NEC 128 manual Desktop PC Components, Video Capture Board, CCD Desktop Camera

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2-6 Application Configurations

Desktop PC Components

The Desktop PC incorporates the following components:

VisuaLink 128 or VisuaLink 384

Video Capture Board

CCD Desktop Camera

Microphone

Cable Kit

VisuaLink Director software

VisuaLink 128/384

Depending on the requirements, either a VisuaLink 128 or VisuaLink 384 (both include infrared remote control) would be supplied as the heart of a videoconferencing system.

Video Capture Board

The Video Capture board installs in the user’s Pentium (100 Mhz or faster) PC. This PCI bus board provides the video interface between the VisuaLink unit and the desktop PC.

CCD Desktop Camera

CCD Desktop Camera

 

The CCD Desktop Camera is a full color camera with the following

 

features:

• Fixed camera for one or two person shot

• Manual pan/tilt for quick shot framing

• Manual focus for easy image adjustment

• Simple set-up

Desktop Microphone

Microphone

 

 

 

 

 

A conference type omni-directional desktop microphone (AT841/INT)

 

 

 

 

 

is supplied with VisuaLink Desktop PC. This sensitive microphone is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

specifically designed for conference applications and can pick-up most

 

 

 

 

 

anyone speaking in the nearby area.

Cable Kit

The Cable Kit includes all necessary cables (except cables for connection to an BRI NT1 interface unit). The cables for the NT1 are supplied with that unit option.

VisuaLink 128/384 General Description

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Contents NDA-24229, Issue VisuaLink 128/384Liability Disclaimer Contents Specifications Introduction OverviewFeatures Camera Control Echo CancellerPhone-Like Dialing Videoconferencing ComplianceField Upgradable PBX ConnectivityApplications Isdn BRI VisuaLink Documentation Introduction VisuaLink 128/384 General Description Application Configurations Roll-About Desktop PC GatewayRoll-About Easily moved, use in active locationsVisuaLink 128/384 Roll-About ComponentsVideo Cabinet Video MonitorCable Kit Motion Video CameraMicrophone OptionsDesktop PC Also available with control softwareDesktop PC Components Video Capture BoardCCD Desktop Camera VisuaLink Director Software NT1 Graphics Camera D30 Camera AT841/INT MicrophonePersonal Computer Requirements Laptop PC optionGateway VisuaLink & ViewPoint VBX GatewayVisuaLink Direct Connect Gateway Technical Description System ControlCodec Echo CancellerVideo & Audio Interfaces VideoSystem Control Line InterfacePicture Resolution More on H.320 VideoconferencingVideo Frame Rate Data Transmission Rate Video ProcessingAudio For ExampleTechnical Description VisuaLink 128/384 General Description Installation & Maintenance Installation RequirementsMaintenance Requirements Specifications General SpecificationsPage Parameter VisuaLink General ParametersUnit Size External Interface Parameters Line InterfaceSerial Call Dialing Originating Modes Operating Modes & FeaturesVisuaLink Unit Control Incoming Call Answer ModesVideo Display/Output Modes Line Interface ControlLine Connect Modes Audio Control ModesMaintenance Multi-Point Conference ControlSerial Port Modes VisuaLink 128/384 General Description

128 specifications

The NEC 128 is a remarkable microprocessor that represents a significant leap in technological innovation during its time. Introduced in the early 1980s, this processor was designed to meet the demands of increasingly sophisticated computing tasks, primarily aimed at the burgeoning field of personal computing and embedded systems.

One of the standout features of the NEC 128 is its 16-bit architecture, which was quite advanced for its era. This architecture allows for a greater data throughput, enabling the handling of larger data sets and providing improved performance over its predecessors. The NEC 128 operates on a clock speed that typically ranges from 4 to 8 MHz, making it capable of executing instructions efficiently and swiftly, which was crucial for running more complex applications.

The processor is built using CMOS technology, which offers significant advantages in terms of power consumption compared to earlier bipolar technology. This characteristic made the NEC 128 not only suitable for desktop computing but also an appealing choice for battery-operated devices, enhancing its versatility. The use of CMOS allowed for a reduced heat output, contributing to the reliability and longevity of devices powered by this microprocessor.

Another noteworthy aspect of the NEC 128 is its support for a variety of addressing modes. This flexibility enables programmers to write more efficient and compact code, optimizing the use of memory resources. By supporting both immediate and indirect addressing, the NEC 128 allows for more dynamic programming, which is essential for developing applications that require real-time processing.

The processor's architecture also includes a robust instruction set that facilitates arithmetic operations, logical operations, and control flow management. This comprehensive instruction set is instrumental for developers, as it provides the necessary tools for creating a wide range of applications, from simple utilities to more complex software systems.

In summary, the NEC 128 microprocessor is characterized by its 16-bit architecture, efficient CMOS technology, and a versatile instruction set, making it a compelling choice for its era. Its combination of performance, power efficiency, and flexibility positioned it as a formidable player in the personal computing market and laid the groundwork for future advancements in microprocessor technology. With its various applications and features, the NEC 128 remains a noteworthy chapter in the history of computing.