1. Multi-rate signal processing sub-band coding for speech signal
Authors : Dr.i.kullayamma, M.venkatanaresh
Pages : 251-257
DOI : http://dx.doi.org/10.21172/1.93.42
Keywords : Multi-rate Digital signal processing, sub-band coding, FIR and IIR filters and Coding gain. Abstract :In many applications of digital signal processing such as Tele-communication systems, transmitting different types of signals with different rates of Band widths and retaining the quality of speech signal is an important criteria. An Effective utilization of the Band width and proper sampling rate conversion enables usage of channel capacity productively. In this paper we have studied several characteristics of multi-rate Digital signal processing systems using FIR,IIR filters and implemented a frequency domain Digital coding technique, sub-band coding on a sinusoidal, real time speech signal in an audible frequency spectrum of 20-20KHz and 22100 samples. The initial stage involves in sub-dividing the input signal into several frequency bands and each frequency band is digitally encoded separately with different no. of bits and at the receiver end the stream of bits are decoded and a small delay is observed in between input and reconstructed signal. several metrics like Variances ,Arithmetic, Geometric Mean, Coding gain are evaluated on the input signal.
Citing this Journal Article :Dr.i.kullayamma, M.venkatanaresh , "Multi-rate signal processing sub-band coding for speech signal ", Volume 9 Issue 3 - January 2018, 251-257
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