40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) - Annex A: Extensions of Recommendation G.726 for Use with Uniform- Quantized Input and Output - General Aspects of Digital Transmission Systems (Study Group 15) 8 pp
This annex extends the Adaptive Differential Pulse Code Modulation (ADPCM) algorithm specified in Recommendation G.726 to allow use of a uniform PCM interface at input and output.