基于微扰的celp编码器预处理算法

1999 IEEE Workshop on Speech Coding Proceedings. Model, Coders, and Error Criteria (Cat. No.99EX351) Pub Date : 1999-06-20 DOI:10.1109/SCFT.1999.781515

J. Jensen, S. H. Jensen, E. Hansen

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引用次数: 4

摘要

提出了一种新的celp编码器预处理算法。该算法旨在对原始信号进行轻微扰动，使扰动后的信号在主观上与原始信号无法区分，但可以更有效地进行编码。该算法的一个关键特点是可以控制扰动的频域特性。将该算法与类似celp的编码器结合进行的初步模拟表明，在分段信噪比和主观语音质量方面有所改善。

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A perturbation-based pre-processing algorithm for CELP-coders

A novel pre-processing algorithm for CELP-coders is proposed. The algorithm aims at perturbing the original signal slightly, such that the perturbed signal is subjectively indistinguishable from the original but can be coded more effectively. A key feature of the algorithm is the possibility of controlling the frequency domain properties of the perturbations. Preliminary simulations with the proposed algorithm in combination with a CELP-like coder indicate improvements in terms of segmental SNR and subjective speech quality.

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来源期刊

1999 IEEE Workshop on Speech Coding Proceedings. Model, Coders, and Error Criteria (Cat. No.99EX351)

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