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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.
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 programmes through the use of high-separation techniques. Dolby Surround Pro Logic decoders continuously monitor the encoded audio programme 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
A telephone company format for transmitting information digitally.
DS1 has a capacity of 24 voice circuits at a transmission speed of 1.544 megabits per second.
Industry:Entertainment
A video output showing programme video with the DSK key over full time.
Industry:Entertainment
Formerly RCA Laboratories (now part of SRI International), home of the ACTV research.
Industry:Entertainment
This digital VCR format is a cooperation between Hitachi, JVC, Sony, Matsushita, Mitsubishi, Philips, Sanyo, Sharp, Thomson, and Toshiba. It uses 6.35 mm (0.25-inch) wide tape in a range of products to record 525/60 or 625/50 video for the consumer (DV) and professional markets (Panasonic’s DVCPRO, Sony’s DVCAM and Digital-8). All models use digital intra-field DCT-based “DV” compression (about 5:1) to record 8-bit component digital video based on 13.5 MHz luminance sampling.
Industry:Entertainment
Support for use of scrambling and conditional access (CA) within digital broadcasting systems (ETR 289).
Industry:Entertainment
Common interface specification for conditional access and other digital video broadcasting decoder applications (EN 50221).
Industry:Entertainment
