A recording process that converts analog audio signals into binary data that represent the original audio waveform.
Technology that enables video images to be stored on a hard drive or other digital storage medium rather than on an analog medium such as a videotape.
Sound-recording process in which sound waves are recorded as digital bits. During playback, a digital-to-analog conversion occurs that changes the digital bits back into sound waves. Digital recording produces high-quality true sound that does not contain any system noise.
Conversion of the audio signal to a code of digital ones and zeros and recording the code. By playing back to code and converting the digital signal back to analog audio, the equipment is able to reproduce higher-fidelity sound.
A method of recording in which the recorded signal is encoded on the tape in pulses and then decoded during playback.
Advanced method of recording which involves a sequence of pulses or on/off signals rather than a continuously variable or analog signal; advantages are increased frequency range and lower tape noise. May be used for control, audio and video purposes
recording which converts analog signals to numbers for storage purposes
Technology that enables images from a camera to be stored on a hard drive. A digital recorder provides clearer images than videotape and faster access to them.
Advanced digital recording technology removed the need for tapes
1) ADAM : (Akai Digital Audio Multitrack). 12 track recording onto Video 8 tape. 16 bit, 44.1 or 48 kHz sampling rate. 2) DAT (Digital Audio Tape) Cassette-like system which has much higher quality than standard audio cassettes. Widely used in gathering sound effects, for news gathering, and for playback of music. 3) DCC (Digital Compact Cassette) Rival to DAT which also plays standard audio cassettes. 4) MiniDisc : Uses computer disk technology, rather than tape. A laser heats an area of magnetic disk which is then written to by a magnetic head. When cooled, the magnetic information is read from the disk by laser. Tracks can be named, and are instant start. Very theatre-friendly system. 5) Direct to Disk : Uses the hard disk present in most PCs as the recording medium.
A system of sound recording in which sound is represented as a series of discrete electrical measurements, expressed in binary numbers. The sound wave, converted into an electrical analogue by a microphone, is sampled and measured over time (for a musical CD, 44 100 samples per second). Each voltage measurement is then assigned a binary number. During playback, the binary data are converted to an electrical representation of the sound wave, which is converted in turn to acoustical energy by a speaker. See also analogue recording.
A recording in which binary numbers are written to the tape that represent quantized versions of the voltage signals from the recording microphone or the video camera. On playback, the numbers are read and processed by a digital-to-analog converter to produce an analog output signal.
This is the latest form of recording and is relatively new to the CCTV industry as a result is not the most economical method however it does have several advantages over the VCR analogue tape recorders. First of all it enables quick access to the desired image or picture. Digital images can also be enhanced or processed further which can help detect images that may normally go unnoticed. One of the better properties of Digital Recording is that there is no replay degradation due to poor tape quality and unlike conventional video recording methods Digital Recording provides a clear image when paused.
A recording that is done by the sampling of an analog signal into a series of 1's and 0's (or some similar 2 state representation).
An advanced form of video and/or audio electromagnetic recording wherein picture and/or sound information is converted into computer-like off-and-on bits of data.
Technique whereby the pressure of sound waves is sampled more than 30,000 times a second and the values are converted by computer into precise numerical values. These are recorded and, during playback, are reconverted to sound waves. The numerical values converted by the computer represent the original sound-wave form exactly and are recorded on compact disc. When this is played back by laser on a CD player, the exact values are retrieved. Then, when the signal is fed via an amplifier to a loudspeaker, sound waves exactly like the original ones are reproduced.
In digital recording, the analog signal of a motion-picture/sound is converted into a stream of discrete numbers, representing the changes in air pressure (chroma and luminance values in case of video) through time; thus making an abstract template for the original sound or moving image.