Quality of service evaluation for spatial audio coding and processing systems

空间音频编码和处理系统的服务质量评估

• 批准号: EP/D041244/1
• 负责人: Francis Rumsey
• 金额: $ 35.6万
• 依托单位: University of Surrey
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD041244%2F1
• 关键词: Quality; service; evaluation; spatial; audio

This collaborative project will undertake basic research leading to a means of measuring the perceived spatial quality of sound processing equipment in an objective fashion. This will enable the automatic evaluation of degradations in spatial quality, as compared with an unimpaired reference. Such a system needs to be able to evaluate the quality of spatial sound reproduced by arbitrary rendering formats and loudspeaker layouts, so the research is based on the idea of modelling and evaluating the reproduced sound field at the listening position rather than measuring the reproduced audio signals themselves. This is needed because current standards for audio quality measurement do not take spatial factors into account.Test signals and perceptually relevant measurements will be designed to evaluate the spatial performance of the device under test followed by the prediction of a perceptual 'difference grade' between a reference spatial audio representation and an impaired representation. This requires the mapping of objective measurements to listening test results and the development of context-senstive statistical models that take into account the type of programme material involved.

该合作项目将进行基础研究，以客观地测量声音处理设备的感知空间质量。这将使得能够自动评估与未受损参考相比的空间质量退化。这样的系统需要能够评估通过任意渲染格式和扬声器布局再现的空间声音的质量，因此该研究基于在收听位置处对再现的声场进行建模和评估的想法，而不是测量再现的音频信号本身。测试信号和感知相关测量将被设计用于评估被测设备的空间性能，然后预测参考空间音频表示和受损表示之间的感知“差异等级”。这就需要将客观的测量结果与听力测试结果相对应，并开发考虑到所涉节目材料类型的对背景有敏感认识的统计模型。