[bookport] Re: A few questions and thoughts about audio filecompression
- From: "Donna Slater" <donna.slater@xxxxxxxxxx>
- To: <bookport@xxxxxxxxxxxxx>
- Date: Wed, 29 Sep 2004 15:14:54 +0100
Hi
Thanks for your reply. I totally accept what you say, it was purely a stray
thought on my part.
Thanks again
Donna
----- Original Message -----
From: "ROB MEREDITH" <rmeredith@xxxxxxx>
To: <bookport@xxxxxxxxxxxxx>
Sent: Wednesday, September 29, 2004 2:50 PM
Subject: [bookport] Re: A few questions and thoughts about audio
filecompression
> Donna:
>
> Compressed files are reencoded at the same bit rate as the original. There
=
> are various reasons for this; I actually wanted to move up to a slightly =
> higher bit rate in some situations, but that was not feasible.
>
> In short, our stuff works best if we reencode at the same bit rate. =
> Believe me, if we stepped down the bit rate, it would just make the file =
> sound worse in most situations. For example, you might move from 32,000 to
=
> 24,000, a serious downgrade.
>
> Finally, remember that you are actually reencoding the file, so some =
> quality loss, never a gain, is inevitable.
>
> As for battery usage, I just plain don't know. I think there is a =
> difference, but how much is beyond me!
>
> Rob Meredith
>
> >>> donna.slater@xxxxxxxxxx 09/29/04 05:36AM >>>
> Hi
>
> I'm just curious, but when a file gets compressed so that it plays faster
=
> on
> the Bookport, is it re-encoded at the same bit rate as the original file =
> or
> is a lower bit rate used? If it is re-encoded at the same bit rate, would
> it be very complicated to give the user an option to encode at a lower bit
> rate, so using less space on the card? Also, does the bit rate of a file
> have any effect on the amount of battery usage needed to process the file?
> I guess what I am wondering is if a lower bit rate uses less battery =
> power?
>
> Thanks once again for such a great list.
>
> Donna Slater
>
>
>
>
>
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- » [bookport] Re: A few questions and thoughts about audio filecompression
