L1_POST_DYN, NEXT_SIZE, or PLP. This parameter can be sent alone or together with L1 pre-signaling. The length K _{L1_ext} of the extension field 724 can be obtained using the parameter L1_POST_EXT_SIZE. The length N _{crc of the} CRC 725 is fixed and may be 32, for example.

Referring to FIG. 7, the L1 post signaling 720 includes a variable number of bits transmitted through one or more LDPC blocks according to the length of the L1 post signaling. The LDPC block has the same meaning as the encoded block.
N _{post_FEC_Block} corresponding to the number of LDPC blocks for L1 post signaling 720 is determined using <Equation 9>.

である。Ａの値は、セグメント化以後の符号化ブロックでの情報ビットの数を示すＫ_sigがＫ_bchより小さいか又は等しいようにする補正係数であり、セグメント化した信号タイプの個数により変更可能である。例えば、Ｌ１可変情報７２１、現在フレームのＬ１動的情報７２２、次のフレームのＬ１動的情報７２３、及び拡張情報７２４が各々セグメント化される場合、４つの情報は、各々セグメント化される。したがって、Ａの値は、３である。 In <Formula 9>, N _{post_FEC_Block} is 1 when K _bch is greater than or equal to K _{post_ex_pad} . However, if K _bch is smaller than K _{post_ex_pad} , N _{post_FEC_Block} is

It is. The value of A is a correction coefficient that makes K _sig indicating the number of information bits in the encoded block after segmentation smaller than or equal to K _bch , and can be changed depending on the number of segmented signal types. . For example, when L1 variable information 721, L1 dynamic information 722 of the current frame, L1 dynamic information 723 of the next frame, and extended information 724 are each segmented, the four pieces of information are segmented. Therefore, the value of A is 3.

はｘ以上の最小整数を意味し、Ｋ_bchの値は、ＢＣＨ情報ビットの数を表す。
上記した場合において、ＢＣＨ符号をＬＤＰＣ符号と連結する場合、符号化ブロックの個数は、ＢＣＨ符号の入力ビットの長さＫ_bchを用いて計算される。しかしながら、ＬＤＰＣ符号のみが使用される場合には、符号化ブロックの個数は、Ｋ_bchの代わりにＬＤＰＣ符号の入力ビットの長さＫ_ldpcを用いて計算することができる。 If the L1 dynamic information 723 of the next frame is not used in any frame, the value of A is 2, but this A value can be fixed to 3 for system efficiency.
In <Formula 9>,

Means a minimum integer greater than _or equal to x, and the value of K _bch represents the number of BCH information bits.
In the above case, when the BCH code is concatenated with the LDPC code, the number of encoded blocks is calculated using the input bit length K _bch of the BCH code. However, when only the LDPC code is used, the number of coding blocks can be calculated using the length K _ldpc of the input bit of the LDPC code instead of K _bch .

K _{post_ex_pad} is a parameter L1_POST_CONF_SIZE that represents the length of the L1 variable information 721, the length of the L1 dynamic information 722 of the current frame, the length of the L1 dynamic information 723 of the next frame, and the length of the extension field 724, respectively. This is a value obtained by adding CRC 725 length N _crc to the sum of L1_POST_DYN, CURRENT_SIZE, L1_POST_DYN, NEXT_SIZE, and L1_POST_EXT_SIZE. K _{post_ex_pad} represents the number of bits of L1 post signaling excluding L1_PADDING 726 corresponding to the padding field. The CRC length N _crc is determined by the maximum length of the L1 post-signaling, and may be 32, for example. In this case, K _{L1_PADDING} , which is the length of the field of _{L1_PADDING 726} , can be calculated using <Formula 10> below.

In Equation 10, K _{L1_conf_PAD} is the length of the padding field for L1 variable information, K _{L1_dyn, c_PAD} is the length of the padding field for L1 dynamic information of the current frame, and K _{L1_dyn, n_PAD} is L1 of the next frame. K _{L1_ext_PAD} represents the length of the padding field for the dynamic information, and K _{L1_ext_PAD} represents the length of the padding field for the extension field 724 including the _CRC 725. The lengths of the padding fields L1_CONF_PAD727, L1_DYN, C_PAD728, L1_DYN, N_PAD729, and L1_EXT_PAD730 can be calculated using the following <Formula 11> to <Formula 14>.

In <Formula 11> to <Formula 14>, K _{L1_conf} , K _{L1_dyn, c} , K _{L1_dyn, n} , and K _{L1_ext} are parameters L1_POST_CONF_SIZE, L1_POST_DYN, CURRENT_SIZE, L1_POST_DYN, and NEXT_T_Z1_NEXT_T These parameters respectively represent the length of the L1 variable information, the length of the L1 dynamic information of the current frame, the length of the L1 dynamic information of the next frame, and the length of the extension field. The number of CRC bits N _crc is 32, for example. When L1_REPETTION_FLAG indicating whether or not the L1 dynamic information of the next frame is used is set to 0, the length of the L1 variable information K _{L1_dyn, n} of the next frame is 0.
K _post , which is the final length of the entire L1 post signaling including the padding field, is defined using <Equation 15> below.

At this time, the number K _sig of information bits in each N _{post_FEC_Block} block is defined using the following <Equation 16>.

  As shown in FIG. 7, in order to obtain better performance, L1 variable information (variable L1 post signaling) 721, L1 dynamic information of the current frame (dynamic L1 post signaling of the current frame) 722, and the next frame The L1 dynamic information (dynamic L1 post-signaling of the next frame) 723 is distributed as uniformly as possible in all FEC (Forward Error Correction) blocks.

ビットを含む。現在フレームの第１のＬ１動的情報７３２は、現在フレームのＬ１動的情報７２２のビットのうちの

ビットを含む。次のフレームの第１のＬ１動的情報７３３は、次のフレームのＬ１動的情報７２３のビットのうちの

ビットを含む。第１の拡張フィールド７３４は、拡張フィールド７２４のビットとＣＲＣ７２５のビットのうちの

ビットを含む。 In particular, the input bits of the first coding block shown in FIG. 7 are the first L1 variable information (variable ₁ or conf_1) 731, the first L1 dynamic information of the current frame (dynamic, current frame ₁ or D, C_1) 732, first L1 dynamic information (dynamic, nextFrame ₁ or D, N_1) 733 of the next frame, and a first extension field (Extension ₁ or E, C_1) 734. The first L1 variable information 731 is the bit of the L1 variable information 710.

Contains bits. The first L1 dynamic information 732 of the current frame includes the bits of the L1 dynamic information 722 of the current frame.

Contains bits. The first L1 dynamic information 733 of the next frame includes the bits of the L1 dynamic information 723 of the next frame.

Contains bits. The first extension field 734 includes the extension field 724 bits and the CRC 725 bits.

Contains bits.

According to an embodiment of the present invention, the first extension field 734 of the input bits of the first coding block includes both the extension field 724 and CRC 725 bits of L1 post-signaling. The above configuration is performed in the same way from the first encoded block to the (N _{post_FEC_Block} −1) encoded block.

ビットを含む。現在フレームの第ＮのＬ１動的情報７４０は、現在フレームのＬ１動的情報７２２のビットのうちの

ビットを含む。次のフレームの第ＮのＬ１動的情報７４１は、次のフレームのＬ１動的情報７２３のビットのうちの

ビットを含む。第Ｎの拡張フィールド７４２は、拡張フィールド７２４のビットとＣＲＣ７２５のビットのうち

ビットを含む。 The information bits in the (N _{post_FEC_Block} ) coded block are the Nth variable information (Configurable) _{Nth Nth} Nth, the Nth Nth variable information (Config _N ), the _{Nth Nth} Config_N, or the Nth _Nth Config_N Nth N Dynamic information (dynamic, currentFrame _N or D, C_N) 740, Nth L1 dynamic information of the next frame (dynamic, nextFrame _N or D, N_N) 741, Nth extension field (Extension _N or E , C_N) 742, and a padding field. The Nth variable information 739 includes bits of the variable information 710.

Contains bits. The Nth L1 dynamic information 740 of the current frame includes the bits of the L1 dynamic information 722 of the current frame.

Contains bits. The Nth L1 dynamic information 741 of the next frame includes the bits of the L1 dynamic information 723 of the next frame.

Contains bits. The Nth extension field 742 includes the extension field 724 bits and the CRC 725 bits.

Contains bits.

According to an embodiment of the present invention, the L1 post-signaling extension field 724 bit and the CRC 725 bit are all included in the first extension field 734 among the input bits of the first coding block. K _{L1_ext_PAD} is the length of the padding field for the bits of the extension field 724 and the CRC 725 of L1 post-signaling. 0 is inserted into the padding field. In addition, the position of the padding field can be changed.
For example, the entire padding field can be located at the end of the encoded input, as shown in FIG.

According to an embodiment of the present invention, the parameter L1_POST_EXT_SIZE is not set only to the length of the extension field, but first transmitted after being set to a value including the length of the extension field and the length of the CRC. , K _{L1_ext} is considered to be a value obtained by adding the length of the extension field and N _crc . In this case, all N _crc can be deleted.

FIG. 9 shows information bits input to an encoder according to an embodiment of the present invention.
Referring to FIG. 9, the length of the L1 variable information 921 is K _{L1_conf} , the length of the L1 dynamic information 922 of the current frame is K _{L1_dyn, c} , and the length of the L1 dynamic information 923 of the next frame is K _{L1_dyn, n} , the length of the extension field 924 is K _{L1 — ext} , and the length of the CRC 925 is N _crc .

The length K _{L1_conf} of the L1 variable information 921 can be obtained using the parameter L1_POST_CONF_SIZE or the number of PLPs. The length K _{L1_dyn, c} of the L1 dynamic information 922 of the current frame may be obtained using the number of parameters L1_POST_DYN, CURRENT_SIZE, or PLP. The length K _{L1_dyn, n} of the L1 dynamic information 923 of the next frame can be obtained using the parameter L1_POST_DYN, NEXT_SIZE, or the number of PLPs. The length K _{L1_ext} of the extension field 924 can be obtained using the parameter L1_POST_EXT_SIZE. The length N _{crc of the} CRC 925 may be 32, for example. In this case, the sum of the length of the L1 dynamic information 923 of the next frame and the length of the extension field 924 or the length of the CRC is displayed as one parameter. However, in the present invention, these parameters are separated for convenience of explanation. Assume that

Referring to FIG. 9, the L1 post signaling 920 includes a variable number of bits transmitted through one or more LDPC blocks according to the length of the L1 post signaling. The LDPC block has the same meaning as the encoded block shown in FIG.
N _{post_FEC_Block} corresponding to the number of LDPC blocks for L1 post signaling 920 is determined using <Equation 17>.

である。Ａの値は、セグメント化以後の符号化ブロックでの情報ビットの数を示すＫ_sigがＫ_bchより小さいか又は等しいようにする補正係数であり、セグメント化したシグナリングタイプの個数により変更可能である。 In <Expression 17>, N _{post_FEC_Block} is 1 when K _bch is greater than or equal to K _{post_ex_pad} . However, if K _bch is smaller than K _{post_ex_pad} , N _{post_FEC_Block} is

It is. The value of A is a correction coefficient that makes K _sig indicating the number of information bits in a coded block after segmentation smaller than or equal to K _bch and can be changed depending on the number of segmented signaling types. .

はｘ以上の最小整数を意味し、Ｋ_bchの値は、ＢＣＨ情報ビットの数を表す。上記したように、ＢＣＨ符号をＬＤＰＣ符号と連結する場合、符号化ブロックの個数は、ＢＣＨ符号の入力ビットの長さＫ_bchを用いて計算される。しかしながら、ＬＤＰＣ符号のみが使用される場合には、符号化ブロックの個数は、Ｋ_bchの代わりにＬＤＰＣ符号の入力ビットの長さＫ_ldpcを用いて計算することができる。 For example, when the L1 variable information 921, the L1 dynamic information 922 of the current frame, the L1 dynamic information 923 of the next frame, and the extension information 924 are segmented, the three pieces of information are each segmented. Therefore, the value of A is 2.
In <Equation 17>,

Means a minimum integer greater than _or equal to x, and the value of K _bch represents the number of BCH information bits. As described above, when the BCH code is concatenated with the LDPC code, the number of encoded blocks is calculated using the input bit length K _bch of the BCH code. However, when only the LDPC code is used, the number of coding blocks can be calculated using the length K _ldpc of the input bit of the LDPC code instead of K _bch .

K _{post_ex_pad} is a parameter L1_POST_CONF_SIZE that represents the length of the L1 variable information 921, the length of the L1 dynamic information 922 of the current frame, the length of the L1 dynamic information 923 of the next frame, and the length of the extension field 924, respectively. This is a value obtained by adding the length N _{crc of} CRC 925 to the sum of L1_POST_DYN, CURRENT_SIZE, L1_POST_DYN, NEXT_SIZE, and L1_POST_EXT_SIZE. K _{post_ex_pad} represents the number of bits of L1 post signaling excluding L1_PADDING 926 corresponding to the padding field. The CRC length N _crc is determined by the maximum length of L1 post-signaling.
K _{L1_PADDING} , which is the length of the field of L1_PADDING 926, can be calculated using <Equation 18> below.

In Equation 18, K _{L1_conf_PAD} is the length of the padding field for the L1 variable information, K _{L1_dyn, c_PAD} is the length of the padding field for the L1 dynamic information of the current frame, and K _{L1_ext_PAD} is the L1 dynamic of the next frame. The length of the padding field for the extension field 924 including the information 923 and the CRC 925 is represented respectively. The lengths of the padding fields L1_CONF_PAD927, L1_DYN, C_PAD928, and L1_EXT_PAD930 can be calculated using the following <Formula 19>, <Formula 20>, and <Formula 21>.

In <Equation 19> to <Equation 21>, K _{L1_conf} , K _{L1_dyn, c} , K _{L1_dyn, n} , and K _{L1_ext} are parameters L1_POST_CONF_SIZE, L1_POST_DYN, CURRENT_SIZE, L1_POST_DYN_EZ1_NEXT_T . These parameters respectively represent the length of the L1 variable information 921, the length of the L1 dynamic information 922 of the current frame, the length of the L1 dynamic information 923 of the next frame, and the length of the extension field 924. N _crc corresponding to the number of CRC bits may be 32, for example.

When L1_REPETTION_FLAG indicating whether or not the L1 dynamic information of the next frame is used is set to 0, the length of the L1 dynamic information K _{L1_dyn, n} of the next frame is 0. In this case, the sum of the length of the dynamic information of the next frame and the length of the extension field can be displayed with one parameter. For example, (K _{L1_dyn, n} + K _{L1_ext} ) is represented by K _{L1_dyn, n, ext} , and this K _{L1_dyn, n, ext} (L1_POST_DYN, N, EXT_SIZE) can be obtained using parameters representing each length.
K _post , which is the final length of the entire L1 post signaling including the padding field, is defined using <Equation 22> below.

The number of information bits K _{sig in} each N _{post_FEC_Block} block is defined by the following <Equation 23>.

  As shown in FIG. 9, in order to obtain better performance, L1 variable information (variable L1 post-signaling) 921, current frame L1 dynamic information (current frame dynamic L1 post-signaling) 922, and next frame The L1 dynamic information (dynamic L1 post signaling in the next frame) 923 and the extension field 924 are distributed as evenly as possible in all FEC blocks.

ビットを含む。現在フレームの第１のＬ１動的情報９３２は、現在フレームのＬ１動的情報９２２のビットのうちの

ビットを含む。第１の拡張フィールド９３４は、次のフレームのＬ１動的情報９２３のビット、拡張フィールド９２４のビット、及びＣＲＣ９２５のビットのうちの

ビットを含む。上記の構成は、第１の符号化ブロックから第(Ｎ_{post_FEC_Block}−１)の符号化ブロックまで同一の方法で遂行される。 In particular, the input bits of the first coding block are the first L1 variable information (variable ₁ or conf_1) 931, the first L1 dynamic information (dynamic, currentframe ₁ or D, C_1) 932 of the current frame, And a first extension field (Extension ₁ or E, C_1) 934. The first L1 variable information 931 is a bit of the L1 variable information 910.

Contains bits. The first L1 dynamic information 932 of the current frame includes the bits of the L1 dynamic information 922 of the current frame.

Contains bits. The first extension field 934 includes the L1 dynamic information 923 bit, the extension field 924 bit, and the CRC 925 bit of the next frame.

Contains bits. The above configuration is performed in the same way from the first encoded block to the (N _{post_FEC_Block} −1) encoded block.

ビットを含む。現在フレームの第ＮのＬ１動的情報９４０は、現在フレームのＬ１動的情報９２２のビットのうち

ビットを含む。第Ｎの拡張フィールド９４２は、次のフレームの第ＮのＬ１動的情報９２３のビット、拡張フィールド９２４のビット、及びＣＲＣ９２５のビットのうちの

ビットを含む。０は、パディングフィールドに挿入される。さらに、パディングフィールドの位置は変更可能である。例えば、パディングフィールドは、符号化入力の最後に位置できる。 The information bits in the (N _{post_FEC_Block} ) encoded block are the Nth variable information (Configurable _N or Conf_N) 939 and the Nth L1 dynamic information of the current frame, such as L1_CONF_PAD927, L1_DYN, C_PAD928, and L1_EXT_PAD930. (Dynamic, currentFrame _N or D, C_N) 940, Nth extension field (Extension _N or E, C_N) 942, and a padding field. The Nth variable information 939 includes bits of the variable information 910.

Contains bits. The Nth L1 dynamic information 940 of the current frame includes the bits of the L1 dynamic information 922 of the current frame.

Contains bits. The Nth extension field 942 includes the Nth L1 dynamic information 923 bit, the extension field 924 bit, and the CRC925 bit of the next frame.

Contains bits. 0 is inserted into the padding field. Furthermore, the position of the padding field can be changed. For example, the padding field can be located at the end of the encoded input.

In another embodiment of the present invention, segmentation is performed when the L1 dynamic information 722 of the current frame, the L1 dynamic information 723 of the next frame, the extension field 724, and the CRC 725 are considered as one field. The In this case, the information acquired in the previous frame is not used in the L1 dynamic information 723, extension field 724, and CRC 725 of the next frame, and L1 post-signaling is performed in the L1 dynamic information 732 and extension field 724 of the next frame. May or may not be included. Therefore, the L1 dynamic information 723, the extension field 724, and the CRC 725 of the next frame can be performed by considering the field as one field for easy segmentation.
In this case, the correction coefficient A can be 1 in <Equation 17>. Based on the value N _{post_FEC_Block} calculated using <Equation 17>, the length K _{L1_PADDING} of the field L1_PADDING726 can be calculated using <Equation 24>.

In Equation 24, K _{L1_conf_PAD} represents the length of the padding field for the L1 variable information, and K _{L1_ext_PAD} is an extension field including L1 dynamic information 722 of the current frame, L1 dynamic information 723 of the next frame, and CRC 725. It represents the length of the padding field for 724. The lengths of the padding fields L1_CONF_PAD and L1_EXT_PAD can be calculated using <Equation 25> and <Equation 26>, respectively.

In <Equation 25> and <Equation 26>, K _{L1_conf} , K _{L1_dyn, c} , K _{L1_dyn, n} , and K _{L1_ext} are parameters L1_POST_CONF_SIZE, L1_POST_DYN, CURRENT_SIZE_, and L1_POST_DY_S . These parameters represent the length of the L1 variable information 721, the length of the L1 dynamic information 722 of the current frame, the length of the L1 dynamic information 723 of the next frame, and the length of the extension field 724, respectively. N _crc which is the number of CRC bits may be 32, for example.
When L1_REPETTION_FLAG indicating whether or not the L1 dynamic information of the next frame is used is set to 0, the length K _{L1_dyn, n} of the L1 dynamic information of the next frame is 0. In this case, the sum of the length of the dynamic information of the current frame, the length of the dynamic information of the next frame, and the length of the extension field can be displayed with one parameter.

In another embodiment of the invention, the L1 post signaling does not include the extension field 724. In this case, the value of K _{L1_ext} is 0, and only the segmented bits of the CRC field 725 are included in the extension fields 734, 738, and 742 among the segmented information bits input to the encoded block. In this case, the number of segmented bits in the CRC field is very small, so it may be inefficient to first segment extension field 724 and CRC field 725 to form extension fields 734, 738, 742. . Therefore, in this case, it may be efficient to segment the CRC field 725 with the L1 dynamic information 723 of the next frame.

Specifically, instead of segmenting the extension field 724 and the CRC field 725 simultaneously (since the value of the extension field is 0), the L1 dynamic information 723 and the CRC field 725 of the next frame are segmented at the same time. The first L1 dynamic information 733 of the next frame, the second L1 dynamic information 737 of the next frame, and the (N _{post_FEC_Block} ) L1 dynamic information 741 of the next frame include the segmented next frame It consists of L1 dynamic information 723 and a CRC field 725.

In another embodiment of the present invention, the extension field and next frame L1 dynamic information 723 are not present. In this case, as described in the above embodiment, the number of segmented bits in the CRC field is very small and the segments are inefficient. Thus, in this case, the CRC field 725 is segmented with the L1 dynamic information 722 of the current frame, and the first L1 dynamic information 731 of the current frame, the second dynamic information 735 of the current frame, and the current frame The (N _{post_FEC_Block} ) dynamic information 739 includes a segmented CRC field 725 and L1 dynamic information 722 of the current frame.

FIG. 10 is a flowchart illustrating a method for encoding and transmitting control information by a transmission apparatus according to an embodiment of the present invention.
Referring to FIG. 10, in step 1000, the transmitting apparatus determines L1 signaling information and generates L1 pre-information and L1 post-signaling information. However, since the present invention relates to encoding of L1 post-signaling information, the encoding of L1 pre-information will not be described later.

  In step 1002, the transmitting apparatus determines the number of bits of the L1 post-signaling information excluding the padding field. In step 1004, the transmitting apparatus determines the number of coding blocks used for transmission of the L1 post-signaling bits based on the number of bits of the L1 post-signaling information excluding the padding field and the coding unit. Here, the encoding unit is a size based on what the encoder encodes at a time, and is referred to as “the number of encoder input information bits”. When BCH coding is concatenated with LDPC coding, the coding unit is the number of information bits input to the BCH encoder, and is also referred to as BCH information bits. Also, the number of bits of L1 post-signaling information excluding the padding field is the number of bits of L1 variable information, the number of bits of L1 dynamic information for the current frame, the number of bits of L1 dynamic information for the next frame, and CRC and extension It is the same as the sum of the number of bits in the field.

In step 1006, the transmission device segments the L1 post-signaling information according to the determined number of encoded blocks. This segmentation method can use the above mathematical formula.
More specifically, in step 1006, first, a plurality of information (L1 variable information bits, L1 dynamic information bits for the current frame, L1 dynamic information bits for the next frame, and CRC and extension field bits). ) Calculate the number of padding bits corresponding to the correction factor for each. The number of all padding bits of L1 post-signaling is obtained by adding the calculated number of padding bits of information.

  Thereafter, the number of bits of L1 post-signaling is calculated using the number of padding bits of L1 post-signaling and the number of bits of L1 post-signaling information excluding the padding field. The number of input bits of each coding block is obtained by dividing the calculated number of L1 post-signaling bits by the number of coding blocks. In other words, encoding is performed by inputting as many L1 post-signaling bits as the acquired number of input bits to the encoder.

  Next, each of the plurality of pieces of information (L1 variable information bits, L1 dynamic information bits for the current frame, L1 dynamic information bits for the next frame, and CRC and extension field bits) was determined. Segmented according to the number of encoded blocks, input bits for a code block having a length corresponding to the number of acquired input bits are constructed. In each of the above information, the number of input bit groups for the configured code block is the same as the determined number of coding blocks.

In step 1008, the transmission apparatus includes the L1 post-signaling information segmented in step 1006 in each of the first encoder input information bits to the (N _{post_FEC_Block} ) encoder input information bits. In step 1010, the transmitter _encodes the first encoder input information bits to the (N _{post_FEC_Block} ) encoder input information bits and transmits them to the receiver.
In step 1012, the transmitting apparatus transmits the number of bits of the L1 post-signaling information, the number of encoded blocks, or the number of PLPs to the receiving apparatus, and then moves to the next frame in step 1014. Step 1000 to step 1012 are repeated.

Although it has been described in FIG. 10 that step 1012 is performed after step 1010 is performed, step 1012 may be performed before step 1010. Further, although it has been described that the transmitting apparatus transmits the number of bits of the L1 post-signaling information, the number of encoded blocks, or the number of PLPs to the receiving apparatus in Step 1012, the transmitting apparatus transmits all information or information Only some of them (for example, the number of PLPs) may be transmitted.
For example, in the broadcasting / communication system according to an embodiment of the present invention, the transmission apparatus does not transmit the number of coding blocks, and the number of bits of L1 post-signaling information and information on the signaling code (LDPC codeword length and coding). In this case, the receiving apparatus can estimate the number of encoded blocks using this information.

FIG. 11 is a flowchart illustrating a method for receiving control information by a receiving apparatus according to an embodiment of the present invention.
Referring to FIG. 11, in step 1100, the receiving apparatus receives L1 signaling information of a current frame. In step 1102, the receiving apparatus obtains at least one of the number of bits of the L1 post-signaling information transmitted in the current frame, the number of encoded blocks, and the number of PLPs. Here, the receiving apparatus can receive the number of bits of the L1 post-signaling information or the number of encoded blocks from the transmitting apparatus, or can use predetermined information. This option can vary depending on the user of the system. In addition, L1 pre-information is received in step 1100. In the present invention, since L1 post-signaling information is targeted, the L1 pre-information is performed by a broadcasting / communication system to which the present invention is applied. It is processed. Therefore, a more detailed description of the L1 pre-information is omitted.

  In step 1104, the receiving apparatus decodes the received encoded block. In step 1106, the receiving apparatus extracts segmented L1 post-signaling information included in each decoded encoded block. In step 1008, the receiving apparatus reassembles the L1 post-signaling information bits extracted in step 1106 to return to the state before segmenting.

In step 1110, the reception apparatus receives data using the L1 signaling information other than the L1 post signaling information reassembled in step 1108 and the L1 post signaling information received in step 1100.
In step 1112, the receiving apparatus moves to the next frame and repeats the operation for the next frame in steps 1100 to 1110.

FIG. 12 is a block diagram illustrating a transmission apparatus 1200 according to an embodiment of the present invention.
Referring to FIG. 12, the L1 signaling information generator 1202 generates L1 signaling information of the current frame. Specifically, the L1 signaling information generator 1202 generates L1 pre-information and L1 post-signaling information and outputs them to the encoder 1204. However, since the present invention relates to encoding the L1 post-signaling information, the L1 pre-information is encoded by the broadcasting / communication system to which the present invention is applied. Here, the L1 pre-information is described in detail. I do not explain.

  The controller 1206 determines the number of bits of the L1 post-signaling information excluding the padding field generated by the L1 signaling information generator 1202. The controller 1206 determines the number of coding blocks to be used to transmit the L1 post-signaling bits based on the determined number of bits of the L1 post-signaling information excluding the padding field and the coding unit. The controller 1206 can also determine the number of PLPs.

  When the number of coding blocks is determined by the controller 1206, the L1 post-signaling information is segmented according to the determined number of coding blocks. Further, if encoder 1204 includes an interleaver, controller 1206 controls the interleaver to segment the L1 post-signaling information. In other words, the controller 1206 controls the L1 signaling information generator 1202 to segment the L1 post-signaling information. This segment method can use the above mathematical formula.

  More specifically, the controller 1206 includes a plurality of pieces of information (L1 variable information bits, L1 dynamic information bits of the current frame, L1 dynamic information bits of the next frame, and CRC and extension field bits). The number of padding bits corresponding to the correction factor for each of the first is calculated. The controller obtains the total number of padding bits of the L1 post-signaling by adding the calculated number of padding bits of the plurality of information. The controller calculates all the number of bits of the L1 post signaling using the number of bits of the padding for the acquired L1 post signaling and the number of bits of the L1 post signaling information excluding the determined padding field. The number of input bits required per coding block can be obtained by dividing the calculated number of L1 post-signaling bits by the number of coding blocks determined. In other words, encoding is performed by inputting as many L1 post-signaling bits as the number of acquired input bits to the encoder.

  The controller determines a plurality of pieces of information (L1 variable information bits, L1 dynamic information bits for the current frame, L1 dynamic information bits for the next frame, and CRC and extension field bits). A control operation is performed so as to perform segmentation according to the number of input bits, and control is performed so as to configure input bits for a code block having a length corresponding to the number of acquired input bits. The number of input bit groups for the configured code block is the same as the determined number of encoded blocks.

The controller 1206 controls the encoder 1204 or the L1 signaling information generator 1202 so that the segmented L1 post-signaling information is included in the (N _{post_FEC_Block} ) th encoder input information bits from each first encoder input information bit. The encoder 1204, the encoder input information bits of the _(N post_FEC_Block) from the first encoder input information bits is encoded and outputted from the first code or block coding block of the _(N post_FEC_Block) to the transmitter 1208. The transmitter 1208 transmits the encoded block to the receiving device in units of frames under the control of the controller 1206. The transmitter 1208 can transmit the number of PLPs determined by the controller 1206 to the receiving device.

FIG. 13 is a block diagram showing a receiving apparatus 1300 according to the present invention.
Referring to FIG. 13, the receiver 1302 receives the L1 signaling information of the current frame and outputs it to the decoder 1304. In addition, the receiver 1302 receives at least one of the number of bits of the L1 post-signaling information transmitted in the current frame, the number of encoded blocks, and the number of PLPs, and outputs the received signal to the controller 1306. Here, the controller 1306 can receive the number of bits of the L1 post-signaling information, the number of encoded blocks, or the number of PLPs from the transmission apparatus, and can use predetermined information. This can vary depending on the user of the system. In addition, the receiver 1302 also receives L1 pre-information, but since the present invention targets L1 post-signaling information, the L1 pre-information is processed in a manner performed by a broadcasting / communication system to which the present invention is applied. Therefore, a more detailed description of the L1 pre-information is omitted.
The decoder 1304 decodes the received encoded block.

According to an embodiment of the present invention, the controller 1306 performs a control operation of extracting segmented L1 post-signaling information included in each decoded encoded block. The reassembler 1308 reassembles the bits of the L1 post-signaling information extracted under the control of the controller 1306 in order to return to the state before segmenting. That is, the controller 1306 calculates a segment value using one of the number of bits of the L1 post-signaling information, the number of encoded blocks, and the number of PLPs, and notifies the reassembler 1308 of the segment value. Accordingly, the controller 1306 can reverse the process performed by the transmitting device to restore the original L1 post-signaling information.
Controller 1306 controls receiver 1302 to receive data using the reassembled L1 post-signaling information bits and L1 signaling information other than L1 post-signaling information.

As described above, the L1 variable information and the L1 dynamic information are referred to as “L1 post-signaling information”, which is used when the present invention is applied to DVB-T2 (Digital Video Broadcasting Terrestrial 2). It is a term. Accordingly, when the present invention is applied to DVB-C2 (Digital Video Broadcasting Cable 2), the L1 variable information and the L1 dynamic information are also referred to as “part-to-signaling information”.
Therefore, the above-described embodiment of the present invention can be realized by a computer recordable code on a non-transitory computer recordable recording medium.

For example, a computer recordable recording medium is any data storage device that stores data read by a computer system.
Examples of persistent computer recordable recording media include ROM (Read Only Memory), RAM (Random Access Memory), compact disc (CD), magnetic tape, floppy disk, and optical data storage device. . However, it is not limited to these examples of the present invention.

  As described above, the specific embodiments have been described in the detailed description of the present invention. However, various modifications can be made without departing from the scope and spirit of the present invention. It is clear to those who have it. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined based on the description of the scope of claims and equivalents thereof.

1200 Transmitter 1202 L1 Signaling Information Generator 1204 Encoder 1206 Controller 1208 Transmitter 1300 Receiver 1302 Receiver 1304 Decoder 1306 Controller 1308 Reassembler

Claims (18)

A method for transmitting signaling information by a transmitter in a broadcast / communication system, comprising:
Generating signaling information including a plurality of parts ;
Determining the number of encoded blocks in which the signaling information is encoded based on the number of bits of the signaling information and the number of bits of encoder input information ;
Segmenting each part of the signaling information into pieces based on the number of the coded blocks;
Configuring the input information bits of each coding block to include one of each piece segmented in each portion of the signaling information;
Encoding input information bits of each encoding block;
Transmitting each encoded block. A method comprising: A method for receiving signaling information by a receiver in a broadcast / communication system, comprising:
And receiving a coded block of the signaling information, the signaling information includes a plurality of portions, each portion of the signaling information is segmented into pieces based on the number of coding blocks of the signaling information , Step and
Obtaining the number of bits of the signaling information ;
Obtaining the number of coding blocks of the signaling information based on the number of bits of the signaling information and the number of bits of encoder input information;
Decoding the received encoded block based on the number of encoded blocks of the signaling information ;
Extracting segmented signaling information bits included in the decoded encoded block;
Restoring the extracted segmented signaling information bits to a state prior to segmentation, and
Each of the coding blocks includes one of pieces segmented in each part of the signaling information .   The method according to claim 1, wherein the signaling information includes layer 1 (L1) variable information and L1 dynamic information. The L1 dynamic information is
4. The method of claim 3, comprising L1 dynamic information for a current frame and L1 dynamic information for a next frame.   The method of claim 3, wherein the signaling information further includes at least one of an extension field, a cyclic redundancy check (CRC) field, and a padding field. The number of coding blocks is defined by the following equation:

_Herein, N post_FEC_Block represents the number of coded _blocks, K post_ex_pad represents the number of CIGNA ring bit excluding the padding field, K _bch is a the number of bits that the encoder is encoded at a time as a unit of coding Represents the number of BCH information bits that can be input to the BCH encoder when BCH (Bose Chaudhuri Hocquenghem) coding is concatenated with low density parity check (LDPC) coding, and A represents a correction coefficient. 3. A method according to claim 1 or a method according to claim 2. The length of the padding field is defined by the following equation:

Here, K _{L1_PADDING} represents the length of the Padding field, K _{L1_conf_PAD} represents the length of the Padding field for L1 configurable _information, K _{L1_dyn,} c_PAD now represents the length of the Padding field for L1 dynamic information of the frame, The K _{L1_dyn, n_PAD} represents the length of the padding field for the L1 dynamic information of the next frame, and the K _{L1_ext_PAD} represents the length of the padding field for the extension field including the CRC. Method. K _{L1_conf_PAD} is defined by the following formula:

K _{L1_dyn, c_PAD} is defined by the following equation:

K _{L1_dyn, n_PAD} is defined by the following equation:

K _{L1_ext_PAD} is defined by the following formula:

Here, K _{L1_conf} represents the length of the L1 variable information, K _{L1_dyn, c} represents the length for the L1 dynamic information of the current frame, and K _{L1_dyn, n} represents the length for the L1 dynamic information of the next frame. The method of claim 7, wherein K _{L1_ext} represents the length of the extension field and N _crc represents the length of the CRC field. The length of the input information bits of each coding block is defined by the following equation:

Here, K _sig represents the length of input information bits of each coding block, N _{post_FEC_Block} represents the number of coding blocks, and K _post is defined by the following equation:

_3. The method according to claim 1, wherein K _{post_ex_pad} represents the number of signaling bits excluding the padding field, and K _{L1_PADDING} represents the length of the padding field. . An apparatus for transmitting signaling information in a broadcast / communication system,
A layer 1 (L1) signaling information generator for generating signaling information including a plurality of pieces ;
Based on the number of bits of the signaling information and the number of bits of encoder input information, determine the number of coding blocks in which the signaling information is encoded ,
Input information bits of each coding block to segment each part of the signaling information into pieces according to the determined number of coding blocks and to include one of the pieces segmented by each part of the signaling information A controller that controls to constitute
An encoder configured to configure input information bits of each coding block under the control of the controller, and to encode the input information bits of each coding block into each coding block;
A transmitter for transmitting each encoded block. An apparatus for receiving signaling information in a broadcast / communication system,
A receiver for receiving the encoded blocks of the signaling information, the signaling information includes a plurality of portions, each portion of the signaling information is segmented into pieces based on the number of coding blocks of the signaling information The receiver,
A decoder for decoding the encoded block;
Obtaining the number of bits of the signaling information, obtaining the number of coding blocks of the signaling information based on the number of bits of the signaling information and the number of bits of the encoder input information, and obtaining the number of coding blocks of the signaling information A controller for extracting segmented signaling information bits included in the decoded encoded block based on :
A reassembler that reassembles the segmented signaling information bits to a state prior to segmentation;
Each of the coding blocks includes one of pieces segmented in each part of the signaling information .   The device according to claim 10 or the device according to claim 11, wherein the signaling information includes layer 1 (L1) variable information and L1 dynamic information.   The apparatus of claim 12, wherein the L1 dynamic information includes L1 dynamic information of a current frame and L1 dynamic information of a next frame.   The apparatus of claim 12, wherein the signaling information further includes at least one of an extension field, a cyclic redundancy check (CRC) field, and a padding field. The number of coding blocks is defined by the following equation:

Here, N _{post_FEC_Block} represents the number of coding blocks, K _{post_ex_pad} represents the number of signaling bits excluding the padding field, K _bch represents the number of bits encoded by the encoder at a time as a coding unit, and K _bch represents the number of BCH information bits that can be input to the BCH encoder when BCH (Bose Chaudhuri Hocquenghem) coding is concatenated with low density parity check (LDPC) coding, and A represents a correction coefficient. 12. The device according to claim 10 or the device according to claim 11. The length of the padding field is defined by the following equation:

Here, K _{L1_PADDING} represents the length of the Padding field, K _{L1_conf_PAD} represents the length of the Padding field for L1 configurable _information, K _{L1_dyn,} c_PAD now represents the length of the Padding field for L1 dynamic information of the frame, The _{method of claim 14, wherein} K _{L1_dyn, n_PAD} represents a length of a padding field for L1 dynamic information of the next frame, and K _{L1_ext_PAD} represents a length of a padding field for an extension field including a CRC. apparatus. K _{L1_conf_PAD} is defined by the following formula:

K _{L1_dyn, c_PAD} is defined by the following equation:

K _{L1_dyn, n_PAD} is defined by the following equation:

K _{L1_ext_PAD} is defined by the following formula:

Here, K _{L1_conf} represents the length of the L1 variable information, K _{L1_dyn, c} represents the length for the L1 dynamic information of the current frame, and K _{L1_dyn, n} represents the length for the L1 dynamic information of the next frame. The apparatus of claim 16, wherein K _{L1_ext} represents a length of an extension field and N _crc represents a length of a CRC field. The length of the input information bits of each coding block is defined by the following equation:

Here, K _sig represents the length of input information bits of each coding block, N _{post_FEC_Block} represents the number of coding blocks, and K _post is defined by the following equation:

Here, K _{Post_ex_pad} represents the number of signaling bits except padding field, K _{L1_PADDING} the apparatus according to the apparatus or claim 11 of claim 10 which represents the length of the Padding field, it is characterized by .

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