Abstract
Digital cellular telephone systems require efficient encoding of speech to achieve capacity improvements required of the next generation of cellular systems. The use of a variable rate speech coder can reduce the average data rate required to transmit conversational speech by a factor of two or more, while providing many other advantages. This reduction in average data rate leads to a factor of two increase in the capacity of a Code Division Multiple Access, or CDMA, based digital cellular telephone system by decreasing the mutual interference among users. This chapter describes “QCELP,” a variable rate speech coder which has been selected as the speech coding algorithm for the TIA North American digital cellular standard based on CDMA technology.
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References
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© 1993 Springer Science+Business Media New York
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Gardner, W., Jacobs, P., Lee, C. (1993). QCELP: A Variable Rate Speech Coder for CDMA Digital Cellular. In: Atal, B.S., Cuperman, V., Gersho, A. (eds) Speech and Audio Coding for Wireless and Network Applications. The Springer International Series in Engineering and Computer Science, vol 224. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3232-3_12
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DOI: https://doi.org/10.1007/978-1-4615-3232-3_12
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-6420-7
Online ISBN: 978-1-4615-3232-3
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