CN202035115U

CN202035115U - Three networks integration implementing device allowing IPQAM to move down to light station

Info

Publication number: CN202035115U
Application number: CN2011201731932U
Authority: CN
Inventors: 杨云宾; 应展烽
Original assignee: SUZHOU JINNA INFORMATION TECHNOLOGY Co Ltd
Current assignee: SUZHOU JINNA INFORMATION TECHNOLOGY Co Ltd
Priority date: 2011-05-27
Filing date: 2011-05-27
Publication date: 2011-11-09
Anticipated expiration: 2021-05-27

Abstract

The utility model relates to a three network integration implementing device allowing an IPQAM (Quadrature Amplitude Modulator) to move down to a light station, in particular to an IPQAM implementing device provided with a dynamic programmable circuit. To solve the problem that the conventional IPQAM has expensive price and can not move down to the position of the light station for fully utilizing the frequency resources of the coaxial cable, the three network integration implementing device provided by the utility model mainly comprises a processor, an FPGA (Field Programmable Gate Array) or a dynamic programmable chip, a D/A converter, an amplifier, a mixer, a feedback sampling circuit and an A/D converter.

Description

Move down the integration of three networks implement device of IPQAM to the light station

One, technical field

The utility model relates to the integration of three networks implement device of a kind of IPQAM of moving down to the light station, particularly a kind of IPQAM implement device that drives the attitude programmable circuit.

Two, background technology

Utilize CDN and IPQAM technology on hfc plant, to realize video request program, digitized revolution has been brought the variation of HFC, the dual fusion of medium and network has proposed new challenge will thoroughly changing existing radio data system structure and operation mode from now on to the broadcasting and TV transmission network.What now built consensus is to adopt IP technology and optical fiber transmission technique to build broadcasting and TV broadband backbone network on backbone.Content distributing network CDN increases the new network architecture of one deck in the backbone network of existing broadcasting and TV broadband, special service is in application content, application content is published to the distant network " edge " that " jumps " only arranged from the user, thereby improve the service quality and the user experience of application content, it is congested to alleviate network bandwidth anxiety and network egress, and then enlarges the customer group of network application content provider.IPQAM technology rapid development and universal making are popularized in an all-round way based on the business model of HFC+IP network on the other hand.

IPQAM modulating equipment collection " multiplexing, scrambling, modulation, frequency translation " function is an one, and it in the multiplexing again multi-service transport stream in appointment of program stream of IP backbone input, carries out QAM modulation and frequency translation with DVB/IP again, output RF.After using IPQAM, the control information between STB and the CDN edge video server is transmitted by different paths respectively with video flowing: flow processs such as the access authentication of STB, EPG information browse are mutual by two-way return path; CDN edge video server exports audio/video flow to IPQAM equipment with appropriate package form after receiving user's request, and IPQAM is transferred to STB by hfc plant after audio/video flow is modulated to the RF signal, and STB carries out the demodulation sign indicating number to audio/video flow.In the video on-demand system of HFC, the video content of user institute program request is descending by the hfc plant carrying, by IPQAM equipment the modulation of IP packet is sent in the hfc plant.

After Route Selection and resource allocation, the edge video server of CDN will be to IPQAM with UDP packaged type output video flow data, after the IPQAM decapsulation a plurality of SPTS are multiplexed into MPTS, be transferred to the transmission characteristic of STB by hfc plant, need to consider suitable data package and Rate Control according to IPQAM equipment.At present the video code model of main flow has MPEG-2, MPEG-4, H.264.It is as follows that the package that the MPEG2 file is play unpacks flow process: (1) file is deposited (2) video server with the file format of MPEG2 and is read file data and be packaged into the TS packet mode, adds TCP/IP packet header, sends to IPQAM equipment by IP network; (3) I PQAM takes out the TS data and is modulated into the RF signal and transmits by hfc plant; (4) STB receives after the TS data its broadcast of decoding.MPEG4/H264 package flow process is play package based on the MPEG4/H264 file of real time streaming transport protocol RTSP transmission, and to unpack flow process as follows: (1) file is deposited with the MPEG4/H264 file format; (2) video server reads file, is packaged into the RTP form earlier, adds the packet header of TS then, adds TCP/IP packet header, sends to IPQAM by IP network; (3) IPQAM takes out the TS data and is modulated into the RF signal and transmits by hfc plant; (4) after the .DVB decoding chip receives the TS data, the TS header data is removed, with the Payload information of TS just the RTP data passes give MPEG4/H.264 decoder (5) MPEG4/H.264 decoder to the RTP processing data information, to the audio, video data broadcast of decoding.

Three, summary of the invention

The problem that solves: for solving the problem of existing IPQAM equipment price costliness, and IPQAM can be moved down into the light station location, so that make full use of the frequency resource of coaxial cable.

Technical scheme:

Ethernet signal (101); (1) can be the ethernet signal that the ONU of EPON sends from OLT; (2) can be the ethernet signal that the ONU of GEPON sends from OLT; (3) can be the ethernet signal that switch sends; (4) can be the ethernet signal that router sends; Ethernet signal is a two-way signaling, comprising: the control signal of IPQAM equipment, the supervisory signal of IPQAM equipment, and the video stream signal that issues of IPQAM;

IPQAM equipment (102) receives the ethernet signal that sends over from ethernet signal (101), the operating state of IPQAM is provided with, and IPQAM is managed; Receive the Ethernet video flowing that ethernet signal (101) sends over simultaneously, be converted to the relevant position of corresponding channel and corresponding transport stream, vision signal is sent on the channel of cable TV correspondence by blender (104) according to the requirement of video flowing;

Blender (104), IPQAM modulated television signal that IPQAM equipment (102) is brought and cable TV signal (103) are delivered on the cable tv coax (105) after mixing;

Cable tv coax (105), can directly connect the user, also cable tv coax (105) signal can be transferred to and be converted to HFC optical mode analog signal after the cable tv coax signal is modulated through light signal, by optical fiber its signal is sent to far-end, be converted to the cable TV electric analoging signal again by the light station, use for the cable TV subscriber.

Ethernet (201); Flush bonding processor (202) is handled the Ethernet data bag, and the IPQAM control signal is converted to control command, to the relevant register assignment, thereby realizes control, is that the Ethernet data bag is given FPGA or dynamically programmable chip (204); FPGA or dynamically programmable chip (204): video Ethernet data bag is carried out; The interface that connects flush bonding processor and FPGA or dynamically programmable chip (203): interface can be a pci interface, also can be PCI Express interface, parallel port or SPI interface; D/A conversion chip (209) will be modulated to the QAM analog signal through FPGA or dynamically programmable chip (204), send to amplifier (210); Amplifier (210) amplifies the QAM signal of modulating, and makes signal reach the level of 105-110dBuV, makes signal can transmit certain distance on coaxial cable; Frequency mixer (207) mixes QAM signal and the cable TV signal that modulates, and simultaneously feedback signal is sent to feedback sampling circuit (206); Frequency mixer (207) is delivered to the signal mixing of cable TV signal and QAM modulation on the cable tv coax (208), be sent to cable TV subscriber's terminal, for number TV set-top box or intelligent digital video on demand TV programme or time-moving television playing programs; Feedback sampling circuit (206) with the feedback signal that samples after A/D conversion chip (205) conversion, send to FPGA or dynamically programmable chip (204), FPGA or dynamically programmable chip (204) are according to the size of the feedback signal that receives, thereby regulate the size that FPGA or dynamically programmable chip (204) send to D/A conversion chip (209) signal, thereby realize FEEDBACK CONTROL signal.

Beneficial effect: use and move down the integration of three networks implement device of IPQAM, reduce the IPQAM cost greatly, be convenient to realize moving down of IPQAM simultaneously, can make full use of the frequency resource of coaxial cable to the light station.

Four, description of drawings

Fig. 1 IPQAM signal is coupled to schematic diagram in the catv line

Fig. 2 IPQAM theory of constitution schematic diagram

Five, embodiment

Below in conjunction with accompanying drawing embodiments of the present invention are described in detail:

Preferred embodiment 1:

Be illustrated in figure 1 as the IPQAM signal and be coupled to schematic diagram in the catv line,

101 is ethernet signal; (1) can be the ethernet signal that the ONU of EPON sends from OLT; (2) can be the ethernet signal that the ONU of GEPON sends from OLT; (3) can be the ethernet signal that switch sends; (4) can be the ethernet signal that router sends; Ethernet signal is a two-way signaling, comprising: the control signal of IPQAM equipment, the supervisory signal of IPQAM equipment, and the video stream signal that issues of IPQAM;

102 is IPQAM equipment, receives from 101 ethernet signals that send over, and the operating state of IPQAM is provided with, and IPQAM is managed; Receive the 101 Ethernet video flowings that send over simultaneously, be transformed into the relevant position of corresponding channel and corresponding transport stream, vision signal is sent on the channel of cable TV correspondence by 104 blenders according to the requirement of video flowing;

104 is blender, after 102 IPQAM modulated television signals of bringing and the mixing of 103 cable TV signals, delivers on 105 cable tv coaxs;

105 is cable tv coax, can directly connect the user, be converted to HFC optical mode analog signal after also the cable tv coax mixed signal can being modulated through light signal, by optical fiber its signal is sent to far-end, be converted to the cable TV electric analoging signal again by the light station, use for the cable TV subscriber.

Ethernet signal (101): (1) can be the ethernet signal that the ONU of EPON sends from OLT; (2) can be the ethernet signal that the ONU of GEPON sends from OLT; (3) can be the ethernet signal that switch sends; (4) can be the ethernet signal that router sends; Ethernet signal is a two-way signaling, comprising: the control signal of IPQAM equipment, the supervisory signal of IPQAM equipment, and the video stream signal that issues of IPQAM;

Preferred embodiment 2:

As shown in Figure 2, Ethernet (201); Flush bonding processor (202) is handled the Ethernet data bag, and the IPQAM control signal is converted to control command, to the relevant register assignment, thereby realizes control, is that the Ethernet data bag is given FPGA or dynamically programmable chip (203); FPGA or dynamically programmable chip (204): video Ethernet data bag is carried out; Connect flush bonding processor and FPGA or dynamically programmable chip (203): interface can be a pci interface, also can be PCI Expres s interface, parallel port or SPI interface; D/A conversion chip (209) will be modulated to the QAM analog signal through FPGA or dynamically programmable chip (204), send to amplifier (210); Amplifier (210) amplifies the QAM signal of modulating, and makes signal reach the level of 105-110dBuV, makes signal can transmit certain distance on coaxial cable; Frequency mixer (207) mixes QAM signal and the cable TV signal that modulates, and simultaneously feedback signal is sent to feedback sampling circuit (206); Frequency mixer (207) is delivered to the signal mixing of cable TV signal and QAM modulation on the cable tv coax (208), be sent to cable TV subscriber's terminal, for number TV set-top box or intelligent digital video on demand TV programme or time-moving television playing programs; Feedback sampling circuit (206) with the feedback signal that samples after A/D conversion chip (205) conversion, send to FPGA or dynamically programmable chip (204), FPGA or dynamically programmable chip (204) are according to the size of the feedback signal that receives, thereby regulate the size that FPGA or dynamically programmable chip (204) send to D/A conversion chip (209) signal, thereby realize FEEDBACK CONTROL signal.

Though in conjunction with the accompanying drawings embodiments of the present invention are described, those of ordinary skills can make various distortion or modification within the scope of the appended claims.

Claims

1. move down the integration of three networks implement device of IPQAM, it is characterized in that to the light station:

Ethernet signal (101): can be the ethernet signal that the ONU of EPON sends from OLT; It can be the ethernet signal that the ONU of GEPON sends from OLT; It can be the ethernet signal that switch sends; It can be the ethernet signal that router sends; Ethernet signal is a two-way signaling, comprising: the control signal of IPQAM equipment, the supervisory signal of IPQAM equipment, and the video stream signal that issues of IPQAM;

2. according to the described integration of three networks implement device that moves down IPQAM to the light station of claim 1, it is characterized in that:

Ethernet (201); Flush bonding processor (202) is handled the Ethernet data bag, and the IPQAM control signal is converted to control command, to the relevant register assignment, thereby realizes control, is that the Ethernet data bag is given FPGA or dynamically programmable chip (203); FPGA or dynamically programmable chip (204): video Ethernet data bag is carried out; Connect flush bonding processor and FPGA or dynamically programmable chip (203): interface can be a pci interface, also can be PCI Express interface, parallel port or SPI interface; D/A conversion chip (209) will be modulated to the QAM analog signal through FPGA or dynamically programmable chip (204), send to amplifier (210); Amplifier (210) amplifies the QAM signal of modulating, and makes signal reach the level of 105-110dBuV, makes signal can transmit certain distance on coaxial cable; Frequency mixer (207) mixes QAM signal and the cable TV signal that modulates, and simultaneously feedback signal is sent to feedback sampling circuit (206); Frequency mixer (207) is delivered to the signal mixing of cable TV signal and QAM modulation on the cable tv coax (208), be sent to cable TV subscriber's terminal, for number TV set-top box or intelligent digital video on demand TV programme or time-moving television playing programs; Feedback sampling circuit (206) with the feedback signal that samples after A/D conversion chip (205) conversion, send to FPGA or dynamically programmable chip (204), FPGA or dynamically programmable chip (204) are according to the size of the feedback signal that receives, thereby regulate the size that FPGA or dynamically programmable chip (204) send to D/A conversion chip (209) signal, thereby realize FEEDBACK CONTROL signal.