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This is a glossary of terms relating to computer hardware – physical computer hardware, architectural issues, and peripherals.
- a microprocessor, ASIC or expansion card designed to offload a specific task from the CPU, often containing fixed function hardware; a common example is a Graphics processing unit.
- a register in a CPU in which intermediate arithmetic and logic results are stored.
- the unique integer number that specifies a memory location in an address space
- a mapping of logical addresses into physical memory or other memory mapped devices.
- an accelerator aimed running artificial neural networks or other machine learning and machine vision algorithms (either training or deployment), e.g. Movidius Myriad 2, TrueNorth, Tensor processing unit etc.
- Advanced Technology extended - a motherboard form factor specification developed by Intel in 1995 to improve on previous DE factor standards like the AT form factor.
- The dimensions and layout (form factor) of the motherboard for the IBM AT.
- Accelerated Graphics Port - a high-speed point-to-point channel for attaching a video card to a computer's motherboard, primarily to assist in the acceleration of 3D computer graphics.
- a subsystem that transfers data between computer components inside a computer or between computers.
- an optical discstorage medium designed to supersede the DVD format.
- A small, fast local memory that transparently buffers access to a larger but slower or more distant/higher latency memory or storage device, organised into cache lines. Automatically translates accesses to the underlying resources address space to locations in the cache.
- A small block of memory within a cache; the granularity of allocation,refills,eviction; typically 32-128 bytes in size.
- The process of keeping data in multiple caches synchronised in a multi-processorshared memory system, also required when DMA modifies the underlying memory.
- freeing up data from within a cache to make room for new cache entries to be allocated; controlled by a cache replacement policy. Caused by a cache miss whilst a cache is already full.
- finding data in a local cache, preventing the need to search for that resource in a more distant location (or to repeat a calculation).
- Not finding data in a local cache, requiring use of the cache policy to allocate and fill this data, and possibly performing evicting other data to make room.
- A pathological situation where access in a cache cause cyclical cache misses by evicting data that is needed in the near future.
- The number of potential cache lines in an associative cache that a specific physical addresses can be mapped to; higher values reduce potential collisions in allocation.
- a data input device that reads data from a card-shaped storage medium.
- the enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse).
- Compact Disc-Recordable; a variation of the optical compact disc which may be written to once.
- (Compact Disc-ReWritable) a variation of the optical compact disc which may be written to many times.
- Cache-only memory architecture, a multiprocessormemory architecture where an address space is dynamically shifted between processor nodes based on demand.
- See CD-RW
- (Compact Disc Read-Only Memory) - a pre-pressed compact disc which contains data or music playback.
- (or integrated circuit) - a miniaturised electronic circuit that has been manufactured in the surface of a thin substrate of semiconductor material.
- the memory that stores the microcode of a CPU.
- the portion of a CPU which actually performs arithmetic and logical operations. A CPU may have multiple cores (e.g. "a quad-core processor").
- in modern usage, a synonym for main memory, dating back from the pre-semiconductor-chip times when the dominant main memory technology was magnetic core memory.
- Central processing unit - the portion of a computer system that executes the instructions of a computer program.
- Conventional Peripheral Component Interconnect - a computer bus for attaching hardware devices in a computer.
- Computer chassis, cabinet, box, tower, enclosure, housing, system unit or simply case - the enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse).
- The name used to denote the dimensions, power supply type, location of mounting holes, number of ports on the back panel, etc.
- An electronicvisual display for computers. A monitor usually comprises the display device, circuitry, casing, and power supply. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) or a flat panel LED display, while older monitors used a cathode ray tubes (CRT).
- (or chip set) - a group of integrated circuits, or chips, that are designed to work together. They are usually marketed as a single product.
- a generic term that refers to a high-performance input/output (I/O) architecture that is implemented in various forms on a number of computer architectures, especially on mainframe computers.
- a cache in a CPU or GPU servicing data load and store requests, mirroring main memory (or VRAM for a GPU).
- a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers.
- local memory associated with a hardware device such as a graphics processing unit or OpenCLcompute device, distinct from main memory.
- (Direct Access Storage Device) A mainframe terminology introduced by IBM denoting secondary storage with random access, typically (arrays of) hard disk drives.
- (dual in-line memory module);A series of dynamic random-access memory integrated circuits. These modules are mounted on a printed circuit board and designed for use in personal computers, workstations and servers.
- DisplayPort is a digital display interface developed by the Video Electronics Standards Association (VESA). The interface is primarily used to connect a video source to a display device such as a computer monitor, though it can also be used to transmit audio, USB, and other forms of data.
- a cache where each physical address may only be mapped to one cache line, indexed using the low bits of the address. Simple but highly prone to allocation conflicts.
- Direct memory access - the ability of a hardware device such as a disk drive or network interface to access main memory without intervention from the CPU, provided by one or more DMA channels in a system.
- (Digital Video Disc or Digital Versatile Disc) - an optical compact disc - of the same dimensions as compact discs (CDs), but store more than six times as much data.
- Digital Visual Interface (DVI) is a video display interface developed by the Digital Display Working Group (DDWG). The digital interface is used to connect a video source to a display device, such as a computer monitor.
- a standard-sized area for adding hardware (hard drives, CD drives, etc.) to a computer.
- (Dynamic random-access memory) - a type of random-access memory that stores each bit of data in a separate capacitor within an integrated circuit and which must be periodically refreshed to retain the stored data.
- refers to a superscalar pipeline capable of executing 2 instructions simultaneously.
- a printed circuit board that can be inserted into an electrical connector, or expansion slot on a computer motherboard, backplane or riser card to add functionality to a computer system via the expansion bus. An expansion bus is a computer bus which moves information between the internal hardware of a computer system (including the CPU and RAM) and peripheral devices. It is a collection of wires and protocols that allows for the expansion of a computer.
- A hardware device or software to protect a computer from viruses, malware, trojans etc.
- fixed programs and data that internally control various electronic devices.
- a data storage medium that is composed of a disk of thin, flexible ("floppy") magnetic storage medium encased in a square or rectangular plastic shell.
- a device for reading floppy disks.
- a type of non volatile computer storage chip that can be electrically erased and reprogrammed.
- a non-volatile storage device that stores data on rapidly rotating rigid (i.e. hard) platters with magnetic surfaces.
- the physical components of a computer.
- (High-Definition Multimedia Interface) - a compact interface for transferring encrypted uncompressed digital audio and video data to a device such as a computer monitor, video projector or digital television.
- a memory architecture where program machine code and data are held in separate memories, more commonly seen in microcontrollers and digital signal processors.
- any peripheral equipment used to provide data and control signals to an information processing system.
- the communication between an information processing system (such as a computer), and the outside world.
- (Input/Output Operations Per Second, pronounced eye-ops) - a common performance measurement used to benchmark computer storage devices like hard disk drives.
- a group of several bits in a computer program that contains an operation code and usually one or more memory addresses.
- a cache in a CPU or GPU servicing instruction fetch requests for program code (or shaders for a GPU), possibly implementing modified Harvard architecture if program machine code is stored in the same address space and physical memory as data.
- A stage in a pipeline that load the next instruction referred to by the program counter.
- an input device, partially modeled after the typewriter keyboard, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches.
- instructions used to transfer data between memory and processor registers.
- An instruction set architecture where arithmetic/logic instructions may only be performed between processor registers, relying on separate load/store instructions for all data transfers.
- memory associated closely with a processing element, e.g. a cache, scratchpad, the memory connected to one processor node in a NUMA or COMA system, or device memory (such as VRAM) in an accelerator.
- powerful computer used mainly by large organizations for bulk data processing such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing.
- the largest random accessmemory in a memory hierarchy (before offline storage) in a computer system; i.e. distinct from caches or scratchpads; usually consists of DRAM.
- the address of a location in a memory or other address space.
- a memory architecture in a computer system, e.g. NUMA, uniform memory access, COMA, etc.
- The pattern with which software or some other system (an accelerator , or DMA channel) accesses memory, affecting locality of reference and parallelism.
- a variation of Harvard architecture used for most CPUs with separate non-coherent instruction and data caches (assuming that code is immutable), but still mirroring the same main memoryaddress space, and possibly sharing higher levels of the same cache hierarchy
- the central printed circuit board (PCB) in many modern computers which holds many of the crucial components of the system, while providing connectors for other peripherals.
- devices that are used to store data or programs on a temporary or permanent basis for use in an electronic digital computer.
- an electronic visual display for computers.
- a pointing device that functions by detecting two-dimensional motion relative to its supporting surface; motion is usually mapped to a cursor in screen space; typically used to control a graphical user interface on a desktop computer or for CAD etc.
- small connectors used on some laptops and other systems in place of the standard VGA connector.
- a layer of hardware-level instructions involved in the implementation of higher level machine code instructions in many computers and other processors.
- a type of read-only memory (ROM) whose contents are programmed by the integrated circuit manufacturer.
- a collection of computers and other devices connected by communications channels, e.g. by ethernet or wireless networking
- also referred to as LAN card and network card.
- Non-uniform memory access
- a computer network on a single semiconductor chip, connecting processing elements, fixed function units or even memories and caches. Increasingly common in System on a chip designs.
- memory that can retain the stored data even when not powered.
- random-access memory that retains its data when power is turned off.
- a disk drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical discs.
- the set of software that manages computer hardware resources and provide common services for computer programs, typically loaded by the BIOS on booting.
- Several bits in a computer programinstruction that specify which operation to perform.
- another name for a USB flash drive.
- a device attached to a computer but not part of it.
- Any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end user, with no intervening computer operator.
- Converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage.
- The pre-loading of instructions or data before needed either by dedicated cache control instructions or predictive hardware, to mitgate latency.
- A peripheral which produces a text or graphics of documents stored in electronic form, usually on physical print media such as paper or transparencies.
- refers to a level of semiconductormanufacturing technology, one of several successive transistor shrinks.
- a processor in a multiprocessor system or cluster, connected by dedicated communication channels or a network.
- an electronic circuit (either a microprocessor or an internal component of one) that may function autonomously or under external control, performing arithmetic and logic operations on data, possibly containing local memory, and possibly connected to other processing elements via a network, network on a chip, or cache hierarchy.
- the process of pre-loading instructions or data into a cache ahead of time, either under manual control via prefetch instructions or automatically by a prefetch unit which may use runtime heuristics to predict the future memory access pattern.
- Power supply unit - A unit of the computer that converts mains AC to low-voltage regulated DC for the power of all the computer components.
- Programmable Read-Only Memory - a type of non-volatile memory chip that may be programmed after the device is constructed.
- Peripheral Component Interconnect Express - a computer expansion bus standard designed to replace the older PCI, PCI-X, and AGP bus standards.
- PCI-eXtended - a computer bus and expansion card standard that enhances the 32-bit PCI Local Bus for higher bandwidth demanded by servers.
- (Redundant Array of Independent Disks) - data storage schemes that can divide and replicate data across multiple hard disk drives in order to increase reliability, allow faster access, or both.
- Random-access memory - a form of computer data storage that allows data items to be accessed (read or written) in almost the same amount of time irrespective of the physical location of data inside the memory. RAM contains multiplexing and demultiplexing circuitry to connect the data lines to the addressed storage for reading or writing the entry. Usually more than one bit of storage is accessed by the same address, and RAM devices often have multiple data lines and are said to be '8-bit' or '16-bit' etc. devices. In today's technology, random-access memory takes the form of integrated circuits.
- Read Only Memory - a type of memory chip that retains its data when its power supply is switched off.
- a computer which may be used to provide services to clients.
- computer programs and other kinds of information read and written by computers.
- Single in-line memory module - a type of memory module containing random access memory used in computers from the early 1980s to the late 1990s.
- (or solid-state disk or electronic disk) a data storage device that uses integrated circuit assemblies as memory to store data persistently. It is also referred to as a solid-state disk, but it contains neither an actual disk nor a drive motor to spin a disk.
- Static random-access memory - a type of semiconductormemory that uses bistable latching circuitry to store each bit. The term static differentiates it from DRAM which must be periodically refreshed.
- an internal expansion card that facilitates economical input and output of audio signals to and from a computer under control of computer programs. It is also referred to as an audio card.
- Synchronous dynamic random access memory - dynamic random access memory that is synchronized with the system bus.
- a high-speed, high-capacity alternative to the 90 mm (3.5 in), 1.44 MB floppy disk. The SuperDisk hardware was created by 3M's storage products group Imation in 1997.
- A peripheral storage device that allows only sequential access, typically using magnetic tape.
- An electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system.
- Also known as a touchpad; a pointing device consisting of specialized surface that can translate the motion and position of a user's fingers or a stylus to a relative position on a screen.
- a cache of decoded micro-operations in a CISC processor (e.g x86). 
- Universal Serial Bus - a specification to establish communication between devices and a host controller (usually a personal computers).
- A flash memory device integrated with a USB interface. USB flash drives are typically removable and rewritable.
- also referred to as a graphics card and several other names, a video card is an expansion card which generates a feed of output images to a display (such as a computer monitor).
- Video Graphics Array - the last graphical standard introduced by IBM to which the majority of PC clone manufacturers conformed.
- memory that requires power to maintain the stored information.
- A video camera that feeds its images in real time to a computer or computer network, often via USB, Ethernet, or Wi-Fi.
- A cache where store operations are buffered in cache lines, only reaching main memory when the entire cache line is evicted
- A cache where store operations are immediately written to the underlying main memory.
- The set of data used by a processor during a certain time interval, which should ideally fit into a CPU cache for optimum performance.
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Project Technical Feasibility Analysis
Report of technical feasibility on Blu-ray
Work as a team, I was in charge of the Blue-ray technical feasibility analysis of the whole complex project.
Technical feasibility analysis involves a review of all factors that makes the product happen, until it leaves the original owner's control or until someone else takes financial responsibility for it.
Technical feasibility should be based on verifiable data and contain sufficient information, and analysis so that an evaluation may be made on the technical feasibility of achieving the levels of income or production that would be project in financial statements.
Technical Feasibility-Work break-down structure
Table/chart/diagram/image missing. Please download the Word document to view it.
Technology and Equipment feasibility
1. What is Blu-ray Disc?
The Blu-ray Disc (BD) is a next-generation optical disc format for storing a large amount of data using a short wavelength blue laser to read and write.
The single largest feature of BD is its high-density data storage capacity of 25GB per layer on one sound.
This lets you store many hours of content, such as movies with HD resolution and high-quality music with loss-less audio compression.
2. Why is called Blu-ray Disc?
The laser beam that reads data from the new discs is blue instead of the red beam used for current DVDs and CDs. This new blue laser is at the heart of Blu-ray Disc Technology.
3. What are the planned formats for Blu-ray Disc?
BD-ROM - read-only format for software, games and movie distribution.
BD-R - write-once recordable format for HDTV recording and PC data storage.
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