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JVC GZ-HD7 Coming in April

post #1 of 13
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JVC Develops First Consumer Full HD Recording 3-CCD Camcorder System Featuring 16:9 Progressive Scan CCDs

Broadcast HD Camera Fujinon Lens Also for First Time in Consumer Camcorder

JVC has developed the first consumer full High-Definition 3-CCD camcorder capable of shooting and recording full HD images (1920 x 1080i). The technology will be offered in the new HD Everio GZ-HD7 to be available in April 2007, marking the technology's first use in a consumer camcorder. The camcorder also features a Fujinon lens used in broadcast video cameras, now being used in a consumer camcorder for the first time. The 3-CCD system offers superior color reproduction.

Amid rapidly rising market needs for full HD equipment, JVC borrowed from its other high-quality, high-resolution image technologies developed over many years of camcorder research to develop this system, including its progressive CCD camera system, 3-CCD camera system, super high-end processor, and new HD Gigabrid high-resolution signal processing engine.

1. Full HD Images Created by 16:9 Progressive Scan CCDs recorded in full HD 1920 x 1080i to Hard Drive Camcorder for First Time (as of January 2007) in Consumer Industry.

JVC has developed the industry's first (as of January 2007) high-quality full HD 3-CCD camcorder system for use in a consumer camcorder. It uses three 1/5-inch 16:9 progressive scan CCDs designed for HD use in a diagonally offset pixel configuration to generate the high resolution image for recording in full HD, explained in the technical detail section later in this article.

Designed for HD use, the 1/5-inch 16:9 progressive scan CCD has large pixels measuring 3.28 microns x 3.28 microns, roughly twice the size of pixels in JVC 2-megapixel camcorders, for greater modulation transfer function (MTF) and sensitivity values. The CCD aspect ratio was tailored to16:9 for full HD recording in a hard drive camcorder for the first time at JVC. The compact camera unit produces high-resolution images that are recorded in full HD 1920 x1080i resolution.

2. First Use (as of January 2007) of Broadcast HD Video Camera Fujinon Lens in Consumer Camcorder.

The highly regarded Fujinon lens used in the JVC system is also used in broadcast HD video cameras. Three aspherical lens elements provide the superior optical performance over the entire zoom range suitable for an HD system. The 3-CCD system has minimal drop off in F. No. because one of the aspherical lens elements is made of indexed glass. The resulting minimal F. No. is F1.8 wide open and F1.9 for telephoto, while keeping the lens unit small.

In addition, the lens surface is coated with a new Electronic Beam Coating (EBC) as used for broadcast HD lenses. In this process, vaporized chemical material is deposited onto the lens surface with an electronic beam inside a vacuum evaporation device. This coating greatly reduces degradation caused by reflected light on the lens surface, leading to greater light transmission. This reduces detrimental flaring and ghosting as much as possible for black levels.

As it does in the acclaimed and award-winning Everio GZ-MG505 3-CCD hard disk camcorder, JVC adjusts the GZ-HD7's three CCDs precisely in the 3-CCD prism on each axis of a 6-axis color matrix before mounting them firmly in place with the high precision appropriate for an HD camera.

Newly Developed Progressive Scan CCD Overview
Image size: 1/5 Diagonal
Aspect ratio: 16:9
Pixel size: 3.28 microns x 3.28 microns
Total number of pixels per CCD: 1016 x 558, approximately 570,000 pixels
Number of effective pixels per CCD: 976 x 548, approximately 530,000 pixels

JVC Uses Pixel Shift Technique

The Red and Blue imaging CCDs are shifted a half-pixel both horizontally and vertically relative to the Green imaging CCD. Because the pixel-shift system uses progressive scan CCDs, signals are processed first as 1920 x 1080p progressive signals, then converted to 1920 x 1080i interlace signals for recording.

As a result, the system records a higher resolution HD image than the interline (IL) CCD system

Pixel summary of recorded images
Total pixels: 2032 x 1116 (equivalent to 2.27 million pixels)
Number of effective pixels: 1952 x 1096 (equivalent to 2.14 million pixels)

The analog front end (AFD) uses 14-bit signal processing to produce HD high-quality resolution.

JVC developed a new HD-specific processing circuit to process high-density interpolation signals for brightness and color. The circuit separates low frequency and high frequency components of the brightness signal to create an image with exceptional color reproduction and less moiré.

post #2 of 13
which compression scheme will this unit uses?
post #3 of 13
Thread Starter 
MPEG-2 Transport Stream
post #4 of 13
Is it as easy to edit as DV tape via computer? And is the PQ as good as DV tape. And what would one do "in the field" if one needed to make more room on the HD? (I would always be using the highest PQ setting.) Is the HD removable and replaceable? (I haven't read all of the spec sheet yet, but I will.)
I do like the manual focus ring.

The cost is a little much for me.
And it uses 3 1/5" CCDs as opposed to Canon's 1 2.96" Cmos. It achieves its HD rating by pixel shifting. Is this noticeable?

It does look and sound interesting. But I need to be able to edit with the best compression scheme. Would this data be a problem for Mac? (I use Mac and Win)

Thanks for any answers.
post #5 of 13
Thread Starter 
Out of all the HD capable compression schemes (VC1, MPEG2, AVC), MPEG2 has the most support and is the most adopted so it should be a snap to transfer and edit. The picture quality for this camcorder should be high due to the 3 1080p CCD's and high bit rate encoding (30Mbps).

The HDD will not be removable, so there's not much you can do "in the field" other than switch to compact flash cards or delete anything you absolutely don't need.

From my own research the 3CCD setup has been implemented mostly on professional HD camcorders due to their high color saturation and overall picture quality. Their limitation is power consumption. CMOS, on the other hand, originated as an efficient imaging sensor technology and has been improving in picture quality. The major limitation of CMOS is in low level lighting situations. "Pixel Shifting" has been around for quite a while in is used in all multi CCD setups. It's unnoticeable to the human eye and results in a very high quality picture. The effect is similar to "wobulation" in DLP displays.

Look for the price to be significantly lower from online retailers not long after the camcorder hits the market.
post #6 of 13
This all sounds very good. And is it true that one could download media onto flashmedia, such as 4 gig SD cards? And would the files be of the correct size to do so? That would be great. A real plus.

I know I have read quite a bit of criticism of HD cameras however. And it's not about MPEG2. Not all MPEG2s are created alike from what I read. Perhaps someone else who knows about this can chime in.
And the 3 1080P CCDs is actually not 3 1920X1080 chips. I know about the Pixel-shifting but I would really like to see and/or read a white paper about this.

We are in the infancy period of HD consumer cameras and I would like to get something that will last more than 2 years.

I do like the wider angle lens on the JVC compared to the Canon.

Thanks for all the info!
post #7 of 13
How does JVC camera's so far compare with CAnon and Sony of similiar models?
post #8 of 13
based on my personal experience with their PQ in the past (HDV, Hi8, S-VHS-C and miniDV), I wouldn't touch anymore JVC camcorder.
post #9 of 13
Thus far non-tape camcorder 'solutions' have not been as good as tape-based cams in terms of picture quality.
post #10 of 13
Would most existing video editing packages be able to handle this cameras MPEG2 stream, or are they tuned more specifically for the 25k constant bitrate 1440x1080 HDV style stream.

This camera really does look fantastic, at least on paper. It exceeds the offerings from Sony and Canon in most regards from my point of view. 1920x1080 square pixel is a big big plus.
post #11 of 13
Thread Starter 
Originally Posted by Ken Ross View Post

Thus far non-tape camcorder 'solutions' have not been as good as tape-based cams in terms of picture quality.

If that's the case, and it's opinion based anyway, I don't think it's due to being "tape less." It's much more likely due to the quality of the image capturing/image processing/image encoding then anything else. If anything, "tape less" would have a storage advantage that would allow a more aggressive codec to be used to further enhance the image quality.
post #12 of 13
I only have hands on with DV tapes. The transferred information edits very well. Everything I've read (and I've read a lot as I want to use tape alternatives) states that the codecs used with tapes result in better transfer capability, less compression and easier editing.
Mac users are especially harsh on HDDs. (I mostly use Win)

But I'd prefer to not to use DV tapes. I can't afford to experiment. I have to use what seems to work most universally best. And after much googling and forum reading DV tapes come out on top.

But, I never say never.
post #13 of 13
Originally Posted by Ragnarok View Post

If that's the case, and it's opinion based anyway, I don't think it's due to being "tape less." It's much more likely due to the quality of the image capturing/image processing/image encoding then anything else. If anything, "tape less" would have a storage advantage that would allow a more aggressive codec to be used to further enhance the image quality.

it's not opinion-based.

tape-based such in miniDV uses DV25 compression. HDD and DVD based camcorders use MPEG-2 compression. The difference in quality is quite noticable even on a properly calibrated 20" TV.

There is no "further processing" done on HDD-based camcorders. Everything is done in real time.
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