数字视音频技术的研究及在智能社区中的应用
发布时间：2019-04-26 06:52
【摘要】：随着信息技术迅速发展,单一的语音媒体技术已经不能满足人们对通信的要求。据统计,人类所获得99%以上的信息都是通过听觉和视觉获取的,因此人们也非常希望相互通信过程中能够包含视频与语音的交流,必要时能够进行视音频信息互传,直接实现现场级的信息共享。在这种需求的驱动下,视音频技术发展迅速,并深入应用到办公、教育、商业、家庭生活、科学研究等各个领域。视音频同步技术是确保视音频服务质量的重要手段之一,也是未来多媒体通信研究方向之一；由于视音频技术已应用到各个领域,每天产生的视音频数据呈爆炸式趋势增长,如何快速、高效、安全地存储视音频数据也成为如今视音频技术研究的热点和面临的重大挑战之一。 视音频同步技术已广泛应用于各种应用平台,但不同应用平台,其视音频同步技术的实现方式也各不相同,且实现代码都经过了保密性封装,视音频同步的跨平台应用受到了很大的限制。本文首先针对以上不足,提出了一种视音频同步策略,将系统同步应用设计分为三个部分：发送端同步、网络传输同步以及接收端同步,并编写通用的底层硬件驱动软件,屏蔽底层硬件解码操作细节,大大简化了视音频同步应用软件的跨平台应用,方便了视音频同步技术的实现。此外,针对某类非常典型的视音频应用系统,其特点表现为：存储文件的数量庞大,单个文件的数据量较小,数据访问非常频繁,数据存储空间巨大且较分散等特点,提出一种分布式存储算法,选择以二叉堆结构组织存储节点的信息,结合网络状况以及CPU利用率两方面因素确定存储节点,快速查找出最优存储节点,达到了充分利用系统存储空间和快速存取文件的目的。 论文工作中还包含了视音频同步策略、分布式存储算法的测试,并详细分析了测试数据、测试结果和应用系统的性能,结果表明本文提出的两种算法均能较好地改善系统的性能,提高系统的运行效率。最后,对全文进行总结,给出了进一步研究的方向和研究重点。
[Abstract]:With the rapid development of information technology, single voice media technology can no longer meet the requirements of communication. According to statistics, more than 99% of the information obtained by human beings is obtained through hearing and vision, so people also very much hope that video and voice communication can be included in the process of mutual communication, and video and audio information can be transmitted to each other if necessary. Direct implementation of field-level information sharing. Driven by this demand, video and audio technology has developed rapidly and has been applied in many fields, such as office, education, business, family life, scientific research and so on. Video and audio synchronization technology is one of the important means to ensure the quality of service of video and audio, and it is also one of the research directions of multimedia communication in the future. Since video and audio technology has been applied to various fields, the daily production of video and audio data shows an explosive trend of growth, how to fast and efficient, Safe storage of video and audio data has become one of the hot topics and major challenges in the field of video and audio technology. Video and audio synchronization technology has been widely used in various application platforms, but different application platforms, their video and audio synchronization technology is also different, and the implementation code has been confidential encapsulation. The cross-platform application of video and audio synchronization has been greatly limited. In this paper, a video and audio synchronization strategy is proposed. The system synchronization application design is divided into three parts: transmitter synchronization, network transmission synchronization and receiver synchronization, and a general hardware driver software is written. Shielding the details of the decoding operation of the underlying hardware greatly simplifies the cross-platform application of the video and audio synchronization application software and facilitates the implementation of the video and audio synchronization technology. In addition, aiming at some kind of very typical video and audio application system, its characteristics are as follows: the number of stored files is huge, the amount of data in a single file is small, the data access is very frequent, the storage space of data is huge and scattered, and so on. In this paper, a distributed storage algorithm is proposed, in which the information of storage nodes is organized with binary heap structure, and the storage nodes are determined according to the two factors of network condition and CPU utilization, and the optimal storage nodes are found quickly. Achieve the full use of the system storage space and fast access to files. The paper also includes the video and audio synchronization strategy, distributed storage algorithm test, and detailed analysis of the test data, test results and the performance of the application system. The results show that the two algorithms proposed in this paper can improve the performance of the system and improve the operating efficiency of the system. Finally, the thesis is summarized, and the direction and emphasis of further research are given.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333
本文编号：2465845
[Abstract]:With the rapid development of information technology, single voice media technology can no longer meet the requirements of communication. According to statistics, more than 99% of the information obtained by human beings is obtained through hearing and vision, so people also very much hope that video and voice communication can be included in the process of mutual communication, and video and audio information can be transmitted to each other if necessary. Direct implementation of field-level information sharing. Driven by this demand, video and audio technology has developed rapidly and has been applied in many fields, such as office, education, business, family life, scientific research and so on. Video and audio synchronization technology is one of the important means to ensure the quality of service of video and audio, and it is also one of the research directions of multimedia communication in the future. Since video and audio technology has been applied to various fields, the daily production of video and audio data shows an explosive trend of growth, how to fast and efficient, Safe storage of video and audio data has become one of the hot topics and major challenges in the field of video and audio technology. Video and audio synchronization technology has been widely used in various application platforms, but different application platforms, their video and audio synchronization technology is also different, and the implementation code has been confidential encapsulation. The cross-platform application of video and audio synchronization has been greatly limited. In this paper, a video and audio synchronization strategy is proposed. The system synchronization application design is divided into three parts: transmitter synchronization, network transmission synchronization and receiver synchronization, and a general hardware driver software is written. Shielding the details of the decoding operation of the underlying hardware greatly simplifies the cross-platform application of the video and audio synchronization application software and facilitates the implementation of the video and audio synchronization technology. In addition, aiming at some kind of very typical video and audio application system, its characteristics are as follows: the number of stored files is huge, the amount of data in a single file is small, the data access is very frequent, the storage space of data is huge and scattered, and so on. In this paper, a distributed storage algorithm is proposed, in which the information of storage nodes is organized with binary heap structure, and the storage nodes are determined according to the two factors of network condition and CPU utilization, and the optimal storage nodes are found quickly. Achieve the full use of the system storage space and fast access to files. The paper also includes the video and audio synchronization strategy, distributed storage algorithm test, and detailed analysis of the test data, test results and the performance of the application system. The results show that the two algorithms proposed in this paper can improve the performance of the system and improve the operating efficiency of the system. Finally, the thesis is summarized, and the direction and emphasis of further research are given.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333
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