IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
Anything new in the rumor mill about Apple and HD-AAC?
jkauff
post Jan 9 2013, 14:06
Post #1





Group: Members (Donating)
Posts: 161
Joined: 1-October 01
From: Doylestown, PA
Member No.: 145



Here it is a new year, and I haven't heard any updates to last year's rumor that Apple would be adopting HD-AAC for the iTunes Store and would start to offer lossless and/or hi-res downloads. If the rumored Pandora-killer iRadio happens, would that likely be the driver for HD-AAC?

WAGs also welcome. wink.gif
Go to the top of the page
+Quote Post
saratoga
post Jan 9 2013, 16:14
Post #2





Group: Members
Posts: 4924
Joined: 2-September 02
Member No.: 3264



Why would you want a scalable to lossless streaming format?
Go to the top of the page
+Quote Post
Kohlrabi
post Jan 9 2013, 16:54
Post #3





Group: Super Moderator
Posts: 1028
Joined: 12-March 05
From: Kiel, Germany
Member No.: 20561



Why would you want a hi-res streaming format?

This post has been edited by Kohlrabi: Jan 9 2013, 16:54


--------------------
Ceterum censeo Masterdiskem esse delendam.
Go to the top of the page
+Quote Post
skamp
post Jan 9 2013, 16:56
Post #4





Group: Developer
Posts: 1430
Joined: 4-May 04
From: France
Member No.: 13875



Why do you guys assume anything about the OP's motivations?


--------------------
See my profile for measurements, tools and recommendations.
Go to the top of the page
+Quote Post
db1989
post Jan 9 2013, 17:01
Post #5





Group: Super Moderator
Posts: 5275
Joined: 23-June 06
Member No.: 32180



Why is it apparently so difficult to read words?
QUOTE (jkauff @ Jan 9 2013, 13:06) *
lossless and/or hi-res downloads

Edit: OK, the mention of iRadio is irrelevant, since I doubt many stations are already at the upper limits of non-‘HD’ AAC or any other contemporary streaming format. But it’s a perfectly valid question in the context of downloads.

This post has been edited by db1989: Jan 9 2013, 17:04
Go to the top of the page
+Quote Post
jkauff
post Jan 9 2013, 18:38
Post #6





Group: Members (Donating)
Posts: 161
Joined: 1-October 01
From: Doylestown, PA
Member No.: 145



The advantage of HD-AAC is that you can store a song once in a hi-res (up to 24/192) compressed lossless format, similar to FLAC, ALAC, etc., and use the same file to extract lossy AAC (like the current iTunes) for downloading or streaming, or lossless standard 16/44. The advantage for the iTunes Store is that they could use the same file to satisfy all consumer uses.

The advantage for consumers like us is no more transcoding. You store the file once, and the player simply requests the slices that it is capable of playing. Same with applications. You could archive the songs on your computer, connect your iPhone/iPod, and ask iTunes to transfer the appropriate slices to your portable device in the size and quality you want to carry with you. You could say "Give me 50GB worth of my entire collection", and iTunes would do the math for you.

HD-AAC, if it became a standard, would be great for home music servers, too. You store the file on your server at its native resolution, and then any compatible device can request a stream at the highest bitrate and quality that it can handle. From what I've read, the compression ratio of HD-AAC is also higher than FLAC, so you can store more music in the same amount of space.

This post has been edited by jkauff: Jan 10 2013, 06:30
Go to the top of the page
+Quote Post
db1989
post Jan 9 2013, 19:21
Post #7





Group: Super Moderator
Posts: 5275
Joined: 23-June 06
Member No.: 32180



Assuming the compression was still efficient despite the scalability – and, more importantly, assuming those great benefits weren’t monopolised by Apple – that would be great.
Go to the top of the page
+Quote Post
LithosZA
post Jan 9 2013, 19:23
Post #8





Group: Members
Posts: 195
Joined: 26-February 11
Member No.: 88525



Question is if a bitrate peeled LC-AAC compatible file from a HD-AAC file would be comparible quality to a LC-AAC encoded file?
128Kbit/s peeled files vs 128Kbps/s normal encoded files...

EDIT: Bitrate peeling probably isn't the right term to use for HD-AAC.

This post has been edited by LithosZA: Jan 9 2013, 19:31
Go to the top of the page
+Quote Post
darkbyte
post Jan 9 2013, 19:35
Post #9





Group: Members
Posts: 151
Joined: 14-June 11
Member No.: 91517



There were some rumors about the Fraunhofer AAC encoder in Winamp which will support HD-AAC encoding. However i haven't heard anything about this since then. sad.gif

This post has been edited by darkbyte: Jan 9 2013, 19:37


--------------------
Wavpack -b450x1c
Go to the top of the page
+Quote Post
Kohlrabi
post Jan 10 2013, 12:40
Post #10





Group: Super Moderator
Posts: 1028
Joined: 12-March 05
From: Kiel, Germany
Member No.: 20561



QUOTE (db1989 @ Jan 9 2013, 17:01) *
Why is it apparently so difficult to read words?
QUOTE (jkauff @ Jan 9 2013, 13:06) *
lossless and/or hi-res downloads

FWIW, my question also applies to downloads.


--------------------
Ceterum censeo Masterdiskem esse delendam.
Go to the top of the page
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 1st September 2014 - 15:31