WO2018008428A1 - 受信装置、送信装置、及び、データ処理方法 - Google Patents
受信装置、送信装置、及び、データ処理方法 Download PDFInfo
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- WO2018008428A1 WO2018008428A1 PCT/JP2017/023148 JP2017023148W WO2018008428A1 WO 2018008428 A1 WO2018008428 A1 WO 2018008428A1 JP 2017023148 W JP2017023148 W JP 2017023148W WO 2018008428 A1 WO2018008428 A1 WO 2018008428A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/68—Systems specially adapted for using specific information, e.g. geographical or meteorological information
- H04H60/73—Systems specially adapted for using specific information, e.g. geographical or meteorological information using meta-information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
- H04H20/31—Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/93—Arrangements characterised by the broadcast information itself which locates resources of other pieces of information, e.g. URL [Uniform Resource Locator]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
Definitions
- the present technology relates to a receiving device, a transmitting device, and a data processing method, and more particularly, to a receiving device, a transmitting device, and a data processing method capable of more flexibly performing digital television broadcast operation.
- TMCC Transmission Multiplexing Configuration Control
- the present technology has been made in view of such circumstances, and enables more flexible operation of digital television broadcasting.
- a receiver includes a receiver configured to receive a broadcast signal transmitted by frequency division multiplexing (FDM), and a first control information that is obtained from the broadcast signal and is control information of a physical layer.
- the second information transmitted in each layer based on control information presence information which is information included in control information and which indicates presence / absence of second control information which is control information of a layer higher than the physical layer.
- a processing unit configured to process the control information of 2.
- the receiving device may be an independent device or an internal block that constitutes one device.
- a data processing method is a data processing method corresponding to the receiving device according to the first aspect of the present technology described above.
- a control signal of a physical layer is received from a broadcast signal received by frequency division multiplexing (FDM) and obtained from the broadcast signal.
- Transmission is performed layer by layer based on control information presence information that is information included in certain first control information and that indicates presence / absence of second control information that is control information of a layer higher than the physical layer
- the second control information to be processed is processed.
- the transmission device is the first control information that is control information of a physical layer, and the presence or absence of second control information that is control information of a layer higher than the physical layer. And a broadcast signal including the first control information and the second control information by frequency division multiplexing (FDM) and a generation unit generating the first control information including control information presence information indicating And a transmitting unit.
- FDM frequency division multiplexing
- the transmission device of the second aspect of the present technology may be an independent device or an internal block that constitutes one device. Further, a data processing method according to a second aspect of the present technology is a data processing method corresponding to the transmission device according to the second aspect of the present technology described above.
- the second control information is a first control information that is control information of a physical layer, and is a control information of a layer higher than the physical layer.
- the first control information including control information presence information indicating presence or absence of control information is generated, and the first control information and the second control information are included by frequency division multiplexing (FDM).
- FDM frequency division multiplexing
- FIG. 1 is a diagram illustrating a configuration of an embodiment of a transmission system to which the present technology is applied. It is a figure which shows the structural example of a transmitter. It is a figure which shows the structural example of a receiver. It is a figure showing an example of a hierarchy of this art. It is a figure which shows the structure of the frame of the present physical layer, and arrangement
- FIG. 1 is a diagram showing the configuration of an embodiment of a transmission system to which the present technology is applied.
- a system is a system in which a plurality of devices are logically gathered.
- the transmission system 1 includes a transmitting device 10 and a receiving device 20.
- this transmission system 1 data transmission conforming to a predetermined broadcast system is performed.
- the transmission device 10 is a transmitter corresponding to a predetermined broadcast system, and transmits content via the transmission path 30.
- the transmission device 10 transmits a broadcast stream including video and audio of contents such as a broadcast program, data of subtitles, and control information as a broadcast wave through the transmission path 30.
- the receiving device 20 is a receiver compatible with a predetermined broadcast system, and receives and outputs content transmitted from the transmitting device 10 via the transmission path 30.
- the receiving device 20 receives a broadcast wave from the transmitting device 10, and processes video, audio, subtitle data and control information included in the broadcast stream to process video or audio of content such as a broadcast program. To play.
- the transmission path 30 may be, for example, satellite broadcasting using a broadcasting satellite (BS: Broadcasting Satellite) or a communication satellite (CS: Communications Satellite) or a cable in addition to terrestrial waves (terrestrial broadcasting). May be cable broadcasting (CATV) or the like.
- BS Broadcasting Satellite
- CS Communications Satellite
- CATV cable broadcasting
- FIG. 2 is a diagram showing a configuration example of the transmission device 10 of FIG.
- the transmission apparatus 10 includes a packet processing unit 111, a control information generation unit 112, a frame generation unit 113, and a modulation unit 114.
- the packet processing unit 111 processes a packet storing data such as video, audio, and subtitles of content, and supplies the processed packet to the frame generation unit 113.
- the packet processing unit 111 can include upper layer control information, time information, and the like in the packet.
- the upper layer means a layer higher than the physical layer in the terrestrial digital television broadcast protocol stack.
- the control information generation unit 112 generates control information of a physical layer for performing demodulation processing, decoding processing and the like on the reception side, and supplies the control information to the frame generation unit 113.
- the frame generation unit 113 processes the packet supplied from the packet processing unit 111 and the control information supplied from the control information generation unit 112 to obtain a physical layer frame (physical layer frame) conforming to a predetermined broadcast system. Is generated and supplied to the modulation unit 114.
- the modulation unit 114 performs necessary processing (modulation processing) on the physical layer frame supplied from the frame generation unit 113, and transmits the broadcast signal obtained thereby via the antenna 121.
- the transmitter 10 is configured as described above. In FIG. 2, for convenience of explanation, although the transmitter 10 is described as if it were configured as one device, the transmitter 10 on the transmission side has each function of the block in FIG. It can be a system composed of a plurality of devices.
- FIG. 3 is a diagram showing a configuration example of the receiving device 20 of FIG.
- the receiving apparatus 20 includes an RF unit 211, a demodulation unit 212, and a processing unit 213.
- the RF unit 211 includes, for example, a tuner.
- the RF unit 211 performs necessary processing on the broadcast signal received via the antenna 221, and supplies a signal obtained thereby to the demodulation unit 212.
- the demodulation unit 212 includes, for example, a demodulation LSI (Large Scale Integration) or the like.
- the demodulation unit 212 demodulates the signal supplied from the RF unit 211.
- a physical layer frame is processed according to control information of the physical layer to obtain a packet.
- the packet obtained by the demodulation process is supplied to the processing unit 213.
- the processing unit 213 is configured of, for example, a main SoC (System On Chip) or the like.
- the processing unit 213 performs predetermined processing on the packets supplied from the demodulation unit 212.
- a tuning process or the like is performed based on control information of the upper layer included in the packet.
- Data such as video, audio, and subtitles obtained by the processing by the processing unit 213 is subjected to decoding processing and the like in a circuit at a later stage, and the resulting video and audio are output.
- content such as a broadcast program is reproduced, and its video and audio are output.
- the receiving device 20 is configured as described above.
- the receiving device 20 is configured as, for example, a fixed receiver such as a television receiver or a set top box (STB), or a mobile receiver equipped with a tuner such as a mobile phone or a smartphone.
- the receiving device 20 may be an on-vehicle device mounted on a vehicle.
- ISDB-T is adopted as a broadcasting method of digital terrestrial television broadcasting (see, for example, the above non-patent document 1).
- FDM frequency division multiplexing
- a predetermined frequency band for example, 6 MHz
- a predetermined frequency band for example, 6 MHz
- hierarchical transmission using a band for each one or a plurality of segments is performed.
- data of different services can be transmitted, for example, in each hierarchy made of frequency bands of one or more segments obtained by frequency division.
- each hierarchy is a unit that combines one or more segments.
- an OFDM segment is used.
- OFDM Orthogonal Frequency Division Multiplexing
- subcarriers orthogonal subcarriers
- TMCC Transmission Multiplexing Configuration Control
- the TMCC information is transmission control information for performing demodulation processing, decoding processing, and the like in the reception apparatus 20 in hierarchical transmission in which a plurality of transmission parameters (modulation parameters) are mixed.
- TLV Type Length Value
- MMT MPEG Media Transport
- a method using MMT as such a transport protocol of the IP method is also referred to as a TLV / MMT method.
- control information SI: Signaling Information
- TLV-SI and MMT-SI are defined as control information of a layer higher than the physical layer.
- TLV-SI is control information related to a TLV multiplexing scheme for multiplexing IP packets.
- the TLV-SI includes, for example, a TLV-NIT (Network Information Table) and an AMT (Address Map Table).
- TLV-NIT is information for associating information of a transmission path such as a modulation frequency with a broadcast program in transmission by a TLV packet.
- the AMT is information for associating a service identifier for identifying a broadcast program number with an IP packet.
- MMT-SI is control information related to MMT, which is a media transport method.
- the MMT-SI includes information indicating the configuration of a broadcast program.
- Non-Patent Document 2 ARIB STD-B60 1.6 Edition The Japan Radio Industry Association
- next-generation terrestrial digital television broadcasting system it is considered to extend and upgrade the current terrestrial digital television broadcasting system, but with the expansion, it is more flexible.
- the present technology makes it possible to operate digital television broadcasting more flexibly in order to meet such a request.
- FIG. 4 is a diagram for explaining an example of the hierarchy of the present technology.
- a predetermined frequency band for example, 6 MHz
- the frequency is divided into 35 segments.
- one segment at the center in the figure is segment # 0
- the left and right segments thereof are segments # 1 and # 2
- the left and right segments are segment # 3
- the leftmost segment in the figure becomes segment # 33
- the rightmost segment in the figure becomes segment # 34.
- a hierarchy is configured by combining one or more segments.
- a hierarchy 1 is configured by three segments # 0 to # 2.
- a hierarchy 2 is configured by four segments of segments # 3 and # 5 and segments # 4 and # 6.
- the description of the segments # 8 to # 29 is omitted, but a plurality of 24 segments of the segments # 7 to # 30 constitute a hierarchy 3, and the two segments of the segment # 31 and the segment # 32 form Layer 4 is configured.
- a hierarchy 5 is formed by two segments of segment # 33 and segment # 34.
- a hierarchy is configured from one or more segments obtained by frequency division, and data of different services can be transmitted, for example, for each hierarchy.
- This enables, for example, an operation in which a certain broadcast station uses a plurality of segments.
- the number of layers that can be transmitted is divided into 13 segments and the number of layers that can be transmitted is up to three.
- the number of segments that can be transmitted and the number of layers increase. As it is possible to handle more layers, more diverse services can be provided.
- FIG. 5 is a diagram showing the current physical layer frame structure and the arrangement of control information (signaling).
- FIG. 5 shows the configuration of the segments when the horizontal direction is a carrier number according to the frequency direction, and the vertical direction is a symbol number according to the time direction.
- the symbol number in the vertical direction is the OFDM symbol number.
- the transmission parameters are different depending on the mode. For example, when mode 3 is adopted, the number of symbols per frame is 204 and the carrier numbers are 0 to 431.
- the current physical layer frame contains TMCC information and AC (Auxiliary Channel) information.
- the TMCC information includes, for each layer, information for performing demodulation processing, decoding processing, and the like.
- TMCC information is information of fixed length. Also, parity is added to the TMCC information.
- the AC information is additional information on broadcasting, and includes, for example, additional information on transmission control or earthquake motion warning information.
- AC information is information of fixed length. Also, parity is added to the AC information.
- FIG. 6 is a diagram illustrating an example of a structure of a physical layer frame and an arrangement of control information (signaling) according to the present technology.
- FIG. 6 shows the configuration of the segments when the carrier numbers correspond to the frequency direction in the horizontal direction, and the symbol numbers correspond to the time direction in the vertical direction.
- the physical layer frame of the present technology includes TMCC information and AC information.
- TMCC information of the present technology is referred to as “the present technology TMCC information” in order to distinguish it from current TMCC information.
- the present technology AC information in order to distinguish the AC information of the present technology from the current AC information.
- the TMCC information of the present technology includes, for each layer, information for performing demodulation processing and decoding processing, and information indicating presence / absence of control information in a layer higher than the physical layer (hereinafter referred to as control information presence information) including.
- This control information presence information enables the physical layer to recognize the presence or absence of control information (for example, TLV-SI) in the upper layer, so that it is possible to easily perform, for example, a channel selection process at the time of channel selection. .
- the present technology TMCC information is variable-length information. Therefore, in the present technology, the TMCC information of the present technology can be acquired by defining TMCC length information of a fixed length and defining the length of the TMCC information of the present technology as a variable length. Thereby, this technology TMCC information can be handled as variable-length extensible information.
- Parity is added to the present technology TMCC information and TMCC length information. Also, in the physical layer frame, when combining the TMCC information according to the present technology and the length of data including TMCC length information, padding is performed or other data is inserted. , Can respond.
- TMCC information The detailed contents of the present technology TMCC information will be described later with reference to FIGS. 7 to 12. Moreover, the detailed content of TMCC length information is later mentioned with reference to FIG.
- the present technology AC information is additional information related to broadcasting, and includes, for example, additional information related to transmission control or earthquake motion warning information. Further, the present technology AC information is variable-length information. Therefore, in the present technology, the AC length information of the fixed length is defined, and the length of the AC information of the present technology which is a variable length is defined, so that the AC information of the present technology can be acquired. Thus, the present technology AC information can be handled as variable-length extensible information.
- Parity is added to the present technology AC information and AC length information. Moreover, in the physical layer frame, when combining the length of data including this technology AC information and AC length information, padding is performed or other data is inserted. , Can respond.
- the present TMCC information and the present AC information are not information of fixed length but information of variable length. Therefore, since it can be handled as variable-length extensible information, for example, control information presence information etc. can be easily added to the present technology TMCC information. As a result, digital television broadcasting can be operated more flexibly. Further, since the present technology TMCC information and the present technology AC information have variable lengths, when the length is short, it is possible to shorten the time until acquisition.
- FIG. 7 is a diagram showing an example of a syntax of the present technology TMCC information shown in FIG.
- the modulation parameters of each layer will be described with reference to FIGS. 8 to 12 as appropriate.
- the 13-bit Offset_TLV_packet indicates the offset of the TLV packet from the beginning of the physical layer frame. This offset is in bytes. Although details will be described later with reference to FIG. 17, when the boundary of the physical layer frame and the boundary of the TLV packet do not match, an offset value corresponding to the amount of deviation can be set here. .
- the 6-bit NUM_LAYER specifies the number of layers. As the number of layers, for example, up to 64 layers can be set. In the layer loop according to the number of layers specified by this NUM_LAYER, num_segment, layer_fft_size, layer_mod, layer_cod, layer_gi, packet_type and tlv_si_exist_flag for each layer are respectively arranged.
- the 6-bit num_segment specifies the number of segments in the target layer.
- the 2-bit layer_fft_size specifies the FFT size of the target layer.
- this FFT size 8K, 16K, 32K etc. can be designated, for example, as shown in FIG.
- the 3-bit layer_mod specifies the carrier modulation scheme of the target layer.
- This carrier modulation scheme for example, as shown in FIG. 9, QPSK, 16 QAM, 64 QAM-NUC, 256 QAM-NUC, 1024 QAM-NUC, 4096 QAM-NUC, etc. can be specified.
- the 3-bit layer_cod specifies the code rate of error correction of the target layer.
- this code rate for example, as shown in FIG. 10, it is possible to specify 1/2, 2/3, 3/4, 5/6, 7/8 or the like.
- the 3-bit layer_gi specifies the guard interval of the target layer.
- this guard interval for example, as shown in FIG. 11, 1/4, 1/8, 1/16, 1/32, etc. can be designated.
- the 3-bit packet_type indicates the type of data to be transmitted in the target layer.
- this data type for example, as shown in FIG. 12, an MPEG2-TS system or a TLV / MMT system is specified.
- the TLV / MMT method when adopted as a broadcasting method of the next generation digital terrestrial television broadcasting, “1” is set as the packet_type.
- the MPEG2-TS method When the MPEG2-TS method is adopted, "0" is set as the packet_type.
- the type of data since it is possible to set the type of data to be transmitted by the packet_type, it becomes possible to transmit various types of data such as the TLV / MMT method and the MPEG2-TS method for each layer.
- TLV / MMT method and the MPEG2-TS method are an example of the format of data to be transmitted, and for example, when data of another format is to be transmitted, bits 2 to 7 of Reserved should be used. Other types of data can be set.
- tlv_si_exist_flag is a flag indicating that the target layer includes control information of the upper layer. That is, this tlv_si_exist_flag corresponds to control information presence information. For example, when “0” is set as tlv_si_exist_flag, it indicates that the target layer does not include upper layer control information. On the other hand, for example, when “1” is set as tlv_si_exist_flag, it indicates that the target layer includes control information of the upper layer.
- TLV-SI for example, TLV-SI (for example, TLV-SI) as control information of the upper layer of the TLV / MMT method in the target layer. NIT, AMT is shown to be included.
- PSI Program Specific Information
- the PSI includes a Program Association Table (PAT), a Network Information Table (NIT), a Conditional Access Table (CAT), and the like.
- a predetermined frequency band for example, 6 MHz
- the existence of upper layer control information for example, TLV-SI
- the control information presence information tlv_si_exist_flag
- processing such as channel selection processing at the time of channel selection.
- an operation in which a plurality of broadcast stations share one frequency band and each broadcast station uses a plurality of layers is also assumed, but it is possible to flexibly correspond to such an operation. Processing such as processing can be easily performed.
- Parity represents parity added to the present technology TMCC information.
- the error detection of the present technology TMCC information is performed by cyclic redundancy check (CRC: Cyclic Redundancy Check) using this parity.
- CRC Cyclic Redundancy Check
- This parity is a parity length specified by LEN_TMCC_Parity (FIG. 13) of TMCC length information described later.
- LEN_TMCC_Parity FOG. 13
- FIG. 13 is a diagram showing an example of syntax of TMCC length information shown in FIG.
- the 16-bit SYNC is a synchronization signal for detecting the beginning of the physical layer frame.
- the demodulation unit 212 of the receiving apparatus 20 can easily determine the head of the physical layer frame by the SYNC word. That is, in order to obtain current TMCC information, it is necessary to receive a signal of a frame length period, and a delay for a long period of a frame has occurred. By using this SYNC word, such a delay can be obtained. It can be suppressed.
- the 8-bit LEN_TMCC specifies the length of TMCC information according to the present technology. This length can correspond to TMCC information of the present technology up to 256 bits. However, when “0” is set as LEN_TMCC, it means that the present technology TMCC information is not included.
- the 8-bit LEN_TMCC_Parity specifies the parity length of the present technology TMCC information.
- the parity length can be up to 256 bits. Note that LEN_TMCC_Parity does not need to be specified if it is specified in advance as a fixed value by the target standard.
- the parity length is not defined as a fixed value in the target standard as information on the length regarding the present technology TMCC information
- the present variable along with the length of the present technology TMCC information of variable length
- the parity length of technical TMCC information is specified.
- the 16-bit Parity represents parity added to TMCC length information.
- the error detection of TMCC length information is performed by cyclic redundancy check (CRC) using this parity. In this error detection, if the data is corrupted, the subject TMCC information of the subject is discarded.
- CRC cyclic redundancy check
- TMCC length information of fixed length As described above, by defining TMCC length information of fixed length and defining length information (LEN_TMCC, LEN_TMCC_Parity) regarding variable-length TMCC information of the present technology, it is included in the physical layer frame. This technology TMCC information can be obtained.
- the structure of the TMCC information of the present technology has been described.
- the structure of control information (signaling) other than the TMCC information of the present technology is the same as the structure of the TMCC information of the present technology described above. Similar effects can be obtained.
- the control information presence information tlv_si_exist_flag
- the AC length information has the same structure as the TMCC length information, and includes the length information on the present technology AC information instead of the length information on the present technology TMCC information.
- FIG. 14 is a diagram showing the relationship between segments and layers.
- FIG. 14 the segment arrangement of the physical layer is shown as A of FIG. 14, and the logical segment arrangement is shown as B of FIG.
- FIG. 14A illustrates the case where a predetermined frequency band is frequency-divided into 35 segments when frequency division multiplexing (FDM) is adopted as the segment arrangement of the physical layer.
- FDM frequency division multiplexing
- FIG. 14B shows a case where a segment for each hierarchy is designated by the present technology TMCC information shown in FIG. 7 as a logical segment arrangement. That is, in the present technology TMCC information in FIG. 7, the number of segments in each layer is specified by the 6-bit num_segment in the layer loop, so the number of segments according to num_segment is specified in the layer order.
- a hierarchy 1 is configured by three segments # 0 to # 2.
- each segment # 3 to # 6 constitutes a hierarchy 2
- 24 of the segment # 7 to # 30 constitutes 4
- the segments constitute a hierarchy 3
- the two segments # 31 to # 32 constitute a hierarchy 4
- the two segments # 33 to # 34 constitute a hierarchy 5.
- each hierarchy is represented by the logical segment arrangement shown in B of FIG. 14 and control information presence information (tlv_si_exist_flag) for each hierarchy.
- control information presence information tlv_si_exist_flag
- layers 1 to 4 include upper layer control information (for example, TLV-SI) while layer 5 Can easily determine that upper layer control information (eg, TLV-SI) is not included.
- FIG. 15 is a diagram showing another example of the syntax of the present technology TMCC information shown in FIG. In FIG. 15, the same fields as those in FIG. 7 described above are repeated, and therefore the description thereof will be appropriately omitted.
- num_segment, layer_fft_size, layer_mod, layer_cod, layer_gi, packet_type, and tlv_si_exist_flag for each layer are arranged in the layer loop according to the number of layers specified by NUM_LAYER.
- the layer_fft_size, layer_mod, layer_cod, layer_gi, packet_type, and tlv_si_exist_flag disposed in the hierarchical loop of FIG. 15 are assumed to be the same as modulation parameters in the hierarchical loop of FIG.
- the num_segment disposed in the hierarchical loop of FIG. 15 is different from the num_segment disposed in the hierarchical loop of FIG. That is, num_segment has its bit number changed from 6 bits to 35 bits, and Mnemonic has been changed from uimsbf to bslbf. This indicates that 35-bit num_segment is treated as a bit string.
- each bit of the bit string of num_segment corresponds to one segment
- 35 bits of num_segment can represent information on 35 segments.
- the segment used by each layer can be specified in segment units. A specific example thereof will be described with reference to FIG.
- FIG. 16 is a diagram showing the relationship between segments and layers.
- segment arrangement of the physical layer is shown as A of FIG. 16 and the logical segment arrangement is shown as B of FIG.
- the segment arrangement of the physical layer of A of FIG. 16 is similar to the segment arrangement of the physical layer of A of FIG.
- FIG. 16B shows a case where a segment for each hierarchy is designated by the present technology TMCC information shown in FIG. 15 as a logical segment arrangement. That is, in the present technology TMCC information in FIG. 15, a segment used by each layer is specified in segment units by a 35-bit bit string by num_segment in the layer loop.
- FIG. 16B since the logical segment arrangement in the case of five hierarchies of hierarchy 1 to hierarchy 5 is shown, segments # 0 to # in the direction from the left side to the right side in the drawing.
- layer 1 is configured by three segments of segments # 0 to # 2 in which bits are set.
- layer 2 is configured by four segments of segments # 3 to # 6 in which bits are set.
- Layer 3 is configured by 24 segments of segments # 7 to # 30 in which bits are set.
- Layer 4 is configured by two segments of segments # 31 to # 32 in which bits are set. Furthermore, in a 35-bit bit string by num_segment of Layer 5, Layer 5 is configured by two segments # 33 to # 34 in which bits are set.
- each hierarchy is represented by the logical segment arrangement shown in B of FIG. 16 and control information presence information (tlv_si_exist_flag) for each hierarchy. Can be specified.
- layers 2 to 5 include upper layer control information (for example, TLV-SI) while layer 1 Can easily determine that upper layer control information (eg, TLV-SI) is not included.
- FIG. 17 shows transmission timings of time information in the case of a plurality of layers.
- time information can be efficiently transmitted by including the time information in the NTP format indicating the time at the beginning of the physical layer frame (Physical Frame).
- NTP Network Time Protocol
- NTP Network Time Protocol
- data to be processed by the transmission device 10 is schematically represented on the upper side
- data to be processed by the reception device 20 is schematically represented on the lower side.
- the horizontal direction represents time
- the direction is a direction from the left side to the right side in the drawing.
- TLV packet is represented by “Data” in the figure. Further, time information is represented by “NTP” in the figure.
- the OFDM symbol is represented by "Symbol" in the figure.
- One physical layer frame is configured by n + 1 OFDM symbols of Symbol # 0 to Symbol # n. That is, this physical layer frame is a unit for transmitting data.
- FDM frequency division multiplexing
- the OFDM symbol is further divided into segments.
- the segment is represented by "Seg" in the figure.
- One OFDM symbol is configured by m + 1 segments of Seg # 0 to Seg # m.
- time information is inserted so as to be at the top of the physical layer frame.
- the time information includes the time at the beginning of the physical layer frame as the information defined by the NTP.
- case 1 of the TLV packet the case where the boundary of the physical layer frame and the boundary of the TLV packet coincide is shown as case 1 of the TLV packet.
- time information is inserted at the beginning (boundary) of the physical layer frame.
- one physical layer frame includes TLV packets for each hierarchy of hierarchy 1 to hierarchy 3.
- time information indicating the time at the beginning of the physical layer frame is inserted for each of the layers 1 to 3. For example, time information is inserted at the head of a plurality of TLV packets (Data # 0 to Data # 3) for layer 1. Also, for example, time information is inserted at the beginning of a plurality of TLV packets (Data # 4 to Data # y) for layer 2, and a plurality of TLV packets (Data # y + 1 to Data # z) for layer 3 Time information is inserted at the beginning of.
- FIG. 17 shows a case where the boundary of the physical layer frame and the boundary of the TLV packet do not match as case 2 of the TLV packet.
- the head (boundary) of the physical layer frame is in the middle of the TLV packet (for example, Data # a). Later, time information is inserted.
- the time information indicating the time at the beginning of the physical layer frame is inserted for each data of layers 1 to 3 (layers of TLV packets). Be done.
- time information indicating the time at the beginning of the physical layer frame is inserted at the beginning of the physical layer frame, but the boundary matches between the physical layer frame and the TLV packet, and the boundary Are not coincident with each other, and when the boundaries do not coincide with each other, the insertion position of the time information is a position deviated from the boundary (a position deviated by the TLV packet in the middle).
- an offset value corresponding to the amount of deviation is included in the present technology TMCC information (FIG. 7 or FIG. 15) as an offset (Offset_TLV_packet) of the TLV packet.
- time information placed at the beginning of data of each layer can be obtained.
- This time information indicates the time at the beginning of the physical layer frame. That is, in the case of multiple layers, time information indicating the time at the beginning of the physical layer frame is inserted at the beginning of the data of each layer, so time information can be obtained for each layer.
- FIG. 17 shows the case where only layer 3 is selected among the three layers of layers 1 to 3 as case A of the TLV packet.
- the insertion position of the time information is a position shifted from the boundary of the physical layer frame.
- the TLV packet offset (Offset_TLV_packet) is included in the TMCC information according to the present technology
- the receiving device 20 indicates the time information inserted at the beginning of the data of Layer 3 while taking this offset into consideration.
- Clock synchronization (clock recovery) can be performed by referring to the start time of the physical layer frame.
- FIG. 17 shows a case where, among case 3 of layers 1 to 3, layers 2 and 3 are selected as case B of the TLV packet.
- time information is inserted at the top of the data of layer 2.
- Clock synchronization clock recovery
- the insertion position of the time information is a position shifted from the boundary of the physical layer frame.
- the TLV packet offset (Offset_TLV_packet) is included in the TMCC information according to the present technology
- the receiving apparatus 20 indicates the time information inserted at the beginning of the data of Layer 2 while taking this offset into consideration.
- Clock synchronization (clock recovery) can be performed with reference to the time at the beginning of the physical layer frame.
- caseA and caseB of the TLV packet described here are only an example, and, for example, even if all the layers of hierarchy 1 to hierarchy 3 are selected, etc., they are similarly inserted for each hierarchy.
- Clock synchronization can be performed by referring to the time of the head of the physical layer frame indicated by the time information.
- the offset of the TLV packet included in the TMCC information of the present technology even when the boundary does not match between the physical layer frame and the TLV packet, as well as when the boundary does not match between the physical layer frame and the TLV packet.
- clock synchronization based on time information such as NTP is realized between the transmitting device 10 and the receiving device 20, and in the receiving device 20, for each time information included in the beginning of the data of the hierarchy, It is possible to process multiple TLV packets.
- steps S101 to S103 is processing on the transmission side which is executed by the transmission device 10 of FIG. 1. Also, the processing of steps S201 to S203 is processing on the receiving side executed by the receiving device 20 of FIG.
- the control information generator 112 generates TMCC information according to the present technology.
- the TMCC information according to the present technology includes, for each layer, control information presence information indicating presence or absence of control information (for example, TLV-SI or the like) in an upper layer, in addition to modulation parameters.
- step S102 the frame generation unit 113 generates a physical layer frame including the present technology TMCC information generated in the process of step S101.
- TMCC length information of a fixed length is arranged for variable-length TMCC information of a variable length.
- step S103 the modulation unit 114 performs necessary processing on the physical layer frame generated in the processing of step S102, and transmits the broadcast signal obtained thereby through the antenna 121.
- step S201 the RF unit 211 receives the broadcast signal transmitted from the transmission device 10 via the antenna 221.
- step S202 the demodulation unit 212 processes a physical layer frame obtained from the broadcast signal received in the process of step S201.
- the present technology TMCC information including control information presence information indicating presence or absence of control information of the upper layer can be obtained.
- TMCC length information of a fixed length is arranged with respect to variable length TMCC information of the variable length.
- the present technology TMCC information can be obtained according to the information (LEN_TMCC, LEN_TMCC_Parity) included in.
- step S203 the demodulation unit 212 performs a predetermined process based on the present technology TMCC information obtained in the process of step S202.
- control information of the upper layer since it is possible to determine whether control information of the upper layer exists for each hierarchy according to the control information presence information included in the TMCC information of the present technology, the hierarchy determined that the control information of the upper layer exists By processing the data in the upper layer, control information (for example, TLV-SI etc.) in the upper layer can be obtained. Then, the processing unit 213 at the subsequent stage can perform channel selection processing and the like based on the control information (for example, TLV-SI etc.) of the upper layer obtained in this manner.
- control information for example, TLV-SI etc.
- control information presence information indicating the presence or absence of upper layer control information in each layer in the present technology TMCC information which is control information (signaling) of the physical layer
- TMCC information which is control information (signaling) of the physical layer
- ISDB Integrated Services Digital Broadcasting
- ATSC Advanced
- DVB Digital Video Broadcasting
- Time Division Multiplexing (TDM) is adopted as a broadcasting signal multiplexing method, not frequency division multiplexing method (FDM). Even when a scheme (TDM) is adopted, the present technology can be applied. Also, the layers described above can be conceptualized as PLP (Physical Layer Pipe). In this case, it can be said that the multiple layers are M-PLP (Multiple-PLP).
- BS Broadcasting Satellite
- CS Communications Satellite
- CATV cable television
- the names of the packets, frames, and control information described above are merely examples, and other names may be used. However, the difference between these names is a formal difference, and the substantive contents of target packets, frames, control information, etc. are not different.
- the TLV packet may be referred to as an ATSC Link-layer Protocol (ALP) packet or a Generic packet.
- ALP ATSC Link-layer Protocol
- frames and packets may be used interchangeably.
- time information defined by NTP is used as the time information
- the present invention is not limited thereto, for example, defined by PTP (Precision Time Protocol) or 3GPP (Third Generation Partnership Project) It is possible to use information of any time such as information of a certain time, information of a time included in GPS (Global Positioning System) information, and other information of a time determined in a uniquely determined format.
- PTP Precision Time Protocol
- 3GPP Third Generation Partnership Project
- time information is described as indicating the time at the beginning of the physical layer frame, but the present invention is not limited to this, and the time information may indicate the time at another position of the stream.
- time information may be included in the preamble.
- the present technology is a predetermined standard that is defined on the assumption that a transmission line other than a broadcast network, ie, a communication line (communication network) such as the Internet or a telephone network, is used as a transmission line.
- a communication line such as the Internet or a telephone network
- the transmission device 10 may be a server provided on the Internet. Then, the communication server and the receiving device 20 perform bi-directional communication via the transmission path 30 (communication line).
- FIG. 19 is a diagram showing an example of a hardware configuration of a computer that executes the series of processes described above according to a program.
- a central processing unit (CPU) 1001, a read only memory (ROM) 1002, and a random access memory (RAM) 1003 are mutually connected by a bus 1004.
- An input / output interface 1005 is further connected to the bus 1004.
- An input unit 1006, an output unit 1007, a recording unit 1008, a communication unit 1009, and a drive 1010 are connected to the input / output interface 1005.
- the input unit 1006 includes a keyboard, a mouse, a microphone and the like.
- the output unit 1007 includes a display, a speaker, and the like.
- the recording unit 1008 includes a hard disk, a non-volatile memory, and the like.
- the communication unit 1009 includes a network interface or the like.
- the drive 1010 drives a removable recording medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
- the CPU 1001 loads the program stored in the ROM 1002 or the recording unit 1008 into the RAM 1003 via the input / output interface 1005 and the bus 1004, and executes the program. A series of processing is performed.
- the program executed by the computer 1000 can be provided by being recorded on, for example, a removable recording medium 1011 as a package medium or the like. Also, the program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be installed in the recording unit 1008 via the input / output interface 1005 by attaching the removable recording medium 1011 to the drive 1010. Also, the program can be received by the communication unit 1009 via a wired or wireless transmission medium and installed in the recording unit 1008. In addition, the program can be installed in advance in the ROM 1002 or the recording unit 1008.
- the processing performed by the computer according to the program does not necessarily have to be performed chronologically in the order described as the flowchart. That is, the processing performed by the computer according to the program includes processing executed in parallel or separately (for example, parallel processing or processing by an object). Further, the program may be processed by one computer (processor) or may be distributed and processed by a plurality of computers.
- the present technology can have the following configurations.
- a processing unit configured to process the second control information transmitted for each hierarchy based on the control information presence information to be indicated.
- the first control information is variable-length information included in a frame of the physical layer.
- the frame of the physical layer includes length information indicating a length of the first control information.
- the receiving device (4), wherein the length information includes a synchronization signal for detecting a head of a frame of the physical layer.
- the hierarchy is composed of one or more segments, The receiving apparatus according to any one of (2) to (5), wherein the first control information includes, for each hierarchy, information indicating the number of segments.
- the hierarchy is composed of one or more segments, The receiving apparatus according to any one of (2) to (5), wherein the first control information includes, for each hierarchy, information that can specify a segment used by each hierarchy in segment units.
- the head of the frame of the physical layer includes time information indicating the time of the head
- the first control information includes an offset according to the amount of deviation when the boundary of the frame of the physical layer and the boundary of the packet included in the frame of the physical layer deviate from each other (2) to (2)
- the receiver according to any one of 7).
- the first control information is control information including modulation parameters for each layer
- the receiving apparatus according to any one of (1) to (8), wherein the second control information is control information of a variable-length packet including an IP (Internet Protocol) packet.
- IP Internet Protocol
- the receiving device Receive broadcast signals transmitted by frequency division multiplexing (FDM), It is information included in first control information which is control information of a physical layer obtained from the broadcast signal, and is present or absent of second control information which is control information of a layer higher than the physical layer. Processing the second control information transmitted for each layer based on the indicated control information presence information.
- the first control information which is control information of a physical layer, includes control information presence information indicating presence or absence of second control information, which is control information of a layer higher than the physical layer.
- a generation unit that generates control information;
- a transmitter comprising: a transmitter configured to transmit a broadcast signal including the first control information and the second control information by frequency division multiplexing (FDM).
- the transmission device according to (11), wherein the first control information includes the control information presence information for each hierarchy.
- the first control information is variable-length information included in a frame of the physical layer.
- the transmitter according to (13), wherein the frame of the physical layer includes length information indicating a length of the first control information.
- the transmission apparatus according to (14), wherein the length information includes a synchronization signal for detecting the beginning of a frame of the physical layer.
- the hierarchy is composed of one or more segments, The transmission apparatus according to any one of (12) to (15), wherein the first control information includes, for each hierarchy, information indicating the number of segments.
- the hierarchy is composed of one or more segments
- the transmission apparatus according to any one of (12) to (15), wherein the first control information includes, for each hierarchy, information that can specify a segment used by each hierarchy in segment units.
- the head of the frame of the physical layer includes time information indicating the time of the head, The first control information includes an offset according to the amount of deviation when the boundary of the frame of the physical layer and the boundary of the packet included in the frame of the physical layer deviate from each other (12)
- the transmitter according to any one of 17).
- the first control information is control information including modulation parameters for each layer
- the transmission apparatus according to any one of (11) to (18), wherein the second control information is control information of a variable-length packet including an IP packet.
- the transmitting device The first control information, which is control information of a physical layer, includes control information presence information indicating presence or absence of second control information, which is control information of a layer higher than the physical layer.
- Generate control information A data processing method comprising: transmitting a broadcast signal including the first control information and the second control information by frequency division multiplexing (FDM).
- FDM frequency division multiplexing
- Reference Signs List 1 transmission system 10 transmitting device, 20 receiving device, 30 transmission path, 111 packet processing unit, 112 control information generating unit, 113 frame generating unit, 114 modulating unit, 211 RF unit, 212 demodulating unit, 213 processing unit, 1000 computer , 1001 CPU
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Abstract
Description
2.本技術の概要
3.本技術の物理層の制御情報
4.本技術TMCC情報対応処理の流れ
5.変形例
6.コンピュータの構成
図1は、本技術を適用した伝送システムの一実施の形態の構成を示す図である。なお、システムとは、複数の装置が論理的に集合したものをいう。
図2は、図1の送信装置10の構成例を示す図である。
図3は、図1の受信装置20の構成例を示す図である。
図4は、本技術の階層の例を説明する図である。
図5は、現行の物理層のフレームの構造と、制御情報(シグナリング)の配置を示す図である。
図6は、本技術の物理層のフレームの構造と、制御情報(シグナリング)の配置の例を示す図である。
図7は、図6に示した本技術TMCC情報のシンタックスの例を示す図である。なお、各階層の変調パラメータについては、図8乃至図12を適宜参照しながら、説明するものとする。
図13は、図6に示したTMCC長さ情報のシンタックスの例を示す図である。
図14は、セグメントと階層との関係を示す図である。
図15は、図6に示した本技術TMCC情報のシンタックスの他の例を示す図である。なお、図15において、上述した図7と同一のフィールドについては、繰り返しになるので、その説明は適宜省略するものとする。
図16は、セグメントと階層との関係を示す図である。
次に、図17を参照して、図7及び図15に示した本技術TMCC情報に含まれる、TLVパケットのオフセット(Offset_TLV_packet)について説明する。図17には、複数階層の場合の時刻情報の送出タイミングを示している。
周波数分割多重化方式(FDM:Frequency Division Multiplexing)で伝送される放送信号を受信する受信部と、
前記放送信号から得られる、物理層の制御情報である第1の制御情報に含まれる情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報に基づいて、階層ごとに伝送される前記第2の制御情報を処理する処理部と
を備える受信装置。
(2)
前記第1の制御情報は、階層ごとに、前記制御情報存在情報を含む
(1)に記載の受信装置。
(3)
前記第1の制御情報は、前記物理層のフレームに含まれる可変長の情報である
(2)に記載の受信装置。
(4)
前記物理層のフレームは、前記第1の制御情報の長さを示す長さ情報を含む
(3)に記載の受信装置。
(5)
前記長さ情報は、前記物理層のフレームの先頭を検出するための同期信号を含む
(4)に記載の受信装置。
(6)
前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、セグメントの個数を示す情報を含む
(2)乃至(5)のいずれかに記載の受信装置。
(7)
前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、各階層が使用するセグメントを、セグメント単位で指定可能な情報を含む
(2)乃至(5)のいずれかに記載の受信装置。
(8)
前記物理層のフレームの先頭には、その先頭の時刻を示す時刻情報を含み、
前記第1の制御情報は、前記物理層のフレームの境界と、前記物理層のフレームに含まれるパケットの境界とがずれている場合に、そのずれ量に応じたオフセットを含む
(2)乃至(7)のいずれかに記載の受信装置。
(9)
前記第1の制御情報は、階層ごとの変調パラメータを含む制御情報であり、
前記第2の制御情報は、IP(Internet Protocol)パケットを含む可変長パケットの制御情報である
(1)乃至(8)のいずれかに記載の受信装置。
(10)
受信装置のデータ処理方法において、
前記受信装置が、
周波数分割多重化方式(FDM)で伝送される放送信号を受信し、
前記放送信号から得られる、物理層の制御情報である第1の制御情報に含まれる情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報に基づいて、階層ごとに伝送される前記第2の制御情報を処理する
ステップを含むデータ処理方法。
(11)
物理層の制御情報である第1の制御情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報を含む前記第1の制御情報を生成する生成部と、
周波数分割多重化方式(FDM)により、前記第1の制御情報と前記第2の制御情報を含む放送信号を送信する送信部と
を備える送信装置。
(12)
前記第1の制御情報は、階層ごとに、前記制御情報存在情報を含む
(11)に記載の送信装置。
(13)
前記第1の制御情報は、前記物理層のフレームに含まれる可変長の情報である
(12)に記載の送信装置。
(14)
前記物理層のフレームは、前記第1の制御情報の長さを示す長さ情報を含む
(13)に記載の送信装置。
(15)
前記長さ情報は、前記物理層のフレームの先頭を検出するための同期信号を含む
(14)に記載の送信装置。
(16)
前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、セグメントの個数を示す情報を含む
(12)乃至(15)のいずれかに記載の送信装置。
(17)
前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、各階層が使用するセグメントを、セグメント単位で指定可能な情報を含む
(12)乃至(15)のいずれかに記載の送信装置。
(18)
前記物理層のフレームの先頭には、その先頭の時刻を示す時刻情報を含み、
前記第1の制御情報は、前記物理層のフレームの境界と、前記物理層のフレームに含まれるパケットの境界とがずれている場合に、そのずれ量に応じたオフセットを含む
(12)乃至(17)のいずれかに記載の送信装置。
(19)
前記第1の制御情報は、階層ごとの変調パラメータを含む制御情報であり、
前記第2の制御情報は、IPパケットを含む可変長パケットの制御情報である
(11)乃至(18)のいずれかに記載の送信装置。
(20)
送信装置のデータ処理方法において、
前記送信装置が、
物理層の制御情報である第1の制御情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報を含む前記第1の制御情報を生成し、
周波数分割多重化方式(FDM)により、前記第1の制御情報と前記第2の制御情報を含む放送信号を送信する
ステップを含むデータ処理方法。
Claims (20)
- 周波数分割多重化方式(FDM:Frequency Division Multiplexing)で伝送される放送信号を受信する受信部と、
前記放送信号から得られる、物理層の制御情報である第1の制御情報に含まれる情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報に基づいて、階層ごとに伝送される前記第2の制御情報を処理する処理部と
を備える受信装置。 - 前記第1の制御情報は、階層ごとに、前記制御情報存在情報を含む
請求項1に記載の受信装置。 - 前記第1の制御情報は、前記物理層のフレームに含まれる可変長の情報である
請求項2に記載の受信装置。 - 前記物理層のフレームは、前記第1の制御情報の長さを示す長さ情報を含む
請求項3に記載の受信装置。 - 前記長さ情報は、前記物理層のフレームの先頭を検出するための同期信号を含む
請求項4に記載の受信装置。 - 前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、セグメントの個数を示す情報を含む
請求項2に記載の受信装置。 - 前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、各階層が使用するセグメントを、セグメント単位で指定可能な情報を含む
請求項2に記載の受信装置。 - 前記物理層のフレームの先頭には、その先頭の時刻を示す時刻情報を含み、
前記第1の制御情報は、前記物理層のフレームの境界と、前記物理層のフレームに含まれるパケットの境界とがずれている場合に、そのずれ量に応じたオフセットを含む
請求項2に記載の受信装置。 - 前記第1の制御情報は、階層ごとの変調パラメータを含む制御情報であり、
前記第2の制御情報は、IP(Internet Protocol)パケットを含む可変長パケットの制御情報である
請求項1に記載の受信装置。 - 受信装置のデータ処理方法において、
前記受信装置が、
周波数分割多重化方式(FDM)で伝送される放送信号を受信し、
前記放送信号から得られる、物理層の制御情報である第1の制御情報に含まれる情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報に基づいて、階層ごとに伝送される前記第2の制御情報を処理する
ステップを含むデータ処理方法。 - 物理層の制御情報である第1の制御情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報を含む前記第1の制御情報を生成する生成部と、
周波数分割多重化方式(FDM)により、前記第1の制御情報と前記第2の制御情報を含む放送信号を送信する送信部と
を備える送信装置。 - 前記第1の制御情報は、階層ごとに、前記制御情報存在情報を含む
請求項11に記載の送信装置。 - 前記第1の制御情報は、前記物理層のフレームに含まれる可変長の情報である
請求項12に記載の送信装置。 - 前記物理層のフレームは、前記第1の制御情報の長さを示す長さ情報を含む
請求項13に記載の送信装置。 - 前記長さ情報は、前記物理層のフレームの先頭を検出するための同期信号を含む
請求項14に記載の送信装置。 - 前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、セグメントの個数を示す情報を含む
請求項12に記載の送信装置。 - 前記階層は、1又は複数のセグメントから構成され、
前記第1の制御情報は、階層ごとに、各階層が使用するセグメントを、セグメント単位で指定可能な情報を含む
請求項12に記載の送信装置。 - 前記物理層のフレームの先頭には、その先頭の時刻を示す時刻情報を含み、
前記第1の制御情報は、前記物理層のフレームの境界と、前記物理層のフレームに含まれるパケットの境界とがずれている場合に、そのずれ量に応じたオフセットを含む
請求項12に記載の送信装置。 - 前記第1の制御情報は、階層ごとの変調パラメータを含む制御情報であり、
前記第2の制御情報は、IPパケットを含む可変長パケットの制御情報である
請求項11に記載の送信装置。 - 送信装置のデータ処理方法において、
前記送信装置が、
物理層の制御情報である第1の制御情報であって、前記物理層よりも上位の層の制御情報である第2の制御情報の存在の有無を示す制御情報存在情報を含む前記第1の制御情報を生成し、
周波数分割多重化方式(FDM)により、前記第1の制御情報と前記第2の制御情報を含む放送信号を送信する
ステップを含むデータ処理方法。
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| CN109478938B (zh) | 2020-10-09 |
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| EP3484071A1 (en) | 2019-05-15 |
| JP7054673B2 (ja) | 2022-04-14 |
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