JP2017092671A - Broadcast receiver, broadcast reception system, broadcast reception method, and broadcast reception program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcast receiver, broadcast reception system, broadcast reception method, and broadcast reception program that are capable of transmitting, using a simple configuration, data acquired from a broadcast wave.SOLUTION: A broadcast receiver 101 comprises: a demodulation unit 21 that receives a broadcast wave and demodulates the received broadcast wave to generate reception data; an acquisition unit 22 that acquires target data from the reception data generated by the demodulation unit 21; an addition unit 23 that adds a MAC (Media Access Control) header to the target data acquired by the acquisition unit 22; and a transmission unit 24 that transmits the target data with the MAC header added by the addition unit 23 to another apparatus.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a broadcast receiving apparatus, a broadcast receiving system, a broadcast receiving method, and a broadcast receiving program, and more particularly to a broadcast receiving apparatus, a broadcast receiving system, a broadcast receiving method, and a broadcast receiving program that receive broadcast waves.

  In recent years, techniques for transmitting high-resolution video using various transmission paths have been developed. For example, Non-Patent Document 1 (Shuichi Aoki, “Media Transport Technology for Next Generation Broadcasting System”, July 2013, NHK R & D, [online], [searched on November 1, 2015], Internet <URL: http://www.nhk.or.jp/strl/publica/rd/rd140/PDF/P22-31.pdf>) discloses the following technology.

  That is, an IP (Internet Protocol) packet storing an MMT (MPEG Media Transport) packet is referred to as Non-Patent Document 2 (International Telecommunication Union Radiocommunications Sector, “Recommendation ITU-R BT. [Search on November 1, 2015], Internet <URL: http://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.1869-0-201003-I !! PDF-E.pdf>) describes a method of multiplexing on a broadcast transmission path using an IP packet multiplexing scheme. To have. Specifically, the IP packet is multiplexed on the broadcast transmission path using a TLV (Type Length Value) packet.

Shuichi Aoki, “Media transport technology for next-generation broadcasting system”, July 2013, NHK R & D, [online], [searched on November 1, 2015], Internet <URL: http: // www. nhk. or. jp / strl / publica / rd / rd140 / PDF / P22-31. pdf> International Telecommunication Union Radiocommunications Sector, “Recommendation ITU-R BT. 1869”, March 2010, [online], [November 1, 2015 search], Internet <URL: http: // www. itu. int / dms_public / itu-r / rec / bt / R-REC-BT. 1869-0-201003-I! ! PDF-E. pdf> The Japan Radio Industry Association, “Transmission Method for Digital Terrestrial Television Broadcasting Standard ARIB STD-B31 1.9 Edition”, [online], [searched November 1, 2015], Internet <URL: http: // www. arib. or. jp / english / html / overview / doc / 2-STD-B31v1_9. pdf>

  Non-patent document 1 does not disclose a method for transmitting data such as MMT / IP / TLV packets acquired from broadcast waves to a subsequent device as disclosed in non-patent document 2. There is a need for a technology that can transmit data acquired from broadcast waves with a simple configuration.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a broadcast receiving apparatus, a broadcast receiving system, a broadcast receiving method, and a broadcast receiving apparatus capable of transmitting data acquired from broadcast waves with a simple configuration It is to provide a broadcast receiving program.

  (1) In order to solve the above-described problem, a broadcast receiving apparatus according to an aspect of the present invention includes a demodulator that receives a broadcast wave and generates received data by demodulating the received broadcast wave, and the demodulation An acquisition unit that acquires target data from the received data generated by a unit, an addition unit that adds a Media Access Control (MAC) header to the target data acquired by the acquisition unit, and the MAC header by the addition unit And a transmission unit that transmits the target data to which is added to another device.

  (9) In order to solve the above-described problem, a broadcast receiving system according to an aspect of the present invention includes a broadcast receiving device that receives a broadcast wave including program information and a decoder device, and the broadcast receiving device includes: Received data is generated by demodulating the received broadcast wave, target data is acquired from the generated received data, a MAC (Media Access Control) header is added to the acquired target data, and the MAC header is added The target data is transmitted as transmission data to the decoder device, and the decoder device reproduces the program based on the transmission data received from the broadcast receiving device.

  (11) In order to solve the above problem, a broadcast receiving method according to an aspect of the present invention is a broadcast receiving method in a broadcast receiving apparatus that receives a broadcast wave, and is received by demodulating the received broadcast wave. A step of generating data, a step of acquiring target data from the generated received data, a step of adding a MAC (Media Access Control) header to the acquired target data, and the target data to which the MAC header is added Transmitting to other devices.

  (12) In order to solve the above-described problem, a broadcast receiving program according to an aspect of the present invention is a broadcast receiving program used in a broadcast receiving apparatus, and receives a broadcast wave from a computer and receives the received broadcast wave. A demodulator that generates received data by demodulating the signal, an acquisition unit that acquires target data from the received data generated by the demodulator, and a MAC (Media Access Control) in the target data acquired by the acquisition unit ) A program for functioning as an addition unit for adding a header and a transmission unit for transmitting the target data to which the MAC header is added by the addition unit to another device.

  The present invention can be realized not only as a broadcast receiving apparatus including such a characteristic processing unit, but also as a semiconductor integrated circuit that realizes part or all of the broadcast receiving apparatus.

  According to the present invention, data acquired from broadcast waves can be transmitted with a simple configuration.

FIG. 1 is a diagram showing a configuration of a broadcast receiving system according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a protocol stack of data transmitted by broadcast waves in the broadcast receiving system according to the first embodiment of the present invention. FIG. 3 is a diagram showing an example of a TLV packet used in the broadcast receiving system according to the first embodiment of the present invention. FIG. 4 is a diagram showing another example of a protocol stack of data transmitted by broadcast waves in the broadcast receiving system according to the first embodiment of the present invention. FIG. 5 is a diagram illustrating an example of a TS packet used in the broadcast receiving system according to the first embodiment of the present invention. FIG. 6 is a diagram showing the configuration of the broadcast receiving apparatus according to the first embodiment of the present invention. FIG. 7 is a diagram showing a configuration of a demodulation unit in the broadcast receiving apparatus according to the embodiment of the present invention. FIG. 8 is a diagram illustrating an example of a MAC frame generated by the MAC processing unit in the broadcast receiving apparatus according to the first embodiment of the present invention. FIG. 9 is a flowchart defining an operation procedure when the broadcast receiving apparatus according to the first embodiment of the present invention performs broadcast wave processing. FIG. 10 is a diagram showing a configuration of a broadcast receiving system according to the second embodiment of the present invention.

  First, the contents of the embodiment of the present invention will be listed and described.

  (1) A broadcast receiving apparatus according to an embodiment of the present invention receives a broadcast wave and demodulates the received broadcast wave to generate reception data, and the reception generated by the demodulation unit An acquisition unit that acquires target data from the data, an addition unit that adds a MAC (Media Access Control) header to the target data acquired by the acquisition unit, and the target data to which the MAC header is added by the addition unit And a transmission unit for transmitting to the other device.

  As described above, the target data included in the broadcast wave is acquired, and the target data is transmitted in accordance with the widely used IEEE 802.3 standard by adding the MAC header to the acquired target data and transmitting the data to another device. However, other devices can receive and process the target data by providing an interface conforming to the IEEE 802.3 standard. Therefore, the data acquired from the broadcast wave can be transmitted with a simple configuration.

  (2) Preferably, the reception data includes a packet having a header in which information indicating a data type is stored, and the acquisition unit acquires the target data stored in a payload in the packet.

  With such a configuration, the header analysis processing can be made unnecessary in another device, and thus the general reception configuration can be realized. In addition, since the broadcast receiving apparatus can recognize the type of the data without confirming the content of the data stored in the payload, the determination of the processing content for the data stored in the payload is based on the recognized type. Can be done easily.

  (3) More preferably, the packet is a TLV (Type Length Value) packet.

  With such a configuration, the type and size of the data stored in the payload can be recognized from the contents of the header of the TLV packet that can multiplex and store the IP packet. For example, it is not necessary to add an IP header. Can be easily performed based on the recognized type, and acquisition of data stored in the payload can be easily performed based on the recognized size.

  (4) More preferably, the target data is one or a plurality of IP (Internet Protocol) packets.

  With such a configuration, one or a plurality of IP packets can be stored in a MAC frame and transmitted to another device. Therefore, when another device has an interface for IP broadcasting, for example, a new interface is provided. The target data can be received and processed without any problem.

  (5) More preferably, the adding unit adds an IP header and a MAC header to the target data.

  With such a configuration, target data that is not stored in an IP packet in a broadcast wave can be stored in an IP packet and a MAC frame and transmitted to another device. When the interface is provided, the target data can be received and processed without providing a new interface.

  (6) Preferably, the target data includes information regarding transmission control of the broadcast wave, and the adding unit adds an IP header and a MAC header to the target data.

  With such a configuration, information relating to broadcast wave transmission control that is not stored in the IP packet in the broadcast wave can be stored in the IP packet and the MAC frame and transmitted to the other device. For example, when an interface for IP broadcasting is provided, the information can be received and processed without providing a new interface.

  (7) Preferably, the adding unit adds a MAC header storing a multicast address as a destination address to the target data.

  With such a configuration, it is possible to eliminate the process of acquiring the MAC address of the transmission destination in the broadcast receiving device, so that the target data stored in the MAC frame can be transmitted to a plurality of devices with a simple configuration. .

  (8) Preferably, the broadcast receiving apparatus further includes a determination unit that determines a storage method of the received data, and the addition unit has a TS (Transport Stream) determined by the storage unit determined by the determination unit. When the packet is used, an IP header and a MAC header are added to the target data.

  With such a configuration, even when TS packets are transmitted by broadcast waves, the TS packets can be stored in IP packets and MAC frames and transmitted to other devices. Can be transmitted. In addition, when another device is provided with an interface for IP broadcasting, for example, it can receive and process TS packets without providing a new interface.

  (9) A broadcast receiving system according to an embodiment of the present invention includes a broadcast receiving device that receives a broadcast wave including program information and a decoder device, and the broadcast receiving device demodulates the received broadcast wave. To generate reception data, acquire target data from the generated reception data, add a MAC (Media Access Control) header to the acquired target data, and transmit the target data with the MAC header added thereto as transmission data To the decoder device, and the decoder device reproduces the program based on the transmission data received from the broadcast receiving device.

  As described above, the target data included in the broadcast wave is acquired, and the target data is transmitted according to the widely used IEEE 802.3 standard by adding the MAC header to the acquired target data and transmitting the data to the decoder device. The decoder device is provided with an interface conforming to the IEEE 802.3 standard, so that it can receive the target data and reproduce the program. Therefore, the data acquired from the broadcast wave can be transmitted with a simple configuration.

  (10) Preferably, a destination address is stored in the MAC header, and the broadcast receiving system further transfers to the device of the destination address stored in the MAC header of the transmission data received from the broadcast receiving device. And a switch device for transferring the transmission data.

  With such a configuration, it is possible to realize diversification of transmission forms of transmission data in the broadcast receiving system.

  (11) A broadcast receiving method according to an embodiment of the present invention is a broadcast receiving method in a broadcast receiving device that receives a broadcast wave, and generates received data by demodulating the received broadcast wave; Acquiring the target data from the generated received data, adding a MAC (Media Access Control) header to the acquired target data, and transmitting the target data with the MAC header added to another device Steps.

  As described above, the target data included in the broadcast wave is acquired, and the target data is transmitted in accordance with the widely used IEEE 802.3 standard by adding the MAC header to the acquired target data and transmitting the data to another device. However, other devices can receive and process the target data by providing an interface conforming to the IEEE 802.3 standard. Therefore, the data acquired from the broadcast wave can be transmitted with a simple configuration.

  (12) A broadcast receiving program according to an embodiment of the present invention is a broadcast receiving program used in a broadcast receiving apparatus, and receives data by demodulating the received broadcast wave by a computer. A demodulating unit that generates data, an acquisition unit that acquires target data from the reception data generated by the demodulating unit, and an adding unit that adds a media access control (MAC) header to the target data acquired by the acquiring unit And a transmission unit that transmits the target data to which the MAC header has been added by the addition unit to another device.

  As described above, the target data included in the broadcast wave is acquired, and the target data is transmitted in accordance with the widely used IEEE 802.3 standard by adding the MAC header to the acquired target data and transmitting the data to another device. However, other devices can receive and process the target data by providing an interface conforming to the IEEE 802.3 standard. Therefore, the data acquired from the broadcast wave can be transmitted with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated. Moreover, you may combine arbitrarily at least one part of embodiment described below.

[Configuration and basic operation]
FIG. 1 is a diagram showing a configuration of a broadcast receiving system according to the first embodiment of the present invention.

  Referring to FIG. 1, a broadcast receiving system 301 includes a broadcast receiving device 101 and a decoder device 151.

  For example, a display device 111 and a storage device 121 are connected to the decoder device 151. For example, an external antenna 11 is connected to the broadcast receiving apparatus 101.

  The broadcast receiving apparatus 101 receives a broadcast wave BW including a stream, for example. The stream includes program information and the like. The program information includes, for example, audio and video information, EPG (Electronic Program Guide) information, SI information (Service Information), and caption information.

  For example, the broadcast receiving apparatus 101 receives a broadcast wave BW transmitted from a broadcast satellite 173 or a radio tower 174 for relaying a stream from a broadcast station (not shown) via the external antenna 11.

  The broadcast wave BW is a radio wave obtained by modulating the carrier wave CW by, for example, an OFDM (Orthogonal Frequency Division Multiplexing) modulation method in order to include the stream in the carrier wave CW.

  The broadcast wave BW includes, for example, a plurality of OFDM carriers. More specifically, the broadcast wave BW includes, for example, a plurality of OFDM carriers in each of a plurality of frequency regions with an OFDM segment as a unit.

  Each OFDM carrier transmits information related to transmission control of broadcast waves such as TMCC (Transmission and Multiplexing Configuration Control Information) information, OFDM carrier for transmitting additional information related to broadcast such as AC (Auxiliary Channel) information, And an OFDM carrier for transmitting program information.

  TMCC information can be found in Non-Patent Document 3 (Radio Industry Association, “Transmission Method for Digital Terrestrial Television Broadcasting Standard ARIB STD-B31 1.9 Edition”, [online], [retrieved on November 1, 2015] , Internet <URL: http://www.arib.or.jp/english/html/overview/doc/2-STD-B31v1_9.pdf>), for example, emergency alert broadcasting This is information that may be required in the decoder device 151 such as a start flag for use.

  As described on page 62 of Non-Patent Document 3, the AC information is information that may be required in the decoder device 151 such as earthquake motion warning information.

  FIG. 2 is a diagram illustrating an example of a protocol stack of data transmitted by broadcast waves in the broadcast receiving system according to the first embodiment of the present invention. In FIG. 2, a protocol stack using TLV packets is shown.

  Referring to FIG. 2, the TLV packet is often used for transmission such as 4K UHDTV (Ultra High Definition Television) or 8K UHDTV according to a standard such as 2160p or 4320p.

  The broadcast wave BW includes, for example, TMCC information, AC information, and a TLV packet.

  FIG. 3 is a diagram showing an example of a TLV packet used in the broadcast receiving system according to the first embodiment of the present invention. FIG. 3 shows a format of a TLV packet that is an example of a packet having a header in which information indicating the data type is stored and conforms to the standard of Non-Patent Document 2.

  Referring to FIG. 3, the TLV packet includes a TLV header and a TLV payload. The TLV header includes a “start code” field in which a value of “01” is stored, a “future reservation” field, a “packet type” field, and a “length” field, and the lengths of these fields. Are 2 bits, 6 bits, 8 bits and 16 bits, respectively.

  In the “packet type” field, a value such as “0x01”, “0x02”, “0x03”, or “0xFE” is stored. Hereinafter, a number starting with “0x” means that the number after “0x” is expressed in hexadecimal.

  When “0x01” is stored in the “packet type” field, the TLV packet 61 includes one or a plurality of IPv4 packets that are the total data length of the values stored in the “length” field in the TLV payload. .

  When “0x02” is stored in the “packet type” field, the TLV packet 62 is one or a plurality of IPv6 packets that are the total data length of the values stored in the “length” field in the TLV payload. including.

  When “0x03” is stored in the “packet type” field, the TLV packet 63 is one or a plurality of compressed IPs that are the total data length of the values stored in the “length” field in the TLV payload. Contains packets. The compressed IP packet is an IP packet in which an IP header is compressed, for example.

  When “0xFE” is stored in the “packet type” field, the TLV packet 64 includes a signaling packet that is the total data length of the values stored in the “length” field in the TLV payload. The signaling packet may include, for example, TLV-SI data indicating the correspondence between channel numbers and IP multicast addresses.

  Referring to FIG. 2 again, TLV-SI data is stored in, for example, TLV packet 64.

  Also, for example, NTP (Network Time Protocol) data for time synchronization, IP-SI data and time information, and MMT packet storing video information, audio information, MMT-SI data, and other information, or a data transmission method Is stored in a UDP (User Datagram Protocol) / IP packet.

  The TLV packet 61, 62, or 63 stores one or a plurality of such UDP / IP packets.

  FIG. 4 is a diagram showing another example of a protocol stack of data transmitted by broadcast waves in the broadcast receiving system according to the first embodiment of the present invention. FIG. 4 shows a protocol stack using TS packets.

  Referring to FIG. 4, TS packets are often used for transmission such as HDTV or Standard Definition Television (SDTV) according to a standard such as 1080i, 720p, or 480p. The TS packet may be used for transmission of 4K UHDTV or 8K UHDTV.

  The broadcast wave BW includes, for example, TMCC information, AC information, and TS packets.

  FIG. 5 is a diagram illustrating an example of a TS packet used in the broadcast receiving system according to the first embodiment of the present invention. FIG. 5 shows the format of the TS packet.

  Referring to FIG. 5, TS packet 71 includes a TS header and a TS payload. The TS header includes a “synchronization byte” field storing a value of “0x47” and a field for storing “PID (Packet ID) etc.”. The lengths of these fields are, for example, 1 octet and 3 octets. The TS payload includes, for example, a “payload” field for storing all or part of a PES (Packetized Elementary Stream) or all or part of a section. The length of this field is, for example, 184 octets.

  Referring to FIG. 4 again, PCR (Program Clock Reference) data is stored in TS packet 71, for example. Also, for example, video information, audio information, caption information, and timeline are stored in the PES packet.

  In addition, for example, PSI-SI data and a part of AIT (Application Information Table) are included in the section. Further, the remaining part of the AIT, the application HTMLLS and the content download transmitted in the data carousel method are included in the section.

  FIG. 6 is a diagram showing the configuration of the broadcast receiving apparatus according to the first embodiment of the present invention.

  Referring to FIG. 6, broadcast receiving apparatus 101 includes a demodulation unit 21, an acquisition unit (determination unit) 22, an addition unit 23, a transmission unit 24, and a frequency setting unit 29. The adding unit 23 includes a MAC processing unit 25, a TMCC information processing unit 26, a TLV-SI data processing unit 27, a TS packet processing unit 28, and an AC information processing unit 30.

  For example, the frequency setting unit 29 sets the frequency Fd of the carrier wave CW used for demodulation of the broadcast wave BW. More specifically, for example, the frequency setting unit 29 sets the frequency Fd in response to a request from the user or the host device, and outputs frequency information indicating the set frequency Fd to the demodulation unit 21.

  FIG. 7 is a diagram showing a configuration of a demodulation unit in the broadcast receiving apparatus according to the embodiment of the present invention.

  Referring to FIG. 7, the demodulator 21 includes a low noise amplifier 41, an orthogonal demodulator 42, an AD (Analog Digital) converter 43, an FFT (Fast Fourier Transform) processor 44, and a P / S (Parallel / A serial conversion unit 45 and an oscillator 46 are included.

  The demodulator 21 receives the broadcast wave BW and demodulates the received broadcast wave BW to generate reception data. Specifically, for example, the demodulator 21 receives the broadcast wave BW, and generates received data by demodulating the received broadcast wave BW according to the OFDM modulation scheme.

  More specifically, the low noise amplifier 41 in the demodulator 21 receives, for example, the broadcast wave BW from the external antenna 11 and amplifies the received broadcast wave BW. The low noise amplifier 41 outputs the amplified broadcast wave BW to the quadrature demodulation unit 42.

  The oscillator 46 receives frequency information from the frequency setting unit 29, generates a local signal Lo having a frequency Fd indicated by the frequency information, and outputs the local signal Lo to the quadrature demodulation unit 42.

  The quadrature demodulator 42 performs quadrature demodulation of the broadcast wave BW received from the low noise amplifier 41 using the local signal Lo received from the oscillator 46, for example, and the baseband I component analog signal Ia and the Q component analog signal. Qa is generated. The quadrature demodulator 42 outputs the generated analog signals Ia and Qa to the AD converter 43.

  The AD conversion unit 43 performs AD conversion on the analog signals Ia and Qa received from the quadrature demodulation unit 42 to generate digital signals Id and Qd, and outputs the generated digital signals Id and Qd to the FFT processing unit 44.

  The FFT processing unit 44 accumulates the digital signals Id and Qd received from the AD conversion unit 43 for a predetermined time, for example, OFDM symbol time, and performs FFT processing on the accumulated digital signals Id and Qd to thereby obtain the I component power spectrum Ips and Q component. The power spectrum Qps is generated.

  The FFT processing unit 44 outputs the generated power spectra Ips and Qps to the P / S conversion unit 45, for example, every OFDM symbol time.

  The P / S conversion unit 45 holds, for example, correspondence information indicating the correspondence between coordinates on the IQ plane and bit strings for each modulation scheme. For example, when the modulation scheme is 64 QAM (64 Quadrature Amplitude Modulation), the correspondence information indicates the correspondence between 64 coordinates on the IQ plane and a 6-bit bit string for each coordinate.

  For example, the P / S conversion unit 45 generates serial information as reception data for each OFDM symbol time.

  Specifically, for example, the P / S conversion unit 45 generates serial information for each OFDM carrier frequency based on the amplitude for each OFDM carrier frequency in the power spectrum Ips and Qps for each OFDM symbol time.

  More specifically, for example, when P / S conversion unit 45 receives power spectrum Ips and Qps from FFT processing unit 44 in a certain OFDM symbol time, it converts the amplitude of the I component in the received power spectrum Ips for each OFDM carrier frequency. And the amplitude of the Q component in the power spectrum Qps is acquired for each OFDM carrier frequency.

  For example, the P / S conversion unit 45 obtains coordinates in the IQ plane based on the amplitude of the I component and the Q component of the OFDM carrier frequency to be processed, and based on the correspondence information of the modulation scheme used in the OFDM carrier frequency. Thus, an inverse mapping process for acquiring a bit string corresponding to the obtained coordinates is performed.

  For example, the P / S conversion unit 45 generates a bit string for each OFDM carrier frequency by performing inverse mapping processing for all OFDM carrier frequencies for each OFDM symbol time, and generates the generated bit string, that is, serial information, to the acquisition unit 22. Output.

  At this time, for example, the P / S conversion unit 45 outputs a bit string generated by performing an inverse mapping process on the OFDM carrier frequency for transmitting TMCC information to the acquisition unit 22 as serial information Stmcc.

  In addition, the P / S conversion unit 45 outputs, for example, a bit string generated by performing inverse mapping processing on the OFDM carrier frequency for transmitting program information to the acquisition unit 22 as serial information Sprg.

  In addition, the P / S conversion unit 45 outputs, for example, a bit string generated by performing inverse mapping processing on the OFDM carrier frequency for transmitting AC information information to the acquisition unit 22 as serial information Sac.

  Referring to FIG. 6 again, the acquisition unit 22 acquires target data from the reception data generated by the demodulation unit 21. Moreover, the acquisition part 22 discriminate | determines the storage system of received data, for example as a discrimination | determination part.

  Specifically, the acquisition unit 22 determines, for example, one of a method using the TLV packets 61 to 64 shown in FIG. 3 and a method using the TS packet 71 shown in FIG. .

  More specifically, the acquisition unit 22 monitors, for example, the serial information Sprg output from the demodulation unit 21, and in the serial information Sprg, the bit string “01” stored in the “start code” illustrated in FIG. The value of “0x47” stored in “synchronization byte” shown in FIG. 5 is searched.

  For example, when the acquisition unit 22 detects a bit string of “01”, the acquisition unit 22 determines that the received data storage method is a method using the TLV packets 61 to 64. On the other hand, for example, when the value of “0x47” is detected, the acquisition unit 22 determines that the received data storage method is a method using the TS packet 71.

  For example, when the receiving unit 22 determines that the received data storage method is a method using the TLV packets 61 to 64, the acquiring unit 22 acquires the target data Tip or the target data Tsi stored in the TLV payload in the TLV packet.

  Here, the target data Tip is, for example, one or a plurality of IP packets. The target data Tsi is, for example, TLV-SI data.

  More specifically, for example, the acquisition unit 22 recognizes that the detected bit string of “01” is the start position of the TLV packet, and acquires the value stored in “packet type” 6 bits behind the bit string. To do. For example, when the acquired value is “0x01”, “0x02”, or “0x03”, the acquiring unit 22 recognizes that one or more IP packets are included in the TLV payload of the TLV packet.

  Then, the acquisition unit 22 acquires, for example, the value stored in the “length” field immediately after “packet type”, and in the field immediately after “length”, data corresponding to the acquired value, that is, 1 or A plurality of IP packets are acquired as target data Tip. For example, the acquisition unit 22 outputs the acquired target data Tip to the MAC processing unit 25.

  For example, when the acquired “packet type” value is “0xFE”, the acquiring unit 22 recognizes that a signaling packet is included in the TLV payload of the TLV packet.

  The acquiring unit 22 acquires the value stored in the “length” field immediately after the “packet type”, for example, and the data corresponding to the acquired value, that is, the signaling packet in the field immediately after the “length”. Check the contents of. For example, when the acquisition unit 22 confirms that the content is TLV-SI data, the acquisition unit 22 acquires the TLV-SI data as target data Tsi and outputs the acquired target data Tsi to the TLV-SI data processing unit 27. To do.

  For example, when the receiving unit 22 determines that the received data storage method is a method using the TS packet 71, the acquiring unit 22 sequentially acquires the TS packet 71 as the target data Tts from the serial information Sprg, and acquires the acquired target data Tts. Is output to the TS packet processing unit 28.

  Moreover, the acquisition part 22 acquires the object data Ttmcc containing the information regarding the transmission control of the broadcast wave BW, for example.

  More specifically, for example, the acquisition unit 22 monitors the serial information Stmcc output from the demodulation unit 21 and acquires TMCC information as the target data Ttmcc from the serial information Stmcc according to the standard described in Non-Patent Document 3. At this time, the acquisition unit 22 acquires, for example, TMCC information for a predetermined OFDM symbol as target data Ttmcc. For example, the acquisition unit 22 outputs the acquired target data Ttmcc to the TMCC information processing unit 26.

  Moreover, the acquisition part 22 acquires the additional information regarding broadcast, for example. More specifically, for example, the acquisition unit 22 monitors the serial information Sac received from the demodulation unit 21 and acquires AC information from the serial information Sac according to the standard described in Non-Patent Document 3. At this time, the acquisition unit 22 acquires AC information for a predetermined OFDM symbol, for example. For example, the acquisition unit 22 outputs the acquired AC information to the AC information processing unit 30.

  FIG. 8 is a diagram illustrating an example of a MAC frame generated by the MAC processing unit in the broadcast receiving apparatus according to the first embodiment of the present invention.

  With reference to FIGS. 6 and 8, the adding unit 23 adds a MAC header to the target data Tip, Tsi, Tts, and Ttmcc acquired by the acquiring unit 22. At this time, the adding unit 23 adds, for example, a MAC header storing a multicast address as a destination address to the target data Tip, Tsi, Tts, Ttmcc.

  For example, when the storage method determined by the acquisition unit 22 is a method using the TLV packets 61 to 64, the adding unit 23 may not add an IP header to the target data Tts.

  More specifically, when the MAC processing unit 25 in the adding unit 23 receives the target data Tip from the acquisition unit 22, for example, the destination IP multicast address IMA1 from the received target data Tip, that is, the IP header in one or a plurality of IP packets. And a predetermined arithmetic process is performed on the acquired IP multicast address IMA1 to calculate a multicast address MMA1 that is a destination MAC address.

  Then, for example, the MAC processing unit 25 stores the calculated multicast address MMA1 and its own MAC address in the “destination MAC address” and “source MAC address” fields, and “MAC footer”. Create

  For example, the MAC processing unit 25 generates the MAC frame Mip by adding the created “MAC header” and “MAC footer” immediately before and after the target data Tip, respectively. The MAC processing unit 25 outputs the generated MAC frame Mip, that is, the target data Tip to which the MAC header is added, to the transmission unit 24.

  Further, the adding unit 23 adds an IP header and a MAC header to the target data Tsi, for example.

  More specifically, when receiving the target data Tsi from the acquisition unit 22, for example, the TLV-SI data processing unit 27 in the adding unit 23 adds an IP header to the received target data Tsi.

  At this time, the TLV-SI data processing unit 27 stores, for example, a predetermined IP multicast address IMA2 as the destination address in the IP header. Here, the IP multicast address IMA2 has, for example, a value designated by the user or the like, or a specification value negotiated between the broadcast receiving apparatus 101 and the decoder apparatus 151.

  The TLV-SI data processing unit 27 outputs the target data Tsi to which the IP header is added (hereinafter also referred to as an IP packet Isi) to the MAC processing unit 25.

  When the MAC processing unit 25 receives the IP packet Isi from the TLV-SI data processing unit 27, the MAC processing unit 25 acquires the destination IP multicast address IMA2 from the IP header in the received IP packet Isi, and performs predetermined processing on the acquired IP multicast address IMA2. As a result, the multicast address MMA2 that is the destination MAC address is calculated.

  Then, for example, the MAC processing unit 25 stores the calculated multicast address MMA2 and its own MAC address in the “destination MAC address” and “source MAC address” fields, and “MAC footer”. Create

  The MAC processing unit 25 generates the MAC frame Msi by adding the created “MAC header” and “MAC footer” immediately before and immediately after the IP packet Isi, for example. The MAC processing unit 25 outputs the generated MAC frame Msi, that is, the target data Tsi to which the IP header and the MAC header are added, to the transmission unit 24.

  For example, when the storage method determined by the acquisition unit 22 is a method using the TS packet 71, the adding unit 23 adds an IP header and a MAC header to the target data Tts.

  More specifically, when the TS packet processing unit 28 in the adding unit 23 receives, for example, the target data Tts, that is, the TS packet 71 from the acquiring unit 22, the TS packet processing unit 28 accumulates a plurality of received TS packets 71 and stores the plurality of accumulated TSs. An IP header is added to the packet 71.

  At this time, the TS packet processing unit 28 stores, for example, a predetermined IP multicast address IMA3 as the destination address in the IP header. Here, the IP multicast address IMA3 has, for example, a value designated by the user or the like, or a specification value negotiated between the broadcast receiving apparatus 101 and the decoder apparatus 151.

  Note that the TS packet processing unit 28 may add an IP header to one TS packet 71 without accumulating a plurality of TS packets 71. However, since the packet length of the TS packet 71 is as short as 188 octets as shown in FIG. 5, it is preferable to add an IP header to a plurality of TS packets 71. As a result, subsequent processing can be performed efficiently.

  The TS packet processing unit 28 outputs a plurality of TS packets 71 (hereinafter also referred to as IP packets Its) to which the IP header is added to the MAC processing unit 25.

  When receiving the IP packet Its from the TS packet processing unit 28, the MAC processing unit 25 acquires the destination IP multicast address IMA3 from the IP header in the received IP packet Its, and performs a predetermined operation on the acquired IP multicast address IMA3. By performing the processing, a multicast address MMA3 that is a destination MAC address is calculated.

  Then, for example, the MAC processing unit 25 stores the calculated multicast address MMA3 and its own MAC address in the “destination MAC address” and “source MAC address” fields, and “MAC footer”. Create

  The MAC processing unit 25 generates the MAC frame Mts by adding the created “MAC header” and “MAC footer” immediately before and after the IP packet Its, for example. The MAC processing unit 25 outputs the generated MAC frame Mts, that is, the target data Tts to which the IP header and the MAC header are added, to the transmission unit 24.

  The adding unit 23 adds an IP header and a MAC header to the target data Ttmcc, for example.

  More specifically, when receiving the target data Ttmcc from the acquisition unit 22, for example, the TMCC information processing unit 26 in the adding unit 23 adds an IP header to the received target data Ttmcc.

  At this time, the TMCC information processing unit 26 stores, for example, a predetermined IP multicast address IMA4 as the destination address in the IP header. Here, the IP multicast address IMA4 has, for example, a value designated by the user or the like, or a specification value negotiated between the broadcast receiving apparatus 101 and the decoder apparatus 151.

  The TMCC information processing unit 26 outputs the target data Ttmcc (hereinafter also referred to as IP packet Itmcc) to which the IP header is added to the MAC processing unit 25.

  When receiving the IP packet Itmcc from the TMCC information processing unit 26, the MAC processing unit 25 acquires the destination IP multicast address IMA4 from the IP header in the received IP packet Itmcc, and performs a predetermined operation on the acquired IP multicast address IMA4. By performing the processing, a multicast address MMA4 that is a destination MAC address is calculated.

  Then, for example, the MAC processing unit 25 stores the calculated multicast address MMA4 and its own MAC address in the “destination MAC address” and “source MAC address” fields, and “MAC footer”. Create

  The MAC processing unit 25 generates the MAC frame Mtmcc by adding the created “MAC header” and “MAC footer” immediately before and after the IP packet Itmcc, for example. The MAC processing unit 25 outputs the generated MAC frame Mtmcc, that is, the target data Ttmcc to which the IP header and the MAC header are added, to the transmission unit 24.

  The adding unit 23 adds an IP header and a MAC header to AC information, for example.

  More specifically, when the AC information processing unit 30 in the adding unit 23 receives AC information from the obtaining unit 22, for example, it adds an IP header to the received AC information.

  At this time, the AC information processing unit 30 stores, for example, a predetermined IP multicast address IMA5 as the destination address in the IP header. Here, the IP multicast address IMA5 has, for example, a value designated by the user or the like, or a specification value negotiated between the broadcast receiving apparatus 101 and the decoder apparatus 151.

  The AC information processing unit 30 outputs AC information (hereinafter also referred to as an IP packet Iac) to which the IP header is added to the MAC processing unit 25.

  When receiving the IP packet Iac from the AC information processing unit 30, the MAC processing unit 25 acquires the destination IP multicast address IMA5 from the IP header in the received IP packet Iac, and performs a predetermined operation on the acquired IP multicast address IMA5. By performing the processing, a multicast address MMA5 that is a destination MAC address is calculated.

  Then, for example, the MAC processing unit 25 stores the calculated multicast address MMA5 and its own MAC address in the “destination MAC address” and “source MAC address” fields, and “MAC footer”. Create

  For example, the MAC processing unit 25 generates the MAC frame Mac by adding the created “MAC header” and “MAC footer” immediately before and after the IP packet Iac, respectively. The MAC processing unit 25 outputs the generated MAC frame Mac, that is, AC information to which the IP header and the MAC header are added, to the transmission unit 24.

  The transmission unit 24 transmits the target data Tip, Tsi, Tts, and Ttmcc, to which the MAC header is added by the addition unit 23, to the decoder device 151 as transmission data.

  Specifically, for example, when receiving the MAC frame Mip, Msi, Mts, Mtmcc or Mac from the adding unit 23, the TMCC information processing unit 26 has a “destination MAC address” in the received MAC frame, that is, a decoder device 151. The MAC frame is transmitted to.

  Referring to FIG. 1 again, when receiving the MAC frame Mip, Msi, Mts, Mtmcc or Mac from the broadcast receiving apparatus 101, the decoder apparatus 151 acquires target data or AC information from the MAC payload in the received MAC frame, A program is reproduced based on the acquired target data and AC information.

  For example, the decoder device 151 transmits the reproduced program to the display device 111 to display the program on the display device 111 or transmits the program to the storage device 121, thereby transmitting the program to the storage device 121. Record it.

[Operation]
Each device in the broadcast receiving system 301 includes a computer, and an arithmetic processing unit such as a CPU in the computer reads and executes a program including a part or all of each step of the following sequence diagram or flowchart from a memory (not shown). To do. Each of the programs of the plurality of apparatuses can be installed from the outside. The programs of the plurality of apparatuses are distributed while being stored in a recording medium.

  FIG. 9 is a flowchart defining an operation procedure when the broadcast receiving apparatus according to the first embodiment of the present invention performs broadcast wave processing.

  Referring to FIG. 9, first, broadcast receiving apparatus 101 receives broadcast wave BW and demodulates received broadcast wave BW to generate serial information Stmcc, Sprg, Sac (step S102).

  Next, broadcast receiving apparatus 101 detects TLV packet 61, 62 or 63 in serial information Sprg based on the values stored in “start code” and “packet type” shown in FIG. 3 (YES in step S104). ), The following processing is performed.

  That is, the broadcast receiving apparatus 101 acquires the target data Tip, that is, one or a plurality of IP packets from the TLV payload in the detected TLV packet 61, 62, or 63 (step S106).

  Next, the broadcast receiving apparatus 101 generates a MAC frame Mip by adding a MAC header to the acquired target data Tip (step S108).

  In addition, the broadcast receiving apparatus 101, based on the values stored in the “start code” and “packet type” shown in FIG. 3, the TLV packet 64 that stores the TLV-SI data that is the target data Tsi in the serial information Sprg. Is detected (NO in step S104 and YES in step S110), the following processing is performed.

  That is, the broadcast receiving apparatus 101 acquires the target data Tsi from the TLV payload in the detected TLV packet 64 (step S112).

  Next, the broadcast receiving apparatus 101 generates an MAC frame Msi by adding an IP header and a MAC header to the acquired target data Tsi (step S114).

  Further, the broadcast receiving apparatus 101 detects the TS packet 71 as the target data Tts in the serial information Sprg based on the “synchronization byte” shown in FIG. 5 (NO in step S104, NO in step S110, and step S116). YES), the following processing is performed.

  That is, the broadcast receiving apparatus 101 acquires the detected TS packet 71 from the serial information Sprg (step S118).

  Next, the broadcast receiving apparatus 101 accumulates a plurality of acquired TS packets 71, for example, and adds an IP header and a MAC header to the accumulated TS packets 71 to generate a MAC frame Mts (step S120).

  When the broadcast receiving apparatus 101 acquires TMCC information for a predetermined OFDM symbol as the target data Ttmcc from the serial information Stmcc (NO in step S104, NO in step S110, NO in step S116, and YES in step S122), Perform the process.

  That is, the broadcast receiving apparatus 101 adds the IP header and the MAC header to the acquired target data Ttmcc to generate a MAC frame Mtmcc (step S124).

  When the broadcast receiving apparatus 101 acquires AC information for a predetermined OFDM symbol from the serial information Sac (NO in step S104, NO in step S110, NO in step S116, NO in step S122, and YES in step S126), The following processing is performed.

  That is, the broadcast receiving apparatus 101 generates an MAC frame Mac by adding an IP header and a MAC header to the acquired AC information.

  Next, the broadcast receiving apparatus 101 generates a MAC frame Mip (step S108), generates a MAC frame Msi (step S114), generates a MAC frame Mts (step S120), or generates a MAC frame Mtmcc. When the MAC frame Mac is generated (step S128), the generated MAC frame Mip, Msi, Mts, Mtmcc or Mac is transmitted to the decoder device 151 (step S130).

  In the broadcast receiving apparatus 101 according to the first embodiment of the present invention, the adding unit 23 is configured to add a MAC header storing a multicast address as a destination address to the target data Tip, Tsi, Tts, Ttmcc. Although there is, it is not limited to this. The adding unit 23 may be configured to add a MAC header in which a unicast address is stored as a destination address to at least one of the target data Tip, Tsi, Tts, and Ttmcc.

  In the broadcast receiving apparatus 101 according to the first embodiment of the present invention, the acquisition unit 22 is configured to have the function of a determination unit, but is not limited thereto. The acquisition unit 22 may have a configuration that does not have the function of a determination unit.

  Moreover, in the broadcast receiving apparatus 101 according to the first embodiment of the present invention, the adding unit 23 adds one MAC header to one or a plurality of IP packets stored in one TLV packet. Although the configuration is such that the MAC frame is generated, the present invention is not limited to this. The adding unit 23 is configured to generate a plurality of MAC frames by dividing a plurality of IP packets stored in one TLV packet into a plurality of groups and adding a MAC header to each of the divided groups. May be. Further, the adding unit 23 generates one MAC frame by collecting one or more IP packets stored in a plurality of TLV packets into one group and adding a MAC header to the group. It may be. Also, the adding unit 23 generates a plurality of MAC frames by collecting one or a plurality of IP packets stored in a plurality of TLV packets into a plurality of groups and adding a MAC header to each group. It may be configured to.

  Incidentally, a method for transmitting data such as MMT / IP / TLV packets acquired from broadcast waves to a subsequent apparatus as disclosed in Non-Patent Document 2 is not disclosed in Non-Patent Document 1. There is a need for a technology that can transmit data acquired from broadcast waves with a simple configuration.

  On the other hand, in the broadcast receiving apparatus according to the first embodiment of the present invention, the demodulator 21 receives the broadcast wave BW and demodulates the received broadcast wave BW to generate reception data. The acquisition unit 22 acquires target data from the reception data generated by the demodulation unit 21. The adding unit 23 adds a MAC header to the target data acquired by the acquiring unit 22. Then, the transmission unit 24 transmits the target data to which the MAC header is added by the addition unit 23 to another device.

  As described above, the target data included in the broadcast wave BW is acquired, and the MAC data is added to the acquired target data and transmitted to another device, so that the target data is transmitted in accordance with the widely used IEEE 802.3 standard. The transmission and other devices are provided with an interface conforming to the IEEE 802.3 standard, so that the target data can be received and processed. Therefore, the data acquired from the broadcast wave can be transmitted with a simple configuration.

  In the broadcast receiving apparatus according to the first embodiment of the present invention, the received data includes a packet having a header in which information indicating the data type is stored. And the acquisition part 22 acquires the object data stored in the payload in the said packet.

  With such a configuration, the header analysis processing can be made unnecessary in another device, and thus the general reception configuration can be realized. Further, since the broadcast receiving apparatus 101 can recognize the type of the data without confirming the content of the data stored in the payload, the determination of the processing content for the data stored in the payload can be changed to the recognized type. This can be done simply.

  Moreover, in the broadcast receiving apparatus according to the first embodiment of the present invention, the packet is a TLV packet.

  With such a configuration, the type and size of the data stored in the payload can be recognized from the contents of the header of the TLV packet that can multiplex and store the IP packet. For example, it is not necessary to add an IP header. Can be easily performed based on the recognized type, and acquisition of data stored in the payload can be easily performed based on the recognized size.

  In the broadcast receiving device according to the first embodiment of the present invention, the target data Tip is one or a plurality of IP packets.

  With such a configuration, one or a plurality of IP packets can be stored in a MAC frame and transmitted to another device. Therefore, when another device has an interface for IP broadcasting, for example, a new interface is provided. The target data Tip can be received and processed without any problem.

  Moreover, in the broadcast receiving apparatus according to the first embodiment of the present invention, the adding unit 23 adds an IP header and a MAC header to the target data Tsi.

  With such a configuration, the target data Tsi that is not stored in the IP packet in the broadcast wave can be stored in the IP packet and the MAC frame and transmitted to another device. When the interface is provided, the target data Tsi can be received and processed without providing a new interface.

  In the broadcast receiving apparatus according to the first embodiment of the present invention, the target data Ttmcc includes information related to transmission control of the broadcast wave BW. Then, the adding unit 23 adds an IP header and a MAC header to the target data Ttmcc.

  With such a configuration, information relating to broadcast wave transmission control that is not stored in the IP packet in the broadcast wave can be stored in the IP packet and the MAC frame and transmitted to the other device. For example, when an interface for IP broadcasting is provided, the information can be received and processed without providing a new interface.

  In addition, in the broadcast receiving apparatus according to the first embodiment of the present invention, the adding unit 23 adds a MAC header storing a multicast address as a destination address to target data.

  With this configuration, it is possible to eliminate the process of acquiring the MAC address of the transmission destination in the broadcast receiving device 101, so that the target data stored in the MAC frame can be transmitted to a plurality of devices with a simple configuration. it can.

  Moreover, in the broadcast receiving apparatus according to the first embodiment of the present invention, the acquisition unit 22 determines a storage method for received data. Then, when the storage method determined by the acquisition unit 22 is a method using a TS packet, the adding unit 23 adds an IP header and a MAC header to the target data Tts.

  With such a configuration, even when TS packets are transmitted by broadcast waves, TS packets can be stored in IP packets and MAC frames and transmitted to other devices. Data can be transmitted. In addition, when another device is provided with an interface for IP broadcasting, for example, it can receive and process TS packets without providing a new interface.

  In the broadcast receiving system according to the first embodiment of the present invention, the broadcast receiving apparatus 101 generates reception data by demodulating the received broadcast wave BW, and acquires target data from the generated reception data. Then, a MAC header is added to the acquired target data, and the target data with the MAC header added is transmitted to the decoder device 151 as transmission data. Then, the decoder device 151 reproduces the program based on the transmission data received from the broadcast receiving device 101.

  As described above, the target data included in the broadcast wave BW is acquired, and the MAC data is added to the acquired target data and transmitted to the decoder device 151, so that the target data is obtained in accordance with the widely used IEEE 802.3 standard. The decoder device 151 can receive and process the target data by providing an interface conforming to the IEEE 802.3 standard. Therefore, the data acquired from the broadcast wave can be transmitted with a simple configuration.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Second Embodiment>
The present embodiment relates to a broadcast receiving system including a switch device as compared with the broadcast receiving system according to the first embodiment. The contents other than those described below are the same as those of the broadcast receiving system according to the first embodiment.

[Configuration and basic operation]
FIG. 10 is a diagram showing a configuration of a broadcast receiving system according to the second embodiment of the present invention.

  Referring to FIG. 10, broadcast receiving system 302 includes broadcast receiving devices 101A and 101B that are broadcast receiving devices 101, decoder devices 151A and 151B that are decoder devices 151, and a switch device 181.

  In FIG. 10, two broadcast receiving apparatuses 101 are representatively shown, but one or three or more broadcast receiving apparatuses 101 may be provided. Although two decoder devices 151 are representatively shown, one or three or more decoder devices 151 may be provided.

  For example, a display device 111 and a storage device 121 are connected to the decoder devices 151A and 151B, respectively. For example, an external antenna 11 is connected to each of the broadcast receiving apparatuses 101A and 101B.

  For example, the switch device 181 transfers the transmission data to the device having the destination address stored in the MAC header of the transmission data received from the broadcast receiving device 101.

  Specifically, the switch device 181 is, for example, an L2 switch, and receives a MAC frame Mip, Msi, Mts, Mtmcc or Mac from the broadcast receiving device 101A, according to a destination address stored in the received MAC frame. The MAC frame is transmitted to at least one of the decoder devices 151A and 151B.

  Similarly, when the switch device 181 receives a MAC frame Mip, Msi, Mts, Mtmcc or Mac from the broadcast receiving device 101B, for example, according to the destination address stored in the received MAC frame, the switch device 181 The MAC frame is transmitted to at least one of them.

  More specifically, for example, when the switch device 181 receives a MAC frame destined for both the decoder devices 151A and 151B from the broadcast receiving device 101A, the switch device 181 transfers the received MAC frame to the decoder devices 151A and 151B.

  With such a configuration, it is possible to distribute the target data included in the broadcast wave BW received by one broadcast receiving apparatus 101 to a plurality of decoder apparatuses 151.

  Further, for example, the switch device 181 receives the MAC frame FA destined for the decoder device 151A from the broadcast receiving device 101A and receives the MAC frame FB destined for the decoder device 151A from the broadcast receiving device 101B. The MAC frames FA and FB are transferred to the decoder device 151A.

  With such a configuration, the target data included in the broadcast wave BW received by each of the plurality of broadcast receiving apparatuses 101 can be collected well in one decoder apparatus 151.

  As described above, in the broadcast receiving system according to the second embodiment of the present invention, the destination address is stored in the MAC header. Then, the switching device 181 transfers the transmission data to the device having the destination address stored in the MAC header of the transmission data received from the broadcast receiving device 101.

  With such a configuration, it is possible to realize diversification of transmission data transmission forms in the broadcast receiving system 302.

  Since other configurations and operations are the same as those of the broadcast receiving system according to the first embodiment, detailed description thereof will not be repeated here.

  Note that some or all of the components and operations of the devices according to the first embodiment and the second embodiment of the present invention can be combined as appropriate.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The above description includes the following features.

[Appendix 1]
A demodulator that receives broadcast waves and generates received data by demodulating the received broadcast waves;
An acquisition unit for acquiring target data from the reception data generated by the demodulation unit;
An adding unit for adding a MAC (Media Access Control) header to the target data acquired by the acquiring unit;
A transmission unit that transmits the target data to which the MAC header is added by the addition unit to another device;
The demodulation unit receives the broadcast wave transmitted from a broadcast satellite or a radio tower and modulated by an OFDM (Orthogonal Frequency Division Multiplexing) modulation method, and demodulates the received broadcast wave according to the OFDM modulation method. A broadcast receiving device that generates the received data by:

[Appendix 2]
A broadcast receiving device for receiving broadcast waves including program information;
A decoder device,
The broadcast receiving apparatus generates reception data by demodulating the received broadcast wave, acquires target data from the generated reception data, and adds a MAC (Media Access Control) header to the acquired target data. , Transmitting the target data with the MAC header added thereto as transmission data to the decoder device,
The decoder device reproduces the program based on the transmission data received from the broadcast receiving device,
The broadcast receiving apparatus receives the broadcast wave transmitted from a broadcast satellite or a radio tower and modulated by an OFDM (Orthogonal Frequency Division Multiplexing) modulation method, and demodulates the received broadcast wave according to the OFDM modulation method. A broadcast receiving system for generating the reception data by

11 External antenna 21 Demodulation unit 22 Acquisition unit (discrimination unit)
DESCRIPTION OF SYMBOLS 23 Addition part 24 Transmission part 25 MAC processing part 26 TMCC information processing part 27 TLV-SI data processing part 28 TS packet processing part 29 Frequency setting part 30 AC information processing part 41 Low noise amplifier 42 Orthogonal demodulation part 43 AD conversion part 44 FFT processing 45 P / S converter 46 Oscillator 101 Broadcast receiver 111 Display device 121 Storage device 151 Decoder device 173 Broadcast satellite 174 Radio tower 181 Switch device 301, 302 Broadcast receiver

Claims (12)

A demodulator that receives broadcast waves and generates received data by demodulating the received broadcast waves;
An acquisition unit for acquiring target data from the reception data generated by the demodulation unit;
An adding unit for adding a MAC (Media Access Control) header to the target data acquired by the acquiring unit;
A broadcast receiving apparatus comprising: a transmission unit that transmits the target data to which the MAC header is added by the addition unit to another device. The received data includes a packet having a header in which information indicating a data type is stored,
The broadcast receiving apparatus according to claim 1, wherein the acquisition unit acquires the target data stored in a payload in the packet.   The broadcast receiving apparatus according to claim 2, wherein the packet is a TLV (Type Length Value) packet.   The broadcast receiving apparatus according to claim 2, wherein the target data is one or a plurality of IP (Internet Protocol) packets.   The broadcast receiving apparatus according to claim 2 or 3, wherein the adding unit adds an IP header and a MAC header to the target data. The target data includes information related to transmission control of the broadcast wave,
The broadcast receiving apparatus according to claim 1, wherein the adding unit adds an IP header and a MAC header to the target data.   The broadcast receiving apparatus according to claim 1, wherein the adding unit adds a MAC header in which a multicast address is stored as a destination address to the target data. The broadcast receiving device further includes:
A determination unit for determining a storage method of the received data;
8. The addition unit adds an IP header and a MAC header to the target data when the storage method determined by the determination unit is a method using a TS (Transport Stream) packet. The broadcast receiving device according to any one of the above. A broadcast receiving device for receiving broadcast waves including program information;
A decoder device,
The broadcast receiving apparatus generates reception data by demodulating the received broadcast wave, acquires target data from the generated reception data, and adds a MAC (Media Access Control) header to the acquired target data. , Transmitting the target data with the MAC header added thereto as transmission data to the decoder device,
The broadcast receiving system, wherein the decoder device reproduces the program based on the transmission data received from the broadcast receiving device. The MAC header stores a destination address,
The broadcast receiving system further includes:
The broadcast receiving system according to claim 9, further comprising a switch device that transfers the transmission data to a device having the destination address stored in the MAC header of the transmission data received from the broadcast receiving device. A broadcast receiving method in a broadcast receiving apparatus for receiving a broadcast wave,
Generating received data by demodulating the received broadcast wave;
Obtaining target data from the generated received data;
Adding a MAC (Media Access Control) header to the acquired target data;
Transmitting the target data to which the MAC header is added to another device. A broadcast receiving program used in a broadcast receiving device,
Computer
A demodulator that receives broadcast waves and generates received data by demodulating the received broadcast waves;
An acquisition unit for acquiring target data from the reception data generated by the demodulation unit;
An adding unit for adding a MAC (Media Access Control) header to the target data acquired by the acquiring unit;
A transmission unit that transmits the target data to which the MAC header is added by the addition unit to another device;
Broadcast reception program to function as

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