# US 9,882,731 B2 · Broadcasting signal transmitter/receiver and broadcasting signal transmission/reception method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,731 B2 - Document ID: US9882731B2 - Status: Granted - Kind: B2 - Application number: 14/200,648 - Filed: 2014-03-07 - Published: 2014-09-04 - Granted: 2018-01-30 - Earliest claimed: 2010-02-12 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Woosuk Ko; Sangchul Moon; Jeonghwan Park; Hotaek Hong - Web page: https://patentgrep.com/patent/US9882731B2 ## CPC - H04L 27/2602: {Signal structure} - H04H 20/42: Arrangements for resource management - H04H 60/73: using meta-information - H04L 1/0041: {Arrangements at the transmitter end} - H04L 1/0045: {Arrangements at the receiver end} - H04L 5/0023: {Time-frequency-space} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 12/18: for broadcast or conference {, e.g. multicast} - H04N 21/234327: {by decomposing into layers, e.g. base layer and one or more enhancement layers} - H04N 21/235: Processing of additional data, e.g. scrambling of additional data or processing content descriptors - H04N 21/2383: Channel coding {or modulation} of digital bit-stream, e.g. QPSK modulation (arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002) - H04N 21/426: Internal components of the client {; Characteristics thereof} (H04N5/44 takes precedence) - H04N 21/435: Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream - H04N 21/4382: {Demodulation or channel decoding, e.g. QPSK demodulation (analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002)} - H04N 21/6131: {involving transmission via a mobile phone network (wireless downlink channel access H04W74/006)} - H04L 27/2626: {Arrangements specific to the transmitter only} - H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)} - H04N 21/2365: Multiplexing of several video streams - H04N 21/4345: {Extraction or processing of SI, e.g. extracting service information from an MPEG stream} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A broadcasting signal reception method according to the present invention comprises the following steps: OFDM-demodulating by receiving a plurality of broadcasting signals, which contain a transmission frame for transmitting a broadcasting service; outputting the transmission frame by decoding a plurality of OFDM-demodulated broadcasting signals with at least one method among MIMO, MISO, and SISO; and selectively decoding a plurality of PLP's, which are included in the transmission frame, using signaling information included in the transmission frame. In particular, PSI/SI such as PAT/PMT can be transmitted through an arbitrary PLP among the plurality of PLP's; and in the transmitter, an arbitrary PLP, which transmits the PAT/PMP, can be decoded first to enable a search of all PLP's that transmit components included in a single broadcasting service, and a plurality of PLP's can be decoded selectively. ## Claims ### Claim 1 A method for transmitting broadcast signals by a transmitter, wherein the method comprising: input processing input streams to generate data of PLP (Physical Layer Pipe)s carrying at least one service or service components; LDPC (Low Density Parity Check) encoding on the data by an LDPC scheme; mapping the LDPC encoded data onto constellations based on a symbol mapping type; MIMO (Multiple-Input Multiple-Output) processing the mapped data based on a MIMO matrix with a parameter, wherein the parameter depends on the symbol mapping type; time interleaving the MIMO processed data; building at least one signal frame, wherein each signal frame comprises a preamble including signaling information for the PLPs and data symbols including the time interleaved data; modulating data in the built at least one signal frame by using an OFDM (Orthogonal Frequency Divisional Multiplexing Scheme); and transmitting the broadcast signals including the modulated data, wherein the least one signal frame includes first layer information which includes identifiers of the PLPs including a first PLP, wherein the least one signal frame includes a second PLP that carries second layer information and the first PLP carries information for mapping between a PLP and components of a service which is described in the second layer information, wherein the information for mapping includes PLP identification information, wherein the first PLP is different from the second PLP, and wherein the least one signal frame includes information for identifying whether the first PLP carries a service signaling table describing the service. ### Claim 2 (depends on 1) The method of claim 1, wherein the components of the service are carried over an IP stream with an IP address. ### Claim 3 (depends on 1) The method of claim 1, the method further includes: inserting a first symbol and a second symbol at the beginning of the signal frame. ### Claim 4 (depends on 3) The method of claim 3, wherein the first symbol includes a suffix in a time domain which is obtained from a part of the first symbol based on a frequency shifting method and wherein the second symbol includes a prefix in the time domain which is obtained from a part of the second symbol based on a frequency shifting method. ### Claim 5 (depends on 1) The method of claim 1, wherein the method further includes: frequency interleaving data in the built at least one signal frame. ### Claim 6 An apparatus for transmitting broadcast signals, wherein the apparatus comprising: an input processor to input process input streams to generate data of PLP (Physical Layer Pipe)s carrying at least one service or service components; an LDPC (Low Density Parity Check) encoder to encode on the data by an LDPC scheme; a mapper to map the LDPC encoded data onto constellations based on a symbol mapping type; a MIMO (Multiple-Input Multiple-Output) processor to process the mapped data based on a MIMO matrix with a parameter, wherein the parameter depends on the symbol mapping type; a time interleaver to time interleave the MIMO processed data; a frame builder to build at least one signal frame, wherein each signal frame comprises a preamble including signaling information for PLPs and data symbols including the time interleaved data; a modulator to modulate data in the built at least one signal frame by using an OFDM (Orthogonal Frequency Divisional Multiplexing Scheme); and a transmitter to transmit the broadcast signals including the modulated data, wherein the least one signal frame includes first layer information which includes identifiers of the PLPs including a first PLP, wherein the least one signal frame includes a second PLP that carries second layer information and the first PLP carries information for mapping between a PLP and components of a service which is described in the second layer information, wherein the information for mapping includes PLP identification information, wherein the first PLP is different from the second PLP, and wherein the least one signal frame includes information for identifying whether the first PLP carries a service signaling table describing the service. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the components of the service are carried over an IP stream with an IP address. ### Claim 8 (depends on 6) The apparatus of claim 6, the apparatus further includes: an inserter to insert a first symbol and a second symbol at the beginning of the signal frame. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the first symbol includes a suffix in a time domain which is obtained from a part of the first symbol based on a frequency shifting method and wherein the second symbol includes a prefix in the time domain which is obtained from a part of the second symbol based on a frequency shifting method. ### Claim 10 (depends on 6) The apparatus of claim 6, wherein the apparatus further includes: a frequency interleaver to frequency interleave data in the built at least one signal frame. ### Claim 11 A method for receiving broadcast signals by a receiver, wherein the method comprising: receiving the broadcast signals; demodulating the received broadcast signals by using an OFDM (Orthogonal Frequency Divisional Multiplexing Scheme); parsing at least one signal frame from the demodulated broadcast signals, wherein the least one signal frame includes first layer information which includes identifiers of Physical Layer Pipes (PLPs) including a first PLP, wherein the least one signal frame includes a second PLP that carries second layer information and the first PLP carries information for mapping between a PLP and components of a service which is described in the second layer information, wherein the information for mapping includes PLP identification information, wherein each signal frame comprises a preamble including signaling information for the PLPs and data symbols including data of the PLPs carrying at least one service or service components, wherein the first PLP is different from the second PLP, and wherein the least one signal frame includes information for identifying whether the first PLP carries a service signaling table describing the service; time de-interleaving the data in the data symbols; MIMO (Multiple-Input Multiple-Output) processing the time de-interleaved data based on a MIMO matrix with a parameter, wherein the parameter depends on a symbol mapping type; de-mapping the MIMO processed data based on the symbol mapping type; LDPC (Low Density Parity Check) decoding on the de-mapped data by an LDPC scheme; and output processing LDPC decoded data. ### Claim 12 (depends on 11) The method of claim 11, the method further includes: detecting a first symbol and at least one second symbol which are located at the beginning of the signal frame. ### Claim 13 (depends on 12) The method of claim 12, wherein the first symbol includes a suffix in a time domain which is obtained from a part of the first symbol based on a frequency shifting method and wherein the second symbol includes a prefix in the time domain which is obtained from a part of the second symbol based on a frequency shifting method. ### Claim 14 (depends on 11) The method of claim 11, wherein the method further includes; frequency de-interleaving the demodulated broadcast signals. ### Claim 15 An apparatus for receiving broadcast signals, wherein the apparatus comprising: a receiver to receive the broadcast signals; a demodulator to demodulate the received broadcast signals by using an OFDM (Orthogonal Frequency Divisional Multiplexing Scheme); a frame parser to parse at least one signal frame from the demodulated broadcast signals, wherein the least one signal frame includes first layer information which includes identifiers of Physical Layer Pipes (PLPs) including a first PLP, wherein the least one signal frame includes a second PLP that carries second layer information and the first PLP carries information for mapping between a PLP and components of a service which is described in the second layer information, wherein the information for mapping includes PLP identification information, wherein a signal frame comprises a preamble including signaling information for the PLPs and data symbols including data of the PLPs carrying at least one service or service components, wherein the first PLP is different from the second PLP, and wherein the least one signal frame includes information for identifying whether the first PLP carries a service signaling table describing the service; a time de-interleaver to time de-interleave the data in the data symbols; a MIMO (Multiple-Input Multiple-Output) processor to MIMO process the time de-interleaved data based on a MIMO matrix with a parameter, wherein the parameter depends on a symbol mapping type; a de-mapper to de-map the MIMO processed data based on the symbol mapping type; an LDPC (Low Density Parity Check) decoder to decode on the de-mapped data by an LDPC scheme; and an output processor to output process LDPC decoded data. ### Claim 16 (depends on 15) The apparatus of claim 15, the apparatus further includes: a detector to detect a first symbol and a second symbol which are located at the beginning of the signal frame. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the first symbol includes a suffix in a time domain which is obtained from a part of the first symbol based on a frequency shifting method and wherein the second symbol includes a prefix in the time domain which is obtained from a part of the second symbol based on a frequency shifting method. ### Claim 18 (depends on 15) The apparatus of claim 15, wherein the apparatus further includes; a frequency de-interleaver to frequency de-interleave the demodulated broadcast signals.