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 into a digital bitstream. A delta modulation system consists of a modulator that converts an analog signal to digital, and a demodulator that converts the digital signal back to analog. Delta modulation is simpler than pulse code modulation but can achieve high signal-to-noise ratios and variable bandwidth. However, it is limited by slope overload when signals change rapidly.

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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