Does any HDV do 1920x1080?

[David9799]

I've never seen a HDV cam do 1920x1080. Can HDV not do that rez? Maybe a pro camcorder can but im looking for one under a grand.

[minidv2dvd]

HDV is a spec. 720p or the more popular 1440x1080 tape fromat. 1440x1080 on tape is a 1920x1080 image compressed.

[David9799]

How will a 1440x1080 movie look if i burn it to a blu-ray disc? Will it take up my 52" 1920x1080 screen without looking worse?

[videopoo]

1440x1080 is anamorphic of 1920x1080

[minidv2dvd]

when you encode HDV 1440 to br spec you will encode and burn it as 1920x1080

[minidv2dvd]

if you just want to play it from the cam, some like the canon hv30/40 have hdmi output to hook directly to HD tvs and it ouputs at 1920x1080.

[David9799]

Acutally the software i use will let me burn it at 1440x1080 to a blu-ray disc. Will it take up my hole screen that is a 52" 1920x1080?

I don't have a stand alone blu-ray player to find out.

Thanks

[racer-x]

It should if you did it correctly...............

As stated previously, 1440 x 1080 is anamorphic 16x9 and should display as 1920x1080. Just as anamorphic 16x9 SD 720x480 should display as 854x480....................

You can of course just encode it as square-pixels 1920x1080 and not worry about it..............

[edDV]

How will a 1440x1080 movie look if i burn it to a blu-ray disc? Will it take up my 52" 1920x1080 screen without looking worse?

Just about everything you see on HD ATSC broadcast television was recorded 1440x1080i in HDCAM format. Look at the Leno show or CSI. Both are recorded to 1440x1080i HDCAM.

The effects of a 1440 to 1920 stretch are small and wouldn't be noticed on a consumer camcorder. Bit rate is more important. Recording at 1440x1080 saves 25% of the pixels and 25% of the bitrate. To get the same MPeg2 quality at 1920x1080, one would need to record at 33.3Mb/s.

If you stretch HDV to 1920x1080i for Blu-Ray, you should compensate with 33 to 35 Mb/s bit rate to maintain quality.


PS to the title question, XDCAM-HD format is very similar to HDV but with adjustable resolution and bit rate. XDCAM-HD records 1920x1080i at ~35Mb/s for direct Blu-Ray recording. XDCAM-EX allows flash ram recording up to 50 Mb/s. http://en.wikipedia.org/wiki/XDCAM

PVM-EX1

[Soopafresh]

There's a JVC model which shoots full 1920x1080 HDV

[minidv2dvd]

soopa - any idea what model #? all the jvc hdv cams i've run across shot 720p.

[David9799]

Nice wish i could afford that!

[hazydave]

Nope.. HDV is defined to support only 1280x720/30p or 1440x1080/60i... in theory. Obviously, the same tricks used on DV enable 1440x1080/24p (the camera does 3:2 pulldown and stores it as if it had been 60i) or 1440x1080/30p (the camera just stores progressive frames instead of interlaced frames).

I have done a few long format (1.5-2.5 hour) Blu-Ray discs from HDV, and it's hard to imagine the difference between 1440 and 1920 is all that important. And you win in other ways... 1440 at 25Mb/s results in overall higher quality than you'd get with 1920 at 25Mb/s (less filtering necessary in the MPEG-2 compression process).

And keep in mind, 1440x1080 is a supported Blu-Ray format, so there's no need to do any upscaling... just let the player scale as necessary. Doing an upscale when authoring would just lower the overall quality of the video you put down on BD... there's no magic you can do that the player can't do here.

I have one 1920x1080 camera... a Hitachi BD camcorder. It's not bad in good light, and there's some advantage at times having the video in "computer" format, rather than having to acquire HDV. But I'd rate it the weakest overall of my three HD camcorders (one Sony pro(ish) model, one Canon prosumer/consumer model).

[David9799]

Great info thanks again!

[edDV]

Nope.. HDV is defined to support only 1280x720/30p or 1440x1080/60i... in theory. Obviously, the same tricks used on DV enable 1440x1080/24p (the camera does 3:2 pulldown and stores it as if it had been 60i) or 1440x1080/30p (the camera just stores progressive frames instead of interlaced frames).

Just to add RE: HDV 720p, JVC has added what they call "ProHD" native progressive 1280x720 24p with LPCM uncompressed audio and claim this is within the HDV standard. In this mode quality is enhanced with more bit rate per frame.

http://www.jvc-victor.co.jp/english/pro/prohd/concept/index.html

JVC have also extended outside HDV 1280x720p 30fps compression with pre compression 1280x720p @ 59.94fps available as analog YPbPr for external capture (e.g. by AJA or BlackMagic cards). Incamera recording is done HDV 720p 30fps or 60fps using a proprietary codec. This is a very good and economical choice for high action sports.

[minidv2dvd]

eddv - is the tape bitrate on the jvc 720p their usual 19.7mbps or like canon's 25mbps 1080p?


[edit]
i found it on one of the jvc pages. it's 19.7

[edDV]

eddv - is the tape bitrate on the jvc 720p their usual 19.7mbps or like canon's 25mbps 1080p?


[edit]
i found it on one of the jvc pages. it's 19.7

As far asI know it is 19.7Mb/s.

JVC gets the better pictures with native three 1/3" 1280x720 sensors (no single sensor or scaling losses), broadcast or film lenses, better processing and some borderline proprietary codec tweaks that are supported by four edit programs ("Final Cut Pro", "Avid Liquid", "Eduius Pro/Broadcast" "Matrox Axio").