{"id":307,"date":"2021-09-07T12:58:27","date_gmt":"2021-09-07T07:28:27","guid":{"rendered":"https:\/\/www.tescaglobal.com\/blog\/?p=307"},"modified":"2022-10-19T09:16:53","modified_gmt":"2022-10-19T03:46:53","slug":"delta-modulation-demodulation","status":"publish","type":"post","link":"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/","title":{"rendered":"Delta Modulation &#038; Demodulation: Theory &#038; Applications"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a03878a1e475\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a03878a1e475\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#What_is_Delta_Modulation\" title=\"What is Delta Modulation?\">What is Delta Modulation?<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta_modulation_in_Digital_Communication\" title=\"Delta modulation in Digital Communication:\">Delta modulation in Digital Communication:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta-Sigma_Modulation\" title=\"Delta-Sigma Modulation:\">Delta-Sigma Modulation:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta_Modulation_Applications\" title=\"Delta Modulation Applications:\">Delta Modulation Applications:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta_Modulation_Theory\" title=\"Delta Modulation Theory:\">Delta Modulation Theory:<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Adaptive_Delta_Modulation_Transmitter_and_Receiver\" title=\"Adaptive Delta Modulation Transmitter and Receiver:\">Adaptive Delta Modulation Transmitter and Receiver:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Adaptive_Delta_Modulation_Waveform\" title=\"Adaptive Delta Modulation Waveform:\">Adaptive Delta Modulation Waveform:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Advantages_of_Delta_Modulation\" title=\"Advantages of Delta Modulation:\">Advantages of Delta Modulation:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Disadvantages_of_Delta_Modulation\" title=\"Disadvantages of Delta Modulation:\">Disadvantages of Delta Modulation:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta_Modulation_Circuit\" title=\"Delta Modulation Circuit:\u00a0\">Delta Modulation Circuit:\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Difference_between_Delta_Modulation_and_Adaptive_Delta_Modulation\" title=\"Difference between Delta Modulation and Adaptive Delta Modulation:\">Difference between Delta Modulation and Adaptive Delta Modulation:<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Granular_Noise_in_Delta_Modulation\" title=\"Granular Noise in Delta Modulation:\">Granular Noise in Delta Modulation:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta_Modulation_and_Demodulation_Theory\" title=\"Delta Modulation and Demodulation Theory:\">Delta Modulation and Demodulation Theory:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.tescaglobal.com\/blog\/delta-modulation-demodulation\/#Delta_Modulation_and_Demodulation_Trainer_Kit\" title=\"Delta Modulation and Demodulation Trainer Kit:\">Delta Modulation and Demodulation Trainer Kit:<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p><span style=\"font-weight: 400;\">In this article, we will discuss <\/span><b>Delta modulation<\/b><span style=\"font-weight: 400;\"> and how it is used as a modulation technique for digital signaling systems. Let\u2019s get started without any ado:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is a type of modulation where the <\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/Amplitude\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">amplitude<\/span><\/a><span style=\"font-weight: 400;\"> of the carrier is varied in response to the instantaneous value of the input signal. In the case of delta modulation, the input signal is a digital signal. It can be regarded as a set of discrete values.<\/span><\/p>\n<p><b>Delta modulation<\/b><span style=\"font-weight: 400;\"> is a straightforward form of modulation. It is used in different digital communication systems.<\/span><\/p>\n<h1><span class=\"ez-toc-section\" id=\"What_is_Delta_Modulation\"><\/span><strong><span style=\"color: #e43023;\">What is Delta Modulation?<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><b>\u2018The conversion technique wherein the conversion from analog to digital and digital to analog signal is done for the transmission of voice information is known as delta modulation.\u2019<\/b><\/p>\n<p><a href=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC.jpg\"><img loading=\"lazy\" class=\" wp-image-308 aligncenter\" src=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC-300x197.jpg\" alt=\"delta-modulation-diagram\" width=\"646\" height=\"424\" srcset=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC-300x197.jpg 300w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC-370x243.jpg 370w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC-270x177.jpg 270w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC-570x374.jpg 570w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Delta-Modulation-Tx-using-IC.jpg 595w\" sizes=\"(max-width: 646px) 100vw, 646px\" title=\"\"><\/a><\/p>\n<p style=\"text-align: right;\"><em>Image Source: <a href=\"https:\/\/www.watelectronics.com\/\" target=\"_blank\" rel=\"nofollow noopener\">watelectronics.com<\/a>\u00a0<\/em><\/p>\n<p><span style=\"font-weight: 400;\">It doesn\u2019t focus on the quality, and the data can be reduced to the size of a 1-bit data stream.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this technique, the use of the predictive waveform coding technique is preferred for the conversion of the signal. Differential pulse code modulation increases the sampling rate so that the bandwidth of the signal can be decreased by reducing the number of steps.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Delta modulation is a form of signaling used primarily in data transmission systems. In delta modulation, a new bit is sent using a pulse of constant amplitude and a duration proportional to the value of the bit. The bit rate is constant, and the average power is reduced.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In simple words, it is a type of modulation that uses a PWM signal as a carrier and a digital modulating signal to represent a digital data stream.<\/span><\/p>\n<p><a href=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1.jpg\"><img loading=\"lazy\" class=\" wp-image-312 aligncenter\" src=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-300x100.jpg\" alt=\"tesca modulation and demodulation trainer kit image\" width=\"910\" height=\"303\" srcset=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-300x100.jpg 300w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-1024x341.jpg 1024w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-768x256.jpg 768w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-370x123.jpg 370w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-270x90.jpg 270w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-570x190.jpg 570w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1-740x247.jpg 740w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/Add-a-subheading-1.jpg 1200w\" sizes=\"(max-width: 910px) 100vw, 910px\" title=\"\"><\/a><\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/www.tescaglobal.com\/product\/delta-modulation-and-demodulation-trainer\" target=\"_blank\" rel=\"noopener\"><em>Go to the Product Page.<\/em><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Delta_modulation_in_Digital_Communication\"><\/span><span style=\"color: #e43023;\"><b>Delta modulation in Digital Communication:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Delta modulation is a digital modulation scheme. It is a type of <\/span><b>phase-shift keying<\/b><span style=\"font-weight: 400;\"> (PSK), i.e., a digital modulation scheme in which the phase of a reference signal is varied to convey information.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Delta modulation was introduced by <\/span><b>John R. Pierce<\/b><span style=\"font-weight: 400;\">, who also invented video telephony and the FM radio in his 1949 paper \u201cSome novel methods for transmitting the information.\u201d It is a technology that helps increase the speed of communication up to V2V and V2I communication. Using this modulation will help in increasing the speed of communication.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this technique, the amplitude of the modulating signal is made proportional to the instantaneous value of the desired information signal. This technique allows the transmission of data at a much higher bit rate than an analog carrier wave.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is used for the transmission of data over the telephone line, satellite link, etc. The object of delta modulation is to transmit a series of digital 1s or 0s at a high bit rate without introducing too much distortion. This is done by converting the message into the form of pulses whose widths represent 1s and 0s.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Delta-Sigma_Modulation\"><\/span><span style=\"color: #e43023;\"><b>Delta-Sigma Modulation:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Delta-sigma modulation is a technique of converting an analog signal into a digital one by increasing the sampling rate.<\/span><\/p>\n<p><b>Delta-sigma modulation (DSM)<\/b><span style=\"font-weight: 400;\"> is a method of encoding analog signals into digital form. It uses pulse-width modulation to encode the 1\u2019s and 0\u2019s that make up the signal, so it is different than conventional binary coding, which uses ones and zeros.<\/span><\/p>\n<p><a href=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator.png\"><img loading=\"lazy\" class=\" wp-image-309 aligncenter\" src=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator-300x146.png\" alt=\"delta-sigma-modulator-diagram\" width=\"676\" height=\"329\" srcset=\"https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator-300x146.png 300w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator-370x180.png 370w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator-270x131.png 270w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator-570x277.png 570w, https:\/\/www.tescaglobal.com\/blog\/wp-content\/uploads\/2021\/09\/delta-sigma-modulator.png 600w\" sizes=\"(max-width: 676px) 100vw, 676px\" title=\"\"><\/a><\/p>\n<p style=\"text-align: right;\"><em>Image Source: <a href=\"https:\/\/wiki.analog.com\/\" target=\"_blank\" rel=\"nofollow noopener\">wiki.analog.com<\/a><\/em><\/p>\n<p><span style=\"font-weight: 400;\">The advantage of this method is that fewer bits are needed to represent an analog signal, resulting in higher data rates for the same bandwidth.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The main difference between delta-sigma modulation and its predecessor, delta modulation, is that the quantization noise is removed through sigma-delta modulation before the signal is converted to analog. It is one of the most popular methods used for converting information from digital to analog form.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Delta_Modulation_Applications\"><\/span><span style=\"color: #e43023;\"><b>Delta Modulation Applications:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Below mentioned are some of the essential applications of the Delta modulation:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When it comes to voice transmission systems, Delta modulation is a highly preferred technique. It is a technique that is commonly used for telephone and radio communications.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Delta Modulation method is generally used for the encoding of signals from analog to PCM.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is also applied for signal conversion in television systems.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">One of the most critical applications of this technique is that it is used for real-time Signal Processing and database reduction in the ECG waveform.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This technique is helpful for the system wherein the data delivery at the receiver is important than its quality.<\/span><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Delta_Modulation_Theory\"><\/span><span style=\"color: #e43023;\"><b>Delta Modulation Theory:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">When we talk about one of the simplest forms of modulation them Delta modulation is the one that is the simplified form of differential pulse code modulation.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Delta modulation is well known for its simplicity because it is used as a simple quantizing strategy for constructing the encoded signals, which are over-sampled purposely, to increase the correlation between adjacent samples of the signal, which are seen in differential pulse code modulation. To increase the correlation of the signal, the sample interval is reduced by the modulation.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0It is a process that is mainly used for the transmission of voice information. It is instead a simplified way of differential pulse code modulation (DPCM). This method is used to convert or encode analog signals into digital signals; that\u2019s why it is also known as the game-changer revolution in the field of communication.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The process is to convert the high-bit-count, low-frequency digital signals into lower-bit-count and higher-frequency digital signals wherein the signals are converted into analog as part of a digital-to-analog converter (DAC). There are many methods used in digital signal processing for communication systems, from which some are pulse code modulation, delta modulation, differential pulse code modulation, etc.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The basic principal of this technique has three formulas which are=<\/span><\/p>\n<p><span style=\"font-weight: 400;\">1.e(nTs) = m(nTs) \u2013 mq (nTs \u2013 Ts )<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2.eq(nTs) = \u03b4 sgn[e(nTs)]<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3.mq(nTs) = mq(nTs \u2013 Ts) + eq(nTs)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Where the symbol stands for=<\/span><\/p>\n<p><span style=\"font-weight: 400;\">m(t)-input signal<\/span><\/p>\n<p><span style=\"font-weight: 400;\">mq(t)-staircase approximation<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ts-sampling period<\/span><\/p>\n<p><span style=\"font-weight: 400;\">e(nTs)-error signal representing the difference between the present sample value m(nTs) of the input signal and the latest signal. eq(nTs) \u2013 quantized version of e(nTs).<\/span><\/p>\n<p><strong>The modulation is affected by two types of quantizing errors which are-\u00a0<\/strong><\/p>\n<ol>\n<li><span style=\"font-weight: 400;\"> Slope Overload Distortion<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> Granular Noise<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Slope overload distortion is when step size is too small, and granular noise is when step size is too large. In this modulation method, accommodation of a vast dynamic range is done by the more significant step size, and the accurate representation of low-signals is done by the smaller step size. So for minimizing errors, we should select the optimum step size.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Adaptive_Delta_Modulation_Transmitter_and_Receiver\"><\/span><span style=\"color: #e43023;\"><b>Adaptive Delta Modulation Transmitter and Receiver:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The adaptive Delta modulation technique is one of the subparts or types of Delta modulation that eliminates granular noise error efficiently. The main issue with digital modulation is the determination of the step size, which does influence the quality of the wave through which the production of the output is done.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In the steep slope of the modulation signal, a significant step size, as well as small step size, is required at the time when the message has a slope. The step size should be controlled as per the requirement so that the sample output can be e obtained. This is why adaptive Delta modulation is required in the whole process.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Adaptive_Delta_Modulation_Waveform\"><\/span><span style=\"color: #e43023;\"><b>Adaptive Delta Modulation Waveform:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Adaptive delta modulation waveform is an algorithm that produces an efficient decompression without requiring that the original message be encoded with any particular structure. It uses only one bitstream but is robust enough to handle errors in the transmission or storage of the bits.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This means that it can be used as a reliable backup mechanism for other modes of data compression. The adaptive delta modulation waveform is a special case of the general class of delta modulation waveforms. Adaptive delta modulation is used to encode binary symbols onto a continuous-time signal.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It allows variation of the amount of information per unit length of the tape. The system in the Adaptive delta modulation waveform uses a recording medium with an amorphous structure. With this, it can realize a great variety of coding strategies.<\/span><\/p>\n<p><a href=\"https:\/\/www.tescaglobal.com\/blog\/physics-lab-equipment\/\" target=\"_blank\" rel=\"noreferrer noopener\">Read also: Essential Physics Lab Equipment.<\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Advantages_of_Delta_Modulation\"><\/span><span style=\"color: #e43023;\"><b>Advantages of Delta Modulation:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">In comparison to digital modulation techniques Delta modulation has some advantages that are mentioned below:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When it comes to lover betrayed, Delta modulation is way better than the standard PCM as the operation of voice signal under Delta modulation system is done under optimum conditions, which increases the SNR by 9 DB and also doubles the bit rate.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Delta modulation is known for removing the redundancy of the encoded signal quite efficiently in comparison to a PCM sampling rate of PCM that is higher than the Nyquist rate.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In comparison to PCM, Delta modulation is cost-effective.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In Delta modulation, the task of transmission of signals is done at lower channel bandwidth which makes shows that it Delivers quick and robust data bits.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It doesn\u2019t exceed the maximum speech sinusoidal amplitude.<\/span><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Disadvantages_of_Delta_Modulation\"><\/span><span style=\"color: #e43023;\"><b>Disadvantages of Delta Modulation:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Some of the Limitations of Delta modulation are as follows:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Delta modular doesn\u2019t follow the signal if the signal step size is lesser. By doing so, it produces alternative positive and negative pulses.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In comparison to other modulators, it has a high bit rate.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The modular has an average startup response, and the usage of this modulator is limited practically.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If the signal is too high, then the modulator overloads.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In comparison to other types of modulators, Delta modulation is rather complex as it requires a predictor.<\/span><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Delta_Modulation_Circuit\"><\/span><span style=\"color: #e43023;\"><b>Delta Modulation Circuit:\u00a0<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A circuit that is used for the production of the output of delta modulation is known as the Delta modulation circuit. In this technique, the modulation information on a carrier wave is done.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The change to encode information on its carrier is minimum in this technique. In Delta modulation, the amplitude modulation determines the magnitude of the analog output with the help of a reference signal and information signal.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Let us assume that the voltage of a delta modulator is zero consistently. If there is any sudden change in the input signal, then the Delta modulator voltage will rise. With the increase of the frequency, the voltage level and the higher frequencies are changed. With the help of the rest R1 and R2 resistors, the voltage level is held back.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Difference_between_Delta_Modulation_and_Adaptive_Delta_Modulation\"><\/span><span style=\"color: #e43023;\"><b>Difference between Delta Modulation and Adaptive Delta Modulation:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Here are some significant differences between Delta modulation and adaptive Delta modulation:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Delta modulation has a fixed step size for the entire signal, where is in the adaptive Delta modulation, the step size can be changed as per the requirement and variation of the signal.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Quantization noise is present in adaptive Delta modulation, whereas, in the Delta modulation, the granular noise and overload distortion are present.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In Delta modulation, the utilization of the bandwidth is not as efficient as the adaptive Delta modulation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In comparison to Delta modulation, adaptive Delta modulation has a broader range.<\/span><\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Granular_Noise_in_Delta_Modulation\"><\/span><span style=\"color: #e43023;\"><b>Granular Noise in Delta Modulation:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">When the step size of the signal is large in comparison to the variation of the original input of the signal, it produces a granular noise. It is an error that can take place between the approximated signal and the original input half the signal. It is also known as idle noise.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In short, the slight variation of the input signal is changed into a large amount due to the large step size of the signal input. This can be solved by making the step size smaller.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Delta_Modulation_and_Demodulation_Theory\"><\/span><span style=\"color: #e43023;\"><b>Delta Modulation and Demodulation Theory:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">In modulation by adding electronic or optical carrier signals, data is converted into radio waves. Amplification and filtering at different stages are done by the demodulator so that the interference can be eliminated. There are very few factors that are responsible for influencing the extracted information and replicating the original for the input information.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For modulation and demodulation, a modem is the device that is used. In modulation, the information is encoded in a transmitted signal, and in demodulation, the information is decoded in a transmitted signal. The name modem is derived from the combination of the letters modular and demodulator.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">With the help of a multiplexer in the combination of streams of a different carrier can be done with the help of and coding the fixed duration segment one and then the other.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Delta_Modulation_and_Demodulation_Trainer_Kit\"><\/span><span style=\"color: #e43023;\">Delta Modulation and Demodulation Trainer Kit:<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/mCf_V5QFMjM\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article, we will discuss Delta modulation and how it is used as a modulation technique for digital signaling systems. Let\u2019s get started without any ado: It is a type of modulation where the amplitude of the carrier is varied in response to the instantaneous value of the input signal. In the case of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":315,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[33],"tags":[],"_links":{"self":[{"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/posts\/307"}],"collection":[{"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/comments?post=307"}],"version-history":[{"count":0,"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/posts\/307\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/media\/315"}],"wp:attachment":[{"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/media?parent=307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/categories?post=307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tescaglobal.com\/blog\/wp-json\/wp\/v2\/tags?post=307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}