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This paper makes improvement in G.728 algorithm aiming at reducing coding rate and presents an 8 Kbit/s speech coding algorithm whose delay is 2.5 ms. The size of frame which is 5 samples in G.728 is extended to 20 samples. Adaptive codebook is introduced, which is composed of the recent excitation.20 dimensions normalized fixed codebook is adopted for the proposed algorithm. The exact gain of adaptive...
We consider the problem of distributed parameter estimation in wireless sensor networks (WSNs), where due to bandwidth/power constraints, each sensor quantizes its local observation into one bit of information that is sent to a fusion center (FC) to form a global estimate. Conventional fixed quantization (FQ) approaches, which utilize a fixed threshold for all sensors, incurs an estimation error growing...
We investigate the problem of distributed parameter estimation under the most stringent bandwidth constraint that each sensor quantizes its local observation into one bit of information. Conventional fixed quantization (FQ) approaches, which employ a fixed threshold for all sensors, incur an estimation error growing exponentially with the difference between the threshold and the unknown parameter...
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