H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 1/66 (2006.01) G11B 20/10 (2006.01) H03M 1/34 (2006.01) H03C 3/00 (2006.01)
Patent
CA 2629508
An embodiment of an audio-signal digitizer includes a modulator and a converter. The modulator is operable to receive an analog audio signal, and is operable to angle modulate a carrier signal with the analog audio signal to generate a modulated analog signal having an average amplitude. The converter is operable to convert the modulated analog signal into a digital signal having a first level in response to the modulated signal having an amplitude larger than approximately the average amplitude and having a second level in response to the modulated signal having an amplitude smaller than approximately the average amplitude. Because such a digitizer uses angle modulation to digitize an analog audio signal, the resulting digital audio signal may retain higher frequencies of the analog audio signal than a digital audio signal obtained by amplitude sampling would retain. And the retaining of higher frequencies may introduce less distortion into the reconstituted audio and acoustic signals.
Farley Richard A.
Gowling Lafleur Henderson Llp
LandOfFree
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