| |
720p |
1080i |
| Example products |
Sanyo Xacti VPC-HD2 |
JVC GY-HD200U
JVC GR-HD1
|
Currently used by pro products costing upwards of $16,000. |
| Recording format |
MPEG-4 |
JVC ProHD
HDV variation limited to 720p capture |
Sony XDCAM HD (a.k.a. MPEG HD) |
| Supported media types |
Flash, hard disk |
Tape, hard disk |
Proprietary disc format |
| Format details |
MPEG-2 with intraframe-only compression (MP@H-14)
Max bit rate: 19.7Mbps
Capture resolution: 1,280x720
Encoding resolution: 1,280x720
Color sampling: 4:2:0
Variable frame rate: yes |
MPEG-2 with intraframe-only compression (MP@H-14)
Max bit rate: 19.7Mbps
Capture resolution: 1280x720
Encoding resolution: 1280x720
Color sampling: 4:2:0
Variable frame rate: yes |
MPEG-2 MP@HL compression, a high-bit rate inter- and intraframe compressor
Max bit rate: 35Mbps
Capture resolution: 1,920x1,080
Encoding resolution: 1,440x1,080
Color sampling: 4:2:0
Variable frame rate: yes |
| Hardware issues |
Quality may vary widely across different products because unlike most other formats, MPEG-4 doesn't mandate predetermined bit rate levels; for instance, the Sanyo camcorder operates at 9Mbps, far below the 19.7Mbps maximum. |
Tapes recorded in ProHD format can be played only by JVC camcorders and JVC professional decks. |
Did we mention the proprietary disc format? Designed for closed-system work flows. |
| Video--editing issues |
At low bit rates, the highly compressed originals won't stand up well to subsequent editing and recompression. |
None |
Supported only by high-end video-editing software. |
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HD recording formats: 720p and 1080i
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