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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
A digital tape format that uses 1.25" high-density metal particle tape, running at 57.8 mm/s, to record a video data rate of 50 Mb/s.
Video sampled at 4:2:2 is compressed at 3:3:1 using DCT-based intraframe compression. Two individually editable audio channels are recorded using 16-bit, 48 kHz sampling. The tape can be shuttled and searched up to x32 speed. Digital S includes two cue tracks and four further audio channels in a cassette housing with the same dimensions as VHS.
Industry:Entertainment
A UK forum of technology and service providers created in August 1995 with the objective to speed up the introduction of digital terrestrial TV in the UK. With its focus on implementation aspects, the efforts of the group are seen as an extension of the work done in DVB.
Membership is open to those DVB members who wish to participate actively in the introduction of digital terrestrial TV in the UK.
Industry:Entertainment
A German association that sets standards for the manufacture and performance of electrical and electronic equipment, as well as other devices. DIN connectors carry both audio and video signals and are common on equipment in Europe. (Also referred to as Deutsche Industrie Normenausschuss.)
Industry:Entertainment
These are compression algorithms from the Dolby Laboratories. The AC-2 coding is an adaptive transform coding that includes a filterbank based on time-domain alias cancellation (TDAS). The AC-3 is a dedicated multichannel coding, which like AC-2 uses adaptive transform coding with a TDAS filterbank. In addition, AC-3 employs a bitallocation routine that distributes bits to channels and frequencies depending on the signals, and this improves the coding efficiency compared to AC-2. The AC-3 algorithm is adopted for the 5.1-channel audio surround system in the American HDTV system.
Industry:Entertainment
A compression/expansion (companding) noise reduction system developed by Ray Dolby, widely used in consumer, professional and broadcast audio applications. Signal-to-noise ratio improvement is accomplished by processing a signal before recording and reverse-processing the signal upon playback.
Industry:Entertainment
Formerly AC-3, a perceptual audio coding system based upon transform coding techniques and psycho-acoustic principles.
Frequency-domain processing takes full advantage of noise masking by confining quantization noise to narrow spectral regions where it will be masked by the audio signal. Designed as an emissions (delivery) system, Dolby Digital provides flexible coding of up to 5.1 audio channels at a variety of data rates. In addition, Dolby Digital bit streams carry informational data about the associated audio.
Industry:Entertainment
A passive system that matrix encodes four channels of audio into a standard two-channel format (Lt/Rt). When the signal is decoded using a Dolby Surround Pro Logic decoder, the left, center, and right signals are recovered for playback over three front speakers and the surround signal is distributed over the rear speakers.
Industry:Entertainment
An active decoding process designed to enhance the sound localization of Dolby Surround encoded programs through the use of high-separation techniques. Dolby Surround Pro Logic decoders continuously monitor the encoded audio program and evaluate the inherent sound field dominance, applying enhancement in the same direction and in proportion to that dominance.
Industry:Entertainment
Pictures for which only DC coefficients are transmitted.
D-pictures are not part of MPEG-2 but only of MPEG-1. MPEG-2 decoders must be able to decode D-pictures.
Industry:Entertainment
