Yes I think something like 800 bit/s is possible at roughly the same quality using Vector Quantisation of the LSPs. However this wouldn't be robust to channel errors.
- DAvid On Wed, 2013-04-17 at 21:39 +0200, Netzblockierer wrote: > Hi, > > just asking: Besides, as Codec2 is a Multiband-Exitation-Codec, I'm > interested to know whether there can be even lower bandwiths achieved. > Of course, this may increase encoder and decoder complexity, but when > looking on ultra-narrowband - applilications, I only found a very few > competitors: > * TWELP (seems patent pending) > * MELPe (Thales has patent on the 600 bit/s version. all higher > bandwiths are partly patented by other companies, like TI, > Microsoft, etc. ... The Thales patent has been granted in 2005 > - so until 2030 it's out of reach...) > * Two propietary encoders from DSP Innovators inc. - working > with 600 and 800 bit/s > http://dspini.com/index.php?com=page&sec=products, which are > claimed patent-free and royality-free... > > I just read a while ago that there has been a testing on packet/frame > loss... It resulted in two typed of bits... One called ''Wo_E'' or > somelike that that are about 800 somewhat bit/s ... I suggested to try > what happens if all bits except these are ''lost''/ignored... Has > anyone tried it, and if, what are the results??? > > > Greetings, > Netzblockierer > > > ------------------------------------------------------------------------------ > Precog is a next-generation analytics platform capable of advanced > analytics on semi-structured data. The platform includes APIs for building > apps and a phenomenal toolset for data science. Developers can use > our toolset for easy data analysis & visualization. Get a free account! > http://www2.precog.com/precogplatform/slashdotnewsletter > _______________________________________________ Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
