Pessoal, alguem que já trabalhou com voz, seja com bibliotecas prontas(speex, etc) e gostaria de prestar uma consultoria, favor entrar em contato.
Email: rafael@visact.com.br
fone: (48) 3239-2247 e 3239-2248
Fórum sobre desenvolvimento de sistemas embarcados: Hardware e Software, Tecnologias: Eletrônica digital e analógica, Microcontroladoras, Microprocessadores, Sistemas *NIX (Linux, BSD), Software embarcado Baremetal. Sem fins lucrativos.
Consultoria em Compressão e Descompressão de VOZ
Moderadores: 51, guest2003, Renie, gpenga
11 mensagens
• Página 1 de 1
Consultoria em Compressão e Descompressão de VOZ
por rafaelvg » 31 Jan 2008 17:09
- rafaelvg
- Nibble
- Mensagens: 52
- Registrado em: 16 Jul 2007 12:52
por EDSONCAN » 01 Fev 2008 06:16
Da uma olhada ve se isso ajuda.
Nunca mexi com LPC10, minha especialidade foi LZW - Lempel-Ziv-Welch
que no seu caso nao serve por ser um algoritimo que sai do principio que vc tem o arquivo pronto no momento da compressão.
SDS
Edson
U.S. Department of Defense
LPC-10 2400 bps Voice Coder
Release 1.5
October 1997
(Note that this release 1.5 is not from any "official" source. It is
from Andy Fingerhut. Contact information below.)
This package is available from:
http://www.arl.wustl.edu/~jaf/lpc/lpc10-1.5.tar.gz
New in release 1.5:
Just some minor fixes to sample applications "nuke" and "unnuke" that
caused them not to work correctly on compilers with 16 bit int's.
This was only a bug in the sample application code, not in the LPC-10
library itself.
NEW IN RELEASE 1.4!
You can now compress (or decompress) multiple audio streams
"simultaneously", by alternating the compression (or decompression) of
frames for each audio stream. Only the C version supports this
feature, but who really cared whether the Fortran version supported
this or not, eh?
Contents:
README - This file
README-1.0 - The original README file from Release 1.0
FAQ - Frequently Asked Questions items for LPC and CELP
lpc55 - modified Fortran code for LPC-10 Version 55
README - summary of modifications made
README.f2c - hints on installing f2c on some machines,
and notes on the f2c invocation options used
README.jaf - hints on using the LPC-10 coder from a C application
RCS - Revision Control System directory containing
master files for all sources, showing the steps
of changes that I made to the original 1.0 sources.
lpc55-C - Hand-modified C version of code, most of
which was created by running f2c on the
Fortran code in directory lpc55 above. I'm
fairly certain that the C code from the 1.0
release was out of date with respect to the
Fortran code, so it was not included in this
distribution.
data - Sample speech files, containing:
dam9.spd - Sample input speech file
dam9-out.spd - Speech processed by modified Fortran code.
This is identical to dam9_lpc55.spd from
release 1.0, except for 180 0 samples at the
beginning, and many samples here and there
that are off by 1, probably due to different
rounding of reals.
abtool_1.2 - Sun GUI tool for playing listening comparisons
between speech files (this is a beta version)
misc
bin - Several useful shell scripts for audio on Sun machines
README - Description of audio file formats
fortran-locals - Some files I made when determining whether local
variables in Fortran subroutines and functions
were like C "static" local variables or not.
gcc-2.6.0-bug - A program that demonstrates a bug in GCC 2.6.0
on the Solaris 2.4 machine siesta.cs.wustl.edu.
I don't know how widespread this problem is,
but it does have an unpleasant side effect if
GCC 2.6.0 is used to compile f2c.
See also the file README-1.0 for some other useful details.
Andy Fingerhut
Applied Research Laboratory <-- this line is optional if
Washington University, Campus Box 1045/Bryan 509 you have limited space
One Brookings Drive
Saint Louis, MO 63130-4899
jaf@arl.wustl.edu
http://www.arl.wustl.edu/~jaf/
Nunca mexi com LPC10, minha especialidade foi LZW - Lempel-Ziv-Welch
que no seu caso nao serve por ser um algoritimo que sai do principio que vc tem o arquivo pronto no momento da compressão.
SDS
Edson
U.S. Department of Defense
LPC-10 2400 bps Voice Coder
Release 1.5
October 1997
(Note that this release 1.5 is not from any "official" source. It is
from Andy Fingerhut. Contact information below.)
This package is available from:
http://www.arl.wustl.edu/~jaf/lpc/lpc10-1.5.tar.gz
New in release 1.5:
Just some minor fixes to sample applications "nuke" and "unnuke" that
caused them not to work correctly on compilers with 16 bit int's.
This was only a bug in the sample application code, not in the LPC-10
library itself.
NEW IN RELEASE 1.4!
You can now compress (or decompress) multiple audio streams
"simultaneously", by alternating the compression (or decompression) of
frames for each audio stream. Only the C version supports this
feature, but who really cared whether the Fortran version supported
this or not, eh?
Contents:
README - This file
README-1.0 - The original README file from Release 1.0
FAQ - Frequently Asked Questions items for LPC and CELP
lpc55 - modified Fortran code for LPC-10 Version 55
README - summary of modifications made
README.f2c - hints on installing f2c on some machines,
and notes on the f2c invocation options used
README.jaf - hints on using the LPC-10 coder from a C application
RCS - Revision Control System directory containing
master files for all sources, showing the steps
of changes that I made to the original 1.0 sources.
lpc55-C - Hand-modified C version of code, most of
which was created by running f2c on the
Fortran code in directory lpc55 above. I'm
fairly certain that the C code from the 1.0
release was out of date with respect to the
Fortran code, so it was not included in this
distribution.
data - Sample speech files, containing:
dam9.spd - Sample input speech file
dam9-out.spd - Speech processed by modified Fortran code.
This is identical to dam9_lpc55.spd from
release 1.0, except for 180 0 samples at the
beginning, and many samples here and there
that are off by 1, probably due to different
rounding of reals.
abtool_1.2 - Sun GUI tool for playing listening comparisons
between speech files (this is a beta version)
misc
bin - Several useful shell scripts for audio on Sun machines
README - Description of audio file formats
fortran-locals - Some files I made when determining whether local
variables in Fortran subroutines and functions
were like C "static" local variables or not.
gcc-2.6.0-bug - A program that demonstrates a bug in GCC 2.6.0
on the Solaris 2.4 machine siesta.cs.wustl.edu.
I don't know how widespread this problem is,
but it does have an unpleasant side effect if
GCC 2.6.0 is used to compile f2c.
See also the file README-1.0 for some other useful details.
Andy Fingerhut
Applied Research Laboratory <-- this line is optional if
Washington University, Campus Box 1045/Bryan 509 you have limited space
One Brookings Drive
Saint Louis, MO 63130-4899
jaf@arl.wustl.edu
http://www.arl.wustl.edu/~jaf/
- EDSONCAN
- Word
- Mensagens: 876
- Registrado em: 11 Out 2006 14:11
por msamsoniuk » 21 Fev 2008 13:38
pq vc nao comeca indo atras das implementacoes opensource p/ G726 e G729 ?
-
msamsoniuk - Dword
- Mensagens: 2935
- Registrado em: 13 Out 2006 18:04
por tcpipchip » 21 Fev 2008 15:24
Rafael
Eh um projeto pessoal ou para empresa ?
Voce entrou em contato comigo antes...."eu" fiz um projeto baseado no BEEEEEEEP que eh um Z80 com DSP (sera que eu fiz ??????, acho que desenhei e montei ne????)
Ele funcionou 100% com SIP e IAX2.
A qualidade de audio ficou fantastica com os CODEC...acho que ja testei com o JEAN F e SERGIO COSTA ele...
Funcionou com VOXFONE, VONO e TELLFREE....
A programacao peguei pronta (linguagem C estruturado)...fiz algumas modificacoes para atender alguns clientes, como exemplo, mandar um e-mail quando uma ligacao fosse encerrada...
Porem, a empresa (nao diferente da SRA NXP), pretende descontinuar o bixinho e similares...a nao ser que voce chegue a eles e faca uma compra programada boa...
Os codecs estao em .LIB, ok ?
Se voce tiver interesse, vendo o projeto que fiz no PCAD 2004.
T+
TCPIPCHIP
Eh um projeto pessoal ou para empresa ?
Voce entrou em contato comigo antes...."eu" fiz um projeto baseado no BEEEEEEEP que eh um Z80 com DSP (sera que eu fiz ??????, acho que desenhei e montei ne????)
Ele funcionou 100% com SIP e IAX2.
A qualidade de audio ficou fantastica com os CODEC...acho que ja testei com o JEAN F e SERGIO COSTA ele...
Funcionou com VOXFONE, VONO e TELLFREE....
A programacao peguei pronta (linguagem C estruturado)...fiz algumas modificacoes para atender alguns clientes, como exemplo, mandar um e-mail quando uma ligacao fosse encerrada...
Porem, a empresa (nao diferente da SRA NXP), pretende descontinuar o bixinho e similares...a nao ser que voce chegue a eles e faca uma compra programada boa...
Os codecs estao em .LIB, ok ?
Se voce tiver interesse, vendo o projeto que fiz no PCAD 2004.
T+
TCPIPCHIP
Editado pela última vez por tcpipchip em 26 Fev 2008 16:48, em um total de 1 vez.
-
tcpipchip - Dword
- Mensagens: 6560
- Registrado em: 11 Out 2006 22:32
- Localização: TCPIPCHIPizinho!
11 mensagens
• Página 1 de 1
Quem está online
Usuários navegando neste fórum: Nenhum usuário registrado e 1 visitante