HD PVR is the world's first High-Definition video recorder for making real-time H.264 compressed recordings at resolutions up to 1080i. HD-PVR records component video (YCrCb) from cable TV and satellite set top boxes, with a built-in IR blaster to automatically change TV channels for scheduled recordings. Audio is recorded using AAC or Dolby Digital.The recording format is AVCHD, which can be used to burn Blu-ray DVD disks. Two hours of HD recordings, recorded at 5 Mbits/sec, can be burnt onto a standard 4.7 GByte DVD-R or DVD-RW disk for playback on a Blu-ray DVD player.The HD PVRs amazing recording quality allows personal archival of your favorite high definition TV programs from any component video HD set top box. The HD PVR also has standard definition composite and S-Video inputs so you can record your old home video tapes into an AVCHD format for creating Blu-ray DVD recordings.