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A hard disk recorder (HDR) is a system that uses a high-capacity hard disk to record digital audio or digital video. Hard disk recording systems represent an alternative to reel-to-reel audio tape recording and video tape recorders , and provide non-linear editing capabilities unavailable using tape recorders.
Loop recording is the process of recording audio continuously to an endless tape (if magnetic tape is used) or to computer memory, or recording video feeds (such as from video surveillance or camera signals) on a video server. [1]
Many are designed to record audio as well. DVRs have evolved into devices that are feature rich and provide services that exceed the simple recording of video images that was previously done through VCRs. A DVR CCTV system provides a multitude of advanced functions over VCR technology including video searches by event, time, date and camera.
Law enforcement use of call recording hardware is concentrated in two areas: Security recording of intercepted domestic and international calls for the prevention and detection of crime. Several US government agencies record calls as legally permitted. Hardware used in this application generally consists of large banks of servers and disk arrays.
The Series1 was the original TiVo digital video recorder. Series1 TiVo systems are based on PowerPC processors connected to MPEG-2 encoder/decoder chips and IDE/ATA hard drives. Series1 TiVo units used one or two drives of 13–60 GB. Although not supported by TiVo or equipment manufacturers, larger drives can be added.
Arm Ltd. (sells designs only) Amazon (AWS Graviton is ARM-based); Apple Inc. (ARM-based CPUs) Broadcom Inc. (ARM-based, e.g. for Raspberry Pi) Fujitsu (its ARM-based CPU used in top supercomputer, still also sells its SPARC-based servers)
1993: Random Access Digital Audio Recorder is the first single box device used for simultaneously recording 24 tracks of digital audio at once, onto hard disk drives. The product, manufactured by Creation Technologies was announced in October 1993 at the AES convention in New York. The first RADAR recorders shipped in August 1994.
Scully 280 eight-track recorder at the Stax Museum of American Soul Music Digital audio interface for the Pro Tools computer-based hard disk multitrack recording system. Digital audio quality is measured in data resolution per channel. Multitrack recording (MTR), also known as multitracking, is a method of sound recording developed in 1955 that ...