WO2017122544A1 - データ処理装置、及び、データ処理方法 - Google Patents
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Definitions
- the present technology relates to a data processing device and a data processing method, and more particularly to a data processing device and a data processing method capable of enhancing the expandability of the function of a device on the receiving side.
- ATSC Advanced Television Systems Committee
- IP transmission In ATSC 3.0, a scheme that uses IP / UDP packets, that is, IP (Internet Protocol) packets including UDP (User Datagram Protocol) packets instead of TS (Transport Stream) packets for data transmission (hereinafter referred to as IP transmission) It is decided that the method is adopted. Moreover, it is expected that the IP transmission system will be adopted in the future, even in broadcasting systems other than ATSC 3.0.
- IP Internet Protocol
- UDP User Datagram Protocol
- TS Transport Stream
- the circuit on the previous stage performs restoration processing of the transport stream (TS) on the receiving side, and decoding Between the circuit at the rear stage which performs the process of and so on is realized by a single interface (see, for example, non-patent document 2).
- TS transport stream
- the demodulation device demodulation LSI
- SoC System on Chip
- the present technology has been made in view of such a situation, and is intended to be able to enhance the extensibility of the function of a device on the receiving side.
- the data processing apparatus is the data processing apparatus in the former stage, and the demodulation process among the data obtained by performing a demodulation process on the digital broadcast signal and a reception unit that receives a digital broadcast signal.
- the data processing device may be an independent device or an internal block constituting one device.
- a data processing method according to an aspect of the present technology is a data processing method corresponding to the data processing device according to the aspect of the present technology described above.
- a data processing device and a data processing method of the data obtained by receiving a digital broadcast signal and performing demodulation processing on the digital broadcast signal, processing after the demodulation processing is performed.
- the notification data to be notified to the subsequent data processing apparatus to be performed is processed, and the data can be transmitted together with the received data obtained from the digital broadcast signal, and the notification data together with the received data is the data processing apparatus of the subsequent stage Output to
- the extensibility of the function of the device on the receiving side can be enhanced.
- 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 transmission system. It is a figure which shows the structural example of a receiving system. It is a figure which shows the example of private user data. It is a figure which shows the structure of a physical layer frame. It is a figure which shows the structure of a bootstrap. It is a figure which shows the structure of a bootstrap. It is a figure which shows the structure of a bootstrap. It is a figure which shows the structure of a bootstrap. It is a figure which shows the example of the syntax of L1 basic information (L1-Basic).
- L1 basic information L1-Basic
- FIG. 5 is a diagram for explaining Generic packet external structure methods 1 and 2;
- FIG. 5 is a diagram for explaining a Generic packet external structure method 1;
- FIG. 5 is a diagram for explaining a Generic packet external structure method 1;
- FIG. 5 is a diagram for explaining a Generic packet external structure method 1;
- FIG. 18 is a diagram for explaining a Generic packet external structure method 2.
- FIG. 18 is a diagram for explaining a Generic packet external structure method 2.
- FIG. 18 is a diagram for explaining a Generic packet external structure method 2.
- FIG. 18 is a diagram for explaining a Generic packet external structure method 2.
- 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 transmission system 10 and a reception system 20.
- data transmission conforming to a digital broadcast standard adopting an IP transmission method such as Advanced Television Systems Committee (ATSC) 3.0 or the like is performed.
- ATSC Advanced Television Systems Committee
- the transmission system 10 transmits a broadcast stream including content such as a program or an advertisement via the transmission path 30 as a digital broadcast signal.
- the reception system 20 receives the digital broadcast signal transmitted from the transmission system 10 via the transmission path 30, processes the content included in the broadcast stream, and outputs the content.
- the reception system 20 is configured of a plurality of devices such as a data processing device of the former stage and a data processing device of the latter stage.
- the data processing apparatus in the former stage performs demodulation processing on the digital broadcast signal transmitted from the transmission system 10, and outputs (transmits) data obtained thereby to the data processing apparatus in the latter stage.
- the subsequent stage data processing device performs the subsequent stage processing of the demodulation process on the data output (sent) from the previous stage data processing device.
- the data processing apparatus at the front stage corresponds to a demodulator 211 (FIG. 3), a home gateway 261 (FIG. 34), etc., which will be described later.
- the processing device 212 (FIG. 3), the client device 262 (FIG. 34), etc. correspond to the data processing device of the latter stage.
- the receiving system 20 can be provided with two or more and the transmission system 10 transmits Digital broadcast signals to be distributed can be simultaneously received by the plurality of receiving systems 20 via the transmission line 30.
- a plurality of transmission systems 10 can be provided.
- Each of the plurality of transmission systems 10 transmits a digital broadcast signal including a broadcast stream as a separate channel, for example, in a separate frequency band, and in the reception system 20, among the respective channels of the plurality of transmission systems 10. From which it is possible to select the channel on which the broadcast stream is to be received.
- the transmission path 30 is satellite broadcasting using, for example, a broadcasting satellite (BS: Broadcasting Satellite) or a communication satellite (CS: Communications Satellite) in addition to terrestrial waves (terrestrial broadcasting).
- BS Broadcasting Satellite
- CS Communications Satellite
- CATV cable broadcasting
- FIG. 2 is a diagram showing a configuration example of the transmission system 10 of FIG.
- the transmission system 10 includes a component processing unit 111, a signaling processing unit 112, a packet processing unit 113, a modulation processing unit 114, and an RF unit 115.
- the component processing unit 111 acquires the content input thereto.
- the content for example, a live content (for example, a live broadcast program such as sports relay) sent from a relay location through a transmission path or a communication line, or a recorded content (for example, Pre-recorded programs such as dramas etc. are included.
- the component processing unit 111 processes (for example, encodes) data of video and audio components constituting the content, and supplies data obtained thereby to the packet processing unit 113.
- the signaling processing unit 112 generates and processes signaling, and supplies it to the packet processing unit 113.
- signaling in addition to signaling in the physical layer (hereinafter also referred to as L1 signaling (L1 signaling)), Link Layer Signaling (LLS) signaling and Service Layer Signaling (SLS) transmitted in the upper layer thereof. It is assumed that signaling etc. are defined.
- LLS signaling is signaling acquired prior to SLS signaling, and SLS signaling for each service is acquired according to the information described in LLS signaling.
- L1 signaling L1 basic information (L1-Basic) and L1 detailed information (L1-Detail) are defined.
- LLS signaling for example, metadata such as SLT (Service List Table) is included.
- SLT metadata includes information indicating the configuration of streams and services in the broadcast network, such as information necessary for channel selection of services (channel selection information).
- USD metadata includes information such as where to obtain other metadata.
- the LSID metadata is control information of a Real-Time Object Delivery over Unidirectional Transport (ROUTE) protocol.
- MPD metadata is control information for managing playback of a stream of components.
- the MPD metadata conforms to the MPEG-DASH (Dynamic Adaptive Streaming over HTTP) standard.
- the packet processing unit 113 generates a packet using data of video and audio components supplied from the component processing unit 111 and data of signaling supplied from the signaling processing unit 112.
- IP / UDP packet including a UDP packet
- IP / UDP packets are encapsulated to generate a Generic packet.
- the packet processed by the packet processing unit 113 is supplied to the modulation processing unit 114.
- the modulation processing unit 114 processes the packet supplied from the packet processing unit 113 to generate and process a physical layer frame.
- the physical layer frame is composed of a bootstrap, a preamble, and a payload.
- L1 signaling generated by the signaling processing unit 112 can be included in the preamble.
- the modulation processing unit 114 for example, error correction coding processing (for example, BCH coding, LDPC (Low Density Parity Check) coding, etc.), modulation processing (for example, OFDM (Orthogonal Frequency Division Multiplexing) modulation, etc.), etc. Processing is also performed.
- error correction coding processing for example, BCH coding, LDPC (Low Density Parity Check) coding, etc.
- modulation processing for example, OFDM (Orthogonal Frequency Division Multiplexing) modulation, etc.
- OFDM Orthogonal Frequency Division Multiplexing
- the RF unit 115 converts the signal supplied from the modulation processing unit 114 into an RF (Radio Frequency) signal, and transmits the signal as a digital broadcast signal of the IP transmission scheme via the antenna 121.
- RF Radio Frequency
- the transmission system 10 is configured as described above. In FIG. 2, for convenience of explanation, the transmission system 10 on the transmission side is described as if it were configured as one device, but the transmission system 10 on the transmission side is each of the blocks in FIG. It can be made up of multiple devices having functions.
- FIG. 3 is a diagram showing an example of the configuration of the reception system 20 of FIG.
- the reception system 20 is configured of a demodulation device 211 at a front stage and a processing device 212 at a rear stage. Also, in the demodulation device 211 and the processing device 212, data transmission is performed via a single interface (I / F) 213.
- the demodulation device 211 includes, for example, demodulation devices such as an RF IC and a demodulation LSI, and performs processing related to the physical layer (PHY).
- the demodulator 211 includes an RF unit 221, a demodulator 222, an error processor 223, a private user data processor 224, and an output I / F 225.
- the RF unit 221 receives a digital broadcast signal of the IP transmission method via the antenna 241, converts the frequency of the RF signal into an IF (Intermediate Frequency) signal, and supplies the signal to the demodulation unit 222.
- IF Intermediate Frequency
- the demodulation unit 222 performs demodulation processing (for example, OFDM demodulation and the like) on the signal supplied from the RF unit 221.
- the error processing unit 223 performs error correction decoding processing (for example, LDPC decoding, BCH decoding, and the like) on the signal subjected to the demodulation processing.
- error correction decoding processing for example, LDPC decoding, BCH decoding, and the like
- the demodulation process performed by the demodulation unit 222 and the error correction decoding process performed by the error processing unit 223 are described as separate processes, the error correction decoding process is It can also be considered as part of the demodulation process.
- the frequency conversion process or the like performed by the RF unit 221 may be regarded as part of the demodulation process.
- the demodulation processing is performed by the demodulation unit 222 and the error processing unit 223, whereby the physical layer frame obtained from the signal supplied from the RF unit 221 is processed.
- the physical layer frame is composed of a bootstrap, a preamble, and a payload.
- the preamble includes L1 signaling.
- the data (received data) processed by the RF unit 221 to the error processing unit 223 is supplied to the output I / F 225.
- the output I / F 225 of the former stage demodulator 211 and the input I / F 231 of the latter stage processor 212 are connected via the interface (I / F) 213 and data from the output I / F 225 (Received data) is input to the input I / F 231.
- the RF unit 221, the demodulation unit 222, or the error processing unit 223 supplies the private user data processing unit 224 with notification data to be notified to the processing device 212 of the latter stage, which is obtained by the respective units performing processing.
- notification data for example, channel selection information used at the time of channel selection, information on the state of demodulation processing, information on errors in demodulation processing, or demodulation It includes information on signaling or modulation parameters obtained by processing.
- the private user data processing unit 224 processes notification data supplied from the RF unit 221, the demodulation unit 222, or the error processing unit 223, and generates data (received data) processed by the RF unit 221 to the error processing unit 223. On the other hand, it is inserted as private user data.
- the private user data processing unit 224 processes the notification data to be notified to the processing device 212 in the subsequent stage, and makes the data transmittable together with the reception data obtained by the demodulation processing.
- private user data (notification data) is output from the output I / F 225 and input to the input I / F 231 of the processing device 212 via the interface (I / F) 213. Note that details of a transmission method for transmitting notification data as private user data will be described later with reference to FIGS. 13 to 35.
- the demodulation device 211 is configured as described above.
- the processing device 212 is configured of, for example, a system on chip (SoC), and performs processing for reproducing the content by processing the packet as processing subsequent to the demodulation processing.
- the processing device 212 includes an input I / F 231, a filter processing unit 232, a decoder 233, an output unit 234, and an internal control unit 235.
- the input I / F 231 supplies the data input from the demodulator 211 via the interface (I / F) 213 to the filter processing unit 232.
- This data includes received data obtained by demodulation processing and private user data (notification data).
- the filter processing unit 232 performs filtering processing on data (packets stored therein) supplied from the input I / F 231. By this filtering process, the received data (the packet storing the packet) is supplied to the decoder 233, and the private user data (notification data) (the packet storing the packet) is supplied to the internal control unit 235.
- the data of the video and audio components obtained from the received data are input to the decoder 233, the data of this component is signaling (packets storing the data) For example, it will be extracted based on LLS signal and SLS signaling).
- the decoder 233 decodes the data of the video and audio components supplied from the filter processing unit 232, and supplies the data obtained thereby to the output unit 234.
- the output unit 234 outputs video data of the data supplied from the decoder 233 to a display unit (not shown) and outputs audio data to a speaker (not shown). As a result, in the reception system 20, the video and audio of the content distributed from the transmission system 10 are reproduced.
- the internal control unit 235 is supplied with a packet storing private user data (notification data) from the filter processing unit 232.
- the internal control unit 235 performs processing according to notification data notified (transmitted) as private user data.
- the notification data includes channel selection information used at the time of channel selection, information on the state of demodulation processing, information on errors in demodulation processing, or information on signaling or modulation parameters obtained in demodulation processing. ing.
- the internal control unit 235 controls the operation of each unit of the processing device 212 based on such notification data.
- the processing device 212 is configured as described above.
- notification data to be notified to the processing device 212 in the latter stage is transmitted as private user data from the demodulation device 211 in the former stage.
- the outline of this private user data will be described.
- the notification data is transmitted as private user data.
- the area of private user data is reserved in advance in a table defined by the digital broadcast standard such as ATSC 3.0, etc.
- the demodulation device 211 can notify the processing device 212 of private user data using the reserved area. That is, since the transmitting system 10 on the transmitting side does not use this reserved area, the receiving system 20 on the receiving side can add notification data to this reserved area (area of private user data). .
- FIG. 4 is a diagram showing an example of private user data.
- DATA notification data identified by data ID
- DATA_ID data ID
- the “selection frequency” is assigned to the data ID “0x00”, and when the data ID “0x00” is designated by the demodulator 211, the selection frequency Of data are notified from the demodulator 211 to the processor 212.
- the data ID “0x03” is assigned “Bootstrap_OK” indicating that a bootstrap has been captured in the demodulation process.
- the data ID “0x04” is assigned “Preamble_OK” indicating that a preamble (Preamble) has been captured in the demodulation process.
- Preamble_OK indicating that a preamble (Preamble) has been captured in the demodulation process.
- the data ID "0x05” is assigned “Demod_OK” indicating that the demodulation processing has been correctly performed.
- “Time_Info” which is time information such as PTP (Precision Time Protocol) or UTC (a coordinated universal time) is allocated.
- the data ID “0x07” is assigned “TRL_OK” indicating that the TRL (Time Recovery Loop) circuit of the demodulation unit 222 operates correctly and captures the reception signal.
- the data ID “0x08” is assigned “CRL_OK” indicating that the CRL (Carrier Recovery Loop) circuit of the demodulation unit 222 operates correctly and captures the reception signal.
- the data ID “0x09” is assigned “PHY_OK” indicating that the processing of the physical layer (PHY) has been correctly performed.
- the data ID “0x0a” is assigned “L1_Basic_OK” indicating that L1 basic information (L1-Basic) has been captured in the demodulation process.
- the data ID “0x0b” is assigned “L1_Detail_OK” indicating that L1 detailed information (L1-Detail) has been captured in the demodulation process.
- L1 basic information and L1 detailed information are captured.
- the detailed contents of L1 basic information and L1 detailed information will be described later with reference to FIGS. 9 to 12.
- the data ID “0x0c” is assigned “AGC_OK_Time” which indicates the time until the AGC circuit of the demodulation unit 222 operates properly to capture the received signal.
- the data ID “0x0d” is assigned “Bootstrap_OK_Time” indicating the time until the bootstrap is captured in the demodulation process.
- To the data ID of “0x0d”, “L1_Basic_OK_Time” is assigned, which indicates the time until L1 basic information (L1-Basic) is captured in the demodulation process.
- L1_Detail_OK_Time indicating the time until L1 detailed information (L1-Detail) is captured in the demodulation process is allocated.
- the data ID “0x0f” is assigned “AGC_Level” indicating the level of AGC.
- the data ID “0x10” is assigned “Bootstrap_Max_Correlation” which is information on bootstrap correlation.
- the data ID “0x11” is assigned “Bootstrap_Pack_Ratio” which is information on the bootstrap pack ratio.
- the data ID “0x12” is assigned “Sampling_Frequency_Offset” which is information (unit: ppm) indicating an offset of the sampling frequency.
- the data ID “0x13” is assigned “Carrier_Frequency_Offset” which is information (unit: kHz) indicating an offset of the carrier frequency.
- the data ID “0x14” is assigned “LDPC_Number_iteration” which is information on LDPC decoding.
- a data ID “0x15” is assigned “BCH_Error” indicating an error at the time of BCH decoding.
- the data ID “0x16” is assigned “CRC_Error” indicating an error in error detection by cyclic redundancy check (CRC).
- the data ID "0x17” is assigned “MER” indicating a modulation error ratio (MER).
- a data ID of “0x18” to “0x1b” is assigned “SNR” indicating a signal-to-noise ratio (SNR).
- SNR signal-to-noise ratio
- the data ID “0x18” represents the SNR at a certain moment
- the data ID “0x19” represents the average SNR
- the data IDs "0x1a” and "0x1b” are maximum and minimum. It represents the SNR.
- a data ID of "0x1c” is assigned an “Error Indicator” indicating an indicator of an error.
- "Bit_Error_Rate” indicating a bit error rate (BER: Bit Error Rate) is assigned.
- the data ID “0x1f” is assigned “Emergency_Information” which is information related to emergency information.
- the data ID “0x20” is assigned “Frame_Error_Rate” indicating a frame error rate (FER: Frame Error Rate).
- a "Packet_Error_Rate” indicating a packet error rate (PER) is assigned to the data ID of "0x21".
- the data ID "0x22” is assigned a "maker ID” for identifying a maker, which is recorded in advance in the demodulator 211 (demodulation device).
- the data ID “0x23” is assigned a "maker's version” which is a version for each maker, which is recorded in advance in the demodulator 211 (demodulation device). Note that data IDs “0x24” to “0x3f” are areas for future expansion.
- the data ID “0x40” is assigned “Bootstrap” which is bootstrap data obtained by demodulation processing.
- the data ID “0x60” is assigned “L1_Basic_signaling” which is data of L1 basic information (L1-Basic) obtained by demodulation processing.
- the data ID “0x90” is assigned “L1_Detail_signaling” which is data of L1 detailed information (L1-Detail) obtained by the demodulation process.
- Data IDs “0xd0” to “0xdf” are areas that can be uniquely expanded by a manufacturer that manufactures (the demodulation device 211 or the processing device 212) of the reception system 20. Also, data IDs “0xf0” to “0xff” are areas for future expansion.
- FIG. 4 exemplifies the notification data that can be transmitted as private user data and the identification information thereof, data other than the notification data shown in FIG. 4 may be transmitted as private user data. Good.
- L1 basic information L1-Basic
- L1 detailed information L1-Detail
- FIG. 5 is a diagram showing the structure of the physical layer frame.
- the horizontal direction represents time
- the vertical direction represents frequency
- the physical layer frame is composed of a bootstrap, a preamble, and one or more subframes.
- the physical layer frame is configured with a predetermined frame length such as millisecond. In the physical layer frame, after obtaining the bootstrap and the preamble, it is possible to obtain subsequent subframes.
- the bootstrap corresponds to, for example, a P1 symbol constituting a T2 frame of DVB-T2, and the preamble corresponds to, for example, a P2 symbol constituting a T2 frame of DVB-T2.
- the bootstrap can also be said to be a preamble.
- the preamble may include L1 signaling such as L1 basic information (L1-Basic) and L1 detailed information (L1-Detail).
- L1 basic information L1-Basic
- L1 detailed information L1-Detail
- L1 basic information is composed of about 200 bits
- L1 detailed information is composed of 400 to several thousand bits.
- the L1 basic information is read out earlier than the L1 detailed information.
- L1 basic information is also different in that it is transmitted more robustly than L1 detailed information.
- Payloads are arranged in subframes.
- modulation parameters such as FFT size, guard interval length, and pilot pattern can be changed for each subframe.
- each bootstrap symbol can transmit a signal of up to 11 bits.
- the bootstrap symbol 1 includes 1 bit eas_wake_up, 2 bits system_bandwidth, and 5 bits min_time_to_next.
- the bootstrap symbol 2 includes bsr_coefficient of 7 bits.
- the bootstrap symbol 3 includes 7 bits of preamble_structure.
- FIG. 9 is a diagram showing an example of syntax of L1 basic information (L1-Basic) included in the preamble of FIG.
- the 2-bit L1B_content_tag represents a tag value that identifies content.
- the 3-bit L1B_version represents a version of L1 basic information.
- One bit L1B_slt_flag indicates whether or not SLT (Service Labeling Table) exists.
- One bit L1B_time_info_flag indicates whether time information exists.
- 2-bit L1B_papr represents application of PAPR (Peak to Average Power Reduction).
- L1B_frame_length_mode represents a frame mode.
- the 10-bit L1B_frame_length represents the frame length of the physical layer frame. However, this L1B_frame_length is used only when the frame mode is in the time-aligned mode, and is not used when in the symbol-aligned mode.
- L1B_num_subframes represents the number of subframes included in the physical layer frame.
- the 3-bit L1B_preamble_num_symbols represents the number of OFDM symbols included in the preamble.
- the 3-bit L1B_preamble_reduced_carriers represents the number of control units according to the reduction of the maximum number of carriers of FFT size used in the preamble.
- the 16-bit L1B_L1_Detail_size_bits represents the size of L1 detailed information (L1-Detail).
- the 3-bit L1B_L1_Detail_fec_type represents the FEC type of L1 detailed information.
- the 2-bit L1B_L1_Detail_additional_parity_mode represents an additional parity mode of L1 detailed information.
- the 19-bit L1B_L1_Detail_total_cells represents the total size of L1 detailed information.
- L1B_First_Sub_mimo represents the usage status of MIMO (Multiple Input and Multiple Output) of the first subframe.
- L1B_First_Sub_miso represents the usage status of Multiple Input and Single Output (MISO) of the first subframe.
- the 2-bit L1B_First_Sub_fft_size represents the FFT size of the first subframe.
- the 3-bit L1B_First_Sub_reduced_carriers represents the number of control units according to the decrease in the maximum number of FFT size carriers used in the first subframe.
- the 4-bit L1B_First_Sub_guard_interval represents the guard interval length of the first subframe.
- the 13-bit L1B_First_Sub_excess_samples represents the number of extra samples inserted in the guard interval part in the first subframe. However, this L1B_First_Sub_excess_samples is used only when the frame mode is in the time-aligned mode, and is not used when in the symbol-aligned mode.
- the 11-bit L1B_First_Sub_num_ofdm_symbols represents the number of OFDM symbols included in the first subframe.
- the 5-bit L1B_First_Sub_scattered_pilot_pattern represents an SP pattern (Scattered Pilot Pattern) used in the first subframe.
- the 3-bit L1B_First_Sub_scattered_pilot_boost represents a value for increasing the size of the SP pattern.
- L1B_First_Sub_sbs_first represents the beginning of the Subframe Boundary Symbol (SBS) of the first subframe.
- L1B_First_Sub_sbs_last represents the end of the SBS of the first subframe.
- L1B_Reserved is a region for future expansion (Reserved).
- the number of bits of L1B_Reserved is undetermined (TBD: To Be Determined), but is currently 49 bits.
- the 32-bit L1B_crc indicates that a CRC value is included.
- uimsbf unsigned integer most significant bit first
- bslbf bit string, left bit first
- L1 basic information (L1-Basic) are described in “Table 9.2 L1-Basic signaling fields and syntax” of Non-Patent Document 1 described above.
- FIG. 10 to 12 are diagrams showing examples of syntax of L1 detailed information (L1-Detail) included in the preamble of FIG.
- the 4-bit L1D_version represents a version of L1 detailed information.
- the 19-bit L1D_rf_frequency represents the frequency of the RF channel coupled by channel bonding.
- L1B_time_info_flag 1 in the L1 basic information of FIG. 9, it indicates that time information is present, so L1D_time_info as time information is arranged in L1 detailed information. Note that the number of bits of L1D_time_info is considered as undetermined (TBD).
- the 1-bit L1D_mimo represents subframe MIMO usage.
- One bit L1D_miso represents the usage status of subframes MISO.
- the 2-bit L1D_fft_size represents the FFT size of the subframe.
- the 3-bit L1D_reduced_carriers represent the number of control units according to the reduction of the maximum number of FFT size carriers used in a subframe.
- the 4-bit L1D_guard_interval represents the guard interval length of a subframe.
- the 11-bit L1D_num_ofdm_symbols represents the number of OFDM symbols included in a subframe.
- the 5-bit L1D_scattered_pilot_pattern represents an SP pattern used in a subframe.
- 3-bit L1D_scattered_pilot_boost represents a value for increasing the size of the SP pattern.
- One bit L1D_sbs_first represents the beginning of the SBS of the subframe.
- One bit L1D_sbs_last represents the end of SBS of the subframe.
- One-bit L1D_subframe_multiplex indicates whether a subframe is time division multiplexed.
- the 1-bit L1D_frequency_interleaver represents whether or not there is frequency interleaving.
- L1D_num_plp parameters relating to PLP are arranged.
- FIG. 13 is a diagram showing an outline of a transmission method for transmitting notification data as private user data.
- Private user data can be transmitted using any of the following transmission methods (A) to (H).
- A Generic packet extension header transmission method
- B L2 signaling header transmission method
- C L2 signaling transmission method
- D BB packet extension header transmission method
- E Generic packet external structure method 1
- F Generic packet external structure method 2
- G BB packet external structure method
- H IP packet transmission method
- the layer 1 (L1) which is a physical layer the layer 2 (L2) which is an upper layer of the layer 1, and the upper layer of the layer 2 A certain layer 3 (L3) has a hierarchical structure.
- an IP packet IP / UDP packet
- tuning information may be included in LLS signaling so that the LLS signaling may be arranged in an IP packet.
- This IP packet (IP / UDP packet) is composed of an IP header and a payload.
- data of video and audio components, data of signaling such as SLS signaling, and the like are arranged.
- private user data (notification data) is arranged in the payload of the IP packet.
- a Generic packet as a transmission packet is transmitted.
- This Generic packet consists of a Generic header and a payload.
- the payload of the Generic packet one or more IP packets or tuning information are placed and encapsulated.
- BB packet Baseband Packet
- This BB packet is composed of a BBP header and a payload.
- the payload of the BB packet one or more Generic packets are placed and encapsulated.
- private user data (notification data) is arranged in the extended header of the BB packet.
- private user data (notification data) is arranged using the external structure of the BB packet.
- layer 1 data obtained by scrambling one or more BB packets is mapped to an FEC frame (FEC frame), and a parity for error correction of the physical layer is added.
- the physical layer frame is composed of a bootstrap, a preamble, and a payload, and after performing bit interleaving on a plurality of FEC frames for this payload, mapping processing is performed, and further, time direction And data obtained by performing processing (modulation processing) of the physical layer such as interleaving in the frequency direction.
- the frame length of the physical layer frame is, for example, 100 to 200 ms.
- the information (notification data) of the demodulation device 211 (demodulation device) of the former stage can be processed at the latter stage of the processing device 212 (system on) in high speed and in real time. Can be transmitted to the chip (SoC).
- SoC chip
- each transmission method shown in FIG. 13 since the extension is performed with the same format as each packet, the processing of the demodulation device 211 of the former stage and the processing device 212 of the latter stage can be easily implemented.
- each transmission scheme shown in FIG. 13 is premised to adopt the IP transmission scheme, but in the receiving system 20, the demodulator 211 in the former stage and the processor 212 in the latter stage are single.
- the devices are connected via an interface (I / F) 213, and the devices are realized by a single interface (I / F), as in the configuration corresponding to the conventional transport stream (TS).
- I / F interface
- TS transport stream
- FIG. 14 shows the configuration of a Generic packet.
- 3-bit type information (Type) is set at the head of the Generic packet and the Generic header in FIG. This type information is set with information on the type of data placed in the payload of the generic.
- 1-bit packet configuration information (PC: Packet Configuration) is arranged next to the type information.
- PC Packet Configuration
- HM Header Mode
- the single packet mode is selected according to the 1-bit header mode (HM: Header Mode) to be arranged next to the Generic header.
- 11-bit length information (Length)
- an extension header (Additional header) are arranged.
- the payload is placed following the Generic header.
- a generic packet in which the extension header is not arranged is referred to as a normal packet, while a generic packet in which the extension header is arranged is referred to as a long packet.
- a segmentation mode (Segmentation mode) or a concatenation mode (Segmentation / Concatenation) to be arranged next to that is selected.
- Concatenation mode 11 bits of length information (Length) and an extension header (Additional header) are placed in the Generic header.
- extension header In the Generic extension header transmission method, private user data is arranged in an extension header (Additional header) surrounded by a frame A in the drawing. That is, in the case of single packet mode (long packet) and segmentation mode, when "1" is set as an optional extension header flag (OHF: Optional Header Extension Flag) in the extension header, an optional header (Optional Header) Is placed. In addition, in the case of the concatenation mode, in the extension header, when “1” is set as the substream identification flag (SIF: Sub-stream Identifier Flag), an optional header is arranged.
- SIF Sub-stream Identifier Flag
- the structure shown in FIG. 15 can be arranged in this optional header.
- various types of information are arranged for each extension header index information (Additional header Index). For example, when "000000" is set as the extension header index information, it can be defined in the optional header that private user data is arranged.
- a combination of a data ID (DATA_ID) and notification data (DATA) identified by the data ID is arranged.
- DATA_ID data ID
- DATA notification data
- FIG. 15 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the private user data shown in FIG. 15 is an example, and other private user data may be arranged.
- the Generic packet extension header transmission method as a transmission format for transmitting private user data, in the reception system 20, the demodulation device 211 at the front stage and the processing device 212 at the rear stage.
- Private user data (notification data) can be notified using the extended header of the Generic packet.
- FIG. 16 shows the configuration of a Link Layer Signaling (LLS) packet as a Layer 2 Generic packet.
- LLC Link Layer Signaling
- IP packet and L2 signaling are arranged in the payload of the Generic packet, but in this example, LLS signaling is arranged as L2 signaling.
- This LLS signaling includes, for example, metadata such as SLT.
- the Generic packet is an LLS packet (LLS Packet).
- the LLS packet is composed of an LLS header (LLS Header) and a payload in which LLS signaling (LLS) is arranged.
- LLS LLS signaling
- an LLS packet is placed in the payload of the BB packet and encapsulated.
- LLS Index LLS index information
- Object Version object version information
- compression information In LLS index information, compression information (Compression Scheme), type information (Fragment Type), and extension type information (Type Extension) are arranged.
- compression information information indicating the presence or absence of compression of the target LLS signaling is set. For example, when “0000” is set, it indicates that the file is uncompressed, and when "0001" is set, it indicates that the file is compressed in the zip format.
- type information information on the type of LLS signaling is set.
- “000000” is set as the type information, it can be defined that the private user data is arranged in the extended type information.
- extension parameters are set for each type.
- “000000” is set as the type information
- data of the tuning frequency is arranged.
- data of L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the private user data shown in FIG. 16 is an example, and other private user data may be arranged.
- the demodulation device 211 at the former stage and the L2 processor at the latter stage The header of the signaling can be used to notify private user data (notification data).
- LLS signaling is arranged as L2 signaling for convenience of explanation, but it is also assumed that LLS signaling is actually transmitted as an IP / UDP packet. The same structure can be used even when L2 signaling other than LLS signaling is used.
- FIG. 17 is a diagram illustrating an example of a syntax of L2 signaling (Private_User_data_signaling ()) corresponding to private user data.
- the 8-bit signaling_type represents a type according to the type of L2 signaling. For example, in L2 signaling corresponding to private user data, "0xff" is set as signaling_type.
- 8-bit NUM_DATA represents the number of pieces of private user data arranged in the L2 signaling.
- 8-bit DATA_ID and 8-bit DATA are arranged in the loop of private user data according to NUM_DATA.
- a data ID is arranged in DATA_ID.
- notification data is arranged in DATA.
- notification data (DATA) is arranged according to the data length indicated by 8-bit DATA_LENGTH.
- the loop is repeated according to the number of private user data, and a combination of the data ID (DATA_ID) and the notification data (DATA) identified by the data ID is arranged.
- DATA_ID data ID
- DATA notification data
- FIG. 18 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the private user data shown in FIG. 18 is an example, and other private user data may be arranged.
- the L2 signaling shown in FIG. 17 may be placed in the payload of the Generic packet, or in the existing L2 signaling (eg LLS signaling) placed in the payload of the Generic packet.
- the contents of L2 signaling shown in FIG. 17 may be included (added).
- L2 signaling transmission method as a transmission format for transmitting private user data
- L2 signaling from the demodulator 211 in the former stage to the processor 212 in the latter stage Can be used to notify private user data (notification data).
- FIG. 19 shows the configuration of a BB packet (Baseband Packet).
- the BB packet is composed of a BBP header and a payload.
- the BBP header in addition to a 1-byte or 2-byte header (Header), an optional field (Optional Field) and an extension field (Extension Field) can be arranged.
- the pointer information is information for indicating the position of the Generic packet arranged in the payload of the BB packet. For example, when data of a Generic packet placed last in a certain BB packet is placed across the next BB packet, position information of the Generic packet placed at the head of the next BB packet is used as pointer information. It can be set.
- the optional flag is information indicating whether or not to extend the header by arranging an optional field and an extension field.
- 3-bit extension type information (EXT_TYPE) is set.
- this type information as shown in FIG. 21, information on the type of extension field (Extension type) is set.
- extension_Length (LSB)
- LSB extension length information
- “000” is set in the extension type information.
- “110” is set in the extension type information.
- “111” is set in the extension type information.
- the extended type information of “001” to “101” is a region (Reserved) for future extension.
- BB packet extension header private user data is arranged in the extension field (BB packet extension header) by setting “110” as the extension type information. That is, when the BB packet extension header transmission method is used, "01", “10", or “11” is set as an optional flag (OPTI), and the optional field and the extension field are expanded, and further, "110" is set as extension type information (EXT_TYPE) of the optional field, and private user data is arranged in the extension field.
- OPTI optional flag
- EXT_TYPE extension type information
- the structure shown in FIG. 22 can be arranged.
- various types of information are arranged for each extension header index information (BBP Extension Header Index). For example, when "000000" is set as the extension header index information, it can be defined that private user data is placed in the extension field.
- a combination of a data ID (DATA_ID) and notification data (DATA) identified by the data ID is arranged.
- DATA_ID data ID
- DATA notification data
- FIG. 22 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the private user data shown in FIG. 22 is an example, and other private user data may be arranged.
- the demodulation device 211 at the front stage and the processing device 212 at the rear stage can be notified using the extended header of the BB packet.
- FIG. 23 schematically shows data processed by the demodulator 211 and the processor 212 of the reception system 20 when the Generic packet external structure method is adopted.
- the transmission system 10 on the transmission side can support up to 64 PLPs for each predetermined frequency band.
- the receiving system 20 on the receiving side needs to simultaneously receive up to four PLPs. That is, by simultaneously receiving a plurality of PLPs in the reception system 20 on the receiving side, it is possible to provide, for example, voice with higher robustness, video with higher quality, and the like.
- the broadcast stream input thereto includes four PLPs PLP # 0 to PLP # 3.
- PLP # 0 for example, LLP signaling (Signaling) in PLP # 0
- robust audio Robot Audio
- video base video
- Video Video
- enhanced video in PLP # 3.
- Enhanced Video is transmitted respectively.
- a Generic packet is extracted from the BB packet for each PLP, and is input to the demodulation multiplexer 251.
- the demodulation multiplexer 251 processes the Generic packet input for each PLP, and outputs the Generic packet to the processing unit 212 of the subsequent stage via a single interface (I / F) 213.
- the demodulation multiplexer 251 when processing the Generic packet input for each PLP, causes private user data to be added to the outside of the Generic packet. That is, in the receiving system 20, private user data is added outside the Generic packet by the demodulator 211. Furthermore, here, the demodulation device 211 notifies the processing device 212 of the PLP ID of the data ID that is “0x01” as private user data, thereby providing a single unit between the demodulation device 211 and the processing device 212. Interface (I / F) 213 is realized.
- the processing device 212 from the generic packet (gene packet to which private user data is added) input from (the demodulation multiplexer 251 of) the demodulator 211 via the single interface (I / F) 213 An IP packet (IP / UDP packet) is extracted and input to the IP demultiplexer 252. Then, the IP demultiplexer 252 processes the IP packet to output data transmitted in a ROUTE session or the like to a subsequent stage.
- PLP ID is included as private user data. Therefore, in the reception system 20, between the demodulator 211 and the processor 212, a Generic packet obtained from each PLP (PLP # 0 to PLP # 3) is transmitted by a single interface (I / F) 213. Even in this case, on the processing device 212 side, it is possible to identify to which PLP the Generic packet (IP packet) input from the demodulation device 211 belongs by the PLP ID included in the private user data. .
- FIG. 24 is a diagram showing a packet structure when private user data is added outside (outside) the Generic packet in the demodulator 211 of the receiving system 20 when the Generic packet external structure method 1 is adopted. .
- a of FIG. 24 shows the structure of a Generic packet.
- the Generic packet consists of a Generic header and a payload. For example, by adding private user data to this Generic packet, private user data can be added outside the Generic packet as shown in B of FIG.
- FIG. 25 is a diagram showing an example of syntax of private user data (Private_User_data) added to the outside of the Generic packet of FIG.
- the 8-bit Packet_type represents a type according to the type of packet. For example, “101” is set as Packet_type for a Generic packet to which private user data is externally added.
- the 1-bit PC Packet Configuration
- HM Header Mode
- the 11-bit Length represents the packet length of the Generic packet.
- the 8-bit NUM_DATA represents the number of private user data added to the outside of the Generic packet.
- 8-bit DATA_ID and 8-bit DATA are arranged in the loop of private user data according to NUM_DATA.
- a data ID is arranged in DATA_ID.
- notification data is arranged in DATA.
- notification data (DATA) is arranged according to the data length indicated by 8-bit DATA_LENGTH.
- the loop is repeated according to the number of private user data, and a combination of the data ID (DATA_ID) and the notification data (DATA) identified by the data ID is arranged.
- DATA_ID data ID
- DATA notification data
- FIG. 26 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the demodulation device 211 of the former stage and the processing device 212 of the latter stage Private user data (notification data) can be notified using the external structure of the Generic packet.
- FIG. 27 is a diagram showing a packet structure when private user data is added outside (outside) the Generic packet in the demodulator 211 of the receiving system 20 when the Generic packet external structure method 2 is adopted. .
- a of FIG. 27 shows the structure of a Generic packet.
- the Generic packet consists of a Generic header and a payload.
- private user data can be added outside the generic packet as shown in B of FIG.
- FIG. 28 is a diagram illustrating an example of syntax of private user data (Private_User_data) including the Generic packet of B of FIG.
- the 8-bit Packet_type represents a type according to the type of packet. For example, "100”, “101”, “110”, and “111” are set as Packet_type for packets of private user data including a Generic packet. For example, when “100”, “101” or “111” is set as the Packet_type, the payload of the Generic packet includes an IPv4 packet, a compressed IP packet, or LLS signaling. Note that "110" as the Packet_type. If is set, it means the extension of packet type (Packet Type Extension).
- the 1-bit PC Packet Configuration
- HM Header Mode
- the 11-bit Length represents the packet length of the Generic packet.
- the 8-bit NUM_DATA represents the number of private user data added to the outside of the Generic packet.
- 8-bit DATA_ID and 8-bit DATA are arranged in the loop of private user data according to NUM_DATA.
- a data ID is arranged in DATA_ID.
- notification data is arranged in DATA.
- notification data (DATA) is arranged according to the data length indicated by 8-bit DATA_LENGTH.
- the loop is repeated according to the number of private user data, and a combination of the data ID (DATA_ID) and the notification data (DATA) identified by the data ID is arranged.
- DATA_ID data ID
- DATA notification data
- FIG. 29 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- Generic packets are placed in 8-bit Generic_Packet_Payload. That is, when the Generic packet external structure method 2 is adopted, the Generic packet is included in private user data.
- the demodulation device 211 in the former stage and the processing device 212 in the latter stage Private user data (notification data) can be notified using the external structure of the Generic packet.
- FIG. 30 schematically shows data processed by the demodulator 211 and the processor 212 of the reception system 20 when the BB packet external structure method is adopted.
- PLP # 0 to PLP # 3 are included in the broadcast stream inputted thereto.
- LLP signaling Signaling in PLP # 0
- robust audio Robot Audio
- video base video
- audio in PLP # 2
- enhanced video in PLP # 3. (Enhanced Video) is transmitted respectively.
- BB packets are extracted for each PLP and input to demodulation multiplexer 253.
- the demodulation multiplexer 253 processes the BB packet input for each PLP, and outputs the BB packet to the processing unit 212 of the subsequent stage via a single interface (I / F) 213.
- the demodulation multiplexer 253 when processing the BB packet input for each PLP, causes private user data to be added outside the BB packet. That is, in the reception system 20, private user data is added to the outside of the BB packet by the demodulator 211. Furthermore, here, the demodulation device 211 notifies the processing device 212 of the PLP ID of the data ID that is “0x01” as private user data, thereby providing a single unit between the demodulation device 211 and the processing device 212. Interface (I / F) 213 is realized.
- the processing device 212 the BB packet (BB packet to which private user data is added) input from (the demodulation multiplexer 253 of) the demodulator 211 via the single interface (I / F) 213 is , BBP demultiplexer 254.
- the BBP demultiplexer 254 extracts the Generic packet from the BB packet by processing the BB packet. Then, by processing an IP packet (IP / UDP packet) extracted from the Generic packet, data transmitted in a ROUTE session or the like is output to the subsequent stage.
- IP packet IP / UDP packet
- PLP ID is included as private user data. Therefore, in the receiving system 20, the BB packet obtained from each PLP (PLP # 0 to PLP # 3) is transmitted between the demodulator 211 and the processor 212 by the single interface (I / F) 213. Even in this case, on the processing device 212 side, it is possible to identify to which PLP the BB packet (IP packet) input from the demodulation device 211 belongs by the PLP ID included in the private user data. .
- FIG. 31 is a diagram showing the packet structure when private user data is added to the outside (outside) of the BB packet in the demodulator 211 of the receiving system 20 when the BB packet external structure method is adopted.
- a in FIG. 31 shows the structure of the BB packet.
- the BB packet is composed of a BBP header and a payload. For example, by adding private user data to this BB packet, private user data can be added outside the BB packet as shown in B of FIG.
- FIG. 32 is a diagram showing the structure of private user data added to the outside of the BB packet.
- a header of 1 or 2 bytes, an optional field, and an extension field can be arranged.
- 3-bit extension type information (EXT_TYPE) is set at the beginning of the optional field.
- this type information as shown in FIG. 32, information on the type of extension field (Extension type) is set.
- the structure shown in FIG. 33 can be arranged.
- various types of information are arranged for each extension header index information (BBP Extension Header Index). For example, when "000000" is set as the extension header index information, it can be defined that private user data is placed in the extension field.
- a combination of a data ID (DATA_ID) and notification data (DATA) identified by the data ID is arranged.
- DATA_ID data ID
- DATA notification data
- FIG. 33 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the private user data shown in FIG. 33 is an example, and other private user data may be arranged.
- the demodulation device 211 in the previous stage transmits the BB to the processing device 212 in the latter stage.
- Private user data (notification data) can be notified using the external structure of the packet.
- IP Packet Transmission Method Next, the IP packet transmission method will be described with reference to FIG. 34 to FIG. In this IP packet transmission method, private user data (notification data) is transmitted using an IP packet (IP / UDP packet).
- FIG. 34 shows a configuration example of the receiving system 20 in the case of adopting the IP packet transmission method.
- the receiving system 20 includes a home gateway 261 at the front stage and a client device 262 at the rear stage. Data transmission via the network 263 is performed between the home gateway 261 and the client device 262. That is, in the reception system 20, a home gateway 261 such as a home server or a television receiver and a client device 262 such as a smartphone or a tablet terminal are connected to a network 263 such as a wireless LAN (Local Area Network) in the home.
- a home gateway 261 such as a home server or a television receiver
- a client device 262 such as a smartphone or a tablet terminal
- the so-called home network system is configured.
- the home gateway 261 receives the digital broadcast signal transmitted from the transmission system 10 via the transmission path 30, and processes the content included in the broadcast stream.
- the home gateway 261 transmits (distributes) the content obtained by processing the broadcast stream to the client device 262 via the network 263. Meanwhile, the client device 262 receives and processes (reproduces) the content transmitted via the network 263.
- the home gateway 261 includes an RF unit 271, a demodulation unit 272, an error processing unit 273, a generation unit 274, a private user data processing unit 275, a conversion unit 276, and a transmission unit 277.
- the RF unit 271, the demodulation unit 272, and the error processing unit 273 perform demodulation processing (for example, OFDM demodulation) or error correction decoding processing (for example, Processing is performed on the physical layer frame by performing LDPC decoding, BCH decoding, and the like.
- demodulation processing for example, OFDM demodulation
- error correction decoding processing for example, Processing is performed on the physical layer frame by performing LDPC decoding, BCH decoding, and the like.
- the data (received data) processed by the RF unit 271 to the error processing unit 273 is supplied to the generation unit 274.
- the RF unit 271, the demodulation unit 272, and the error processing unit 273 supply the private user data processing unit 275 with notification data to be notified to the client device 262 in the latter stage, which is obtained by the respective units performing processing.
- the notification data includes channel selection information used at the time of channel selection, information on the state of demodulation processing, information on errors in demodulation processing, or information on signaling or modulation parameters obtained in demodulation processing, etc. .
- the private user data processing unit 275 processes notification data supplied from the RF unit 221, the demodulation unit 222, or the error processing unit 223, and generates data (reception data) processed by the RF unit 271 to the error processing unit 273. On the other hand, it is inserted as private user data.
- the Generic packet is extracted from the BB packet by processing the data processed by the RF unit 271 to the error processing unit 273, and further, the ISO BMFF (see FIG. Processing to convert to the file format of Base Media File Format) is performed. Further, the generation unit 274 stores the video and audio data converted into the file format of ISO BMFF in an IP packet (IP / UDP packet), and supplies the data to the transmission unit 277.
- IP / UDP packet IP / UDP packet
- the private user data processing unit 275 supplies the processed notification data to the conversion unit 276, so that the conversion unit 276 converts the notification data into the file format of ISO BMFF, and the IP packet (IP / UDP packet To be stored in).
- the IP packet storing the notification data from the conversion unit 276 is supplied to the transmission unit 277.
- the notification data processed by the private user data processing unit 275 is converted as private user data into a format that can be transmitted together with the received data obtained by the demodulation processing.
- the transmission unit 277 is supplied with the IP packet from the generation unit 274 and the IP packet from the conversion unit 276.
- the transmitting unit 277 transmits (distributes) an IP packet (IP / UDP packet) including received data or notification data to the client apparatus 262 via the network 263.
- the home gateway 261 is configured as described above.
- the client apparatus 262 includes a receiving unit 281, a filter processing unit 282, a decoder 283, an output unit 284, and an internal control unit 285.
- the receiving unit 281 receives the IP packet transmitted from the home gateway 261 via the network 263 and supplies the IP packet to the filtering unit 282.
- IP packet IP / UDP packet
- received data obtained by demodulation processing and private user data notification data
- the filter processing unit 282 performs a filtering process on the IP packet supplied from the receiving unit 281. By this filtering process, the IP packet storing the received data is supplied to the decoder 283, and the IP packet storing the private user data (notification data) is supplied to the internal control unit 285.
- the decoder 283 is supplied with data of video and audio components obtained from the received data (in the file format of ISO BMFF) stored in the IP packet supplied from the filter processing unit 282.
- the decoder 283 decodes data of video and audio components, and supplies data obtained thereby to the output unit 284.
- the output unit 284 outputs video data of the data supplied from the decoder 283 to a display unit (not shown) and outputs audio data to a speaker (not shown).
- the client apparatus 262 reproduces the video and audio of the content distributed from the home gateway 261.
- the internal control unit 285 is also supplied with private user data (notification data) (in the file format of ISO BMFF) stored in the IP packet supplied from the filter processing unit 282.
- the internal control unit 285 performs processing according to notification data notified (transmitted) as private user data.
- the notification data includes channel selection information used at the time of channel selection, information on the state of demodulation processing, information on errors in demodulation processing, or information on signaling or modulation parameters obtained in demodulation processing. ing.
- the internal control unit 285 controls the operation of each unit of the client apparatus 262 based on such notification data.
- the client device 262 is configured as described above.
- FIG. 35 is a diagram showing a packet structure when private user data is stored in an IP packet (IP / UDP packet) in the home gateway 261 of the reception system 20 when the IP packet transmission method is adopted. .
- an IP packet is composed of an IP header and a payload.
- a combination of a data ID (DATA_ID) and notification data (DATA) identified by the data ID is arranged as private user data.
- DATA_ID data ID
- DATA notification data
- FIG. 35 when a data ID of "0x00" is designated, data of a tuning frequency is arranged.
- L1 basic information L1-Basic
- L1 details Data of information L1-Detail
- the demodulation device 211 of the former stage transmits an IP packet to the processing device 212 of the latter stage.
- Private user data (notification data) can be notified using (IP / UDP packet).
- the home network system is an example, for example, an internet distribution system etc.
- Other systems may be configured.
- the content distributed from the distribution server (content redistribution device) corresponding to the home gateway 261 of FIG. 34 is a client via the network 263 such as the Internet. It is received by an information device such as the device 262 (for example, a smartphone, a tablet terminal, etc.) and reproduced.
- step S211 the RF unit 221 of the demodulation device 211 performs processing for receiving a digital broadcast signal.
- the demodulation unit 222 and the error processing unit 223 of the demodulation device 211 perform demodulation processing and error correction decoding processing on the signal obtained in the reception processing of step S211.
- the received data is processed.
- step S213 the private user data processing unit 224 of the demodulation device 211 processes the notification data to be notified to the processing device 212 in the subsequent stage obtained in the processing in steps S211 and S212, and the data obtained in the processing in step S212.
- the private user data processing unit 224 processes the notification data to be notified to the processing device 212 in the subsequent stage, and makes the data transmittable together with the reception data obtained by the demodulation processing.
- the transmission method the transmission format shown in FIG. 13 described above can be adopted.
- step S214 the output I / F 225 transmits the private user data (notification data) obtained in the process of step S213 via the interface (I / F) 213 together with the received data obtained in the process of step S212.
- the data is output to the downstream processing unit 212.
- step S 251 the input I / F 231 supplies the data input from the demodulator 211 in the previous stage via the interface (I / F) 213 to the filter processor 232.
- step S ⁇ b> 252 the filter processing unit 232 performs a filtering process on data (a packet storing the data) supplied from the input I / F 231.
- the received data (the packet storing the packet) is supplied to the decoder 233, and the private user data (notification data) (the packet storing the packet) is supplied to the internal control unit 235.
- step S253 the data of video and audio components obtained in the process of step S252 is decoded. Then, the output unit 234 outputs video data of the data from the decoder 233 to a display unit (not shown) and outputs audio data to a speaker (not shown). As a result, in the reception system 20, the video and audio of the content distributed from the transmission system 10 are reproduced.
- the internal control unit 235 performs processing according to the private user data (notification data) obtained in the processing of step S252.
- the notification data includes channel selection information used at the time of channel selection, information on the state of demodulation processing, information on errors in demodulation processing, or information on signaling or modulation parameters obtained in demodulation processing. ing.
- the internal control unit 235 controls the operation of each unit of the processing device 212 based on such notification data.
- the ATSC in particular, ATSC 3.0
- ATSC 3.0 which is a system adopted in the United States and the like
- DVB Digital Video Broadcasting
- the ATSC 3.0 in which the IP transmission method is adopted has been described as an example, but the present invention is not limited to the IP transmission method, and is applied to other methods such as the MPEG2-TS (Transport Stream) method. You may do so.
- BS Broadcasting Satellite
- CS Communications Satellite
- CATV cable television
- BBP Baseband Packet
- BBS Baseband Stream
- ALP AccessC Link-layer Protocol
- time information information on time defined by PTP or UTC is described as time information, but not limited thereto, for example, defined by NTP (Network 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.
- NTP Network Time Protocol
- 3GPP Third Generation Partnership Project
- the present technology prescribes a predetermined standard (assuming use of a transmission line other than a broadcast network, ie, a communication line (communication network) such as the Internet or a telephone network) as a transmission line.
- a communication line such as the Internet or a telephone network may be used as the transmission line 30 of the transmission system 1 (FIG. 1), and the transmission system 10 may be a server provided on the Internet.
- the transmitting system 10 server
- the transmitting system 10 server
- the transmitting system 10 processes data transmitted from the transmitting system 10 (server) through the transmission path 30 (communication line).
- FIG. 38 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 removable media 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 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 mounting the removable media 1011 in 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.
- the notification data may be information on tuning information used at the time of tuning, information on the state of the demodulation process, information on an error in the demodulation process, or information on signaling or modulation parameters obtained in the demodulation process.
- the data processing device according to (1) which includes at least.
- the data processing device in the previous stage is a demodulation device that performs demodulation processing
- the data processing device at the latter stage is a processing device that performs processing at the second stage of the demodulation process
- the digital broadcast signal corresponds to an IP transmission method using an IP (Internet Protocol) packet including a UDP (User Datagram Protocol) packet
- the notification data may include an extension header of a first transmission packet for transmitting the IP packet, signaling included in the first transmission packet, a header of the signaling, and a first transmission packet for transmitting the first transmission packet.
- the data processing device according to (6), wherein the data processing apparatus is added to an extension header of 2 transmission packets, an extension area outside the first transmission packet, or an extension area outside the second transmission packet.
- the previous stage data processing apparatus is an information processing apparatus that distributes content obtained from the digital broadcast signal
- the data processing device in the latter stage is a terminal device that reproduces the content distributed from the information processing device,
- the data processing device according to any one of (1) to (5), wherein the information processing device and the terminal device are configured as separate devices and connected via a network.
- the digital broadcast signal corresponds to an IP transmission method using an IP packet including a UDP packet
- the previous stage data processing apparatus further includes an IP conversion unit that converts the packet storing the received data and the packet storing the notification data into an IP packet,
- the output unit transmits the notification data stored in the IP packet, together with the received data stored in the IP packet, to the data processing device in the subsequent stage via the network.
- the data processing apparatus according to any one of (1) to (10), wherein the second stage data processing apparatus performs processing according to the notification data output from the first stage data processing apparatus.
- the data processor at the preceding stage is Receive digital broadcast signal, Among data obtained by performing demodulation processing on the digital broadcast signal, notification data to be notified to a subsequent data processing apparatus that performs processing on the latter stage of the demodulation processing is processed and obtained from the digital broadcast signal In a format that can be transmitted along with the received data, Outputting the notification data together with the received data to the data processing device in the subsequent stage.
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Abstract
Description
2.プライベートユーザデータの概要
3.プライベートユーザデータの伝送方式
(A)Genericパケット拡張ヘッダ伝送方式
(B)L2シグナリングヘッダ伝送方式
(C)L2シグナリング伝送方式
(D)BBパケット拡張ヘッダ伝送方式
(E)Genericパケット外部構造方式1
(F)Genericパケット外部構造方式2
(G)BBパケット外部構造方式
(H)IPパケット伝送方式
4.受信システムで実行される処理の流れ
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の送信システム10の構成例を示す図である。
図3は、図1の受信システム20の構成例を示す図である。
図4は、プライベートユーザデータの例を示す図である。
図5は、物理層フレームの構造を示す図である。図5において、横方向は、時間(Time)を表し、縦方向は、周波数(Frequency)を表している。
図6乃至図8は、図5のブートストラップの構造を示す図である。
図9は、図5のプリアンブルに含まれるL1基本情報(L1-Basic)のシンタックスの例を示す図である。
図10乃至図12は、図5のプリアンブルに含まれるL1詳細情報(L1-Detail)のシンタックスの例を示す図である。
図13は、通知データを、プライベートユーザデータとして伝送するための伝送方式の概要を示す図である。
(B)L2シグナリングヘッダ伝送方式
(C)L2シグナリング伝送方式
(D)BBパケット拡張ヘッダ伝送方式
(E)Genericパケット外部構造方式1
(F)Genericパケット外部構造方式2
(G)BBパケット外部構造方式
(H)IPパケット伝送方式
まず、図14乃至図15を参照して、Genericパケット拡張ヘッダ伝送方式について説明する。このGenericパケット拡張ヘッダ伝送方式では、Genericパケットの拡張ヘッダを利用して、プライベートユーザデータ(通知データ)が伝送される。
次に、図16を参照して、L2シグナリングヘッダ伝送方式について説明する。このL2シグナリングヘッダ伝送方式では、Genericパケットのペイロードに配置されるL2シグナリングのヘッダを利用して、プライベートユーザデータ(通知データ)が伝送される。
次に、図17乃至図18を参照して、L2シグナリング伝送方式について説明する。このL2シグナリング伝送方式では、Genericパケットのペイロードに配置されるL2シグナリングを利用して、プライベートユーザデータ(通知データ)が伝送される。
次に、図19乃至図22を参照して、BBパケット拡張ヘッダ伝送方式について説明する。このBBパケット拡張ヘッダ伝送方式では、BBパケットの拡張ヘッダを利用して、プライベートユーザデータ(通知データ)が伝送される。
次に、Genericパケット外部構造方式について説明するが、Genericパケット外部構造方式には、2つの方式がある。そこで、まず、図23を参照して、2つの方式に共通する部分について説明してから、その後、図24乃至図26を参照して、1つ目の方式であるGenericパケット外部構造方式1について説明し、さらに、図27乃至図29を参照して、2つ目の方式であるGenericパケット外部構造方式2について説明する。
Genericパケット外部構造方式では、Genericパケットの外部構造を利用して、プライベートユーザデータ(通知データ)が伝送される。ここで、図23には、Genericパケット外部構造方式を採用した場合における受信システム20の復調装置211と処理装置212で処理されるデータを模式的に表している。
図24は、Genericパケット外部構造方式1を採用した場合に、受信システム20の復調装置211において、Genericパケット外(外部)に、プライベートユーザデータを付加するときのパケットの構造を表した図である。
図25は、図24のBのGenericパケットの外部に付加されたプライベートユーザデータ(Private_User_data)のシンタックスの例を示す図である。
次に、図27乃至図29を参照して、Genericパケット外部構造方式2について説明する。
図27は、Genericパケット外部構造方式2を採用した場合に、受信システム20の復調装置211において、Genericパケット外(外部)に、プライベートユーザデータを付加するときのパケットの構造を表した図である。
図28は、図27のBのGenericパケットを含むプライベートユーザデータ(Private_User_data)のシンタックスの例を示す図である。
次に、図30乃至図33を参照して、BBパケット外部構造方式について説明する。このBBパケット外部構造方式では、BBパケットの外部構造を利用して、プライベートユーザデータ(通知データ)が伝送される。
ここで、図30には、BBパケット外部構造方式を採用した場合における受信システム20の復調装置211と処理装置212で処理されるデータを模式的に表している。
図31は、BBパケット外部構造方式を採用した場合に、受信システム20の復調装置211において、BBパケット外(外部)に、プライベートユーザデータを付加するときのパケットの構造を表した図である。
図32は、BBパケットの外部に付加されるプライベートユーザデータの構造を表した図である。
最後に、図34乃至図35を参照して、IPパケット伝送方式について説明する。このIPパケット伝送方式では、IPパケット(IP/UDPパケット)を利用して、プライベートユーザデータ(通知データ)が伝送される。
ここで、図34には、IPパケット伝送方式を採用した場合における受信システム20の構成例を示している。
図35は、IPパケット伝送方式を採用した場合に、受信システム20のホームゲートウェイ261において、IPパケット(IP/UDPパケット)に、プライベートユーザデータを格納するときのパケットの構造を表した図である。
まず、図36のフローチャートを参照して、前段の復調装置211により実行される送信側復調装置の処理について説明する。
次に、図37のフローチャートを参照して、後段の処理装置212により実行される受信側処理装置の処理について説明する。
前段のデータ処理装置であって、
デジタル放送信号を受信する受信部と、
前記デジタル放送信号に対する復調処理を行うことで得られるデータのうち、前記復調処理の後段の処理を行う後段のデータ処理装置に通知すべき通知データを処理して、前記デジタル放送信号から得られた受信データとともに伝送可能な形式にする処理部と、
前記受信データとともに、前記通知データを、前記後段のデータ処理装置に出力する出力部と
を備えるデータ処理装置。
(2)
前記処理部は、デジタル放送の規格であらかじめ予約されている領域に、前記通知データを追加する
(1)に記載のデータ処理装置。
(3)
前記処理部は、前記通知データを識別可能な識別情報とともに、前記通知データを追加する
(2)に記載のデータ処理装置。
(4)
前記通知データは、選局時に用いられる選局情報、前記復調処理の状態に関する情報、前記復調処理のエラーに関する情報、又は、前記復調処理で得られるシグナリング若しくは変調パラメータに関する情報のいずれかの情報を少なくとも含んでいる
(1)に記載のデータ処理装置。
(5)
前記通知データは、前記前段のデータ処理装置又は前記後段のデータ処理装置を製造するメーカにより独自に拡張されたデータをさらに含んでいる
(4)に記載のデータ処理装置。
(6)
前記前段のデータ処理装置は、復調処理を行う復調装置であり、
前記後段のデータ処理装置は、前記復調処理の後段の処理を行う処理装置であり、
前記復調装置と前記処理装置とは、同一の機器内に設けられ、単一のインターフェースを介して接続される
(1)乃至(5)のいずれかに記載のデータ処理装置。
(7)
前記通知データは、前記受信データを格納するパケットの拡張領域に格納される
(6)に記載のデータ処理装置。
(8)
前記デジタル放送信号は、UDP(User Datagram Protocol)パケットを含むIP(Internet Protocol)パケットを用いたIP伝送方式に対応しており、
前記通知データは、前記IPパケットを伝送するための第1の伝送パケットの拡張ヘッダ、前記第1の伝送パケットに含まれるシグナリング、前記シグナリングのヘッダ、前記第1の伝送パケットを伝送するための第2の伝送パケットの拡張ヘッダ、前記第1の伝送パケットの外部の拡張領域、又は、前記第2の伝送パケットの外部の拡張領域に付加されている
(6)に記載のデータ処理装置。
(9)
前記前段のデータ処理装置は、前記デジタル放送信号から得られるコンテンツの配信を行う情報処理装置であり、
前記後段のデータ処理装置は、前記情報処理装置から配信される前記コンテンツの再生を行う端末装置であり、
前記情報処理装置と前記端末装置とは、別個の装置として構成され、ネットワークを介して接続される
(1)乃至(5)のいずれかに記載のデータ処理装置。
(10)
前記デジタル放送信号は、UDPパケットを含むIPパケットを用いたIP伝送方式に対応しており、
前記前段のデータ処理装置は、前記受信データを格納するパケット及び前記通知データを格納するパケットを、IPパケットに変換するIP変換部をさらに備え、
前記出力部は、前記IPパケットに格納された前記受信データとともに、前記IPパケットに格納された前記通知データを、前記ネットワークを介して前記後段のデータ処理装置に送信する
(9)に記載のデータ処理装置。
(11)
前記後段のデータ処理装置は、前記前段のデータ処理装置から出力される前記通知データに応じた処理を行う
(1)乃至(10)のいずれかに記載のデータ処理装置。
(12)
前段のデータ処理装置のデータ処理方法において、
前記前段のデータ処理装置が、
デジタル放送信号を受信し、
前記デジタル放送信号に対する復調処理を行うことで得られるデータのうち、前記復調処理の後段の処理を行う後段のデータ処理装置に通知すべき通知データを処理して、前記デジタル放送信号から得られた受信データとともに伝送可能な形式にし、
前記受信データとともに、前記通知データを、前記後段のデータ処理装置に出力する
ステップを含むデータ処理方法。
Claims (12)
- 前段のデータ処理装置であって、
デジタル放送信号を受信する受信部と、
前記デジタル放送信号に対する復調処理を行うことで得られるデータのうち、前記復調処理の後段の処理を行う後段のデータ処理装置に通知すべき通知データを処理して、前記デジタル放送信号から得られた受信データとともに伝送可能な形式にする処理部と、
前記受信データとともに、前記通知データを、前記後段のデータ処理装置に出力する出力部と
を備えるデータ処理装置。 - 前記処理部は、デジタル放送の規格であらかじめ予約されている領域に、前記通知データを追加する
請求項1に記載のデータ処理装置。 - 前記処理部は、前記通知データを識別可能な識別情報とともに、前記通知データを追加する
請求項2に記載のデータ処理装置。 - 前記通知データは、選局時に用いられる選局情報、前記復調処理の状態に関する情報、前記復調処理のエラーに関する情報、又は、前記復調処理で得られるシグナリング若しくは変調パラメータに関する情報のいずれかの情報を少なくとも含んでいる
請求項1に記載のデータ処理装置。 - 前記通知データは、前記前段のデータ処理装置又は前記後段のデータ処理装置を製造するメーカにより独自に拡張されたデータをさらに含んでいる
請求項4に記載のデータ処理装置。 - 前記前段のデータ処理装置は、復調処理を行う復調装置であり、
前記後段のデータ処理装置は、前記復調処理の後段の処理を行う処理装置であり、
前記復調装置と前記処理装置とは、同一の機器内に設けられ、単一のインターフェースを介して接続される
請求項1に記載のデータ処理装置。 - 前記通知データは、前記受信データを格納するパケットの拡張領域に格納される
請求項6に記載のデータ処理装置。 - 前記デジタル放送信号は、UDP(User Datagram Protocol)パケットを含むIP(Internet Protocol)パケットを用いたIP伝送方式に対応しており、
前記通知データは、前記IPパケットを伝送するための第1の伝送パケットの拡張ヘッダ、前記第1の伝送パケットに含まれるシグナリング、前記シグナリングのヘッダ、前記第1の伝送パケットを伝送するための第2の伝送パケットの拡張ヘッダ、前記第1の伝送パケットの外部の拡張領域、又は、前記第2の伝送パケットの外部の拡張領域に付加されている
請求項6に記載のデータ処理装置。 - 前記前段のデータ処理装置は、前記デジタル放送信号から得られるコンテンツの配信を行う情報処理装置であり、
前記後段のデータ処理装置は、前記情報処理装置から配信される前記コンテンツの再生を行う端末装置であり、
前記情報処理装置と前記端末装置とは、別個の装置として構成され、ネットワークを介して接続される
請求項1に記載のデータ処理装置。 - 前記デジタル放送信号は、UDPパケットを含むIPパケットを用いたIP伝送方式に対応しており、
前記前段のデータ処理装置は、前記受信データを格納するパケット及び前記通知データを格納するパケットを、IPパケットに変換するIP変換部をさらに備え、
前記出力部は、前記IPパケットに格納された前記受信データとともに、前記IPパケットに格納された前記通知データを、前記ネットワークを介して前記後段のデータ処理装置に送信する
請求項9に記載のデータ処理装置。 - 前記後段のデータ処理装置は、前記前段のデータ処理装置から出力される前記通知データに応じた処理を行う
請求項1に記載のデータ処理装置。 - 前段のデータ処理装置のデータ処理方法において、
前記前段のデータ処理装置が、
デジタル放送信号を受信し、
前記デジタル放送信号に対する復調処理を行うことで得られるデータのうち、前記復調処理の後段の処理を行う後段のデータ処理装置に通知すべき通知データを処理して、前記デジタル放送信号から得られた受信データとともに伝送可能な形式にし、
前記受信データとともに、前記通知データを、前記後段のデータ処理装置に出力する
ステップを含むデータ処理方法。
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