T1.EMB single encoding distortion improvements using synchronous code correction

The authors report the results of an investigation into the single transcoding performance effects of synchronous code correction (SCC) on the draft American National Standard embedded ADPCM (adaptive differential pulse code modulation) algorithm (T1.EMB). It is established through analysis and simulations that the inclusion of the SCC property in T1.EMB will guarantee no loss in PCM-to-PCM signal-to-noise ratio (SNR) measurements and for many input signals will improve the PCM-to-PCM SNR. The SNR improvements are shown to be modest, which leaves as an open issue the question of whether the SCC complexity is justified