JP6559044B2 - Transmitter, receiver and chip - Google Patents

Description

  The present invention relates to a transmitter, a receiver, and a chip.

  Conventionally, an FPU (Field Pickup Unit) system has been used for transmission of program material. The FPU system is indispensable as a tool for relaying programs and sending video coverage to broadcast stations.

  In recent years, a digital FPU system using an OFDM (Orthogonal Frequency Division Multiplexing) system that is resistant to frequency selective fading has attracted attention, and such a digital FPU system has already been practically used in various frequency bands. Standards have been proposed (see Non-Patent Documents 1 to 4).

  5 and 6 show an outline of the transmitter 10 and the receiver 30 in the FPU system.

  As an input interface to the FPU modulation unit in the transmitter 10 shown in FIG. 5 and an output interface from the FPU demodulation unit in the transmitter 30 shown in FIG. 6, DVB-ASI (Digital Video Broadcasting-Asynchronous Serial) using a coaxial cable is used. The interface method is widely used (see Non-Patent Document 5).

  The maximum transmission rate of the DVB-ASI system is 216 Mbps. Actually, the upper limit of the transmission rate of the DVB-ASI method is about 213 Mbps by removing a synchronization word or the like, but the transmission rate of the conventional digital FPU method is about 70 Mbps at the maximum (Non-Patent Document 2). The DVB-ASI method has no problem as an input / output interface for the modulation unit and the demodulation unit of the FPU method.

Portable microwave band digital radio transmission system for transmitting television broadcast program material, standard (ARIB STD-B11 version 2.2), Japan Radio Industry Association Portable ODFDM digital wireless transmission system for transmitting television broadcast program material, standard (ARIB STD-B33 1.2 version), Japan Radio Industry Association Portable millimeter-wave band digital radio transmission system for transmitting television broadcast program material, standard (ARIB STD-B431.0 version), Japan Radio Industry Association 1.2GHz / 2.3GHz band portable OFDM digital wireless transmission system for broadcasting program material transmission, standard (ARIB STD-B57 version 2.0), Japan Radio Industry Association "Cabled distribution systems for television, sound and interactive multimedia signals Part 9: Interactive for CATV / SMATV headends and similar professional equipment for DVB / MPEG-2 transport streams", standard (ETSI EN 50083-9), European Telecommunications Standards Institute

  However, the standard of Non-Patent Document 2 can transmit at a maximum of about 400 Mbps, and the transmission rate can be increased by applying a MIMO (Multiple Input Multiple Output) method or the like in other standards as well. . As described above, the DVB-ASI interface is becoming a bottleneck as the FPU transmission rate increases.

  In order to eliminate such bottlenecks, interfaces using other cables capable of faster input / output, such as Ethernet (registered trademark) and optical fiber, are being considered. Considering the diversion of equipment, the DVB-ASI method is still a powerful interface.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a transmitter, a receiver, and a chip that can eliminate a bottleneck of an DVB-ASI interface in an FPU system. For the purpose.

が成立する場合に、ｎがいずれの値を採る場合であっても、Ｒ_{ＡＳＩ-ｎ}＜Ｒ_ＦＰＵ×Ｐ_ｎ/８が成立するように構成されており、前記Ｎ個の入力処理部のうちのｎ番目の入力処理部における前記レート調整部は、前記ＴＳパケットのレートを「Ｒ_{ＡＳＩ-ｎ}」から「Ｒ_ＦＰＵ×Ｐ_ｎ/８」に変更するように構成されていることを要旨とする。 A first feature of the present invention is a transmitter, wherein N is a natural number of 2 or more and 8 or less, n is a natural number of N or less, N input processing units, and the N inputs A synchronization multiplexing unit configured to multiplex TS packets output from each of the processing units to form a data frame and perform synchronization processing in units of the data frame, and the N input Each of the processing units includes a DVB-ASI reception processing unit configured to perform reception processing on a DVB-ASI format signal including the TS packet input via a DVB-ASI format input terminal; A rate adjusting unit configured to change and output the rate of TS packets, and R _ASI-n is a rate of the TS packets included in the signal input to the input terminal, and , TS A rate when packet length is 204 bytes, R _FPU is a rate of the TS packets may be transmitted in the system of FPU scheme, and a rate when the TS packet length is 204 bytes,

R _ASI-n <R _FPU × P _n / 8 is established so that no _matter what value n takes when N holds, among the N input processing units The rate adjustment unit in the n-th input processing unit is configured to change the rate of the TS packet from “R _ASI-n ” to “R _FPU × P _n / 8”. .

が成立する場合に、ｎがいずれの値を採る場合であっても、Ｒ_{ＡＳＩ-ｎ}＜Ｒ_ＦＰＵ×Ｐ_ｎ/８が成立するように構成されており、前記Ｎ個の出力処理部のうちのｎ番目の出力処理部における前記レート調整部は、前記ＴＳパケットのレートを「Ｒ_ＦＰＵ×Ｐ_ｎ/８」から「Ｒ_{ＡＳＩ-ｎ}」に変更するように構成されていることを要旨とする。 A second feature of the present invention is a receiver configured to receive a TS packet transmitted by the transmitter according to the first feature described above, wherein N is a natural number of 2 or more and 8 or less. Yes, n is a natural number equal to or less than N so that the TS packets are separated from the N output processing units and the data frame received from the FPU system and output to each of the N output processing units. A rate at which each of the N output processing units is configured to change and output a rate of the TS packet output from the separation unit. An adjustment unit, and a DVB-ASI transmission processing unit configured to generate a DVB-ASI system signal including the TS packet and output the signal through an output terminal of the DVB-ASI system, R _ASI-n , At a rate of the TS packets included in the signal output through the output terminal, and a rate when the TS packet length is 204 bytes, R _FPU is received from the system of the FPU scheme It is the rate when the TS packet rate is 204 bytes and the TS packet length is 204 bytes,

R _ASI-n <R _FPU × P _n / 8 is satisfied regardless of the value of n when _n is satisfied, and among the N output processing units, The rate adjustment unit in the n-th output processing unit is configured to change the rate of the TS packet from “R _FPU × P _n / 8” to “R _ASI-n ”. .

が成立する場合に、ｎがいずれの値を採る場合であっても、Ｒ_{ＡＳＩ-ｎ}＜Ｒ_ＦＰＵ×Ｐ_ｎ/８が成立するように構成されており、前記Ｎ個の入力処理部のうちのｎ番目の入力処理部における前記レート調整部は、前記ＴＳパケットのレートを「Ｒ_{ＡＳＩ-ｎ}」から「Ｒ_ＦＰＵ×Ｐ_ｎ/８」に変更するように構成されており、前記チップは、前記Ｎ個のレート調整部及び前記同期多重部を具備するように構成されていることを要旨とする。 A third feature of the present invention is a chip mounted on a transmitter, where N is a natural number of 2 or more and 8 or less, n is a natural number of N or less, and the transmitter includes N An input processing unit, and a synchronization multiplexing unit configured to multiplex TS packets output from each of the N input processing units to form a data frame and to perform synchronization processing in units of the data frame Each of the N input processing units is configured to perform reception processing on a DVB-ASI format signal including the TS packet input via a DVB-ASI format input terminal. A DVB-ASI reception processing unit and a rate adjustment unit configured to change and output the rate of the TS packet, and R _ASI-n is connected to the signal input to the input terminal. The TS pars included In Tsu City of rates, and the a rate when the TS packet length is 204 _{bytes, R FPU} is a rate of the TS packets may be transmitted in the system of FPU scheme, and the TS packet length 204 The rate if it is in bytes,

R _ASI-n <R _FPU × P _n / 8 is established so that no _matter what value n takes when N holds, among the N input processing units The rate adjustment unit in the n-th input processing unit is configured to change the rate of the TS packet from “R _ASI-n ” to “R _FPU × P _n / 8”. The gist is that the N rate adjusting unit and the synchronous multiplexing unit are provided.

が成立する場合に、ｎがいずれの値を採る場合であっても、Ｒ_{ＡＳＩ-ｎ}＜Ｒ_ＦＰＵ×Ｐ_ｎ/８が成立するように構成されており、前記Ｎ個の出力処理部のうちのｎ番目の出力処理部における前記レート調整部は、前記ＴＳパケットのレートを「Ｒ_ＦＰＵ×Ｐ_ｎ/８」から「Ｒ_{ＡＳＩ-ｎ}」に変更するように構成されており、前記チップは、前記分離部及び前記Ｎ個のレート調整部を具備するように構成されていることを要旨とする。 A fourth feature of the present invention is a chip mounted on a receiver configured to receive a TS packet transmitted by the transmitter according to the first feature described above, where N is 2 or more. The natural number is 8 or less, n is a natural number of N or less, and the receiver separates the TS packet from the data frame received from the N output processing units and the FPU system, and the N A separation unit configured to output to each of the output processing units, wherein each of the N output processing units changes a rate of the TS packet output from the separation unit. A rate adjusting unit configured to output the signal, and a DVB-ASI configured to generate and output a DVB-ASI signal including the TS packet via an output terminal of the DVB-ASI method Send processing And comprising bets, R _ASI-n is the rate of the TS packets included in the signal output through the output terminal, and a rate when the TS packet length is 204 bytes, R _FPU is the rate of the TS packet received from the FPU system and the rate when the TS packet length is 204 bytes,

R _ASI-n <R _FPU × P _n / 8 is satisfied regardless of the value of n when _n is satisfied, and among the N output processing units, The rate adjustment unit in the n-th output processing unit is configured to change the rate of the TS packet from “R _FPU × P _n / 8” to “R _ASI-n ”. The gist is that the separation unit and the N rate adjustment units are provided.

  ADVANTAGE OF THE INVENTION According to this invention, the transmitter, receiver, and chip | tip which can eliminate the bottleneck of the interface of a DVB-ASI system in an FPU system can be provided.

FIG. 1 is a functional block diagram of a transmitter 10 according to the first embodiment. FIG. 2 is a diagram for explaining the functions of the data frame synchronization / multiplexing unit 10E of the transmitter 10 according to the first embodiment and the TS packet reconstruction unit 30B of the receiver 30 according to the first embodiment. . FIG. 3 shows the number of TS packets P _n allocated to each input processing unit (each output processing unit of the receiver 30) of the transmitter 10 according to the first embodiment among the eight TS packets in the data frame. It is a figure which shows the combination. FIG. 4 is a functional block diagram of the receiver 30 according to the first embodiment. FIG. 5 is a functional block diagram of the conventional transmitter 10. FIG. 6 is a functional block diagram of the conventional transmitter 10.

(First embodiment)
Hereinafter, the transmitter 10 and the receiver 30 according to the first embodiment of the present invention will be described with reference to FIGS. Here, the transmitter 10 and the receiver 30 according to the first embodiment of the present invention are used in a digital FPU system. In the present embodiment, N is a natural number of 2 or more and 8 or less, and n is a natural number of N or less.

  The digital FPU system including the transmitter 10 and the receiver 30 according to the first embodiment of the present invention is useful, for example, as a material transmission technique in broadcast program production work.

As shown in FIG. 1, the transmitter 10 according to this embodiment includes N input processing unit ₂₀ 1 to 20 _N, a data frame synchronization and multiplexing section 10E, and a modulation unit 10F.

Each of the N input processing unit ₂₀ 1 to 20 _N includes a DVB-ASI receiver unit ₂₁ 1 through 21 _N, and a TS packet length changing portion _10C 1 _{~10C N,} and rate adjustment stuffing unit _10D 1 _{~10D N} It has.

Each of the N DVB-ASI reception processing units 21 _{1 to} 21 _N includes a DVB-ASI format signal ASI-1 including a TS packet input via each of the DVB-ASI format input terminals 1 to _N. N is configured to perform reception processing for N.

Specifically, each of the N DVB-ASI reception processing units 21 _{1 to} 21 _N includes a DVB-ASI synchronization word / stuffing removal unit 10A _{1 to} 10A _N , a 10B / 8B decoding unit 10B _{1 to} 10B _N, and It has.

Each of the DVB-ASI synchronization word stuffing removal units 10A _{1 to} 10A _N is configured to perform processing for removing the synchronization word and stuffing on the input DVB-ASI signal. The processing performed by the DVB-ASI synchronous word stuffing removal units 10A _{1 to} 10A _N is described in Non-Patent Document 5 described above.

Each of the 10B / 8B decoding units 10B _{1 to} 10B _N is configured to perform 10B / 8B decoding processing on the signals input from each of the DVB-ASI synchronous word and stuffing removal units 10A _{1 to} 10A _N. ing. Such 10B / 8B decoding processing is described in Non-Patent Document 5 described above.

Each TS packet length changing portion _10C 1 _{~10C N,} when the length of the TS packets included in each input from the signal of 10B / 8B decoding section _10B 1 _{~10B N} is 188 bytes, according The TS packet length is changed from 188 bytes to 204 bytes.

In general, the signals ASI-1 to N in the DVB-ASI system can include either a 188-byte TS packet or a 204-byte TS packet. Here, in the digital FPU system, it is necessary to input data as 204-byte data to the modulation unit (the modulation unit 10F in the transmitter 10 according to the present embodiment). Therefore, normally, it is set so that 204-byte TS packets are input via the DVB-ASI input terminals 1 to N. However, in the transmitter 10 according to the present embodiment, the TS packet length changing unit is set. Each of 10C _{1 to} 10CN can be converted into a 204-byte TS packet even when a 188-byte TS packet is input via the DVB-ASI input terminals 1 to _N.

Here, the rate of the 204-byte TS packet output from the TS packet length changing unit 10C _n in the n-th input processing unit 20 _n is assumed to be “R _ASI-n ”. Note that “R _ASI-n ” is also the rate of TS packets included in the DVB-ASI format signal input to the DVB-ASI format input terminal n.

Rate each adjustment stuffing portion _10D 1 _{~10D N} is configured to output by changing the rate of the TS packets input from each of the TS packet length changing portion _10C 1 _{~10C N.}

Specifically, each of the rate adjustment stuffing units 10D _{1 to} 10D _N inserts a null packet into the TS packet input from each of the TS packet length changing units 10C _{1 to} 10C _N , thereby It is configured to output by changing the rate.

Here, the rate of the TS packet output from the rate adjustment stuffing unit 10D _n in the n-th input processing unit 20 _n is assumed to be “R _FPU × P _n / 8”. “R _FPU ” is a rate when the TS packet length is 204 bytes, and is a rate of TS packets that can be transmitted in an FPU system.

That is, in the transmitter 10 (and the receiver 30) according to the present embodiment, eight TSs in one data frame are included in the n-th DVB-ASI system (for example, the input processing unit 20 _n ). Among the packets, P _n TS packets are allocated.

Here, as shown in FIG. 2A, the rate adjustment stuffing unit 10D _n in the n-th DVB-ASI system (for example, the input processing unit 20 _n ) sets the rate of the TS packet to “R _ASI-n. To “R _FPU × P _n / 8”.

が成立する。かかる場合、ｎがいずれの値を採る場合であっても、Ｒ_{ＡＳＩ-ｎ}＜Ｒ_ＦＰＵ×Ｐ_ｎ/８が成立するように構成されている。ここで、Ｎは、本実施形態に係る送信機１０において多重するＤＶＢ-ＡＳＩ方式の信号の本数であり、Ｎの最大値は「８」である。図３に、上述のＰ_ｎが取り得る値の組み合わせを示す。なお、かかる組み合わせについては、送信機１０と受信機３０との間で共有されているものとする。 In the transmitter 10 (and receiver 30) according to the present embodiment,

Is established. In such a case, the configuration is such that R _ASI-n <R _FPU × P _n / 8 holds regardless of the value of _n . Here, N is the number of DVB-ASI signals multiplexed in the transmitter 10 according to the present embodiment, and the maximum value of N is “8”. FIG. 3 shows combinations of values that _Pn can take. Such a combination is assumed to be shared between the transmitter 10 and the receiver 30.

As shown in FIG. 3, for example, when the number of multiplexed DVB-ASI signals is “2”, the number of TS packets P ₁ allocated to the DVB-ASI signal ASI- ₁ and the DVB-ASI method the combination of the TS packet number _{P 2} allocated to the signal ASI-2 of, be either (7,1) (6,2) (5,3) (4,4).

For example, when the combination of P ₁ and P ₂ is (4, 4), the transmitter 10 divides the rate of TS packets that can be transmitted in the FPU system into two equal parts, and two DVB-ASI systems This corresponds to the case where the signal is separated.

In such a case, DVB-ASI method of signal ASI-1 and DVB-ASI system rate of the TS packet system may be transmitted in the FPU scheme allocated to the signal ASI-2 of each _{"R FPU} × _{P 1/8"} and next _{"R FPU} × _{P 2/8", "R ASI-1 <R FPU ×} P 1/8 " and _{"R ASI-2 <R FPU ×} P 2/8 " of the system of FPU scheme as is established Transmission parameters shall be set.

That is, the rate of TS packets allocated to the DVB-ASI system signal ASI-n (the transmission rate of the FPU system) is P _n / 8, so in all n (= 1, 2,... N), Transmission parameters of the FPU system (for example, parameters such as the number of modulation multi-values and error correction coding rate) are set so that R _ASI-n <R _FPU × P _n / 8 holds.

  According to this configuration, since allocation of eight TS packets in one data frame to each DVB-ASI system can be changed, two or more and eight or less DVB-ASI system signals ASI- n can be multiplexed.

The data frame synchronization / multiplexing unit 10E is configured to multiplex TS packets output from each of the _N input processing units 20 _{1 to} 20 _N to form a data frame and perform synchronization processing in units of data frames. ing.

  As shown in FIGS. 2A and 2B, one data frame is composed of eight TS packets. Here, the data frame synchronization / multiplexing unit 10E reverses the value of the data frame synchronization byte of the first TS packet of each data frame to “B8h” from the normal “47h”, thereby synchronizing the data frame unit. It is configured to perform processing.

The data frame synchronization / multiplexing unit 10E is configured to multiplex _Pn TS packets output from the _nth input processing unit 20n within one data frame.

  The order in which TS packets are arranged in each data frame is arbitrary. However, this order is assumed to be shared between the transmitter 10 and the receiver 30. As a result, the receiver 30 can reconstruct the TS packet based on the data frame synchronization byte.

  The modulation unit 10F is an FPU modulation unit and is configured to perform modulation processing on the data frame input from the data frame synchronization / multiplexing unit 10E.

As shown in FIG. 4, the receiver 30 according to the present embodiment includes a demodulation unit 30A, a TS packet reconstruction / separation unit 30B, and N output processing units 40 ₁ to 40 _N.

  The demodulator 30A is an FPU demodulator, and is configured to perform demodulation processing on the signal transmitted by the transmitter 10 described above.

The TS packet reconstruction / separation unit 30B is configured to separate the TS packet from the data frame received from the demodulation unit 30A (FPU system) and output it to each of the _N output processing units 40 ₁ to 40 _N. Has been.

Specifically, the TS packet reconstruction / separation unit 30B performs processing reverse to that of the data frame synchronization / multiplexing unit 10E, that is, the output processing unit 40 that separates TS packets in each data frame and corresponds to each TS packet. and it is configured to output to each of the ₁ to 40 _N.

  The TS packet reconstruction / separation unit 30B is configured to return the data frame synchronization byte of the first TS packet of each data frame from “B8h” to “47h”.

Each of the N output processing unit ₄₀ 1 to 40 _N includes a null packet removing unit _30C 1 _{~30C N,} and the TS packet length selection portion _30D 1 _{~30D N,} and DVB-ASI transmission processing unit ₄₁ 1 to 41 _N It has.

Null packet eliminating unit _30C 1 _{~30C N} by eliminating null packets from the TS packets input from the TS packet reconstruction and separating part 30B, the rate of the TS packet inputted from the TS packet reconstruction and separating part 30B Is configured to output.

Rate of the TS packets input from the TS packet reconstruction and separating part 30B to the n-th null packet packet removal unit 30C _n is _{"R FPU} × _{P n} / 8". Here, “R _FPU ” is the rate of TS packets (when the TS packet length is 204 bytes) input from the demodulator 30A (FPU system) to the TS packet reconstruction / separation unit 30B.

On the other hand, the rate of the TS packets input from the n-th null packet packet removal unit 30C _n to n-th TS packet length selection portion 30Dn is _{"R ASI-n".} Here, “R _ASI-n ” is the same as “R _ASI-n ” shown in FIG. Note that “R _ASI-n ” is the TS packet rate (when the TS packet length is 204 bytes) included in the DVB-ASI format signal output via the DVB-ASI format output terminals 1 to N. is there.

That, n-th null packet packet removal unit 30C _n is null packet removal unit 30C _n in the n-th output processing section 40 _n of the N output processing unit ₄₀ 1 to 40 _N, the rate of the TS packet It is configured to change from “R _FPU × P _n / 8” to “R _ASI-n ”.

TS packet length selection portion _30D 1 _{~30D N} is configured to include a signal DVB-ASI scheme set one of 188 bytes or 204 bytes the length of the TS packet.

The length of the TS packet included in the DVB-ASI format signal output via the DVB-ASI format output terminals 1 to N is normally 204 bytes. However, according to the receiver 30 according to the present embodiment, if, by the TS packet length selection portion _30D 1 _{~30D N,} it is possible to convert the length of such TS packets to 188 bytes.

DVB-ASI each of the transmission processing unit ₄₁ 1 to 41 _N, the output terminal of the generates a signal DVB-ASI scheme DVB-ASI method comprising TS packets input from the TS packet length selection portion _30D 1 _{~30D N} 1 to N to output.

As shown in FIG. 4, each of the DVB-ASI transmission processing units 41 _{1 to} 41 _N includes an 8B / 10B encoding unit 30E _{1 to} 30E _N and a DVB-ASI synchronization word and stuffing insertion unit 30F _{1 to} 30F _N. It has.

Each of 8B / 10B encoding unit _30E 1 _{~30E N,} to the TS packet inputted from the TS packet length selection portion _30D 1 _{~30D N,} is configured to perform the 8B / 10B encoding. Such 8B / 10B encoding processing is described in Non-Patent Document 5 described above.

DVB-ASI synchronization word stuffing insertion portion _30F 1 _{~30F N,} to the TS packets input from each of the 8B / 10B encoding unit _30E 1 _{~30E N,} to perform a process of inserting a sync word and stuffing It is configured. The process performed by the DVB-ASI synchronization word stuffing insertion portion _30F 1 _{~30F N} is described in non-patent document 5 described above.

  According to the transmitter 10 and the receiver 30 according to the present embodiment, a DVB-ASI format signal having a maximum transmission rate or more can be divided into a plurality of DVB-ASI format signals and transmitted. Further, according to the transmitter 10 and the receiver 30 according to the present embodiment, a plurality of different DVB-ASI signals can be transmitted by one FPU device.

  In addition, according to the transmitter 10 and the receiver 30 according to the present embodiment, the data frame synchronization processing used in the existing FPU method is utilized, and a maximum of eight can be used without adopting a new frame structure. Multiplexing and demultiplexing of DVB-ASI signals can be realized.

  Furthermore, according to the transmitter 10 and the receiver 30 according to the present embodiment, the number of TS packets allocated to DVB-ASI signals to be multiplexed can be flexibly changed, so that transmission efficiency can be increased.

(Other embodiments)
As described above, the present invention has been described by using the above-described embodiment. However, it should not be understood that the description and drawings constituting a part of the disclosure in the embodiment limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  Further, although not particularly mentioned in the above embodiment, a program for causing a computer to execute each process performed by the transmitter 10 and the receiver 30 may be provided. Such a program may be recorded on a computer-readable medium. If a computer readable medium is used, such a program can be installed in the computer. Here, the computer-readable medium on which such a program is recorded may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, but may be a recording medium such as a CD-ROM or a DVD-ROM.

  Or the chip | tip comprised by the processor which executes the program memorize | stored in the memory which memorize | stores the program for implement | achieving at least one part function in the above-mentioned transmitter 10 and the receiver 30, and the memory may be provided. .

10 ... transmitter ₂₀ 1 to 20 N _... input processing unit ₂₁ 1 _~21 N ... DVB-ASI receiver unit _10A 1 _{~10A N} ... DVB-ASI synchronization word stuffing removing portion _10B 1 _{~10B N} ... _10B / 8B decoding Unit 10C _{1 to} 10C _N ... TS packet length change unit 10D _{1 to} 10D _N ... rate adjustment stuffing unit 10E ... data frame synchronization / multiplexing unit 10F ... modulation unit 30 ... receivers 40 ₁ to 40 _N ... output processing unit 41 ₁ to 41 _N ... DVB-ASI transmission processing unit 30A ... demodulating unit 30B ... TS packet reconstruction and separating unit _30C 1 _~30C N _... null packet removal unit _30D 1 _{~30D N} ... TS packet length selection portion _30E 1 _{~30E N} ... 8B / 10B encoding unit 30F _{1 to} 30F _N ... DVB-ASI synchronous word stuffing insertion unit

Claims (6)

A transmitter,
N is a natural number of 2 or more and 8 or less, n is a natural number of N or less,
N input processing units;
A data multiplexing unit configured to multiplex TS packets output from each of the N input processing units, and a synchronization multiplexing unit configured to perform synchronization processing in units of the data frame,
Each of the N input processing units includes:
A DVB-ASI reception processing unit configured to perform reception processing on a DVB-ASI format signal including the TS packet input via a DVB-ASI format input terminal;
A rate adjustment unit configured to change and output the rate of the TS packet;
R _ASI-n is the rate of the TS packet included in the signal input to the input terminal, and the rate when the TS packet length is 204 bytes,
R _FPU is a rate of the TS packet that can be transmitted in an FPU system, and a rate when the TS packet length is 204 bytes.

R _ASI-n <R _FPU × P _n / 8 is established regardless of the value of n when n holds.
The rate adjusting unit in the nth input processing unit among the N input processing units changes the rate of the TS packet from “R _ASI-n ” to “R _FPU × P _n / 8”. A transmitter characterized in that it is configured.   Each of the N input processing units is configured to change the TS packet length from 188 bytes to 204 bytes when the length of the TS packet is 188 bytes. The transmitter according to claim 1, further comprising a unit. A receiver configured to receive a TS packet transmitted by a transmitter as recited in claim 1, comprising:
N is a natural number of 2 or more and 8 or less, n is a natural number of N or less,
N output processing units;
A separation unit configured to separate the TS packet from a data frame received from an FPU system and output the separated TS packet to each of the N output processing units;
Each of the N output processing units includes:
A rate adjustment unit configured to change and output the rate of the TS packet output from the separation unit;
A DVB-ASI transmission processing unit configured to generate a DVB-ASI system signal including the TS packet and output the signal through a DVB-ASI system output terminal;
R _ASI-n is the rate of the TS packet included in the signal output via the output terminal, and the rate when the TS packet length is 204 bytes,
R _FPU is the rate of the TS packet received from the FPU system and the rate when the TS packet length is 204 bytes,

R _ASI-n <R _FPU × P _n / 8 is established regardless of the value of n when n holds.
The rate adjusting unit in the nth output processing unit among the N output processing units changes the rate of the TS packet from “R _FPU × P _n / 8” to “R _ASI-n ”. A receiver characterized in that it is configured.   Each of the N output processing units includes a TS packet length selection unit configured to set the length of the TS packet to either 188 bytes or 204 bytes to be included in the signal. The receiver according to claim 3. A chip mounted on the transmitter,
N is a natural number of 2 or more and 8 or less, n is a natural number of N or less,
The transmitter is
N input processing units;
A data multiplexing unit configured to multiplex TS packets output from each of the N input processing units, and a synchronization multiplexing unit configured to perform synchronization processing in units of the data frame,
Each of the N input processing units includes:
A DVB-ASI reception processing unit configured to perform reception processing on a DVB-ASI format signal including the TS packet input via a DVB-ASI format input terminal;
A rate adjustment unit configured to change and output the rate of the TS packet;
R _ASI-n is the rate of the TS packet included in the signal input to the input terminal, and the rate when the TS packet length is 204 bytes,
R _FPU is a rate of the TS packet that can be transmitted in an FPU system, and a rate when the TS packet length is 204 bytes.

R _ASI-n <R _FPU × P _n / 8 is established regardless of the value of n when n holds.
The rate adjusting unit in the nth input processing unit among the N input processing units changes the rate of the TS packet from “R _ASI-n ” to “R _FPU × P _n / 8”. Configured,
The chip is configured to include the N rate adjusting units and the synchronous multiplexing unit. A chip mounted on a receiver configured to receive a TS packet transmitted by the transmitter of claim 1, comprising:
N is a natural number of 2 or more and 8 or less, n is a natural number of N or less,
The receiver
N output processing units;
A separation unit configured to separate the TS packet from a data frame received from an FPU system and output the separated TS packet to each of the N output processing units;
Each of the N output processing units includes:
A rate adjustment unit configured to change and output the rate of the TS packet output from the separation unit;
A DVB-ASI transmission processing unit configured to generate a DVB-ASI system signal including the TS packet and output the signal through a DVB-ASI system output terminal;
R _ASI-n is the rate of the TS packet included in the signal output via the output terminal, and the rate when the TS packet length is 204 bytes,
R _FPU is the rate of the TS packet received from the FPU system and the rate when the TS packet length is 204 bytes,

R _ASI-n <R _FPU × P _n / 8 is established regardless of the value of n when n holds.
The rate adjusting unit in the nth output processing unit among the N output processing units changes the rate of the TS packet from “R _FPU × P _n / 8” to “R _ASI-n ”. Configured,
The chip is configured to include the separation unit and the N rate adjustment units.

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