WO2015049900A1 - 送信装置及び送信方法、受信装置及び受信方法、並びにコンピューター・プログラム - Google Patents
送信装置及び送信方法、受信装置及び受信方法、並びにコンピューター・プログラム Download PDFInfo
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Definitions
- the technology disclosed in this specification includes a transmission apparatus and a transmission method for transmitting broadcast content using an IP system in a transport layer, and a reception apparatus for receiving broadcast content transmitted using an IP system in a transport layer. And a receiving method and a computer program.
- DVB Digital Video Broadcasting
- ATSC Advanced Television Systems Committee
- ISDB Integrated ServicesBing
- MPEG Motion Picture Experts Group
- IP Internet Protocol
- the data supplement server is divided into data units of a prescribed size that is larger than the data size stored in the data part of the supplementary IP packet transmitted on the communication line and multiplied by a predetermined integer value and packetized.
- the purpose of the technology disclosed in this specification is to provide an excellent transmission apparatus and transmission method that can suitably transmit broadcast contents by adopting the IP method in the transport layer, and to transmit by using the IP method in the transport layer. It is an object of the present invention to provide an excellent receiving apparatus and receiving method, and a computer program that can suitably receive and process broadcast content.
- IP Internet Protocol
- SDP Service Description Protocol
- SSC Service Signaling Channel
- the transmission device described in claim 1 is configured to express the SDPT in a section format and arrange service identification information and SDP in a header extension portion thereof. .
- the transmission device described in claim 1 includes, in the SDP arranged in the SDPT, the IP address, port number, and component of each component of the broadcast channel corresponding to the service identification information. It is configured to include attribute information.
- the transmission device is configured to transmit a broadcast program guide or a display format of program information using ESG (Electronic Service Guide). Yes.
- the transmission device is configured to describe the SDP URI in the ESG and also describe the SDP URI in the SDPT transmitted as the SSC. Has been.
- the transmission device described in claim 1 is configured to describe the bootstrap of ESG in the signaling acquired by the receiving side in the initial scan.
- An IP system is applied to the transport layer, and a broadcast signal in which the SDPT is arranged is transmitted to the SSC that is sent in the transport stream. It is a transmission method.
- a technique according to claim 8 of the present application is a receiving device that receives a broadcast signal in which an IP scheme is applied to a transport layer, A control signal processing unit for processing a control signal included in the broadcast signal; A stream processing unit for processing a stream of each component of the broadcast program; Comprising The control signal processing unit performs section filtering on the received transport stream to obtain a desired SDPT from the SSC, The stream processing unit processes a stream of a desired channel based on an IP address and a port number described in the SDP stored in the header extension part of the acquired SDPT. It is a receiving device.
- the receiving apparatus further includes a low layer control signal processing unit that performs low layer processing of a broadcast signal, and a recording unit that records data. Yes.
- the low layer control signal processing unit is configured to perform an initial scan, obtain signaling including ESG bootstrap, and record the signal in the recording unit.
- the receiving apparatus described in claim 9 further includes an ESG processing unit that processes ESG.
- the control signal processing unit obtains an ESG bootstrap from the signaling recorded in the recording unit, and the ESG processing unit obtains an ESG file based on the bootstrap. It is configured as follows.
- control signal processing unit of the receiving apparatus of claim 10 refers to the SDP from the ESG
- the control signal processing unit is based on the URI of the SDP described in the ESG.
- a corresponding SDPT is identified from the SSC, and the SDP is acquired from the SDPT.
- the technique according to claim 12 of the present application is A receiving method for receiving a broadcast signal in which an IP scheme is applied to a transport layer, Performing section filtering on the received transport stream to obtain the desired SDPT from the SSC;
- the stream processing unit processing a stream of a desired channel based on an IP address and a port number described in an SDP stored in a header extension portion of the acquired SDPT; Is a receiving method.
- the technology described in claim 13 of the present application is a computer program described in a computer-readable format so that a computer functions as a receiving device that receives a broadcast signal in which an IP scheme is applied to a transport layer.
- a control signal processing unit for processing a control signal included in a broadcast signal to the computer;
- a stream processing unit for processing a stream of each component of the broadcast program;
- Function as The control signal processing unit performs section filtering on the received transport stream to obtain a desired SDPT from the SSC,
- the stream processing unit processes a stream of a desired channel based on an IP address and a port number described in the SDP stored in the header extension part of the acquired SDPT. It is a computer program.
- the computer program according to claim 13 of the present application defines a computer program described in a computer-readable format so as to realize predetermined processing on a computer.
- a cooperative operation is exhibited on the computer, and the same effect as the receiving device according to claim 8 of the present application is obtained. Can do.
- an excellent transmission apparatus and transmission method that can suitably transmit broadcast contents by adopting an IP method for a transport layer, and transmission using an IP method for a transport layer It is possible to provide an excellent receiving apparatus and receiving method, and a computer program that can suitably receive and process broadcast content.
- FIG. 1 is a diagram schematically illustrating a configuration example of a digital broadcasting system 1 to which the technology disclosed in this specification can be applied.
- FIG. 2 is a diagram illustrating a protocol stack applied to transmission of broadcast signals in the digital broadcasting system 1 shown in FIG.
- FIG. 3 is a diagram illustrating a configuration example of the receiving device 300.
- FIG. 4 is a diagram schematically illustrating a mechanism in which the receiving apparatus 300 performs an initial scan.
- FIG. 5 is a diagram showing an image in which network information, transport stream information, and channel information are recorded in the NVRAM 313.
- FIG. 6 is a flowchart illustrating a processing procedure in which the receiving apparatus 300 performs an initial scan.
- FIG. 1 is a diagram schematically illustrating a configuration example of a digital broadcasting system 1 to which the technology disclosed in this specification can be applied.
- FIG. 2 is a diagram illustrating a protocol stack applied to transmission of broadcast signals in the digital broadcasting system 1 shown in FIG.
- FIG. 3 is
- FIG. 7 is a diagram illustrating the syntax structure of the ESG bootstrap descriptor stored in the signaling 211.
- FIG. 8 is a diagram schematically showing the structure of the SDPT arranged in the SSC.
- FIG. 9 is a diagram showing a mechanism for direct channel selection according to a channel selection operation using a remote controller or the like.
- FIG. 10 is a flowchart illustrating a processing procedure for the receiving apparatus 300 to directly select a channel.
- FIG. 11 is a diagram illustrating an internal signaling flow and a stream / data flow when the receiving apparatus 300 performs direct channel selection.
- FIG. 12 is a diagram showing a mechanism for channel selection from ESG in receiving apparatus 300.
- FIG. 13 is a flowchart illustrating a processing procedure for the receiving apparatus 300 to select a channel from the ESG.
- FIG. 14 is a diagram illustrating an internal signaling flow and a stream / data flow when the receiving apparatus 300 selects a channel from the ESG.
- FIG. 15 is a diagram illustrating a syntax example of SDPT.
- FIG. 16 is a diagram illustrating an example of SDP.
- FIG. 1 schematically shows a configuration example of a digital broadcasting system 100 to which the technology disclosed in this specification can be applied.
- a digital television broadcasting service 110 for a television receiver 130 using a ground wave or a satellite wave and a broadcasting service 120 for a portable terminal such as a cellular phone 140 are performed.
- the mobile terminal broadcast signal 121 may be transmitted by being superimposed on the digital television broadcast signal 111.
- the broadcast signal includes components constituting the program body such as a video stream, an audio stream, and a subtitle stream, program information, and other various data broadcasting data.
- the digital broadcasting system 100 adopts the IP system for the transport layer.
- the television receiver 130 displays a broadcast program on a screen or displays a hardware program when a tuner (not shown) selects and receives a digital television broadcast signal 111 arriving at a broadcast receiving antenna (not shown) installed outdoors, for example. -It accumulates in a recording device 131 such as a disc.
- the mobile phone 140 selects and receives the broadcast signal 121 for the mobile terminal, the mobile phone 140 displays the broadcast program for the mobile terminal on a screen or records it in a built-in memory (not shown).
- Each component of a program such as a video stream, an audio stream, and a subtitle stream may be provided from the streaming server 150 via an IP network such as the Internet 170 in addition to being distributed as the broadcast signals 111 and 121.
- the program information and other various data broadcasting contents are, for example, an application described in HTML (Hyper Text Markup Language) or XML (extensible Markup Language) format from the application server 160 via the Internet 170 as a television receiver 130. Or may be provided to the mobile phone 140.
- HTML Hyper Text Markup Language
- XML extensible Markup Language
- the television receiver 130 is connected to a LAN (Local Area Network) 180 installed in a home or the like, and is connected to the Internet 170 via a line terminator 182 such as an edge router 181 and an ONU (Optical Network Unit). Desired streaming components and data broadcasting contents can be acquired from the streaming server 150 and the application server 160.
- a desired component can be extracted from the transport stream by specifying an IP address and a port number.
- EPG Electronic Program Guide
- the EPG has functions such as display of a program guide, display of detailed information of each program, display of a program title at the time of channel selection, program search using a genre, a program title, and performers as keywords.
- EPG's main target is fixed TV installed in homes, etc., and provides unified services to devices with different screen sizes, aspect ratios, and processing functions, such as smartphones and other mobile terminals. There is a concern that it is not appropriate to do so.
- ESG Electronic Service Guide: Electronic Service Guide
- program information can be provided and displayed in a centralized manner for various devices having different screen sizes and processing performance.
- the ESG structure is a unified XML format (including tags used), and the information that can be described is defined according to the broadcasting service, and those elements are selected according to the service. What can be done (for example, service (channel) information, program information, program detailed information, program acquisition destination information, information on purchases for paid programs, etc.), and the like.
- ESG includes access method information for broadcasting services such as SDP (Service Description Protocol) and IP address, and can have a channel tuning processing function.
- SDP Service Description Protocol
- IP address IP address
- SDP is a protocol that describes a multimedia session for the purpose of starting a multimedia session having a format such as Session Announcement (see RFC 2327), and performs channel selection processing from there. be able to.
- RFC 2327 Session Announcement
- an SDP table that is, an SDPT is arranged in signaling information (Service Signaling Channel: SSC) sent by a transport stream from the transmission side such as a broadcasting station.
- the SDPT here is expressed in a binary section format, and service identification information and SDP are arranged in the header extension portion.
- the service identification information uniquely corresponds to the broadcast program channel.
- the SDP includes the IP address, port number, component attribute information, and the like of each component (video stream, audio stream, etc.) of the broadcast channel corresponding to the service identification information.
- the receiving side of the digital broadcasting service such as the television receiver 130 or the mobile phone 140 performs a section filtering process on the received transport stream so that the desired information can be easily and quickly obtained from the signaling information SSC. It is possible to obtain the SDPT.
- the channel selection process can be performed at high speed by accessing the stream of the desired channel based on the IP address and port number described in the SDP stored in the header extension portion of the acquired SDPT.
- the receiving side accesses the fixed IP address that transmits the signaling information SSC in the transport stream, and performs filtering using the service identification information (Service ID) in the header extension part of the fixed offset value, Only the desired SDPT can be obtained.
- Service ID Service ID
- the method of selecting a channel via the SDPT arranged as the signaling information SSC can acquire the channel selection information faster than the method of selecting the channel by acquiring the SDP from the ESG.
- the method of arranging the SDPT in the signaling information SSC sent by the transport stream has a high affinity with the conventional television receiver architecture. Therefore, since past assets can be used, the burden of implementation is reduced.
- the ESG can select a program from the ESG by placing an SDP inside (described above).
- an SDP inside
- the SDPT is transmitted as the signaling information SSC in the transport stream
- inconsistencies of different versions may occur between the SDP in the ESG and the SDP in the SDPT transmitted as the signaling information SSC.
- the SDP URI (Uniform Resource Identifier) is described in the SDP inside the ESG, not the SDP itself.
- the SDP URI is described in the SDPT transmitted as the signaling information SSC. Therefore, when referring to the SDP from the ESG in the receiving device (for example, when selecting from the ESG program guide), based on the service identification information corresponding to the selected channel and the SDP URI in the ESG, The corresponding SDP is obtained by specifying the corresponding SDPT from the signaling information SSC. According to such a method, it is not necessary to describe the SDP in the ESG, the double maintenance of the SDP becomes unnecessary, and inconsistency between the SDPT and the SDP can be prevented. In addition, since the SDP is represented by a URI, it is possible to specify a server on the Internet and the like, and the range of service operation is expanded. Details of the processing procedure for selecting a channel from the ESG program guide will be described later.
- the bootstrap of ESG is found from the broadcast signal, the IP address of the FLUTE (File Delivery over Unidirectional Transport protocol) session is confirmed, and the bootstrap session is used.
- the ESG provider discovery descriptor Provides Discovery Descriptor
- ESG access descriptor Access Descriptor
- the ESG bootstrap is described in the signaling acquired by the receiving side in the initial scan.
- the reception device stores the bootstrap acquired from the signaling at the time of the initial scan in a nonvolatile memory in the device such as NVRAM (Non Volatile RAM).
- NVRAM Non Volatile RAM
- FIG. 2 illustrates a protocol stack applied to transmission of a broadcast signal in the digital broadcasting system 100 according to the present embodiment.
- the packet of the signaling 211 and the data link layer 212 is transmitted using the packet structure of the physical layer 201. On the receiving side, information stored in the signaling 211 at the time of initial scanning is acquired.
- IP system is adopted for the transport layer.
- a transmission method of packets (IP packets) on the IP layer 221 is defined by a UDP (User Datagram Protocol) layer 231 which is a connectionless communication protocol.
- UDP User Datagram Protocol
- the transport stream includes SSC (Service Signaling Channel) for transmitting signaling information, FLUTE as a storage file transmission protocol, real-time RTP (Real-time Transport Protocol), and RTCP (Real-time Transport Control Protocol). Sessions 241 to 243 are included.
- SSC Service Signaling Channel
- FLUTE as a storage file transmission protocol
- RTP Real-time Transport Protocol
- RTCP Real-time Transport Control Protocol
- an SDP table that is, an SDPT is arranged in the SSC 241, but details will be given later.
- a plurality of files such as ESG data 251 and NRT (non-real-time) data 252 are transmitted on the FLUTE layer 242 session.
- the SDP URI of the ESG data 251 is described in the SDP URI, not the SDP itself.
- a FLUTE layer session for transmitting each file can be specified by an IP address and a port number.
- a stream of components of a broadcast program main body such as V (video), A (voice), CC (Closed Caption (caption etc.)) is transmitted.
- a regulatory supervisory body of a broadcasting communication business such as FCC (Federal Communications Commission) allocates a broadcasting frequency band (physical channel) having a predetermined frequency width to each broadcasting station. It should be understood that the protocol stack structure as shown in FIG. 2 exists for each broadcast frequency band (physical channel).
- FIG. 3 shows a configuration example of a receiving apparatus 300 that receives a broadcast signal composed of the protocol stack shown in FIG.
- the receiving device 300 corresponds to the television receiver 130 or the mobile phone 140.
- the receiving apparatus 300 is operated by a remote controller or the like, but the illustration of the remote control operation function is omitted.
- the broadcast tuner 301 selects and receives the digital television broadcast signal 111 or the mobile terminal broadcast signal 121 that has arrived at a broadcast receiving antenna (not shown).
- the communication interface (I / F) 302 receives communication signals from the streaming server 150 and the application server 160 via the Internet 170 and the LAN 180, and executes processing corresponding to the physical layer and the data link layer.
- the IP layer processing unit 303 performs IP layer processing on the received signal of the broadcast tuner 301 or the communication interface 302.
- the UDP layer processing unit 304 processes the UDP datagram transmitted by the broadcast signal 111 or 121 using the IP protocol.
- the control signal processing unit 305 processes a control signal such as signaling information SSC (Service Signaling Channel) transmitted in the UDP datagram.
- a control signal such as signaling information SSC (Service Signaling Channel) transmitted in the UDP datagram.
- SSC Service Signaling Channel
- an SDP table that is, an SDPT is arranged in the SSC, and the control signal processing unit 305 performs a direct channel selection process using the SDPT, and details thereof will be described later.
- the FLUTE processing unit 306 processes the FLUTE layer session sent as a UDP datagram, and extracts ESG and non-real time (NRT) files.
- the processing performed by the FLUTE processing unit 306 includes one-way error correction (Forward Error Correction: FEC).
- the RTP / RTCP processing unit 307 processes a real-time stream sent as a UDP datagram, and extracts each component of the broadcast program main body such as an image (V), audio (A), subtitle (CC), and the like.
- An NTP (Network Time Protocol) processing unit 308 accesses an NTP server based on the NTP protocol and processes time information. Normally, time information is transmitted from an NTP server using a UDP packet at a fixed period.
- a TCP (Transmission Control Protocol) layer processing unit 309 processes a TCP stream sent as a communication signal using the IP protocol.
- the HTTP (Hyper Text transfer Protocol) processing unit 310 performs content reception processing such as HTML sent in a TCP stream.
- a CAS (Conditional Access System) / DRM (Digital Rights Management) processing unit 311 performs limited viewing control of content received via broadcasting or communication, and copyright protection (replication and detection, etc.).
- the low layer control signal processing unit 312 processes the low layer control signal limited to the physical layer or the data link layer for the broadcast signal. For example, the signaling is acquired by the initial scan. In the present embodiment, the low layer control signal processing unit 312 records the signaling information acquired at the time of the initial scan in the NVRAM 313, and details thereof will be described later.
- the external output interface (I / F) 314 outputs the control signal processed by the control signal processing unit 305 to the outside.
- the ESG processing unit 315 performs display processing of a program guide and program information using the ESG extracted from the FLUTE layer session by the FLUTE processing unit 306.
- the browser 316 performs browsing processing of content such as non-real-time data taken out from the FLUTE layer session by the FLUTE processing unit 306 and HTML received by the HTTP processing unit 310.
- the video decoder 317, the audio decoder 318, and the subtitle decoder 319 respectively decode the image (V), audio (A), and subtitle (CC) components extracted from the real-time stream by the RTP / RTCP processing unit 307. Then, based on the time information acquired by the NTP processing unit 308, the clock processing unit 320 synchronizes the decoding processing of each component by the video decoder 317, the audio decoder 318, and the caption decoder 319.
- the recording unit 321 appropriately records information output from the FLUTE processing unit 306, the RTP / RTCP processing unit 307, the NTP 308, and the HTTP processing unit 309.
- the initial scan receiving apparatus 300 performs an initial scan at the start of use and acquires network information.
- FIG. 4 schematically shows a mechanism in which the receiving apparatus 300 performs an initial scan.
- the low layer control signal processing unit 312 in the receiving apparatus 300 performs scanning for each broadcast frequency band (physical channel) assigned to each broadcast station, and acquires network information, transport stream information, and channel information. And recorded in the NVRAM 313.
- the network information 410 acquired at the time of the initial scan includes network identification information (NID) for identifying the scanned broadcast frequency band and its physical information (frequency, etc.) 411 and each transport stream included in the broadcast frequency band.
- Transport stream information 420 is included.
- Each transport stream has transport stream identification information (TSID).
- the regulatory supervisory body of the broadcast communication business such as FCC assigns the broadcast frequency band (physical channel) and TSID.
- the transport stream information 420 includes an IP address and a port number of the SSC 241 (see FIG. 2) transmitted in the transport stream, an ESG bootstrap (described later) acquired from the signaling 211,
- the channel information 430 of each broadcast channel included in the transport stream is included.
- the channel information 430 includes service identification information (TSIDServiceID) of the broadcast channel and a channel (CH) number.
- TIDServiceID service identification information
- CH channel
- One transport stream may contain two types of channel numbers, major and minor.
- the channel number selected by operating the remote controller or the like uniquely corresponds to the service identification information.
- FIG. 5 shows an image in which network information, transport stream information, and channel information are recorded in the NVRAM 313.
- ServiceID service identification information
- NID network identification information
- TSID transport stream identification information
- FIG. 6 shows a processing procedure in which the receiving apparatus 300 performs an initial scan in the form of a flowchart.
- the low layer control signal processing unit 312 scans the broadcast frequency band via the broadcast tuner 301 (step S602).
- the low layer control signal processing unit 312 acquires the channel information from signaling and records it in the NVRAM 313 (step S604).
- step S605 when scanning is completed for all broadcast frequency bands (Yes in step S605), the entire processing routine is terminated.
- the process returns to step S602, and the unprocessed frequency band is repeatedly scanned.
- the low layer control signal processing unit 312 acquires the signaling 211 (see FIG. 2) from each broadcast frequency band (channel) during the initial scan.
- the ESG bootstrap is described in the signaling 211.
- FIG. 7 shows the syntax structure (syntax) of the ESG bootstrap descriptor (bootstrap_descriptor) stored in the signaling 211.
- tag information of the descriptor is written.
- descriptor_length field indicated by reference number 702 the data length of the descriptor is written.
- Service identification information is written in a service_id field indicated by reference number 703.
- An IP_version_flag indicated by reference numeral 704 is a flag indicating the version of the IP method to be used (which is IPv4 or IPv6).
- Source_IP_address indicated by reference number 705 the IP address of the transmission source of this transport stream is written.
- destination_IP_address and destination_port_num indicated by reference numbers 706 and 707 the IP address and port number of the FLUTE layer session transmitting the ESG data are written, respectively.
- An ESG transport session identifier (TSI) is written in the TSI indicated by reference numeral 708.
- the low layer control signal processing unit 312 records the ESG bootstrap acquired from the signaling 211 in the NVRAM 313 during the initial scan. Accordingly, when an ESG display request is subsequently made in the receiving apparatus 300, the bootstrap is not acquired from the broadcast signal each time, but is loaded from the NVRAM 313, so that the ESG can be displayed at high speed. There is a merit that you can.
- ESG is adopted as a display format for a TV broadcast program guide or program information.
- ESG is an XML format with a unified structure (including tags to be used), and information that can be described according to broadcasting services is defined, and those elements can be selected according to the service.
- Program information can be provided and displayed centrally for various devices with different screen sizes and processing performance.
- ESG includes access method information for broadcasting services such as SDP and IP address, and can have a channel tuning processing function.
- SDP broadcasting services
- IP address IP address
- an SDP table for each service identification information that is, an SDPT is arranged in the SSC 241 sent by the transport stream. Therefore, when receiving apparatus 300 obtains an SDP from signaling information at high speed and easily by performing section filtering processing on the received transport stream, channel selection processing is performed at high speed based on the description content of the SDP. (Direct tuning) will be possible.
- FIG. 8 schematically shows the structure of the SDPT arranged in the SSC.
- An example of syntax of SDPT (syntax) is also shown in FIG.
- the SDPT 800 shown in FIG. 8 is expressed in a binary section format, and service identification information (service id) 801 and SDP 802 are arranged in the header extension portion.
- the service identification information 801 uniquely corresponds to a broadcast program channel.
- the SDP URI is described in the SDP of the ESG, but the SDP URI is also described in the SDP 802 in the SDPT 800.
- the SDP 802 in the SDPT 800 displays the IP address (copm_IP_address), port number (port_number), component attribute information (comp_attribute), etc. of each component (video stream, audio stream, etc.) of the broadcast channel corresponding to the service identification information 801. Contains.
- the receiving apparatus 300 can perform the section filtering process on the corresponding transport stream, and can easily obtain the SDP from the SSC 241 at high speed. Then, by accessing a stream of a desired channel based on the IP address and port number described in the acquired SDP, channel selection processing can be performed directly without performing ESG processing.
- Fig. 9 illustrates the mechanism for direct channel selection according to the channel selection operation of the remote control.
- control signal processing unit 305 refers to the information recorded in the NVRAM 313 as indicated by the reference number 902
- the control signal processing unit 305 indicates the service identification information corresponding to the selected channel as indicated by the reference number 903.
- Network identification information (NID) and transport stream identification information (TSID) can be acquired.
- NID # 1 and TSID # 0 are acquired.
- a regulatory supervisory body of a broadcasting communication business such as FCC assigns a broadcasting frequency band (physical channel) and a TSID.
- Broadcast tuner 301 tunes to a broadcast frequency band corresponding to NID # 1, as indicated by reference numeral 904.
- the IP layer processing unit 303 then processes the transport stream TSID # 0 that flows through NID # 1, as indicated by reference numeral 905.
- a plurality of streams including SSC are transmitted.
- the SDPT is arranged in the SSC.
- the IP address and port number of the SSC to be transmitted in the transport stream are recorded in advance in the NVRAM 313 (see the above and FIG. 4).
- the control signal processing unit 305 accesses the SSC in the transport stream based on the IP address and port number of the SSC read from the NVRAM 313.
- An SDPT for each service identification information is arranged in the SSC.
- the control signal processing unit 305 performs section filtering processing based on the service identification information, and acquires the corresponding SDPT from the SSC.
- the SDP in the SDPT stores the IP address, port number, and attribute information (codec type) of each component (video stream, audio stream, etc.) of the broadcast channel corresponding to the service identification information (see the above and FIG. 8). ) Therefore, the RTP / RTCP processing unit 307, based on the IP address, the port number, and the attribute (codec attribute) acquired from the SDP in the SDPT, shows the selected broadcast channel 10.1CH as indicated by the reference number 908.
- the video (V) and audio (A) components can be accessed.
- the video decoder 317 and the audio decoder 318 decode each component while synchronizing based on the time information acquired by the NTP processing unit 308. And it outputs as a broadcast program.
- FIG. 10 shows a processing procedure for direct channel selection by the receiving apparatus 300 in the form of a flowchart.
- FIG. 11 illustrates an internal signaling flow and a stream / data flow when the receiving apparatus 300 performs direct channel selection.
- control signal processing unit 305 acquires network identification information and transport stream identification information from the NVRAM 313 as information on the selected channel. To do.
- steps S1001 to S1002 corresponds to the signaling flow F1101 in FIG.
- Broadcast tuner 301 adjusts to the frequency band of the broadcast wave from which the corresponding channel is sent (step S1003). Then, the IP layer processing unit 303 processes the transport stream that flows in the frequency band.
- control signal processing unit 305 accesses the SSC in the transport stream based on the IP address and port number of the SSC read from the NVRAM 313, the control signal processing unit 305 acquires the SDPT (step S1004). Then, it is checked whether the service identification information of the SDPT matches the service identification information of the selected channel (step S1005). If they do not match (No in step 1005), the process returns to step S1004, and SDPT acquisition is repeated.
- the SDPT whose service identification information matches is the SDPT of the selected channel (step S1006).
- the control signal processing unit 305 acquires the channel information of the selected channel, that is, the IP address, port number, and attribute information (codec type) of each component (video stream, audio stream, etc.) from the acquired SDPT. (Step S1007).
- steps S1003 to S1007 corresponds to the signaling flow F1102 in FIG.
- the RTP / RTCP processing unit 307 connects to the stream of each component based on the acquired stream information.
- the NTP processing unit 308 receives a UDP packet transmitted from the NTP server at a constant period, and processes time information (step S1008).
- the RTP / RTCP processing unit 307 receives and processes the connected video stream and audio stream (step S1009).
- the video decoder 317 and the audio decoder 318 respectively decode the received video stream and audio stream while synchronizing based on the time information acquired by the NTP processing unit 308 (step S1010). Until viewing ends (No in step S1011), the reception of the stream (step S1009) and the decoding process (step S1010) are repeated.
- steps S1008 to S1011 corresponds to the signaling and stream / data flow F1103 in FIG.
- the receiving apparatus 300 By arranging the SDPT in the signaling information SSC sent in the transport stream transmitted from the broadcasting station, the receiving apparatus 300 acquires the desired SDPT by the section filtering process as shown in FIGS.
- the channel selection process can be performed quickly and easily without performing the ESG process.
- the method of arranging the SDPT in the SSC has a high affinity with the conventional television receiver architecture. Therefore, since past assets can be used, the burden of implementation is reduced.
- ESG is adopted as a display format for a TV broadcast program guide or program information.
- ESG is an XML format with a unified structure (including tags to be used), and information that can be described according to broadcasting services is defined, and those elements can be selected according to the service.
- Program information can be provided and displayed centrally for various devices with different screen sizes and processing performance.
- ESG includes access method information for broadcasting services such as SDP and IP address, and can have a channel tuning processing function.
- the bootstrap of the ESG is found from the broadcast signal, the IP address of the FLUTE session is confirmed, and the ESG provider discovery descriptor or the ESG access A complicated procedure of acquiring the basic information of the ESG transmitted from the descriptor and selecting the ESG is required, and processing takes time.
- the ESG bootstrap is described in the signaling acquired in the initial scan in the broadcast signal.
- the receiving apparatus 300 records the bootstrap acquired from the signaling at the time of the initial scan in the NVRAM 313 (see the above and FIG. 4). Therefore, when an ESG display request is made, the receiving apparatus 300 only needs to load the bootstrap from the NVRAM instead of acquiring it from the broadcast signal, so that the ESG can be displayed at a high speed. .
- ESG can select a program from ESG by placing SDP inside.
- the SDPT arranged in the SSC also includes the SDP, there is a problem that it is necessary to perform double maintenance of the SDP, and there is a possibility that inconsistency may occur due to a version difference between the two.
- the SDP URI is described in the SDP inside the ESG. Therefore, in the receiving apparatus 300, when a channel is selected from the ESG program guide, when referring to the SDP from the ESG, from the SSC based on the service identification information corresponding to the selected channel and the SDP URI. The corresponding SDPT is specified and the SDP is acquired. Then, it is possible to access each component of the selected channel based on the IP address, the port number, and the attribute (codec attribute) described in the SDP.
- An example of SDP is shown in FIG.
- FIG. 12 illustrates a mechanism for channel selection from the ESG in the receiving apparatus 300.
- ESG display is instructed by a remote controller or the like as indicated by reference numeral 1201.
- the ESG bootstrap describes the IP address and port number (destination_IP_address, destination_port_num) of the FLUTE layer session that transmits ESG data.
- the control signal processing unit 305 acquires the IP address and port number information from the bootstrap information recorded in the NVRAM 313, the control signal processing unit 305 accesses the FLUTE layer session in which the ESG is transmitted, and is indicated by reference numeral 1202.
- FDT File Delivery Table
- TOI Transmission Object Identifier
- index information corresponding to each file transmitted in the same session is stored.
- the index information includes a file TOI, a file name, a file type (Content type), and position information (Content location).
- the control signal processing unit 305 finds the ESG index information from the FDT and acquires the ESG, as indicated by reference numeral 1203.
- the ESG-SGDU Service Guide Delivery Unit
- ESG-SGDD Service Guide Delivery Descriptor
- the ESG-SGDD notifies group descriptor information for SGDU and information descriptor entry related to the entry point for receiving the notification message.
- the ESG processing unit 315 displays the acquired ESG.
- the ESG processing unit 315 performs a corresponding fragment (fragment SDP) in the ESG-SGDU. To obtain the SDP URI.
- the IP address and port number of the SSC to be transmitted in the transport stream are recorded in the NVRAM 313 in advance by the initial scan (see the above and FIG. 4).
- the control signal processing unit 305 accesses the SSC based on the IP address and port number of the SSC read from the NVRAM 313, and as shown by the reference number 1206, the section signal based on the service identification information corresponding to the selected channel. A filtering process is performed to obtain the corresponding SDPT.
- the control signal processing unit 305 may cache the latest version of the SDPT that is periodically transferred by the SSC.
- control signal processing unit 305 selects an SDP corresponding to the SDP URI acquired from the ESG-SGDU from the SDPT.
- the SDP stores the IP address, port number, and attribute information (codec type) of each component (video stream, audio stream, etc.) of the broadcast channel corresponding to the service identification information (see above and FIG. 8). . Therefore, the RTP / RTCP processing unit 307, based on the IP address, the port number, and the attribute (codec attribute) acquired from the SDP in the SDPT, shows the selected broadcast channel 10.1CH as indicated by the reference number 1208. The video (V) and audio (A) component streams can be accessed. Then, the video decoder 317 and the audio decoder 318 decode each component while synchronizing based on the time information acquired by the NTP processing unit 308. And it outputs as a broadcast program.
- codec type codec type
- FIG. 13 shows a processing procedure for the channel selection from the ESG by the receiving apparatus 300 in the form of a flowchart.
- FIG. 14 illustrates an internal signaling flow and a stream / data flow when the receiving apparatus 300 selects a channel from the ESG.
- step S1302 When ESG display is instructed by a remote controller or the like (Yes in step S1301), the control signal processing unit 305 acquires bootstrap information from the NVRAM 313 (step S1302).
- steps S1301 to S1302 corresponds to the signaling flow F1401 in FIG.
- the FLUTE processing unit 306 connects to the FLUTE layer session in which the ESG is transmitted, and acquires the FDT (step S1303). . Then, the FLUTE processing unit 306 finds the ESG index information from the FDT and acquires the ESG, and the ESG processing unit 315 displays the ESG (step S1304).
- steps S1303 to S1304 corresponds to the stream / data flow F1402 in FIG.
- the ESG processing unit 315 acquires the URI of the SDP corresponding to the selected channel from the ESG (step S1306).
- steps S1305 to S1306 corresponds to the stream / data flow F1403 in FIG.
- control signal processing unit 305 accesses the SSC based on the IP address and port number of the SSC recorded in the NVRAM 313, and acquires the SDPT (step S1307). Then, it is checked whether the service identification information of the SDPT matches the service identification information of the selected channel (step S1308). If they do not match (No in step 1308), the process returns to step S1307, and SDPT acquisition is repeated.
- the SDPT whose service identification information matches is the SDPT of the selected channel (step S1309).
- the control signal processing unit 305 acquires the channel information of the selected channel, that is, the IP address, port number, and attribute information (codec type) of each component (video stream, audio stream, etc.) from the acquired SDPT. (Step S1310).
- steps S1307 to S1310 corresponds to the stream / data flow F1404 in FIG.
- the RTP / RTCP processing unit 307 connects to the stream of each component based on the acquired stream information. Further, the NTP processing unit 308 connects to the NTP server and synchronizes to the correct time (step S1311).
- the RTP / RTCP processing unit 307 receives and processes the connected video stream and audio stream (step S1312).
- the video decoder 317 and the audio decoder 318 respectively decode the received video stream and audio stream while synchronizing based on the time information acquired by the NTP processing unit 308 (step S1313).
- the reception of the stream (step S1312) and the decoding process (step S1313) are repeated.
- steps S1311 to S1314 corresponds to the signaling and stream / data flow F1405 in FIG.
- the technology disclosed in the present specification can be applied to a broadcasting system based on the broadcast standard ATSC adopted in the United States and the like, for example, but the scope of application is limited to this. is not.
- the present specification similarly applies to various broadcasting systems based on other broadcasting standards that employ the IP system for transport streams and other broadcasting standards that use ESG as a display format for TV broadcast program guides or program information.
- the technology disclosed in (1) can be applied.
- An IP (Internet Protocol) method is applied to the transport layer, and a broadcast signal in which an SDP (Service Description Protocol) table (SDPT) is arranged in an SSC (Service Signaling Channel) to be transmitted in a transport stream is transmitted.
- Transmitter device (2) Express SDPT in section format and place service identification information and SDP in the header extension part.
- the IP address, port number, and component attribute information of each component of the broadcast channel corresponding to the service identification information are included in the SDP arranged in the SDPT.
- the transmission device according to (1) above. (4) Transmit a broadcast program guide or program information display format using ESG (Electronic Service Guide).
- ESG Electronic Service Guide
- the SDP URI is described in the ESG, and the SDP URI is also described in the SDPT transmitted as the SSC.
- the ESG bootstrap is described in the signaling acquired by the receiver in the initial scan.
- An IP system is applied to the transport layer, and a broadcast signal in which the SDPT is arranged is transmitted to the SSC to be transmitted in the transport stream. Transmission method.
- a receiving device that receives a broadcast signal in which an IP scheme is applied to a transport layer, A control signal processing unit for processing a control signal included in the broadcast signal; A stream processing unit for processing a stream of each component of the broadcast program; Comprising The control signal processing unit performs section filtering on the received transport stream to obtain a desired SDPT from the SSC, The stream processing unit processes a stream of a desired channel based on an IP address and a port number described in the SDP stored in the header extension part of the acquired SDPT. Receiver device.
- a low layer control signal processing unit that performs low layer processing of the broadcast signal, and a recording unit that records data;
- the low layer control signal processing unit performs initial scanning, acquires signaling including ESG bootstrap, and records it in the recording unit.
- the receiving device according to (8) above.
- An ESG processing unit that processes ESG is further provided, When displaying the ESG, the control signal processing unit acquires an ESG bootstrap from the signaling recorded in the recording unit, and the ESG processing unit acquires an ESG file based on the bootstrap.
- the control signal processing unit When referring to the SDP from the ESG, the control signal processing unit identifies the corresponding SDPT from the SSC based on the URI of the SDP described in the ESG, and acquires the SDP from within the SDPT.
- the receiving device according to (10) above.
- (12) A reception method for receiving a broadcast signal in which an IP scheme is applied to a transport layer, Performing section filtering on the received transport stream to obtain the desired SDPT from the SSC;
- the stream processing unit processing a stream of a desired channel based on an IP address and a port number described in an SDP stored in a header extension portion of the acquired SDPT; Receiving method.
- Control signal processing unit for processing A stream processing unit for processing a stream of each component of the broadcast program; Function as The control signal processing unit performs section filtering on the received transport stream to obtain a desired SDPT from the SSC, The stream processing unit processes a stream of a desired channel based on an IP address and a port number described in the SDP stored in the header extension part of the acquired SDPT.
- SYMBOLS 100 Digital broadcast system 110 ... Digital television broadcast service 120 ... Broadcast service for portable terminals 130 ... Television receiver, 131 ... Recording apparatus, 140 ... Mobile phone 150 ... Streaming server, 160 ... Application server 170 ... Internet, 180 ... LAN 181 ... Edge router, 182 ... ONU DESCRIPTION OF SYMBOLS 301 ... Broadcast tuner, 302 ... Communication interface 303 ... IP layer process part, 304 ... UDP layer process part, 305 ... Control signal process part 306 ... FLUTE process part, 307 ... RTP / RTCP process part 308 ... NTP process part, 309 ... TCP layer processing unit 310 ... HTTP processing unit 311 ...
- CAS / DRM processing unit 312 ... Low layer control signal processing unit 313 ... NVRAM 314 ... External output interface 315 ... ESG processing unit 316 ... Browser 317 ... Video decoder 318 ... Audio decoder, 319 ... Subtitle decoder 320 ... Clock processing unit, 321 ... Storage unit
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Abstract
Description
トランスポート層にIP(Internet Protocol)方式を適用し、トランスポート・ストリームで送るSSC(Service Signaling Channel)にSDP(Service Description Protocol)のテーブル(SDPT)を配置した放送信号を送信する、
送信装置である。
トランスポート層にIP方式を適用し、トランスポート・ストリームで送るSSCにSDPTを配置した放送信号を送信する、
送信方法である。
放送信号に含まれる制御信号を処理する制御信号処理部と、
放送番組の各コンポーネントのストリームを処理するストリーム処理部と、
を具備し、
前記制御信号処理部は、受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得し、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理する、
受信装置である。
トランスポート層にIP方式を適用した放送信号を受信する受信方法であって、
受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得するステップ、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理するステップと、
を有する受信方法である。
放送信号に含まれる制御信号を処理する制御信号処理部、
放送番組の各コンポーネントのストリームを処理するストリーム処理部、
として機能させ、
前記制御信号処理部は、受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得し、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理する、
コンピューター・プログラムである。
図1には、本明細書で開示する技術を適用することができるディジタル放送システム100の構成例を模式的に示している。図示のディジタル放送システム100では、地上波又は衛星波を用いたテレビ受像機130向けのディジタル・テレビ放送サービス110と、携帯電話140などの携帯端末向け放送サービス120が行なわれている。携帯端末向け放送信号121は、ディジタル・テレビ放送信号111に重畳して送信されることもある。放送信号には、映像ストリームや音声ストリーム、字幕ストリームなどの番組本体を構成するコンポーネントや、番組情報やその他の各種のデータ放送用データが含まれている。本実施形態に係るディジタル放送システム100は、トランスポート層にIP方式を採用するものとする。
受信装置300は、使用開始時などにおいて、初期スキャンを行ない、ネットワーク情報を取得する。図4には、受信装置300が初期スキャンを行なう仕組みを模式的に示している。受信装置300内の低レイヤー制御信号処理部312が、各放送局に割り当てられた放送周波数帯(物理チャンネル)毎にスキャンを実行して、ネットワーク情報、トランスポート・ストリーム情報、チャンネル情報を取得して、NVRAM313に記録する。
本実施形態では、テレビ放送の番組表若しくは番組情報の表示形式として、ESGを採用する。ESGは、その構造が統一されたXMLフォーマットであり(使用されるタグを含む)、また、放送サービスに合わせて記述できる情報が定義されており、それらの要素をサービスに合わせて選択できることから、画面サイズや処理性能の異なるさまざまな機器に対して、一元的に番組情報を提供し表示することができる。
本実施形態では、テレビ放送の番組表若しくは番組情報の表示形式として、ESGを採用する。ESGは、その構造が統一されたXMLフォーマットであり(使用されるタグを含む)、また、放送サービスに合わせて記述できる情報が定義されており、それらの要素をサービスに合わせて選択できることから、画面サイズや処理性能の異なるさまざまな機器に対して、一元的に番組情報を提供し表示することができる。
(1)トランスポート層にIP(Internet Protocol)方式を適用し、トランスポート・ストリームで送るSSC(Service Signaling Channel)にSDP(Service Description Protocol)のテーブル(SDPT)を配置した放送信号を送信する、
送信装置。
(2)SDPTをセクション形式で表記し、そのヘッダー拡張部分にサービス識別情報及びSDPを配置する、
上記(1)に記載の送信装置。
(3)SDPTに配置するSDPに、サービス識別情報に対応する放送チャンネルの各コンポーネントのIPアドレス、ポート番号、コンポーネントの属性情報を含める、
上記(1)に記載の送信装置。
(4)ESG(Electronic Service Guide)を用いて放送の番組表若しくは番組情報の表示形式を送信する、
上記(1)に記載の送信装置。
(5)ESG内部にSDPのURIを記述するとともに、SSCとして伝送するSDPTにもSDPのURIを記述する、
上記(4)に記載の送信装置。
(6)受信側が初期スキャンで取得するシグナリング内にESGのブートストラップを記述する、
上記(1)に記載の送信装置。
(7)トランスポート層にIP方式を適用し、トランスポート・ストリームで送るSSCにSDPTを配置した放送信号を送信する、
送信方法。
(8)トランスポート層にIP方式を適用した放送信号を受信する受信装置であって、
放送信号に含まれる制御信号を処理する制御信号処理部と、
放送番組の各コンポーネントのストリームを処理するストリーム処理部と、
を具備し、
前記制御信号処理部は、受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得し、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理する、
受信装置。
(9)放送信号の低レイヤーの処理を行なう低レイヤー制御信号処理部と、データを記録する記録部をさらに備え、
前記低レイヤー制御信号処理部は、初期スキャンして、ESGのブートストラップを含むシグナリングを取得して前記記録部に記録する、
上記(8)に記載の受信装置。
(10)ESGを処理するESG処理部をさらに備え、
ESGの表示を行なう際に、前記制御信号処理部は、前記記録部に記録されたシグナリングからESGのブートストラップを取得し、前記ESG処理部はブートストラップに基づいてESGのファイルを取得する、
上記(9)に記載の受信装置。
(11)前記制御信号処理部は、ESGからSDPを参照する場合に、ESG内部に記述されたSDPのURIに基づいてSSC中から該当するSDPTを特定し、そのSDPT内からSDPを取得する、
上記(10)に記載の受信装置。
(12)トランスポート層にIP方式を適用した放送信号を受信する受信方法であって、
受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得するステップ、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理するステップと、
を有する受信方法。
(13)トランスポート層にIP方式を適用した放送信号を受信する受信装置としてコンピューターを機能させるようにコンピューター可読形式で記述されたコンピューター・プログラムであって、前記コンピューターを
放送信号に含まれる制御信号を処理する制御信号処理部、
放送番組の各コンポーネントのストリームを処理するストリーム処理部、
として機能させ、
前記制御信号処理部は、受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得し、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理する、
コンピューター・プログラム。
110…ディジタル・テレビ放送サービス
120…携帯端末向け放送サービス
130…テレビ受像機、131…記録装置、140…携帯電話
150…ストリーミング・サーバー、160…アプリケーション・サーバー
170…インターネット、180…LAN
181…エッジ・ルーター、182…ONU
301…放送チューナー、302…通信インターフェース
303…IP層処理部、304…UDP層処理部、305…制御信号処理部
306…FLUTE処理部、307…RTP/RTCP処理部
308…NTP処理部、309…TCP層処理部、310…HTTP処理部
311…CAS/DRM処理部、312…低レイヤー制御信号処理部
313…NVRAM、314…外部出力インターフェース
315…ESG処理部、316…ブラウザー、317…映像デコーダー
318…音声デコーダー、319…字幕デコーダー
320…クロック処理部、321…記憶部
Claims (13)
- トランスポート層にIP(Internet Protocol)方式を適用し、トランスポート・ストリームで送るSSC(Service Signaling Channel)にSDP(Service Description Protocol)のテーブル(SDPT)を配置した放送信号を送信する、
送信装置。 - SDPTをセクション形式で表記し、そのヘッダー拡張部分にサービス識別情報及びSDPを配置する、
請求項1に記載の送信装置。 - SDPTに配置するSDPに、サービス識別情報に対応する放送チャンネルの各コンポーネントのIPアドレス、ポート番号、コンポーネントの属性情報を含める、
請求項1に記載の送信装置。 - ESG(Electronic Service Guide)を用いて放送の番組表若しくは番組情報の表示形式を送信する、
請求項1に記載の送信装置。 - ESG内部にSDPのURIを記述するとともに、SSCとして伝送するSDPTにもSDPのURIを記述する、
請求項4に記載の送信装置。 - 受信側が初期スキャンで取得するシグナリング内にESGのブートストラップを記述する、
請求項1に記載の送信装置。 - トランスポート層にIP方式を適用し、トランスポート・ストリームで送るSSCにSDPTを配置した放送信号を送信する、
送信方法。 - トランスポート層にIP方式を適用した放送信号を受信する受信装置であって、
放送信号に含まれる制御信号を処理する制御信号処理部と、
放送番組の各コンポーネントのストリームを処理するストリーム処理部と、
を具備し、
前記制御信号処理部は、受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得し、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理する、
受信装置。 - 放送信号の低レイヤーの処理を行なう低レイヤー制御信号処理部と、データを記録する記録部をさらに備え、
前記低レイヤー制御信号処理部は、初期スキャンして、ESGのブートストラップを含むシグナリングを取得して前記記録部に記録する、
請求項8に記載の受信装置。 - ESGを処理するESG処理部をさらに備え、
ESGの表示を行なう際に、前記制御信号処理部は、前記記録部に記録されたシグナリングからESGのブートストラップを取得し、前記ESG処理部はブートストラップに基づいてESGのファイルを取得する、
請求項9に記載の受信装置。 - 前記制御信号処理部は、ESGからSDPを参照する場合に、ESG内部に記述されたSDPのURIに基づいてSSC中から該当するSDPTを特定し、そのSDPT内からSDPを取得する、
請求項10に記載の受信装置。 - トランスポート層にIP方式を適用した放送信号を受信する受信方法であって、
受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得するステップ、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理するステップと、
を有する受信方法。 - トランスポート層にIP方式を適用した放送信号を受信する受信装置としてコンピューターを機能させるようにコンピューター可読形式で記述されたコンピューター・プログラムであって、前記コンピューターを
放送信号に含まれる制御信号を処理する制御信号処理部、
放送番組の各コンポーネントのストリームを処理するストリーム処理部、
として機能させ、
前記制御信号処理部は、受信するトランスポート・ストリームに対してセクション・フィルタリング処理を行なって、SSCから所望のSDPTを取得し、
前記ストリーム処理部は、前記取得したSDPTのヘッダー拡張部分に格納されたSDP内に記述されているIPアドレス及びポート番号に基づいて、所望のチャンネルのストリームを処理する、
コンピューター・プログラム。
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EP14851352.6A EP3054691A4 (en) | 2013-10-02 | 2014-06-23 | Transmission device, transmission method, reception device, reception method, and computer program |
CN201480053287.2A CN105594217B (zh) | 2013-10-02 | 2014-06-23 | 发送装置、发送方法、接收装置、接收方法及计算机程序 |
MX2016003751A MX2016003751A (es) | 2013-10-02 | 2014-06-23 | Dispositivo de transmision, metodo de transmision, dispositivo de recepcion, metodo de recepcion y programa de computadora. |
US15/023,723 US10735787B2 (en) | 2013-10-02 | 2014-06-23 | Transmission device, transmission method, reception device, reception method, and computer program |
CA2925449A CA2925449C (en) | 2013-10-02 | 2014-06-23 | Transmission device, transmission method, reception device, reception method, and computer program |
KR1020167007677A KR102190277B1 (ko) | 2013-10-02 | 2014-06-23 | 송신 장치 및 송신 방법, 수신 장치 및 수신 방법, 및 컴퓨터 프로그램 |
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US20200304847A1 (en) | 2020-09-24 |
US11336933B2 (en) | 2022-05-17 |
KR102190277B1 (ko) | 2020-12-11 |
US20160234534A1 (en) | 2016-08-11 |
KR20160065097A (ko) | 2016-06-08 |
CN105594217B (zh) | 2020-05-19 |
JP2015073197A (ja) | 2015-04-16 |
CA2925449A1 (en) | 2015-04-09 |
CA2925449C (en) | 2022-03-29 |
CN105594217A (zh) | 2016-05-18 |
MX2016003751A (es) | 2016-07-08 |
US10735787B2 (en) | 2020-08-04 |
MX2020009638A (es) | 2020-10-08 |
EP3054691A1 (en) | 2016-08-10 |
EP3054691A4 (en) | 2017-04-19 |
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