The KWorld TV878 Crossbar is a driver related to a TV tuner card or video capture device manufactured by KWorld. The Crossbar refers to a video capture architecture in Windows that helps manage video input/output from the tuner card, allowing your computer to interface with video sources (like TV signals, composite video, etc.).

This driver is often required for KWorld's TV tuner cards or video capture devices that utilize the Conexant 878 chipset, which is part of the Conexant 878 video capture family. The Crossbar part refers to the software interface that manages the routing of video and audio signals from the device.