sampling rate

简明释义

采样率

英英释义

例句

1.The sampling rate of this video is set to 30 frames per second.

这个视频的采样率设置为每秒30帧。

2.The audio engineer adjusted the sampling rate to improve sound quality.

音频工程师调整了采样率以提高音质。

3.A higher sampling rate can capture more details in a recording.

更高的采样率可以捕捉到录音中的更多细节。

4.In digital signal processing, the sampling rate is crucial for accurate representation.

在数字信号处理过程中，采样率对于准确表示至关重要。

5.To analyze the data effectively, we need to choose an appropriate sampling rate.

为了有效分析数据，我们需要选择合适的采样率。

作文

In the world of digital audio and video, the term sampling rate refers to the number of samples of audio carried per second, measured in Hertz (Hz). It plays a crucial role in determining the quality of sound recordings and playback. When we talk about sampling rate, we are essentially discussing how often an audio signal is sampled in order to convert it from an analog format to a digital one. This process is fundamental to digital signal processing and has a significant impact on the fidelity of the audio we hear.To understand the importance of sampling rate, let’s consider the Nyquist theorem, which states that to accurately reproduce a sound wave, the sampling rate must be at least twice the highest frequency present in the signal. For instance, if a sound contains frequencies up to 20 kHz, the minimum sampling rate required would be 40 kHz. This is why standard audio CDs use a sampling rate of 44.1 kHz, which allows for high-fidelity reproduction of sound.Higher sampling rates can capture more detail in the sound, but they also result in larger file sizes. For example, professional audio equipment might use a sampling rate of 96 kHz or even 192 kHz for studio recordings, providing greater clarity and depth. However, for most casual listeners, a sampling rate of 44.1 kHz is sufficient for everyday listening experiences. This balance between quality and file size is crucial in the age of streaming music and video content.Moreover, the sampling rate can influence the overall dynamics of a recording. A lower sampling rate may lead to aliasing, where higher frequencies are misrepresented as lower ones, causing distortion in the audio. This is particularly problematic in genres of music that rely heavily on high-frequency sounds, such as electronic or classical music. Therefore, selecting an appropriate sampling rate is essential for preserving the integrity of the original sound.In video production, the concept of sampling rate also applies in terms of frame rates. Although not directly the same, both concepts deal with how frequently information is captured over time. A higher frame rate in video corresponds to smoother motion and better quality, similar to how a higher sampling rate in audio results in clearer sound. This is why filmmakers often choose to shoot at 24 frames per second (fps) for a cinematic look, while action scenes might benefit from a higher frame rate like 60 fps.In conclusion, understanding sampling rate is vital for anyone involved in audio and video production. It affects not only the quality of the final product but also the experience of the audience. Whether you are a musician, sound engineer, or videographer, recognizing the implications of sampling rate will help you make informed decisions that enhance your work. As technology continues to evolve, so too will our understanding and application of sampling rate, ensuring that we continue to deliver high-quality audio and visual experiences to audiences around the world.

在数字音频和视频的世界中，术语采样率指的是每秒传输的音频样本数量，以赫兹（Hz）为单位进行测量。它在决定声音录制和播放质量方面起着至关重要的作用。当我们谈论采样率时，我们实际上是在讨论音频信号被采样的频率，以便将其从模拟格式转换为数字格式。这个过程是数字信号处理的基础，对我们听到的音频的保真度有着显著的影响。要理解采样率的重要性，让我们考虑奈奎斯特定理，该定理指出，为了准确重现声波，采样率必须至少是信号中最高频率的两倍。例如，如果声音包含高达20 kHz的频率，则所需的最低采样率为40 kHz。这就是为什么标准音频CD使用44.1 kHz的采样率，这使得高保真声音的重现成为可能。更高的采样率可以捕捉到声音中的更多细节，但也会导致文件大小增加。例如，专业音频设备可能使用96 kHz或甚至192 kHz的采样率进行录音，提供更大的清晰度和深度。然而，对于大多数普通听众来说，44.1 kHz的采样率对于日常听音体验是足够的。这种质量与文件大小之间的平衡在音乐和视频内容流媒体时代至关重要。此外，采样率还可以影响录音的整体动态。较低的采样率可能导致混叠，即高频率被错误表示为低频率，从而导致音频失真。这在依赖高频声音的音乐流派中，尤其是电子音乐或古典音乐中，问题尤为突出。因此，选择合适的采样率对于保持原始声音的完整性至关重要。在视频制作中，采样率的概念也适用于帧率。虽然并不完全相同，但这两个概念都涉及到信息在时间上被捕获的频率。视频中的更高帧率对应于更流畅的运动和更好的质量，类似于音频中的更高采样率导致更清晰的声音。这就是为什么电影制片人通常选择以每秒24帧（fps）拍摄，以获得电影效果，而动作场景可能受益于更高的帧率，如每秒60帧。总之，理解采样率对于任何参与音频和视频制作的人来说都是至关重要的。它不仅影响最终产品的质量，还影响观众的体验。无论您是音乐家、声音工程师还是摄像师，认识到采样率的含义将帮助您做出明智的决策，从而提升您的作品。随着技术的不断发展，我们对采样率的理解和应用也将不断演进，确保我们继续向全球观众提供高质量的音频和视觉体验。