Bit-synchronous operation
Bit-synchronous operation is a type of digital communication in which the data circuit-terminating equipment (DCE), data terminal equipment (DTE), and transmitting circuits are all operated in bit syn...
Manchester code
In telecommunication and data storage, Manchester coding (also known as phase encoding, or PE) is a line code in which the encoding of each data bit has at least one transition and occupies the same t...
Manchester code - Wikipedia
Run-length limited
Run length limited or RLL coding is a line coding technique that is used to send arbitrary data over a communications channel with bandwidth limits. RLL codes are defined by four main parameters: m, ...
Bipolar violation
A bipolar violation, bipolarity violation, or BPV, is a violation of the bipolar encoding rules where two pulses of the same polarity occur without an intervening pulse of the opposite polarity. This...
Bipolar encoding
In telecommunication, bipolar encoding is a type of line code, where two nonzero values are used, so that the three values are +,-, and zero. Such a signal is called a duobinary signal. Bipolar encodi...
Bipolar encoding - Wikipedia
Ternary signal
In telecommunication, a ternary signal is a signal that can assume, at any given instant, one of three states or significant conditions, such as power level, phase position, pulse duration, or frequen...
Delay encoding
In telecommunications, delay encoding is the encoding of binary data to form a two-level signal where (a) a "0" causes no change of signal level unless it is followed by another "0" in which case a tr...
Modified Frequency Modulation
Modified Frequency Modulation, commonly MFM, is a run-length limited (RLL) coding scheme used to encode the actual data-bits on most floppy disks. It was first introduced in disk drives with the IBM 3...
Modified Frequency Modulation - Wikipedia
Code conversion
In telecommunication, the term code conversion has the following meanings: 1. Conversion of signals, or groups of signals, in one code into corresponding signals, or groups of signals, in another cod...
Alternate-Phase Return-to-Zero
Alternate-Phase Return-to-Zero (APRZ) is an optical signal format.In APRZ the field intensity drops to zero between consecutive bits (RZ), and the field phase alternates between neighbouring bits (AP)...
Alternate-Phase Return-to-Zero - Wikipedia
Scrambler
In telecommunications, a scrambler is a device that transposes or inverts signals or otherwise encodes a message at the transmitter to make the message unintelligible at a receiver not equipped with a...
Scrambler - Wikipedia
Hybrid ternary code
In telecommunications, the hybrid (H-) ternary line code is a line code that operates on a hybrid principle combining the binary non-return-to-zero-level (NRZ-L) and the polar return-to-zero (RZ) code...
Self-synchronizing code
In coding theory, especially in telecommunications, a self-synchronizing code is a uniquely decodable code in which the symbol stream formed by a portion of one code word, or by the overlapped portion...
6b/8b encoding
In telecommunications, 6b/8b is a line code that expands 6-bit codes to 8-bit symbols for the purposes of maintaining DC-balance in a communications system.Each 8-bit output symbol contains 4 zero bit...
Kasami code
Kasami sequences are binary sequences of length 2-1 where N is an even integer. Kasami sequences have good cross-correlation values approaching the Welch lower bound. There are two classes of Kasami s...
Non-return-to-zero
In telecommunication, a non-return-to-zero (NRZ) line code is a binary code in which 1s are represented by one significant condition (usually a positive voltage) and 0s are represented by some other s...
Non-return-to-zero - Wikipedia
Phase shaped binary transmission
The PSBT (Phase Shaped Binary Transmission) is a type of modulation format for digital transmissions.It is most commonly used in optical systems (WDM and OTDM) because of its increased tolerance to ch...
Phase shaped binary transmission - Wikipedia
Line code
In telecommunication, a line code (also called digital baseband modulation or digital baseband transmission method) is a code chosen for use within a communications system for baseband transmission pu...
Modified AMI code
Modified AMI codes are Alternate Mark Inversion (AMI) line codes in which bipolar violations may be deliberately inserted to maintain system synchronization. There are several types of modified AMI c...
Modified AMI code - Wikipedia
8b/10b encoding
In telecommunications, 8b/10b is a line code that maps 8-bit symbols to 10-bit symbols to achieve DC-balance and bounded disparity, and yet provide enough state changes to allow reasonable clock recov...
Carrier-Suppressed Return-to-Zero
Carrier-Suppressed Return-to-Zero (CSRZ) is an optical signal format. In CSRZ the field intensity drops to zero between consecutive bits (RZ), and the field phase alternates by π between neighbouring ...
Clock recovery
Some digital data streams, especially high-speed serial data streams (such as the raw stream of data from the magnetic head of a disk drive) are sent without an accompanying clock signal. The receive...
Group code recording
In computer science, group code recording (GCR) refers to several distinct but related encoding methods for magnetic media. The first, used in 6250 cpi magnetic tape, is an error-correcting code comb...
64b/66b encoding
In data networking and transmission, 64b/66b is a line code that transforms 64-bit data to 66-bit line code to provide enough state changes to allow reasonable clock recovery and facilitate alignment ...
2B1Q
Two-binary, one-quaternary (2B1Q) is a line code used in the U interface of the Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) and the high-bit-rate digital subscriber line (HDS...
Barker code
A Barker code or Barker sequence is a finite sequence of N values of +1 and −1,with the ideal autocorrelation property, such that the off-peak (non-cyclic) autocorrelation coefficients are as sm...
Barker code - Wikipedia
E-NRZ-L
In telecommunication, an enhanced-non-return-to-zero-level (E-NRZ-L) line code is a binary code in which 1s are represented by one significant condition (usually a positive voltage) and 0s are represe...
4B5B
In telecommunication, 4B5B is a form of data communications Block Coding. 4B5B maps groups of four bits onto groups of 5 bits, with a minimum density of 1 bits in the output. When NRZI-encoded, the 1...
Transition-minimized differential signaling
Transition-minimized differential signaling (TMDS) is a technology for transmitting high-speed serial data and is used by the DVI and HDMI video interfaces, as well as other digital communication inte...
Gold code
A Gold code, also known as Gold sequence, is a type of binary sequence, used in telecommunication (CDMA) and satellite navigation (GPS). Gold codes are named after Robert Gold. Gold codes have bounded...