CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the digital visual interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used.
The Hum is a generic name for a common class of phenomena consisting of a persistent, invasive low-frequency sound from an unknown source. In addition, the phenomena is only audible to certain people, existing at the far low end of the audio spectrum, with a peak power spectral density between about 10 and 60 Hz.
Hummingbird Ltd. (previously NASDAQ: HUMC, TSX: HUM) is a subsidiary of OpenText and is a provider of enterprise software solutions including Exceed. Initially founded as a consulting business in 1984, Hummingbird moved into the connectivity market.