Name
Abstract | ||
|---|---|---|
A low delay audio coding scheme with good perceptual audio quality for a desired limited bit rate is presented. The proposed audio coding scheme is based on differential pulse code modulation (DPCM) and block companded (BC) quantization. Prediction is realized as a FIR filter in lattice structure. DPCM performs in feedback manner, therefore no transmission of prediction filter coefficients is needed. The incorporation of BC quantization in the DPCM relies on a prediction error recalculation scheme. The use of BC quantization in the DPCM allows to accurately follow the prediction error signal. This improves the perceptual audio quality significantly compared to a plain DPCM with an adaptive quantizer. An algorithmic delay below a half millisecond and an overhead of less than a half bit per sample is introduced due to the short fixed block length of the BC quantizer. Therefore, a real time bidirectional audio application is achievable. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/WIAMIS.2013.6616143 | Image Analysis for Multimedia Interactive Services |
Keywords | DocType | ISSN |
FIR filters,audio coding,compandors,differential pulse code modulation,linear predictive coding,DPCM,FIR filter,adaptive quantizer,algorithmic delay,audio quality,block companded quantization,block companding,differential pulse code modulation,lattice structure,limited bit rate,low delay audio coding scheme,prediction error recalculation scheme,prediction filter coefficients,real time bidirectional audio application,ultra low latency audio coding,Audio coding,block compander,linear predictive coding | Conference | 2158-5873 |
Citations | PageRank | References |
0 | 0.34 | 3 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Gediminas Simkus | 1 | 0 | 0.34 |
| Martin Halters | 2 | 0 | 0.34 |
| Udo Zölzer | 3 | 27 | 12.39 |