bit rate and resolution at DVinfo.net

Go Back   DV Info Net > High Definition Video Acquisition > AVCHD Format Discussion

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


Reply
 
Thread Tools Search this Thread
Old February 4th, 2008, 10:14 AM   #1
Tourist
 
Join Date: Jan 2008
Location: Raleigh, NC
Posts: 1
bit rate and resolution

My Sony HDR-SR7 has four options for HD recording quality: XP (with a bit rate of 15 Mbps), HQ (9 Mbps), SP (default, 7 Mbps), or LP (5 Mbps). How do these options correspond to resolution (width and height in pixels)?

All the clips I've shot so far were done at default quality. My video editing software (Final Cut Express 4) says the frame size is 1440x1080, which is the max for this Sony model (although I understand that models coming out later this year will be 1920x1080).

So if the frame size is already maximized, what do you gain from recording at a higher bit rate? Clearly, you lose out on hard drive space at such higher qualities.

Thanks in advance.
Keith Symmers is offline   Reply With Quote
Old February 4th, 2008, 12:24 PM   #2
Inner Circle
 
Join Date: Feb 2007
Location: Apple Valley CA
Posts: 4,866
while width and height remain the same... the bitrate determines how accurately that field of pixels will be recorded. The lower the bitrate, the more you'll notice macroblocking type artifacts. Basically, the more data/information per frame, the better it will be recorded/reproduced, less data/lower bitrate, the worse the result will look.
Dave Blackhurst 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...

Professional Video
(800) 833-4801
Portland, OR

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

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

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

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 06:08 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network