Welcome to the next generation of USB performance. Today’s advanced devices require significantly higher data performance to maintain the interactive experiences users have come to expect. USB4 represents a major update to deliver the next generation of USB architecture – enabling the highest USB bandwidth available and extending USB Type-C performance.
欢迎来到下一代USB性能。当今的高级设备需要显著提高数据性能，以保持用户所期望的交互式体验。USB4代表了提供下一代USB架构的重大更新——实现可用的最高USB带宽并扩展USB Type-C性能。
The USB4 Specification complements and builds upon the existing USB 3.2 and 2.0 architectures. Based on the Thunderbolt protocol specification contributed by the Intel Corporation, USB4 doubles the maximum aggregate bandwidth of USB and enables multiple simultaneous data and display protocols.
USB4 规范是对现有USB 3.2和2.0架构的补充和构建。基于英特尔公司提供的Thunderbolt协议规范，USB4将USB的最大聚合带宽提高了一倍，并支持多个同时传输数据和显示协议。
The USB4 architecture defines a method to dynamically share a single high-speed link with multiple end device types to best serve the transfer of data by type and application. As the USB Type-C connector has evolved into the role as the external display port of many host products, the USB4 specification provides the host the ability to optimally scale allocations for display data flow. Compatibility with existing USB 3.2, USB 2.0, and Thunderbolt 3 hosts and devices is supported, and the resulting connection scales to the best mutual capability of the devices being connected.
USB4架构定义了一种方法，用于与多种终端设备类型动态共享单个高速链路，以最好地服务于按类型和应用传输数据。由于USB Type-C连接器已发展成为许多主机产品的外部显示端口，USB4规范为主机提供了以最佳方式扩展显示数据流分配的能力。支持与现有USB 3.2、USB 2.0和Thunderbolt 3主机和设备的兼容性，并且由此产生的连接可扩展到所连接设备的最佳相互能力。
Key characteristics of the USB4 solution include:
USB4 解决方案的主要特性包括：
Two-lane operation using existing USB Type-C cables and up to 80 Gbps operation over 80 Gbps certified cables
使用现有的 USB Type-C 电缆进行双通道操作，并通过 80 Gbps 认证电缆以高达 80 Gbps 的速度运行
Multiple data and display protocols to efficiently share the maximum aggregate bandwidth over the bus
多种数据和显示协议，可有效共享总线上的最大聚合带宽
Backwards compatibility with all previous versions of USB
向后兼容所有以前版本的 USB
