Analog transmission is not particularly efficient. When the signal-to-noise ratio of an analog signal deteriorates due to attenuation, amplifying the signal also amplifies noise. Digital signals are ...

This paper presents the Adaptive Differential Pulse Code Modulation (ADPCM) method of digitally storing and reproducing speech or other waveforms. A detailed explanation of the encoding steps is given ...

Hi everybody,<BR><BR> Just for fun, I've decided to try writing my own lossless image compressor. Its nothing special, just differential pulse code modulation with rice coding and a huffman encoder ...

Fig 1. A DSM and its corresponding filter look remarkably similar. The primary difference is the signal being fed back. Fig 2. Compare the PWM, PRM, and DSM. Note that the difference between a PWM and ...

On many occasions, vendors have told me that their voice product for the WAN provides toll-quality voice. Every time I hear that phrase, I ask the same question: what does it mean? The term ...

1. Circuit Theory: Circuit components; network graphs; KCL, KVL; circuit analysis methods: nodal analysis, mesh analysis; basic network theorems and applications ...