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1. Trinity Institute of Technology and Research Bhopal PPT Presentation on Adaptive Delta Modulation SUBMMITED BY PRABHAT KUMAR DHURVE BRANCH-EC ENROLLMENT NO.-0198EC211019 SUBMMITED TO PROF. AKASH GUPTA SIR DIGITAL COMMUNICATION

2. CONTECT Adaptive Delta Modulation Principal And Basic Concept Of Delta Modulation Adaptive delta modulation Advantage And Limitation Of ADM Application Comparison Conclusion

3. Adaptive Delta Modulation Discover the principles, algorithms, and applications of adaptive delta modulation, the cutting-edge process that could change digital communication forever. Block Diagram Adaptive Delta Modulation

4. Principles and Basic Concept of Delta Modulation Quantization The analog signal is represented by a staircase function by reducing the number of bits used to digitize. Predictor This algorithm uses the previous value of the ADC output to estimate a new sample. Encoder The estimated signal value from the predictor is compared to the actual sampled signal to determine if the next output signal will be + or -.

5. Adaptive Delta Modulation Algorithm 1 Old Signal vs New Signal During encoding, the current signal is compared to the last signal, and the difference is quantized and output as the bitstream. 2 Adaptation Level The algorithm learns from the difference between the predicted signal and the actual signal by adapting the step size to optimize the process. 3 Limitations of Step Size The step size must be chosen carefully, as too large a value could overload the system, while too small a value could result in a loss of resolution.

6. Advantages and Limitations of Adaptive Delta Modulation Advantages Simple, efficient, and effective scheme for one-dimensional signal digitization with fewer bits required. It is also relatively easy to implement in hardware. Limitations Not as accurate as pulse code modulation. Adaptive delta modulation requires a bit rate 2-3 times higher than PCM to achieve equivalent accuracy but requires significantly less computational power, memory, and processing compared to PCM.

7. Applications of Adaptive Delta Modulation Wireless Networks Adaptive delta modulation is used to recover voice and audio data in wireless networks and mobile phones with low bit rate or weak signals. Medical Applications Adaptive delta modulation is used for electrocardiogram data compression in order to store and transmit high resolution ECG signals. Speech Recognition Adaptive delta modulation is employed in speech recognition, where low-bandwidth signals need to be digitized efficiently for processing.

8. Comparison with Other Modulation Techniques 1 Pulse Width Modulation Delta modulation is more efficient than pulse width modulation since the latter requires parallel processing because each part of the input audio signal requires a separate quantization . 2 Pulse Code Modulation Delta modulation allows for faster processing with less computational power, memory and processing, less wise dynamic range and fewer bits to encode the signal than Pulse Code Modulation (PCM). 3 Frequency Modulation Adaptive delta modulation is more efficient and more intuitive than frequency modulation because it gets the signal changes from the difference of the actual and the predicted values rather than the changes in frequency.

9. Conclusion and Summary 1 Efficient and Accurate Adaptive delta modulation is a simple and efficient technique for digitizing and transmitting low-resolution analog signals with high accuracy. 2 Effective in Various Fields Adaptive delta modulation is widely used in many fields, including telecommunications, speech recognition, and medical data storage and transfer. 3 Comparison with Other Techniques Adaptive delta modulation has its own advantages and limitations compared to other modulation techniques such as PCM, PWM, and FM.

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