WO2005048494A1 - Method and system for delivering signal - Google Patents

Method and system for delivering signal Download PDF

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Publication number
WO2005048494A1
WO2005048494A1 PCT/JP2003/014521 JP0314521W WO2005048494A1 WO 2005048494 A1 WO2005048494 A1 WO 2005048494A1 JP 0314521 W JP0314521 W JP 0314521W WO 2005048494 A1 WO2005048494 A1 WO 2005048494A1
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WO
WIPO (PCT)
Prior art keywords
signal
transmission
supplied
synchronous network
network
Prior art date
Application number
PCT/JP2003/014521
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshiyuki Karakawa
Masaki Bansho
Yuji Kuroki
Junichi Kawaguchi
Koji Hachiya
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2003/014521 priority Critical patent/WO2005048494A1/en
Priority claimed from US10/887,471 external-priority patent/US7593425B2/en
Publication of WO2005048494A1 publication Critical patent/WO2005048494A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385Channel allocation; Bandwidth allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/16Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams

Abstract

A method for supplying the transport packets of television signals multiplexing a plurality of channels in a transmission format of digital broadcast standard and transmitting/delivering them over a synchronous network, wherein the band of the synchronous network is assigned and operated flexibly to satisfy the request of a client by setting a transmission rate in the synchronous network depending on the number of mutiplxed channels of each client.

Description

Specification signal distribution method and apparatus TECHNICAL FIELD

The present invention relates to a signal distribution method and apparatus, SONETZSDH (Syn chronous Op tical Ne two rk / Syn cnronos D igital H ierarc hy) signal distribution method and apparatus for distributing television signals using synchronous network such as on. BACKGROUND

Conventional CATV television signal distribution from (CAb 1 e Te l ev isi on) station or DTV (D igital Te l ev isi on) station to the user, using a 64 QAM (Qu adrature Amp litude Mo du lation) method delivery by analog scheme was the mainstream.

Figure 1 shows a block diagram of an example of a conventional television signal distribution system. In the figure, after Ddoendo station TV job N'i No. received from 10, for example, satellite broadcasting, which is 64 QAM modulated by I RT (I ntegrated Re ceiver Tr anscoder) 11 to CATV for the frequency to a high frequency signal RF by the converter 12 is converted, multiplexed I spoon in multiplexing section 13, it is transmitted from the transmitting unit 14 to the network 15 in analog signal form. Radio frequency signal RF analog signal "^ state received from the network 15 by the receiver 16 is distributed to a plurality of systems at the distribution unit 17, is distributed to each user through each coaxial cable 19 after being amplified by the amplifier 18. The analog system is old systems, this and or the number of channels per line can not be taken large, could not corresponding to the cable telephone or the like. Recently CATV distribution from the head-end station of the conversion to a digital signal via the C OD EC device some in tree f-life change in the method for distributing go.

Figure 2 shows a block diagram of another example of a conventional television signal distribution system. In the figure, a television signal received from the head-end station 20, for example, satellite broadcasting of CATV is Ru is supplied to the I RT 21 at 64 Q AM modulated by the modem transmitting unit 23. Moreover, 64 QAM modulated television signal of another channel from Bideosuitsuchi 22 is supplied to the modem transmitting unit 23.

Converting electrical / optical multiplexed I spoon After digital Louis spoon the modem 64 Q AM modulated signal in the transmission section 23 encodes each channel, for example, optical signal transmission rate 2. 38 GB ps. The optical signal is issued sent to the optical transmission line 25 is further light multiplexed by the optical multiplexing unit 24.

Optical signal from the optical transmission line 25 is separated into each wavelength by the optical separation unit 26 is demultiplexed into respective channels after being converted photoelectrochemical the modem receiving unit 27, 64q AM the being decrypted analog per channel It is modulated signals. The .64Q AM modulated signal is frequency-converted to radio frequency signal RF in the converter 28, the high frequency signal RF is distributed to a plurality of systems at the distribution unit 29, each user through each coaxial cable 31 after being amplified by the amplifier 30 It is delivered to.

Here, not compressed television signal is directly used as 64 Q AM modulated signal using the bandwidth of one channel per 155. 52 Mb ps, modem transmitting unit 23, a 2. 388Gb ps multiplexes the signal bundling further repeated multiplexing, NX 2.

388Gb ps (N is an arbitrary integer) is doing a delivery in. ■ Since this method does not compress the television signal, 1 require bandwidth per channel 155M bps, also poor affinity with different for the SONET / SDH apparatus and the signal transmission rate of the transmission rate SONETZSDH, services of cable telephone, etc. can not be.

To solve this problem, there is a method using the CODEC unit and SONET / SDH transmission apparatus. Figure 3 shows a block diagram of another example of a conventional television signal distribution system.

3, the television signal received from a Ddoendo station 40 for example satellite is subjected fed to the modem radical 149 43 is 64 Q AM modulated by I RT 41 to CATV for. Further, the modem transmitting unit 43 of the other channels from the video switch 42 6

4 Q AM modulated television signal is supplied.

Converting electrical / optical modulation and demodulation 64 QAM modulated signal in the transmission section 43 multiplexes After digitization and encoded for each channel, is mapped to SO NET / SDH path STS x X 1 channel per 155 Mb ps is supplied to the SONET / SDH transmission unit 44, it is sent to the optical transmission line 4 5 as signal through the SONETZSDH from SONETZSDH transmitting unit 44 line O C- x X (O tical Ca rrie r-χχ).

Optical signal of the optical transmission line 45 forces we received at SONET / SD H receiver 46, the electrical signals mapped to SO NET / SDH path STS XX is obtained. Electrical This signal is demultiplexed into respective channels by the modem receiver section 47, is decoded for each channel are 64 Q AM modulated signal of the analog. The 64q AM modulated signal is frequency-converted to radio frequency signal RF by the converter 48, the high frequency signal RF is delivered is distributed in a plurality of systems at the distribution unit 4 9 to each user.

This method is very costly as compared to conventional analog transmission system, or control of the entire system becomes Managing 及 Pi SONE TZ SDH dedicated equipment of the CODE C device has a double management It had become complicated.

To solve this problem, the transmission Fomatsuto of which is one of the European digital broadcast standard DV B- AS I (D igital V ideo B roadcasti ng AS ync hr onou s I nterface), MP EG (Mo vi ng P icture Ex orts Gr ou) system for transmitting the M PEG- 2TS (Tr ansport S tre am) Baketsuto standard in SONET / SDH transmission network has been considered. Further, as a method similar thereto, for example, a transmission method described in Patent Document 1.

Patent Document 1

JP-A 10- one hundred and ninety thousand seven hundred sixty-seven JP

The transmission Fomatsuto of DVB-AS I, since the MP EG- 2 TS packets in the method of transmitting at SO NE TZS DH transmission network, which can be transmitted by compressing about 1 up to television channels per 3. 75Mb ps, SONET / SDH receiving a maximum 72 ch receive port per DVB-aS I of the transmission device becomes available, it is possible to deliver to SONET / SD H network.

However, in this case, since the CATV station come to several hundred ch deliver MP EG- 2 TS Baketsuto of 3. 75M s respect DVB-AS I interface SONET SDH transmission device, DVB AS I interface number port comprising a receptacle into lifting one possible. However, all DVB AS I to receive port 3. 75MB ps of MPEG- 2TS packet 72 ch (3. 75Mb psx 72 ch = 270M bs, DVB- maximum reception data rate of the AS I = 27 OMb ps) is delivered rather it means that, DVB port with AS I interface can sometimes only a few ch component not delivered.

Usually, DVB AS when the maximum reception rate 27 OMB ps of I to allocate the bandwidth of the SONET / SDH network, allocates the SONET STS- 1-6 V (311. 04 Mb ps), the SDH STM 1 ( 311. 04Mbp s) are you assigned.

At this time, in order to put have allocated bandwidth to this port SONET / SDH transmission network as customer, STS- 1- 6 V (311. 04Mb ps) rather than ST S- 1-6 band less than V in should want to contract. To the force, a problem that there is no optimal way to operate assigned to flexible has been made in accordance with the customer request the bandwidth of the SONET / S DH.

Further, if, in the case where the MPEG- 2 TS packets targeted band SONET / SDH transmission device side of the CATV station could ¾ signal also, the receiving side from SONE TZ S DH signal, the MP EG- 2 TS packets when distributing removed, because it does not contain data Funorere bets, DVB AS I interface the output side DV B- AS I data rate for intended to adjust the (270 Mb ps), it requires some compensation process the case, there is a problem that its specific treatment method is not considered. Disclosure of the Invention

The present invention is directed to the generic object to «a signal distribution method and apparatus kills a production allocated flexibly fit the band of the synchronous network to the customer requirements.

To this end, the present invention is a transport bucket preparative television signals plurality of channels are multiplexed are supplied by transmission Fomatsuto digital broadcasting standard, the signal distribution method for transmitting at synchronous network delivery,

Wherein configuring the Hare by setting a transmission rate in a synchronous network according to the channel multiplexing number for each customer.

According to such a signal distribution method, it can be operated allocated to flexible reluctant to suit the bandwidth of the synchronous network to the customer requirements. Single DESCRIPTION OF THE DRAWINGS - Figure 1 is an example proc view of a conventional television signal distribution system. Figure 2 is a block diagram of another example of a conventional television signal distribution system. Figure 3 is a Proc view of another example of a conventional television signal Rooster 3 signal system. Figure 4 is a plot click view of one embodiment of a transmission system to which the signal distribution method of the present invention.

Figure 5 is a Proc view of one embodiment of a SONET / SDH transmission unit 5 3. Figure 6 is a diagram for explaining a case of mapping 'DVB ASI signals to STS 1-6 V.

Figure 7 is a diagram for explaining H 4 bytes of the multi-frame. Figure 8 is a diagram showing data STS 4 8.

Figure 9 is a diagram showing a structure of 4 lines parallel data STS 1 2.

Figure 1 0 is a diagram showing a format of DV B- ASI signal.

Figure 1 1 is a Proc diagram for explaining the transmission rate control according to the present invention. Figure 1 2 is a diagram showing a GFP frame format.

Figure 1 3 is a block diagram of one embodiment of SONE TZ SDH reception unit 5 5. Figure 1 4 is a Proc diagram for describing the output rate control in the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

It will be described below with reference to embodiments of the present invention with reference to the drawings.

Figure 4 shows a plot click view of one embodiment of a transmission system to which the signal distribution method of the present invention.

In the figure, a television signal received from Ddoendo station 5 0, for example Satellite of CATV is converted to a plurality of channels are multiplexed DVB AS I signal at I RT 51 1 customers DVB-AS I signal is supplied to the video switch 52 as. Also, the Bideosuitsuchi 52 is supplied with the DVB -AS I signals of the other customers, a plurality of customer selected in Bideosuitsuchi 52 DV B-AS I signal is a plurality of SONET / SDH transmission section 53 It is supplied to each input port.

Per one input port to the SONETZSDH transmission unit 53, and up to 72 channels (3. 75Mb ps X 72 channels = 270 Mb ps) multiplexing the MP EG- 2 TS Baketsuto high quality Terebiji ® emissions per one channel 3. 75MB ps DVB - supplied with AS I signal, SONET / SDH transmission section 53 instead of carrying the DVB AS I signal to SONETZSDH format, and sends the STS switching Te Gyotsu the optical transmission path 54.

Optical signal from the optical transmission line 54 is received by the S ONE T / SDH reception unit 55 of the local station are converted into DVB AS I signal after performing an STS switching. This signal is supplied to the video switch 及 Pi converter 56, selected DVB ASI signal is converted from M PEG-2 format to the television signal format, further 64 Q AM modulated with 64 Q AM modulated signal It is. 64 Q AM modulated signal is frequency-converted to radio frequency signals RF at the converter 57, the high frequency signal RF is delivered to each user is distributed to the plurality of systems at the distribution unit 58.

Figure 5 shows a block diagram of an embodiment of SONETZSDH transmission section 53. In the figure, the input port 60 ~ 60 m, respectively 3. MP EG- 2 signal 75MB ps and the maximum 72-channel multiplexed DVB AS I signal. Each DVB ASI signal is automatically waveform equalized by Twi 匕回 path 61 ~ 61 m, after being converted into the internal device from the received signal clock clock in the clock recovery circuit 6 2 ~ 62 m, the 8B 10B decoder 63 It is supplied.

8 B 10B decoder 63, the 10-bit code of each DVB AS I signal is converted into 8-bi Ttokodo, supplies to the transmission rate control unit 64 the transmission rate of the actual character data as a signal of up to 216Mb ps. The transmission rate control unit 64, for Matsupingu the control for the transmission rate of the signal line? /, The GFP frame while.

The SONET mapping unit 65, under a contract with the input port 6 (^ ~ 60 m customers that temple assigned to each of the GFP frame Mabbingu the input DVB ASI signals from each input port 6 Oi S Om Virtual Konkachine Shiyon by the path STS- 1_ 1 V, STS-1-3 V, STS- 1- 5 v, mapped to STS 1-6 V, further Chiyanenore first pass STS 48 indicating these 8 mapped to 48.

Here, a case will be described in which mapped to 27 of OMB ps DVB AS the I signal STS- 1 (52Mb ps) 6 present was used in the unit STS- 1-6 V (311Mb ps). As shown in FIG. 6, STS 1-6 V decomposing payload portion co every ram six to STS- 1 # 0~STS_1 # 5 of. Six STS- 1 # 0~STS- 1 # 5 respectively decomposed stores a sequence number for each column in the H 4 Paito in Pasuo within a bar head (POH). .

It will be described H 4 bytes during Maruchisuremu with reference to FIG. MF I (Mu lti F r ame I ndicator) is divided into low-order 4 bits of the MF I 1 and the upper 8 bits of the MF I 2, MF I 1 occupies bits 5-8 in the H4 byte, increments for each frame It is. MF I 2 is represented by a bit 1 to 4 in the case of MF I 1 = 0, 1. MF I 1 = 0 MSB of MF I 2 when, is when the MF I 1 = 1 indicates the LSB of the MF I 2. Also, 8-bit sequence number (SQ) is expressed in bits 1-4 when the MF I 1 = 14, 15. MSB when the sequence number of the MF I 1 = 14, when the MF I 1 = 15 indicates the L SB sequence number.

BWB interface 66 converts the 4 strains parallel data of each 8-bit parallel STS 12 shown in FIG. 9 a 32-bit parallel STS 48 to the data shown in FIG. 8, further, STS switch into serial data It supplies it to the 67. The numbers 1 to 48 in FIG. 8 and FIG. 9 shows the channel number.

Suitsuchingu data in STS switch 67 is transmitted from the transmitter 68 to the optical transmission path 54. In this case, the optical transmission line 54 is delivered at a transmission rate of STS- 48 (2488Mb ps).

Here, the input port 60 丄 ~ 60 m of SONET SDH transmission unit 53 from the video switch 52 of the head-end station 50 of the CATV, showing the Fomatsuto in FIG 10 (A) or FIG. 1 0 (B) DVB- AS I signal to deliver several hundred channels Kurutame, will have a SONET / SDH transmission portion 53 DVB aS I interface the number and port of the socket (S Oi G Om).

3 is a force, the input port 60 to 6 Om receive all DVB AS I signal. 75MB ps of MPEG- 2 signal 72 channels (27 OMb ps, DVB- maximum reception data rate of the AS I = 27 OMB ps) does not mean that the unit has been delivered, there is a case where there is an input port has not been only a few channels distribution.

Incidentally, DVB case of allocating the band of maximum reception rate 27 OMB s the 8B 1 OB Deco over de was then SONET networks AS I, and assigned to the STS 1-5 V. However, as the customer, V ヽ input Kapoto not been of channels divided by power distribution as described above SONET // bandwidth used for SDH transmission network is STS 1-5 in V rather name, STS 1 one 5 V less than e.g. STS 1-1 V is a helical you want to contract band (51. 84Mb ps) low cost, and the like.

In the present invention, S ONE T in Matsubingu unit 65, an input port 60 i to 60 m based on a contract with a customer allocated to, respectively therewith, the input port 6 Oi S Om or et input D VB- ASI since mapping the GFP frame Mabbingu signal path by a virtual concatenated Chillon STS 1 one 1 V, STS-l-3 v, STS- 1-5 V, in any of the STS-1- 6 V, can perform bandwidth allocation tailored to customer requirements, it is possible to effectively use the bandwidth of the S ONETZSDH transmission network.

Figure 1 1 shows a Proc view for explaining the transmission rate control according to the present invention. In the figure, each D VB- ASI signal with 8-bit code that will be supplied to the input port 60 1-6 per Om from 8B 10B decoder 63 is supplied to Baketsuto extractor I 1, extraction of the MPEG- 2TS packet If, extracts K 28. 5 space code for synchronizing the clock provided to delimit MPEG- 2TS packet is performed. Although all extracted MPEG- 2 TS Baketsuto is written to the first buffer 72, K28. 5 space code Installing are divided power when writing to the first buffer 72. However, when reading the superblock from the second buffer 74, since the clock synchronization in SONET / SDH reception unit 55 that faces, leaving the K28. 5 space code minimum 2 pi preparative between MPEG- 2TS packets. MPEG- 2TS Baketsuto read from the first buffer 72, as pretreatment before passing the GFP pine Bing portion 75 is at 64 BZ 65 B conversion portion 73 perform frame conversion 64BZ6 5 B. The frame of the converted department superblock and call.

This super block is written into the second buffer 74. It reads the super block of the second path Ffa 74 of each port in a round-robin fashion, to transfer the GFP Matsupi ring portion 75. The superblock supplied the GFP Matsubingu unit 75 maps the GFP frame Fomatsuto shown in FIG. At this time, the second buffer 74 of the port to be transferred, and notifies the SONET mapping unit 65 via the GFP mapping unit 75 to the state 3-bit signal T ADD,. SO response PTC from NET mapping unit 65 waiting for the a.

Here, when the bandwidth of been MPEG- 2TS Baketsuto input to a port bandwidth of SONE T side was higher, that is, if beyond the contracted bandwidth MGEP- 2TS packet signal is input, GFP mapping unit can not super plot click delivery to 75, so that the super-proc to the second buffer 74 is accumulated.

Therefore, the second buffer 74, the first threshold value is set in order to prohibit the writing of MP EG- 2 TS packets to the first buffer 72 if it exceeds a certain value capacity in advance second buffer are, performs disposal processing of the input data that exceeds the contract - band by prohibiting writing of first MPEG- 2 TS Baketsuto the buffer 72 when it exceeds the first threshold value.

Also, in the case of performing the disposal of MP EG- 2 TS packets in the first buffer 72, the inter-time has elapsed superblock is the output of the second buffer 74, if dropped in a volume until, again the first buffer 72 is a second threshold value (second threshold value Ku first threshold) is provided to allow the writing of MP EG- 2 TS packet to, for the first buffer 72 if it is lower than the second threshold value to allow the writing of MP EG- 2 TS packets Te.

By rate control together the flow of data of the thus input side (MPEG- 2 TS packets) to the band of the SON ET / SD H side, SONETZSD H transmission band more MP of EG- 2 TS Baketsuto input also been, it is possible to keep the rapidly MP EG- 2TS quality of the data transmit taking the protection of a certain period of time the waste in not a open ^^ of Baketsuto.

Figure 13 shows a block diagram of one embodiment of a SONET / SDH reception unit 55. In the figure, after a signal received from the optical transmission line 54 that is switched is supplied to the STS switch 82 by the transmission section 81, fourth BWB at interface 83 from the serial data of each 8-bit parallel as shown in FIG. 9 STS 12 is converted to the grid parallel data, and is further supplied to the SONET demapping unit 84 is converted into 32-bit parallel STS 48 to the data shown in FIG.

In SONET demapping unit 84 demaps the path STS 48 virtual concatenation Neshiyon path STS- 1- 1 v, STS- 1 one 3v, STS-l-5 v, respectively S TS- 1-6 V, further, to the output rate control unit 85 to Dematsupin grayed in GFP frame.

Here, the six STS- 1 # 0~STS- 1 # from 5 STS 1-6 V shown in FIG. 7, when the stand viewed 袓 was decomposed frames with the same MF I according sequence number from STS-1 STS- 1- assemble the 6 V. Of course, because the deviation of the arrival timing of the frame is a thread 且立 impossible when MF I gar eliminated occurs, has a buffer, the assembly work to store a plurality of frames therein. Performed Demabbingu the GFP frame the output rate control unit 85, and supplies the 8 B 10 B encoder 86 performs control of the output rate at the output port. 8B 10B encoder 86 to convert the 8-bit code at the output port units 10 Bittoko one de converts the MPEG- 2 signal to the maximum 72-channel-multiplexed DVB ASI signal.

Affairs DVB-AS I signal is sent from the output port 89 I~89m through cable drivers 87 ~87M 及 Pi amplifiers 88 E ~ 88m.

Figure 14 shows a Proc diagram for describing the output rate control in the present invention. In the figure, GFP frame outputted from the SONET demapping unit 84 is supplied to the GFP demapping unit 91 in the output rate control 85, it is de-mapped from the GFP frame to super Proc.

Demabbingu superblock are read in a round opening bottle method, it is supplied to the 64 B / 65 B conversion unit 92 provided for each output port 8 89 m. Is returned to its original MPEG- 2TS packet performs frame conversion 65B / 64 B of the 64B / 65 B conversion portion 92 in the superblock. Here, a minimum of two bytes between the obtained MP EG- 2 TS Baketsuto K28. 5 space code is entering a port.

Thereafter, in Baketsuto extraction unit 93 MPEG- 2TS Baketsuto is accumulated in the third bar Ffa 94 is extracted. The third buffer 94 accumulated MP EG- 2 TS packetized in Tsu TMG will read in parallel each output port from the 8B 10B encoder 86.

8 B 1 OB encoder 86 performs 8B 1 OB conversion read MP EG- 2 TS Baketsuto converted into 10-bit code outputs serially.

The transmission rate of the serial output for a 270 Mb ps, 8B 10B E encoder 86 embeds the K28. 5 space code for writing Align the transmission rate in the gap of the MP EG- 2 TS packet (actual data).

However, the transmission output clock after the 8B 10B encoder 86 is slightly higher than the subsequently received device-side clock Hayare, if, longer outputs the data bit by bit at the transmission side, the third buffer 94 of the preceding 8B 10B encoder 86 MPEG- 2TS packets come to the residence.

In this case, when the waiting third threshold value or more MPEG- 2TS packets reservoir in the third buffer 94, then written to MPEG- 2TS packets to be discarded. When having conducted the disposal of MPEG- 2 TS packet, when the time elapses third buffer

Came brush is MP EG- 2 TS packet 94, when the fourth threshold value accumulation (fourth threshold value Ku third threshold value) until MP EG- 2 TS packets is reduced, allow writing again MPEG- 2TS Baketsuto to.

Than the clock of the sender Conversely, the receiving clock is Hayare, case, for reading from the third buffer 9 within 4 MPEG- 2TS Baketsuto is eliminated, so that no gaps in the transmission data, the K28. 5 Space Code embedded by performing narrowing combined transmission rate, 含Ru in it to make the buffer § Cedar run force S does not occur.

Thus, DVB by the AS I signal child transmission mapped to mapped SONE T / SDH virtual concatenation Ne one Deployment of paths to the GFP frame from Ddoendo station to the local station of destination to CATV for it is possible to construct a system for transmitting between inexpensively by utilizing the existing SONET / SD H network. Further, by the path so as Harel according to required bandwidth of customer the DVB-AS I signal to SONETZSDH network, fine Rere service becomes possible Manako, the S ONE T / S DH network set to perform the combined rate control zone automatically, it becomes unnecessary complicated control, it is possible to reduce the burden of the control system for controlling the entire head-end station 50 of the CATV.

Incidentally, high-quality television signal can be compressed to 1 channel per 3. 75MB ps at M PEG-2, since the conventional television signal can be compressed up MP EG- 2 in 1 channel per 1.. 5 to 2 Mb ps, 1 obtained by multiplexing M? £ -2 Ding 3 packets per channel 1. 5~2Mb ps DVB- aS I signal may be configured to be supplied to the video switch 52.

In the above embodiment has been described SONET as an example, this can be carried out similarly even your Rere in SDH, synchronous network is a limited to SONET les.

The transmission rate control unit 64 corresponds to the transmission rate setting unit according to claim, 8 B 10B decoder 63 corresponds to the 8B 10B decoding unit, a packet extracting unit 71 corresponds to a space code deletion means, the first buffer 72 and the second buffer 74 corresponds to the packet discarding means, GFP mapping unit 75 corresponds to the GFP Matsupingu means, corresponding to the SONET mapping unit 65 is synchronous network mapping means, leaving Calais Ichito controller 85 output rate control correspond to the means, corresponding to the SONET demapping unit 84 is synchronous network demapping unit, GFP Dematsubingu portion 91 corresponds to the GFP Dematsu Bing means, 8B 10B encoder 86 corresponds to the 8B 10B encoding means.

Claims

The scope of the claims
TV 1 - more channels are multiplexed, the transport buckets DOO television signal is supplied by the transmission Fomatsuto digital broadcasting standard, the signal distribution method for transmitting at synchronous network delivery,
Signal distribution method for setting a transmission rate in the synchronous network according to the channel multiplexing number for each customer.
2. Claim 1, wherein the signal distribution method Niore Te,
It said transport buckets DOO is supplied by the transmission format DVB-ASI a MP EG- 2 TS Baketsuto, the synchronous network signal distribution method is S ON ET or S DH network. , '
In 3. Signal distribution method according to claim 2,
The MP EG- 2 TS Baketsuto signal distribution method for sending delete the scan Bae one Sukodo other than the predetermined pie betting amount of space codes to the synchronous network between.
4. In the signal distribution method according to claim 1,
When the transport buckets preparative supplied to each of the customer exceeds the transmission rate of the synchronous network that is set according to the channel multiplexing number for each of the customer, the signal distribution method of discarding transport packet supplied.
5. Multiple channels transport packets of multiplexed television signal is supplied by the transmission Fomatsuto digital broadcasting standard, the transmission device for transmitting a synchronous network,
Transmitting device having a heat transmission rate setting unit sets the transmission rate of the synchronous network according to the channel multiplexing number for each customer. -
6. Transmitting apparatus Nio according to claim 5, wherein Te, the transport buckets DOO is supplied at MPEG- 2TS is Baketsuto transmission format DVB-AS I, feeding said synchronous network is a SONET or SDH network signal apparatus.
7. The transmitter as claimed in claim 6, wherein,
ffrt transmitting apparatus having 8 B 10 B decoding means for performing 8 B 10B decoding of the signal supplied by his own transmission Fomatsuto DVB-AS I.
8. Te Ore, the transmission apparatus according to claim 6,
Transmitting device having a space code deletion means for deleting scan Bae one Sukodo non-space code a predetermined number of bytes between the MP EG- 2 TS packets.
9. The transmitter as claimed in claim 5 or 8, wherein,
When the transport buckets preparative supplied to each of the customer exceeds the transmission rate of the synchronous network that is set according to the channel multiplexing number for each of the customers, transmission with Baketsuto discarding means for discarding the transport buckets preparative supplied apparatus.
10. The transmitter of claim 9,
Transmitting device having a GFP Mabbingu means for mapping the transport buckets preparative supplied to the GFP frame.
11. The transmitter of claim 10, wherein,
Transmitting apparatus having a synchronous network Mabbingu means the GFP frame according to the channel multiplexing number for each customer mapped to different paths capacity by virtual concatenation Ne Shiyon sent to the SONET or SD H network.
12. There the receiving device the transport bucket preparative multiple channels multiplexed Te revision signal transmission Fomatsuto digital broadcast standard receives the signal and transfer transmission rate corresponding to the channel number multiple of each customer from the synchronous network Te, the receiving apparatus having the output rate control means for controlling the write Nde output rate fills the space code between the transport buckets that picked from the received signal.
13. The receiving device according to claim 12, wherein,
'5 wherein the transmission Fomatsuto transport buckets metropolitan MP EG- 2 TS Baketsuto is DVB AS I, the synchronous network receiving apparatus is SONET or SDH network
14. The receiving device according to claim 13, wherein,
10 receiving apparatus having a synchronous network demapping means for Demappin grayed paths received in the GFP frame from the SONE T or SDH network.
15. The receiving device according to claim 14, wherein,
Receiver including a GFP 15 Demabbingu means for Demabbingu the GFP frame to the transport packet.
16. The receiving device according to claim 15, wherein,
Receiver including an 8B 1 OB encoding means for converting the transmission Four mat DVB AS I performed 8B 10B encoding of the transport bucket and. . 0
PCT/JP2003/014521 2003-11-14 2003-11-14 Method and system for delivering signal WO2005048494A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002344446A (en) * 2001-05-14 2002-11-29 Nec Corp Line band management method for trunk network system transmitter
JP2003188843A (en) * 2001-12-18 2003-07-04 Nec Corp Multiplex transmission method and multiplexer/ demultiplexer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002344446A (en) * 2001-05-14 2002-11-29 Nec Corp Line band management method for trunk network system transmitter
JP2003188843A (en) * 2001-12-18 2003-07-04 Nec Corp Multiplex transmission method and multiplexer/ demultiplexer

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