本文档定义了一个MXF扩展，它支持专门应用程序的反向播放。使用串行存储、内存或计算能力有限的设备可能会发现难以管理完整的MXF索引表。该扩展提供了反向播放功能，而不改变MXF格式（SMPTE 377M）的结构或任何操作模式（例如SMPTE 378M）。该扩展设计用于操作模式1a。该概念可由实现者自行决定与其他操作模式一起使用。该系统元件与GC系统方案1兼容。

This document defines an MXF extension that supports reverse play for specialized applications. Devices that use serial storage, have limited memory or computing capacity may find managing full MXF index tables difficult. This extension provides reverse play capability without altering the structure of the MXF Format (SMPTE 377M) or any operating patterns (for example; SMPTE 378M). This extension was designed to be used with Operational Pattern 1a. The concept may be used with other operational patterns at the discretion of the implementers. This system element is compatible with GC system scheme 1.