delta modulation

简明释义

增量调制

英英释义

例句

1.The delta modulation technique simplifies the encoding process of analog signals.

增量调制技术简化了模拟信号的编码过程。

2.Engineers often prefer delta modulation for its ability to handle noisy environments effectively.

工程师们通常更喜欢增量调制，因为它能够有效处理嘈杂环境。

3.In a recent project, we implemented delta modulation to enhance the quality of the transmitted voice data.

在最近的项目中，我们实施了增量调制以提高传输语音数据的质量。

4.In digital communication, delta modulation is used to reduce the bandwidth required for transmitting audio signals.

在数字通信中，增量调制用于减少传输音频信号所需的带宽。

5.The main advantage of delta modulation is its simplicity in hardware requirements.

增量调制的主要优点是其对硬件要求的简单性。

作文

In the field of signal processing, various techniques are employed to efficiently transmit and store audio and video data. One such technique is delta modulation, which has gained popularity due to its simplicity and effectiveness. This method is particularly useful in applications where bandwidth is limited, as it allows for a significant reduction in the amount of data that needs to be transmitted. Delta modulation (增量调制) is a form of differential pulse code modulation, which means it encodes the difference between successive samples rather than the absolute values of the samples themselves. The basic principle behind delta modulation is to track the changes in the amplitude of an analog signal over time. Instead of sending the full value of each sample, delta modulation sends a single bit that indicates whether the signal has increased or decreased since the last sample. If the signal has risen, a '1' is sent; if it has fallen, a '0' is transmitted. This binary representation significantly reduces the amount of data required to represent the original signal.One of the main advantages of delta modulation is its ability to simplify the encoding and decoding process. The receiver can easily reconstruct the original signal by integrating the series of bits received. This makes delta modulation particularly appealing for real-time applications, such as voice transmission over the internet or mobile networks, where low latency is crucial. Additionally, the reduced data rate helps to minimize bandwidth consumption, which is a critical factor in many communication systems.However, delta modulation is not without its drawbacks. One notable issue is the phenomenon known as 'slope overload distortion.' This occurs when the signal changes too rapidly for the delta modulation system to accurately track the changes. In such cases, the system may fail to keep up, resulting in a loss of fidelity in the reconstructed signal. To mitigate this issue, a more advanced version called 'adaptive delta modulation' can be employed. This variant adjusts the step size dynamically based on the characteristics of the input signal, allowing for better tracking of rapid changes.Another challenge with delta modulation is the potential for 'granular noise,' which arises when the signal being encoded has small fluctuations. Since delta modulation only considers whether the signal has increased or decreased, it can lead to a staircase effect in the reconstructed signal, where small variations are lost. This can be particularly problematic in applications requiring high fidelity, such as music transmission.Despite these limitations, delta modulation remains a valuable tool in the realm of digital communication. Its simplicity and efficiency make it suitable for various applications, including telemetry, speech encoding, and even some video compression techniques. As technology continues to evolve, researchers are exploring ways to enhance delta modulation and address its shortcomings, ensuring that it remains relevant in an increasingly digital world.In conclusion, delta modulation is a noteworthy technique in signal processing that offers several benefits, particularly in terms of bandwidth efficiency and ease of implementation. While it does present certain challenges, advancements in the field continue to improve its performance, making it an essential component of modern communication systems.

在信号处理领域，采用各种技术来有效地传输和存储音频和视频数据。其中一种技术是增量调制，由于其简单性和有效性而受到欢迎。这种方法在带宽有限的应用中尤其有用，因为它可以显著减少需要传输的数据量。增量调制（delta modulation）是一种差分脉冲编码调制，这意味着它编码连续样本之间的差异，而不是样本本身的绝对值。增量调制的基本原理是跟踪模拟信号随时间变化的幅度。它不发送每个样本的完整值，而是发送一个比特，指示自上一个样本以来信号是否增加或减少。如果信号上升，则发送“1”；如果下降，则发送“0”。这种二进制表示法显著减少了表示原始信号所需的数据量。增量调制的主要优点之一是能够简化编码和解码过程。接收器可以通过集成接收到的一系列比特轻松重建原始信号。这使得增量调制在实时应用中尤其具有吸引力，例如互联网或移动网络上的语音传输，其中低延迟至关重要。此外，降低的数据速率有助于最小化带宽消耗，这在许多通信系统中是一个关键因素。然而，增量调制并非没有缺点。其中一个显著的问题是“斜率过载失真”现象。当信号变化过快，以至于增量调制系统无法准确跟踪变化时，就会发生这种情况。在这种情况下，系统可能无法跟上，从而导致重建信号的保真度下降。为了解决这个问题，可以使用一种更先进的变体，称为“自适应增量调制”。这种变体根据输入信号的特征动态调整步长，从而更好地跟踪快速变化。增量调制的另一个挑战是潜在的“颗粒噪声”，当被编码的信号具有小波动时就会出现这种噪声。由于增量调制只考虑信号是增加还是减少，因此在重建信号中可能会导致阶梯效应，从而丢失小的变化。这在需要高保真的应用中，诸如音乐传输时，可能特别成问题。尽管存在这些局限性，增量调制仍然是数字通信领域中的一种宝贵工具。其简单性和效率使其适用于各种应用，包括遥测、语音编码甚至某些视频压缩技术。随着技术的不断发展，研究人员正在探索改善增量调制的方法，以解决其缺点，确保其在日益数字化的世界中保持相关性。总之，增量调制是信号处理中的一种值得注意的技术，提供了几个好处，特别是在带宽效率和实现简便性方面。尽管确实存在某些挑战，但该领域的进展继续改善其性能，使其成为现代通信系统的重要组成部分。