adpcm-xq | Xtreme Quality IMA-ADPCM Encoder / Decoder

adpcm-xq is a C library. adpcm-xq has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

//////////////////////////////////////////////////////////////////////////// // **** adpcm-xq **** // // xtreme quality adpcm encoder/decoder // // copyright (c) 2018 david bryant. // // all rights reserved. // // distributed under the bsd software license (see license.txt) // ////////////////////////////////////////////////////////////////////////////. while very popular at the end of the last century, adpcm is no longer a common audio encoding format, and is certainly not recommended as a general purpose encoder. however, it requires minimal cpu resources for decoding, and so still is ideally suited for certain embedded games and applications that contain canned audio samples. this encoder combines two different techniques to achieve higher quality than existing adpcm encoders while remaining fully compatible with standard decoders. the first is dynamic noise shaping, which shifts the quantization noise up or down in frequency based on the spectrum of the source signal. this technique is identical to the algorithm used in wavpack's lossy mode and can make any audible quantization noise