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Safety-net pyramid VQ of LSF parameters for wideband speech codecs

Title
Safety-net pyramid VQ of LSF parameters for wideband speech codecs
Author
강상원
Issue Date
2001-05
Publisher
IEE-INST ELEC ENG
Citation
Electronics Letters, v. 37, issue. 11, page. 724-726
Abstract
In this paper, we propose the predictive pyramid VQ (PPVQ) with a safety-net concept, to quantize LSF parameters of the wideband speech. For prediction of the LSF parameters, the 1st order auto-regressive (AR) predictor is used. To quantize the prediction error signal having a Laplacian distribution effectively, we use a pyramid VQ (PVQ). For encoding low-correlation frames, a memoryless PVQ is used. By combining the PPVQ and the memoryless PVQ, hereby denoted "safety-net pyramid VQ", the advantages of both quantization methods can be utilized. The average SD value of a safety-net pyramid VQ is 0.35 dB less than that of a predictive split VQ (PSVQ). The safety-net pyramid VQ also requires low complexity and does not need any memory for the codebook storage.
URI
https://digital-library.theiet.org/content/journals/10.1049/el_20010492https://www.proquest.com/docview/1621271393/fulltextPDF/F43E65AFC3E845B3PQ/1?accountid=11283https://repository.hanyang.ac.kr/handle/20.500.11754/158395
ISSN
0013-5194; 1350-911X
DOI
10.1049/el:20010492
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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