Grounded theory is a systematic methodology in the social sciences involving the construction of theory through methodic gathering and analysis of data. Grounded theory is a research methodology which operates inductively, in contrast to the hypothetico-deductive approach. A study using grounded theory is likely to begin with a question, or even just with the collection of qualitative data. As researchers review the data collected, repeated ideas, concepts or elements become apparent, and are ta
Definition - What does Pulse Code Modulation (PCM) mean? Pulse code modulation (PCM) is a digital representation of an analog signal that takes samples of the amplitude of the analog signal at regular intervals. The sampled analog data is changed to, and then represented by, binary data. PCM requires a very accurate clock.
PDM stands for pulse density modulation. However, it is really better summarized as âoversampled 1-bit. audioâ, as it is nothing more than a high sampling rate, single-bit digital system. If one increased the. sample rate of audio CDs by a large factor, and reduced the wordlength from 16 bits to 1 in a reasonable. way, that would serve as the basis of a PDM system. Most current digital audio systems use multi-bit PCM (pulse code modulation) to represent the signal.