使用合成DPCM的数字滤波

ISPA 2005. Proceedings of the 4th International Symposium on Image and Signal Processing and Analysis, 2005. Pub Date : 2005-10-24 DOI:10.1109/ISPA.2005.195450

W. Pogribny, B. Marciniak, T. Marciniak

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引用次数: 4

摘要

在数字滤波器中使用混合格式可以获得高分辨率和高速度的滤波。在这些格式中，输入信号以增量调制(DM)格式表示，而脉冲响应的权重因子则以脉冲编码调制(PCM)格式表示。本文提出了将几种现代化DPCM (MDPCM)码合成差分PCM (DPCM)码的方法。MDPCM量化步骤(代码)与2的自然幂成正比。这种方法只允许将乘法替换为位的移位操作。本文旨在提高混合格式合成DPCM与PCM格式(SDPCM-PCM)的过滤分辨率，同时提高过滤的速效性，并提出合适的专用处理器结构。

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Digital filtration with use of synthetic DPCM

High resolution and speed of filtration can be obtained by the use of mixed formats in digital filters. In these formats the input signal is represented in delta modulation (DM) format whereas weight factors of pulse response are in the pulse code modulation (PCM) format. In this paper we suggest to synthesize codes of differential PCM (DPCM) from a few modernized DPCM (MDPCM) codes. The MDPCM quantization steps (codes) are proportional to natural powers of 2. Such approach allows to replace the multiplication with an operation of shift of bits only. Aim of this work is to increase the resolution and at the same time the fast-acting of filtration in mixed format synthesized DPCM along with PCM format (SDPCM-PCM) and suggest suitable structures of specialized processors.

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ISPA 2005. Proceedings of the 4th International Symposium on Image and Signal Processing and Analysis, 2005.

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