ADPCM for advanced LANDSAT downlink applications

Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI:10.1109/ACSSC.1993.342323

B. Brower, D. Couwenhoven, B. Gandhi, C. Smith

引用次数: 28

Abstract

Under funding from the Defense LANDSAT Program Office, a method was developed for compressing multispectral data. A rate-controlled adaptive differential pulse code modulation technique was developed with minimal complexity for downlink applications. This algorithm uses an adaptive 2-D and 3-D prediction of pixels. The difference between the predicted and original pixel is quantized with a locally adaptive quantizer. This technique has produced compression ratios of up to 2.5:1 losslessly and up to 5:1 with minimal visual image quality loss on LANDSAT and M-7 high resolution multispectral data. This paper describes the ADPCM algorithm and its impact on numerical, visual and machine exploitation performance.<>

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ADPCM用于先进的陆地卫星下行应用

在国防陆地卫星项目办公室的资助下，开发了一种压缩多光谱数据的方法。提出了一种速率控制的自适应差分脉冲编码调制技术。该算法使用自适应二维和三维像素预测。使用局部自适应量化器对预测像素与原始像素之间的差异进行量化。在LANDSAT和M-7高分辨率多光谱数据上，该技术产生了高达2.5:1的无损压缩比和高达5:1的无损压缩比，视觉图像质量损失最小。本文介绍了ADPCM算法及其对数值、视觉和机器开发性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of 27th Asilomar Conference on Signals, Systems and Computers

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