CN102572585B - Method and system for high speed and parallel data reception and processing - Google Patents
Method and system for high speed and parallel data reception and processing Download PDFInfo
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- CN102572585B CN102572585B CN 201110251548 CN201110251548A CN102572585B CN 102572585 B CN102572585 B CN 102572585B CN 201110251548 CN201110251548 CN 201110251548 CN 201110251548 A CN201110251548 A CN 201110251548A CN 102572585 B CN102572585 B CN 102572585B
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Abstract
The invention provides a method and a system for high speed and parallel data reception and processing. The method is used to deal with high speed data downloading of edge equipment of a broadcast television bidirectional network system at an embedded terminal. The method comprises the followings steps that: (1), an integration channel server carries out encapsulation on data input into the integration channel server according to types as well as the encapsulated data are split into N parts and the split N parts of data are sent in parallel to an IP quadrature amplitude modulator (IPQAM) through a plurality of UDPs, wherein N is larger than or equal to 2; (2), the IPQAM simultaneously sends multipath data in parallel to a user terminal platform respectively at a plurality of frequency point by coaxial cables; (3), the terminal platform uses a multi-high frequency tuner radio frequency signal receiving plate to receive multipath parallel radio frequency data and the received radio frequency data are stored in a buffer zone of the terminal platform; (4), the terminal platform carries out demultiplexing on the received data in the buffer zone as well as the data that have been processed by the demultiplexing are transmitted to a data processing module from the buffer zone; and (5), the data processing module completes splicing of downlink data or corresponding processing and datasent by a sending terminal are restored. Specifically, the integration channel server is arranged between streaming server equipment and the IPQAM equipment.
Description
Technical field
The present invention relates to field of embedded technology, relate in particular in the digital television system, the built-in terminal platform is specifically related to the method and system of a kind of high-speed parallel receive data and processing by coaxial cable.
Background technology
Along with the propelling of national integration of three networks strategy is implemented, based on the interactive TV business of two-way cable TV network also at development, user's dependence for the Internet on TV platform increases to some extent, thereby terminal platform is also more and more higher for the demand of data downstream speed.Nowadays, access downstream rate deficiency has become the problem that digital television business develops required solution, also is one of principal element that affects user's experience.
For the digital TV terminal platform, if adopt the IP network access way, for 4M ADSL broadband, downstream rate only has 4Mbps, and the mode of the ADSL2+ that adopts still at test phase accesses, and downstream rate also only can be stabilized in about 8Mbps.Yet the live broadcast service of high definition interactive TV adopts the MPEG-2 coded format usually, and code check is greatly about 20-25Mbps.Adopt H.264 coding, code check is also about 7Mbps.Based on existing network infrastructure, adopt IPQAM equipment can reach very high data access speed.
IPQAM (IP Quadrature Amplitude Modulator) is a kind of edge modulation equipment, is generally used for the bidirectional rebuilding of cable television network.IPQAM can pass through the data flow of IP input again to carry out QAM modulation and frequency translation in the multiplexing program stream formulating again, and the output radiofrequency signal sends to the user terminal platform by coaxial cable.
Coaxial cable also is the transmission channel commonly used in the digital television system, and channel capacity is larger, and early investment is little.Adopt the 64QAM modulation system, the single channel downstream rate reaches as high as 38Mbps, and the network security performance is high, and QoS is secure.
Yet, in the face of the professional development of making rapid progress of interactive TV, and the user is to the potential demand of magnanimity high-speed downloads business, (namely at present main employing is that one road code stream is downloaded by IPQAM to adopt existing single channel technology, come frequency locking in terminal by single TUNER, carry out data receiver by master chip after the demodulation) downstream rate still be difficult to satisfy the quick-downloading demand of high definition film.The structure of the marginal portion of the network of prior art radio and television Two-way is shown in Fig. 1-a.Wherein IPQAM belongs to the edge device of Two-way network, but the defective that this network exists at present is: regional user's terminal downloads speed is lower, therefore be difficult to satisfy the quick-downloading of the big data quantity such as high definition film, period of reservation of number is longer, and the user experiences relatively poor.
Therefore, experience for improving man-machine interaction, the speed of terminal (such as set-top box) receiving network data still needs larger room for promotion.
Summary of the invention
The object of the invention is to, for overcoming the inadequate problem of the bandwidth from the edge device to the user terminal in the prior art, thereby provide the method and system of a kind of high-speed parallel receive data and processing.
For achieving the above object, the invention provides the method for a kind of high-speed parallel receive data and processing, the method is used for realizing the edge device of radio and television Two-way network system to the high-speed data download of built-in terminal, and described method comprises following steps:
1) merge Channel server and will input its inner data and encapsulate, and the Data Division after will encapsulating is N part, walking abreast by a plurality of udp ports is sent to IPQAM equipment, wherein N 〉=2; Wherein, except the ts program can not split (directly enter the ts program of player, terminal generally be can't see buffer), also can be split/assembly unit by the up video flowing of Microsoft Loopback Adapter through merging Channel server ccgw, packaged type may be ts/udp, ts/rtp/udp etc.
2) IPQAM equipment walks abreast multichannel data simultaneously at a plurality of frequencies respectively by coaxial cable and is sent to the user terminal platform;
3) the built-in terminal platform receives the rf data of multidiameter delay by many tuners radiofrequency signal dash receiver, and leaves in the buffering area of terminal platform;
4) the built-in terminal platform passes through demultiplexing to the data that receive in buffering area, and then the data behind the demultiplexing are transferred to data processing module from buffer area; 5) data processing module is finished splicing or the respective handling of downlink data, goes back the data that original sender sends; Wherein, described fusion Channel server input links to each other with the output of fluidisation server apparatus, and its output links to each other with the input of IPQAM.
In the technique scheme, the data type of described input is private data, may be the file (concerning merging Channel server, it is private data that the data that all udp/ip enter all can be considered, and comprises audio frequency and video) of video flowing, audio stream or other types; Data encapsulation adopts multi-protocol encapsulation, wherein merges the function that Channel server does not directly push away video, and these videos are all issued by fluidisation server (HFC or media server).The descending process of video flowing: the fluidisation server seals into udp with video and is dealt into the fusion Channel server, merges Channel server and again data is at first sealed into mpe, seals the TS bag again and seals into more at last one deck udp, is dealt into IPQAM equipment.The encapsulation flow process of described private data comprises following steps: step 201, merge Channel server to from HFC light station or EPON input its inner private data and adopt multi-protocol encapsulation mode to encapsulate; Step 202 merges Channel server according to the staggered mode of bag sequence number, is N part with the Data Division after the encapsulation, wherein behind the Data Division, to each partial data, also need cut apart MPE PDU, with its load as the TS packet, to realize the transmission on coaxial cable; N 〉=2 wherein; Step 203 is 1 UDP message bag with 1-7 TS packet encapsulation, and multichannel data UDP bag is sent to IPQAM by the IP network high-speed parallel.
The packet head of described multi-protocol encapsulation comprises: packet ID sign, current data packet sequence number, final data bag sequence number, data packet length and CRC check field.
In the technique scheme, described step 2 further comprises following steps:
Step 301, IPQAM equipment are carried out decapsulation by inner mapping table to a plurality of UDP bags, solution is separated by decantation to the SPTS code stream, SPTS stream is multiplexed into MPTS MPTS, and the IPQAM PID that remaps again generates program combination table pat table and Program Map Table PMT;
Step 302, IPQAM equipment carries out respectively the QAM modulation to multiplex data stream, and multiplex data stream is modulated to respectively on a plurality of frequencies, and the radio frequency rf signal on a plurality of frequencies of modulation is exported by coaxial cable, the parallel user terminal platform that is issued to.
In the technique scheme, described step 4 further comprises following steps:
Step 501-1, through demultiplexing, from through parsing the data flow relevant information the program combination table PAT that upgrades and the Program Map Table PMT, this relevant information comprises program number and pid information;
Step 501-2 extracts and analyzes Program Specific Information, finds all program numbers and the corresponding PMT PID of each program number according to the Section structure of program combination table PAT;
Step 501-3, respectively each program is proceeded as follows: the Section that obtains corresponding program number in the pmt table according to the PMT PID of this program, structure according to PMT Section is analyzed, and then finds the Basic Flow pid value of all these programs to preserve;
Step 501-4, multichannel is transferred to a plurality of independently PID filter buffer memorys concurrently through the data flow of demultiplexing from buffer area, prepare to filter.
Optionally, when terminal platform is the Broadcom7405 platform, the second-level model that described step 501-4 adopts table to filter, namely when filtering PSI/SI, system assigns a single filter PID channel, and distributes simultaneously cascade filtration DMA channel; Each DMA channel all comprises some filtering rules, only meets the data of filtering rule, could be sent to cascade filtration by single filter, and finally is cached in DMA message buffer; The object that the first order is filtered is PID; The object that filter the second level is 12 bytes of head of MPE Section.
The system of a kind of high-speed parallel receive data and processing also is provided based on said method the present invention, comprise GuangDian Center's machine room, broadcasting and TV headend room, HFC fiber optic network, HFC light station or EPON, IPQAM equipment, coaxial cable and somely belong to regional user, it is characterized in that, described system also arranges an edge equipment and merges Channel server, be used for RTP, UDP or IP bag, be encapsulated into the MPE bag, then send to IPQAM according to the DVB standard, and should merge Channel server between fluidisation server apparatus and IPQAM equipment; Described IPQAM equipment walks abreast multichannel data simultaneously at a plurality of frequencies respectively by coaxial cable and is sent to the user terminal platform; Described user terminal also comprises the reception of the radiofrequency signal of tuner more than a dash receiver, a demultiplexing unit and a splicing processing unit; Wherein, described many tuners radiofrequency signal dash receiver receives and is used for receiving simultaneously the multichannel data that IPQAM equipment sends; Described demultiplexing unit is used for the interested single-unit order stream of Polymera TS stream MPTS is filtered by PID such as audio frequency and video, obtains the data flow of this program; Described concatenation unit is used for according to corresponding Data Division principle data flow being spliced assembling accordingly.
In the technique scheme, the method for packing of describing in the encapsulation flow process of described private data such as the method provided by the invention.Described IPQAM with multichannel data respectively in a plurality of frequencies step of describing in method provided by the invention of the parallel step that is sent to the user terminal platform simultaneously.The step of described demultiplexing is also as the step of the demultiplexing of describing in the method provided by the invention.
Compared with prior art, advantage of the present invention is:
The present invention has increased the fusion Channel server that links to each other with edge device IPQAM, a kind of method of the high speed receive data bag for the system after improving also is provided, thereby provide a kind of method of built-in terminal system high-speed downlink data receiving stream, to solve the now problem of downstream rate deficiency.The whole downstream rate that improves of the present invention comprises from sending front end and receiving terminal.This shows, this patent has provided a kind of method of downloading based on the parallel high-speed data of IPQAM, can greatly improve the downstream rate of data, and Effective Raise interactive TV service-user is experienced.
Description of drawings
Fig. 1-a is the structural representation of network of the radio and television Two-way of prior art;
Fig. 1-b is the structural representation of the network of radio and television Two-way of the present invention;
Fig. 2-a is the packet schematic diagram that obtains that encapsulates based on the MPE mode of the present invention;
Fig. 2-b is the workflow schematic diagram of system of the present invention;
Fig. 2-c is that fusion Channel server of the present invention is to the encapsulation flow chart of private data;
Fig. 3 fusion Channel server of the present invention issues data to terminal platform;
Fig. 4 terminal platform front end of the present invention is from multifrequency point downlink data receiving flow chart;
Fig. 5 terminal platform Data Analysis of the present invention flow chart;
Fig. 6 secondary table filtering model of the present invention schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and concrete execution mode content of the present invention is described in further detail.
The invention provides a kind of method and system for built-in terminal high speed downlink data receiving stream.A kind of built-in terminal system high-speed parallel receive data and method of processing of realizing that the present invention proposes realizes that the required system of the method comprises: merge Channel server, IPQAM and user terminal.The process that realizes is to merge Channel server downlink data is encapsulated as packet, and packet is split as a plurality of parts, by the parallel IPQAM that is sent to of IP network.IPQAM is sent to user terminal with packet by a plurality of frequencies.On user terminal, by configuring many tuners radiofrequency signal dash receiver, on a plurality of frequencies with the multiplex data stream parallel receive to Installed System Memory.Data flow is delivered in the data parser and is resolved through demultiplexing, and through the packet splicing, recovers original downlink data.Adopt this kind method, the built-in terminal platform can the high-speed downloads data.The present invention proposes a kind of built-in terminal system that realizes from the method for coaxial cable high-speed downloads data, be applicable to various high definition business and Large Volume Data service downloading.
Shown in Fig. 1-b, this figure is the structural representation of the network of radio and television Two-way of the present invention, itself and prior art the network difference that forms structure be after server, to have accessed before the IPQAM equipment fusion Channel server.
Shown in accompanying drawing 2-b, this figure is the embedded system high-speed parallel packet receiving processing method based on IPQAM that the present invention proposes, and the method that described high-speed parallel packet receiving is processed specifically comprises following steps:
For the private data handling process be: Acceleration of starting issues flow process, and this acceleration issues flow process and further comprises following steps, with reference to figure 2-c.
The present invention adopts the form of MPE mode encapsulated data packet specifically shown in Fig. 2-a.Described MPE packaged type is formed by the expansion of the DSM-CC segmentation private data in the DVB standard.When the value of segmentation table type identification (Table_id) was 0x3E, what expression was carried out was data broadcast service (this is to stipulate in the MPE standard).The verification that has increased capsule header and afterbody and after, form protocol Data Unit (PDU, Protocol Data Unit).MPEPDU head expense is 12 bytes.
Owing to not identifying the field of load type in the MPE head, being defaulted as the IPv4 agreement; If make it support the IPv6 agreement, LLC_SNAP_flag (this is to stipulate in the MPE standard) field need be set.
Step 203 is 1 UDP message bag with 1-7 TS packet encapsulation.Multichannel data UDP bag is sent to IPQAM by the IP network high-speed parallel.
Step 301, IPQAM carries out decapsulation by inner mapping table to a plurality of UDP bags, and solution is separated by decantation to the SPTS code stream, can be multiplexed into MPTS MPTS to SPTS stream, and the IPQAM PID that can remap generates program combination table PAT and Program Map Table PMT.
Step 302, IPQAM carries out respectively the QAM modulation to multiplex data stream, and multiplex data stream is modulated to respectively on a plurality of frequencies, and radio frequency rf signal is exported by coaxial cable, by the parallel user terminal platform that is issued to of multi-frequency point data.The system that issues data realizes block architecture diagram as shown in Figure 3.
Based on the system board on the user terminal platform of prior art, the present invention has also configured many tuners radiofrequency signal dash receiver, has reached the driver module that is used for supporting this many tuners radiofrequency signal dash receiver for the multi-path parallel signal on the multifrequency point that receives the IPQAM transmission; Described many tuners radiofrequency signal dash receiver receives the parallel multichannel data that sends of IPQAM.Existing system board is communicated by letter via total line traffic control with many tuners radiofrequency signal dash receiver of the present invention, is used for realizing that system board sends operational orders such as setting mode of operation, locking frequency point and reading and writing data to many tuners radiofrequency signal dash receiver.After the driver normal operation through transplanting, the parallel signal that the demodulation of many tuners radiofrequency signal dash receiver receives, the data flow after the demodulation is delivered to terminal system platform buffer memory from many tuners radiofrequency signal dash receiver again.The application of many tuners radiofrequency signal dash receiver has shielded the otherness of terminal platform, makes the present invention can extensively be adapted to all kinds of terminal platforms that different vendor provides.
A plurality of transfer of data frequencies of this terminal are mail in the terminal platform locking, enter next step.
The flow process that Data Analysis of the present invention is processed as shown in Figure 5, idiographic flow is as described below:
Step 501, the data flow behind the multi-channel demodulator enters into the buffer area (DMABuffer) of terminal platform from many tuners radiofrequency signal dash receiver, is handled as follows again.
Step 501-1 is through demultiplexing, from through parsing the data flow relevant information the PAT that upgrades and the PMT, such as information such as program number and PID.
Step 501-2, (PSI) extracts and analyzes to Program Specific Information.Section structure according to PAT finds all program numbers and the corresponding PMT PID of each program number;
Step 501-3, respectively each program is proceeded as follows: the Section that obtains corresponding program number in the pmt table according to the PMT PID of this program, structure according to PMT Section is analyzed, and then finds the Basic Flow pid value of all these programs to preserve.
Step 501-4, multichannel is transferred to a plurality of independently PID filter buffer memorys concurrently through the data flow of demultiplexing from buffer area, prepare to filter.
Step 502, data flow flow to the buffer area of data processing module from the buffer area of a plurality of independently PID filters.
In addition, corresponding to the multiplex data stream that IPQAM sends simultaneously, terminal platform of the present invention also need to open with multiplex data stream respectively corresponding, possess many groups of appropriate filtercondition independently filters, be used for filtering simultaneously multiplex data stream.
Analytic method, process of analysis that the platform of various terminal architecture provides are not quite similar, and need different platform to realize respectively according to s own situation.
Optionally, for the Broadcom7405 platform, the second-level model that the present invention has adopted table to filter.Namely when filtering PSI/SI, system assigns a PID channel (single filter), and distributes simultaneously DMA channel (cascade filtration).Each DMA channel all comprises some filtering rules, only meets the data of filtering rule, could be sent to cascade filtration by single filter, and finally is cached in DMA message buffer.The object that the first order is filtered is PID.The object that filter the second level is 12 bytes of head of MPE Section, actual general table_id, MAC_address or the reserved field of adopting.Filter type is, according to coef, mask and excl word for word mate, and the table_id field is included among the coef.In theory, 128 of maximum supports, i.e. 16 bytes are filtered in the second level.The field implication that filter the second level is as follows:
Coef: the concrete numerical digit that needs coupling;
Mask: on the mask number of significant digit (0 is effective), when all data=coef, data are received;
Excl: on the excl number of significant digit (0 is effective), when all data=coef, data are abandoned;
Meet the data flow of filtercondition by PID filter and secondary filter, enter the buffer area of data processing module.The cascade filtration working method as shown in Figure 6.
Step 503, data flow is removed from a plurality of data processing module buffer areas, carries out the processing of corresponding splicing.
The internal memory that terminal platform of the present invention also needs to open up the 512K size from heap space is processed buffer area as data, and optional the present invention adopts the mode of buffer circle (Ring Buffer) to carry out buffer memory.Because concurrency and the relative independentability of multichannel data, terminal platform should adopt the mode resolution data of multithreading: according to the difference of data type, a plurality of threads are processed multichannel data simultaneously.
In order to take full advantage of the usefulness of Broadcom7405 platform dual core processor, the present invention arranges separately CPU compatibility (affinity) for each data processing threads, to improve cpu busy percentage.
The possible situation of the data type that terminal platform need be resolved has following several:
If the video flowing that a certain circuit-switched data need to be play for the user is then delivered to this circuit-switched data decoder (Decoder) and is play.
If the video flowing that a certain circuit-switched data need to be recorded for the user is then delivered to this circuit-switched data register (Recorder) and is carried out real-time stream-recording.
If wherein a circuit-switched data such as the file of video flowing, audio stream or other types, is then delivered to this circuit-switched data inner parsing of data parser (Message) for the private data that the user downloads.Through parsing module, remove stem and the afterbody of TS packet, and the load of TS packet is taken out, be assemblied into complete MPE section data.
If descending multichannel data system is through merging Channel server some parts that split, same private data section, then multichannel data is delivered to simultaneously among a plurality of DMA Message buffer, carried out simultaneously Data Analysis by a plurality of parsings (Message) module.Through resolving (Message) module, extract MPE section data and be sent to a plurality of independently data processing buffering areas.
Then, based on the staggered characteristics of MPE section numeric order, data processing module is according to MPE section sequence number, and interlocking from a plurality of data processing buffering areas extracts MPE Section, finishes the assembly unit of N partial data by sequence number.
Step 504, the terminal data process of analysis finishes, and upper level applications can be used original downlink data.
The built-in terminal platform adopts technical scheme of the present invention to carry out data high-speed and receives, and under the 64QAM modulating mode, the downstream rate from the fusion Channel server to user terminal is more than the twice of former downstream rate.So, break through the original single channel of coaxial cable, the flank speed 38Mbps restriction of prior art, alleviated the bottleneck from IPQAM equipment to the downstream rate deficiency the user terminal in the high definition interactive service, significantly promoted user's experience.
Adopt the IPQAM connecting coaxial cable, data parallel sends, and can realize that data high-speed is descending.Under the 64QAM modulation system, the highest downstream rate reaches 50-152Mbps, and speed is comparatively steady, is not subjected to the IP network environmental interference.
In a word, the technical solution used in the present invention is as follows: the required system's part of this implementation method comprises, merges Channel server, IPQAM and user terminal.Merge Channel server be used for carrying out downlink data transmission and with the Signalling exchange of terminal platform.The concrete steps of downlink data transmission comprise:
When a) enabling the high-speed downstream mode, merging Channel server need to encapsulate downlink data in multi-protocol encapsulation (MPE) mode, and the packet after will encapsulate is split as N partly (N 〉=2), and walking abreast by a plurality of udp ports is sent to IPQAM;
B) IPQAM receives multichannel data from a plurality of udp ports, data is modulated respectively, and on N frequency (N 〉=2), transfer data to terminal platform through coaxial cable;
C) on built-in terminal, adopt many tuners radiofrequency signal dash receiver downlink data receiving, with the otherness of shield terminal platform, can be widely used in the built-in terminal platform that different vendor provides.
D) on a plurality of frequencies with the multichannel data parallel receive to Installed System Memory, and according to the bag sequence number of multi-protocol encapsulation packet, finish the splicing of downlink data.For realizing receiving simultaneously multichannel data, terminal platform adopts the mode of multithreading to carry out the parsing of data.The employing of multithreading needs the data processing module of terminal platform operating system and SDK for the support of reenterability.For the embedded platform of configuration polycaryon processor (Symmetrical Multi-Processing Kernel), adopt the mode of multithreading especially can improve cpu busy percentage.
Based on user terminal of the present invention, for providing higher user, the terminal use experiences, can satisfy the demand of multiple digital television business and fused business.
Above implementing regulations are only in order to illustrate that technical scheme of the present invention is not intended to limit, and on using, can extend to other modification, variation, application and embodiment, think that simultaneously all such modifications, variation, application, embodiment are within the scope of the invention.
Claims (12)
1. the method for a high-speed parallel receive data and processing, the method is used for realizing the edge device of radio and television Two-way network system to the high-speed data download of built-in terminal, described method comprises following steps:
1) merge Channel server and will input its inner data and encapsulate, and the Data Division after will encapsulating is N part, walking abreast by a plurality of udp ports is sent to IPQAM equipment, wherein N 〉=2;
2) IPQAM walks abreast multichannel data simultaneously at a plurality of frequencies respectively by coaxial cable and is sent to the user terminal platform;
3) the built-in terminal platform receives the rf data of multidiameter delay by many tuners radiofrequency signal dash receiver, and leaves in the buffering area of terminal platform;
4) the built-in terminal platform passes through demultiplexing to the data that receive in buffering area, and then the data behind the demultiplexing are transferred to data processing module from buffer area;
5) data processing module is finished splicing or the respective handling of downlink data, goes back the data that original sender sends;
Wherein, described fusion Channel server input links to each other with the output of fluidisation server apparatus, and its output links to each other with the input of IPQAM.
2. the method for high-speed parallel receive data according to claim 1 and processing is characterized in that, the data that Channel server inside is merged in input are private data, and described private data adopts multi-protocol encapsulation.
3. the method for high-speed parallel receive data according to claim 2 and processing is characterized in that, the encapsulation flow process of described private data comprises following steps:
Step 201 merges Channel server and adopts the multi-protocol encapsulation mode to encapsulate to input its inner private data from the fluidisation server;
Step 202 merges Channel server according to the staggered mode of bag sequence number, is N part with the Data Division after the encapsulation, wherein behind the Data Division, to each partial data, also need cut apart MPE PDU, with its load as the TS packet, to realize the transmission on coaxial cable; N 〉=2 wherein;
Step 203 is 1 UDP message bag with 1-7 TS packet encapsulation, and multichannel data UDP bag is sent to IPQAM by the IP network high-speed parallel.
4. according to claim 2 or the method for 3 described high-speed parallel receive datas and processing, it is characterized in that, the packet head of described multi-protocol encapsulation comprises: packet ID sign, current data packet sequence number, final data bag sequence number, data packet length and CRC check field.
5. according to claim 1, the method for 2 or 3 described high-speed parallel receive datas and processing, it is characterized in that, described step 2 further comprises following steps:
Step 301, IPQAM equipment are carried out decapsulation by inner mapping table to a plurality of UDP bags, and solution is separated by decantation to the SPTS code stream, and SPTS stream is multiplexed into MPTS MPTS, and the PID that remaps, and generates program combination table pat table and Program Map Table PMT;
Step 302, IPQAM equipment carries out respectively the QAM modulation to multiplex data stream, and multiplex data stream is modulated to respectively on a plurality of frequencies, and the radio frequency rf signal on a plurality of frequencies of modulation is exported by coaxial cable, the parallel user terminal platform that is issued to.
6. the method for high-speed parallel receive data according to claim 1 and processing is characterized in that, described step 4 further comprises following steps:
Step 501-1, through demultiplexing, from through parsing the data flow relevant information the program combination table PAT that upgrades and the Program Map Table PMT, this relevant information comprises program number and pid information;
Step 501-2 extracts and analyzes Program Specific Information, finds all program numbers and the corresponding PMT PID of each program number according to the Section structure of program combination table PAT;
Step 501-3, respectively each program is proceeded as follows: the Section that obtains corresponding program number in the pmt table according to the PMT PID of this program, structure according to PMT Section is analyzed, and then finds the Basic Flow pid value of all these programs to preserve;
Step 501-4, multichannel is transferred to a plurality of independently PID filter buffer memorys concurrently through the data flow of demultiplexing from buffer area, prepare to filter.
7. the method for high-speed parallel receive data according to claim 5 and processing is characterized in that, described step 4 further comprises following steps:
Step 501-1, through demultiplexing, from through parsing the data flow relevant information the program combination table PAT that upgrades and the Program Map Table PMT, this relevant information comprises program number and pid information;
Step 501-2 extracts and analyzes Program Specific Information, finds all program numbers and the corresponding PMT PID of each program number according to the Section structure of program combination table PAT;
Step 501-3, respectively each program is proceeded as follows: the Section that obtains corresponding program number in the pmt table according to the PMT PID of this program, structure according to PMT Section is analyzed, and then finds the Basic Flow pid value of all these programs to preserve;
Step 501-4, multichannel is transferred to a plurality of independently PID filter buffer memorys concurrently through the data flow of demultiplexing from buffer area, prepare to filter.
8. the method for high-speed parallel receive data according to claim 6 and processing, it is characterized in that, when terminal platform is the Broadcom7405 platform, the second-level model that described step 501-4 adopts table to filter, namely when filtering PSI/SI, system assigns a single filter PID channel, and distributes simultaneously cascade filtration DMA channel; Each DMA channel all comprises some filtering rules, only meets the data of filtering rule, could be sent to cascade filtration by single filter, and finally is cached in DMA message buffer; The object that the first order is filtered is PID; The object that filter the second level is 12 bytes of head of MPE Section.
9. the system of a high-speed parallel receive data and processing, comprise GuangDian Center's machine room, broadcasting and TV headend room, HFC fiber optic network, HFC light station or EPON, IPQAM equipment, coaxial cable and somely belong to regional user, it is characterized in that, described system also arranges edge device and merges Channel server, this equipment is used for inputting its inner RTP, UDP or the IP bag is encapsulated as the MPE bag, then sends to coupled IPQAM equipment according to the DVB standard;
Described IPQAM equipment walks abreast multichannel data simultaneously at a plurality of frequencies respectively by coaxial cable and is sent to the user terminal platform;
Described user terminal also comprises the radiofrequency signal of tuner more than a dash receiver, a demultiplexing unit and a splicing processing unit;
Wherein, described many tuners radiofrequency signal dash receiver is used for receiving simultaneously the multichannel data that IPQAM equipment sends; Described demultiplexing unit is used for the interested single-unit order stream of Polymera TS stream MPTS is filtered by PID such as audio frequency and video, obtains the data flow of this program; Described splicing processing unit is used for according to corresponding Data Division principle data flow being spliced assembling accordingly.
10. the system of high-speed parallel receive data according to claim 9 and processing is characterized in that, the encapsulation flow process of private data comprises following steps:
Step 201, merge Channel server to from HFC light station or EPON input its inner private data and adopt multi-protocol encapsulation mode to encapsulate;
Step 202 merges Channel server according to the staggered mode of bag sequence number, is N part with the Data Division after the encapsulation, wherein behind the Data Division, to each partial data, also need cut apart MPE PDU, with its load as the TS packet, to realize the transmission on coaxial cable; N 〉=2 wherein;
Step 203 is 1 UDP message bag with 1-7 TS packet encapsulation, and multichannel data UDP bag is sent to IPQAM equipment by the IP network high-speed parallel.
11. the system of high-speed parallel receive data according to claim 9 and processing is characterized in that, described IPQAM equipment with multichannel data respectively a plurality of frequencies simultaneously the parallel step that is sent to the user terminal platform further comprise:
Step 301, IPQAM equipment are carried out decapsulation by inner mapping table to a plurality of UDP bags, and solution is separated by decantation to the SPTS code stream, and SPTS stream is multiplexed into MPTS MPTS, and the IPQAM PID that remaps again generates program combination table PAT and Program Map Table PMT;
Step 302, IPQAM equipment carries out respectively the QAM modulation to multiplex data stream, and multiplex data stream is modulated to respectively on a plurality of frequencies, and the radio frequency rf signal on a plurality of frequencies of modulation is exported by coaxial cable, the parallel user terminal platform that is issued to.
12. the system of high-speed parallel receive data according to claim 9 and processing is characterized in that, the step of described demultiplexing further comprises following steps:
Step 501-1, through demultiplexing, from through parsing the data flow relevant information the PAT that upgrades and the PMT, this relevant information comprises program number and pid information;
Step 501-2 extracts and analyzes Program Specific Information, finds all program numbers and the corresponding PMT PID of each program number according to the Section structure of PAT;
Step 501-3, respectively each program is proceeded as follows: the Section that obtains corresponding program number in the pmt table according to the PMT PID of this program, structure according to PMT Section is analyzed, and then finds the Basic Flow pid value of all these programs to preserve;
Step 501-4, multichannel is transferred to a plurality of independently PID filter buffer memorys concurrently through the data flow of demultiplexing from buffer area, prepare to filter.
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| CN103905147B (en) * | 2012-12-28 | 2017-03-22 | 联芯科技有限公司 | Data processing method, sending device, receiving device and communication system |
| CN103916375B (en) * | 2013-01-09 | 2016-12-28 | 中国科学院声学研究所 | The encapsulation of hfc plant downlink data multichannel and transmission method |
| CN103970690A (en) * | 2014-05-19 | 2014-08-06 | 浪潮电子信息产业股份有限公司 | High-performance high-fault-tolerance storage design method and device based on channel bonding |
| CN105072047B (en) * | 2015-09-22 | 2018-12-07 | 浪潮(北京)电子信息产业有限公司 | A kind of message transmissions and processing method |
| CN108235108A (en) * | 2018-03-20 | 2018-06-29 | 青岛海信电器股份有限公司 | A kind of PVR method for recording, system and television set |
| CN108683951B (en) * | 2018-05-11 | 2021-08-03 | 广州珠江数码集团股份有限公司 | Video data transmission method, device and system |
| CN108648386B (en) * | 2018-07-02 | 2020-10-20 | 张家港市鸿嘉数字科技有限公司 | Intelligent household anti-theft monitoring system and working method thereof |
| CN109151497B (en) * | 2018-08-06 | 2021-09-21 | 广州虎牙信息科技有限公司 | Live wheat-connecting method and device, electronic equipment and storage medium |
| CN109218760B (en) * | 2018-10-19 | 2021-04-02 | 广州珠江数码集团股份有限公司 | Method and device for modulating large-code-rate program |
| CN111326176A (en) * | 2018-12-14 | 2020-06-23 | 中移（杭州）信息技术有限公司 | Detection method, device and medium of RTP packet based on OPUS coding |
| CN111181938A (en) * | 2019-12-20 | 2020-05-19 | 北京交通大学 | Edge calculation distributed data encryption transmission method based on fragment transmission |
| CN114040172B (en) * | 2021-11-22 | 2024-04-12 | 富盛科技股份有限公司 | Vehicle bayonet data fusion transmission method and system based on video monitoring system |
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