This [draft] Recommendation defines service and system requirements for stereoscopic 3DTV transmission over HFC based network. The stereoscopic 3DTV is the service to provide realistic broadcasting services to cable service subscribers. The service requirements in this [draft] Recommendation include video quality@ video fatigue@ video signal expression@ compatibility@ 2D/3D switched service@ conditional access@ and additional information. The system requirements in this [draft] Recommendation include video signal format@ multiplexing@ and service information.