COFDM Modulator SDI hauv H264 Decoder 1w paj yug 1080p koob yees duab COFDM Tswjhwm Pawg Tswjhwm COFDM Modulator H264 encoder SDI hauv SDI Koob yees duab COFDM Modulator H264 encoder SDI hauv SDI Koob yees duab hauv hlau thawv CNC 1W PADFM Txwv board modulator H264 encoder SDI koob yees duab 1080p