The characteristics given below are recommended for encoding voice-frequency signals
ITU-T G.711-1988 Referenced Document
ITU-T G.113 Transmission impairments due to speech processing Study Group 12*, 2024-04-19 Update
ITU-T G.701 Vocabulary of Digital Transmission and Multiplexing and Pulse Code Modulation (PCM) Terms - General Aspects of Digital Transmissions Systems (Study Group XV) 40 pp*, 1993-01-01 Update
ITU-T G.721 32 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) - General Aspects of Digital Transmission Systems; Terminal Equipments (Study Groups XV and XVIII) 38 pp*, 1989-01-01 Update