Title: A Survey on Speech Coding Standards and Coding Techniques
Abstract: Speech Communication is at present the most dominant and common service in telecommunication networks. Most of the present day demand and development in the area of speech communication are going to be in the bandwidth starved wireless systems . To keep up with this demand, good quality digital speech coders are required which can operate at sufficiently low bit rates and hence use bandwidth efficiently. Speech, which was earlier PCM coded at 64 kbps (in telephone systems) is now being coded at 13 kbps in commercial systems like GSM with the same quality. Latest research in the field of speech coding aims to b1ing the coding rate down to 4 kbps (commonly referred to in research circles as Very low bit rate coding) without appreciable loss in perceptual quality. Therefore new voice coding techniques are constantly studied to reach higher compression rates with better quality in networks[4]. This paper presents a summary of speech coding standards for various applications. Several speech-coding standards are discussed and a special emphasis is given to the recent standards and technique used
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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