高清光盘应用数据格式研究
发布时间：2018-08-01 08:01
【摘要】：为推动中国高清光盘产业的发展，中国高清光盘产业推进联盟结合国内蓝光和红光的力量，致力于在光盘物理格式之上建立一致的应用层格式，以提高整体竞争力。光盘应用数据格式规定了音视频流和元数据的格式，以及它们在光盘上的组织形式。如何同时兼顾到光盘物理特性、音视频数据特性及高清视频播放体验，提供最优的数据组织和访问特性，，从而设计合理的应用数据格式，成为了需要研究解决的问题。 光盘数据存在随机读取性能较差、差错率相对较高、以块存取并校验等特点。因此，将高清音视频流的封装分为复用层和物理层两层，分别处理音视频交织同步和数据之间的独立性。对封装过程采用主动容错，并结合元数据冗余存储，共同降低出错的可能性。封装结构使用动态头部的方式减少空间消耗，提高负载率，并通过均衡码率等方法充分利用光盘容量。设计了以视频对象集、时间索引、节目片段、播放链和全局影片信息为层次的元数据组织结构。为光盘节目播放提供了多重流选择、时间定位、节目场景重组、多视频文件穿插的特性，同时提高节目编著的灵活性。使用FFmpeg的复用框架构造出流复用功能的整体模块，对应实现一个平台无关的解复用开发组件。最后通过自定义的镜像生成模块构建文件系统，将元数据及其冗余文件分别定位到光盘的内道和外道，增加可靠性。 测试结果表明流复用、镜像生成和解复用整个过程均能顺利进行。流复用的负载率高于蓝光光盘，略低于MP4格式。其它各子部分也分别达到预期，方案具备可行性。
[Abstract]:In order to promote the development of China's HDCD industry, the China HDCD Industry Promotion Alliance combines the domestic forces of Blu-ray and Red Light and devotes itself to establishing a consistent application layer format on the physical format of CD-ROMs in order to improve the overall competitiveness. Optical disk application data formats specify the format of audio and video streams and metadata, and their organization on the disc. How to simultaneously take into account the physical characteristics of optical discs, audio and video data characteristics and high-definition video playback experience, to provide the best data organization and access characteristics, so as to design a reasonable application data format, has become a problem to be studied and solved. The optical disk data has the characteristics of poor random reading performance, relatively high error rate, block access and verification. Therefore, the encapsulation of high-definition audio and video stream is divided into two layers: multiplexing layer and physical layer, which deal with the synchronization of audio and video interleaving and the independence of data respectively. In the encapsulation process, active fault tolerance and metadata redundant storage are used to reduce the possibility of error. The encapsulation structure uses dynamic header to reduce space consumption, improve load rate, and make full use of optical disk capacity by balancing code rate and so on. The structure of metadata organization is designed based on video object set, time index, program segment, play chain and global video information. It provides the features of multiple stream selection, time orientation, program scene reorganization, multiple video files interlacing, and improves the flexibility of program authoring. The whole module of streaming multiplexing is constructed by using FFmpeg's reuse framework, and a platform-independent demultiplexing development component is implemented. Finally, the file system is constructed by the self-defined mirror generation module, and the metadata and its redundant files are positioned to the inner and outer channels of the optical disk, respectively, so as to increase the reliability. The test results show that the whole process of stream multiplexing, image generation and demultiplexing can proceed smoothly. The load rate of stream multiplexing is higher than Blu-ray disc and slightly lower than MP4 format. The other sub-parts also meet the expectations, the plan is feasible.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP333.4
[Abstract]:In order to promote the development of China's HDCD industry, the China HDCD Industry Promotion Alliance combines the domestic forces of Blu-ray and Red Light and devotes itself to establishing a consistent application layer format on the physical format of CD-ROMs in order to improve the overall competitiveness. Optical disk application data formats specify the format of audio and video streams and metadata, and their organization on the disc. How to simultaneously take into account the physical characteristics of optical discs, audio and video data characteristics and high-definition video playback experience, to provide the best data organization and access characteristics, so as to design a reasonable application data format, has become a problem to be studied and solved. The optical disk data has the characteristics of poor random reading performance, relatively high error rate, block access and verification. Therefore, the encapsulation of high-definition audio and video stream is divided into two layers: multiplexing layer and physical layer, which deal with the synchronization of audio and video interleaving and the independence of data respectively. In the encapsulation process, active fault tolerance and metadata redundant storage are used to reduce the possibility of error. The encapsulation structure uses dynamic header to reduce space consumption, improve load rate, and make full use of optical disk capacity by balancing code rate and so on. The structure of metadata organization is designed based on video object set, time index, program segment, play chain and global video information. It provides the features of multiple stream selection, time orientation, program scene reorganization, multiple video files interlacing, and improves the flexibility of program authoring. The whole module of streaming multiplexing is constructed by using FFmpeg's reuse framework, and a platform-independent demultiplexing development component is implemented. Finally, the file system is constructed by the self-defined mirror generation module, and the metadata and its redundant files are positioned to the inner and outer channels of the optical disk, respectively, so as to increase the reliability. The test results show that the whole process of stream multiplexing, image generation and demultiplexing can proceed smoothly. The load rate of stream multiplexing is higher than Blu-ray disc and slightly lower than MP4 format. The other sub-parts also meet the expectations, the plan is feasible.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP333.4
【参考文献】
相关期刊论文 前10条
1 季长亮;王s
本文编号：2156834
本文链接：https://www.wllwen.com/kejilunwen/jisuanjikexuelunwen/2156834.html
