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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.
Bellcore’s term for one-way T-1 to the home over the plain old, single twisted pair wiring already going to homes. ADSL is designed to carry video to the home. ADSL, like ISDN, uses adaptive digital filtering, which is a way of adjusting itself to overcome noise and other problems on the line. According to Northern Telecom, initial ADSL field trails and business cases have focused on ADSL’s potential for video-on-demand service, in competition with cable pay-per-view and neighbourhood video rental stores. But ADSL offers a wide range of other applications, including education and health care. Once telephone companies are able to deliver megabits to the home, Northern Telecom expects an explosion in potential applications including work-at-home access to corporate LANs, interactive services such as home shopping and home banking and even multi-party video gaming, interactive travelogues, and remote medical diagnosis. Multimedia retrieval will also become possible, enabling the home user to browse through libraries of text, audio, and image data – or simply subscribe to CD-quality music services. In the field of education, ADSL could make it possible to provide a low-cost “scholar’s workstation” – little more than a keyboard, mouse and screen – to every student, providing access to unlimited computer processing resources from their home. For a more modern version of ADSL, see DMT, which stands for Discrete Multi-Tone.
Industry:Entertainment
A) A transmission procedure that is not synchronised by a clock.
b) Any circuit or system that is not synchronised by a common clock signal.
Industry:Entertainment
Streaming of data only without any timing requirements. See Asynchronous Data Streaming, Synchronous Data Streaming.
Industry:Entertainment
A) A digital transmission system using packets of 53 bytes for transmission. ATM may be used for LANs and WANs. ATM is a switching/transmission technique where data is transmitted in small, 53-byte fixed sized cells (5-byte header, 48-byte payload). The cells lend themselves both to the time-division-multiplexing characteristics of the transmission media, and the packet switching characteristics desired of data networks. At each switching node, the ATM header identifies a virtual path or virtual circuit that the cell contains data for, enabling the switch to forward the cell to the correct next-hop trunk. The virtual path is set up through the involved switches when two endpoints wish to communicate.
This type of switching can be implemented in hardware, almost essential when trunk speeds range from 45 Mb/s to 1 Gb/s. The ATM Forum, a worldwide organization, aimed at promoting ATM within the industry and the end-user community was formed in October 1991 and currently includes more than 500 companies representing all sectors of the communications and computer industries, as well as a number of government agencies, research organizations, and users.
b) A digital signal protocol for efficient transport of both constant-rate and bursty information in broadband digital networks.
Industry:Entertainment
In audio terms, the beginning of a sound. What type of attack a sound has is determined by how long it takes for the volume of the sound to go from silence to maximum level. It is critical to consider the attack time of sounds when applying processing Compression, gating, and other types of processors as they may destroy a sound’s attack, changing the character and quality of the audio. Reverbs can also be affected by attack time; careful use of a reverb’s predelay parameter will allow you to optimise the reverb for different types of attacks.
Industry:Entertainment
These are the four parameters found on a basic synthesiser envelope generator. An envelope generator is sometimes called a transient generator and is traditionally used to control the loudness envelope of sounds, though some modern designs allow for far greater flexibility. The Attack, Decay, and Release parameters are rate or time controls. Sustain is a level control. When a key is pressed, the envelope generator will begin to rise to its full level at the rate set by the attack parameter; upon reaching peak level it will begin to fall at the rate set by the decay parameters to the level set by the sustain control. The envelope will remain at the sustain level as long a the key is held down. Whenever a key is released, it will return to zero at the rate set by the release parameters.
Industry:Entertainment
A decrease in the level of a signal is referred to as attenuation.
In some cases, this is unintentional, as in the attenuation caused by using wire for signal transmission. Attenuators (circuits which attenuate a signal) may also be used to lower the level of a signal in an audio system to prevent overload and distortion.
Industry:Entertainment
A) Signals consisting of frequencies corresponding to a normally audible sound wave ranging between the frequencies of 20 Hz to 20 kHz.
b) A DC signal with varying amounts of ripple. It is sometimes possible to see the ripple on the DC signal to convey information of widely variable degrees of usefulness. c) The sound portion of a program.
Industry:Entertainment
The range of audio frequencies which directly influence the fidelity of the audio. The higher the audio bandwidth, the better the audio fidelity. The highest practical frequency the human ear can normally hear is 20 kHz. An audio amplifier that processes all frequencies equally (flat response to 20 kHz) and a reasonably high signal-to-noise ratio, will accurately amplify the audio signal.
Industry:Entertainment
The ability to independently select audio sources regardless of which video source is selected, even though the audio is normally associated with a particular video (as opposed to follow).
Industry:Entertainment
