Method and apparatus for signal compression and decompression

摘要

In one embodiment, the method of compressing a digital signal includes reducing redundancies in the digital signal, scaling a block of samples output from the reducing step by a scaling factor, and quantizing the scaled samples to produce compressed samples. The digital signal being compressed may be a digital radio frequency signal.

主权项

1. A method of compressing a digital signal, comprising:
reducing redundancies in the digital signal; scaling a block of samples output from the reducing step by a scaling factor, the scaling including collecting a number of samples to form the block of samples and adaptively determining the number of samples to form the block; quantizing the scaled samples to produce quantized samples, the quantized samples having a resolution of a first number of bits; and adaptively determining the resolution used to quantize the scaled samples by,
dequantizing the quantized samples to form dequantized samples,descaling the dequantized samples to form a reconstructed block of samples,storing the reconstructed block of samples in a memory,determining a variation between the reconstructed block of samples and the block of samples, andadjusting one or more of the resolution and the number of samples that form the block based on the variation.