The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Um sinal quase periódico é um sinal periódico com variações de período e amplitude. Vários sinais fisiológicos, incluindo o eletrocardiograma (ECG), podem ser tratados como quase periódicos. A quantização vetorial (VQ) é uma ferramenta valiosa e universal para compressão de sinal. No entanto, a compressão de sinais quase periódicos usando VQ apresenta vários problemas. Primeiro, um livro de códigos pré-treinado tem pouca adaptação às variações do sinal, resultando em nenhum controle de qualidade dos sinais reconstruídos. Em segundo lugar, a periodicidade do sinal provoca redundância de dados no livro de código, onde muitos vectores de código estão altamente correlacionados. Esses dois problemas são resolvidos pelo esquema proposto de reabastecimento de livro de código VQ (CRVQ) baseado em uma estrutura de livro de código em forma de barra (BS). No CRVQ, os vetores de código podem ser atualizados online de acordo com as variações do sinal, e a qualidade dos sinais reconstruídos pode ser especificada. Com a estrutura do livro de códigos BS, a redundância do livro de códigos é reduzida significativamente e é economizado um grande espaço de armazenamento do livro de códigos; além disso, vetores de código de dimensão variável (VD) podem ser usados para minimizar a taxa de bits de codificação sujeita a uma restrição de distorção. A fundamentação teórica e o esquema de implementação do VD-CRVQ são apresentados. Os dados de ECG do banco de dados arrítmico do MIT/BIH são testados e o resultado é substancialmente melhor do que o uso de outros métodos de compressão VQ.
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Shaou-Gang MIAOU, "Compression of Physiological Quasi-Periodic Signals Using Optimal Codebook Replenishment Vector Quantization with Distortion Constraint" in IEICE TRANSACTIONS on Information,
vol. E85-D, no. 8, pp. 1325-1333, August 2002, doi: .
Abstract: A quasi-periodic signal is a periodic signal with period and amplitude variations. Several physiological signals, including the electrocardiogram (ECG), can be treated as quasi-periodic. Vector quantization (VQ) is a valuable and universal tool for signal compression. However, compressing quasi-periodic signals using VQ presents several problems. First, a pre-trained codebook has little adaptation to signal variations, resulting in no quality control of reconstructed signals. Secondly, the periodicity of the signal causes data redundancy in the codebook, where many codevectors are highly correlated. These two problems are solved by the proposed codebook replenishment VQ (CRVQ) scheme based on a bar-shaped (BS) codebook structure. In the CRVQ, codevectors can be updated online according to signal variations, and the quality of reconstructed signals can be specified. With the BS codebook structure, the codebook redundancy is reduced significantly and great codebook storage space is saved; moreover variable-dimension (VD) codevectors can be used to minimize the coding bit rate subject to a distortion constraint. The theoretic rationale and implementation scheme of the VD-CRVQ is given. The ECG data from the MIT/BIH arrhythmic database are tested, and the result is substantially better than that of using other VQ compression methods.
URL: https://global.ieice.org/en_transactions/information/10.1587/e85-d_8_1325/_p
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@ARTICLE{e85-d_8_1325,
author={Shaou-Gang MIAOU, },
journal={IEICE TRANSACTIONS on Information},
title={Compression of Physiological Quasi-Periodic Signals Using Optimal Codebook Replenishment Vector Quantization with Distortion Constraint},
year={2002},
volume={E85-D},
number={8},
pages={1325-1333},
abstract={A quasi-periodic signal is a periodic signal with period and amplitude variations. Several physiological signals, including the electrocardiogram (ECG), can be treated as quasi-periodic. Vector quantization (VQ) is a valuable and universal tool for signal compression. However, compressing quasi-periodic signals using VQ presents several problems. First, a pre-trained codebook has little adaptation to signal variations, resulting in no quality control of reconstructed signals. Secondly, the periodicity of the signal causes data redundancy in the codebook, where many codevectors are highly correlated. These two problems are solved by the proposed codebook replenishment VQ (CRVQ) scheme based on a bar-shaped (BS) codebook structure. In the CRVQ, codevectors can be updated online according to signal variations, and the quality of reconstructed signals can be specified. With the BS codebook structure, the codebook redundancy is reduced significantly and great codebook storage space is saved; moreover variable-dimension (VD) codevectors can be used to minimize the coding bit rate subject to a distortion constraint. The theoretic rationale and implementation scheme of the VD-CRVQ is given. The ECG data from the MIT/BIH arrhythmic database are tested, and the result is substantially better than that of using other VQ compression methods.},
keywords={},
doi={},
ISSN={},
month={August},}
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TY - JOUR
TI - Compression of Physiological Quasi-Periodic Signals Using Optimal Codebook Replenishment Vector Quantization with Distortion Constraint
T2 - IEICE TRANSACTIONS on Information
SP - 1325
EP - 1333
AU - Shaou-Gang MIAOU
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Information
SN -
VL - E85-D
IS - 8
JA - IEICE TRANSACTIONS on Information
Y1 - August 2002
AB - A quasi-periodic signal is a periodic signal with period and amplitude variations. Several physiological signals, including the electrocardiogram (ECG), can be treated as quasi-periodic. Vector quantization (VQ) is a valuable and universal tool for signal compression. However, compressing quasi-periodic signals using VQ presents several problems. First, a pre-trained codebook has little adaptation to signal variations, resulting in no quality control of reconstructed signals. Secondly, the periodicity of the signal causes data redundancy in the codebook, where many codevectors are highly correlated. These two problems are solved by the proposed codebook replenishment VQ (CRVQ) scheme based on a bar-shaped (BS) codebook structure. In the CRVQ, codevectors can be updated online according to signal variations, and the quality of reconstructed signals can be specified. With the BS codebook structure, the codebook redundancy is reduced significantly and great codebook storage space is saved; moreover variable-dimension (VD) codevectors can be used to minimize the coding bit rate subject to a distortion constraint. The theoretic rationale and implementation scheme of the VD-CRVQ is given. The ECG data from the MIT/BIH arrhythmic database are tested, and the result is substantially better than that of using other VQ compression methods.
ER -