NDLI: Overview of CCITT embedded ADPCM algorithms

Content Provider	IEEE Xplore Digital Library
Author	Sherif, M.H. Bowker, D.O. Bertocci, G. Orford, B.A. Mariano, G.A.
Copyright Year	1990
Description	Author affiliation: AT&T Bell Lab., Holmdel, NJ, USA (Sherif, M.H.; Bowker, D.O.; Bertocci, G.; Orford, B.A.; Mariano, G.A.)
Abstract	G.EMB is a draft CCITT recommendation for embedded ADPCM (adaptive differential pulse code modulation) encoding with five, four, three, and two core bits. The main properties of the algorithms of G.EMB are reviewed, and their performance for speech traffic is discussed. The embedded ADPCM algorithms allow the dropping of up to three least-significant bits to relieve congestion at any point between the transmitter and the receiver without the need to inform the receiving end. This bit dropping does not cause decoder divergence. Test results indicate that a mid-rise quantizer provides better voice transmission performance than its mid-tread counterpart when two bits are used in the feedback path. Subjective data show that the 40 kb/s mid-rise ADPCM algorithm with two feedback bits performs just as well as 64 kb/s PCM for up to four tandem encodings. G.EMB embedded algorithms are thus suitable for congestion control in multipoint and multinode network configurations.<>
Starting Page	1014
Ending Page	1018
File Size	321888
Page Count	5
File Format	PDF
DOI	10.1109/ICC.1990.117227
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-04-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decoding Phase change materials Transmitters Feedback Speech Feedforward systems Quantization Pulse modulation Sampling methods Bit rate
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in