delta modulation

简明释义

增量调制

英英释义

例句

1.In digital communication systems, delta modulation 增量调制 is often used for its simplicity and efficiency.

在数字通信系统中，delta modulation 增量调制 常因其简单性和高效性而被使用。

2.The audio signal was converted using delta modulation 增量调制 to reduce bandwidth requirements.

音频信号通过使用delta modulation 增量调制 被转换，以减少带宽需求。

3.The implementation of delta modulation 增量调制 in telecommunication helps improve signal quality.

在电信中实施delta modulation 增量调制 有助于提高信号质量。

4.One advantage of delta modulation 增量调制 is its ability to handle low-bit-rate signals effectively.

delta modulation 增量调制 的一个优点是能够有效处理低比特率信号。

5.In robotics, delta modulation 增量调制 can be utilized for controlling motor movements smoothly.

在机器人技术中，delta modulation 增量调制 可用于平滑控制电机运动。

作文

Delta modulation is a signal encoding technique that simplifies the process of analog-to-digital conversion. It is particularly useful in applications where bandwidth is limited, such as in telecommunications and audio transmission. The concept behind delta modulation (增量调制) is to transmit the difference between successive samples rather than the absolute values of the samples themselves. This method reduces the amount of data that needs to be sent, making it an efficient choice for various digital communication systems.In a typical delta modulation system, the analog signal is sampled at regular intervals. The output of each sample is compared to the previous sample, and the encoder determines whether the current sample is higher or lower than the previous one. If the current sample is higher, a binary '1' is transmitted; if it is lower, a binary '0' is sent. This simple process creates a stream of bits that represent the changes in the signal over time, rather than the signal itself.One of the main advantages of delta modulation (增量调制) is its simplicity. The encoding and decoding processes are straightforward, which makes the technology easy to implement. Additionally, because only the differences between samples are transmitted, the amount of data required is significantly reduced. This reduction in data can lead to lower transmission costs and improved efficiency, especially in systems where bandwidth is at a premium.However, delta modulation is not without its drawbacks. One significant limitation is the potential for distortion in the reconstructed signal. Since the technique relies on approximating the original signal by transmitting only the differences, rapid changes in the signal can lead to errors in reconstruction. This phenomenon is known as slope overload distortion. To mitigate this issue, some systems employ techniques like adaptive delta modulation (自适应增量调制), which adjusts the step size based on the rate of change of the input signal. By adapting the step size, the system can more accurately track faster changes in the signal, reducing distortion and improving overall performance.Another challenge with delta modulation is the quantization noise that can occur due to the limited resolution of the transmitted signal. As the resolution is constrained by the binary nature of the encoding, there may be instances where the actual signal value falls between two quantized levels, leading to inaccuracies. This effect can be particularly pronounced in low-frequency signals, where the differences between samples may be small.Despite these challenges, delta modulation remains a valuable tool in the field of digital communications. Its simplicity and efficiency make it suitable for various applications, including voice transmission over telephone lines, wireless communications, and even some forms of video transmission. As technology continues to evolve, researchers are exploring new ways to enhance the capabilities of delta modulation, aiming to improve its performance and expand its applicability in modern communication systems.In conclusion, delta modulation (增量调制) is a fundamental technique in signal processing that offers a balance between simplicity and efficiency. While it has its limitations, ongoing advancements in the field promise to address these challenges, ensuring that delta modulation remains a relevant and effective method for transmitting information in our increasingly digital world.

增量调制是一种信号编码技术，简化了模拟到数字转换的过程。它在带宽有限的应用中尤其有用，如电信和音频传输。delta modulation（增量调制）背后的概念是传输连续样本之间的差值，而不是样本的绝对值。这种方法减少了需要发送的数据量，使其成为各种数字通信系统的高效选择。在典型的delta modulation系统中，模拟信号在规则的时间间隔内被采样。每个样本的输出与前一个样本进行比较，编码器确定当前样本是高于还是低于前一个样本。如果当前样本更高，则发送二进制'1'；如果更低，则发送二进制'0'。这个简单的过程创建了一串比特，表示信号随时间的变化，而不是信号本身。delta modulation（增量调制）的主要优点之一是其简单性。编码和解码过程相对直接，这使得该技术易于实现。此外，由于仅传输样本之间的差异，因此所需的数据量显著减少。这种数据量的减少可以降低传输成本，提高效率，尤其是在带宽紧张的系统中。然而，delta modulation并非没有缺点。一个显著的限制是重建信号时可能出现的失真。由于该技术依赖于通过仅传输差异来近似原始信号，因此信号的快速变化可能导致重建错误。这种现象被称为斜率过载失真。为了减轻这一问题，一些系统采用自适应delta modulation（自适应增量调制）等技术，根据输入信号的变化速率调整步长。通过调整步长，系统可以更准确地跟踪信号中的快速变化，从而减少失真，提高整体性能。delta modulation的另一个挑战是由于传输信号的有限分辨率可能发生的量化噪声。由于编码的二进制特性，分辨率受到限制，实际信号值可能落在两个量化水平之间，从而导致不准确。在低频信号中，这种效应可能特别明显，因为样本之间的差异可能很小。尽管存在这些挑战，delta modulation仍然是数字通信领域的一个宝贵工具。其简单性和效率使其适用于各种应用，包括电话线路上的语音传输、无线通信，甚至某些形式的视频传输。随着技术的不断发展，研究人员正在探索增强delta modulation能力的新方法，旨在改善其性能并扩大其在现代通信系统中的适用性。总之，delta modulation（增量调制）是信号处理中的一种基本技术，在简单性和效率之间提供了平衡。尽管存在局限性，但该领域的持续进步承诺解决这些挑战，确保delta modulation在我们日益数字化的世界中仍然是一种相关且有效的信息传输方法。