JP6375093B2 - STL / TTL line transmitter and STL / TTL line receiver - Google Patents

Description

  The present invention is a STL / (Studio Transmitter Link) / TTL (TTL) for transmitting a digital broadcast signal by a segment connection method such as multimedia broadcasting using the VHF-Low band from a performance station to a transmission station or from a transmission station to a transmission station. The present invention relates to an STL / TTL line transmission apparatus and an STL / TTL line reception apparatus that transmit in the form of a signal format of a broadcast transport stream (hereinafter referred to as “broadcast TS”) that is a transmission signal for a transmitter to transmitter link) line. .

  The signal format for transmission of broadcast TS for STL / TTL lines is as described in Chapter 5 of the appendix of ARIB standard ARIB STD-B31 (2.1 version) in digital terrestrial television broadcasting. For broadcast terrestrial multimedia broadcasting using a segmented transmission system and a signal format based on a broadcast TS, the broadcasting TS and 12 segments as described in Chapter 5 of the appendix of the ARIB standard ARIB STD-B46 (1.3 edition) A signal format based on a broadcast TS (hereinafter referred to as “concatenated / combined TS”) in which a format signal and a one-segment format signal are combined is known.

  As a conventional technique, a technique related to a transmission system for effectively using a broadcast TS by changing and replacing information in a dummy byte part of the broadcast TS with respect to a broadcast TS for an STL / TTL line is disclosed (for example, a patent). Reference 1). Further, a digital terrestrial television broadcast network system that transmits information using a null packet of a broadcast TS is disclosed (for example, see Patent Document 2).

JP 2010-252136 A JP 2011-15060 A

  In multimedia broadcasting based on the segment concatenation transmission method using the VHF-Low band, a signal obtained by concatenating a plurality of signals (maximum 14 segments) of 1 segment format or 3 segment format is modulated for STL / line or TTL line. To transmit.

  However, since the ARIB STD-B31 is specialized for digital terrestrial television broadcasting, it is a broadcast TS format (transmission speed 32.51 Mbps (= 512/63 × 4 Mbps)) with a fixed number of segments of 13 segments. Can only transmit.

  On the other hand, ARIB STD-B46 defines the signal format for multimedia broadcasting by the segment concatenated transmission method using the VHF-High band, and has been extended for segment concatenated transmission. This is a signal format of concatenated / combined TS considered for transmission of a total of 33 segments of signals of 7 and 7 one-segment signals. The transmission speed of the 13-segment broadcast TS is 32.51 Mbps (= 512/63 × 4 Mbps), and the transmission speed of the 1-segment broadcast TS is 2.03 Mbps (= 512/63/4 Mbps). Are combined to generate a concatenated / synthesized TS, the transmission speed of which is 79.24 Mbps (= 512/63 × (4 × 2 + 7/4) Mbps). In multimedia broadcasting by the segment concatenated transmission method using the VHF-High band, it is mainly intended to use satellite distribution instead of the STL / TTL line.

  Multimedia broadcasting by the segment concatenation transmission method using the VHF-Low band is configured in one segment format or three segment format, and it is considered that the number of each segment format is arbitrarily concatenated with the number of segments of 14 segments or less. Yes. The transmission speed of the one-segment broadcast TS is 2.03 Mbps (= 512/63/4 Mbps), and the transmission speed of the three-segment broadcast TS is 8.12 Mbps (= 512/63 Mbps). When broadcasting TSs are concatenated and combined as they are, if the 1-segment format is 14, the transmission speed of the concatenated / synthesized TS is 28.44 Mbps (= 512/63/4 × 14 Mbps), but the 3-segment format is 4 When a total of 14 segments and 1 segment format are configured, the transmission speed of the combined / combined TS is 36.57 Mbps (= 512/63 × 4 + 512/63/4 × 1 Mbps). Therefore, the transmission speed of the concatenated / combined TS combined and synthesized differs depending on the segment configuration, and exceeds the transmission speed of 32.51 Mbps in the digital terrestrial television broadcast, and the same STL / TTL line as the digital terrestrial television broadcast is used. It becomes difficult to transmit.

  On the other hand, in the technique of Patent Document 1, it is possible to effectively use the broadcast TS by changing and replacing the information in the dummy byte portion of the broadcast TS. However, the segment linked transmission method using the VHF-Low band is used. In multimedia broadcasting, no means is provided for solving the same problem of use for STL / TTL lines as in terrestrial digital television broadcasting due to the transmission rate of the concatenated / combined TS depending on the segment configuration.

  Further, in the technique of Patent Document 2, it is possible to effectively use the broadcast TS in terms of transmitting information using a null packet of the broadcast TS, but the segment connection broadcast TS is not considered, It does not provide means for solving the problem of use for STL / TTL lines similar to terrestrial digital television broadcasting due to the transmission rate of the concatenated / combined TS depending on the segment configuration.

  In the case of terrestrial digital television broadcasting and multimedia broadcasting using the VHF-High band, the broadcasting TS is defined in the appendix chapter 5 of ARIB STD-B31 and the appendix chapter 5 of ARIB STD-B46. As described above, it is specified that additional information (transmission control information) necessary for controlling the transmitting station is multiplexed during transmission of the broadcast TS. This additional information is multiplexed on the dummy byte of each TSP, the IIP (ISDB-T Information Packet) in the invalid layer TSP of the broadcast TS, etc. according to the information type in the additional information. For example, the transmission parameter is IIP, and information such as the TSP counter value is multiplexed on the dummy byte portion of each TSP. In ARIB STD-B46 (version 1.3 revised on December 18, 2012), the segment configuration control information (ie, the concatenated transmission control information) at the time of concatenated transmission is determined when the concatenated / combined TS is generated. It is specified that it is added by CIP (Connected transmission Information Packet) in the invalid layer TSP of the broadcast TS. However, the format of additional information multiplexed on the broadcast TS of the VHF-Low band multimedia broadcast is not defined at this stage.

  Therefore, it solves the problem of use for STL / TTL lines similar to terrestrial digital television broadcasting due to the transmission speed of the concatenated / combined TS depending on the segment configuration, and at the time of transmitting the broadcast TS for STL / TTL lines. For the predetermined additional information related to the broadcast TS, it is desirable for the receiving side to perform transmission with less delay.

  In order to satisfy these demands, a compressed broadcast TS is generated by deleting null packets included in a three-segment broadcast TS out of a VHF-Low-band multimedia broadcast TS composed of a maximum of 14 segments. Further, it is possible to adopt a mode in which the total transmission speed obtained by concatenating and synthesizing the broadcast TS and the compressed broadcast TS is set to be equal to or lower than the terrestrial digital broadcast TS (32.51 Mbps (= 512/63 × 4 Mbps)).

  In this case, after connecting and synthesizing the broadcast TS and the compressed broadcast TS, a null packet is added by rate adjustment to generate a concatenated / synthesized TS having the same transmission speed as the broadcast TS of the terrestrial digital broadcast, thereby enabling digital terrestrial television broadcasting. Can be used for the same STL / TTL line. However, there is a problem that the process of generating the concatenated / synthesized TS is complicated in two steps.

  For this reason, the problem of the use to the STL / TTL line similar to the terrestrial digital television broadcasting due to the transmission speed of the concatenated / combined TS being different depending on the segment configuration is solved, and the transmission TS for the STL / TTL line is transmitted. However, regarding the predetermined additional information related to the broadcast TS, there is a problem for the receiving side to make transmission with less delay and how to reduce the processing load required to generate the concatenated / combined TS.

  The present invention has been made in view of the above-described problems, and efficiently combines STL / synthesized combined / synthesized TS together with additional information by arbitrarily connecting and synthesizing a plurality of types of segment-type broadcast TSs with a predetermined number of segments or less. An object of the present invention is to provide an STL / TTL line transmitting apparatus and an STL / TTL line receiving apparatus that transmit via a TTL line.

  As described above, VHF-Low band multimedia broadcasting is considered to be composed of a maximum of 14 segments with a bandwidth of 6 MHz. In this broadcast, the number of segments of 14 segments or less is arbitrarily linked and broadcast. The transmission speed of the 1-segment broadcast TS is 2.03 Mbps (= 512/63/4 Mbps), and the transmission speed of the 3-segment broadcast TS is 8.12 Mbps (= 512/63 Mbps). When combined, the transmission rate of the combined / synthesized TS differs depending on the segment configuration (1-segment format or 3-segment format), and exceeds the transmission rate of 32.51 Mbps in terrestrial digital television broadcasting.

  Therefore, in the transmission apparatus for an STL / TTL line according to one aspect of the present invention, a digital broadcasting signal by a segment connection method such as multimedia broadcasting in the VHF-Low band is transmitted from a performance station to a transmission station (STL) in the form of a broadcast TS. When transmitting one or a plurality of VHF-Low-band multimedia broadcast broadcast TSs from the station to the transmitter (TTL), the 8-segment Mbps (512/63 Mbps) three-segment broadcast TS is compressed and converted. 6.10 Mbps (= 512/63/4 × 3 Mbps) broadcast TS, and the same STL / TTL line as terrestrial digital television broadcast, regardless of the segment configuration (1 segment format or 3 segment format) A concatenated / combined TS with a constant speed that can be used is generated and transmitted as a transmission signal.

  At this time, the transmission device for the STL / TTL line is “null” whose contents are all null at the same transmission speed (2.03 Mbps (= 128/63 Mbps)) as the broadcasting TS of the one-segment VHF-Low band multimedia broadcast. "Broadcast TS" is generated and concatenated and combined with one or more broadcast TS of VHF-Low band multimedia broadcast (32.51Mbps (= 512/63 x 4Mbps) ) And a flag for determining the distinction between the VHF-Low band multimedia broadcast broadcast TS (including the compressed broadcast TS) and the null broadcast TS is inserted into the additional information. On the reception side, the broadcast TS, the compressed broadcast TS, and the null broadcast TS are discriminated and demodulated by referring to the additional information.

In other words, the STL / TTL line transmitting apparatus according to the first aspect of the present invention uses a STL / TTL line to combine and combine TSs that are arbitrarily connected and combined within a predetermined number of segments for a plurality of types of segment-type broadcast TSs. A transmission device for an STL / TTL line to be transmitted, which monitors a TSP counter value of a first segment format broadcast TS among the plurality of types of segment format broadcast TSs, and in advance according to transmission parameters of the broadcast TS In deleting a null packet of a predetermined TSP counter value, data compression is performed on the broadcast TS by deleting the null packet based on a predetermined extraction TSP table in which the TSP amount to be shifted is minimized. Data compression / addition information that generates a compressed broadcast TS and multiplexes predetermined additional information after the data compression. Multiplexing means, a second segment format broadcast TS that is not subjected to the data compression among the plurality of types of segment format broadcast TS, the compressed broadcast TS, and a null broadcast TS are connected and combined and combined TS And a transmission means for performing transmission channel coding predetermined on the concatenated / combined TS and transmitting the result to the outside through an STL / TTL line.

Further, in the transmitter for STL / TTL circuits of the present invention, the first segment type is a three-segment format, the second segment form can be a 1 segment format.

Further, in the STL / TTL line transmitting apparatus of the present invention, the concatenating / combining means sets a flag for discriminating between the compressed broadcast TS and the null broadcast TS when generating the concatenated / combined TS. It has a means for inserting into the predetermined additional information.

  Further, in the STL / TTL line transmission apparatus of the present invention, the concatenating and combining means connects the null broadcast TS according to a transmission rate determined by a combination of the broadcast TS of the second segment format and the compressed broadcast TS. A TS combining means for generating a concatenated / combined TS matching the transmission rate of the STL / TTL line by adaptively determining the number is provided.

Furthermore, the STL / TTL line receiving apparatus according to the first aspect of the present invention has a predetermined number of segments or less for a plurality of types of segment-type broadcast TS transmitted from the STL / TTL line transmitting apparatus according to the first aspect of the present invention. A receiving device for an STL / TTL line that receives a combined / combined TS arbitrarily combined and combined at the STL / TTL line, on the transmission side, the first segment of the plurality of types of segment-type broadcast TSs The TSP counter value of the broadcast TS of the format is monitored, and when the null packet of the TSP counter value determined in advance according to the transmission parameter of the broadcast TS is deleted, a predetermined one that minimizes the amount of TSP to be shifted is selected. a compression broadcast TS data compression is performed by removing null packets based on the extracted TSP table, the plurality of types of segments The second segment format broadcast TS that is not subjected to data compression and the null broadcast TS are combined and combined into a plurality of types of segment format broadcast TS. The TSP counter value of the compressed broadcast TS is monitored, and when the TSP counter value is a continuous value, the TSP is connected in the order in which the compressed broadcast TS is separated, and the TSP counter value is a continuous value. Data decompression means for restoring a broadcast TS by inserting a null packet until the TSP counter value reaches a continuous value when there is not.

In the receiving apparatus for STL / TTL circuits of the present invention, the first segment type is a three-segment format, the second segment form can be a 1 segment format.

Also, in the STL / TTL line receiver of the present invention, the separation means has means for referring to the predetermined additional information to determine and separate the distinction between the compressed broadcast TS and the null broadcast TS. It is characterized by that.

  Further, in the STL / TTL line receiver of the present invention, the separating means includes means for deleting null packets inserted so as to have a constant transmission rate that can be transmitted on the STL / TTL line on the transmitting side. It is characterized by providing.

  According to the present invention, in a transmission signal arbitrarily connected and synthesized with a predetermined number of segments or less for a plurality of types of segment-type broadcast TS, for example, in a multimedia broadcast transmission signal connected with 14 or less segments, Regardless of (1 segment format or 3 segment format), a concatenated / combined TS can be configured at a predetermined transmission rate (for example, 32.51 Mbps (= 512/63 × 4 Mbps)) or less, so that digital terrestrial television broadcasting The same STL / TTL line can be used. Furthermore, it is possible to reduce the processing load required for adjusting the transmission speed of the concatenated / combined TS to the same transmission speed as that of the broadcast TS of terrestrial digital broadcasting.

It is a block diagram which shows the structure of the transmission system provided with the transmission apparatus for STL / TTL lines of Example 1 by this invention. It is a figure which shows an example of the kind of additional information which concerns on the transmission apparatus for STL / TTL lines of Example 1 by this invention, and its classification example. It is a block diagram which shows the structure of the data compression and additional information multiplexing part in the transmission apparatus for STL / TTL lines of Example 1 by this invention. It is a figure which shows the multiplexing position of the additional information contained in the dummy byte part of each TSP which concerns on the transmission apparatus for STL / TTL lines of Example 1 by this invention. It is a block diagram which shows the structure of the connection synthetic | combination part in the transmission apparatus for STL / TTL lines of Example 1 by this invention. It is a figure which shows the time multiplexing example of connection and synthetic | combination TS in the transmission apparatus for STL / TTL lines of Example 1 by this invention. It is a figure which shows an example of the bit allocation of the connection and synthetic | combination TS distinction information, segment format information, and unit transmission wave information in the transmission apparatus for STL / TTL lines of Example 1 by this invention. It is a table | surface which shows the number of TSP contained in 1 multiplex frame which concerns on the transmission apparatus for STL / TTL lines of Example 1 by this invention. In the case of mode 1, guard interval 1/4, layer A QPSK (coding rate 2/3), layer B 16QAM (coding rate 1/2) according to the transmission device for the STL / TTL line according to the first embodiment of the present invention It is a figure which shows arrangement | positioning of broadcast TS packet. Extraction TSP in Mode 1, Guard Interval 1/4, A Layer QPSK (Coding Rate 2/3), and B Layer 16 QAM (Coding Rate 1/2) in the STL / TTL Line Transmitting Device of Embodiment 1 of the present invention It is a table | surface which shows a table. It is explanatory drawing of the example of the production method example of the extraction TSP table according to the transmission parameter in the transmitter for STL / TTL lines of Example 1 by this invention. It is a block diagram which shows the structure of the receiver for STL / TTL lines of Example 1 by this invention. It is a block diagram which shows the structure of the data expansion | extension part in the receiver for STL / TTL lines of Example 1 by this invention. It is a block diagram which shows the structure of the transmission system provided with the transmission apparatus for STL / TTL lines of Example 2 by this invention. It is a block diagram which shows the structure of the connection synthetic | combination part in the transmission apparatus for STL / TTL lines of Example 2 by this invention. It is a block diagram which shows the structure of the receiver for STL / TTL lines of Example 2 by this invention. It is a figure which shows the example of the number of null broadcast TS by the combination of the connection composition which concerns on this invention. It is a block diagram which shows the structure of the data compression and additional information multiplexing part in the transmission apparatus for STL / TTL lines of Example 3 by this invention.

  Hereinafter, the STL / TTL line transmitting apparatus and the STL / TTL line receiving apparatus according to the first embodiment of the present invention will be described with reference to the drawings.

[Example 1]
(STL / TTL line transmitter)
FIG. 1 is a block diagram illustrating a configuration of a transmission system including an STL / TTL line transmission apparatus 1 according to a first embodiment of the present invention. In the present embodiment, the total transmission speed of the broadcast TS is the largest, that is, VHF- composed of four three-segment broadcast TSs and two one-segment broadcast TSs (total of 14 segments). An example of an apparatus for transmitting a composite TS of Low-band multimedia broadcasting using an STL / TTL 1 line of terrestrial digital broadcasting will be described.

  Referring to FIG. 1, the transmission system according to the present embodiment includes predetermined additional information (FIG. 1) for a transmission device 1 for an STL / TTL line and a TS in a three-segment format (hereinafter also referred to as “3 segment”). 2), 3seg TS re-multiplexing devices 6-1, 6-2, 6-3, and 6 that multiplex the first additional information A classified from 3) to form a three-segment broadcast TS. -4 and 1 segment format (hereinafter also referred to as “1seg”) TS, the information belonging to the first additional information A and the second additional information B among the predetermined additional information is multiplexed into one segment format 1seg TS remultiplexing devices 7-1 and 7-2 that form a broadcasting TS of the first segment, and first additional information A and second additional information B that are classified from the predetermined additional information according to the TS of each segment format And third additional information C, and first addition And an additional information insertion control unit 8 which outputs information pertaining to the broadcast A and the second additional information B.

  The additional information insertion control device 8 includes a segment format determination unit 81 and an additional information insertion control unit 82. The segment format determination unit 81 determines whether the TS for the STL / TTL line to be transmitted is a 1-segment format signal or a 1-segment format signal, and sends the determination result to the additional information insertion control unit 82 To do. The additional information insertion control unit 82 outputs the first additional information A and the second additional information B classified from predetermined additional information with respect to the signal of the three segment format based on the determination result, and outputs the one segment format. Of the predetermined additional information, information belonging to the first additional information A and the second additional information B is output, and a concatenated / synthesized TS is generated for the three-segment signal and the one-segment signal. The third additional information C to be multiplexed in common at times is output.

  Additional information for signals in the 1 segment format output from the additional information insertion control device 8 (information belonging to the first additional information A and the second additional information B) is sent to the 1-segment TS remultiplexers 7-1 and 7-2. Entered. Further, the first additional information A and the second additional information B for signals in the three-segment format output by the additional information insertion control device 8 are the TSP scheduled to be deleted when data is compressed, the IIP, the AC data, and the carrier-specific data. In order to prevent this from happening, the first additional information A is multiplexed by the 3seg TS remultiplexer 6-1, 6-2, 6-3, 6-4 before data compression, and the second additional information A Information B is output at a different timing so as to be multiplexed after data compression by the STL / TTL line transmission apparatus 1. The first additional information A, second additional information B, and third additional information C to be classified will be described in detail later with reference to FIG.

  The 3seg TS remultiplexers 6-1, 6-2, 6-3, and 6-4 are devices that perform TS remultiplex processing for each unit transmission wave. A TS re-multiplexing unit 61 that multiplexes the first additional information A classified from the information to form and output a three-segment broadcast TS is provided. In the present specification, each of the 3seg TS remultiplexing apparatuses 6-1, 6-2, 6-3, and 6-4 will be collectively referred to as “3seg TS remultiplexing apparatus 6”.

  The 1seg TS remultiplexing devices 7-1 and 7-2 are devices for performing TS remultiplexing processing for each unit transmission wave in the same way as the 3seg TS remultiplexing device 6, but each adds one segment format signal. A TS remultiplexing unit 71 is provided that multiplexes information (information belonging to the first additional information A and the second additional information B) to form and output a broadcast TS of one segment format. In the present specification, each of the 1seg TS remultiplexing apparatuses 7-1 and 7-2 will be collectively referred to as "1seg TS remultiplexing apparatus 7".

  The TS remultiplexing units 61 and 71 in the 3seg TS remultiplexing device 6 and the 1seg TS remultiplexing device 7 perform TS remultiplexing processing for each unit transmission wave by using the additional information classified for each. The information indicating that the broadcast TS is a broadcast TS is added to the dummy byte of each broadcast TS.

  The STL / TTL line transmitter 1 transmits a digital broadcasting signal by a segment connection method such as multimedia broadcasting in the VHF-Low band in the form of a broadcast TS from a performance station to a transmission station (STL) and from a transmission station to a transmission station (TTL). Is a device for generating and transmitting a total of 14 segments of concatenated / synthesized TS by multiplex concatenation of a predetermined number of three-segment broadcast TSs and a predetermined number of one-segment broadcast TSs. Data compression / additional information multiplexing units 9-1, 9-2, 9-3, and 9-4 provided for each three-segment broadcasting TS output from the 3seg TS remultiplexing device 6 In the document, they are collectively referred to as “data compression / additional information multiplexing unit 9”) and a broadcast TS after compression sent from each data compression / additional information multiplexing unit 9 (hereinafter referred to as “compression”). And a combining / synthesizing unit 3 that generates a concatenated / combined TS obtained by concatenating and synthesizing each one-segment broadcast TS output from the 1-segment TS remultiplexing device 7, and for STL / TTL. A transmission path encoder 4 and an RF (Radio Frequency) transmitter 5 are provided.

  As shown in FIG. 1, first, four 3-segment broadcast TSs and two 1-segment broadcast TSs are input to the STL / TTL line transmission apparatus 1. A three-segment broadcast TS has a transmission rate of 8.12 Mbps (= 512/63 Mbps), and a one-segment broadcast TS has a transmission rate of 2.03 Mbps (= 512/63/4 Mbps).

  The data compression / additional information multiplexing unit 9 performs data compression on a broadcast TS of 8.12 Mbps (= 512/63 Mbps) to a compressed broadcast TS of 6.10 Mbps (= 512/63/4 × 3 Mbps), and further data compression In order to prevent the case where the TSP scheduled to be deleted sometimes becomes IIP, AC data, and carrier-specific data, the second additional information B is multiplexed after data compression and output to the concatenation unit 3 as a compressed broadcast TS. .

  The concatenating / combining unit 3 receives the third additional information C and the four 3-segment format compressed broadcast TS output from the data compression / additional information multiplexing unit 9 and is output from the 1-segment TS remultiplexing device 7. The two 1-segment broadcast TSs are directly input, the four 3-segment compressed broadcast TSs, the two 1-segment broadcast TSs, and the two generated within the concatenating and combining unit 3 By synthesizing a null packet from a null broadcast TS (details will be described later), one concatenated / combined TS having a constant transmission rate is generated and output to the STL / TTL transmission line encoding unit 4. . In the case of the present embodiment, the total transmission rate of the broadcast TS and the compressed broadcast TS is 28.44 Mbps (= 512/63/4 × (3 × 4 + 2) Mbps), and the number of the null broadcast TS corresponding to the transmission rate. Is multiplexed by the number corresponding to the transmission rate ratio, and one concatenated / combined TS having a constant transmission rate of 32.51 Mbps (= 512/63 × 4 Mbps) is output from the concatenating unit 3.

  The STL / TTL transmission path encoding unit 4 performs predetermined transmission path encoding (for example, similar to ARIB STD-B31) on the concatenated / combined TS to generate an IF (Intermediate Frequency) signal, and performs RF transmission. Send to part 5.

  The RF transmission unit 5 converts the IF signal of the concatenated / combined TS subjected to transmission path coding into an RF signal having a predetermined frequency, generates a broadcast wave, and sends it out.

  FIG. 2 shows an example of the types of transmission control information (additional information) to be multiplexed on the broadcast TS signal and its classification example with respect to the predetermined additional information used in this embodiment. In the present embodiment, information that is not changed in the frame such as TMCC identification and TSP position and synchronization related information in the frame such as TSP counter value are classified as the first additional information A, while AC Information that is changed as needed, such as data and operator-specific data, and information transmitted by IIP are classified as second additional information B. Furthermore, segment configuration control information (that is, concatenated transmission control information) and segment format information / unit transmission wave information that are multiplexed when the concatenated / combined TS is generated include third additional information as information related to concatenated transmission. Classified as C. However, the hierarchical information for each TSP belongs to the first additional information A and the second additional information B, but is rewritten when the second additional information B is multiplexed after the first additional information A is multiplexed. The broadcast TS / concatenated / combined TS distinction information belongs to the first additional information A, the second additional information B, and the third additional information C. The second additional information B after the first additional information A is multiplexed. Is rewritten when the third additional information C is multiplexed when the concatenated / synthesized TS is generated. However, the type of the predetermined additional information according to the present embodiment is not limited to the type illustrated in FIG.

  FIG. 3 is a block diagram showing the configuration of the data compression / additional information multiplexing unit 9 in the STL / TTL line transmission apparatus 1 of the present embodiment. The data compression / additional information multiplexing unit 9 includes a TSP buffer 91, a TSP counter value extraction unit 92, an extraction TSP table selection control unit 93, an extraction TSP table storage unit 93a, a TSP extraction unit 94, and an additional information multiplexing unit. 95. A three-segment broadcast TS in which the first additional information A is multiplexed is input to the TSP buffer 91 and the TSP counter value extracting unit 92, and the second additional information B output from the additional information insertion control device 8 is extracted TSP table selection. The data is input to the control unit 93 and the additional information multiplexing unit 95.

  The TSP buffer 91 has a function of temporarily storing broadcast TS packets (hereinafter referred to as “TSP”) in the input three-segment broadcast TS, and a predetermined TSP counter value is controlled by a TSP extraction unit 94 described later. Is read.

  The TSP counter value extraction unit 92 extracts the TSP counter value in the first additional information A included in the dummy byte portion of each TSP shown in FIG. 4 and sends it to the TSP extraction unit 94.

  The extracted TSP table selection control unit 93 inputs the transmission parameters included in the TMCC in the second additional information B output from the additional information insertion control device 8, and stores a plurality of extracted TSP tables corresponding to the transmission parameters in advance. The extracted TSP table that matches the transmission parameter extracted by the extracted TSP table selection control unit 93 is selected from the extracted TSP table storage unit 93 a, read out, and output to the TSP extraction unit 94. Here, the extracted TSP table is a table showing TSP counter values of TSPs extracted as compressed broadcast TSs among the TSPs constituting the three-segment format broadcast TS, and the creation method thereof will be described in detail later.

  The TSP extraction unit 94 receives the TSP counter value output from the TSP counter value extraction unit 92 and refers to the extraction TSP table output from the extraction TSP table selection control unit 93, and the compressed broadcast TS from the TSP buffer 91. And the corresponding TSP is extracted and sent to the additional information multiplexing unit 95.

  The additional information multiplexing unit 95 receives the TSP extracted by the TSP extraction unit 94 each time information (AC data, data transmitted by IIP, business-specific data, etc.) included in the second additional information B is input. The second additional information B is multiplexed into a null packet (Null_TSP). At this time, the hierarchical information for each TSP multiplexed with the first additional information A is rewritten. As a result, the broadcast TS of 8.12 Mbps (= 512/63 Mbps) is multiplexed with the additional information including the information of the first additional information A and the second additional information B. 6.10 Mbps (= 512/63/4 × 3 Mbps) ) Of the compressed broadcast TS.

  FIG. 5 is a block diagram showing the configuration of the concatenating unit 3 in the STL / TTL line transmission apparatus 1 of the present embodiment. The concatenation synthesis unit 3 includes an additional information addition unit 31-1, 31-2, 31-3, 31-4, 32-1, 32-2, a TS synthesis unit 33, and a null broadcast TS generation unit 34 (this embodiment). The example includes two first null broadcast TS generation units 34-1 and second null broadcast TS generation unit 34-2).

  The additional information adding units 31-1, 31-2, 31-3, 31-4 are three segments respectively output from the data compression / additional information multiplexing units 9-1, 9-2, 9-3, 9-4. The compressed broadcast TS of the format is input, and the concatenated / combined TS discrimination information, the segment format information and the unit transmission wave information included in the third additional information C are multiplexed on the dummy bytes of the compressed broadcast TS and output to the TS combining unit 33. .

  The additional information adding units 32-1 and 32-2 receive the 1-segment broadcasting TSs output from the 1seg TS remultiplexers 7-1 and 7-2, respectively, and the concatenation included in the third additional information C The combined TS distinction information, segment format information, and unit transmission wave information are multiplexed on the dummy bytes of the broadcast TS and output to the TS combining unit 33.

  The null broadcast TS generation unit 34 (first null broadcast TS generation unit 34-1 and second null broadcast TS generation unit 34-2) is the same as the one-segment broadcast TS in the null broadcast TS generation unit 5 ( A broadcast TS in which all information portions are null packets at 2.03 Mbps (= 128/63 Mbps) is generated as a null broadcast TS and output to the TS synthesis unit 33. The null broadcast TS generated by the null broadcast TS generation unit 34 subtracts the combined rate of the compressed broadcast TS and broadcast TS to be combined / synthesized from the transmission rate of the combined / synthesized TS (32.51 Mbps (= 512/63 × 4 Mbps)). Only the value divided by the transmission speed of the null broadcast TS is generated.

  In the case of the first embodiment, since there are four compressed broadcast TSs and two broadcast TSs, the combined speed of the compressed broadcast TS and the broadcast TS to be combined and combined is 28.44 Mbps (= 128/63 × 3 × 4 + 128/63 × 2). Therefore, the number of null broadcast TS is (512/63 × 4-128 / 63 × 3 × 4-128 / 63 × 2) / (128/63) = 2. Further, the null broadcast TS generation unit 5 adds a flag to determine the null broadcast TS when demodulating by the receiving device. For example, in the bit allocation example of the concatenated / combined TS discriminating information, segment format information, and unit transmission wave information shown in FIG. 2, as shown in FIG. A flag indicating “null broadcast TSP” may be added to one of the taxes.

  The TS composition unit 33 includes a compressed broadcast TS obtained from the additional information addition units 31-1, 31-2, 31-3, and 31-4, and a broadcast TS obtained from the additional information addition units 32-1 and 32-2. The null broadcast TS is time-division multiplexed together with the CIP in accordance with the transmission speed and synthesized to generate a concatenated / synthesized TS.

  In this way, by generating the null broadcast TS in advance, a null for achieving a constant transmission rate that can be transmitted through the STL / TTL line when the three-segment compressed broadcast TS and the one-segment broadcast TS are connected. No need for rate adjustment by packet insertion. In addition, by setting the null broadcast TS to the same transmission speed as the one-segment broadcast TS, the number of null broadcast TSs is an integer regardless of the combination of any broadcast TS (see FIG. 17). (It will be described later.) FIG. 6 shows an example of the time multiplexing order of the concatenated / combined TS generated by the TS combining unit 33. 1 TS packet transfer time (approximately 0.8 ms = 204 x 8 / (128 x 63 x 1e-6) x 1e3) of a one-segment broadcast TS with a low transmission rate is set as a unit time, and the unit time is linked All the compressed broadcast TSs, broadcast TSs, and null broadcast TSs to be combined are multiplexed by the number corresponding to the transmission rate ratio. The compressed broadcast TS multiplexes 3 packets within 1 unit time, and the 1 segment format broadcast TS and the null broadcast TS multiplex 1 packet within 1 unit time. The multiplexed packet is transferred at the transmission rate of the concatenated / combined TS in the next unit time.

  In the description related to the concatenating and synthesizing unit 3 shown in FIG. 5, the concatenated / combined TS distinguishing information included in the third additional information C is included in the dummy bytes of the compressed broadcasting TS in the three-segment format and the broadcasting TS in the one-segment format. Although the format information and the unit transmission wave information are multiplexed on the dummy bytes of the broadcast TS and then the three-segment compressed broadcast TS and the one-segment broadcast TS are combined, the three-segment compressed broadcast TS has been described. 3 segment format compressed broadcast TS and 1 segment format broadcast TS dummy bytes, and concatenated / synthesized TS distinction information included in the third additional information C, segment format information and unit You may comprise so that transmission wave information may be multiplexed.

  Further, regarding the bit allocation of the concatenated / combined TS discriminating information, the segment format information, and the unit transmission wave information, as illustrated in FIG. 7, the concatenated / combined TS discriminating information (the fifth bit to the fifth bit) included in the third additional information C is exemplified. 7 bit), segment format information (4th bit), and unit transmission wave information (0th bit to 3rd bit). In the concatenated / combined TS discrimination information, “null broadcast TSP” and “compressed broadcast” A flag indicating “TSP” can be added.

(Example of method for creating extraction TSP table according to transmission parameter)
Next, a method for creating an extracted TSP table according to transmission parameters stored in advance in the extracted TSP table storage unit 93a will be described. The 3-segment VHF-Low band multimedia broadcast is scheduled to be composed of two layers (A layer and B layer) of one segment and two segments. For this reason, the broadcast TS has a multi-frame structure in which the ASP of the A layer, the TSP of the B layer, and a null packet are connected. The null packet is inserted in order to interface the TSP with a constant clock regardless of the transmission parameter. The number of TSPs included in a multiplex frame differs depending on the mode and guard interval ratio, and the arrangement of TSPs and null packets in each layer in the multiplex frame depends on transmission parameters (mode, guard interval ratio, modulation scheme in each layer, coding rate). Different. In other words, the arrangement of TSPs and null packets in each layer in a multiplexed frame is uniquely determined by the transmission parameters (mode, guard interval ratio, modulation scheme of each layer, and coding rate) regardless of the content to be transmitted.

  8 shows the number of TSPs included in one multiplexed frame, FIG. 9 shows mode 1, guard interval 1/4, A layer QPSK (coding rate 2/3), and B layer 16 QAM (coding rate 1/2). The broadcast TS packet arrangement in the case of is shown. In order to compress data from a broadcast TS to a compressed broadcast TS, null packets that are a quarter of the number of broadcast TS packets included in one multiplexed frame may be deleted. In order to reduce the delay, it is desirable to disperse the broadcast TS packets to be deleted at equal intervals. However, since the A layer and the B layer are not inserted at equal intervals, in this embodiment, as the compressed broadcast TS, An extracted TSP table indicating the TSP counter value of the TSP to be extracted (ie, the TSP counter value of the TSP not deleted in the broadcast TS) is created and stored in the extracted TSP table storage unit 93a.

  First, as a TSP to be deleted, in view of shortening the delay amount, a TSP counter value is deleted based on a TSP having any of 4n, 4n + 1, 4n + 2, 4n + 3 (n: positive integer). The target TSP may be considered. By checking the TSP type of the TSP counter value to be deleted for each of these four deletion criterion TSP counter values, the minimum deletion amount among the four deletion criteria is determined in advance. be able to. For example, when a TSP with a TSP counter value of 4n is used as a reference TSP to be deleted, the broadcast TS packet to be deleted is not a null packet, but is a TSP counter value that is a TSP of the A layer / B layer. The TSP of the TSP counter value is deleted. If the subsequent TSP is also in the A layer or the B layer, the TSP of the next TSP counter value is further deleted. In this way, only the null packet can be deleted by shifting the TSP counter value. However, the maximum value of the TSP amount to be shifted becomes the size of the TS buffer and becomes the delay amount as it is. Therefore, it is possible to grasp the delay amount when the TSP having the TSP counter value of 4n is set as the TSP to be deleted. Similarly, it is possible to grasp the respective delay amounts when the TSP having the TSP counter values 4n + 1, 4n + 2, and 4n + 3 is set as the TSP to be deleted. Therefore, an extraction TSP table having a minimum delay amount can be created by selecting in advance one of the four deletion criteria that minimizes the amount of TSP to be shifted.

  Specifically, the broadcast TS arrangement in FIG. 9 (mode 1, guard interval 1/4, layer A QPSK (coding rate 2/3), layer B 16QAM (coding rate 1/2)) will be described as an example. First, let us consider a case where it is assumed that the TSP counter value to be deleted is deleted based on the TSP corresponding to 4n + 1. From FIG. 9, the TSP type with a TSP counter value of 1 (n = 0) is a null packet and can be deleted. On the other hand, since the TSP type with a TSP counter value of 17 (n = 4) is a TSP of the B layer, if the next TSP counter value is checked without deleting it, the TSP type with the TSP counter value of 18 becomes a null packet. Is deleted. At this time, the shift amount is one packet.

  Further, since the TSP type with a TSP counter value of 37 (n = 9) is the TSP of the A layer, when the next TSP is examined, it becomes the TSP of the B layer. Therefore, the TSP counter value of the TSP to be deleted is 39, and the shift amount is 2 packets. As a result of the confirmation, assuming that the TSP counter value to be deleted is 4n + 1, the maximum shift amount is 2 packets. The TS buffer amount may be set to 2 packets. Even if the TSP counter value to be deleted is 4n, 4n + 2, the maximum shift amount is 2 packets. On the other hand, assuming that the TSP counter value to be deleted is 4n + 3, the maximum shift amount is one packet. Therefore, if the TSP counter value to be deleted from this transmission parameter is based on 4n + 3, the delay amount can be shortened. An example of the extracted TSP table created by the above procedure is shown in FIG. As described above, even if four deletion criteria are assumed, if the maximum shift amount is the same, any of them may be selected. For example, it is preferable to select one having a small number of shifts.

  In the above manner, the extracted TSP table is converted into transmission parameters, that is, 3 (mode) × 4 (guard interval ratio) × 3 (A layer modulation scheme / inner code) × 3 (B layer modulation scheme / inner code) = 108 tables can be created.

(Another example of how to create an extraction TSP table according to transmission parameters)
In the above-described method of creating the extracted TSP table, the extracted TSP table is set for each transmission parameter, and thus 108 tables are required. As another example, an example will be described in which an extracted TSP table is used in which the number of extracted TSP tables is reduced to 12 (only a combination of mode and guard interval ratio) while minimizing an increase in delay time.

  Specifically, a method for creating an extracted TSP table according to transmission parameters stored in advance in the extracted TSP table storage unit 93a will be described. As shown in FIG. 11, in view of shortening the delay amount, the TSP counter value has one of four types of 4n, 4n + 1, 4n + 2, 4n + 3 (n: positive integer) as a TSP to be deleted. It can be considered that the TSP to be deleted is based on the TSP. By checking the TSP type of the TSP counter value to be deleted for each of these four deletion criterion TSP counter values, the minimum deletion amount among the four deletion criteria is determined in advance. be able to.

  At this time, there are nine transmission parameters having the same mode / guard interval ratio combination, because there are three combinations of modulation schemes and inner codes in the A / B layer. Therefore, nine types of TSP having the same TSP counter value are checked. If at least one TSP of the A layer / B layer exists in the TSP of the TSP counter value to be deleted, the TSP of the next TSP counter value is deleted (example: TSP counter value in FIG. 9). = 5). Further, if there is a TSP of the A layer or the B layer for the subsequent TSP, the TSP of the next TSP counter value is further set, and this is repeated. For example, when the TSP counter value = 20 in FIG. 9, the null packet with the TSP counter value = 23 shifted by 3 packets is deleted.

  By shifting the TSP counter value in this way, only null packets can be deleted. However, the maximum value of the TSP amount to be shifted becomes the size of the TS buffer and becomes the delay amount as it is. For this reason, the TSP counter value to be shifted is selected from the four TSP counter values. In the case of mode 3 and guard interval 1/8, the delay amount is 4 packets for 4n, 4n + 1, and 4n + 2, whereas if the extracted TSP table is created based on 4n + 3, the delay amount is 2 packets. can do.

  In the above manner, the number of extracted TSP tables can be reduced and the delay amount can be reduced.

  In addition, when transmitting in the same way as terrestrial digital television broadcasting and multimedia broadcasting using the VHF-High band, the broadcast TS includes transmission parameters such as A layer TSP, B layer TSP, and null packet. There is an invalid hierarchical TSP that multiplexes IIP, TM data, and carrier-specific data indicating TMCC information. The multiple positions of these data are not defined by the standard. In the present embodiment, the first additional information A, the second additional information B, and the third additional information are added according to the contents of the additional information so that the TSP scheduled to be deleted may not be the IIP, AC data, and carrier-specific data. By classifying the information into the information C and changing the multiplexing timing of the first additional information A, the second additional information B, and the third additional information C, it is possible to reduce the processing delay when the broadcast TS is compressed / expanded.

  As described above, the STL / TTL line transmitting apparatus 1 according to the present embodiment uses a combined TS that is arbitrarily combined and combined with a plurality of types of segment-type broadcast TSs with a predetermined number of segments or less as STL / TTL lines. The TSP counter value of a broadcast TS of a predetermined segment format among the plurality of types of segment format broadcast TSs is monitored, and the TSP counter value determined in advance according to the transmission parameter of the broadcast TS is null. While performing data compression on the broadcast TS by deleting the packet, multiplexing is performed while changing the timing of the first additional information A, the second additional information B, and the third additional information C classified according to the content of the additional information. A compressed broadcast TS is generated, and the compressed broadcast TS, a broadcast TS that is not subjected to data compression among the plurality of types of segment-type broadcast TS, and this Is inserted in accordance with the transmission speed of connecting the null broadcast TS, generates a connection-synthesis TS. As a result, a concatenated / combined TS can be configured at a predetermined transmission rate (for example, 32.51 Mbps (= 512/63 × 4 Mbps)) or less, and therefore, an STL / TTL line similar to that for terrestrial digital television broadcasting is used. In addition, since the delay of the additional information when the compressed broadcast TS is expanded can be minimized, it is possible to efficiently transmit the broadcast TS and the additional information.

(Receiver for STL / TTL line)
FIG. 12 is a block diagram showing the configuration of the STL / TTL line receiver 10 according to the first embodiment of the present invention. The STL / TTL line receiver 10 of the present embodiment includes an RF receiver 11, an STL / TTL transmission path decoder 12, and a compressed broadcast TS of each three-segment format combined with a concatenated / combined TS. A separation unit 13 for separating each one-segment broadcast TS and a data decompression unit 14 provided for each three-segment compressed broadcast TS are provided.

  The RF receiving unit 11 receives the broadcast wave of the RF signal of the concatenated / combined TS transmitted from the STL / TTL line transmitting device 1, converts it into an IF signal, and outputs it to the STL / TTL transmission line decoding unit 12. .

  The STL / TTL transmission path decoding unit 12 performs predetermined transmission path decoding (for example, similar to ARIB STD-B31) on the transmission line encoded signal of the concatenated / synthesized TS converted into the IF signal, and demodulates and decodes The connected and synthesized TS is output to the separation unit 13.

  The separation unit 13 separates the compressed broadcast TS, the broadcast TS, and the null broadcast TS in the multiplexed order. More specifically, the separation unit 13 first deletes the null packet added by the concatenation combining unit 3 in the STL / TTL line transmission apparatus 1. For example, when one null packet is added per 7 TSPs counted from the head of the multiplexed frame in the concatenating / combining unit 3 in the STL / TTL line transmitter 1, the separating unit 13 also starts the head of the multiplexed frame. After detecting this, one null packet may be deleted for every eight TSPs. Note that it is certain that the null broadcast TS is separated using the discrimination flag.

  Subsequently, the separation unit 13 deletes the null packet, and then separates the three 3-segment format compressed broadcast TS and the two 1-segment format broadcast TS into the separated four 3-segment format compressed broadcasts. Each TS is output to the respective data decompression unit 14, and the separated two one-segment broadcast TSs are output to the outside.

  The data decompression unit 14 inserts a null packet according to the TSP counter value, decompresses the compressed broadcast TS, and outputs it as a three-segment type broadcast TS.

  FIG. 13 is a block diagram showing the configuration of the data decompression unit 14 in the STL / TTL line receiver 10 of this embodiment. The data decompression unit 14 includes a TSP buffer 15, a TSP counter value extraction unit 16, a null packet generation unit 17, and a null packet insertion unit 18. The three-segment compressed broadcast TS is input to the TSP buffer 15 and the TSP counter value extraction unit 16, respectively.

  The TSP buffer 15 has a function of temporarily storing the TSP in the inputted compressed broadcast TS of the three segment format, and the TSP is read according to the TSP counter value under the control of the null packet insertion unit 18 described later.

  The TSP counter value extraction unit 16 extracts the TSP counter value in the first additional information A and sends it to the null packet insertion unit 18.

  The null packet generation unit 17 generates a null packet in response to a null packet insertion request from the null packet insertion unit 18 and outputs the null packet to the null packet insertion unit 18.

  The null packet insertion unit 18 reads the TSP in order from the TSP buffer 15 when the TSP counter value is a continuous value, and the TSP counter value is a continuous value when the TSP counter value is not a continuous value and there is an omission. The necessary amount of null packets is inserted from the null packet generator 17 until the broadcast TS is restored. In this embodiment, since the second additional information B and the third additional information C are multiplexed after compressing the broadcast TS in the 3-segment format, the broadcast TS can be restored without changing the position of the additional information. There is no need to hold the extracted TSP table used on the transmission side.

  Thereby, the compressed broadcast TS of 6.10 Mbps (= 512/63/4 × 3 Mbps) is converted into the broadcast TS of 8.12 Mbps (= 512/63 Mbps).

  In this way, the STL / TTL line receiving apparatus 10 of the present embodiment uses the combined / combined TS arbitrarily combined and combined with a predetermined number of segments or less for a plurality of types of segment-type broadcast TSs into the STL / TTL line. When receiving the data, the concatenated / combined TS including the compressed broadcast TS is separated, the TSP counter value of the compressed broadcast TS is monitored, and a null packet of a predetermined TSP counter value is inserted to thereby compress the compressed broadcast TS. Data expansion is performed on the TS to restore the original broadcast TS.

  With the above configuration, VHF-Low-band multimedia broadcasting concatenated / combined TS composed of four 3-segment broadcasting TSs and two 1-segment broadcasting TSs is STL / TTL for terrestrial digital television broadcasting. Can be transmitted over one line.

[Example 2]
(STL / TTL line transmitter)
FIG. 14 is a block diagram illustrating a configuration of a transmission system including the STL / TTL line transmission apparatus 1 according to the second embodiment of the present invention. In FIG. 14, the same components as those in FIG. 1 are denoted by the same reference numerals. In this embodiment, when the number of segments to be concatenated / combined is small and the total transmission speed of the three-segment broadcast TS and the one-segment broadcast TS is smaller than the transmission speed of the concatenated / combined TS, the VHF-Low band multi An example of an apparatus for transmitting a composite TS of media broadcasting through an STL / TTL 1 line of terrestrial digital broadcasting will be described.

  In the case of the present embodiment, it is possible to connect and synthesize a 3-segment broadcast TS without compression. As shown in FIG. 14, in the second embodiment, a concatenated / combined TS in the case of two three-segment broadcast TSs and three one-segment broadcast TSs is transmitted by one STL / TTL line transmitter 1. An example is shown. The STL / TTL line transmitting apparatus 1 of the second embodiment uses the data compression / additional information multiplexing unit 9 in FIG. 1 to transmit predetermined additional information (second additional information B) without compressing the three-segment broadcast TS. The configuration is replaced with multiplexed additional information multiplexing units 9a-1 and 9a-2 (collectively referred to as “data compression / additional information multiplexing unit 9a” in the present specification).

  FIG. 15 is a configuration example of the connection synthesis unit 3 according to the second embodiment. In FIG. 15, the same components as those in FIG. The concatenation synthesis unit 3 includes additional information addition units 31-1, 31-2, 32-1, 32-2, and 32-3, null broadcast TS generation units 34-1 to 34-5, and a TS synthesis unit. 33. Each functional unit operates in the same manner as in the first embodiment. In the second embodiment, by generating five null broadcast TSs and performing TS combining, the same transmission speed as the concatenated / combined TS shown in the first embodiment is obtained. Therefore, the concatenating unit 3 connects the number of null broadcast TSs determined according to the total transmission rate when the three-segment broadcast TS and the one-segment broadcast TS are concatenated (this concatenation number is 0). According to the above, each broadcast TS is connected and combined so that the total transmission speed of the concatenated / combined TS is less than or equal to the transmission speed of the STL / TTL line. can do.

  In addition, although Example 2 provided the additional information multiplexing part 9a which multiplexes predetermined additional information (2nd additional information B), without compressing 3 segment format broadcast TS, this 2nd additional information was demonstrated. If B is configured to re-multiplex the second additional information B together with the first additional information A in the 3 seg TS re-multiplexing device 6 in advance, the output of the 3 seg TS re-multiplexing device 6 is directly connected to the concatenating unit. 3 can be configured to input.

(Receiver for STL / TTL line)
FIG. 16 is a block diagram showing the configuration of the STL / TTL line receiver 10 according to the second embodiment of the present invention. In FIG. 17, the same components as those in FIG. 11 are denoted by the same reference numerals. Each functional unit in the STL / TTL line receiver 10 of the second embodiment operates in the same manner as in the first embodiment. Therefore, the STL / TTL line receiving apparatus 10 of the present embodiment receives a concatenated / combined TS that is arbitrarily concatenated and combined with a plurality of types of segment-type broadcast TS within a predetermined number of segments through the STL / TTL line. At this time, the concatenated / combined TS including the compressed broadcast TS is separated, the TSP counter value of the compressed broadcast TS is monitored, and a null packet having a predetermined TSP counter value is inserted to thereby transmit data about the compressed broadcast TS. The original broadcast TS can be restored by decompression.

Example 3
FIG. 17 shows the number of null broadcast TSs by a combination of concatenation and synthesis. The TS synthesizing unit 33 can multiplex the null broadcast TS in the same manner as the broadcast TS by generating the number of null broadcast TSs shown in FIG. 17 according to the combination of concatenation and synthesis. Therefore, the STL / TTL line transmitter 1 and the STL / TTL line receiver 10 can be configured according to the combination of concatenation and combination shown in FIG.

  In addition, the concatenating / combining unit 3 performs null broadcasting according to the total transmission speed when the three-segment broadcasting TS and the one-segment broadcasting TS are concatenated according to the combination of combining / combining shown in FIG. Appropriately determines whether or not TSs can be connected, and generates a concatenated / combined TS by concatenating and synthesizing each broadcast TS so that the total transmission rate of the concatenated / combined TS is less than or equal to the transmission rate of the STL / TTL line It can be constituted as follows.

  For example, it is possible to configure the STL / TTL line transmission apparatus 1 that can operate even with a plurality of types of combinations of broadcast TSs to be combined / combined among the combinations of concatenation / combination shown in FIG. As shown in FIG. 18, in the concatenated combining unit 3, the number of additional information adding units 31- that can selectively operate according to the combination of concatenated / combined three-segment format compressed TS and one-segment format broadcast TS. K (0 ≦ K ≦ 4) and 32-M (0 ≦ M ≦ 14) are provided, and a null broadcast TS generation unit 34-N (0 ≦ N ≦ 15) is provided. As a result, it is possible to configure the STL / TTL line transmission apparatus 1 that can operate with a plurality of combinations of broadcast TSs to be connected and combined.

  As described above, the STL / TTL line transmitting apparatus 1 and the STL / TTL line receiving apparatus 10 according to the present invention arbitrarily combine and combine a plurality of types of segment-type broadcast TSs with a predetermined number of segments or less. For example, in a multimedia broadcast transmission signal connected by 14 segments or less, a predetermined transmission speed (for example, 32.51 Mbps (= 512/63 × 4 Mbps) is used regardless of the segment configuration (1 segment format or 3 segment format). )) Since a concatenated / combined TS can be configured below, an STL / TTL line similar to terrestrial digital television broadcasting can be used. Furthermore, it is possible to reduce the processing load required for adjusting the transmission speed of the concatenated / combined TS to the same transmission speed as that of the broadcast TS of terrestrial digital broadcasting.

  The present invention has been described with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical idea thereof. For example, in each of the embodiments described above, in the STL / TTL line transmission apparatus 1, the extracted TSP table indicating the TSP TSP counter value extracted as the compressed broadcast TS (that is, the TSP counter value of the TSP not deleted in the broadcast TS). Although an example of holding was described, instead of this, an extracted TSP table indicating a TSP counter value of a TSP to be deleted to be configured as a compressed broadcast TS may be held. In the above-described embodiment, the TS remultiplexing device is distinguished from the 3seg TS remultiplexing device 6 and the 1seg TS remultiplexing device 7. However, in general, in the TS remultiplexing device, three-segment broadcasting is performed. The first TS remultiplexing unit 61 that multiplexes the first additional information A for the TS, and the first information that belongs to the classification of the first additional information A and the second additional information B for the broadcast TS of one segment format are multiplexed. What is necessary is just to comprise so that either one or both of 2 TS remultiplexing parts 71 may be provided. Here, in the TS remultiplexing device configured to include both the first TS remultiplexing unit 61 and the second TS remultiplexing unit 71, a functional block similar to the segment format determination unit 81 described above is provided, It can be configured to determine whether the broadcast TS is a three-segment format or a one-segment format, and multiplex additional information classified in advance according to the segment format.

  According to the present invention, in a transmission signal arbitrarily connected and synthesized with a predetermined number of segments or less for a plurality of types of segment-type broadcast TS, for example, in a multimedia broadcast transmission signal connected with 14 or less segments, Regardless of (1 segment format or 3 segment format), a concatenated / combined TS can be configured at a predetermined transmission rate (for example, 32.51 Mbps (= 512/63 × 4 Mbps)) or less, so that digital terrestrial television broadcasting It is useful for applications using the same STL / TTL line.

DESCRIPTION OF SYMBOLS 1 Transmission apparatus for STL / TTL line 3 Connection combining part 4 Transmission path encoding part for STL / TTL 5 RF transmission part 6,6-1,6-2,6-3,6-4 3seg TS remultiplexing apparatus 7 , 7-1,7-2 TS remultiplexer for 1seg 8 Additional information insertion controller 9,9-1,9-2,9-3,9-4 Data compression / additional information multiplexer 9a, 9a-1, 9a-2 Data compression / additional information multiplexing unit 10 STL / TTL line receiver 11 RF receiver 12 STL / TTL transmission line decoding unit 13 Separation unit 14 Data expansion unit 31-1, 31-2, 31-3 31-4, 31-K Additional information adding unit 32-1, 32-2, 32-3, 32-M Additional information adding unit 34, 34-1, 34-2, 34-5, 34-N Null broadcasting TS Generation unit 33 TS synthesis unit 50 STL / TTL line of comparative example Transmitting device 61 TS remultiplexing unit 71 TS remultiplexing unit 81 Segment format determination unit 82 Additional information insertion control unit 91 TSP buffer 92 TSP counter value extraction unit 93 Extraction TSP table selection control unit 93a Extraction TSP table storage unit 94 TSP extraction unit 95 Additional information multiplexing section

Claims (6)

A transmission apparatus for an STL / TTL line that transmits a concatenated / combined TS that is arbitrarily concatenated and combined with a predetermined number of segments or less of a plurality of types of segment-type broadcast TSs via an STL / TTL line,
In monitoring the TSP counter value of the first segment format broadcast TS among the plurality of types of segment format broadcast TS, and deleting the null packet of the TSP counter value determined in advance according to the transmission parameter of the broadcast TS Then, by deleting the null packet based on a predetermined extracted TSP table in which the TSP amount to be shifted is minimized, a data compression is performed on the broadcast TS to generate a compressed broadcast TS, and the data compression is performed. Data compression / additional information multiplexing means for multiplexing predetermined additional information after
A concatenation that generates a concatenated / combined TS by concatenating the second segment format broadcast TS that is not subjected to the data compression, the compressed broadcast TS, and the null broadcast TS among the plurality of types of segment format broadcast TSs. Combining means;
Transmitting means for applying a predetermined transmission line encoding to the concatenated / combined TS and transmitting the same to the outside via an STL / TTL line;
An STL / TTL line transmission apparatus comprising: The concatenating / combining means includes means for inserting a flag for determining the distinction between the compressed broadcast TS and the null broadcast TS into the predetermined additional information when generating the concatenated / combined TS. The STL / TTL line transmitting apparatus according to claim 1 .   The connection combining means adaptively determines the number of connections of the null broadcast TS according to a transmission rate determined by a combination of the broadcast TS of the second segment format and the compressed broadcast TS, whereby the STL / TTL line 3. The STL / TTL line transmitting apparatus according to claim 1, further comprising TS combining means for generating a concatenated / combined TS that matches the transmission rate of the STL / TTL line. A connected / combined TS that is arbitrarily connected and combined with a predetermined number of segments or less of a plurality of types of segment-type broadcast TS transmitted from the STL / TTL transmission device according to any one of claims 1 to 3. A STL / TTL line receiving apparatus for receiving via an STL / TTL line,
On the transmission side, the TSP counter value of the first segment format broadcast TS among the plurality of types of segment format broadcast TS is monitored, and a null packet of a TSP counter value determined in advance according to the transmission parameter of the broadcast TS , A compressed broadcast TS that has been subjected to data compression by deleting null packets based on a predetermined extraction TSP table in which a minimum amount of TSP to be shifted is selected in advance, and the plurality of segment formats Of the second segment format TS that is not subjected to data compression, and the null broadcast TS, and the combined TS that is combined and combined into the plurality of types of segment formats. Means,
The TSP counter value of the compressed broadcast TS is monitored. When the TSP counter value is a continuous value, the TSP is connected in the order in which the compressed broadcast TS is separated, and when the TSP counter value is not a continuous value, the TSP counter value is Data decompression means for inserting a null packet and restoring the broadcast TS until becomes a continuous value;
An STL / TTL line receiving apparatus comprising:   5. The STL / of claim 4, wherein the separation means includes means for referring to the predetermined additional information to determine and separate the distinction between the compressed broadcast TS and the null broadcast TS. TTL line receiver.   The said demultiplexing means is provided with a means to delete the null packet inserted so that it might become a fixed transmission rate which can be transmitted with the said STL / TTL line | wire on the transmission side, The Claim 4 or 5 characterized by the above-mentioned. STL / TTL line receiver.