【摘要】：伴隨著電視節(jié)目制作向高清化轉型,重復播出的大碼率電視劇素材和宣傳片占據(jù)了播出服務器寶貴的存儲空間,因此,如何在節(jié)目媒資系統(tǒng)及視頻服務器間建立成本相對較低并且易于管理的二級存儲系統(tǒng)是目前網(wǎng)絡化電視播出系統(tǒng)中急需要研究并解決的。在上一代標清電視播出系統(tǒng)中,我們使用光纖交換機為核心構建了播出網(wǎng)絡。該系統(tǒng)運行中存在與以太網(wǎng)及其他異構系統(tǒng)兼容性較差的問題,造成播出平臺內的存儲系統(tǒng)無法和平臺外的服務器實現(xiàn)數(shù)據(jù)共享,存儲的節(jié)目素材無法被其他播控平臺再利用。本文的研究目標是設計出一套能夠克服上述缺點,并且符合網(wǎng)絡化高清電視播控平臺需求的網(wǎng)絡存儲系統(tǒng)。在網(wǎng)絡化電視播出新系統(tǒng)的總體設計方面,主要采用了千兆以太網(wǎng)絡和分級存儲的方式。根據(jù)這一系統(tǒng)應用模式,本文通過分析,預估了新視覺高清二級存儲系統(tǒng)的磁盤容量和網(wǎng)絡帶寬要求�？紤]到播出平臺將采用全硬盤的無帶化播出方式,新系統(tǒng)中同時取消了灌錄系統(tǒng)和自動控制網(wǎng)絡。遷移系統(tǒng)在標清電視播出系統(tǒng)中承擔了存儲系統(tǒng)元數(shù)據(jù)以及節(jié)目內容采集的任務,存在任務多且業(yè)務流程不合理的問題。在新的網(wǎng)絡化電視播控平臺中,去除了灌錄系統(tǒng),添加了遷移策略服務器和編單工作站,對元數(shù)據(jù)和節(jié)目素材進行統(tǒng)一的管理。同時,對遷移系統(tǒng)的業(yè)務流程作了重新設計,添加了節(jié)目素材回遷功能,并優(yōu)化了節(jié)目單接口服務器的工作流程。在存儲硬件設備方面,一、采用磁盤柜取代了分散式的存儲服務器,將所有磁盤集中至2個磁盤柜中,每個磁盤柜配置一塊熱備盤,同時配置兩個存儲控制器。二、采用大容量光纖磁盤取代了原先的SCSI磁盤。三、添加兩臺文件服務器和磁盤整列連接,采用集群文件系統(tǒng)管理,通過網(wǎng)絡文件系統(tǒng)和視頻服務器以及媒資系統(tǒng)實現(xiàn)數(shù)據(jù)共享。四、取消了光纖交換機,直接以存儲控制器連接文件服務器和磁盤陣列,消除了總線或交換機方式造成的延遲。五、取消了元數(shù)據(jù)服務器,以文件服務器代替元數(shù)據(jù)服務器,元數(shù)據(jù)和節(jié)目數(shù)據(jù)共享數(shù)據(jù)通道,進一步精簡了硬件結構。在新視覺高清二級存儲系統(tǒng)的實現(xiàn)過程中,本文還設計了兩個測試方案,對建成后二級存儲系統(tǒng)進行了性能測試,以確保新系統(tǒng)符合設計要求。最后,我們實現(xiàn)了二級存儲系統(tǒng)的數(shù)據(jù)共享以及節(jié)目素材自媒資系統(tǒng)經(jīng)由二級存儲系統(tǒng)至播出視頻服務器的自動遷移,簡化了二級存儲系統(tǒng)架構,使播出系統(tǒng)更具開放性和靈活性。所設計的網(wǎng)絡播出系統(tǒng)已應用于新視覺高清電視播出系統(tǒng)中,該系統(tǒng)自2012年12月投入使用以來運行穩(wěn)定,播出質量得到了廣大觀眾的一致認可。
[Abstract]:Along with the television program production to the high-definition transition, the repeat broadcast of the large code rate TV series material and propaganda occupied the broadcast server valuable storage space, therefore, How to establish a relatively low cost and easy to manage secondary storage system between program media system and video server is an urgent need to be studied and solved in the network television broadcast system. In the previous generation of SDTV broadcasting system, we constructed the broadcast network with optical fiber switch as the core. The system has poor compatibility with Ethernet and other heterogeneous systems, which results in the storage system in the broadcast platform can not share data with the server outside the platform, and the stored program material can not be reused by other broadcast control platforms. The research goal of this paper is to design a network storage system which can overcome the above shortcomings and meet the needs of networked HDTV broadcast control platform. In the overall design of the new network TV broadcasting system, gigabit Ethernet network and hierarchical storage are mainly used. According to the application mode of this system, this paper estimates the disk capacity and network bandwidth requirements of the new visual high-definition secondary storage system through analysis. Considering that the broadcast platform will adopt the full hard disk without tape broadcast mode, both the recording system and the automatic control network have been cancelled in the new system. The migration system undertakes the task of storing metadata and collecting program contents in the standard and clear TV broadcasting system. There are many tasks and unreasonable business processes. In the new networked TV broadcasting and control platform, the recording system is removed, the migration strategy server and single workstation are added, and the metadata and program material are managed uniformly. At the same time, the business process of the migration system is redesigned, the program material returning function is added, and the workflow of the program interface server is optimized. In the aspect of storage hardware, first, the disk cabinet is used to replace the distributed storage server, all the disks are centralized into two disk cabinets, each disk cabinet is equipped with a hot standby disk and two storage controllers are configured at the same time. Second, the SCSI disk was replaced by a large-capacity fiber-optic disk. Third, add two file servers and disk whole column connection, adopt cluster file system management, realize data sharing through network file system, video server and media system. Fourth, the optical fiber switch is cancelled, and the file server and disk array are connected directly with the storage controller, which eliminates the delay caused by bus or switch mode. Fifth, the metadata server is abolished, the metadata server is replaced by the file server, and the metadata and program data sharing data channels are shared, which further simplifies the hardware structure. In the course of the realization of the new vision high definition secondary storage system, two test schemes are designed, and the performance of the secondary storage system after completion is tested to ensure that the new system meets the design requirements. Finally, we realize the data sharing of the secondary storage system and the automatic migration of the program material self-financing system from the secondary storage system to the broadcast video server, which simplifies the secondary storage system architecture. Make the broadcast system more open and flexible. The network broadcast system has been applied to the new visual HDTV broadcasting system. The system has been running steadily since it was put into use in December 2012, and the broadcast quality has been unanimously recognized by the majority of viewers.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN948.13

【參考文獻】

相關期刊論文 前3條

1 謝長生,陳寧,萬繼光;統(tǒng)一存儲網(wǎng)數(shù)據(jù)遷移系統(tǒng)的設計與實現(xiàn)[J];華中科技大學學報(自然科學版);2005年04期

2 黎泳;;分級存儲在電視臺的應用[J];現(xiàn)代電視技術;2006年12期

3 宣艷;馬晨陽;;基于FC和千兆以太網(wǎng)的存儲區(qū)域網(wǎng)在衛(wèi)星收錄網(wǎng)中的應用[J];有線電視技術;2009年04期

相關博士學位論文 前1條

1 向東;iSCSI-SAN網(wǎng)絡異構存儲系統(tǒng)管理策略的研究[D];華中科技大學;2004年

，

本文編號：2266305