Delta modulation is an analog-to-digital conversion technique used to transfer data. It works by comparing an input signal to a reference signal and encoding the difference as a 1 or 0. A delta modulation system consists of a modulator that encodes an analog signal into a digital bit stream and a demodulator that reconstructs the analog signal from the digital bit stream. Delta modulation achieves a high signal-to-noise ratio and can change signals instantly, though the reconstructed voice signal may not replicate rapid changes due to limitations such as slope overload.

1. Delta Modulation
PRESENTATION
ON

2. GROUP MEMBERGROUP MEMBER
 SAJIBUL HASSAN
 NAHIAN AHMED
 TARIQUL ISLAM
 MONSUR AHMED SHAFIQ
 OMAR FARUQ
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3. SAJIBUL HASSAN
ID-151-15-4986
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4. What isWhat is Delta Modulation?Delta Modulation?
• A delta modulation is an analog-to-digital
and digital-to-analog signal conversion
technique used Transfer Data.
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5. Why Delta Modulation?Why Delta Modulation?
• (DM or Δ-modulation) is an analog-to-digital
conversion.
• DM is the simplest form of differential pulse-code
modulation.(PCM)
• Delta Modulation used by Satellite Business
Systems or SBS.
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6. Why Delta Modulation?Why Delta Modulation?
• To achieve high signal-to-noise ratio, delta
modulation.
• DM can change instantly but
voice signals can’t not change instantly.
• DM signal is smaller than the PCM system.
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7. NAHIAN AHMED
ID- 151-15-5137
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8. Concept of DMConcept of DM
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9. DM Block DiagramDM Block Diagram
• If signal is large, the next bit in the digital data is 1,
otherwise, it is O.
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10. TARIQUL ISLAM
ID -151-15-5144
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11. DemodulationDemodulation
• Demodulation is digital-to-analog signal conversion.
• It’s the reverse System of modulation.
• Demodulation was first used in radio receivers.
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12. De M Block DiagramDe M Block Diagram
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13. OMAR FARUQ
ID-151-15-5444
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14. Simple Implementation ofSimple Implementation of
a DM systema DM system
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15. How it works Together?How it works Together?
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16. MONSUR AHMED SHAFIQ
ID- 151-15 - 5439
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17. PCM VS DMPCM VS DM
PCM
DM
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18. PCM VS DMPCM VS DM
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19. Limitations of the systemLimitations of the system
• Slope overload
• When the analog signal has a high rate of change,
the DM can “fall behind” and a distorted output
occurs
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