Abstract
In Voice over IP, typical Forward Error Correction (FEC) schemes to combat packet loss allocate an equal amount of error-control resources to each voice packet, regardless of the perceptual importance of a packet. Recognizing the unequal perceptual importance of voice packets, we propose signal-adaptive unequal error protection methods in which certain packets are allocated more error-control resources than others. In particular, the amount of error protection provided to a packet is determined through an analysis by expected decoder synthesis paradigm ensconced within a rate-distortion Lagrangian optimization framework. Therefore, the sender evaluates various protection policies by anticipating the behavior of the decoder's Packet Loss Concealment (PLC) algorithm for various loss event probabilities. In this manner, perceptually critical voice packets that cannot be easily replaced by a PLC are provided with greater error protection. For a given average bit-rate, a simple unequal error protection scheme provides a 0.2 to 0.3 advantage in PESQ-MOS over the conventional equal error control schemes.
| Original language | English (US) |
|---|---|
| Title of host publication | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
| Volume | 5 |
| State | Published - 2004 |
| Event | Proceedings - IEEE International Conference on Acoustics, Speech, and Signal Processing - Montreal, Que, Canada Duration: May 17 2004 → May 21 2004 |
Other
| Other | Proceedings - IEEE International Conference on Acoustics, Speech, and Signal Processing |
|---|---|
| Country | Canada |
| City | Montreal, Que |
| Period | 5/17/04 → 5/21/04 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Signal Processing
- Acoustics and Ultrasonics
Cite this
Optimized unequal error protection for voice over IP. / Chen, Mingyu; Murthi, Manohar.
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. Vol. 5 2004.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Optimized unequal error protection for voice over IP
AU - Chen, Mingyu
AU - Murthi, Manohar
PY - 2004
Y1 - 2004
N2 - In Voice over IP, typical Forward Error Correction (FEC) schemes to combat packet loss allocate an equal amount of error-control resources to each voice packet, regardless of the perceptual importance of a packet. Recognizing the unequal perceptual importance of voice packets, we propose signal-adaptive unequal error protection methods in which certain packets are allocated more error-control resources than others. In particular, the amount of error protection provided to a packet is determined through an analysis by expected decoder synthesis paradigm ensconced within a rate-distortion Lagrangian optimization framework. Therefore, the sender evaluates various protection policies by anticipating the behavior of the decoder's Packet Loss Concealment (PLC) algorithm for various loss event probabilities. In this manner, perceptually critical voice packets that cannot be easily replaced by a PLC are provided with greater error protection. For a given average bit-rate, a simple unequal error protection scheme provides a 0.2 to 0.3 advantage in PESQ-MOS over the conventional equal error control schemes.
AB - In Voice over IP, typical Forward Error Correction (FEC) schemes to combat packet loss allocate an equal amount of error-control resources to each voice packet, regardless of the perceptual importance of a packet. Recognizing the unequal perceptual importance of voice packets, we propose signal-adaptive unequal error protection methods in which certain packets are allocated more error-control resources than others. In particular, the amount of error protection provided to a packet is determined through an analysis by expected decoder synthesis paradigm ensconced within a rate-distortion Lagrangian optimization framework. Therefore, the sender evaluates various protection policies by anticipating the behavior of the decoder's Packet Loss Concealment (PLC) algorithm for various loss event probabilities. In this manner, perceptually critical voice packets that cannot be easily replaced by a PLC are provided with greater error protection. For a given average bit-rate, a simple unequal error protection scheme provides a 0.2 to 0.3 advantage in PESQ-MOS over the conventional equal error control schemes.
UR - http://www.scopus.com/inward/record.url?scp=4544353563&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4544353563&partnerID=8YFLogxK
M3 - Conference contribution
VL - 5
BT - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ER -