In the late 1990s, as HDTV broadcasting commenced, HDTV cameras suitable for news and general purpose work were introduced. Though they delivered much better image quality, their overall operation was identical to their standard definition predecessors. New methods of recording for cameras were introduced to supplant video tape, tapeless cameras. Ikegami and Avid introduced EditCam in 1996, based on interchangeable hard drives. Panasonic introduced P2 cameras. These recorded a DVCPro signal on interchangeable flash memory media. Several other data storage device recording systems were introduced, notably XDCAM from Sony. Sony also introduced SxS (S-by-S), a flash memory standard compliant to the Sony and Sandisk-created ExpressCard standard. Eventually flash storage largely supplanted other forms of recording media.