利用基于感知-度量的码本搜索实现高效的复浸透谱频率

IF 3.2 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Signal Processing Letters Pub Date : 2024-09-20 DOI:10.1109/LSP.2024.3466012

Byeongho Jo;Seungkwon Beack

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引用次数: 0

摘要

为音频编码开发了复值频域线性预测编码（CLPC）。最近，有人提出了对 CLPC 系数进行有效量化的表示方法，其中包括复值频谱频率 (CISF)。CISF 有其局限性，因为它需要传递序列信息以消除歧义，并需要最高阶系数（HOC）来重构 CLPC 系数。本研究开发了一种基于 CISF 的改进方法，通过利用中间复多项式特性，消除了对额外信息的需求。此外，还提出了一种基于感知度量的编码本搜索方法，以提高量化效率。实验结果表明，该方法具有稳健的量化性能，而听力测试表明，与 12 kbps 的 MPEG-D USAC 长 TCX 相比，该方法的音频质量更胜一筹。

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Efficient Complex Immittance Spectral Frequency With the Perceptual-Metric-Based Codebook Search

Complex-valued frequency-domain linear predictive coding (CLPC) has been developed for audio coding. Recently, representations for efficiently quantizing CLPC coefficients have been proposed, including the complex immittance spectral frequency (CISF). The CISF has limitations in that it requires signalling the sequential information to eliminate ambiguity and the highest-order coefficient (HOC) for reconstructing the CLPC coefficients. This study developed a modified CISF-based method that eliminates the need for additional information by utilizing intermediate complex polynomial properties. Furthermore, a perceptual-metric-based codebook search was proposed to improve quantization efficiency. The experimental results show robust quantization performance, while listening tests demonstrate superior audio quality compared to MPEG-D USAC long TCX at 12 kbps.

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来源期刊

IEEE Signal Processing Letters 工程技术-工程：电子与电气

CiteScore

7.40

自引率

12.80%

发文量

339

审稿时长

2.8 months

期刊介绍： The IEEE Signal Processing Letters is a monthly, archival publication designed to provide rapid dissemination of original, cutting-edge ideas and timely, significant contributions in signal, image, speech, language and audio processing. Papers published in the Letters can be presented within one year of their appearance in signal processing conferences such as ICASSP, GlobalSIP and ICIP, and also in several workshop organized by the Signal Processing Society.