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Term
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Description
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V Reference Point
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Proprietary interface within central office used to connect
the line cards to the ISDN switch.
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V.90 Modem - Analog Phoneline
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V.90 modem, 56K modem is designed to operate with dialup
telephone lines worldwide. It supports high-speed analog data,
high speed fax & audio/voice operation. This integrated
modem is host controlled and helps reduce chip count since
there is no separate microcontroller. Data speeds up to 56Kbps
from a digitally connected central site modem - V.90 enabled.
Data can be sent upstream at speeds up to 33.6Kbps.
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Variable-bit codec
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Variable-bit codec allows the user to determine the sampling
rate for encoded audio. Higher sampling rates means that the
audio maintains better fidelity to the original but results
in less compression. Better the quality, larger are the resulting
files & vice versa. For most consumers MP3 files encoded
at reasonable rates (96kbps or 120kbps) are distinguishable
from CDs.
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Variance
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In video and imaging applications, this refers to how much
a pixel changes.
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VDSL
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Very high data rate DSL - 12.9-52.8 Mbps at shorter distances.
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Vector Graphics
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A method of describing lines and curves as mathematical
equations or vectors.
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Vector-based routing
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Ability to maintain consistent performance for a block of
logic as it is moved to different locations within Xilinx
FPGA's.
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Verification
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Part of the design process that checks to make sure the design
operates as the designer intended. Simulation is a type of
verification.
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Verilog
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A design language that designers use when creating FPGA or
ASIC designs.
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VESA
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Video Experts Standards Association
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VESA
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VESA (Video Electronics Standards Association) Local Bus
(sometimes called the VESA VL bus) is a standard interface
between your computer and its expansion slots that provides
faster data flow between the devices controlled by the expansion
cards and your computer's microprocessor.
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VHDL
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Acronym for VHSIC Hardware Description Language (VHSIC is
an acronym for Very High-Speed Integrated Circuits). A design
language that designers use when creating FPGA or ASIC designs.
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VITAL
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Acronym for VHDL Initiative Toward ASIC Libraries. This VHDL
industry standard defines how simulation models should be
created to allow simulators to work consistently. Xilinx includes
VITAL libraries in the software tools.
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VM
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Virtual Machine
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VOD
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Video On Demand. Term properly describing movie service,
but now generally referring to all types of on-demand services
where viewers are able to order and see a given program of
an individual basis at the time specified.
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VoDSL
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Voice over Digital Subscriber Line
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VoIP
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Voice over Internet Protocol
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VPN
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Virtual Private Network. A network service offered by public
carriers in which the customer is provided a network that
in many ways appears as if it is a private network (customer-unique
addressing, network management capabilities, dynamic reconfiguration,
etc.) but which, in fact, is provided over the carrier's public
network facilities. It hence enables IP traffic to travel
securely over a public TCP/IP network by encrypting all traffic
from one network to another. A VPN uses "tunneling" to encrypt
all information at the IP level.
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VToA
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Voice Telephony over ATM. Specified by the ATM Forum.
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