ADPCM编码的Verilog编码实现，代码有详细的注释，编译通过-ADPCM coding Verilog code, the code has detailed notes, compiled by

Project and source code for ADPCM

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).