What Is G729 Codec and What Are Its Advantages?
Today, you don’t have to be a technology buff to be familiar with Voice over Internet Protocol (VoIP). Getting involved in audio communications over the internet is no longer a thing of the future. It is almost a commonplace task. But, have you ever wondered how it is done? How your voice is transmitted with little or no delay over long distances through the miracle of the internet?
The answer to all the above questions is codecs. The G.729 is one such codec. These are computer programs or algorithms specifically crafted for this purpose. In the current scenario where audio signals are involved, they code or compress the analog signals into digital signals at the source and consequently decode or decompress the same once again into analog signals at the destination. The G.729 is a standard which is set and approved by the ITU-T (International Telecommunication Union). The algorithm they use is the Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP). This technological marvel which is no less than a boon for the telecommunications industry produces an output with an exceedingly low bitrate of 8 kb/s that deliver the digital audio signals in small packets of 10ms duration.
The major advantage with G.729 Codec is its extremely low bandwidth requirement. A large bandwidth connection and high power sources are not easily available in many undeveloped as well as developing parts of the world. The transfer of huge digital data over the internet will not only require a high bandwidth connection but will also consume more power as well as take more time. Not to mention the large costs that you are liable to incur from them. Contrary to this, the G.729 ensures quality and cost effectiveness at the same time with a toll-quality speech and the lowest bitrate in its category. They can be used even in places which doesn’t have a fast and stable internet connection.
Another benefit that the G.729 audio codec provides is it interoperability. The process of modification and up gradation of an existing network or devices is a costly proposition. These algorithms are standardized internationally and are supported by most of the existing carriers and service providers. Also, they can be easily operated on the VoIP equipment of a large number of manufacturers worldwide. As a result, they are cost effective and the customers acquire a sense of security while investing in the products utilizing this technology.
A number of extensions have also been developed for the G.729,thatoffer some additional features. Two of these are the Annex A (G.729A) and the Annex B (G.729. The G.729A is relatively simpler than he G.729 and has a slightly lower audio quality. Moreover, it is completely interoperable with the G.729. On the other hand, the G.729B variant, although incompatible with the preceding versions offers the discontinuous transmission (DTX) or the Voice Activity Detection (VAD), silence suppression, and Comfort Noise Generation (CNG) features. These attributes help the G.729B in using a lower bandwidth and providing faster and better speech quality.