24 Oct
2008
24 Oct
'08
5:17 a.m.
Hey gang, is there any good documentation on how to use libsox
on the net? i've been googling but nothing except the ubuntu man
pages cropped up?
------- -.-
1/f ))) --.
------- ...
http://www.algomantra.com
24 Oct
24 Oct
5:24 a.m.
On Fri, Oct 24, 2008 at 12:47 PM, AlgoMantra <algomantra(a)gmail.com> wrote:
Hey gang, is there any good documentation on how to
use libsox
on the net? i've been googling but nothing except the ubuntu man
pages cropped up?
Sorry to bother, I found something now:
http://sox.sourceforge.net/libsox.html
5:31 a.m.
AlgoMantra wrote:
Sorry to bother, I found something now:
http://sox.sourceforge.net/libsox.html
Also have a look at libsndfile:
http://www.mega-nerd.com/libsndfile/
Erik
--
-----------------------------------------------------------------
Erik de Castro Lopo
-----------------------------------------------------------------
"Using Java as a general purpose application development language
is like going big game hunting armed with Nerf weapons."
-- Author Unknown
6:02 a.m.
Also have a look at libsndfile:
http://www.mega-nerd.com/libsndfile/
Erik
--
Oh, great....this actually solves me a number of problems. Thanks a lot!
------- -.-
1/f ))) --.
------- ...
http://www.algomantra.com
28 Oct
28 Oct
8:21 p.m.
New subject: DAB Audio frame decoder
Hi all,
I would like to know if somebody of you knows a C/C++ library allowing to decode DAB audio
frame (commercial or not), specially to extract PAD components.
For your information, I'm working with the FxEngine Framework
(http://www.smprocess.com) on DAB MPEG 1 layer II audio format.
Thanks in advance,
Sylvain
8:43 p.m.
New subject: DAB Audio frame decoder
On Tuesday 28 October 2008 02:11:12 pm smprocess wrote:
I would like to know if somebody of you knows a C/C++
library allowing to
decode DAB audio frame (commercial or not), specially to extract PAD
components.
When you say 'DAB', I take it you're talking about Eureka-147 datastreams, not
the 'HD Radio' system in use in the USA? ('Cause HD Radio is not MPEG).
For your information, I'm working with the
FxEngine Framework
(http://www.smprocess.com) on DAB MPEG 1 layer II audio format.
Are these elemental streams? If so, then I assume the PAD is in the ancillary
channel?
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Chief Developer |
| | Paravel Systems |
|-------------------------------------------------------------------------|
| beta test, v: |
| To voluntarily entrust one's data, one's livelihood and one's |
| sanity to hardware or software intended to destroy all three. |
| In earlier days, virgins were often selected to beta test |
| volcanoes. |
|-------------------------------------------------------------------------|
29 Oct
29 Oct
6:18 a.m.
New subject: DAB Audio frame decoder
Hi Fred,
Yes, when I said 'DAB', I'm talking about Eureka-147, not DAB+ which defines
HE-AAC.
I know that DAB is obsolete, but I would like to use MPEG to create a 'audio
DAB kit' to my students courses.
However, a library allowing to decode all DAB audio formats would be
welcome.
The audio stream that I would like to decode is composed of MPEG frame + PAD
(ancillary data). Of course, I could separate both parts and decode them in
two process.
Because I didn't find API to do this, I think that I will do it my self.
Regards,
Sylvain
----- Original Message -----
From: "Fred Gleason" <fredg(a)paravelsystems.com>
To: <linux-audio-dev(a)lists.linuxaudio.org>rg>;
<linux-audio-user(a)lists.linuxaudio.org>
Sent: Wednesday, October 29, 2008 12:43 AM
Subject: Re: [LAD] DAB Audio frame decoder
On Tuesday 28 October 2008 02:11:12 pm smprocess
wrote:
I would like to know if somebody of you knows a
C/C++ library allowing to
decode DAB audio frame (commercial or not), specially to extract PAD
components.
When you say 'DAB', I take it you're talking about Eureka-147 datastreams,
not
the 'HD Radio' system in use in the USA? ('Cause HD Radio is not MPEG).
For your information, I'm working with the
FxEngine Framework
(http://www.smprocess.com) on DAB MPEG 1 layer II audio format.
Are these elemental streams? If so, then I assume the PAD is in the
ancillary
channel?
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Chief Developer
|
| | Paravel Systems
|
|-------------------------------------------------------------------------|
| beta test, v:
|
| To voluntarily entrust one's data, one's livelihood and one's
|
| sanity to hardware or software intended to destroy all three.
|
| In earlier days, virgins were often selected to beta test
|
| volcanoes.
|
|-------------------------------------------------------------------------|
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
10:17 a.m.
New subject: DAB Audio frame decoder
On Wednesday 29 October 2008 05:18:34 am smprocess wrote:
The audio stream that I would like to decode is
composed of MPEG frame +
PAD (ancillary data). Of course, I could separate both parts and decode
them in two process.
Because I didn't find API to do this, I think that I will do it my self.
I'd start by looking in the LibMad sources. Extracting the raw ancillary data
from L2 frames is pretty straightforward (unlike L3, where the bitstream must
be partially uncompressed first). Another doc that may be of some help is:
http://www.audioscience.com/internet/download/notes/note0001_MPEG_energy.pdf
Not PAD specific, but it does illustrate one technique for accessing the
ancillary channel.
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Chief Developer |
| | Paravel Systems |
|-------------------------------------------------------------------------|
| Fresco's Discovery: |
| If you knew what you were doing you'd probably be bored. |
|-------------------------------------------------------------------------|
10:51 a.m.
New subject: DAB Audio frame decoder
Fred,
It's exactly what I was thinking to do. In my case, decoding MPEG audio part
is easy. I have just to extract and to decode PAD now.
I found a book which explains the PAD part: "Digital Audio Broadcasting:
Principles and Applications".
Thank for your time.
Regards,
Sylvain
----- Original Message -----
From: "Fred Gleason" <fredg(a)paravelsystems.com>
To: "smprocess" <machel(a)smprocess.com>om>;
<linux-audio-dev(a)lists.linuxaudio.org>
Sent: Wednesday, October 29, 2008 2:16 PM
Subject: Re: [LAD] DAB Audio frame decoder
On Wednesday 29 October 2008 05:18:34 am smprocess
wrote:
The audio stream that I would like to decode is
composed of MPEG frame +
PAD (ancillary data). Of course, I could separate both parts and decode
them in two process.
Because I didn't find API to do this, I think that I will do it my self.
I'd start by looking in the LibMad sources. Extracting the raw ancillary
data
from L2 frames is pretty straightforward (unlike L3, where the bitstream
must
be partially uncompressed first). Another doc that may be of some help
is:
http://www.audioscience.com/internet/download/notes/note0001_MPEG_energy.pdf
Not PAD specific, but it does illustrate one technique for accessing the
ancillary channel.
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Chief Developer
|
| | Paravel Systems
|
|-------------------------------------------------------------------------|
| Fresco's Discovery:
|
| If you knew what you were doing you'd probably be bored.
|
|-------------------------------------------------------------------------| 
3 Nov
3 Nov
4:57 p.m.
New subject: DAB Audio frame decoder
hi,
smprocess schrieb:
Hi Fred,
Yes, when I said 'DAB', I'm talking about Eureka-147, not DAB+ which defines
HE-AAC.
I know that DAB is obsolete, but I would like to use MPEG to create a 'audio
DAB kit' to my students courses.
However, a library allowing to decode all DAB audio formats would be
welcome.
The audio stream that I would like to decode is composed of MPEG frame + PAD
(ancillary data). Of course, I could separate both parts and decode them in
two process.
Because I didn't find API to do this, I think that I will do it my self.
What about using GStreamer. There is mpegaudioparse element (mpeg audio
bitstream parser), Not sure about auxillary data. At least you'll get a
framework and can plugin in the part that is not there yet :)
Stefan
Regards,
Sylvain
----- Original Message -----
From: "Fred Gleason" <fredg(a)paravelsystems.com>
To: <linux-audio-dev(a)lists.linuxaudio.org>rg>;
<linux-audio-user(a)lists.linuxaudio.org>
Sent: Wednesday, October 29, 2008 12:43 AM
Subject: Re: [LAD] DAB Audio frame decoder
On Tuesday 28 October 2008 02:11:12 pm smprocess
wrote:
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev I would like to know if somebody of you knows a
C/C++ library allowing to
decode DAB audio frame (commercial or not), specially to extract PAD
components.
When you say 'DAB', I take it you're talking about
Eureka-147 datastreams,
not
the 'HD Radio' system in use in the USA? ('Cause HD Radio is not MPEG).
For your information, I'm working with the
FxEngine Framework
(http://www.smprocess.com) on DAB MPEG 1 layer II audio format.
Are these
elemental streams? If so, then I assume the PAD is in the
ancillary
channel?
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Chief Developer
|
| | Paravel Systems
|
|-------------------------------------------------------------------------|
| beta test, v:
|
| To voluntarily entrust one's data, one's livelihood and one's
|
| sanity to hardware or software intended to destroy all three.
|
| In earlier days, virgins were often selected to beta test
|
| volcanoes.
|
|-------------------------------------------------------------------------|
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
5 Nov
5 Nov
1:35 p.m.
New subject: DAB Audio frame decoder
Hi Stefan,
It's an interesting other solution.
Thanks,
Sylvain
----- Original Message -----
From: "Stefan Kost" <ensonic(a)hora-obscura.de>
To: "smprocess" <machel(a)smprocess.com>
Cc: <linux-audio-dev(a)lists.linuxaudio.org>rg>;
<linux-audio-user(a)lists.linuxaudio.org>
Sent: Monday, November 03, 2008 9:57 PM
Subject: Re: [LAD] DAB Audio frame decoder
hi,
smprocess schrieb:
Hi Fred,
Yes, when I said 'DAB', I'm talking about Eureka-147, not DAB+ which
defines
HE-AAC.
I know that DAB is obsolete, but I would like to use MPEG to create a
'audio
DAB kit' to my students courses.
However, a library allowing to decode all DAB audio formats would be
welcome.
The audio stream that I would like to decode is composed of MPEG frame +
PAD
(ancillary data). Of course, I could separate both parts and decode them
in
two process.
Because I didn't find API to do this, I think that I will do it my self.
What about using GStreamer. There is mpegaudioparse element (mpeg audio
bitstream parser), Not sure about auxillary data. At least you'll get a
framework and can plugin in the part that is not there yet :)
Stefan
Regards,
Sylvain
----- Original Message -----
From: "Fred Gleason" <fredg(a)paravelsystems.com>
To: <linux-audio-dev(a)lists.linuxaudio.org>rg>;
<linux-audio-user(a)lists.linuxaudio.org>
Sent: Wednesday, October 29, 2008 12:43 AM
Subject: Re: [LAD] DAB Audio frame decoder
On Tuesday 28 October 2008 02:11:12 pm smprocess
wrote:
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev I would like to know if somebody of you knows a
C/C++ library allowing
to
decode DAB audio frame (commercial or not), specially to extract PAD
components.
When you say 'DAB', I take it you're talking about
Eureka-147
datastreams,
not
the 'HD Radio' system in use in the USA? ('Cause HD Radio is not MPEG).
For your information, I'm working with the
FxEngine Framework
(http://www.smprocess.com) on DAB MPEG 1 layer II audio format.
Are these
elemental streams? If so, then I assume the PAD is in the
ancillary
channel?
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Chief Developer
|
| | Paravel Systems
|
|-------------------------------------------------------------------------|
| beta test, v:
|
| To voluntarily entrust one's data, one's livelihood and one's
|
| sanity to hardware or software intended to destroy all three.
|
| In earlier days, virgins were often selected to beta test
|
| volcanoes.
|
|-------------------------------------------------------------------------|
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
5655
days inactive
5667
days old
linux-audio-dev@lists.linuxaudio.org
10 comments
5 participants
participants (5)
-
AlgoMantra -
Erik de Castro Lopo -
Fred Gleason -
smprocess -
Stefan Kost