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Bibliografía [1] ITU-T Recommendation G.729, .Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear-prediction. Annex B: A silence compression scheme for g.720 optimized for terminals conforming to recommendation v. A multiplexing scheme for H.323 voice-over-IP applications " ;
The system is environment monitoring service based on Wireless Sensor Networks (WSN). Users can know temperature, humidity, light, and CO<sub>2</sub> level in real time. Excessive electricity consumption by lighting in the office can be saved and the quality of the office environment can become better by controlling lighting and CO<sub>2</sub> level.
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