MPEG to SPH Converter

MPEG was developed in 1993 as MPEG-1 and it was a very popular format for audio and video storage. Today it is the most compatible media format in the world. When the format first appeared, it was innovate and ahead of its time, provided relatively high quality files while reducing their size and made it easy to upload and download files by compressing them. These features allowed creating video CDs, digital TV and digital audio broadcasting. Due to its age, MPG is no longer covered by any patents, that is why both Mac and Windows applications along with many hardware support MPEG video and audio natively.

SPHERE (SPeech HEader Resources) is a file format defined by NIST (National Institute of Standards and Technology) and is used with speech audio. SoX can read these files when they contain μ-law and PCM data. It will ignore any header information that says the data is compressed using shorten compression and will treat the data as either μ-law or PCM. This will allow SoX and the command line shorten program to be run together using pipes to encompasses the data and then pass the result to SoX for processing.