# US 8,787,497 B2 · Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,497 B2 - Document ID: US8787497B2 - Status: Granted - Kind: B2 - Application number: 13/145,778 - Filed: 2009-07-23 - Published: 2011-11-10 - Granted: 2014-07-22 - Earliest claimed: 2009-02-12 - Assignees: LG Electronics Inc. - Applicants: Woo Suk Ko; Sang Chul Moon - Inventors: Woo Suk Ko; Sang Chul Moon - Web page: https://patentgrep.com/patent/US8787497B2 ## CPC - H04L 27/2602: {Signal structure} - H03M 13/1102: {Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes} - H03M 13/1105: {Decoding} - H03M 13/152: {Bose-Chaudhuri-Hocquenghem [BCH] codes} - H03M 13/2792: {Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing} - H03M 13/29: combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes - H03M 13/2906: {using block codes (H03M13/2957 takes precedence)} - H04L 1/0041: {Arrangements at the transmitter end} - H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)} - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/02: Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation (H04L27/32 takes precedence) - H04L 27/34: Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems - G11B 20/1833: {by adding special lists or symbols to the coded information (G11B20/1806, G11B20/1866 take precedence)} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract The present invention relates to a method of transmitting and a method of receiving signals and corresponding apparatus. One aspect of the present invention relates to an efficient L1 signaling method for an efficient transmitter and an efficient receiver using the efficient L1 signaling method for an efficient cable broadcasting. ## Claims ### Claim 1 A transmitter for transmitting broadcasting data to a receiver, the transmitter comprising: a first processor configured to process Layer 1 signaling data for signaling service data; and a second processor configured to process the service data, wherein the first processor comprises: a first BCH encoder configured to BCH encode the Layer 1 signaling data; a first low-density parity-check (LDPC) encoder configured to LDPC encode the BCH-encoded Layer 1 signaling data to generate at least one LDPC parity bit; a puncturing element configured to perform puncturing on the generated at least one LDPC parity bit; a first bit interleaver configured to bit interleave the LDPC-encoded Layer 1 signaling data and the punctured at least one LDPC parity bit; a first demultiplexer configured to demultiplex the bit-interleaved Layer 1 signaling data into cell words; and a first QAM mapper configured to map the cell words into constellation values of the L1 signaling data, wherein the second processor comprises: a second BCH encoder configured to BCH encode the service data to generate an error protected data; a second LDPC encoder configured to LDPC encode the BCH-encoded service data; a second bit interleaver configured to bit interleave the LDPC-encoded service data; a second demultiplexer configured to demultiplex the bit-interleaved service data into cell words; and a second QAM mapper configured to map the cell words into constellation values of the service data, and wherein the Layer 1 signaling data have Program Specific Information (PSI) and Service Information (SI) reprocessing information for each physical path carrying the service data, the PSI/SI reprocessing information indicating whether a PSI/SI reprocessing has been performed. ### Claim 2 (depends on 1) The transmitter of claim 1, wherein the second processor further comprises: a time interleaver configured to time interleave the mapped constellation values of the service data. ### Claim 3 (depends on 1) The transmitter of claim 1, wherein a size of a field for the PSI/SI reprocessing information is one bit. ### Claim 4 (depends on 1) The transmitter of claim 1, further comprising: a frame builder configured to build a frame, the frame including preamble symbols according to the mapped constellation values of the Layer 1 signaling data and at least one data slice having time interleaved service data, wherein a Layer 1 block having the Layer 1 signaling data is repeated in one preamble symbol by a frequency domain. ### Claim 5 (depends on 4) The transmitter of claim 4, further comprising: a modulator configured to modulate the broadcasting data having the built frame by an Orthogonal Frequency Division Multiplexing (OFDM) scheme. ### Claim 6 A receiver for processing broadcasting data, the receiver comprising: a first processor configured to process service data; and a second processor configured to process Layer 1 signaling data for signaling the service data, wherein the first processor comprises: a first QAM demapper configured to demap constellation values of the service data into cell words; a first multiplexer configured to multiplex the demapped cell words into the service data; a first bit deinterleaver configured to bit deinterleave the multiplexed service data; a first low-density parity-check (LDPC) decoder configured to LDPC decode the bit-deinterleaved service data; and a first BCH decoder configured to BCH decode the LDPC-decoded service data; wherein the second processor comprises: a second QAM demapper configured to demap constellation values corresponding to the Layer 1 signaling data into cell words. a second multiplexer configured to multiplex the demapped cell words into the Layer 1 signaling data; a second bit deinterleaver configured to bit deinterleave the multiplexed Layer 1 signaling data and at least one LDPC parity bit; a second de-puncturing element configured to perform de-puncturing on the at least one LDPC parity bit; a second LDPC decoder configured to LDPC decode the Layer 1 signaling data and the de-punctured at least one LDPC parity bit; and a second BCH decoder configured to BCH decode the LDPC-decoded Layer 1 signaling data and the de-punctured at least one LDPC parity bit, wherein the Layer 1 signaling data have Program Specific Information (PSI) and Service Information (SI) reprocessing information for each physical path carrying the service data, the PSI/SI reprocessing information indicating whether a PSI/SI reprocessing has been performed. ### Claim 7 (depends on 6) The receiver of claim 6, wherein the first processor further comprises: a time deinterleaver configured to time deinterleave the constellation values corresponding to the service data. ### Claim 8 (depends on 6) The receiver of claim 6, wherein a size of a field for the PSI/SI reprocessing information is one bit. ### Claim 9 (depends on 6) The receiver of claim 6, further comprising: a demodulator configured to demodulate the broadcasting data by an Orthogonal Frequency Division Multiplexing (OFDM) scheme. ### Claim 10 (depends on 9) The receiver of claim 9, further comprising: a frame parser configured to parse a frame from the demodulated broadcasting data, wherein the frame includes preamble symbols including the Layer 1 signaling data and at least one data slice having the service data, wherein a Layer 1 block having the Layer 1 signaling data is repeated in one preamble symbol by a frequency domain. ### Claim 11 A method of transmitting broadcasting data to a receiver, the method comprising: first processing Layer 1 signaling data for signaling service data; and second processing the service data, wherein the first processing comprises: BCH encoding the Layer 1 signaling data; low-density parity-check (LDPC) encoding the BCH-encoded Layer 1 signaling data to generate at least one LDPC parity bit; performing puncturing on the generated at least one LDPC parity bit; bit interleaving the LDPC-encoded Layer 1 signaling data and the punctured at least one LDPC parity bit; and demultiplexing the bit-interleaved Layer 1 signaling data into cell words; and mapping the cell words into constellation values by means of a QAM mapping method, wherein the second processing comprises: BCH encoding the service data to generate an error protected data; LDPC encoding the BCH-encoded service data; bit interleaving the LDPC-encoded service data; demultiplexing the bit-interleaved service data into cell words; and mapping the cell words into constellation values of the service data, wherein the Layer 1 signaling data have Program Specific Information (PSI) and Service Information (SI) reprocessing information for each physical path carrying the service data, the PSI/SI reprocessing information indicating whether a PSI/SI reprocessing has been performed. ### Claim 12 (depends on 11) The method of claim 11, wherein the second processing further comprises: time interleaving the mapped constellation values of the service data. ### Claim 13 (depends on 11) The method of claim 11, wherein a size of a field for the PSI/SI reprocessing information is one bit. ### Claim 14 (depends on 11) The method of claim 11, further comprising: building a frame including preamble symbols according to the mapped constellation values of the Layer 1 signaling data and the at least one data slice having the time interleaved PLP data, wherein a Layer 1 block having the Layer 1 signaling data is repeated in one preamble symbol by a frequency domain. ### Claim 15 (depends on 14) The method of claim 14, further comprising: modulating the broadcasting data having the built frame by an Orthogonal Frequency Division Multiplexing (OFDM) scheme. ### Claim 16 A method of receiving broadcasting data, the method comprising: first processing service data; and second processing Layer 1 signaling data for signaling the service data, wherein the first processing comprises: demapping constellation values of the service data into cell words; multiplexing the demapped cell words into the service data; bit deinterleaving the multiplexed service data; LDPC decoding the bit-deinterleaved service data; and BCH decoding the LDPC-decoded service data, wherein the second processing comprises: demapping constellation values corresponding to the Layer 1 signaling data into cell words; multiplexing the demapped cell words into the Layer 1 signaling data; bit deinterleaving the multiplexed Layer 1 signaling data and at least one LDPC parity bit; performing de-puncturing on the at least one LDPC parity bit; low-density parity-check (LDPC) decoding the Layer 1 signaling data and the de-punctured at least one LDPC parity bit; and BCH decoding the LDPC-decoded Layer 1 signaling data and the de-punctured at least one LDPC parity bit, wherein the Layer 1 signaling data include Program Specific Information (PSI) and Service Information (SI) reprocessing information for each physical path carrying the service data, the PSI/SI reprocessing information indicating whether a PSI/SI reprocessing has been performed. ### Claim 17 (depends on 16) The method of claim 16, wherein the first processing further comprises: time deinterleaving constellation values corresponding to the service data. ### Claim 18 (depends on 16) The method of claim 16, wherein a size of a field for the PSI/SI reprocessing information is one bit. ### Claim 19 (depends on 16) The method of claim 16, further comprising: demodulating the broadcasting data by an Orthogonal Frequency Division Multiplexing (OFDM) scheme. ### Claim 20 (depends on 19) The method of claim 19, further comprising: parsing a frame from the demodulated broadcasting data, wherein the frame includes preamble symbols including the Layer 1 signaling data and at least one data slice having the service data, wherein a Layer 1 block having the Layer 1 signaling data is repeated in one preamble symbol by a frequency domain.