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HDV records high-definition video on DV tapes:
720p is recorded at roughly 19 Mbit/sec while 1080i records at 25 mbit/sec.
In 720p, the luma sampling matrix is 1280x720, square pixel, exceeding DVCPROHD's 960x720 sampling.
In 1080i, the sampling matrix is 1440x1080, with 1.33:1 pixels; this is the same luma sampling used in HDCAM and exceeds DVCPROHD's 1280x1080 sampling.
Color sampling is 4:2:0 in all HDV formats.
HDV uses long-GOP MPEG2 for video, with a 6-frame GOP for 720p and a 15-frame GOP for 1080i.
MPEG 1 Layer 2 is used to store 16-bit, 48 kHz 2-channel audio at 384 kbit/sec, with 4:1 compression.