HVX upscaling image?

JimSlaton

JimSlaton

Member
Hello all,

I have owned an HVX200 for over a year but haven't got a chance to do much with it until this week. I am currently in L.A shooting a project that is a three camera shoot. One of these cameraman has an JVC E2HD-100 and he has been telling me that the HVX doesn't have an actual whole frame size and the camera is actually "up sizing" and/or scaling the image.

He has also been telling me that the HVX 200 doesn't actually shoot in real progressive but in an interlaced format that forms each whole frame to make progressive. I'm wanting to know if my HVX200 is doing any of this "up scaling" and if it shoots true progressive? What is he talking about? I'm not sure if I got the terminology correct but I definitely want to know the facts about the HVX200.

Thanks in advance...Jim
 
It's a couple of common misunderstandings...


The HVX200 uses a 3CCD sensor array that has been a standard setup in TV & Video cameras for ages.

No one sensor is the full resolution of the image, but collectively the sensor array captures a fully HD image.


And yes, the image sensors are fully progressive image sensors.
For signal & codec compatibility, some modes record progressive images in an interlaced data-stream. But the pictures themselves are always captured progressively, and then again displayed/edited progressively.

- Mikko
 
Can others please post their comments about this. I would like to have more information about the HVX200 vs JVC E2HD-100?
 
JimSlaton said:
.... He has also been telling me that the HVX 200 doesn't actually shoot in real progressive but in an interlaced format that forms each whole frame to make progressive. ...
Click to expand...

This sounds like a misunderstanding born out of the way the DVX works, which since tape can only record 60i it does different forms of telecine to get a progressive image.

But your HVX has shooting modes that capture pure progressive frames, do a kind of telecine like teh DVX where some are intelaced and some not, and shots 60i. Since there is no tape the camera can record whatever it wants to.
 
I believe the HVX does do an upscale, hence the "anamorphic" style squeeze that appears in After Effects, etc. The image is 960x720, unsqueezed to 1280x720, but someone correct me on this if it's off base.

The HVX's images are scanned progressively on true progressive CCDs. Thus it's quite the opposite...interlaced images are NOT deinterlaced into progressive in the HVX, rather everything is scanned progressively and then interlaced if the format necessitates that (shooting to tape etc.).

Hope this helps (and is correct :) )
 
grahamdunn said:
I believe the HVX does do an upscale, hence the "anamorphic" style squeeze that appears in After Effects, etc. The image is 960x720, unsqueezed to 1280x720, but someone correct me on this if it's off base.
Click to expand...

The HVX does not do any kind of upscale. The image is captured and processed internally at 1920 x 1080. But then it does get downscaled for recording, depending on the format chosen: 1280 x 1080, 960 x 720, 720 x 480.
 
The HVX uses progressive chips, and only progressive. It can't even scan its chips interlaced.

It starts its whole process by scanning its chips at 1920x1080, at whatever frame rate you've selected. All internal processing is done at 1920x1080. If you're shooting standard-def DV at 480/60i, the HVX is actually working internally at 1920x1080@60P.

When it comes time to record, it will then downrez to whatever the appropriate recording format is.
 
You must log in or register to reply here.
Back
Top