JP2014060625A - Video signal transmission method, video signal receiver, and video signal reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video signal transmission method, video signal receiver, and video signal reception method, capable of effectively increasing transmission efficiency in distributing a video signal corresponding to super-high definition and further improving the reliability of a video signal to be transmitted for feasibility.SOLUTION: In the video signal transmission method, control information addition means (30, 37, 43, 44) add each of control information for mutual correlation with first and second video signals and transmission means (39, 46) transmit each of the first and second video signals to which control information is added.

Description

  Embodiments described herein relate generally to a video signal transmitting method, a video signal receiving apparatus, and a video signal receiving method capable of transmitting a high-definition video signal.

  As is well known, a high-definition digital television broadcast receiving apparatus that is currently popular for general households is called 2K1K, which has 1920 pixels in the horizontal direction and 1080 pixels in the vertical direction. HDTV (high-definition television), which can display high-definition video, has become the mainstream.

  On the other hand, currently, there are 3840 pixels in the horizontal direction and 2160 pixels in the vertical direction, an image having a resolution four times that of an HDTV called 4K2K, and 7320 pixels in the horizontal direction and 4320 pixels in the vertical direction. The development of UHDTV (Ultra HDTV) capable of displaying ultra-high-definition video such as video having a resolution 16 times that of HDTV, which is called 8K4K, has been actively carried out.

  By the way, such ultra-high-definition video display technology is still in the development stage, and it is strongly requested to develop in detail so that it is suitable for practical use in consideration of convenience for users. Has been. In particular, when distributing video signals with a large amount of information corresponding to ultra-high definition in a limited transmission path band, not only increase the transmission efficiency, but also enable reliable transmission. It is an important issue.

JP 2010-011154 A

  Video that can effectively improve the transmission efficiency when distributing video signals that support ultra-high definition, and that can further improve the reliability of transmitted video signals, making it suitable for practical use It is an object of the present invention to provide a signal transmission method, a video signal receiving apparatus, and a video signal receiving method.

  According to the embodiment, in the video signal transmission method, the control information adding unit adds control information for associating the first and second video signals with each other, and the transmission unit controls the control information. The first and second video signals to which are added are transmitted.

The block block diagram shown in order to demonstrate roughly an example of the content delivery system as embodiment. The block block diagram shown in order to demonstrate an example of the video signal processing part in the broadcasting station which comprises the content delivery system in the embodiment. The block block diagram shown in order to demonstrate an example of the content processing part in the broadcasting station in the embodiment. The figure shown in order to demonstrate an example of the control information newly added in the broadcasting station in the embodiment. The block block diagram shown in order to demonstrate roughly an example of the receiving terminal which comprises the content delivery system in the embodiment. The block block diagram shown in order to demonstrate an example of the content restoration process part which comprises the receiving terminal in the embodiment. The block block diagram shown in order to demonstrate an example of the image restoration process part which comprises the receiving terminal in the embodiment. The figure shown in order to demonstrate the other example of the control information newly added in the broadcasting station in the embodiment. The figure shown in order to demonstrate in detail another example of the control information newly added in the broadcasting station in the embodiment. The figure shown in order to demonstrate in detail another example of the control information newly added in the broadcasting station in the embodiment. The figure shown in order to demonstrate in detail another example of the control information newly added in the broadcasting station in the embodiment. The flowchart shown in order to demonstrate a part of example of main processing operations which the receiving terminal in the embodiment performs. The flowchart shown in order to demonstrate the remainder of an example of main processing operations which the receiving terminal in the embodiment performs.

  Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 schematically shows an example of a content distribution system 11 described in this embodiment. First, in the content distribution system 11, program content distributed from a broadcasting station 12 using a broadcast wave as a medium is received by a receiving terminal 13 and used for video display, audio reproduction, and the like.

  In the content distribution system 11, program content is supplied from the broadcast station 12 to the server 14 by wire or wireless communication and stored. The receiving terminal 13 communicates with the server 14 via a LAN (local area network) router 15 capable of wired or wireless communication, for example, a network circuit network 16 including a fixed IP (internet protocol) communication network, and a gateway 17. It is accessible.

  As a result, the receiving terminal 13 requests the server 14 to obtain a program content distributed from the server 14 based on a preset program distribution schedule and perform video display, audio reproduction, and the like. A so-called VOD (video on demand) function or the like that acquires program content and performs video display, audio playback, or the like can be realized.

  2 and 3 each show an example of a transmission signal processing system for the broadcast station 11 to perform transmission processing on program content to be broadcast or communicated. Among these, FIG. 2 shows an example of the video signal processing unit 18 that performs signal processing for transmission on the video signals constituting the program content.

  That is, the video signal processing unit 18 includes an input terminal 19 to which an original video signal, for example, a 4K2K compatible video signal is supplied. The 4K2K-compatible video signal supplied to the input terminal 19 is supplied to the 4K / 2K conversion unit 20 and down-converted to a 2K1K-compatible video signal, and then extracted from the output terminal 21.

  The 2K1K-compatible video signal output from the 4K / 2K conversion unit 20 is supplied to the 2K / 4K conversion unit 22 and up-converted into a 4K2K-compatible video signal. A difference signal from the 4K2K compatible video signal supplied to is generated. This difference signal is taken out from the output terminal 24.

  That is, the video signal processor 18 downconverts the 4K2K compatible original video signal, the 2K1K compatible video signal, and the 4K2K compatible video signal and the original video signal obtained by upconverting the 2K1K compatible video signal. The difference signal is output separately.

  FIG. 3 shows an example of a content processing unit 25 that performs signal processing for transmission on the program content including the 2K1K compatible video signal and the difference signal separated by the video signal processing unit 18. That is, the content processing unit 25 includes input terminals 26 and 27 to which a 2K1K-compatible video signal and a difference signal output from the video signal processing unit 18 are respectively supplied.

  Among these, the 2K1K-compliant video signal supplied to the input terminal 26 is supplied to a moving picture experts group (MPEG) 2 encoding unit 28 and subjected to encoding processing, and a PES (packetized elementary stream) conversion processing unit 29. After being subjected to PES packetization processing, the data is supplied to the multiplexing processing unit 30.

  The content processing unit 25 includes an input terminal 31 to which an audio signal that constitutes program content is supplied. The audio signal supplied to the input terminal 31 is subjected to encoding processing by the audio encoding unit 32, subjected to PES packetization processing by the PES processing unit 33, and then supplied to the multiplexing processing unit 30.

  Further, the content processing unit 25 includes an input terminal 34 to which caption / character super information constituting the program content is supplied. The caption / character super information supplied to the input terminal 34 is subjected to PES packetization processing by the PES processing unit 35 and then supplied to the multiplexing processing unit 30.

  The content processing unit 25 includes an input terminal 36 to which program related information constituting the program content is supplied. The program related information supplied to the input terminal 36 is supplied to a PSI (program specific information) / SI (service information) information generation unit 37 to be used for generating PSI / SI information.

  That is, the PSI / SI information generating unit 37 mainly exchanges video signals, audio signals, subtitle / character super information, etc. supplied to the input terminals 26, 31, and 34 as multiplexed transmission control information for each program. PSI for performing correlation, demultiplexing the constituent signals of the selected program at the time of reception and reproduction, and controlling so that each signal is synchronously reproduced at the correct timing, and SI information that is information related to the channel to be transmitted and the program Is generated.

  Further, in the PSI / SI information generation unit 37, as will be described in detail later, in the PMT (program map table) information described in the PSI information, the 2K1K compatible video signal supplied to the input terminal 26 is Control information for associating with the differential signal supplied to the input terminal 27 is newly defined and described.

  The PSI / SI information generated by the PSI / SI information generation unit 37 is supplied to the sectioning processing unit 38 and sectioned, and then supplied to the multiplexing processing unit 30.

  Here, the multiplexing processing unit 30 is a video signal, audio signal and subtitle / character super information output from the PES processing units 29, 33, and 35, and PSI / SI information output from the sectioning processing unit 38. Are multiplexed into a TS packet to generate a TS (transport stream).

  Then, the TS generated by the multiplexing processing unit 30 is supplied to the transmission line encoding unit 39 and subjected to modulation and error correction encoding processing corresponding to the transmission line, and then taken out from the output terminal 40. It is used for broadcasting on a predetermined first channel.

  Further, the differential signal supplied to the input terminal 27 is supplied to a HEVC (high efficiency video coding) encoding unit 41 and subjected to encoding processing, and after being subjected to PES packetization processing by the PES processing unit 42, The data is supplied to the multiplexing processing unit 43.

  Further, the program related information supplied to the input terminal 35 is supplied to another PSI / SI information generation unit 44. This PSI / SI information generation unit 44 uses the differential signal supplied to the input terminal 27 in the PMT information in addition to the multiplexed transmission control information of the differential signal, and the 2K1K compatible video supplied to the input terminal 26. Control information to be associated with a signal is newly defined and described.

  The PSI / SI information generated by the PSI / SI information generation unit 44 is supplied to the sectioning processing unit 45 and sectioned, and then supplied to the multiplexing processing unit 43.

  Here, the multiplexing processing unit 43 multiplexes the differential signal output from the PES processing unit 42 and the PSI / SI information output from the sectioning processing unit 45 by TS packet generation to generate a TS. Then, the TS generated by the multiplexing processing unit 43 is supplied to the transmission line encoding unit 46 and subjected to the encoding process corresponding to the transmission line. It is used for broadcasting on the channel.

  FIG. 4 shows an example of the data structure of the control information newly defined and described in the PMT information in the PSI / SI information generation unit 37. That is, this control information is newly defined with the name “extended_component_descriptor ()”, and is described and transmitted in the second descriptor area “descriptor ()” of the PMT corresponding to the video signal supplied to the input terminal 26. Is done.

  The following are assumed as specific examples of contents.

  First, “complementary_component_flag” is a 1-bit flag, and is attribute information indicating whether or not the video signal of the component can be reproduced independently. For example, “0” indicates that a meaningful reproduction as a service is possible, and “1” indicates that a meaningful reproduction as a service is possible only when another component is used.

  Further, “ref_transport_stream_id” is a 16-bit field, and is reference information indicating an identifier “transport_stream_id” of a TS in which a 2K1K compatible video signal that constitutes the component transmits a reference target component (difference signal). is there.

  Further, “ref_program_number” is a 16-bit field, and is reference information indicating “program_number” of a TS in which a 2K1K compatible video signal constituting the component transmits a component (difference signal) to be referred to. .

  Further, “ref_component_tag” is an 8-bit field, and is reference information indicating a tag value of a component (difference signal) to which a 2K1K compatible video signal constituting the component is referred.

  That is, for the 2K1K compatible video signal generated by the video signal processing unit 18, the related video signal is transmitted separately by arranging this descriptor in the PMT. By transmitting as complementary_component_flag = 0, it indicates that this component can be played back independently (2K1K), and reference information indicating the acquisition location of the component (difference signal) that is the reference target during 4K2K playback. Is newly added for broadcasting.

  In addition, even for the differential signal generated by the video signal processing unit 18, it is indicated that related video information is separately transmitted by arranging this descriptor in the PMT. Transmitting as complementary_component_flag = 1 indicates that this component cannot be reproduced independently, and reference information indicating the acquisition location of the component (2K1K compatible video signal) to be referred to when this component is 4K2K playback Will be newly added for broadcasting.

  The reference information includes a distribution type, a distribution schedule, a URI (which indicates in what form the component to be referred to is distributed, that is, in which form broadcast, network, storage media, file format, etc. uniform resource identifier), information indicating the billing type, etc. may be included.

  FIG. 5 schematically shows an example of the signal processing system of the receiving terminal 13. That is, the broadcast signal received by the antenna 48 is supplied to the tuner unit 50 via the input terminal 49, so that the broadcast signal of a desired channel is selected. The broadcast signal selected by the tuner unit 50 is supplied to the signal processing unit 51.

  As will be described in detail later, the signal processing unit 51 performs a decoding process on the input broadcast signal to restore the video signal, the audio signal, the caption / text super information, and the program related information. When the video signal is separated into a 2K1K compatible video signal and a differential signal, a process for restoring the original 4K2K compatible video signal from these signals is also performed. The signal processing unit 51 outputs the restored video signal to the synthesis processing unit 52, and outputs the restored audio signal to the audio processing unit 53.

  Among these, the synthesis processing unit 52 superimposes and outputs an OSD (on screen display) signal on the video signal supplied from the signal processing unit 51. The video signal output from the synthesis processing unit 52 is supplied to the video processing unit 54 and converted into a format that can be displayed on a flat-type video display unit 56 having a liquid crystal display panel, for example, at a later stage. The video signal is supplied to the video display unit 56 via the output terminal 55 and used for video display.

  The audio processing unit 53 converts the input audio signal into an audio signal in a format that can be reproduced by the speaker 58 at the subsequent stage. Then, the audio signal output from the audio processing unit 53 is supplied to the speaker 58 via the output terminal 57 to be used for audio reproduction.

  Here, in the receiving terminal 13, various operations including the various receiving operations described above are comprehensively controlled by the control unit 59. The control unit 59 includes a CPU (central processing unit) 59 a and is transmitted from the operation unit 60 provided in the main body of the receiving terminal 13 or transmitted from the remote controller 61 and received by the receiving unit 62. By receiving the operation information, each part is controlled so that the operation content is reflected.

  In this case, the control unit 59 uses the memory unit 59b. This memory unit 59b mainly includes a ROM (read only memory) storing a control program executed by the CPU 59a, a RAM (random access memory) for providing a work area to the CPU 59a, various setting information and control information. And so on.

  Further, an HDD (hard disk drive) 63 is connected to the control unit 59. The control unit 59 controls the video signal and audio signal obtained from the signal processing unit 51 to be supplied to the HDD 63 and recorded on the hard disk 63a based on the operation of the operation unit 60 and the remote controller 61 by the user. Can do.

  Further, the control unit 59 reads the video signal and the audio signal from the hard disk 63a by the HDD 63 based on the operation of the operation unit 60 and the remote controller 61 by the user and supplies them to the signal processing unit 51. It can be controlled to be used for the above-described video display and audio reproduction.

  Further, a network interface 64 is connected to the control unit 59. The network interface 64 is connected to the LAN router 15 so as to be able to transmit information. Therefore, the control unit 59 accesses the server 14 via the LAN router 15, the network circuit network 16, and the gateway 17 based on the operation of the operation unit 60 and the remote controller 61 by the user, and the program content provided there is displayed. You can get it.

  Needless to say, video signals, audio signals, and the like constituting the program content acquired from the server 14 are also used for the above-described video display and audio reproduction, and are used for recording / reproduction on the hard disk 63a by the HDD 63. That is.

  6 and 7 show examples of signal processing means in the signal processing unit 51, respectively. Among these, FIG. 6 illustrates an example of a content restoration processing unit 65 that performs a decoding process on the broadcast signal selected by the tuner unit 50 and restores a video signal, an audio signal, caption / text super information, and program-related information. Show.

  That is, the content restoration processing unit 65 is configured to multiplex a broadcast signal broadcast on the first channel, that is, a 2K1K compatible video signal, audio signal, subtitle / text super information, and PSI / SI information. An input terminal 66 to which a signal subjected to transmission line encoding processing is supplied is provided. In addition, the content restoration processing unit 65 is supplied with a signal obtained by performing transmission path coding processing on a broadcast signal broadcast on the second channel, that is, a TS in which a differential signal and PSI / SI information are multiplexed. The input terminal 67 is provided. In this case, the tuner unit 50 switches between the first and second channels in a time division manner and selects a channel.

  Then, the broadcast signal supplied to the input terminal 66 is supplied to the transmission path decoding unit 68 and subjected to transmission path decoding processing such as demodulation and error correction decoding, whereby the encoding processing corresponding to the transmission path is solved. The subsequent TS is supplied to the demultiplexing unit 69. The demultiplexing unit 69 demultiplexes the input TS into 2K1K compatible video signals, audio signals, subtitle / character super information, and PSI / SI information.

  Among these, the 2K1K-compatible video signal is supplied to the depacket processing unit 70 to be packetized, decoded by the MPEG2 decoding unit 71, and taken out from the output terminal 72. Also, the audio signal is supplied to the depacket processing unit 73, packetized, and decoded by the audio decoding unit 74, and then taken out from the output terminal 75. Further, the subtitle / character super information is supplied to the depacket processing unit 76 to be packetized and then taken out from the output terminal 77. Further, the PSI / SI information is supplied to the section restoring unit 78 and sectioned, and is taken out from the output terminal 79.

  On the other hand, the broadcast signal supplied to the input terminal 67 is supplied to the transmission path decoding unit 80 and subjected to transmission path decoding processing, whereby the TS after the encoding processing corresponding to the transmission path is solved is multiplexed. Is supplied to the chemical separation unit 81. The demultiplexing unit 81 demultiplexes the input TS into a differential signal and PSI / SI information.

  Of these, the PSI / SI information is supplied to the section restoring unit 82 and sectioned, and is taken out from the output terminal 83. Further, the differential signal is supplied to the depacket processing unit 84, packetized, and decoded by the HEVC decoding unit 85, and then taken out from the output terminal 86.

  FIG. 7 shows an example of a video restoration processing unit 87 that restores the original 4K2K video signal from the 2K1K video signal restored by the content restoration processing unit 65 and the difference signal. That is, the video restoration processing unit 87 includes input terminals 88 and 89 to which a 2K1K compatible video signal and a difference signal output from the content restoration processing unit 65 are respectively supplied.

  Among these, the 2K1K compatible video signal supplied to the input terminal 88 is supplied to the 2K / 4K conversion unit 90 and up-converted to a 4K2K compatible video signal. Then, the 4K2K-compatible video signal output from the 2K / 4K conversion unit 90 is combined with the difference signal supplied to the input terminal 89 by the combining unit 91, and the original 4K2K-compatible video signal is restored here. Then, it is taken out from the output terminal 92.

  The synthesizing unit 91 uses, for example, a PTS (presentation time stamp) or the like for the 4K2K compatible video signal up-converted by the 2K / 4K converting unit 90 and the differential signal output from the HEVC decoding unit 34. It is necessary to synthesize in a synchronized state.

  According to the above-described embodiment, the broadcast station 11 does not simply encode and broadcast a 4K2K compatible video signal, but encodes and broadcasts a 2K1K compatible video signal obtained by down-converting a 4K2K compatible original video signal. At the same time, the difference signal between the 4K2K video signal and the original video signal obtained by up-converting the 2K1K video signal is encoded and broadcast. As a result, it is possible to increase the transmission efficiency when distributing a video signal corresponding to 4K2K, that is, corresponding to ultra-high definition.

  In addition, for 2K1K-compatible video signals and differential signals to be broadcast, attribute information indicating whether the component can be reproduced independently or by using other components, and when the component is reproduced, Reference information indicating the acquisition location of the component to be referenced is newly defined and described in the PMT information included in the PSI / SI information.

  For this reason, the receiving terminal 13 can determine whether or not another component is necessary to reproduce the broadcast signal by checking the attribute information for the received broadcast signal. As a result, for example, it is possible to avoid the inconvenience that the reproduction process is performed only on the difference signal, and it is possible to perform the transmission with higher reliability with respect to the video signal.

  In addition, the receiving terminal 13 can appropriately perform processing for acquiring other components to be referred to by confirming reference information for the received broadcast signal. For example, when it is found from the reference information that either the 2K1K compatible video signal or the difference signal is distributed in the file format, the file acquisition process can be prioritized. Further, when another signal is streamed before the file acquisition is completed, this signal can be stored in the HDD 63.

  Here, in the above-described embodiment, control information such as attribute information and reference information relating to a 2K1K video signal and a difference signal is newly added to the PMT information described in the PSI information of the PSI / SI information. Although defined and described, such transmission information is newly defined and described in EIT (event information table) information described in SI information of PSI / SI information. Is also good.

  FIG. 8 shows an example of the data structure of the control information newly defined and described in the EIT information included in the SI information of the PSI / SI information. In other words, this control information may be newly defined with the name “extended_service_descriptor ()”, described in the EIT descriptor area “descriptor ()”, and transmitted.

  The following are assumed as specific examples of contents.

  First, “extended_service_type” is an 8-bit field, and indicates the type of extended service, as shown in FIG. Further, “return_to_brodcast_flag” is a 1-bit flag and indicates whether or not it is necessary to transition to broadcasting after the communication content reproduction is completed. For example, “0” indicates that the return is not necessary, and “1” indicates that the broadcast service before the transition to the communication content is returned.

  Further, “delivery_type” is a 1-bit flag and indicates a delivery method of delivery content. For example, “0” indicates streaming and “1” indicates download. Further, “contract_flag” is a 1-bit flag and indicates whether or not a contract is necessary for receiving and reproducing the distribution content. For example, “0” indicates unnecessary and “1” indicates required. Furthermore, “start_time_offset_polarity” indicates the polarity of the offset time from the start of broadcasting of the next program to the start of playback of communication content. For example, “0” indicates that the offset time is advanced, and “1” indicates that the offset time is delayed.

  “Start_time_offset” is a 16-bit field that specifies an offset time from the start of broadcast of program content to the start of playback of communication content in a range of −12 hours to +12 hours. The offset time is coded in 4 bits binary decimal number (BCD), each of 10 hours, 1 hour, 10 minutes, and 1 minute.

  Furthermore, “expiration_date” is a 40-bit field indicating the reproduction time limit of the communication content. In this field, the lower 16 bits of MJB are encoded with 16 bits, and the subsequent 24 bits are encoded with 6 4-bit binary coded decimal numbers (BCD). If the playback time limit is not defined, all bits in this field are set to “1”.

  Next, as an example of the format information, the following is assumed.

  First, “extended_video_resolution_format_flag” is a 1-bit flag and indicates whether or not the distribution content has a video resolution extended from the current broadcast specification. For example, “0” indicates no extension (conforms to the current broadcast specification), and “1” indicates extension. Further, “extended_video_resolution_format” is an 8-bit field, and indicates video resolution information extended from the current broadcast specification, as shown in FIG.

  Furthermore, “3D_video_format_flag” is a 1-bit flag and indicates whether or not the distribution content includes 3D video. For example, “0” indicates that no 3D (dimension) video is included, and “1” indicates that a 3D video is included. “3D_video_format” is an 8-bit field and indicates 3D video format identification information as shown in FIG. 11 as an example.

  12 and 13 show a case where newly defined control information having a data structure as shown in FIG. 8 is described in the EIT information included in the SI information of the PSI / SI information. 4 shows a flowchart summarizing an example of main processing operations performed by the control unit 59 of the receiving terminal 13.

  That is, when the process is started (step S11), the control unit 59 refers to “expiration_date” in the EIT information in step S12, and determines whether or not the content is within the reproduction deadline in step S13. . If it is determined that the playback time limit is reached (YES), the control unit 59 refers to “3D_video_format” in the EIT information in step S14, and whether or not the content corresponds to 3D video in step S15. Is determined.

  If it is determined that the 3D video is supported (YES), the control unit 59 refers to “extended_video_resolution_format” in the EIT information in step S16, and whether the content is 4K2K compatible in step S17. Determine whether or not. If it is determined that the 4K2K is supported (YES), the control unit 59 refers to “contract_flag” in the EIT information in step S18.

  After this step S18, when it is determined in step S13 that it is not within the playback deadline (NO), or when it is determined in step S15 that it does not support 3D video (NO), or If it is determined in step S17 that it is not 4K2K compatible (NO), the control unit 59 determines in step S19 whether or not entry has been completed. If it is determined that entry has not been completed (NO), step S20 is performed. Thus, the process proceeds to the next entry, and the process returns to step S12.

  If it is determined in step S19 that the entry has been completed (YES), the control unit 59 determines whether or not the target content exists in step S21, and if it is determined that the target content does not exist (NO). In step S22, a message indicating that the target content is not distributed is displayed on the video display unit 56, and the process ends (step S23).

  On the other hand, when it is determined in step S21 that the target content exists (YES), the control unit 59 displays the target content selection screen on the video display unit 56 in step S24, and whether the content is selected in step S25. Determine whether or not.

  If it is determined that the content has been selected (YES), the control unit 59 refers to “start_time_offset” and “start_time_offset_polarity” in the EIT information in step S26, performs time measurement in step S27, and in step S28. It is determined whether or not the offset time has elapsed.

  If it is determined that the offset time has elapsed (YES), the control unit 59 refers to the URI of the target content described in the EIT information in step S29, and in step S30, “ With reference to “delivery_type”, in step S31, the selected target content is accessed, and this content is acquired and reproduced.

  In the above-described embodiment, the case of differential transmission of a 4K2K compatible video signal is described. However, the original video signal is not limited to the 4K2K video format. For example, the present invention may be applied to 6K3K or 8K4K compatible video signals. Also, the applied video encoding method is not limited to MPEG2 or HEVC.

  Furthermore, it is not limited to the difference, and can be applied to divided transmission in general. That is, for example, the above-described embodiment can also be applied to the case where 3D (dimension) display is performed using two video signals of a right-eye video signal and a left-eye video signal.

  In this case, as the first 3D system, the first video signal is the left-eye video signal, the second video signal is the right-eye video signal, and when performing 2D display, one video signal is displayed in 3D. In some cases, both video signals are displayed. As the second 3D method, when the first video signal is a left-eye video signal, the second video signal is a differential signal for generating a right-eye video signal from the first video signal, and 2D display is performed In the case of the first video signal and 3D display, both video signals are displayed.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 11 ... Content distribution system, 12 ... Broadcasting station, 13 ... Receiving terminal, 14 ... Server, 15 ... LAN router, 16 ... Network line network, 17 ... Gateway, 18 ... Video signal processing part, 19 ... Input terminal, 20 ... 4K / 2K conversion unit, 21 ... output terminal, 22 ... 2K / 4K conversion unit, 23 ... subtraction unit, 24 ... output terminal, 25 ... content processing unit, 26, 27 ... input terminal, 28 ... MPEG2 encoding unit, 29 ... PES processing unit, 30 ... multiplex processing unit, 31 ... input terminal, 32 ... voice encoding unit, 33 ... PES processing unit, 34 ... input terminal, 35 ... PES processing unit, 36 ... input terminal, 37 ... PSI / SI information generation unit, 38 ... sectioning processing unit, 39 ... transmission line encoding unit, 40 ... output terminal, 41 ... HEVC encoding unit, 42 ... PES processing unit, 43 ... multiplexing processing unit, 44 ... P I / SI information generation unit, 45 ... sectioning processing unit, 46 ... transmission line coding unit, 47 ... output terminal, 48 ... antenna, 49 ... input terminal, 50 ... tuner unit, 51 ... signal processing unit, 52 ... synthesis Processing unit 53 ... Audio processing unit 54 ... Video processing unit 55 ... Output terminal 56 ... Video display unit 57 ... Output terminal 58 ... Speaker 59 ... Control unit 59a ... CPU 59b ... Memory unit 60 ... Operation unit 61 ... Remote controller 62 ... Receiving unit 63 ... HDD 63a ... Hard disk 64 ... Network interface 65 ... Content restoration processing unit 66,67 ... Input terminal 68 ... Transmission path decoding unit 69 ... Demultiplexing unit, 70... Depacket processing unit, 71... MPEG2 decoding unit, 72... Output terminal, 73... Depacket processing unit, 74. DESCRIPTION OF SYMBOLS ... Depacket processing unit, 77 ... Output terminal, 78 ... Section restoration unit, 79 ... Output terminal, 80 ... Transmission path decoding unit, 81 ... Demultiplexing unit, 82 ... Section restoration unit, 83 ... Output terminal, 84 ... Depacket processing 85, HEVC processing unit, 86 ... output terminal, 87 ... video restoration processing unit, 88, 89 ... input terminal, 90 ... 2K / 4K conversion unit, 91 ... synthesis unit, 92 ... output terminal.

Claims (11)

The control information adding means adds control information for associating the first and second video signals with each other,
A video signal transmission method in which the first and second video signals to which the control information is added are respectively transmitted by a transmission means.   The first video signal is a signal obtained by down-converting the original video signal, and the second video signal is a difference signal between the signal obtained by up-converting the first video signal and the original video signal. The video signal transmitting method according to claim 1.   2. The video signal transmission method according to claim 1, wherein the control information adding means adds attribute information indicating whether or not each of the first and second video signals can be reproduced independently.   2. The video signal transmission method according to claim 1, wherein the control information adding means adds reference information for indicating information to be referred to during reproduction to the first and second video signals.   The control information adding means is multiplexed in the PMT information in the PSI information multiplexed for the first and second video signals, and for the first and second video signals, respectively. The video signal transmission method according to claim 1, wherein the control signal is described in any one of the EIT information in the PSI / SI information. Input means for inputting the first and second video signals;
The first and second video signals are associated with each other based on control information added to the first and second video signals input to the input means for associating both signals. And a video signal receiving apparatus.   The first video signal is a signal obtained by down-converting the original video signal, and the second video signal is a difference signal between the signal obtained by up-converting the first video signal and the original video signal. The video signal receiving apparatus according to claim 6.   The video signal receiving apparatus according to claim 6, wherein the control information is attribute information indicating whether each of the first and second video signals can be reproduced independently.   The video signal receiving apparatus according to claim 6, wherein the control information is reference information for indicating information to be referred to for each of the first and second video signals during reproduction.   The control information is PSI information multiplexed in the PMT information in the PSI information multiplexed with the first and second video signals, and the PSI information multiplexed in the first and second video signals, respectively. 7. The video signal receiving apparatus according to claim 6, wherein the video signal receiving apparatus is described in any one of the EIT information in the / SI information. The first and second video signals are input by the input means,
Based on control information added to the first and second video signals input to the input means by the control means for associating both signals, the first and second video signals A video signal receiving method for associating.

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