title: A high capacity data recording device based on a digital audio processor and a video cassette recorder.
abstract: A modified digital audio processor, a video cassette recorder, and some simple added circuitry are assembled into a recording device of high capacity. The unit converts two analog channels into digital form at 44-kHz sampling rate and stores the information in digital form in a common video cassette. Bandwidth of each channel is from direct current to approximately 20 kHz and the dynamic range is close to 90 dB. The total storage capacity in a 3-h video cassette is 2 Gbytes. The information can be retrieved in analog or digital form.
mesh_terms: D003201:Computers; D006801:Humans; D008991:Monitoring, Physiologic; D013016:Sound; D014743:Videotape Recording / Q000295:instrumentation* / Q000379:methods