| Paper: | AE-P6.6 | ||
| Session: | Audio for Multimedia and Networks | ||
| Time: | Friday, May 21, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Audio and Electroacoustics: Network Audio | ||
| Title: | FINE-GRANULAR SCALABLE AND ERROR RESILIENT AUDIO CODING BY TREE-STRUCTURED QUANTIZATION | ||
| Authors: | Stian Johansen; Norwegian University of Science and Technology | ||
| Andrew Perkis; Norwegian University of Science and Technology | |||
| Tor Audun Ramstad; Norwegian University of Science and Technology | |||
| Ajit Shyamsunder Bopardikar; Norwegian University of Science and Technology | |||
| Abstract: | This paper presents a scheme for scalable, errorresilient coding of audio signals. The scheme is implemented hereas part of a subband-based audio codec and involves the union oftwo interconnected ideas: Tree-structured vector quantization(TSVQ) and reallocation of bits (RoB). The former ensures that the encoding procedure results in fixed-length codes while the latter is a low-complexity scaling algorithm that computes optimal bitrates for each subband when the bitstream needs to bedownscaled to a lower bitrate. The functionality enabled by thesetwo systems assumes great importance when the encoded material is to be delivered over channels and networks that have a time-varying bitrate, such as IP-based wireless networks. Suchchannels are often error-prone and the potentially debilitatingeffects of introduced errors are mitigated by the inherentfixed-length property of all codewords. We present results thathighlight the performance of this system under noisy conditionsand show that the degradation in quality is graceful. | ||
| Back | |||
Home -||-
Organizing Committee -||-
Technical Committee -||-
Technical Program -||-
Plenaries
Paper Submission -||-
Special Sessions -||-
ITT -||-
Paper Review -||-
Exhibits -||-
Tutorials
Information -||-
Registration -||-
Travel Insurance -||-
Housing -||-
Workshops