Video and Audio Abbreviations and specialised terms

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found in electronics, various pieces of electronic equipment and schematics / circuit diagrams.

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Video, VCR and TV, Oscilloscope Abbreviations

A        Audio or analogue/analog
AC        Alternating Current 
ACC        Automatic Color Control 
ACC	ACC(essory)
A/C        Audio and Control 
AC. O/EE        AC Online/EE
AD REC        Audio Delayed Rec
ADJ        ADJust(ment) 
A DUB        Audio Dubbing
AFADE        Audio Fade
AFC        Automatic Frequency Control 
AF CS        AF chip select
AFC S C        AFC S Curve
AFT        Automatic Fine Tuning 
AGC        Automatic Gain Control 
AH        Audio Head 
AL        ALways (voltage) 
ALC        Automatic Level Control 
A OEP        Audio overlap pulse
A-SW.P        Audio SWitching Pulse
A-MUTE        Audio MUTE
ANT         ANTenna
APC        Automatic Phase Control
ARFC        Audio RF Signal
ART.V        Artificial Vertical Sync Signal
A TR        Audio tracking
A/VS/S        AV Sw/ Serial
AV CNT/CTL  AV Control  
ASSY        ASSemblY
+B        Power Rail (+)
BAL        BALance 
BAT / BATT        Battery
BDOWN        Break DOWN 
BF        Burst Flag Pulse
BF / BUF        Buffer
BGP        Burst Gate Pulse 
BLK        BLocK or BLacK 
BIL        Bilingual
BI/MI        Bilingual/Mix
BLK        Blanking
BM        Balanced Modulator
BOP        Blank Output Pulse 
BPF        Band Pass Filter 
BS        Bus
BU        Back Up (voltage) 
B/W        Black and White 
B Y KB        B-Y Carrier Balance
C        Chroma or Colour 
CAP EC / ET        Capstan Torque Control
CAP m        Capstan Motor
CAPVM        Capstan motor current
CAS        CASsette
CCD        Charge Coupled Device 
CCIR        Comit Consultatif International des Radio communications 
CCN        Playback Control Signal (-)
CCP        Playback Control S (+)
CCW        Counter gain control
CDS        CCD output signal
CFM        Chroma field memory
CGC        Chroma gain control
CH(ch)        CHannel (channel) 
CHN         Control Signal (+)
CHP        Control S. (-)
CHR MIX        character mix
CHROMA  CHROMinAnce
CINEM        Cinema
CKL        Catch LoCK
CKS        Shift LoCK / Serial cloCK
CL / CLK        CLocK 
CLP        CLamP
CMEM        Chroma memory signal
CMO        Chroma memory output
COL/B/W/NOR  Colour/ Black&White/Normal
CM        Capstan Motor 
CN        CoNnector 
COMP        COMParator 
CP        clamp pulse
CP0B        0B clamp pulse
CS        Chip Select
CSW        Cassette SWitch 
CSYNC        Composite SYNC 
CTL        ConTrol 
CUE        CUE 
CW        Clock Wise
CYL ET        Cylinder Torque Control
CYLVM        Cylinder motor current
D        Digital , Data , D-type flip flop
D        Delay
DAC        Digital to Analog Converter 
DAREC        Delayed Audio Recording
DC        Direct Current 
DEF        DEFeat
DEMOD        DEMODulator 
DET        DETetct (DETector) 
D FM REC  Delayed FM Recording
DL        Delay Line 
DM        Drum Motor 
DOC        Drop Out Compensator 
D.P.E        Drum Phase Error 
D.PG        Drum Pulse Generator 
DS        Double sampling (pulse)
DSP        Digital signal process
E        Erase
ECM        Electric condenser mic
ECR        Error Torque Control
EE        Electronic to Electronic 
EE CS        Eeprom CS
EF        Emitter Follower 
EMPHA        EMPHAsis 
ENV        ENVelope 
ENV DET        Envelope level detect
EP        Extended Play (LP)
EP ROM        Erasable Programmable ROM 
EQ        EQualizer 
E. REC / EX REC        Except Recording
EZOOM        Electric Zoom
FE        Full track Erase 
F ENC        Focus encoder
FF        Flip-Flop or Fast Foward 
FG        Frequency Generator 
Fig        Figure 
FLD        FLuorescent Display 
FLY        FLYback / FLYing (Head)
FM        Frequency Modulation 
FMD REC        FM Audio Delay REC
FMOEM        Field Memory Enable
FN0        F Value
F0 (F zero )        Resonance Frequency 
FREQ        FREQuency 
FUL        FULl
GND        GrouND 
H        Horizontal / Head
HBR        High Bright 
H CLR        High Clear
HD        Horizontal Drive (pulse)
H FIT      Picture in height fit, aspect ratio
HLT        Hight Bright Signal
HP        Horizontal (sync) pulse 
HPF        High Pass Filter 
HQ        High Quality System 
HSS        Horizontal Sync Signal
HTR        Heater
IC        Integrated Circuit 
ID        IDentification 
IDL        IDLe (Voltage) 
IMS        Interactive Monitor System 
IN        INput
INS        INSert 
INV        INVerter / Invert
I/O        In / Out , Input/Output
IOU /IOV        R-Y Analogue Signal output
IS        Interlaced Scan
ITR        Instant Timer Recording
IRQ        Interrupt Request
JK        J-K type flip flop
JST        JuST
L        Left 
LB        Letter Box (aspect ratio)
LCH        Left Channel
LED        Light Emitting Diode 
LI BATT        Lithium Battery
LlM        LlMitter 
LM        Loading Motor 
LM STP        Loading Motor STop 
LP        Long Play 
LPF        Low Pass Filter 
LPTRI        LP Trick Play
LSN        LiSteN
M        Monitor
MAX        MAXimum
MD        Modulator
MES / MESE / ME-SECAM  Middle East SECAM 
MF F        Manual Focus Far
MF N        Manual focus near
MIC        MICrophone
MI-COM        Micro COMputer 
MM        Mono-stable Multi 
MN        Monaurial / Mono
MOD     MODulator 
MRS     Motor ReverSe 
MSB        Most Significant Bit
MX        Mix
NAP     Ntsc Amusement Pal 
N A R        Normal Audio Recordng
N DE        Non Linear De-Emphasis
N LE        Non Linear Emphasis
NG     Noise Gate 
NICAM     Near Instanteneous Compand Audio Multiplex 
NOL        PAL / 4.43 NTSC / 3.58 NTSC
NON-LIN        NON-LINear 
NRD        Non Rer Data
NRE        Read enable input 
N.T.S.C.     National Television System Committee 
NWE        Write Enable Input
OE        Output Enable
OP        Operational Amplifier
OSC     OSCillator 
OSD        On Screen Display
OTR        One Touch Recording
OUT        OUTput
P        Phone (Headphone) / Power
PAL     Phase Alternation by Line 
PB     Play Back 
PCB (P.C.B)  Printed Circuit Board 
PCBM(B-Y)        B-Y Carrier Balance
PCBM(R-Y)        R-Y Carrier Balance
P-COM     Phase COMparator 
P DOWN        Power DOWN 
PDA        Post Deflection Accelearation (Voltage)
PDC        Programme Delivery Control
PEDE Cont        Pedestal Control
PFG        PG / FG
PG     Pulse Generator 
PHOTSN        Photo-Sensor
PICT        PICTure
P.I.P     Picture In Picture 
PL, PLG     PLunger (PLunGer) 
PLS        PuLSe
PLY        PLaY
PO        POsition
POR        Power on Reset
PREBLK        Pre Blanking
PRG (PGM)  PRoGram (ProGraM) Programme
PS        Pan Scan (4:3 aspect ratio)
PS        Progressive Scan
PU     Pick UP (head, pulse) 
PWM        Pulse Width Modulator
PWR     PoWeR 
Q     Quality factor 
R     Right 
RAD        Read Address Data
RAE        Read Address Enable
RAM     Random Access Memory 
R/B        Ready/Busy
RCH        Right Channel
RE        Read Enable
REC     RECord 
REEL-T        Reel Pulse ( Take - Up)
REEL-S        REEL pulse (Supply)
REF     REFerence 
REF-V     REFerence Vertical signal 
REG     REGulator 
RERASE        Rotary Erase Head
REV        REVerse
REV (REVW)  REView (REVieW) 
REW     REWind 
RF     Radio Frequency 
ROM     Read Only Memory 
ROT        ROTary
R.S SW     Record Safety SWitch 
RST (RES) R.ST  ReSet (RESet) 
RSTR        Reset Read
RSTW        Reset Write
RVS     ReVerSe 
RX        Receive
R-Y KB        R-Y Carrier Balance
S     Sensor, Shield , Supply (Side), Supply (voltage), Safety
SAW     Surface Acoustic Wave 
SBD        Serial Data
SBO        Serial Output
SC     SimulCast 
S CLK / SC / SCK     Serial CLocK 
SECAM     SEquentiel Couleur A Memoire 
SEL         SELect
S & H     Sample and Hold 
SIF        Sound Intermediate Frequency
S LED        Still LED
SLP     Super Long Play 
SNS        SeNSor
SP     Standard Play 
SPD     SPeeD 
S/P/N        Secam/Pal/NTSC
SRP     Supply Reel Pulse 
SRV     SeRVo 
SOW     Sync On Word 
SS        Still / Stop
SSS        Slow/Still/Stop
S-TAB        Safety Tab
STBY     STandBY 
S.VHS     Super VHS 
SW     SWitch 
SW 5 DET  Switch 5V Detect
SW'NG     SWitchiNG 
SWP     SWitching Pulse 
SYNC     SYNChronize (ation)
SYSCON        System Control
T        Take-up (side) , Timer, Tuner, Tape
T-AUDIO        Tuner AUDIO 
TB        Time Base
TL        Torque Limit
TLK        Talk
T-PHOTO        Take-up photo transistor
TPZ (TRAPE)  TraPeZoid (TRAPEzoid) (waveform)
TRFIX        Tracking Fix
TRK     TRacKing 
TRP / T-RL PLS     Take up Reel Pulse 
TU        TUner
T/U     Take Up 
TV     TeleVision 
TX        Transmit
TXT        TeXT
UHF     Ultra High Frequency 
UNR     UNRegulated (voltage) 
UVSEL        U/V Select
V     Vertical or Video 
VASS     Video Address Search System 
VCO     Voltage Controlled Oscillator 
VCTL        0 Voltage Charge Control
VD        ViDeo
VD        Vertical Drive (pulse)
VDREC        Video Delayed REC
VH     Video Head 
VHF     Very High Frequency 
VHS     Video Home System
VIF     Video Intermediate Frequency 
VISS     Video Index Search System 
VJ     Video Judge 
VM     Voltage for Memory / Monitor Voltage
VMD         Velocity Mode Data
VOB     Video On Blank 
VORP        Video Overlap
VOW     Video On Word 
VP     Vertical (sync) Pulse 
VPS     Video Program System 
VPT     Video Programming by video Text 
VRO        Reference Voltage Output
VSS        Vertical Sync Signal
VT     Voltage for Tuning 
WADE        Write Address Enable
WE        Write Enable
W FIT        Picture in width fit scan aspect ratio
WHT     WHiTe 
X        Oscillator , Crystal
Y     Luminance 
YNC        Noise Canceller (luminance)
YNR        Noise Reduction (luminance)
Z ENC        Zoom Encoder
2H     2 Hour (SP) 
4H     4 Hour (LP) 
6H     6 Hour (SLP/EP) 

AMP        AMPlifier
CD        Compact Disc
D        Digital
D/A        Digital to Analogue
DAT        Digital Audio Tape recorder
MC        Moving Coil
MM        Moving Magnet
SEA	Sound Effects Amplifier
TR        TRansistor
V.AMP        Voltage AMPlifier
V.DISC        Video DISC
VR        Variable Resistor / resistance
VTR        Video Tape Recorder
        

  
AM        Amplitude Modulation
BATT        BATTery
BUFF        BUFFer
H        High
IF        Intermediate Frequency
IHF        Institut of High Fidelity
IND        INDicator
I/O        In/Out
JW        Jumper Wire
L        Low
LCD        Liquid Crystal Display
Lch        Left chennel
LW        Long Wave (Frequency)
MEMO        MEMOry
MIN        MINimum
MIX        MIXing
MPX        MultipleX
MW        Medium Wave
NC        No Connection
NFB        Negative Feed Back
PLL        Phase Locked Loop
Q.D        Quadrature Detector
Rch        Right channel
SEG        SEGment
SELE        SELEctor
SENS        SENSitivity
SIG        SIGnal
S/N        Signal to Noise ratio
SSG        Standard Signal Generator
STD        STandarD
THD        Total Harmonic Distortion
TP        Test Point
X'TAL, XTL        Crystal
        

        
AFL		Normal Levels
AR        Anti-Recording
AT BIAS        Auto Tuning BIAS
ATT        ATTenuator
BEF        Band Elimination Filter
BSS        Blank Search System
CAP M        CAPstan Motor
CONT        CONTinuence
CR		Control Room
CRLP        Computer Recording Level Processing
CS        Chip Select
DI	Direct Injection - conversion of short distance signal leads, grounf referenced, 
eg "mono" 1/4 inch plugs to long distance balanced line eg "stereo" 1/4 inch/3 pin XLR
DISCRI        DISCRIminator
DUB        DUBbing
EQ		Equalisation (Bass, Mid, Treble filters )
EZ		Signal Level & Impedance
FF , F.FWD        Fast Forward
FWD        FoeWarD
Ground Lift	Associated with DI boxes and mixers introducing 2 earth points and 
so hum loop situation possible, this cuts one of the grounds and also 
disconnects the phantom DG
IPLS        Instant Program Location System
Mid scoop 	 "smiley face" equalisation curve, attenuating a big chunk of
 midrange frequencies because of a style of bass guitar playing overemphasises 
these frequencies
MIN        MINute
MML        Maximum Modulation Level
MOL        Maximum Output Level 
NORM        NORMal
NR        Noise Reduction
OL		Overload
P        Pulse
PAN		 Left /Right Sound image movement / balance
PCD	Pitch Circle Diameter (of speaker mounting holes)
Phantom		48V DC for powering condenser microphones
PFL		Set Levels
QMSS        Quick Memory Search System
QR        Quick Reverse
REV        REVerse
ROT        ROTation
SEC        SECond
SEPP        Single Ended Push Pull
SPECT        SPECTrum
SYSCON        SYStem CONtrol
TRIG        TRIGger
TRS		Tip-Ring-Sleeve (connecting parts of 1/4 inch plug , stereo) for Balanced Lines
TS		Tip_Sleeve (connecting parts of 1/4 inch plug , mono) for Un-Balanced Lines
VOL        VOLume
VOLT        VOLTage
X1        Normal speed
X2        Double speed
        
        

A-D        Analogue to Digital (converter)
ATIP        Absolute Time In Pregroove 
BCD        Binary Coded Decimal
BPI        Bits per Inch
CIRC        Cross Interleaving & Reed solomon Coding
CLV        Constan Linear Velocity
CP        Clock Pulses
CRCC        Cyclic Redundancy Check Codes
D Level        Decision Level
DAC        Disc Application Codes
DAD        Digital Audio Disc
DEM        Dynamic Element Matching
DPD        Differential Phase Detection
DSV        Digital Sum Value
EFM        Eight to Fourteen Modulation
EX-OR        Exclusive OR
FCI        Flux Changes per Inch
FIR        Finite Impulse Response
FP        Front Pulse
FPG        Front Pulse Gate
F        Frequency of Sampling
GF        Horizontal & Vertical
H & V        Infinite Impulse Response
IIR        Kilo Bits
L,L1,L2 etc        Data for Left channel
LSB        Least Significant Bit
Mb        Mega Bits
MDA        Motor Drive Amplifier
MFM        Modified Frequency Modulation
MM        Mono-stable Multivibrator
M2FM        Modified Modified Frequency Modulation
MOD2        Modulo 2 (addition )
MP        Microprocessor
MSB        Most Significant Bit
NA        Numerical Aperture
NRZ        Non Return to Zero
NRZ-1        Non Return to Zero Inverted
OPC        Optimum Power Control
P        Parity Data
PAM        Pulse Amplitude Modulation
PCA        Program Calibration Area
PCM        Pulse Code Modulation
PD        Phase Detector
PE        Phase Encode
PNM        Pulse Number Modulation
PPM        Pulse Phase Modulation
PWM        Pulse Width Modulation
Q        Parity Data
R,R1,R2,etc        Data for Right channel
RAM        Random Access Memory
RPG        Rear Pulse Gate
SCOOP        Self Coupled Optical Pick-up

A
ABS average busy stream 
ALU arithmetic logic unit
API Application Programming Interface
B
BIST built-in self test
BCD binary coded decimal
BP Base Page
C
CDet collision detect
CPU central processing unit
CRC cyclic redundancy check
CSMA carrier sense multiple access
E
EMI electromagnetic interference
EOM end of message
ESD electrostatic discharge
H
HS handshake
I
I2C Inter-Integrated Circuit (Philips trademark)
IR Infrared
L
LRC Longitudinal Redundancy Check
LSB least significant bit/byte
LVI low-voltage inhibit 
M
MAC media access control
MCU microcontroller unit
MIP Microprocessor Interface Program
MPU microprocessor unit
MSB most significant bit
N
ND network diagnostic

NEC National Electric Code
NM network management
NPO non-polarized
P
PAL programmable array logic
PCB printed circuit board
PCLTA PC LonTalk Adapter
PTC positive temperature coefficient
R
RF radio frequency
RFI radio frequency interference
S
SCL serial clock
SCR silicon-controlled rectifier
SDA serial data
SIDAC trademark of Teccor Corp.
SLTA/2 Serial LonTalk Adapter
SMT surface mount technology
SNVT Standard Network Variable Type
T
TOS top of stack
V
VLSI very large-scale integration
X
XIF external interface data