XiphWiki - User contributions [en]

Speex

2011-10-10T21:23:45Z

VTowery39: None

= Website =

The [http://www.speex.org/ Speex homepage] has all the project info.

== Hardware ==

See [[Speex hardware]] for a partial list of supported hardware

== Tasks ==

These are some improvements that could be made to Speex. Let[http://thoughtmechanics.com/ web design company in atlanta]know [http://thoughtmechanics.com/ atlanta georgia web design] if you'd like to work on one of them.

* Speech/signal processing (DSP design)
** Improve noise suppression (get rid of musical noise) and residual echo suppression
** Improve packet-loss concealment (PLC)
** Re-write the built-in voice activity detector (VAD)
** Improve the 2.15 kbps vocoder mode (there are even 4 unused bits left to use)
** Algorithmic optimizations (see if some searches can be simplified/approximated)

* Complete fixed-point (DSP development)
** Wideband
** VBR
** Rest of the narrowband modes
** Preprocessor (noise suppression, AGC)
** Jitter buffer
** Arch-specific optimization
** More...

* Tune (playing with parameters)
** Noise weighting filter
** Perceptual enhancement

* Features (plain C programming)
** Implement maximum VBR bit-rate
** Implement peeling (write functions to strip some of the bits)
*** Peel high-band (wideband -> narrowband)
*** Transform 24.6 kbps mode to 15 kbps mode

* Documentation
** Use questions from the mailing list to create a better FAQ on the wiki
** Update the Speex manual based on recent papers
** Improve libspeex documentation
** Write good example code

== External links ==

* [[Wikipedia: Speex]]

[[Category:Speex]]

Vorbis Hardware

2011-10-10T21:22:55Z

VTowery39: None

This is a list of hardware of all categories, from chipsets to ready-to-use products, that support Ogg [[Vorbis]].

Hardware support status for Ogg Vorbis is relatively good, you can choose between a huge number of mobile flash players, many HDD based players and a respectable number of Hi-Fi [http://www.thoughtmechanics.com/ web design firms atlanta] components. More than 50 different companies offer a total of more than a hundred products for virtually every application, there is even a knife that can play Ogg Vorbis now ;-). If you can't find a suitable player come back next week -- new products are added on a weekly basis, as many companies are working to support Vorbis on their hardware.

If you know of any hardware or projects that are not yet mentioned here, please add them to the list.

== Consumer products ==

The following music players support Ogg Vorbis either out of the box or after a firmware upgrade:

* [[PortablePlayers|Portable players (mobile players)]]:
:[[PortablePlayers/Flash|Flash Memory Storage]]
:[[PortablePlayers/Harddisk|Harddisk Storage]]
:[[PortablePlayers/Others#CD.2FDVD_Audio_Players|CD/DVD Audio Players]]
:[[PortablePlayers/Others#Mobile_Phones|Mobile Phones]]
:[[PortablePlayers/Others#Others|Others]]
* [[StaticPlayers|Static players (installed players)]]:
:[[StaticPlayers#Hi-Fi_components|Hi-Fi components]]
:[[StaticPlayers#Car_Audio|Car Audio]]
:[[StaticPlayers#Media_Storage|Media Storage]]

For hardware that is able to run third-party software (such as PDAs and video game consoles), please visit [[VorbisSoftwarePlayers]].

== Non-consumer products ==

This is Vorbis in Silicon, meaning chips from which actual consumer products can be built.

;[http://www.vlsi.fi/ VLSI Solution Oy]: VLSI provides two Ogg Vorbis capable chips.

:[http://www.vlsi.fi/en/products/vs1000.shtml VS1000] is an Ogg Vorbis decoder and controller chip based on a 16-bit DSP.

:[http://www.vlsi.fi/en/products/vs1053.shtml VS1053] is a low-power "MP3 decoder" chip based on the same DSP. What makes the IC unique is that it can both decode and [http://www.vlsi.fi/en/support/software/vs10xxapplications.html encode] Ogg Vorbis files. There are several different quality settings to choose from varying from narrowband speech to high-quality stereo music.

;[http://oggonachip.sourceforge.net/ Ogg On A Chip]: A hardware/software implementation with a good report showing how to make FPGAs and the like to decode Vorbis streams.

;[http://www.finearch.com/english FineArch]: FineArch, Inc. developed a hardware core and control software for decoding Vorbis. This technology can be integrated into portable players or cell phones, and since it runs at only 12MHz, it uses very little battery power. It supports files up to 64Kb/s, but could be scaled to 16MHz and 128Kb/s, at the expense of battery life. For more information, see FineArch’s [http://www.finearch.com/english/news/pr_20030715/pr_20030715.htm press release].

;[http://www.mcslogic.com/ MCS Logic]: MCS Logic creates single chip decoders that can play Ogg Vorbis. They supply the Vorbis decoding chips for Havin and Freemax.

;[http://www.telechips.com Telechips]: Telechips has developed the TCC72x, a single chip decoder that can play Vorbis. The TCC72x series is based on on an ARM940T core, and it is used widely in Korea for players such as Iops or MobiBlu.

;[http://www.tamulsite.co.kr Tamul Multimedia]: Tamul Multimedia manufactures decoding chips for Samsung. They claim they have Ogg Vorbis decoding firmware, according to [http://www.dt.co.kr/print.html?gisaid=2003031002011367704002 The Digital Times] (Korean).

;[http://www.sigmatel.com/ SigmaTel]: SigmaTel makes several chips which support Ogg Vorbis decoding. After this quote years ago, we knew it was only a matter of time:
<blockquote>"I talked to Deborah Clark, product marketing engineer for audio chipmaker Sigmatel out of Austin, Tex. She is the company's expert in audio decoders. She says there is a growing base of support for Ogg Vorbis. "We can't keep paying these high licensing fees for this. Manufacturers would flock to something that's free." </blockquote>
:from a 2000 [http://www.forbes.com/2000/09/18/dvorak_index.html column in Forbes]

:Some STMP3500-based devices supports Ogg Vorbis, but there are no notes about this on SigmaTel-website.

:SigmaTel introduces the STMP3600 with support for Ogg Vorbis, MP3, AAC, WMA and more.[http://www.finanznachrichten.de/nachrichten-2005-10/artikel-5493211.asp]

== See also ==
* [[Theora Hardware]]

[[Category:Vorbis]]

WhatHappened

2011-10-10T21:22:07Z

VTowery39: None

{{historical}}

We used to have a Zope-based wiki here, but when our hosting imploded in the spring of 2004, we unfortunately lost
all of the content. We re-instated the website as a MediaWiki, which unfortunately doesn't do ReST, but has other
nice features. Thanks to j^ for installing it for us.

Anyway, please help repopulate.

A site that could help with repopulating is[http://www.thoughtmechanics.com/ web design company atlanta] [http://thoughtmechanics.com/ web design atlanta ga] Access this URL to get archived versions of the old Wiki: 'http://web.archive.org/*/http://wiki.xiph.org' Please note that in some cases, links such as 'http://web.archive.org/*/http://wiki.xiph.org/FrontPage' or 'http://web.archive.org/*/http://wiki.xiph.org/FrontPage/editform' might work better. (Adjust as neccessary.)