首页>
外国专利>
Constant rate transmission digital word image compression, for transmission from satellite, using transform coding and controlling quantization steps according to data rate of previous block
Constant rate transmission digital word image compression, for transmission from satellite, using transform coding and controlling quantization steps according to data rate of previous block
展开▼
机译:恒速传输数字字图像压缩,用于从卫星传输,使用变换编码并根据前一数据块的数据速率控制量化步骤
展开▼
页面导航
摘要
著录项
相似文献
摘要
The compression method produces digital word blocks transformed by an orthogonal transformer (12) and quantizes (14) the coefficients. An entropy code (20) of the coefficients is produced, and the coded words are temporarily held in a memory (18). The quantization steps are controlled so that the number of bits in the coded blocks is approximately equal to the number of bits removed from the memory, taking account (54) of the measured data rate of the previous block. An Independent claim is included for the application of the method of the invention to the transmission of images of the earth's surface from a satellite.
展开▼