CVSD (Continuously Variable Slope Delta Modulation) digital pressure amplification modulation principle analysis experiment method and system

Abstract

The invention discloses a CVSD (Continuously Variable Slope Delta Modulation) digital pressure amplification modulation principle analysis experiment method and system. The method comprises the steps of performing band limit, sampling, subtraction comparison, difference coding, pulse amplitude modulation, joint code detection, smoothing and integral processing on input audio analog signals to obtain audio analog signals, quantization step signals and binary coded signals, and establishing a synchronous horizontal axis on a liquid crystal display via an STM32 microprocessor, wherein the horizontal axis is a time axis having a syllable cycle based on the working frequency of the processor; sampling the input audio analog signals with 32KHZ A/D sampling frequency, displaying an envelope of the sampled signals on the liquid crystal display, and forming, by the envelope, input audio analog signal wave corresponding to the time axis. By adopting the method and the system, changes of code output data, quantization step level and joint code bits caused by frequency and amplitude changes of the input analog signals and a comparison relation between the quantization step signals and the input analog signals on amplitude can be simultaneously observed on one liquid crystal display screen.

Description

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AI Technical Summary

Benefits of technology

This technology allows for visual observation of how changing levels or numbers of characters occur during CCD (charge coupled device) displays. By comparing this changed image data over multiple periods together, researchers can learn about various aspects related to CCD encoding/decoding processes such as timing differences, voltage variations, etc., making them easier at learning more advanced concepts like digital video compression techniques.

Problems solved by technology

This patented technical solution describes how to create a system for displaying numeric value (CV) overlapping or discontinuity during compression adjustment experiments. However, current solutions require manual intervention from experts who have limited ability to interpret these results due to their subjective nature.

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