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  2. Non-return-to-zero - Wikipedia

    en.wikipedia.org/wiki/Non-return-to-zero

    The binary signal is encoded using rectangular pulse-amplitude modulation with polar NRZ(L), or polar non-return-to-zero-level code. In telecommunications, a non-return-to-zero (NRZ) line code is a binary code in which ones are represented by one significant condition, usually a positive voltage, while zeros are represented by some other significant condition, usually a negative voltage, with ...

  3. Line code - Wikipedia

    en.wikipedia.org/wiki/Line_code

    An example of coding a binary signal using rectangular pulse-amplitude modulation with polar non-return-to-zero code An example of bipolar encoding, or AMI. Encoding of 11011000100 in Manchester encoding An example of differential Manchester encoding An example of biphase mark code An example of MLT-3 encoding

  4. Unipolar encoding - Wikipedia

    en.wikipedia.org/wiki/Unipolar_encoding

    NRZ (Non-Return-to-Zero) - Traditionally, a unipolar scheme was designed as a non-return-to-zero (NRZ) scheme, in which the positive voltage defines bit 1 and the zero voltage defines bit 0. It is called NRZ because the signal does not return to zero at the middle of the bit, as instead happens in other line coding schemes, such as Manchester ...

  5. Coded mark inversion - Wikipedia

    en.wikipedia.org/wiki/Coded_mark_inversion

    CMI line coding. In telecommunication, coded mark inversion (CMI) is a non-return-to-zero (NRZ) line code. It encodes zero bits as a half bit time of zero followed by a half bit time of one, and while one bits are encoded as a full bit time of a constant level. The level used for one bits alternates each time one is coded.

  6. Pulse-code modulation - Wikipedia

    en.wikipedia.org/wiki/Pulse-code_modulation

    Linear pulse-code modulation (LPCM) is a specific type of PCM in which the quantization levels are linearly uniform. [5] This is in contrast to PCM encodings in which quantization levels vary as a function of amplitude (as with the A-law algorithm or the μ-law algorithm ).

  7. Hybrid ternary code - Wikipedia

    en.wikipedia.org/wiki/Hybrid_ternary_code

    During the violation period for a run of 1s or 0s, it operates on the same encoding rule of the polar RZ but with pulse occupancy of full period. NRZ-L and polar RZ codes have deficiencies compared to the proposed H-ternary encoding scheme. NRZ-L code lacks sufficient timing information when the binary signal remains at one level in of either 1 ...

  8. Return-to-zero - Wikipedia

    en.wikipedia.org/wiki/Return-to-zero

    The binary signal is encoded using rectangular pulse-amplitude modulation with polar return-to-zero code. Return-to-zero (RZ or RTZ) describes a line code used in telecommunications signals in which the signal drops (returns) to zero between pulses. This takes place even if a number of consecutive 0s or 1s occur in the signal. The signal is ...

  9. Carrier-Suppressed Return-to-Zero - Wikipedia

    en.wikipedia.org/wiki/Carrier-Suppressed_Return...

    Carrier-Suppressed Return-to-Zero (CSRZ) is an optical line code.In CSRZ the field intensity drops to zero between consecutive bits (), and the field phase alternates by π radians between neighbouring bits, so that if the phase of the signal is e.g. 0 in even bits (bit number 2n), the phase in odd bit slots (bit number 2n+1) will be π, the phase alternation amplitude.