本文件规定了容量为25.0 GB或50.0 GB的120 mm可记录光盘的机械、物理和光学特性。它规定了记录和未记录信号的质量、数据格式和记录方法，从而允许通过此类磁盘进行信息交换。用户数据可以使用不可逆的方法写入一次并读取多次。该磁盘被标识为BD可记录磁盘。 本文件规定了以下内容: -三种相关但不同的磁盘类型； -合规条件； -操作和存储磁盘的环境； -磁盘的机械和物理特性，以便在数据处理系统之间提供机械交换； -磁盘上信息的格式，包括磁道和扇区的物理配置； -纠错码和使用的编码方法； -记录在磁盘上的信号的特征，使数据处理系统能够从磁盘读取数据。 本文件规定了磁盘驱动器之间的磁盘交换。它与卷和文件结构标准一起，提供了数据处理系统之间的完整数据交换。

This document specifies mechanical, physical and optical characteristics of a 120 mm recordable optical disk with a capacity of 25,0 Gbytes or 50,0 Gbytes. It specifies the quality of the recorded and unrecorded signals, the format of the data and the recording method, thereby allowing for information interchange by means of such disks. User data can be written once and read many times using a non-reversible method. This disk is identified as BD recordable disk. This document specifies the following: — three related but different types of this disk; — the conditions for conformance; — the environments in which the disk is to be operated and stored; — the mechanical and physical characteristics of the disk, so as to provide mechanical interchange between data processing systems; — the format of the information on the disk, including the physical disposition of the tracks and sectors; — the error-correcting codes and the coding method used; — the characteristics of the signals recorded on the disk, enabling data processing systems to read data from the disk. This document provides for interchange of disks between disk drives. Together with a standard for volume and file structure, it provides for full data interchange between data processing systems.