Trellis Based Approach for Joint Optimization of Window Switching Decisions and Bit Resource Allocation

Melkote V, Rose K. Trellis Based Approach for Joint Optimization of Window Switching Decisions and Bit Resource Allocation. In: AES Convention 123. Audio Engineering Society; 2007. Paper 7216. Available from: https://aes.org/publications/elibrary-page/?id=14274

@inproceedings{Melkote2007_14274,
  author = {Melkote, Vinay and Rose, Kenneth},
  title = {{Trellis Based Approach for Joint Optimization of Window Switching Decisions and Bit Resource Allocation}},
  booktitle = {AES Convention 123},
  note = {Paper 7216},
  year = {2007},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14274}
}

TY  - CPAPER
TI  - Trellis Based Approach for Joint Optimization of Window Switching Decisions and Bit Resource Allocation
AU  - Melkote, Vinay
AU  - Rose, Kenneth
T2  - AES Convention 123
M1  - Paper 7216
PY  - 2007
DA  - 2007/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14274
PB  - Audio Engineering Society
LA  - en
AB  - The fact that audio compression for streaming or storage is usually performed offline alleviates traditional constraints on encoding delay. We propose a rate-distortion optimized approach, within the MPEG Advanced Audio Coding framework, to trade delay for optimal window switching and resource allocation across frames. A trellis is constructed where stages correspond to audio frames, nodes represent window choices, and branches implement transition constraints. A suitable cost, comprising bit consumption and psycho-acoustic distortion, is optimized via multiple passes through the trellis until the desired bit-rate is achieved. The procedure offers optimal window switching as well as better bit distribution than conventional bit-reservoir schemes that are restricted to only ``borrow' bits from past frames. Objective and subjective tests show considerable performance gains.
ER  -