Tremor: Difference between revisions
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Tremor is a fixed-point version of the Ogg Vorbis decoder for those platforms that can't do floating point math. | Tremor is a fixed-point version of the Ogg Vorbis decoder for those platforms that can't do floating point math. | ||
The changing faces of Technology: | |||
A category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls. For users who have free, or fixed-price Internet access, Internet telephony software essentially provides free telephone calls anywhere in the world. To date, however, Internet telephony does not offer the same quality of telephone service as direct telephone connections. | |||
There are many Internet telephony applications available. Some, like CoolTalk and NetMeeting, come bundled with popular Web browsers. Others are stand-alone products. Internet telephony products are sometimes called IP telephony, Voice over the Internet (VOI) or Voice over IP (VOIP) products. | |||
Interent Technology Links: | |||
* [http://www.voip-guide.org/internet-telephony.php Internet Telephony] | |||
* [http://www.voip-guide.org/ VoIP] | |||
* [http://www.predictive-dialers.org/voip.php VOIP] | |||
* [http://www.software-engine.org/bpo-software.php BPO] | |||
* [http://www.predictive-dialers.org/crm.php CRM] | |||
== Texas Instruments TMS320C55x DSP Family == | == Texas Instruments TMS320C55x DSP Family == | ||
Revision as of 23:57, 23 January 2005
Tremor is a fixed-point version of the Ogg Vorbis decoder for those platforms that can't do floating point math.
The changing faces of Technology:
A category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls. For users who have free, or fixed-price Internet access, Internet telephony software essentially provides free telephone calls anywhere in the world. To date, however, Internet telephony does not offer the same quality of telephone service as direct telephone connections. There are many Internet telephony applications available. Some, like CoolTalk and NetMeeting, come bundled with popular Web browsers. Others are stand-alone products. Internet telephony products are sometimes called IP telephony, Voice over the Internet (VOI) or Voice over IP (VOIP) products.
Interent Technology Links:
Texas Instruments TMS320C55x DSP Family
Download the generic lowmem source using Subversion. This is probably the version you want to start working with for a DSP.
svn co http://svn.xiph.org/branches/lowmem-branch/Tremor/
There is also a no-byte branch for platforms whose smallest data unit is larger than 8 bits.
Required / Suggested Changes to the code as downloaded:
- Roland Wintersteller's various fixes
See the mailing list entry
- Johannes Sandvall's performance improvements
See the mailing list entry or just download
- alloca removal
The TI compiler does not support this.
- misc compiler warning fixes
- hooks to TI DSPLIB functions cfft3216_NOSCALE and cbrev32
These are part of the TI DSPLIB which can be downloaded from the TI website.
- 64-bit math functions
- converting all ints assumed to be 32 bits to ogg_int32_t
Links
- Tremor Mailing List - lots of info here, but have to wade through a lot!