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Posted by Kay Robinson on 11/08/07 15:13
On Thu, 08 Nov 2007 14:08:02 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> sharpened a new quill and scratched:
----> bobbit good stuff
>It is a bit more complicated then that.
>This camera, the HV20, is a single sensor chip model.
>To get color, the chip's sensor elements are covered by red, green, and blue
>filters:
> http://en.wikipedia.org/wiki/Bayer_filter
>Likely Bayer patterns (as Canon mentions 'simple RGB' in their specs).
>
>Just this fact, in itself, sort of reduces the luminane resolution by half the horizontal pixels, see:
> http://www.cambridgeincolour.com/tutorials/sensors.htm
>
>This is a consumer camera.
>Canon mentions optical stabilisation, but in many consumer cameras there is also
>digital stabilisation, the way that is done is the picture is projected on
>a smaller area then the full sensor, so it can move about horizontally and vertically,
>allowing for the electronics to move processing along with it, resulting in a stable
>picture.
>Such a scheme further reduces available resolution.
>I am not sure if the HV20 also has some digital stabilisation.
>
>If you really wanted 1920x1080 Y you would need a 3 sensor camera, or one with
>those chips that have R, G. and B behind each other (but not sure you can buy those).
Have you checked this one out?
"World's first" full-HD cam from JVC
JVC takes the wraps off its 3CCD 60GB Hard Disk Drive based Everio
GZ-HD7 3CCD high definition camcorder and claims a world first for a
cam that produces the full 1920 x 1080i HD spec
JVC's new consumer high definition Everio G Hard Disk Drive camcorder
- the 3CCD GZ-HD7 - has been unveiled in Europe, a couple of weeks
after being shown for the first time at the Consumer Electronics Show
in Las Vegas mid-January 2007.
The debut appearance took place at a special press and trade preview
in Athens, Greece, on Thursday 24th January during which invited
technology writers were shown the whole of JVC's 2007 product
offerings. This included an all-new line up of Everio HDD camcorders
and even some new MiniDV models.
High Definition quality combined with Hard Disk recording convenience
Designed to enable consumers to conveniently capture and share their
memories in full high definition without the need for removable tapes
or discs, the HD Everio GZ-HD7 is a new high definition camcorder that
provides full HD 1920x1080i video quality combined with the
convenience of hard disk drive recording and - claims its maker - is
designed to offer the simplicity of a point and shoot camcorder
combined with the features, technology and manual controls that appeal
to the serious videographer.
Its 60GB (Gigabyte) built-in hard disk drive provides up to five hours
of full HD 1920x1080i recording at a maximum rate of 30Mbps (Megabits
per second). As a means of ensuring high image quality, the GZ-HD7
features three 1/5th inch CCDs and a Fujinon lens. Other features
include OIS (Optical Image Stabilisation), a full array of manual
controls, multiple digital connections, bundled editing and archiving
software, and availability of an optional HD Everio Share Station for
quick and easy transfer of footage direct from the camcorder to DVD
disc via USB 2.0 connectivity.
Choice of Recording Modes
In addition to its highest quality Full HD recording mode that records
five hours of full HD 1920x1080i MPEG2 Transport Stream video with
MPEG 1 Layer 2 audio, the HD Everio offers a long seven hour SP mode
with a resolution of 1440x1080i, and Constant Bit Rate 1440CBR mode
with a resolution of 1440x1080i and a five-hour capacity.
Record Mode Record Resolution CODEC
Video/Audio System Bit Rate Recording Time
FHD (Full HD High Quality Mode) 1920x1080i MPEG2-TS / MP2 (MPEG1 Layer
2) Variable Bit Rate (VBR): Max 30Mbps Ave. 26.6Mbps approx. 5hrs
SP (Long Time 7 Hour Mode) 1440x1080i MPEG2-TS / MP2 (MPEG1 Layer 2)
VBR: Max 22Mbps Ave. 19Mbps approx. 7hrs
1440CBR (Constant Bit Rate Mode) 1440x1080i MPEG2-TS / MP2 (MPEG1
Layer 2) Constant Bit Rate (CBR): 27Mbps approx. 5hrs
Because the Everio GZ-HD7 uses the MPEG2 Transport Stream video format
to make its recordings to the internal hard disk drive, the resulting
clips can be archived onto Blu-ray discs using software that is
provided with the product, in addition to copying direct to a high
definition Blu-ray recorder.
For bright, realistic colours the HD Everio uses three 1/5-inch CCDs ?
one each for red, green and blue, with (we're informed) Pixel-Shift
technology on the Green channel being employed to enable the full 1920
x 1080i pixels resolution as required to meet the full HD
specification. In addition, to ensure precise prism/CCD registration,
JVC has incorporated Fujinon mounting technology used in professional
camcorders - another first for a lens system normally associated with
professional television and video cameras.
Superior optical performance
Fujinon also supplies the HD Everio?s 10x optical zoom lens which
provides superior optical performance and nearly the same brightness
(F1.8-1.9) throughout its f=3.3mm - 33mm zoom range by virtue of its
three aspherical lens elements, one made of indexed glass.
In addition, the lens surface is coated with a new Electronic Beam
Coating (EBC) which is designed to reduce the degradation caused by
light reflecting off the lens surfaces, and leading to greater light
transmission and reduced flaring and ghosting. To preserve that
quality, the HD Everio features optical image stabilisation (OIS),
thus avoiding the signal degradation caused by electronic image
stabilisation which might be particularly noticeable in HD footage. In
short, HD Everio matches its high-definition recording capability with
a proven HD lens section by Fujinon that has proven its value in the
broadcast industry.
----
Love to hear some opinions.
Cheers
Kay
--
All replies to newsgroup thank you
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