companding

简明释义

英[kəmˈpændɪŋ]美[kəmˈpændɪŋ]

v. 用压缩扩展器减低（信号）的信噪比（compand 的现在分词）

英英释义

单词用法

同义词

反义词

例句

1.Simulation results show that compared with clipping and the traditional companding techniques, threshold-based companding scheme can effectively improve the performance of PAPR with low complexity.

仿真结果表明，与削波技术和传统的压扩技术相比，门限压扩以较小的系统复杂度获得了峰均比性能的改善。

2.Simulation results show that compared with clipping and the traditional companding techniques, threshold-based companding scheme can effectively improve the performance of PAPR with low complexity.

仿真结果表明，与削波技术和传统的压扩技术相比，门限压扩以较小的系统复杂度获得了峰均比性能的改善。

3.This paper provides a new method to regulate the step length of FWCM by nonlinear companding in time domain, so that the error distribution can be controlled in circuit simulation.

本文提出一种通过时域非线性压缩-扩张改变FWCM采样步长，实现电路模拟误差分布控制的方法。

4.In this paper, a new adaptive delta modulation (ADM) method, hybrid companding delta modulation with algorithm (AHDM), is proposed for speech coding.

本文提出了一种新的自适应增量调制（ADM）话音编码方案——加性混合压扩增量调制（AHDM）。

5.Linear mapping (no companding).

线性映射(无压缩)。

6.In telecommunications, companding is used to optimize the dynamic range of audio signals.

在电信中，压扩用于优化音频信号的动态范围。

7.The process of companding helps reduce the effects of noise in a communication system.

这个压扩过程有助于减少通信系统中的噪声影响。

8.Digital audio systems often implement companding algorithms to improve sound quality.

数字音频系统通常实现压扩算法以提高音质。

9.When recording music, engineers may apply companding techniques to enhance the final mix.

在录制音乐时，工程师可能会应用压扩技术来增强最终混音。

10.The use of companding can significantly improve the performance of analog transmission systems.

使用压扩可以显著提高模拟传输系统的性能。

作文

In the world of telecommunications and audio processing, the term companding refers to a technique that combines compression and expansion to optimize the dynamic range of audio signals. This process is crucial for ensuring that sounds are transmitted clearly and efficiently, particularly in environments where background noise may interfere with the quality of the audio. The concept of companding has its roots in the need to balance the loudness of different sounds while minimizing distortion and maximizing clarity. To understand how companding works, it is essential to first grasp the principles of compression and expansion. Compression reduces the volume of loud sounds while amplifying quieter sounds, effectively narrowing the dynamic range of the audio signal. This is particularly useful in situations where the audio must be transmitted over long distances, as it helps to prevent distortion and ensures that the listener can hear even the softest sounds clearly. After the audio signal has been compressed, the next step in the companding process is expansion. Expansion reverses the effects of compression, restoring the original dynamic range of the audio signal. This step is vital because it allows the listener to experience the full richness and depth of the sound, making it more enjoyable and engaging. One of the primary applications of companding is in digital communication systems, such as telephony and broadcasting. For instance, when a person speaks into a microphone, the sound waves are converted into an electrical signal. This signal is then compressed before being transmitted over telephone lines or through wireless networks. Upon reaching the receiver, the signal undergoes expansion, allowing the listener to hear the speaker's voice as intended. This process not only improves the quality of the audio but also optimizes the use of bandwidth, enabling more efficient communication. Another area where companding is commonly used is in music production and live sound reinforcement. Audio engineers often employ compression during the recording process to ensure that all instruments and vocals are balanced and clear. By applying companding, they can create a polished final mix that translates well across various playback systems, from high-end speakers to standard earbuds. In addition to its technical applications, companding also has implications for the way we perceive sound. Research has shown that our ears are more sensitive to certain frequencies than others, which means that a well-balanced audio signal can significantly enhance our listening experience. By utilizing companding, audio professionals can craft soundscapes that are not only pleasing to the ear but also emotionally impactful. Overall, companding is a vital technique in the fields of audio engineering and telecommunications. Its ability to compress and expand audio signals allows for clearer communication and richer listening experiences. As technology continues to advance, the importance of companding will likely grow, ensuring that we can enjoy high-quality audio in an increasingly noisy world. Understanding and mastering this concept is essential for anyone interested in pursuing a career in audio production or telecommunications, as it forms the foundation for effective sound management and transmission.

在电信和音频处理的世界中，术语companding指的是一种将压缩和扩展结合起来以优化音频信号动态范围的技术。这个过程对于确保声音在传输时清晰高效至关重要，特别是在背景噪音可能干扰音频质量的环境中。companding的概念源于平衡不同声音的响度，同时最小化失真和最大化清晰度的需求。 要理解companding的工作原理，首先必须掌握压缩和扩展的基本原理。压缩减少响亮声音的音量，同时放大较安静的声音，有效地缩小了音频信号的动态范围。这在需要长距离传输音频的情况下尤其有用，因为它有助于防止失真，并确保听众能够清楚地听到即使是最轻微的声音。 在音频信号被压缩后，companding过程中的下一步是扩展。扩展逆转压缩的效果，恢复音频信号的原始动态范围。这一步至关重要，因为它允许听众体验声音的丰富性和深度，使其更加愉悦和引人入胜。 companding的主要应用之一是在数字通信系统中，例如电话和广播。例如，当一个人对着麦克风说话时，声波被转换为电信号。然后，该信号在通过电话线路或无线网络传输之前被压缩。在到达接收器后，信号经过扩展，使听众能够听到说话者的声音。这一过程不仅提高了音频的质量，还优化了带宽的使用，使得更高效的通信成为可能。 另一个companding常用的领域是音乐制作和现场声音增强。音频工程师通常在录音过程中使用压缩，以确保所有乐器和人声的平衡和清晰。通过应用companding，他们可以创建一个经过抛光的最终混音，这种混音在各种播放系统上都能良好地转换，从高端扬声器到标准耳塞。 除了其技术应用外，companding还对我们感知声音的方式产生影响。研究表明，我们的耳朵对某些频率比其他频率更敏感，这意味着良好平衡的音频信号可以显著增强我们的听觉体验。通过利用companding，音频专业人员可以打造既令人愉悦又具有情感冲击力的声音场景。 总的来说，companding是音频工程和电信领域的重要技术。它压缩和扩展音频信号的能力使得更清晰的通信和更丰富的听觉体验成为可能。随着技术的不断进步，companding的重要性可能会进一步增长，确保我们能够在一个日益嘈杂的世界中享受高质量的音频。理解和掌握这一概念对于任何希望从事音频制作或电信职业的人来说都是至关重要的，因为它构成了有效声音管理和传输的基础。