Log area ratio
 | This article needs additional citations for verification. (August 2025) |
Log area ratios (LAR) can be used to represent reflection coefficients (another form for linear prediction coefficients)[1] for transmission over a channel.[2] While not as efficient as line spectral pairs (LSPs), log area ratios are much simpler to compute. Let be the kth reflection coefficient of a filter, the kth LAR is:[3]
Use of Log Area Ratios have now been mostly replaced by Line Spectral Pairs, but older codecs, such as GSM-FR use LARs.
See also
[edit]References
[edit]- ^ Chow, David; Abdulla, Waleed (January 2004). "Speaker Identification Based on Log Area Ratio and Gaussian Mixture Models in Narrow-Band Speech: Speech Understanding / Interaction". Lecture Notes in Computer Science. 3157: 901–908 – via ResearchGate.
- ^ Strube, H. (October 1977). "Synthesis part of a "Log area ratio" vocoder in analog hardware". IEEE Transactions on Acoustics, Speech, and Signal Processing. 25 (5): 387–391. doi:10.1109/TASSP.1977.1162984. ISSN 0096-3518 – via IEEE Xplore.
- ^ Gutierrez-Osuna, Ricardo. "L7: Linear prediction of speech" (PDF). Introduction to Speech Processing | Ricardo Gutierrez-Osuna | CSE@TAMU. p. 24.
 | This computing article is a stub. You can help Wikipedia by expanding it. |