The term “immersive audio” is frequently used to describe an audio experience that provides the listener the sensation of being fully immersed or “present” in a sound scene. This can be achieved via different presentation modes, such as surround sound (several loudspeakers horizontally arranged around the listener), 3D audio (with loudspeakers at, above, and below listener ear level), and binaural audio to headphones. This article provides an overview of two recent standards that support the bitrate-efficient carriage of high-quality immersive sound. The first is MPEG-H 3D audio, which is a versatile standard that supports multiple immersive sound signal formats (channels, objects, and higher order ambisonics) and is now being adopted in broadcast and streaming applications. The second is MPEG-I immersive audio, an extension of 3D audio, currently under development, which is targeted for virtual and augmented reality applications. This will support rendering of fully user-interactive immersive sound for three degrees of user movement [three degrees of freedom (3DoF)], i.e., yaw, pitch, and roll head movement, and for six degrees of user movement [six degrees of freedom (6DoF)], i.e., 3DoF plus translational x{x} , y{y} , and z{z} user position movements.

中文翻译：

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沉浸式音频压缩表示的 MPEG 标准


术语“沉浸式音频”经常用于描述为听众提供完全沉浸或“呈现”在声音场景中的感觉的音频体验。这可以通过不同的呈现模式来实现，例如环绕声（在听众周围水平排列的多个扬声器）、3D 音频（扬声器位于听众耳朵高度、上方和下方）以及耳机的双耳音频。本文概述了支持高品质沉浸式声音的比特率高效传输的两个最新标准。第一个是 MPEG-H 3D 音频，它是一种多功能标准，支持多种沉浸式声音信号格式（通道、对象和高阶 Ambisonics），目前已在广播和流媒体应用中采用。第二个是 MPEG-I 沉浸式音频，它是 3D 音频的扩展，目前正在开发中，针对虚拟和增强现实应用。这将支持三度用户运动[三自由度 (3DoF)]（即偏航、俯仰和滚动头运动）以及六度用户运动[六自由度]的完全用户交互沉浸式声音的渲染(6DoF)]，即 3DoF 加上平移 x{x} 、 y{y} 和 z{z} 用户位置运动。