ADPCM: US Patents from 2010 to 2016

Muhanned AL-Rawi


Due to its importance and its wide applications in telecommunication networks, the Adaptive Differential Pulse Code Modulation(ADPCM) was standardized by International Telecommunication Union(ITU). This paper presents and describes briefly the recent US patents on ADPCM starting from 2010 to 2016. Also, the general structure of ADPCM is described. The work in this paper opens the minds of the researchers and encourages them to continue doing research on this field.

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40, 32,24,16 kb/s ADPCM, CCITT Recommendation G.726-1990.

J. Minami , et al," Communications processor", US Patent 7,646,790, January 12, 2010.

L. Cheng-Chieh, "Method and apparatus for diversity control in multiple description voice communication", US Patent 7,756,705, July 13, 2010.

S. Kumer, "Stabilization and glitch minimization for CCITT recommendation G.726 speech CODEC during packet loss scenarios by regressor control and internal state updates of the decoding process", Us Patent 8,204,753, June 19, 2012.

Y, Suwa, et al, "Wireless communication device and wireless communication system", US Patent 8,457,185, June 4, 2013.

Y. Sato, et al, "Adaptive differential pulse code modulation encoding apparatus and decoding apparatus", US Patent 8,482,439, July 9, 2013.

P. Craven, et al, " Lossy coding of signals", US Patent 8,533,571, September 10, 2013.

A. Chau, "Methods and systems using a compensation signal to reduce audio decoding errors at block boundaries", US Patent 8,649,523, February 11, 2014.

Y. Suwa, et al, "Voice processing apparatus and method for detecting and correcting errors in voice data", US Patent 9,021,318, April 28, 2015.

P. Craven, et al, "Prediction of signals", US Patent 9,106,241, August 11, 2015.

A. Shibuta, et al, "Wireless communication device and communication terminal", US Patent 9,270,419, February 23, 2016.

A. Gur, "Non-synchronized ADPCM with discontinuous transmission", US Patent 9,332,585, May 3, 2016.

S. Ragot, et al, "Controlling a noise-shaping feedback loop in a digital audio signal encoder avoiding instability risk of the feedback", US Patent 9,489,961, November 8, 2016.

Z. Markus, et al,"Method of packet loss concealment in ADPCM codec and ADPCM decoder with PLC circuit", US Patent 20160148619A1, May 26, 2016.


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