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Everything about Companding
Telecommunications and signal processing technique
In telecommunications and signal processing, companding is a method of mitigating the detrimental effects of a channel with limited dynamic range. The name is a portmanteau of the words compressing and expanding, which are the functions of a compander at the transmitting and receiving ends, respectively. The use of companding allows signals with a large dynamic range to be transmitted over facilities that have a smaller dynamic range capability. Companding is employed in telephony and other audio applications such as professional wireless microphones and analog recording. Wikipedia →
🧭 Start here: a 6-step reading path
- Read the overview: CompandingA 5-minute orientation
- Skim a recent paper: A low complex PTS-SLM-Companding technique for PAPR reduction in 5G NOMA waveformInfluential work since 2022
- Pick up a classic book: Low-voltage CMOS log companding analog designThe most-reprinted book on the subject
- Read the landmark paper: Reduction of peak-to-average power ratio of OFDM system using a companding techniqueCited 367 times
- Go sideways: Mu-law algorithmA closely related topic
- Go sideways: Pulse-code modulationA closely related topic
📖 Definitions
Noun A process in which noise in a signal is reduced by selective compression and expansion
🗂️ The subject at a glance
🏆 Landmark papers (most cited)
Reduction of peak-to-average power ratio of OFDM system using a companding technique
Exponential companding technique for PAPR reduction in OFDM systems
Companding current-mode integrator: A new circuit principle for continuous-time monolithic filters
Externally linear, time-invariant systems and their application to companding signal processors
2-D companding for noise reduction in strain imaging
Compressing and companding high dynamic range images with subband architectures
Nonlinear Companding Transform for Reducing Peak-to-Average Power Ratio of OFDM Signals
Companding Transform for Reduction in Peak-to-Average Power Ratio of OFDM Signals
🆕 Influential since 2022
A low complex PTS-SLM-Companding technique for PAPR reduction in 5G NOMA waveform
Nonlinear companding transforms for reducing the PAPR of OTFS signal
Reduction of PAPR in OTFS using normalized μ ‐law and A ‐law companding transform
PAPR in AFDM: Upper Bound and Reduction With Normalized μ-Law Companding
Channel-Robust Automatic Modulation Classification Using Companding Spectral Quotient Cumulants
📚 Books worth reading
Low-voltage CMOS log companding analog designFrancisco Serra-Graells · 2003- 📕Digital soundN. H. C. Gilchrist · 1984
- 📕The intelligibility of amplitude companded sideband modulation compared to conventional frequency modulationW. A. Kissick · 1989
- 📕A digital compander for audio signalsMichael Fitzpatrick · 1978
- 📕The performance of amplitude companded sidebandWilliam L Kissick · 1986
- 📕Amplitude companded sideband transceiversNational Institute of Justice (U.S.) · 1989
- 📕Implementation of amplitude moduation companding using a digital signa l processorC. R. Nokes · 1994
Low-voltage CMOS log companding analog design · 2003
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
🔗 Related topics
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- A-law algorithm Audio quality comparison 16-bit linear PCM (reference/original) 8-bit A-law PCM 8-bit linear PCM Problems playing these files? See media help. An A-law…
- Audio bit depth In digital audio using pulse-code modulation (PCM), bit depth is the number of bits of information in each sample, and it directly corresponds to the resolution…
- Adaptive differential pulse-code modulation Adaptive differential pulse-code modulation (ADPCM) is a variant of differential pulse-code modulation (DPCM) that varies the size of the quantization…
- Digital-to-analog converter In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal. An analog-to-digital…
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- G.711 G.711, Pulse code modulation (PCM) of voice frequencies, is a narrowband audio codec originally designed for use in telephony that provides toll-quality…