HD camcoders

Posted on February 8, 2007. Filed under: computer |

HD camcorders

If format proliferation is the sign of growing pains in a market, camcorders are in adolescent hell. Prices are dropping, making HD camcorders an attractive buy relative to their SD competitors, but inexpensive doesn’t necessarily mean easy. Our most recent tally indicates there are no fewer than four possible media types to use, each of which can support multiple encoding formats; the encoding formats, in turn, support various combinations of standard-definition (SD) and high-definition (HD) video formats.Toss in HD’s three different available resolutions, and you have an ugly mess to sort through while you shop. And we haven’t even begun to see the inevitable models based on HD-DVD or Blu-ray discs.

Granted, some of the options currently apply only to the professional shooter. But with ever-improving displays and playback devices, expectations have risen as well, making today’s pro technologies tomorrow’s vacation must-haves.

HD recording formats: 720p or 1080i

720p 1080i
Example products Sanyo Xacti VPC-HD1
Sanyo Xacti VPC-HD1
JVC GY-HD110U
JVC GY-HD110U

JVC GY-HD100U
JVC GY-HD100U

JVC GR-HD1
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: 1,280×760
Encoding resolution: 1,280×720
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: 1280×720
Encoding resolution: 1280×720
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: 1,920×1,080
Encoding resolution: 1,440×1,080
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.

HD recording formats: 720p and 1080i

Example products Sony Handycam HDR-FX1
Sony Handycam HDR-FX1

Canon XL H1
Canon XL H1

Sony Handycam HDR-HC3
Sony Handycam HDR-HC3

Canon XH G1
Canon XH G1

Sony Handycam HDR-UX1
Sony Handycam HDR-UX1

Sony Handycam HDR-SR1
Sony Handycam HDR-SR1

Panasonic AG-HVX200
Panasonic AG-HVX200
Recording format HDV
Note: The HDV format specification supports both 720p and 1080i recording, but camcorders can generally record only one or the other–usually 1080i.
Sony/Panasonic AVCHD Panasonic DVCPro HD (a.k.a. DVCPro 100)
Supported media types Tape Flash, DVD, hard disk Tape, Flash (Panasonic P2), external hard drive
Format details MPEG-2 inter- and intraframe compressed to fit on a standard MiniDV tape and use the same bit rate.
Max bit rate: 25Mbps
Capture resolution: 1,440×1,080/1,280×720
Encoding resolution: 1,920×1,080/1,280×720
Color sampling: 4:2:0
Variable frame rate: no
An HD version of the MPEG-4 Advanced Visual Codec–not to be confused with MPEG HD–which uses the H.264 compression scheme.
Max bit rate: 24Mbps
Capture resolution: 1,920×1,080/1,280×720
Encoding resolution: 1,920×1,080/1,280×720
Color sampling: 4:2:0
Variable frame rate: yes
MPEG-2 inter- and intraframe compressed to fit on a standard DVCPro tape and stream at the same bit rate.
Max bit rate: 100Mbps
Capture resolution: 1,920×1,080/1,280×720
Encoding resolution: 1,280×1,080/960×720
Color sampling: 4:2:2
Variable frame rate: yes
Hardware issues Same limitations as all tape formats: must be converted to files for editing or connected directly to TV. HD video of DVD-based models are incompatible with older players and will likely have some growing pains with respect to new ones. In theory, they should be compatible with Blu-ray and future players with explicit AVCHD support built in. None
Video-editing issues Can be slow and tedious to work with because of time required to download to computer. Currently, there’s no software support for editing AVCHD video, the operating system requires a device driver to read the DVDs, and special player software is necessary. As you might imagine, the video files produced can be huge and therefore cumbersome to capture and edit.

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