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Integrated audio-video synchronization system for use in multimedia applications

机译:集成的音频视频同步系统,用于多媒体应用

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摘要

The use of multimedia system have moved beyond the studio barriers and into the homes. As computers become more powerful, multimedia systems become more realizable on the PC. As these multimedia systems become more complicated, the need to provide complex integration systems and synchronization arises. To develop a multimedia system, one must ensure that a synchronization approach is in place to solve the timing issues related to the media types involved. Temporal information in multimedia systems must be maintained such that no loss of coherency is endured. The system must ensure that no matter how much processing is performed on the signals, the output has to maintain the temporal integrity of the signals as they were when they were inputted. This thesis develops a multimedia system that processes two media streams. Audio and video streams are fed to the system. The system produces an object segmented output, (silhouettes of the object) along with the recognized speech from the audio. The speech that is to be recognized by the system is spoken by the objects/speakers. The challenge lies in maintaining the synchronization and integrating the video and the recognized speech at the output. Note that the system is a stream based system by that the video and audio are continuously captured and processed. This thesis presents a solution to the problem of synchronization in the temporal domain and the overall integration of the multimedia system. The thesis presents a time-stamp approach to solve the synchronization problem between audio and video signals. This approach is adaptive to the cases where the video processing delay is larger or smaller than the audio processing delay. The contributions include the verification of using time-stamps in the synchronization process and that it is possible to synchronize heavily delayed signals. The system requires an integration process such that the audio and video signals are integrated with one another at the output
机译:多媒体系统的使用已经超越了录音室的障碍,进入了家庭。随着计算机功能的增强,多媒体系统在PC上的实现也越来越多。随着这些多媒体系统变得越来越复杂,需要提供复杂的集成系统和同步。为了开发多媒体系统,必须确保采用同步方法来解决与所涉及的媒体类型有关的时序问题。多媒体系统中的时间信息必须得到维护,以免遭受连贯性的损失。系统必须确保无论对信号执行多少处理,输出都必须保持信号在输入时的时间完整性。本文开发了一种处理两个媒体流的多媒体系统。音频和视频流被馈送到系统。系统会产生一个对象分段输出(对象的剪影)以及从音频中识别出的语音。对象/扬声器说出系统要识别的语音。挑战在于保持同步,并在输出端集成视频和识别的语音。注意,该系统是基于流的系统,通过该系统可以连续捕获和处理视频和音频。本文提出了时域同步和多媒体系统整体集成的解决方案。本文提出了一种时间戳方法来解决音频和视频信号之间的同步问题。该方法适用于视频处理延迟大于或小于音频处理延迟的情况。所做的贡献包括验证在同步过程中使用时间戳,并可以同步严重延迟的信号。该系统需要一个集成过程,以便音频和视频信号在输出端彼此集成

著录项

  • 作者

    El-Helaly Mohamed;

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  • 年度 2006
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  • 原文格式 PDF
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