AVC Intra Question at DVinfo.net
DV Info Net

Go Back   DV Info Net > High Definition Video Acquisition > AVCHD Format Discussion
Register FAQ Today's Posts Buyer's Guides

AVCHD Format Discussion
Inexpensive High Definition H.264 encoding to DVD, Hard Disc or SD Card.

Reply
 
Thread Tools Search this Thread
Old August 7th, 2006, 05:18 PM   #1
Major Player
 
Join Date: Jul 2003
Location: Warren, NJ
Posts: 398
AVC Intra Question

If the AVC-Intra format processes 1080i60 4:2:2 10-bit info at 50Mb/sec vs DVCProHD recording 1080i60 4:2:2 8-bit at 100Mb/sec, and Panasonic has a version of DVCProHD that record 720p24 4:2:2 8-bit at 40Mb/sec, does that mean a 720p24 AVC-Intra might be 20Mb/sec? If so, does that mean it may be possible to record it to DV tape?
David Ziegelheim is offline   Reply With Quote
Old August 7th, 2006, 05:25 PM   #2
Wrangler
 
Join Date: Oct 2003
Location: DFW area, TX
Posts: 6,117
Images: 1
Dave,

AVC-Intra is not the same as AVCHD. We have to be careful about intermixing the two terms here cause it could create lots of confusion.

-gb-
Greg Boston is offline   Reply With Quote
Old August 7th, 2006, 05:33 PM   #3
 
Join Date: Jan 2004
Location: Stockton, UT
Posts: 5,648
It's already creating lots of confusion in a different thread, I hope we can find our way to creating a forum specifically for AVC-I in the event it becomes a reality at some point. Very frustrating to keep reading posts about the "potential of AVC-I" in a discussion of a consumer format.
__________________
Douglas Spotted Eagle/Spot
Author, producer, composer
Certified Sony Vegas Trainer
http://www.vasst.com
Douglas Spotted Eagle is offline   Reply With Quote
Old August 7th, 2006, 06:40 PM   #4
Major Player
 
Join Date: Jul 2003
Location: Warren, NJ
Posts: 398
AVCHD and AVC-Intra are just different versions of the same spec. There are 7 profiles and a whole bunch of levels. Isn't AVC-HD either the Baseline or Extended level? AVC-Intra is probably Hi422. Both are probably level 4.

Just different version of the same spec. The P2 AVC announcement seems to just talk about AVC vs DVCProHD with a doubling of storage.

I am very confused about the bit rates of the different levels, however 1280x720@60 doesn't exist until level 3.2. 1920x1088@30 until level 4.
David Ziegelheim is offline   Reply With Quote
Old August 8th, 2006, 01:37 AM   #5
Obstreperous Rex
 
Join Date: Jan 2001
Location: San Marcos, TX
Posts: 27,366
Images: 513
Until there's actual hardware, this is all just pointless measurbating... as counterproductive as it is vigorous.

Meanwhile for Spot: obviously we'll need to run a separate AVC-I board, when the time is right (that is, when some kind of AVC-I product gets announced).
__________________
CH

Search DV Info Net | 20 years of DVi | ...Tuesday is Soylent Green Day!
Chris Hurd is offline   Reply With Quote
Old August 8th, 2006, 02:30 AM   #6
Major Player
 
Join Date: Jul 2003
Location: Warren, NJ
Posts: 398
I believe the chips and software exist. Well, HP/level 4 exists. The Hi422p standard was adopted 2 years ago; so hardware should exist. I think papers have been presented. The key may be what Barry Green said...AVC will replace all current recording formats in a very short time. A short enough time that it affects camera procurement planning.

Not counting processing speed issues, if Panasonic modifies its 720pN24 for the new format, will it be recordable on tape?

Last edited by David Ziegelheim; August 8th, 2006 at 03:37 AM.
David Ziegelheim is offline   Reply With Quote
Old August 8th, 2006, 07:09 AM   #7
Obstreperous Rex
 
Join Date: Jan 2001
Location: San Marcos, TX
Posts: 27,366
Images: 513
So far all versions of AVC recording media are tapeless.

The AVC format specification calls for recording to hard drive, optical disc or flash memory. Not tape.
__________________
CH

Search DV Info Net | 20 years of DVi | ...Tuesday is Soylent Green Day!
Chris Hurd is offline   Reply With Quote
Old August 8th, 2006, 04:55 PM   #8
Major Player
 
Join Date: Jul 2003
Location: Warren, NJ
Posts: 398
I didn't see media specified or referred to in any of the H.264 presentations...a lot of stuff on algorithms though. It is a sequential bit stream, it should store on any medIa capable of sequential storage at an adequate rate. It is also specified for over the wire transmission including video conferencing (replacing H.263) and video phones.

The thing that got me to start this thread was the possiblity of storing an H.264 version of Panasonics 720pN24 to standard, already in the camera, tape drive. That format is not in the standard though.
David Ziegelheim is offline   Reply With Quote
Old June 18th, 2007, 11:50 AM   #9
New Boot
 
Join Date: Dec 2006
Location: Mansfield, Texas
Posts: 18
AVCHD Format Discussion

I imagine that Focus Enhancements will most likely try to offer support for the codec in a future upgrade.
Jeffery Haas is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > High Definition Video Acquisition > AVCHD Format Discussion


 



All times are GMT -6. The time now is 07:16 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network