PCM

(communications) pulse-code modulation

PCM

(data)Pulse Code Modulation.

PCM

(company)Plug Compatible Manufacturer.

PCM

(1) See phase change memory.

(2) See also PMC ( programmable metallization cell).

(3) (Plug Compatible Manufacturer) An organization that makes a computer or electronic device that is compatible with an existing machine.

(4) (Pulse Code Modulation) The primary way analog audio signals are converted into digital form by taking samples of the waveforms from 8 to 192 thousand times per second (8 to 192 kHz) and recording each sample as a digital number from 8 to 24 bits long (see sampling). PCM data are pure digital audio samples, and they are the underlying data in several music file formats (see WAV, FLAC and AIFF).

Sound Cards Support PCM
For output, a sound card's audio-out port provides an analog signal to the speakers. Compressed formats such as MP3 and AAC are first converted to PCM, and the PCM data are then converted to analog (see D/A converter). Sound cards may also output PCM and other digital signals such as Dolby Digital (see S/PDIF). For input, an analog microphone is plugged into the audio-in port, and the sound card converts the analog signals to PCM.

PCM Ports on A/V Equipment
When ports on set-top boxes and Blu-ray/DVD players are labeled PCM or linear PCM (LPCM), they refer to uncompressed audio channels rather than encoded formats such as Dolby Digital, TrueHD, DTS and DTS-HD. PCM can be mono, stereo or have multiple channels for surround sound. See Bitstream mode and linear PCM.

It Started With the Telcos
PCM was introduced in the U.S. in the early 1960s when the telephone companies began converting voice to digital for transport over intercity trunks. See mu-Law.

It Starts as PCM

PCM is the primary way analog waves are converted into digital form for voice conversations as well as music. Codecs such as MP3 and AAC that compress the digital data further apply algorithms to the PCM samples in order to eliminate overlapping frequencies as well as sounds that are deemed inaudible to the human ear.

It Starts as PCM

PCM is the primary way analog waves are converted into digital form for voice conversations as well as music. Codecs such as MP3 and AAC that compress the digital data further apply algorithms to the PCM samples in order to eliminate overlapping frequencies as well as sounds that are deemed inaudible to the human ear.

It Starts as PCM

PCM is the primary way analog waves are converted into digital form for voice conversations as well as music. Codecs such as MP3 and AAC that compress the digital data further apply algorithms to the PCM samples in order to eliminate overlapping frequencies as well as sounds that are deemed inaudible to the human ear.

Another Approach to Sampling

Sony's SACD audio format uses Direct Stream Digital (DSD), a dramatic departure from PCM. Instead of turning samples into a number with a range of values, DSD samples are only 1-bit long (0 or 1), depending on whether the wave is moving up or down from the previous sample point (see DSD).

PCM

Acronym	Definition
PCM➣Pulse-Code Modulation
PCM➣Powertrain Control Module
PCM➣Phase-Change Memory (non-volatile computer memory)
PCM➣Principles of Clinical Medicine (various schools)
PCM➣Pro Cycling Manager (software)
PCM➣Per Calendar Month (accounting)
PCM➣Process Control Module
PCM➣Porsche Communication Management
PCM➣Phase Change Materials (intelligent textiles and fabrics)
PCM➣Punch(ed) Card Machine
PCM➣Project Cycle Management
PCM➣Primary Care Manager
PCM➣Personal Computer Magazine
PCM➣Presidenza del Consiglio dei Ministri (Italia)
PCM➣Protection Circuit Module
PCM➣Power Control Module
PCM➣Project and Construction Management (Canada)
PCM➣Precision Guided Munitions
PCM➣Professional Case Management (est. 1986)
PCM➣Process Control Management
PCM➣PC Magazine
PCM➣Pub Cardinal Marunouchi (Japan)
PCM➣Paracoccidioidomycosis (fungal infection)
PCM➣Process Communication Model (Kahler Communications)
PCM➣Project Control Manager
PCM➣Product Content Management (retail)
PCM➣Process Change Management (Sprint)
PCM➣Photochemical Machining (milling process)
PCM➣Please Call Me
PCM➣Professional Construction Management
PCM➣Product Cost Management (various companies)
PCM➣Paracetamol
PCM➣Professional Certified Marketer
PCM➣Political Campaign Management (various universities)
PCM➣Personal Computer Manufacturer
PCM➣Powercom
PCM➣Printer Cartridge Metric
PCM➣Pulse Code Modulation
PCM➣Paladin Core Model
PCM➣Port Connection Manager
PCM➣Phase Change Material
PCM➣Price-Cost Margin
PCM➣Prosperity Capital Management (various locations)
PCM➣Phase Contrast Microscopy
PCM➣Process Control Monitor
PCM➣Prospective Corps Members (National Youth Service)
PCM➣Pre-College Math (various schools)
PCM➣Pacific-Rim Conference on Multimedia
PCM➣Presidência do Conselho de Ministros (Portugal)
PCM➣Procurement Contract Management
PCM➣Program Committee Member
PCM➣Programme Cycle Management (various organizations)
PCM➣Percentage of Completion Method (accounting)
PCM➣Polarizable Continuum Model (computational chemistry)
PCM➣Phylogenetic Comparative Method
PCM➣Partido Comunista Mexicano (Spanish: Mexican Communist Party)
PCM➣Pre-College Mathematics (course)
PCM➣PCM Solicitors LLP (law firm; London, England, UK)
PCM➣Public Consultation Meeting (various organizations)
PCM➣Physics, Chemistry, Math
PCM➣Project Communications Management
PCM➣Peripheral Control Module (military communications project)
PCM➣Priority Call Management (Wilmington, MA)
PCM➣Per Cent Mille (nuclear reactors)
PCM➣Payments and Cash Management
PCM➣Professional Conference Management (various organizations)
PCM➣Physical Connection Management (FDDI)
PCM➣Process Construction Maintenance
PCM➣Personal Call Manager (telephones)
PCM➣Plug-Compatible Manufacturer
PCM➣Process Change Method (Software Engineering Institute method)
PCM➣Plug Compatible Mainframe
PCM➣Parallel Cache Management
PCM➣Policy Compliance Management (software)
PCM➣Patient Controlled Medication
PCM➣Pipeline Current Mapper (Radiodetection Ltd.)
PCM➣Personal Car Mileage (New York)
PCM➣Personnel Contamination Monitor
PCM➣Precision Craft Model
PCM➣Prairie-City Monroe (school district in Jasper County, Iowa)
PCM➣Plug-Compatible Machine
PCM➣Power Converter Module
PCM➣Package Command Manager (Microsoft SMS)
PCM➣Probability of Correct Message
PCM➣Party of Moldovan Communists
PCM➣Project Contribution Margin
PCM➣Pequot Capital Management (hedge fund)
PCM➣Palais des Congrès de Montréal
PCM➣PacketCable Multimedia (Worldgate)
PCM➣Plutonium Contaminated Material
PCM➣Professional Communications Management (various locations)
PCM➣Product Catalogue Management
PCM➣Protein Caloric Malnutrition
PCM➣Practical Christian Ministry
PCM➣Project Concurrence Memorandum (engineering)
PCM➣Phase-Controlled Magnetron
PCM➣Photo Contact Master
PCM➣Pipeline Construction Manager
PCM➣Pop Culture Madness (entertainment website)
PCM➣Palisade Capital Management, LLC
PCM➣Plug Compatible Module
PCM➣Printer Cartridge Metrics
PCM➣Parametric Cost Model
PCM➣Pie Chart Master
PCM➣Product Capacity Manager
PCM➣Process Control Manual
PCM➣Positive Control Material (nuclear weapons)
PCM➣Personal Communication Magazine (IEEE)
PCM➣Pole Changing Motor
PCM➣Program Cost Management
PCM➣Prework Communication Meeting (United Parcel Service)
PCM➣Pixel Correspondence Metric (automated image processing)
PCM➣Passive Countermeasure
PCM➣Personal Computer Module
PCM➣Programme Centre for Modernism
PCM➣Program Configuration Manager
PCM➣Pending Contractual Matter
PCM➣Point Code Mapping
PCM➣Principle-Centered Management
PCM➣Pyrotechnic Countermeasure
PCM➣Proposed Contract Modification
PCM➣Partition Control Master (Megasys)
PCM➣Port Controller Module (DSC)
PCM➣Preservation and Collection Maintenance (Cornell University; Ithaca, NY)
PCM➣Psuedo-Christian Moron
PCM➣Precision Cassette Mechanism
PCM➣Pneumatic Camshaft Motor (control device)
PCM➣Program Coordination Meeting
PCM➣Perfect Coverage Model
PCM➣Precast Cell Manufacturer
PCM➣Procurement Consultancy Manager
PCM➣Project Control Memorandum
PCM➣Production Cost Module
PCM➣Parti Communiste de la Martinique (French: Martinique Communist Party)
PCM➣Protein Channel Model(ing)
PCM➣Parish Communications Ministry
PCM➣Probability of Countermeasures
PCM➣Production Control Module
PCM➣Prescription Care Management
PCM➣Pancake Mafia (band)
PCM➣Poetry Combination Module (UK)
PCM➣Porsche Club Motorsport (French automobile club)
PCM➣Porci Con le Mount (World of Warcraft guild)

PCM

pcm

PCM

PCM

PCM

PCM

PCM

PCM

PCM

PCM

PCM