variable-slope delta modulation

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• Continuously variable slope delta modulation — (CVSD or CVSDM) is a voice coding method. It is a delta modulation with variable step size (i.e. special case of adaptive delta modulation), first proposed by Greefkes and Riemens in 1970. CVSD encodes at 1 bit per sample, so that audio sampled… …   Wikipedia

• continuously variable slope delta modulation —    (CVSD)    A type of delta modulation in which the size of the steps of the approximated signal are progressively increased or decreased as required to make the approximal signal closely match the input analog wave …   IT glossary of terms, acronyms and abbreviations

• Delta modulation — Principle of the delta PWM. The output signal (blue) is compared with the limits (green). These limits correspond to the reference signal (red), offset by a given value. Every time the output signal reaches one of the limits, the PWM signal… …   Wikipedia

• Modulation — For musical change of key, see Modulation (music). For other uses, see Modulation (disambiguation). Passband modulation v · d · e …   Wikipedia

• Delta-sigma modulation — Delta sigma (ΔΣ; or sigma delta, ΣΔ) modulation is a method for encoding high resolution or analog signals into lower resolution digital signals. The conversion is done using error feedback, where the difference between the two signals is… …   Wikipedia

• CVSD — Continuous Variable Slope Delta (Academic & Science » Geology) **** Continuously Variable Slope Delta Modulation (Computing » Telecom) **** Continuously Variable Slope, Delta Modulation (Computing » Telecom) …   Abbreviations dictionary

• Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… …   Wikipedia

• List of codecs — The following is a list of codecs. Audio codecs Non compression formats * Audio Interchange File Format (AIFF, container format) * Resource Interchange File Format (RIFF, container format) * WAV – Microsoft WAVE format (format supports… …   Wikipedia

• Digital audio — Digital music redirects here. For a kind of modern music composed by digital means, see electronic music. A sound wave, in gray, represented digitally, in red (after quantization and zero order hold). Digital audio is sound reproduction using… …   Wikipedia

• Vocoder — A vocoder (  /ˈvoʊk …   Wikipedia

• FASCINATOR — is a series of Type 1 encryption modules designed in the late 1980s to be installed in Motorola digital capable voice radios. These radios were originally built to accept a DES based encryption module that was not approved by NSA for classified… …   Wikipedia