使用VHDL语言，实现通信脉冲编码调制（PCM）的u律压缩。,Using VHDL language, the realization of communication pulse code modulation (PCM) of u law compression.

The DVI Adaptive Differential Pulse Code Modulation (ADPCM) algorithm was first described in an IMA recommendation on audio formats and conversion practices [1]. ADPCM is a transformation that encodes 16-bit audio as 4 bits (a 4:1 compression ratio).

LFM pulse compression of the Matlab program, Including the final calculation of the compressed image peak signal to noise ratio and compression of the source, Achieve a grayscale image and further control for video surveillance.