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AVCHD (Advanced Video Coding High Definition) [1] is a file-based format for the digital recording and playback of high-definition video. It is H.264 and Dolby AC-3 packaged into the MPEG transport stream , with a set of constraints designed around camcorders.
[8] [9] [11] [10] This optimal setting improves linearity at mid-range frequencies but reduces dynamic range and causes a drop in high-frequency response, which is offset with pre-emphasis in the recording chain. [9] [11] Recording very low wavelengths at tape speeds of 4.76 cm/s (1.87 in/s) and 9.53 cm/s (3.75 in/s) presents another challenge.
DC bias is the addition of direct current to the audio signal that is being recorded. AC bias is the addition of an inaudible high-frequency signal (generally from 40 to 150 kHz) to the audio signal. Most contemporary tape recorders use AC bias. When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias ...
Prior to the introduction of 1/4-inch audio tape, recordings were made on 35mm optical cameras, and later on 16mm or 35mm magnetic stock. The first 1/4-inch recorder capable of recording a synch track to regulate the playback speed of the recording was made by Rangertone and was a variation on the soon-to-come Pilotone system.
A high-speed camera is a device capable of capturing moving images with exposures of less than 1 / 1 000 second or frame rates in excess of 250 frames per second. [1] It is used for recording fast-moving objects as photographic images onto a storage medium.
The frequency response for a conventional LP player might be 20 Hz to 20 kHz, ±3 dB. The low-frequency response of vinyl records is restricted by rumble noise (described above), as well as the physical and electrical characteristics of the entire pickup arm and transducer assembly. The high-frequency response of vinyl depends on the cartridge.
It is used to measure high data transfer speeds of connections such as Ethernet and cable modems. Megabyte A measure of computer memory or storage. It is one million bytes (in the context of computer memory, sometimes used to mean 1,048,576 (2 to the power 20) bytes). Megahertz A unit of frequency equal to one million hertz or cycles per second.
Muybridge's photographic sequence of a race horse galloping, first published in 1878. High-speed photography is the science of taking pictures of very fast phenomena. In 1948, the Society of Motion Picture and Television Engineers (SMPTE) defined high-speed photography as any set of photographs captured by a camera capable of 69 frames per second or greater, and of at least three consecutive ...