CN103607580A - High-definition video stream-based transmission method - Google Patents
High-definition video stream-based transmission method Download PDFInfo
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- CN103607580A CN103607580A CN201310477911.9A CN201310477911A CN103607580A CN 103607580 A CN103607580 A CN 103607580A CN 201310477911 A CN201310477911 A CN 201310477911A CN 103607580 A CN103607580 A CN 103607580A
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Abstract
The invention discloses a high-definition video stream-based transmission method. The objective of the invention is to improve existing video stream transmission rate. The high-definition video stream-based transmission method of the invention comprises the following steps that: video streams are transmitted through an optical fiber; video streams acquired by a high-definition camera are transmitted to a switch through adopting an encapsulation transmission protocol; and the switch outputs video stream information to value storage equipment/and analysis equipment.
Description
Technical field
The present invention relates to network transmission protocol field, be specifically related to a kind of transmission method based on high definition video steaming.
Background technology
Along with the high speed development of computer technology, data communication technology, various business and Military Application are more and more higher to the requirement of the collection of multimedia messages and transmission.The HD-SDI real-time high-definition video technology for example in recent years occurring in security protection industry, adopts the coaxial transmission means of tradition to make transmission range become bottleneck (only can support less than 100 meters); Due to the exhaustive exploitation of natural resources, cost one tunnel of the metals such as copper is high in addition, adopts cheap transmission medium also to become inexorable trend.As can be seen here, to transfer of data, particularly to demands such as the real-time of audio video transmission, reliability, large bandwidth, low cost, environmental protection, will be increasingly urgent.
Summary of the invention
For the problems referred to above, the invention provides that a kind of low delay, large bandwidth, two-forty, antijamming capability are strong, long transmission distance, a kind of transmission method based on high definition video steaming that loss is few.
For achieving the above object, a kind of transmission method based on high definition video steaming of the present invention, described video flowing transmits by optical fiber, described method comprises and adopts video streaming that encapsulated delivery agreement gathers high-definition camera to switch, described switch by described Video stream information output valve memory device or/and analytical equipment.
Further, described encapsulated delivery agreement comprises: physical layer, the physical characteristic of defining interface and medium; Coding layer; Protocol layer, has at least defined composition form, primitive sequence protocol, port type, the COS of information unit, the registration and unregistration of Segmentation and Reassembly, flow control, mistake recovery policy, node initializing and the node of data.
Further, the topological structure of described tunneling comprises point-to-point structure, arbitration ring network structure and exchange networking structure.
Especially, described coding layer adopts 8/10B coding, 16/20B coding.
Especially, described optical fiber is monomode fiber or is dual mode optical fiber.
Further, the composition form of described information unit comprises frame, sequence, exchange.
Further, the frame of described tunneling definition is comprised of SOF, content frame and EOF tri-parts, and wherein said content frame comprises frame head, data field and CRC.
A kind of transmission method based on high definition video steaming of the present invention, adopts coaxial cable with the transmission of traditional HD video, and expensive and distance is short comparing very, and the present invention adopts Optical Fiber Transmission, with low cost and transmission range is limited hardly;
The present invention adopts based on video format transmission of video and out of Memory, is different from tradition based on communications video, so bandwidth and transmission of video efficiency aspect promote greatly;
The present invention, outside supporting the interface protocol of existing traditional high definition, has promoted the definition of high definition resolution, has expanded high definition resolution specification;
The invention solves IP network high definition product in places not fully up to expectations such as encoding and decoding loss, hangover, frame losings.The problem such as loss, hangover is mainly relevant with the coding criterion of transmission medium and agreement.It is medium that the present invention adopts optical fiber, has promoted transmitting physical medium.
Accompanying drawing explanation
Fig. 1 is the protocol hierarchy structural representation of a kind of transmission method based on high definition video steaming of the present invention;
Fig. 2 is the point-to-point networking structure schematic diagram of a kind of transmission method based on high definition video steaming of the present invention;
Fig. 3 is the arbitration ring network structure schematic diagram of a kind of transmission method based on high definition video steaming of the present invention;
Fig. 4 is the exchange networking structure schematic diagram of a kind of transmission method based on high definition video steaming of the present invention.
Fig. 5 is the transmission of video structural representation based on SMPTE of a kind of transmission method based on high definition video steaming of the present invention.
Fig. 6 is the data structure schematic diagram of the frame protocol (FI frame) of a kind of transmission method based on high definition video steaming of the present invention.
Fig. 7 is the video-data fragment structural representation of a kind of transmission method based on high definition video steaming of the present invention.
Fig. 8 is the ancillary data structural representation of a kind of transmission method based on high definition video steaming of the present invention.
Fig. 9 is the audio data section structural representation of a kind of transmission method based on high definition video steaming of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
The transmission method of the present embodiment based on high definition video steaming, described video flowing transmits by optical fiber, and described optical fiber is monomode fiber or is dual mode optical fiber, in short-distance transmission, can use coaxial cable and coaxial twisted-pair feeder.Described method comprises and adopts video streaming that encapsulated delivery agreement HDFDI gathers high-definition camera to switch, described switch by described Video stream information output valve memory device or/and analytical equipment.
Further, as shown in Figure 1, described encapsulated delivery agreement comprises: physical layer, the physical characteristic of defining interface and medium; Coding layer; Protocol layer, has at least defined composition form, primitive sequence protocol, port type, the COS of information unit, the registration and unregistration of Segmentation and Reassembly, flow control, mistake recovery policy, node initializing and the node of data; Described coding layer adopts 8/10B coding, 16/20B coding.。
As shown in Figures 2 to 4, the topological structure of described tunneling comprises point-to-point structure, arbitration ring network structure and exchange networking structure.
As shown in Figure 5, the transmission of video of the present embodiment based on SMPTE
EAV: effective video finishes;
SAV: effective video starts;
Active Video: during transmission effective video, the value of F, V, H is 0.
All business, except video, all leave in BLANK.
As shown in Figure 6, the data structure of frame protocol (FI frame).
L1, L2, L3, L4, synchronization frame data length and Non-alignment Frame data length are different and different according to the form of the video of transmission, and the sequential of the definition video of itself and SMTTP is basically identical, for 1080P30fps, and the total line number 1125 of a frame.Wherein 1st～45 line positions are in digital frame blanking zone; 46～1125 line positions, in digital frame effective video district, are counted 1080 row; Synchronization frame data length is 2112 to the maximum, and the extreme length of Non-alignment Frame data is 256.After 6 IDLE of the full row of every numeral, all can send synchronization frame data and send Non-alignment Frame data at digital line blank.If have video, audio frequency or ancillary data to need transmission, frame data length is not 0 so, otherwise its data length is 0.
| Symbol | Definition | Numeral row sequence number |
| L1 | Every frame the |
1 |
| L2 | Last column of digital frame blanking | 45 |
| L3 | The first row of effective video | 46 |
| L4 | Last column of |
1125 |
FI frame signal is described below shown in table:
DEV_ID(4Bytes)
| Device type | Value (high 4bits) | Value (low 28bits) |
| SDI?Camera | 0000 | 28’bXXXX_XXXX_XXXX_XXXX_XXXX_XXXX_XXXX |
| DVR | 0100 | 28’bXXXX_XXXX_XXXX_XXXX_XXXX_XXXX_XXXX |
TYPE(2Bytes)
HDFDI agreement itself combines optical-fibre channel technology and SMPTE technology, so preferentially support access and the transmission of high resolution audio and video.
Agreement is divided into three speed class at present, 270Mbps, 1.485Gbps and 2.97Gbps, well compatibility and the SD-SDI that has supported current security protection industry, the video of any resolution in HD-SDI and 3G-SDI standard.
In addition, protocol extension is extremely strong, is not limited to the maximum video 1080P of current security protection industry, for the support of follow-up more high-resolution high definition real-time video leaves surplus.
As shown in Figure 7, video-data fragment.
As shown in Figure 8, ancillary data.
As shown in Figure 9, audio data section.
HDFDI agreement is Optical Fiber Transmission, the networking control protocol of domestic first and unique independent design, can be applicable to large-scale security protection group network system.The HDFDI agreement that various smooth products pass through is carried out networking, by platform software unified management, diversity and complexity for network topology structure have good adaptability, can be widely used in intelligent high definition security protection video monitoring equipment field, and can expand to other communications industry.
HDFDI agreement is supported three kinds of basic networkings: point-to-point, arbitration looped network and exchange networking.By these three kinds of networking technologys, can expand to multiple networking mode flexibly, to adapt to different video monitoring environment.
HDFDI agreement mainly comprises following 5 class services:
1 class service: point-to-point private line access;
2 class services: transmit mutually data between a plurality of nodes, support multiplexed, multicast communication, be similar to the switching technologies such as frame interruption;
3 class services: similar 2 class services, the just not responsible transmitting terminal of replying of receiving terminal;
4 class services: virtual link, through switch, realize point to point connect;
5 class services: the connected mode that realizes Flow Control through switch.
HDFDI has stipulated transmission rate: 270Mbps, 1.485Gbps, the transmission rate that 2.97Gbps etc. are higher.
A kind of transmission method based on high definition video steaming of the present invention, adopts coaxial cable with the transmission of traditional HD video, and expensive and distance is short comparing very, and the present invention adopts Optical Fiber Transmission, with low cost and transmission range is limited hardly;
The present invention adopts based on video format transmission of video and out of Memory, is different from tradition based on communications video, so bandwidth and transmission of video efficiency aspect promote greatly;
The present invention, outside supporting the interface protocol of existing traditional high definition, has promoted the definition of high definition resolution, has expanded high definition resolution specification;
The invention solves IP network high definition product in places not fully up to expectations such as encoding and decoding loss, hangover, frame losings.The problem such as loss, hangover is mainly relevant with the coding criterion of transmission medium and agreement.It is medium that the present invention adopts optical fiber, has promoted transmitting physical medium.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claim was defined.
Claims (7)
1. the transmission method based on high definition video steaming, it is characterized in that, described video flowing transmits by optical fiber, described method comprises and adopts video streaming that encapsulated delivery agreement gathers high-definition camera to switch, described switch by described Video stream information output valve memory device or/and analytical equipment.
2. the transmission method based on high definition video steaming according to claim 1, is characterized in that: described encapsulated delivery agreement comprises: physical layer, the physical characteristic of defining interface and medium; Coding layer; Protocol layer, has at least defined composition form, primitive sequence protocol, port type, the COS of information unit, the registration and unregistration of Segmentation and Reassembly, flow control, mistake recovery policy, node initializing and the node of data.
3. the transmission method based on high definition video steaming according to claim 1, is characterized in that: the topological structure of described tunneling comprises point-to-point structure, arbitration ring network structure and exchange networking structure.
4. the transmission method based on high definition video steaming according to claim 1, is characterized in that: described coding layer adopts 8/10B coding, 16/20B coding.
5. the transmission method based on high definition video steaming according to claim 1, is characterized in that: described optical fiber is monomode fiber or is dual mode optical fiber.
6. the transmission method based on high definition video steaming according to claim 2, is characterized in that: the composition form of described information unit comprises frame, sequence, exchange.
7. the transmission method based on high definition video steaming according to claim 1, is characterized in that: the frame of described tunneling definition is comprised of SOF, content frame and EOF tri-parts, and wherein said content frame comprises frame head, data field and CRC.
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| CN201310477911.9A CN103607580A (en) | 2013-10-14 | 2013-10-14 | High-definition video stream-based transmission method |
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| CN201310477911.9A CN103607580A (en) | 2013-10-14 | 2013-10-14 | High-definition video stream-based transmission method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060601A (en) * | 2006-04-17 | 2007-10-24 | 索尼株式会社 | Recording and reproducing apparatus and reproducing apparatus |
| CN202524511U (en) * | 2012-04-28 | 2012-11-07 | 北京九鼎通信设备有限公司 | Optical-fiber network transmission device for high-definition videos |
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2013
- 2013-10-14 CN CN201310477911.9A patent/CN103607580A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060601A (en) * | 2006-04-17 | 2007-10-24 | 索尼株式会社 | Recording and reproducing apparatus and reproducing apparatus |
| CN202524511U (en) * | 2012-04-28 | 2012-11-07 | 北京九鼎通信设备有限公司 | Optical-fiber network transmission device for high-definition videos |
Non-Patent Citations (2)
| Title |
|---|
| 有点小小笨: ""旗瀚国内首家发布HDFDI技术 定义高清传输新标准"", 《来自网络-ITBBS.PCONLINE.COM.CN/TV/50416048.HTML》 * |
| 蔡叶芳等: ""基于SOPC的FC-2层协议设计与实现"", 《计算机技术与发展》 * |
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Address after: 518000 Guangdong city of Shenzhen province Futian District Shennan Road and the agricultural road at the junction of the northeast side of the Times Technology Building 20 floor, room 2009 Applicant after: QIHAN TECHNOLOGY CO., LTD. Address before: 518000 Guangdong city of Shenzhen province Futian District Shennan Road and the agricultural road at the junction of the northeast side of the Times Technology Building 20 floor, room 2009 Applicant before: Qihan Technology Co., Ltd. |
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Application publication date: 20140226 |