G.729An International Telecommunications Union (ITU) standard for for audio (speech) compression and decompression that is used in digital transmission systems, and in particular, used for the coding of analog signals into digital signals.
G.729 is an ITU-T audio data compression standard that operates at 8 kbit/s using a conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP). This algorithm for voice compresses voice audio in 10 millisecond frames. G.729 is commonly used in in Voice over IP (VoIP) applications because of its inherently low bandwidth requirement. Extensions to the G.729 standard include the following;
- G.729a (G.729 Annex A) - Compatible with G.729 Annex A specifies a coder with several simplifications, including code book search routines. These modifications are known to often result in a slightly lower voice quality.
- G.729b (G.729 Annex B) - Compatible with G.729, Annex B specifies a coder that uses Discontinuous Transmission (DTX), Voice Activity Detection (VAD), and Comfort Noise Generation (CNG) to reduce bandwidth usage. Bandwidth is reduced by preventing the transmission of non-voice during periods of silence.
See G.7xx for more information on how these standards are used in telephony networks.
From the widest view, everything that we include under the heading of mobile has irrevocably changed IT's relationship with the rest of the... Read More »Choosing an Enterprise Storage Implementation
When you deploy a new enterprise storage system, you must decide whether to design and build your own storage system or to utilize a cloud-based... Read More »Big Data Analytics Expert Predictions
In this Webopedia Did You Know...? article we look at three big data expert predictions for 2014. Read More »
Keeping track of big data trends, research and statistics gives IT professionals a solid foundation to plan big data projects. Here are 15... Read More »Enterprise Storage Vendors
There's a number of vendors that sell enterprise storage hardware or offer cloud-based enterprise storage. View Webopedia's Enterprise storage... Read More »50 Cloud Computing Terms Defined
From planning a private cloud project to finding an online cloud storage provider, Webopedia's A-Z Cloud Computing Glossary will help you... Read More »
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
- Enterprise Mobility Exchange results show continued growth and emphasis on mobility. CIOInsight breaks down the numbers here. »
- Watch Datamation's editor James Maguire moderate roundtable discussions with tech experts from companies such as Accenture, Dell, Blue Jeans Network, Microsoft and more »