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Multimode Tree Coding of Speech with Perceptual Pre-Weighting and Post-Weighting
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ramadas, Pravin Li, Ying-Yi Gibson, Jerry D. |
| Copyright Year | 2010 |
| Abstract | A low delay and low complexity speech coder based on Multimode Tree Coding is proposed. In our Multimode Tree Coder, a simple mode classification method along with frame energy are used to classify the input speech frames into five different modes. Each mode is coded at a suitable bit-rate using a Tree coder with computationally efficient perceptual error pre-weighting and post-weighting filters, and a G.727 Code Generator. At an average bit-rate about 12 kbps for 50% Voice Activity sequences, the variable rate Multimode Tree Coder produces speech quality equivalent to the G.727 ADPCM coder at 32 kbps, resulting in nearly 63% bit-rate saving. Apart from bit-rate savings, a low delay of 6.125 ms, and low complexity are achieved by our Multimode Tree Coder, making it an interesting alternative to the AMR-NB Codec. |
| File Format | PDF HTM / HTML |
| DOI | 10.2316/P.2010.710-060 |
| Alternate Webpage(s) | http://vivonets.ece.ucsb.edu/Ying_Yi_SIP.pdf |
| Alternate Webpage(s) | https://doi.org/10.2316/P.2010.710-060 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
