KR20170098792A - Reception apparatus, receiving method, transmission apparatus, and transmitting method - Google Patents

Abstract

The receiving apparatus includes a plurality of receivers and processing circuits. The plurality of receivers are configured to receive a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, into a plurality of data slices. The processing circuitry is configured to reconstruct the BB stream from the plurality of segmented streams based on the connection channel information. The plurality of divided streams include data transmitted in a frequency band which becomes available by connecting the channels for transmitting a plurality of data slices to each other. This technique is applied to channel bonding, for example, defined by the DVB-C2 standard and the ATSC 3.0 standard.

Description

Technical Field [0001] The present invention relates to a receiving apparatus, a receiving method, a transmitting apparatus, and a transmitting method,

The present invention relates to a receiving apparatus, a receiving method, a transmitting apparatus, and a transmitting method. More particularly, the present invention relates to a receiving apparatus, a receiving method, and a transmitting apparatus capable of effectively utilizing a frequency band while suppressing an increase in cost on the receiving side in channel bonding , And a transmission method.

<Cross reference to related application>

This application claims the benefit of Japanese Priority Patent Application JP2014-255295, filed December 17, 2014, the entire contents of which are incorporated herein by reference.

In digital broadcasting, channel bonding is known in which a stream with a high data rate is divided into a plurality of divided channels and transmitted, and a plurality of divided streams are reconstructed into a stream having an original data rate at the receiving end have.

In the digital video broadcasting-cable second generation (DVB-C2) standard, PLP bundling (physical layer pipe bundling) is specified as one of channel bonding (for example, see Non-Patent Document 1). Also, channel bonding is expected to be adopted in the next generation of Advanced Television Systems Committee Standards (ATSC) standards, also referred to as ATSC 3.0.

DVB-C2: ETSI EN 302 769 V 1.2.1 (2011-04)

In channel bonding, the bandwidth of available frequencies can be increased by connecting channels for transmitting a plurality of divided streams. However, in the reception apparatus on the reception side, it is necessary to separately provide an RF tuner and a demodulator for receiving the increased frequency band by connecting the channels. As a result, in the channel bonding, it has been necessary to effectively utilize the frequency band while suppressing an increase in the cost of the receiving side.

This technique is made in consideration of this situation. This technique makes it possible to effectively utilize the frequency band while suppressing an increase in the cost of the receiving side in the channel bonding.

A receiving apparatus according to the first aspect of the present invention includes a receiver including a plurality of receivers configured to receive a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, to be. The receiving apparatus further comprises a processing circuit configured to reconstruct the BB stream from the plurality of divided streams based on the connection channel information. The plurality of divided streams include data transmitted in a frequency band that becomes available by connecting the channels for transmitting the plurality of data slices to each other.

The receiving apparatus according to the first aspect of the present technology may be an independent apparatus and may be an inner block forming one apparatus. Further, the reception method according to the first aspect of the present technology is a reception method corresponding to the reception apparatus according to the first aspect of the present technique described above. The receiving method of the receiving apparatus includes a step of receiving, by a plurality of receivers of the receiving apparatus, a plurality of divided streams obtained by distributing a BBB frame of a BB stream, which is a stream of the BB frame, into a plurality of data slices . The method further comprises reconstructing the BB stream from the plurality of segmented streams by the processing circuitry of the receiving device based on the connection channel information. The plurality of divided streams include data transmitted in a frequency band that becomes available by connecting the channels for transmitting a plurality of data slices to each other.

In a receiving apparatus and a receiving method according to the first aspect of the present invention, when channels for transmitting a plurality of data slices are connected to each other, a plurality of data slices including data transmitted in a frequency band available by connecting the channels The BB stream is reconstructed from the plurality of divided streams based on the connection channel information enabling the plurality of receivers to receive the divided stream.

The transmission apparatus according to the second aspect of the present invention can be used by connecting a channel for transmitting a plurality of divided streams obtained by dividing a BBB frame of a BB stream, which is a stream of a BB frame, into a plurality of data slices The transmission apparatus comprising: a processing circuit configured to generate transmission control information including connection channel information enabling a receiving apparatus to receive the plurality of divided streams including data to be transmitted in a frequency band in which the receiving apparatus is capable of receiving. The transmission apparatus further includes a transmission unit configured to transmit the transmission control information together with the plurality of divided streams.

The transmission device according to the second aspect of the present technology may be an independent device or an inner block forming one device. Further, the transmission method according to the second aspect of the present technology is a transmission method corresponding to the transmission apparatus according to the second aspect of the present technique described above. The transmitting method of the transmitting apparatus is a method of transmitting a plurality of data streams by dividing a BBB frame of a BB stream, which is a stream of the BB frame, into a plurality of data slices, And generating, by the processing circuit, transmission control information including connection channel information for causing the receiving apparatus to receive a plurality of divided streams including data to be transmitted. The method further comprises transmitting, by the transmission unit, the transmission control information together with the plurality of divided streams.

In the transmitting apparatus and the transmitting method according to the second aspect of the present invention, when channels for transmitting a plurality of divided streams obtained by distributing the BB frame of the BB stream, which is a stream of the BB frame, into a plurality of data slices are connected to each other Transmission control information including connection channel information for causing a plurality of divided streams including data transmitted in a frequency band that becomes available by connecting a channel to be received is generated. In addition, the transmission control information is transmitted together with a plurality of divided streams.

According to the first and second aspects of the present invention, in the channel bonding, the frequency band can be effectively utilized while suppressing an increase in cost on the reception side.

The effects described herein are not limited, and the effect may be any effect described in this disclosure.

1 is a diagram showing the configuration of an embodiment of a transmission system to which the present technology is applied.
2 is a view for explaining a general channel bonding.
Fig. 3 is a view for explaining a configuration of a reception side in general channel bonding.
4 is a view for explaining connection channel bonding of a simple extension.
5 is a view for explaining a configuration of a reception side in connection channel bonding of the simple extension.
6 is a view for explaining connection channel bonding of the DVB-C2 standard (J.382 scheme).
Fig. 7 is a view for explaining the configuration of the receiving side in the DVB-C2 standard (J.382 method) connection channel bonding.
Fig. 8 is a diagram for explaining a configuration of a receiving side in the case of using a broadband tuner in connection channel bonding of the DVB-C2 standard (J.382 system).
Fig. 9 is a view for explaining the operation example 1 corresponding to the DVB-C2 standard.
10 is a table of data fields of the L1 signaling information used in the operation example 1. Fig.
11 is a diagram showing a configuration example of a transmission apparatus.
12 is a flowchart for explaining transmission processing corresponding to operation example 1. Fig.
13 is a flowchart for explaining a channel bonding transmission process corresponding to the operation example 1. Fig.
14 is a diagram showing an example of the structure of a receiving apparatus.
Fig. 15 is a flowchart for explaining the reception processing corresponding to the operation example 1. Fig.
16 is a flowchart for explaining the channel bonding reception processing corresponding to the operation example 1. Fig.
17 is a view for explaining channel bonding of the ATSC 3.0 standard.
18 is a view for explaining a normal mode corresponding to channel bonding of different channels.
19 is a diagram showing an example of the arrangement of L1 signaling information used in operation example 2. Fig.
20 is a view for explaining an extension mode 1 corresponding to a channel bonding of a connection two channels.
FIG. 21 is a view for explaining an extension mode 2 corresponding to channel bonding of connected three channels. FIG.
FIG. 22 is a view for explaining an extension mode 3 corresponding to channel bonding of 4 channels connected. FIG.
23 is a view for explaining the expansion mode 7 corresponding to the channel bonding of the connected 8 channels.
24 is a diagram of an exemplary bandwidth mode (BANDWIDTH_MODE).
Fig. 25 is a flowchart for explaining the channel bonding transmission processing corresponding to the operation example 2. Fig.
26 is a flowchart for explaining the channel bonding reception processing corresponding to the operation example 2. Fig.
27 is a diagram showing a configuration example of a computer.

Hereinafter, an embodiment according to the present technology will be described with reference to the drawings. The description will be given in the following order.

1. Configuration of the system

2. Overview of Channel Bonding

3. Description of channel bonding with this technology

(1) Operation example 1: Supports DVB-C2 standard

(2) Operation example 2: Compatible with ATSC3.0 standard

4. Computer Configuration

<1. System Configuration>

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the configuration of an embodiment of a transmission system to which the present technology is applied. Fig. The system shows a plurality of logically gathered devices.

In Fig. 1, the transmission system 1 includes a transmission apparatus 10 and a reception apparatus 20. Fig.

The transmission apparatus 10 transmits, for example, a TV program or the like. That is, the transmission apparatus 10 transmits a stream of data to be transmitted, such as video data and audio data, as TV programs, through the transmission path 30 as a digital broadcast signal. For example, transmission path 30 is a cable television network, terrestrial, and satellite channel.

The receiving apparatus 20 receives the digital broadcasting signal transmitted from the transmitting apparatus 10 through the transmission line 30, restores it to the original stream, and outputs it. For example, the receiving apparatus 20 outputs video data and audio data as TV programs.

The transmission system 1 shown in Fig. 1 is a DVB-T2 standard, a DVB-S2 standard, an integrated services digital broadcasting (ISDB), and the like, in addition to the digital broadcasting (data transmission) conforming to the DVB-C2 standard and the ATSC3.0 standard The present invention can be applied to digital broadcasts conforming to the standard, and other digital broadcasts.

<2. Overview of Channel Bonding>

(Common channel bonding)

Fig. 2 is a view for explaining general channel bonding.

2, in a general channel bonding, a channel having a bandwidth of 6 MHz transmits a divided stream 1 (a digital broadcasting signal RF1 including the same) divided from a single stream, and a different channel having a bandwidth of 6 MHz , And transmits the divided stream 2 (digital broadcast signal RF2 including the same) divided from the single stream. However, in each channel, a bandwidth of 5.71 MHz among the bandwidth of 6 MHz is used for data transmission. Also, the channels used in channel bonding need not be adjacent to each other. Channels between channels used in channel bonding may be used to transmit different digital broadcast signals that are independent of channel bonding.

Here, when the transmitting apparatus 10 transmits the digital broadcasting signals RF1 and RF2 including the divided streams by the general channel bonding, the receiving apparatus 20 receives, for example, a configuration as shown in Fig. 3 Respectively. That is, the receiving apparatus 20 includes an RF tuner unit 212 and a demodulator 213 provided therein. The number of RF tuner unit 212 and demodulator 213 depends on the number of channels through which a segmented stream is transmitted from a single stream. The RF tuner unit 212 and the demodulator 213 process the plurality of divided streams. 3, digital broadcast signals RF1 and RF2 including divided streams are transmitted from two channels. Therefore, the receiving apparatus 20 includes RF tuner units 212-1 and 212-2 provided therein and a demodulator 213-1 and 213-2. The RF tuner unit 212 can set a receivable frequency band in the frequency bands of, for example, 5 MHz, 6 MHz, 7 MHz, and 8 MHz.

In the receiving apparatus 20 of FIG. 3, the RF tuner unit 212-1 and the demodulator 213-1 perform processing to extract the divided stream 1 from the digital broadcast signal RF1. Further, the RF stream is processed by the RF tuner unit 212-2 and the demodulator 213-2 to extract the divided stream 2 from the digital broadcast signal RF2. The combining unit 214 combines the extracted divided streams 1 and 2, and restores (reconstructs) the original stream.

(Connection channel bonding of simple extension)

4 is a diagram illustrating connection channel bonding of a simple extension.

4, in the connection-channel bonding of the simple extension, the divided stream 1 (digital broadcast signal RF1 including the same thing) and the divided stream 2 (digital broadcast signal RF2 including the same thing) And is transmitted by a channel including a bandwidth of 6 MHz adjacent to each other. Further, in a channel adjacent to each other, a bandwidth of 5.71 MHz among the bandwidth of 6 MHz is used for data transmission. However, it is necessary to make effective use of the bandwidth of the portion of the guard band in the connection portion between the channels.

Here, when the transmitting apparatus 10 transmits the digital broadcasting signals RF1 and RF2 including the divided stream by the connection-channel bonding of the simple extension, the receiving apparatus 20 transmits, for example, As shown in Fig. 5, processing is performed by the RF tuner unit 212-1 and the demodulator 213-1, so that the digital broadcast signal RF1 is processed by the RF tuner unit 212-1 and the demodulator 213-1. Thus, in the reception apparatus 20 illustrated in FIG. 5, The divided stream 1 is extracted. Further, the processing is performed by the RF tuner unit 212-2 and the demodulator 213-2, thereby extracting the divided stream 2 from the digital broadcast signal RF2. The combining unit 214 combines the extracted divided streams 1 and 2, and restores (reconstructs) the original stream.

(Connection channel bonding of DVB-C2 standard (J.382 method))

6 is a view for explaining connection channel bonding of the DVB-C2 standard (J.382 scheme). The J.382 scheme is one of the next generation cable television transmission schemes.

In connection channel bonding of the above-described simple extension, it has been described that it is necessary to effectively utilize the bandwidth of the guard band portion in the connection portion between the channels. However, in the DVB-C2 standard (J.382 method), the data is transmitted in the connection portion between the channels as well. 6, in connection channel bonding (connected PLP bundling) of the DVB-C2 standard (J.382 method), data slice 0 divided from a physical layer pipe (PLP) as a divided stream and 1 (digital broadcast signals DS0 and DS1 including the same thing) are transmitted. For each of the channels adjacent to each other, a bandwidth of 5.71 MHz is used for data transmission among the bandwidth of 6 MHz. In the bandwidth of 0.295 MHz in the connection part between the channels, the data slice 2 (digital broadcast signal DS2 including the same thing) divided from a single stream (PLP) is transmitted as a divided stream.

Here, when the transmitting apparatus 10 transmits the digital broadcasting signals DS0, DS1, and DS2 including the data slice by the connection channel bonding of the DVB-C2 standard (J.382 system), the receiving apparatus 20 For example, has a configuration as shown in Fig. That is, the receiving apparatus 20 of FIG. 7 includes an RF tuner unit 212 and a demodulator 213 provided therein. The number of RF tuner unit 212 and demodulator 213 depends on the number of data slices as a segmented stream from a single stream. The RF tuner unit 212 and the demodulator 213 perform processing for a plurality of data slices. 7, digital broadcast signals DS0, DS1, and DS2 including three data slices are transmitted. Therefore, the receiving apparatus 20 is provided with RF tuner units 212-1, 212-2, and 212-3 And demodulators 213-1, 213-2, and 213-3 are provided.

7, the processing is performed by the RF tuner unit 212-1 and the demodulator 213-1, so that the data slice 0 is extracted from the digital broadcast signal DS0, The data slice 1 is extracted from the digital broadcast signal DS1 by performing processing by the demodulator 212-2 and the demodulator 213-2. Further, the processing is performed by the RF tuner unit 212-3 and the demodulator 213-3, thereby extracting the data slice 2 from the digital broadcast signal DS2. The combining unit 214 combines the extracted data slices 0 to 2, and the original stream is restored (reconstructed).

As described above, in connection channel bonding of the DVB-C2 standard (J.382 method), an increased frequency band (for example, a bandwidth of a connection part of a channel available by connecting channels) You can use it to transfer data slices. However, if the receiving apparatus 20 (FIG. 7) includes an RF tuner unit 212-3 provided internally for processing the transmitted data slice in a bandwidth that becomes available by connecting the channel, and a demodulator 213- 3). The reason for this is as follows. This is because, in the DVB-C2 standard (J.382 method), since the width of the frequency band of the data slice transmitted in each channel is limited, the data transmitted in the bandwidth that becomes available by connecting the channel to other data And it is difficult for the RF tuner unit 212-1 and the demodulator 213-1 and the RF tuner unit 212-2 and the demodulator 213-2 to perform processing. The maximum value (width) of the data slice is specified in "9.4.1.2 Maximum width of Data Slices" of Non-Patent Document 1 described above.

In the case where the RF tuner unit 212-3 and the demodulator 213-3 are added to the receiving apparatus 20 even though the bandwidth available by connecting the channels can be utilized effectively, Valid. However, this increases the cost of the receiving side. Therefore, it is desirable to be able to effectively utilize the bandwidth that is available by connecting the channels while suppressing the cost increase on the receiving side. 8, it is also conceivable to provide the receiver 20 with an RF broadband tuner unit 212 corresponding to a broadband frequency. However, in the end, there is a need to provide a demodulator 213-3 for performing processing on the transmitted data slice in the bandwidth that becomes available by connecting the channel. Therefore, this is not a fundamental solution.

Therefore, in the channel bonding using the present technology, channel bonding in which the bandwidth available by connecting the channels can be effectively utilized while suppressing an increase in cost on the reception side can be realized. Hereinafter, channel bonding to which the present technology is applied will be described concretely by exemplifying operation example 1 corresponding to the DVB-C2 standard and operation example 2 corresponding to the ATSC3.0 standard.

<3. Description of Channel Bonding Applying the Technology>

(1) Operation example 1

(Outline of PLP Bundling) Recently, digital broadcasting in which a high-resolution image such as 8K is transmitted is required. However, when an image of 8K resolution is encoded by using a HEVC (high efficiency video coding) method, the throughput necessary for data transmission at a high data rate obtained by the encoding is about 100Mbps. It is difficult for the PLP corresponding to such high data rate data to be transmitted as a single data slice.

Therefore, the DVB-C2 standard is standardized so that actual data as a single PLP is divided into BB (BaseBand) frame units by PLP bundling, which is one kind of channel bonding, and the actual data can be transmitted through a plurality of data slices. In the receiving apparatus 20, actual data as a single PLP is reconstructed by receiving a plurality of data slices transmitted from the transmission apparatus 10 and performing processing on the plurality of data slices.

In the DVB-C2 standard, a transmission band (frequency band) for transmitting an orthogonal frequency division multiplexing (OFDM) signal is divided, for example, by (approximately) 6 MHz units. Now, assume that a single transmission band divided by 6 MHz is a unit transmission band. In the receiving apparatus 20, an OFDM signal in a unit transmission band in which a data slice including a PLP of actual TV program data is transmitted is received, and processing is performed on the data slice included in the OFDM signal.

(Summary of Operation Example 1)

Fig. 9 is a view for explaining the operation example 1 corresponding to the DVB-C2 standard. 9, the left frequency band represents a channel to be subjected to PLP bundling corresponding to the current DVB-C2 standard (J.382 system), and the right frequency band corresponds to the operation example 1 to which the present technique is applied Indicates the channel to which the corresponding PLP is bundled

As shown by the left frequency band in Fig. 9, in the connection channel bonding of the current DVB-C2 standard (J.382 method), as described in Figs. 6 and 8, Can be effectively used to transmit the data slice. However, in the receiving apparatus 20, a demodulator 213-3 for performing processing on the data slice 2 (digital broadcasting signal DS2 including the same) transmitted in a bandwidth available by connecting the channels, (And the RF tuner unit 212-3). Therefore, it is effective on the transmission side. However, this causes an increase in cost to the receiving side as described above.

On the other hand, in the operation example 1 to which the present technology is applied, the restriction of the frequency band width of the data slice transmitted in each channel is released, and the maximum value (width) thereof becomes variable. This makes it possible to effectively utilize the bandwidth available by connecting the channels, and to suppress the cost increase on the receiving side. That is, in the connection channel bonding (connection PLP bundling) of the current DVB-C2 standard (J.382 scheme), since a bandwidth of 5.71 MHz among the bandwidth of 6 MHz is used for data transmission in each channel, By connecting, a bandwidth of 0.295 MHz becomes available. However, in the operation example 1 to which this technology is applied, the maximum value (width) of the data slice is variable, and a bandwidth of 5.86 MHz (5.71 MHz + 0.15 MHz (0.295 / 2 MHz) Can be used.

That is, in operation example 1 to which the present technology is applied, the maximum value (width) of the data slice transmitted in each channel is variable, and the maximum value of data that can be transmitted in each data slice can be set, It can be said that the data transmitted to the data slice 2 in the connection channel bonding (Fig. 6 and Fig. 8) of the current DVB-C2 standard (J.382 scheme) is distributed to the data slices 0 and 1.

In operation example 1 to which this technology is applied, at least one of the version information and the extension mode is used in order to release (slightly alleviate) the restriction of the frequency band width of the data slice transmitted from each channel and to vary the maximum value Is defined. That is, version information for managing the maximum value (width) of the data slice transmitted in each channel is defined. For example, when the version indicated by this version information is updated, by changing the maximum value (width) of the data slice from 3408 (OFDM carrier) to 3496 (OFDM carrier) Thereby allowing the data transmitted in the frequency band that becomes available by connecting the channels to be distributed to data slices 0 and 1.

Also, an extended mode indicating the change of the maximum value (width) of the data slice is defined. For example, when the extended mode is not set, that is, in the normal mode, the maximum value (width) of the data slice is 3408 (OFDM carrier). On the other hand, when the extended mode is set, the data transmitted in the frequency band which becomes available by connecting the channel is released to the data slice 0 and the data slice 040 by releasing the limitation (3408 (OFDM carrier)) of the maximum value 1 &lt; / RTI &gt;

Here, the version information and the extension mode can be defined as L1 signaling information which is transmission control information including information related to, for example, OFDM parameters, data slice, PLP, and notch bands. That is, the version information and the extension mode can be defined as L1 signaling information used in the current DVB-C2 standard (J.382 scheme).

(Structure of L1 signaling information)

10 is a table of data fields of the L1 signaling information used in the operation example 1. Fig.

The 16-bit NETWORK_ID indicates the network ID uniquely identifying the current network. The 16-bit C2_SYSTEM_ID indicates the C2 system ID uniquely identifying the C2 system in the network identified according to the network ID.

The 24-bit START_FREQUENCY indicates the start frequency of the current C2 system as a distance from 0 Hz and has an unsigned int value as an integral multiple of the carrier interval of the current C2 system. The 16-bit C2_BANDWIDTH indicates the bandwidth of the current C2 system.

The 2-bit GUARD_INTERVAL indicates the guard interval of the current C2 frame. The 10-bit C2_FRAME_LENGTH indicates the number of data symbols for each C2 frame. The 8-bit L1_PART2_CHANGE_COUNTER indicates the number of C2 frames preceding the location where the configuration changes.

The 8-bit NUM_DSLICE indicates the number of data slices transmitted in the current C2 frame. The 4-bit NUM_NOTCH indicates the number of notch bands.

In the data slice loop according to the number of data slices, the following fields are arranged. The 8-bit DSLICE_ID indicates a data slice ID uniquely identifying a data slice in the C2 system. The 13-bit or 14-bit DSLICE_TUNE_POS indicates the tuning position of the data slice as a relative value of START_FREQUENCY.

The 8-bit or 9-bit DSLICE_OFFSET_LEFT indicates the start position of the associated data slice as the distance from the tuning position to the left. The 8-bit or 9-bit DSLICE_OFFSET_RIGHT indicates the start position of the associated data slice as a distance from the tuning position to the right. When the extended mode is set as the EXTENDED_DS in the reserved area 2 to be described later, the maximum value (width) of the data slice is set according to DSLICE_OFFSET_LEFT and DSLICE_OFFSET_RIGHT.

The 2-bit DSLICE_TI_DEPTH indicates the depth of time interleaving in the associated data slice. The 1-bit DSLICE_TYPE indicates the type of the associated data slice. When DSLICE_TYPE is "1 ", one bit of FEC_HEADER_TYPE is placed. FEC_HEADER_TYPE indicates the type of the FEC frame header in the associated data slice.

The 1-bit DSLICE_CONST_CONF indicates that the configuration of the associated data slice is variable or fixed. If the value of this field is set to "1 ", the configuration of the associated data slice does not change. When the value of this field is not set to "1 ", it is set to" 0 ".

A 1-bit DSLICE_LEFT_NOTCH indicates the presence of a notch band adjacent to the left of the associated data field. If there is a notch band adjacent to the start position of the associated data slice, the value of this field is set to "1 ". When there is no notch band, it is set to "0 ".

The 8-bit DSLICE_NUM_PLP indicates the number of PLPs transmitted in the associated data slice. In the PLP loop according to the number of PLPs, the following fields are arranged. The 8-bit PLP_ID indicates a PLP ID for identifying the PLP in the C2 system. The 1-bit PLP_BUNDLED is PLP bundle information, which indicates whether the associated PLP is bundled in the current C2 system. When an associated PLP is bundled, the value of this field is set to "1 ". If the associated PLP is not bundled, it is set to "0 ".

The 2-bit PLP_TYPE indicates the type of the associated PLP. The 5-bit PLP_PAYLOAD_TYPE indicates the type of payload data transmitted by the associated PLP. When PLP_TYPE is "00" or "01 ", 8-bit PLP_GROUP_ID is arranged. The PLP_GROUP_ID indicates the PLP group ID that identifies the PLP group to which the current PLP is associated in the C2 system.

When the DSLICE_TYPE is "0", 14-bit PLP_START, 1-bit PLP_FEC_TYPE, 3-bit PLP_MOD, and 3-bit PLP_COD are arranged. PLP_START indicates the start position of the first complete XFEC frame of the associated PLP in the current C2 frame. The PLP_FEC_TYPE indicates the FEC type used in the associated PLP. The PLP_MOD indicates the modulation scheme used in the associated PLP. PLP_COD indicates the coding rate used in the associated PLP.

The 1-bit PSI / SI_REPROCESSING indicates whether the PSI / SI re-process is to be executed. When PSI / SI_REPROCESSING is "0 ", 16-bit transport_stream_id and 16-bit original_network_id are arranged. The transport_stream_id indicates a transport stream ID functioning as a label for identifying a transport stream (TS) from another multiplex in the distribution system. The original_network_id indicates the original network ID functioning as a label for identifying the network ID of the original distribution system.

Within the PLP loop, 8-bit RESERVED_1 is placed. RESERVED_1 is a reserved area 1 reserved for future use. Also, in the data slice loop, RESERVED_2 of 8 bits is arranged. RESERVED_2 is a reserved area 2 reserved for future use. However, the extended mode can be defined by placing EXTENDED_DS of 1 bit in RESERVED_2 of 8 bits and reserved region (2) of remaining 7 bits. For example, if the maximum value (width) of the data slice indicates a change, the value of this field is set to "1 ". If the maximum value is not changed, the value is set to "0 ".

In the notch loop according to the number of notch bands, the following fields are arranged. The 13-bit or 14-bit NOTCH_START indicates the start position of the associated notch band as a relative value of START_FREQUENCY as unsigned int. An 8-bit or 9-bit NOTCH_WIDTH indicates the width of the associated notch band as unsigned int. In the notch loop, 8 bits of RESERVED_3 are arranged. RESERVED_3 is a reserved area 3 reserved for future use.

One bit of RESERVED_TONE indicates whether or not some of the carriers are reserved. If there is a reserved carrier in the current C2 frame, "1 " is set to this bit. When there is no reserved carrier, it is set to "0 ". The 16-bit RESERVED_4 is a reserved area 4 reserved for future use. However, version information can be defined by arranging 4 bits of C2_VERSION in the 16-bit RESERVED_4 and making the remaining 12 bits into the reserved area 4. For example, if the maximum value (width) of the data slice can be changed, the version corresponding to the value of this field is updated.

Next, the details of the processing executed by the transmitting apparatus 10 and the receiving apparatus 20 included in the transmission system 1 when Operation Example 1 is adopted will be described. First, the transmission side will be described first, and then the reception side will be described.

(Configuration of transmission apparatus)

11 is a diagram showing a configuration example of the transmission apparatus 10 of Fig.

The transmitting apparatus 10 can divide real data as a single PLP (PLP to which the same PLP ID is assigned) by BB frame unit by PLP bundling, which is one kind of channel bonding, and transmit the divided data to a plurality of data slices . 11, the transmission apparatus 10 includes a control unit 111, an input processing unit 112, data slice processing units 113-1 to 113-N (N is an integer of 1 or more), a frame construction unit 114, and a transmission unit 115.

The control unit 111 controls the operation of each unit of the transfer apparatus 10.

The input processing unit 112 is supplied with actual data (target data such as a TS (transport stream)) as a PLP having the same PLP ID. The input processing unit 112 forms a BB frame by adding a BB (BaseBand) header to the actual data supplied thereto. The BB header is an input stream synchronizer (ISSY), which includes an input stream time reference (ISCR).

The input processing unit 112 repeats the BB stream including the BB frame to be divided and distributes each BB frame included in the BB stream to a single data slice among the plurality of data slices. Therefore, the input processing unit 112 divides the BB stream into a plurality of divided streams in units of BB frames. Further, the input processing unit 112 distributes the plurality of divided streams obtained by dividing the BB stream to any one of the data slice processing units 113-1 to 113-N.

The data slice processing unit 113-1 performs processing on the divided stream distributed by the input processing unit 112. [ For example, the data slice processing unit 113-1 performs error correction coding on the BB frame included in the divided frame, and outputs the FEC frame obtained as a result of the error correction coding to a predetermined bit unit as a symbol in advance And maps to signal points on the determined constellation. The data slice processing unit 113-1 forms a data slice packet by adding an FEC frame header to the FEC frame obtained by extracting the symbol as the mapping result in FEC frame units.

Further, the data slice processing unit 113-1 forms a data slice from one or more data slice packets and interleaves the data slice in the time direction and the frequency direction. The data slice processing unit 113-1 then supplies the interleaved data slice to the frame construction unit 114. [ Similarly to the data slice processing unit 113-1, the data slice processing units 113-2 to 113-N perform processing on the divided streams distributed by the input processing unit 112, And supplies the data slice to the frame construction unit 114. [

The frame composing unit 114 is supplied with one or more data slices from the data slice processing units 113-1 to 113-N. The frame construction unit 114 constructs a C2 frame including one or more data slices from the data slice processing units 113-1 to 113-N and supplies it to the transmission unit 115. [ The transmission unit 115 performs inverse fast Fourier transform (IFFT) on the C2 frame supplied from the frame construction unit 114 and performs digital-to-analog conversion on the OFDM signal obtained by the inverse fast Fourier transform (IFFT) conversion. The transmission unit 115 modulates an OFDM signal converted from a digital signal into an analog signal into an RF (radio frequency) signal and transmits it as a digital broadcast signal through the transmission path 30. [

The control unit 111 also includes a channel bonding setting unit 151 and a transmission control information generating unit 152. [ When operation example 1 is adopted as the operation mode of the channel bonding (PLP bundling), the channel bonding setting unit 151 releases the restriction of the frequency band width of the data slice transmitted in each channel, (Version information and expansion mode) is set in order to make the width (width) variable. Then, the channel bonding setting unit 151 supplies the setting contents to the transmission control information generating unit 152. [

The transmission control information generation unit 152 generates transmission control information such as L1 signaling information based on the setting contents supplied from the channel bonding setting unit 151 and supplies the transmission control information to the frame construction unit 114 or the like. Therefore, for example, when composing a C2 frame, the frame construction unit 114 can add transmission control information such as L1 signaling information.

In the configuration of the transmission apparatus 10 of Fig. 11, for convenience of explanation, blocks not related to channel bonding such as PLP bundling are appropriately omitted.

(Transmission processing)

Next, with reference to the flowchart of Fig. 12, the procedure of transfer processing corresponding to operation example 1 executed by the transfer apparatus 10 of Fig. 1 will be described.

In step S101, the control unit 111 performs channel bonding transmission processing. In this channel bonding transmission process, transmission control information such as L1 signaling information is generated in accordance with an operating mode (for example, operation example 1) of channel bonding (PLP bundling). The details of the channel bonding transmission processing will be described later with reference to the flowchart of Fig.

In step S102, the input processing unit 112 to the transfer unit 115 perform transfer processing under the control of the control unit 111. [ In this transmission process, for example, a plurality of data slices obtained by dividing a single PLP, and transmission control information such as L1 signaling information are transmitted as digital broadcasting signals through the transmission line 30. [ When the process of step S102 is completed, the transfer process of Fig. 12 ends.

The transmission processing has been described above.

(Channel bonding transmission processing)

Here, the details of the channel bonding transmission process corresponding to the operation example 1 in the process of step S101 of Fig. 12 will be described with reference to the flowchart of Fig.

In step S111, it is determined whether or not the operation mode of channel bonding (PLP bundling) is operation example 1. If it is determined in step S111 that the operation mode is operation example 1, the procedure proceeds to step S112.

In step S112, the channel bonding setting unit 151 sets the version information and the extension mode that allow the change of the maximum value (width) of the data slice that is the object of the PLP bundling. In this case, for example, by setting at least one of the version information and the extension mode, the restriction of the frequency band width of the data slice is released, and then the maximum value (width) thereof can be changed.

In step S113, the transmission control information generating unit 152 generates L1 signaling information based on the setting contents of the process in step S112.

On the other hand, if it is determined in step S111 that the operation mode is not the operation example 1, the procedure proceeds to step S114. In step S114, for example, the channel bonding setting unit 151 sets a normal PLP bundling setting process for transmitting a data slice having a normal maximum value (width) (for example, 3408 (OFDM carrier)) And so on. Therefore, L1 signaling information corresponding to normal PLP bundling is generated (S113).

When the processing in step S113 ends, the procedure returns to the processing in step S101 in Fig. 12, and subsequent procedures are executed.

The channel bonding transmission processing corresponding to the operation example 1 has been described above.

(Structure of receiving apparatus)

14 is a diagram showing a configuration example of the reception apparatus 20 of FIG.

The receiving apparatus 20 can reconstruct (restore) the actual data transmitted by distributing a single PLP to a plurality of data slices by PLP bundling. 14, the receiving apparatus 20 includes a control unit 211, RF tuner units 212-1 to 212-N (N is an integer of 1 or more), demodulators 213-1 to 213-N (N And an integrating unit 214. The combining unit 214 includes a combining unit 214,

The control unit 211 controls the operation of each unit of the receiving apparatus 20.

The RF tuner unit 212-1 receives the RF signal of the predetermined band transmitted through the transmission line 30 as a digital broadcast signal from the transmission apparatus 10 and supplies it to the demodulator 213-1 do. The demodulator 213-1 demodulates the RF signal from the RF tuner unit 212-1 and performs AD conversion (analog to digital conversion) on the demodulated signal (OFDM signal) obtained by the demodulation. The demodulator 213-1 performs FFT (fast Fourier transform) on the demodulated signal converted from the analog signal into the digital signal, and extracts the data slice obtained by the FFT.

The demodulator 213-1 also decomposes the data slice into data slice packets and removes the FEC frame header from the data slice packet. Thus, the data slice packet is decomposed into FEC frames. Based on the removed FEC frame header, the modulation scheme, the code length, and the like of the FEC frame are recognized, and de-mapping and decoding of error correction are performed. The demodulator 213-1 demaps the FEC frame (the same symbol) and decodes the error correction code for the demapped FEC frame, thereby restoring the divided stream including the BB frame.

The demodulator 213-1 supplies a reconstructed segment stream (BB frame included therein) recovered from the data slice to a buffer (not shown) provided in the synthesis unit 214. [ This buffer includes, for example, a first in first out (FIFO) memory, and sequentially stores a divided stream (BB frames included therein) supplied from the demodulator 213-1. In the demodulators 213-2 to 213-N, similarly to the demodulator 213-1, a data slice is extracted based on the RF signals supplied from the RF tuner units 212-2 to 212-N A process for restoring the segmented stream is performed and the segmented stream restored from the data slice (the BB frame contained therein) is sequentially stored in the buffer provided in the synthesis unit 214. [

Based on the ISSY (ISCR) included in the BB header added to the BB frame contained in the plurality of divided streams stored in the buffer provided in the combining unit 214, the combining unit 214 combines the BB The BB frame is read out from the buffer in the order of frames, and the original BB stream is reconstructed (restored) by rearranging the BB frames. Further, the combining unit 214 decomposes the BB frame included in the original BB stream, restores the actual data (target data such as TS), and outputs the restored data.

The control unit 211 also includes a transmission control information acquisition unit 251 and a channel bonding control unit 252. [ The transmission control information obtaining unit 251 obtains transmission control information such as L1 signaling information obtained by performing channel scanning by the RF tuner unit 212 and the demodulator 213 and transmits the transmission control information to the channel bonding control unit 252 Supply.

The channel bonding control unit 252 performs channel bonding (PLP bundling) of the demodulator 213, the combining unit 214, and the like based on the transmission control information such as the L1 signaling information supplied from the transmission control information acquisition unit 251, And controls the operation of each unit configured to perform the processing related to each unit.

(Reception processing)

Next, with reference to the flowchart of Fig. 15, the procedure of the reception processing corresponding to operation example 1 executed by the reception apparatus 20 of Fig. 1 will be described.

In step S201, the RF tuner unit 212 and the demodulator 213 perform reception processing under the control of the control unit 211. [ In this reception processing, a digital broadcast signal is received from the transmission apparatus 10 through the transmission line 30, and a process such as channel scanning is performed.

In step S202, the demodulator 213 and the combining unit 214 perform channel bonding reception processing under the control of the control unit 211. [ In this channel bonding reception processing, processing according to an operation mode (for example, operation example 1) of channel bonding (PLP bundling) is performed based on transmission control information such as L1 signaling information and the like, PLP is reconstructed. The details of the channel bonding reception processing will be described later with reference to the flowchart of Fig. When the processing in step S202 is completed, the receiving processing in Fig. 15 ends.

The receiving process has been described above.

(Channel bonding reception processing)

Here, the details of the channel bonding reception processing corresponding to the operation example 1 in the processing in step S202 of Fig. 15 will be described with reference to the flowchart of Fig.

In step S211, the transmission control information acquisition unit 251 acquires the L1 signaling information obtained by channel scanning by the RF tuner unit 212 and the demodulator 213. [ Here, for example, channel scanning is performed for all frequency bands, and L1 signaling information is acquired for each channel.

In step S212, the channel bonding control unit 252 determines, based on the L1 signaling information acquired by the process in step S211, version information that allows the change of the maximum value (width) of the data slice that is the object of PLP bundling It is determined whether or not the extension mode is set.

If it is determined that the condition at step S212 is satisfied, the procedure goes to step S213. In step S213, the channel bonding control unit 252 controls the demodulator 213, the combining unit 214, and the like, and performs the PLP bundling process according to the change of the maximum value (width) of the data slice. In this case, for example, at least one of the version information and the extension mode is set so that the restriction of the frequency band width of the data slice is released and the maximum value (width) thereof is changed (for example, 3408 (OFDM carrier) To 3496 (OFDM carrier)). Thus, a single PLP is reconstructed from the data slices 0 and 1 containing the data transmitted in the frequency band becoming available by connecting the channels.

On the other hand, if it is determined that the condition at step S212 is not satisfied, the procedure goes to step S214. In step S214, the channel bonding control unit 252 controls the demodulator 213, the combining unit 214, and the like so that the maximum value (width) (for example, 3408 (OFDM carrier) Lt; RTI ID = 0.0 &gt; PLP &lt; / RTI &gt;

When the processing in step S213 or step S214 ends, the procedure returns to the processing in step S202 in Fig. 15, and subsequent processing is executed.

The channel bonding reception processing corresponding to operation example 1 has been described above.

As described above, in the operation example 1 corresponding to the DVB-C2 standard, by defining the version information (C2_VERSION) and the extension mode (EXTENDED_DS) as the connection channel information, the limitation of the frequency band width of the data slice transmitted on each channel It can be released (slightly relaxed) and its maximum value (width) can be changed. Therefore, the data can be transmitted in the frequency band that is available by connecting the channels without separately providing the RF tuner unit 212, demodulator 213, or the like in the receiving apparatus 20. [ Therefore, it is possible to effectively utilize the frequency band while suppressing the cost increase of the receiving apparatus 20. [

(2) Operation example 2

(Outline of Channel Bonding of ATSC 3.0 Specification) FIG. 17 is a view for explaining channel bonding of the ATSC 3.0 standard.

In the ATSC3.0 standard currently under preparation, the adoption of channel bonding is expected. In the channel bonding of the ATSC 3.0 standard, actual data as a single PLP can be divided into units of BB frames, and can be transmitted by a plurality of data slices. In the receiving apparatus 20, actual data as a single PLP is reconstructed by receiving a plurality of data slices transmitted from the transmission apparatus 10 and performing processing on the plurality of data slices.

17, in the channel bonding of the ATSC 3.0 standard, a channel having a bandwidth of 6 MHz transmits a data slice 0 (digital broadcast signal DS0 including the same) divided from a single PLP (PLP1) A different channel having a bandwidth of 1 transmits the data slice 1 (digital broadcast signal DS1 including the same). However, for each channel, a bandwidth of 5.71 MHz among the bandwidth of 6 MHz is used for data transmission. In addition, the channels used for channel bonding need not be adjacent to each other. Channels between channels used for channel bonding may be used to transmit different digital broadcast signals that are independent of channel bonding. In Fig. 17, a digital broadcast signal corresponding to the current ATSC 1.0 standard is transmitted through three channels between channels through which a data slice is transmitted.

Here, when the transmitting apparatus 10 transmits digital broadcasting signals DS0 and DS1 including a plurality of data slices, the receiving apparatus 20 is provided with an RF tuner unit 212 and a demodulator 213 , Processing for a plurality of data slices is performed. The number of the RF tuner unit 212 and the demodulator 213 depends on the number of channels through which the divided data slice is transmitted from a single PLP (PLP1). 17, since the data slice 0 (the digital broadcast signal DS0 including the same thing) and the data slice 1 (the digital broadcast signal DS1 including the same thing) are transmitted in the two channels, the reception device 20 , RF tuner units 212-1 and 212-2 and demodulators 213-1 and 213-2 are provided. The RF tuner unit 212 can set a frequency band that can be received, for example, in the frequency bands of 5 MHz, 6 MHz, 7 MHz, and 8 MHz.

In the receiving apparatus 20, the RF slot 0 is extracted from the digital broadcast signal DS0 by performing processing by the RF tuner unit 212-1 and the demodulator 213-1. Further, by performing the processing by the RF tuner unit 212-2 and the demodulator 213-2, the data slice 1 is extracted from the digital broadcast signal DS1. The combining unit 214 combines the extracted data slices 0 and 1 to restore (reconstruct) the original PLP (PLP1).

18, the data slice 0 (the digital broadcast signal DS0 including the same thing) and the data slice 1 (digital broadcast signal DS1 including the same) divided from the single PLP PLP1 May be transmitted by a channel having a bandwidth of 6 MHz adjacent to each other. In this case, in the adjacent channel, a bandwidth of 5.71 MHz is used for data transmission. However, the bandwidth of the connection portion between the channels is not effectively utilized. Accordingly, in the ATSC 3.0 standard, as in the case of the DVB-C2 standard (J.382 method) described above, channels for transmitting data slices are connected and channels are connected to each other in an increased frequency band (for example, It is possible to effectively utilize the frequency band that becomes available by connecting the channel without providing the RF tuner unit 212 and the demodulator 213 for performing processing on the data slice transmitted in the channel There is a need.

In operation example 2 to which the present technology is applied, an RF tuner unit 212 for defining a bandwidth mode (BANDWIDTH_MODE) and performing processing on a data slice transmitted in a frequency band that becomes available by connecting a channel, and a demodulator 213 ), It is possible to effectively utilize the increased frequency band by connecting the channels. That is, in the operation example 2 to which the present technology is applied, the frequency band width of the data slice transmitted in each channel is not set to a fixed value, but the bandwidth mode (the frequency band width) of the RF tuner unit 212, the demodulator 213, BANDWIDTH_MODE), thereby making it possible to effectively utilize the bandwidth available by connecting the channels.

Here, for example, the bandwidth mode (BANDWIDTH_MODE) may be defined as L1 signaling information which is transmission control information. As shown in Fig. 19, the physical layer frame (ATSC Physical Frame) of the layer 1 includes a preamble and data (Payload). For example, a bandwidth mode can be defined by placing 3 bits of BANDWIDTH_MODE in the L1 signaling information allocated in this preamble.

Here, as in the case of the operation example 1 described above, the frequency band width of the data slice transmitted in each channel can be set. Finally, the number of available data slices varies depending on the configuration of the RF tuner unit 212, the demodulator 213, and the like in the reception apparatus 20. [ Therefore, the bandwidth mode (BANDWIDTH_MODE) is included in the transmission control information such as the L1 signaling information, and does not need to be transmitted from the transmission device 10 to the reception device 20. [ That is, the receiving apparatus 20 can determine the bandwidth mode (BANDWIDTH_MODE) according to the configuration of the RF tuner unit 212, the demodulator 213, and the like, and can operate in the bandwidth mode.

As the bandwidth mode (BANDWIDTH_MODE), there are a regular mode in which the channels for transmitting the plurality of data slices shown in FIG. 17 and FIG. 18 are not connected to each other, and channels for transmitting the plurality of data slices are connected to each other There is an extended mode. As the extended mode, a plurality of extension modes can be set according to the number of channels connected to each other. Therefore, an expansion mode according to the number of channel connections will be described below.

(Extended mode 1)

20 is a view for explaining an expansion mode 1 corresponding to channel bonding of two channels of connection.

20, the receiving apparatus 20 is provided with RF tuner units 212-1 and 212-2 and demodulators 213-1 and 213-2. In this case, the receiving apparatus 20 receives the data slice 0 (the digital broadcasting signal DS0 including the same) and the data slice 1 (the digital broadcasting signal including the same one) transmitted from the transmitting apparatus 10 on the two channels, (DS1)).

By setting the extension mode 1 (BANDWIDTH_MODE = "1") in order to make the frequency band increased by the connection 2 channel when two channels are connected, a bandwidth of 5.86 MHz is transmitted for data transmission . That is, by using a bandwidth of 11.72 MHz (2 x 5.86 MHz) for data transmission in the two connected channels having a bandwidth of 12 MHz, compared with the case of the normal mode (11.42 MHz (2 x 5.71 MHz) It is possible to effectively use the increased frequency band.

In the receiving apparatus 20, the RF slot 0 is extracted from the digital broadcast signal DS0 by performing processing by the RF tuner unit 212-1 and the demodulator 213-1. Further, by performing the processing by the RF tuner unit 212-2 and the demodulator 213-2, the data slice 1 is extracted from the digital broadcast signal DS1. In this case, since the extension mode 1 is set in the receiving apparatus 20, the RF tuner unit 212-3 and the demodulator 213-3 for corresponding to the frequency band increased by, for example, 3), and can process data according to the frequency band increased by the connection two channels.

(Extended mode 2)

Fig. 21 is a diagram for explaining the expansion mode 2 corresponding to the channel bonding of the connection three channels. Fig.

In Fig. 21, the receiving apparatus 20 is provided with RF tuner units 212-1 to 212-3 and demodulators 213-1 to 213-3. In this case, the receiving apparatus 20 receives the data slice 0 (the digital broadcasting signal DS0 including the same), the data slice 1 (the digital broadcasting signal including the same one) transmitted from the transmitting apparatus 10 on the three channels, (DS1)), and a data slice 2 (digital broadcast signal DS2 including the same).

By setting the extended mode 2 (BANDWIDTH_MODE = "2") in order to make the increased frequency band available by the three connected channels when three channels are connected to each other, Lt; / RTI &gt; That is, by using a bandwidth of 17.70 MHz (3 x 5.90 MHz) for three channels of connection with a bandwidth of 18 MHz, It is possible to effectively use the increased frequency band.

The receiving apparatus 20 extracts data slice 0 from the digital broadcasting signal DS0 by processing by the RF tuner unit 212-1 and the demodulator 213-1 and outputs the data slice 0 to the RF tuner unit 212- 2) and the demodulator 213-2, thereby extracting the data slice 1 from the digital broadcast signal DS1. Further, the RF slice 2 is extracted from the digital broadcast signal DS2 by performing processing by the RF tuner unit 212-3 and the demodulator 213-3. In this case, since the extension mode 2 is set in the receiving apparatus 20, for example, the RF tuner unit 212-4 and the demodulator 213-4, which correspond to the frequency band increased by the three connected channels, -4), and can process the data according to the frequency band increased by the connection three channels.

(Extended mode 3)

22 is a diagram for explaining an expansion mode 3 corresponding to channel bonding of four channels for connection.

22, the receiving apparatus 20 is provided with RF tuner units 212-1 to 212-4 and demodulators 213-1 to 213-4. In this case, the receiving apparatus 20 receives the data slice 0 (the digital broadcast signal DS0 including the same), the data slice 1 (the digital broadcast signal including the same one) transmitted from the transmitting apparatus 10 on the four channels, (The digital broadcast signal DS2 including the same thing), and the data slice 3 (the digital broadcast signal DS3 including the same thing).

By setting the extension mode 3 (BANDWIDTH_MODE = "3"), in order to make the increased frequency band available by the connected four channels when the four channels are connected to each other, Lt; / RTI &gt; That is, by using a bandwidth of 23.72 MHz (4 x 5.93 MHz) for data transmission in four connected channels having a bandwidth of 24 MHz, compared with the case of the normal mode (22.84 MHz (4 x 5.71 MHz) It is possible to effectively use the increased frequency band.

In the receiving apparatus 20, the data slice 0 is extracted from the digital broadcast signal DS0 by the RF tuner unit 212-1 and the demodulator 213-1, and the RF tuner unit 212-2 and demodulator The data slice 1 is extracted from the digital broadcast signal DS1. Further, the data slice 2 is extracted from the digital broadcast signal DS2 by the RF tuner unit 212-3 and the demodulator 213-3, and the data slice 2 is extracted by the RF tuner unit 212-4 and the demodulator 213-4 The data slice 3 is extracted from the digital broadcast signal DS3. In this case, since the extended mode 3 is set in the receiving apparatus 20, the RF tuner unit 212-5 and the demodulator 213-5, which correspond to the frequency band increased by the four connected channels, -5), and can process the data according to the frequency band increased by the connected four channels.

(Extended mode 7)

23 is a view for explaining an expansion mode 7 corresponding to channel bonding of 8 channels connected.

For extension modes 4 through 7, the number of pairs of RF tuner unit 212 and demodulator 213 provided to the receiving device 20 is increased from 5 to 8, and the number of data slices that can be handled is increased. Basically, the extension modes 4 to 7 are similar to the extension modes 1 to 3 described above. Therefore, the extended mode 7 will be described in place of the extended modes 4 to 7.

23, the receiving apparatus 20 is provided with RF tuner units 212-1 to 212-8 and demodulators 213-1 to 213-8. In this case, the receiving apparatus 20 receives the data slice 0 (the digital broadcast signal DS0 including the same) and the data slice 7 (the digital broadcast signal including the same one) transmitted from the transmitting apparatus 10 on eight channels (DS7)).

By setting the extended mode 7 (BANDWIDTH_MODE = "7") to enable the increased frequency band by the eight connected channels when eight channels are connected, a bandwidth of 5.96 MHz for each channel Lt; / RTI &gt; That is, the bandwidth of 47.68 MHz (8 x 5.96 MHz) is used for data transmission in eight channels connected with a bandwidth of 48 MHz, and compared with the case of the normal mode (45.68 MHz (8 x 5.71 MHz) It is possible to effectively use the increased frequency band.

In the receiving apparatus 20, the data slice 0 is extracted from the digital broadcast signal DS0 by the RF tuner unit 212-1 and the demodulator 213-1, and the RF tuner unit 212-2 and demodulator The data slice 1 is extracted from the digital broadcast signal DS1. Further, the data slice 2 is extracted from the digital broadcast signal DS2 by the RF tuner unit 212-3 and the demodulator 213-3, and the data slice 2 is extracted by the RF tuner unit 212-4 and the demodulator 213-4 The data slice 3 is extracted from the digital broadcast signal DS3.

In the receiving apparatus 20, the data slice 4 is extracted from the digital broadcast signal DS4 by the RF tuner unit 212-5 and the demodulator 213-5, The demodulator 213-6 extracts the data slice 5 from the digital broadcast signal DS5. The data slice 6 is extracted from the digital broadcast signal DS6 by the RF tuner unit 212-7 and the demodulator 213-7 and is demodulated by the RF tuner unit 212-8 and the demodulator 213- The data slice 7 is extracted from the signal DS7.

In this case, since the extension mode 7 is set in the receiving apparatus 20, for example, the RF tuner unit 212-9 for coping with the frequency band increased by the connected eight channels and the demodulator 213 -9), and can process data according to the frequency band increased by the connected eight channels.

As described above, the bandwidth mode (BANDWIDTH_MODE) is set according to the configuration of the receiving apparatus 20 (the number of pairs of the RF tuner unit 212 and the demodulator 213). However, if the frequency band of each channel exceeds 6 MHz, for example, it is necessary to use the RF tuner unit 212 corresponding to the frequency band of 7 MHz. Thus, in this example, the extended modes 1 to 7 are defined as the extended mode of the bandwidth mode (BANDWIDTH_MODE), and the receiving apparatus 20 can correspond to the connected eight channels at maximum. 24, the above-described bandwidth mode (BANDWIDTH_MODE) is summarized.

The bandwidth mode (BANDWIDTH_MODE) may be transmitted together with the data slice by transmission control information such as L1 signaling information. Further, the receiving apparatus 20 can determine the bandwidth mode according to the configuration of the RF tuner unit 212, the demodulator 213, and the like, and can operate in the bandwidth mode. In the second operation example, as in the above-described operation example 1, the processing according to the increased frequency band can be managed by connecting the channels using the version information as well as the bandwidth mode (BANDWIDTH_MODE).

Next, the details of the processing executed by the transmission apparatus 10 and the reception apparatus 20 included in the transmission system 1 when Operation Example 2 is adopted will be described. The configuration of the transmission apparatus 10 and the reception apparatus 20 in the operation example 2 is similar to the operation example 1 described above, and a description thereof will be omitted.

(Transmission processing)

First, the procedure of transmission processing corresponding to operation example 2 executed by the transmission apparatus 10 will be described. The transmission process corresponding to the operation example 2 includes the content of the channel bonding transmission process of the step S101 which is different from the transmission process corresponding to the operation example 1 of Fig. Therefore, the channel bonding transmission processing corresponding to the operation example 2 will be described with reference to the flowchart of Fig.

(Channel bonding transmission processing)

25 is a flowchart for explaining the channel bonding transmission process corresponding to the operation example 2. Fig.

In step S131, it is determined whether or not the operation mode of channel bonding is operation example 2 (extension mode of the same). If it is determined in step S131 that the operation mode is operation example 2 (expansion mode of the same), the procedure proceeds to step S132.

In step S132, the channel bonding setting unit 151 sets a bandwidth mode (BANDWIDTH_MODE) according to the number of connection channels in channel bonding. In this case, for example, in the case of the connection 2 channel, the extension mode 1 (BANDWIDTH_MODE = "1") is set. In case of connection 3 channel, extension mode 2 (BANDWIDTH_MODE = "2") is set.

In step S133, the transmission control information generating unit 152 generates L1 signaling information based on the setting contents of the process in step S132.

On the other hand, if it is determined in step S131 that the operation mode is not operation example 2 (expansion mode of the same), the procedure goes to step S134. In step S134, for example, the channel bonding setting unit 151 sets a normal channel bonding setting process or the like for transmitting the data slice in the normal mode (BANDWIDTH_MODE = "0") as the bandwidth mode (BANDWIDTH_MODE) . Therefore, L1 signaling information corresponding to normal channel bonding is generated (S133).

When the processing in step S133 ends, the procedure returns to the processing in step S101 in Fig. 12, and subsequent procedures are executed.

The channel bonding transmission processing corresponding to the operation example 2 has been described above.

(Reception processing)

Next, the procedure of the reception processing corresponding to the operation example 2 executed by the reception apparatus 20 will be described. The reception processing corresponding to the operation example 2 has contents of the channel bonding reception processing in step S202, which is different from the reception processing corresponding to the operation example 1 in Fig. Therefore, the PLP bundling reception processing corresponding to the operation example 2 will be described with reference to the flowchart of Fig.

(Channel bonding reception processing)

26 is a flowchart for explaining the channel bonding reception processing corresponding to the operation example 2. Fig.

In step S231, the transmission control information obtaining unit 251 obtains the L1 signaling information obtained by channel scanning by the RF tuner unit 212 and the demodulator 213. [ In this case, for example, channel scanning is performed for all frequency bands, and L1 signaling information is acquired for each channel.

In step S232, on the basis of the L1 signaling information acquired in the process in step S231, the channel bonding control unit 252 sets the bandwidth mode (BANDWIDTH_MODE) corresponding to the number of connection channels in the channel bonding Extension mode) is set.

If it is determined in step S232 that the bandwidth mode (the same extended mode) as the number of connection channels is set, the procedure goes to step S233. In step S233, the channel bonding control unit 252 controls the demodulator 213, the combining unit 214, and the like, and performs channel bonding processing according to the number of connection channels according to the bandwidth mode (BANDWIDTH_MODE).

Here, for example, when the receiving apparatus 20 includes the RF tuner units 212-1 and 212-2 and the demodulators 213-1 and 213-2, the extended mode 1 (BANDWIDTH_MODE = "1 " ") Is set, a bandwidth of 5.86 MHz is used for data transmission in each channel in the connection 2 channel, and a single PLP (PLP1) is reconstructed from the data slices 0 and 1. Further, for example, when the receiving apparatus 20 includes the RF tuner units 212-1 to 212-3 and the demodulators 213-1 to 213-3, the extended mode 2 (BANDWIDTH_MODE = "2" ) Is set, a bandwidth of 5.90 MHz is used for data transmission in each channel in the connection three channels, and a single PLP (PLP1) is reconstructed from the data slices 0 to 2.

On the other hand, if it is determined in step S232 that the bandwidth mode (the same extended mode) as the number of connection channels is not set, the procedure goes to step S234. In this case, the normal mode (BANDWIDTH_MODE = "0") is set as the bandwidth mode (BANDWIDTH_MODE). In step S234, the channel bonding control unit 252 controls the demodulator 213, the combining unit 214, and the like, and performs normal channel bonding processing and the like on the data slice transmitted on the different channel, respectively.

When the processing in steps S233 and S234 is completed, the procedure returns to the processing in step S202 in Fig. 15, and the subsequent procedures are executed.

The channel bonding reception processing corresponding to the operation example 2 has been described above.

As described above, in the operation example 2 corresponding to the ATSC3.0 standard, by defining the bandwidth mode (BANDWIDTH_MODE) as the connection channel information, the configuration of the reception apparatus 20 (the pair of the RF tuner unit 212 and the demodulator 213 The data can be transmitted in a frequency band that is available depending on the number of connection channels determined according to the number of connection channels. Therefore, the data can be transmitted in the frequency band that is available by connecting the channels without separately providing the RF tuner unit 212, demodulator 213, or the like in the receiving apparatus 20. [ Therefore, it is possible to effectively utilize the frequency band while suppressing the cost increase of the receiving apparatus 20. [

<4. Computer Configuration>

The above-described series of processes may be executed by hardware and software. When a series of processes are executed by software, the programs included in the software are installed in the computer. 27 is a diagram showing a hardware configuration example of a computer for executing the above-described series of processes by a program.

In the computer 900, a central processing unit (CPU) 901, a read only memory (ROM) 902 and a random access memory (RAM) 903 are connected to each other by a bus 904. An input / output interface 905 is connected to the bus 904. An input unit 906, an output unit 907, a recording unit 908, a communication unit 909, and a drive 910 are connected to the input / output interface 905.

The input unit 906 includes a keyboard, a mouse, a microphone, and the like. The output unit 907 includes a display, a speaker, and the like. The recording unit 908 includes a hard disk, a nonvolatile memory, and the like. The communication unit 909 includes a network interface and the like. The drive 910 drives a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

In the computer 900 configured as described above, the CPU 901 loads the program stored in the ROM 902 and the recording unit 908 into the RAM 903 through the input / output interface 905 and the bus 904, . Thus, the series of processes described above is performed.

The program executed by the computer 900 (the CPU 901) can be provided by recording on a removable medium 911, for example, as a package medium or the like. In addition, the program may be provided via a wireless or wired transmission medium such as a local area network, the Internet, and digital satellite broadcasting.

In the computer 900, the program can be installed in the recording unit 908 via the input / output interface 905 by mounting the removable medium 911 on the drive 910. [ In addition, the program can be received by the communication unit 909 via a wired or wireless transmission medium, and installed in the recording unit 908. Further, the program may be installed in advance in the ROM 902 and the recording unit 908. [

Here, in the present specification, the processing performed by the computer in accordance with the program need not always be performed in time series according to the procedure described in the flowchart. That is, the processing performed by the computer in accordance with the program includes processing executed in parallel or individually (for example, parallel processing or processing by object). Further, the program can be executed by a single computer (processor), and the distributed processing of the program can be performed by a plurality of computers.

The embodiments of the present technology are not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention.

Further, the present technology can have the following configuration.

(One)

As a receiving apparatus,

A plurality of receivers configured to receive a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, into a plurality of data slices; And a processing circuit configured to reconstruct the BB stream from the plurality of segmented streams based on concatenated channel information, wherein the plurality of segmented streams are available by concatenating channels that transmit the plurality of data slices The data being transmitted in a frequency band in which the data is transmitted.

(2)

The receiving apparatus according to (1), wherein the connection channel information indicates a bandwidth mode according to the number of the channels to be connected.

(3)

Wherein the plurality of receivers are configured to receive the plurality of segmented streams according to the bandwidth mode and wherein the plurality of segmented streams comprise the data transmitted in the frequency band that becomes available when the channels are concatenated, (2).

(4)

The receiving apparatus according to any one of (1) to (3), wherein the connection channel information is included in transmission control information received together with the plurality of divided streams.

(5)

The connection channel information includes version information for managing a maximum value of data that can be transmitted by the data slice transmitted in each channel or version information for managing the maximum value of the transmittable data by the data slice transmitted in each channel (1) to (4), wherein the information includes at least one of extension mode information indicating whether the content is changed or not.

(6)

The connection channel information is included in the transmission control information received together with the plurality of divided streams, and when the extended mode information indicates that the maximum value of the transferable data by the data slice has changed, And the changed maximum value for the data transmittable by the slice is set in the transmission control information.

(7)

A receiving method of a receiving apparatus,

Receiving, by a plurality of receivers of the receiving apparatus, a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, into a plurality of data slices; And

And reconstructing the BB stream by the processing circuit of the receiving apparatus based on the connection channel information from the plurality of divided streams, wherein the plurality of divided streams include a channel for transmitting the plurality of data slices The data being transmitted in a frequency band that is made available by connecting the plurality of antennas to each other.

(8)

As a transmission device,

A plurality of data slices including data to be transmitted in a frequency band that is available by connecting channels for transmitting a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, A processing circuit configured to generate transmission control information including connection channel information for causing the receiving apparatus to receive the divided stream; And a transmitter configured to transmit the transmission control information together with the plurality of divided streams.

(9)

The transmission apparatus according to (8), wherein the connection channel information indicates a bandwidth mode according to the number of the channels to be connected.

(10)

(9), wherein the connection channel information indicates the bandwidth mode in which the receiver apparatus receives the plurality of divided streams including the data transmitted in the frequency band that becomes available when the channels are connected, Lt; / RTI &gt;

(11)

The connection channel information includes version information for managing a maximum value of data that can be transmitted by the data slice transmitted in each channel or version information for managing the maximum value of the transmittable data by the data slice transmitted in each channel (8) to (10), wherein the transmission mode information includes at least one of extension mode information indicating whether the transmission mode is changed or not.

(12)

When the extended mode information indicates that the maximum value of the transferable data by the data slice has been changed, the changed maximum value for the transferable data by the data slice is set in the transfer control information 11).

(13)

A transmission method of a transmission apparatus that transmits a plurality of divided streams obtained by dividing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, into a plurality of data slices, Generating, by the processing circuit, transmission control information including connection channel information for causing the receiving apparatus to receive the plurality of divided streams including the data; And transmitting, by the transmitter, the transmission control information together with the plurality of divided streams.

1 transmission system
10 transmission device
20 receiving apparatus
111 control unit
112 input processing unit
113 data slice processing unit
114 frame unit
115 transmission unit
151 Channel bonding setting unit
152 transmission control information generation unit
211 control unit
212 RF Tuner Unit
213 Demodulator
214 synthesis unit
251 Transmission control information acquisition unit
252 channel bonding control unit
900 computers
901 CPU

Claims (13)

As a receiving apparatus,
A plurality of receivers configured to receive a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, into a plurality of data slices; And
And a processing circuit configured to reconstruct the BB stream based on transmission control information from the plurality of divided streams,
Wherein the number of receivers is equal to the number of the plurality of divided streams,
When the channels for transmitting the respective divided streams are connected, the transmission control information includes a part of the frequency band between the channels that are available by connecting the channels, and a connection frequency Comprising: connection channel information for causing the divided streams transmitted on each channel formed in a band to be received by respective receivers,
And when the channels for transmitting the respective divided streams are concatenated, the processing circuit reconstructs the original BB stream from the plurality of divided streams based on the concatenated channel information. The method according to claim 1,
Wherein the connection channel information indicates a bandwidth mode according to the number of channels to be connected. 3. The method of claim 2,
Each receiver receives each divided stream transmitted in each channel formed with the connection frequency band according to the number of connection channels,
Wherein the bandwidth mode is determined according to the configuration of the plurality of receivers. The method of claim 3,
And the transmission control information is received together with the plurality of divided streams. The method according to claim 1,
The connection channel information may include version information for managing a maximum value of data that can be transmitted by the data slice included in each of the divided streams transmitted in each channel, And extension mode information indicating whether or not the maximum value of the transferable data is changed by the data slice. 6. The method of claim 5,
Wherein the transmission control information is received together with the plurality of divided streams,
When the extended mode information indicates that the maximum value of the transferable data has been changed by the data slice, the changed maximum value for the data transferable by the data slice is set in the transfer control information. Device. A receiving method of a receiving apparatus,
Reconstructing the original BB stream from the plurality of divided streams by the processing circuit of the receiving apparatus based on the connection channel information when the channels for transmitting the respective divided streams are connected to each other,
The receiving apparatus includes: a plurality of receivers for receiving a plurality of divided streams obtained by distributing a BB frame of a BB stream, which is a stream of a BB frame, into a plurality of data slices; and a receiving unit for receiving, from the plurality of divided streams, Said processing circuitry for reconstructing the original BB stream,
Wherein the number of receivers is equal to the number of the plurality of divided streams,
When the channels for transmitting the respective divided streams are connected to each other, the transmission control information includes a part of a frequency band between channels that are available by connecting the channels, and a connection And the connection channel information causing the divided streams transmitted on each channel formed in the frequency band to be received by each receiver. As a transmission device,
When a channel for transmitting each divided stream among a plurality of divided streams obtained by dividing a BB frame of a BB stream, which is a stream of a BB (BaseBand) frame, into a plurality of data slices is connected, And a connection channel information for allowing the receiving apparatus to receive each of the divided streams transmitted from the respective channels formed with connection frequency bands including a part of the frequency band between the first and second frequency bands before the bandwidth is connected, A processing circuit configured to generate control information; And
And a transmitter configured to transmit the transmission control information with the plurality of divided streams. 9. The method of claim 8,
Wherein the connection channel information indicates a bandwidth mode according to the number of channels to be connected. 10. The method of claim 9,
Each receiver receives a respective divided stream transmitted on each channel formed with the connection frequency band according to the number of connection channels,
And the bandwidth mode is determined according to the structure of the receiving apparatus. 9. The method of claim 8,
The connection channel information includes version information for managing a maximum value of data that can be transmitted by the data slice included in each of the divided streams and transmitted on each channel, or version information included in each of the divided streams, And extension mode information indicating whether or not the maximum value of the transferable data is changed by the data slice. 12. The method of claim 11,
When the extended mode information indicates that the maximum value of the transferable data by the data slice has changed, the changed maximum value for the transferable data by the data slice is set in the transfer control information. Device. A transmission method of a transmission apparatus,
When channels for transmitting each of a plurality of divided streams obtained by distributing a BB frame of a BB stream as a stream of a BB (BaseBand) frame to a plurality of data slices are connected, a frequency band The transmission control information including connection channel information for causing the receiving apparatus to receive the plurality of divided streams transmitted from the respective channels formed with connection frequency bands including a part of the connection frequency band before the bandwidth is connected, By a processing circuit; And
And transmitting, by the transmitter, the transmission control information together with the plurality of divided streams.

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