differential pulse code modulation

简明释义

差值脉冲编码灯

英英释义

例句

1.The video conferencing tool implemented differential pulse code modulation 差分脉冲编码调制 to enhance video quality over limited bandwidth.

视频会议工具实施了differential pulse code modulation 差分脉冲编码调制以提升在有限带宽下的视频质量。

2.The audio signal was compressed using differential pulse code modulation 差分脉冲编码调制 to improve transmission efficiency.

音频信号使用differential pulse code modulation 差分脉冲编码调制进行了压缩，以提高传输效率。

3.In telecommunications, differential pulse code modulation 差分脉冲编码调制 is often used to reduce bandwidth requirements.

在电信中，differential pulse code modulation 差分脉冲编码调制 通常用于减少带宽需求。

4.Many modern digital communication systems utilize differential pulse code modulation 差分脉冲编码调制 for better performance.

许多现代数字通信系统利用differential pulse code modulation 差分脉冲编码调制以获得更好的性能。

5.Using differential pulse code modulation 差分脉冲编码调制, the system was able to transmit data more reliably.

通过使用differential pulse code modulation 差分脉冲编码调制，系统能够更可靠地传输数据。

作文

In the realm of digital signal processing, various techniques are employed to efficiently encode and transmit audio and video signals. One such technique is differential pulse code modulation, which is often abbreviated as DPCM. This method is particularly effective in reducing the bandwidth required for transmission while maintaining a high level of fidelity in the reproduced signal. Understanding how differential pulse code modulation works can provide insights into its advantages over traditional pulse code modulation (PCM). To begin with, it is important to grasp the fundamental concept behind differential pulse code modulation. Unlike standard PCM, where each sample of the signal is encoded independently, DPCM encodes the difference between successive samples. This approach leverages the fact that in many audio and video signals, consecutive samples are often similar. By focusing on the changes between samples rather than the absolute values, DPCM can significantly reduce the amount of data that needs to be transmitted. The process of differential pulse code modulation involves several steps. First, the input signal is sampled at regular intervals. Then, the difference between the current sample and the previous sample is calculated. This difference is quantized and then encoded into a binary format for transmission. Upon receiving the encoded signal, the decoder reconstructs the original signal by adding the differences back to the previously reconstructed sample. This method not only saves bandwidth but also reduces the overall power consumption during transmission, making it an ideal choice for applications in mobile communications and low-bitrate audio codecs.One of the primary advantages of using differential pulse code modulation is its efficiency in terms of data compression. Since it encodes the differences rather than absolute values, the resulting data stream can be much smaller than that produced by traditional PCM. This is particularly beneficial in scenarios where bandwidth is limited or costly, such as satellite communications or streaming services. Furthermore, DPCM can achieve better signal-to-noise ratios when compared to PCM, making it a preferred choice in many professional audio applications.However, like any technology, differential pulse code modulation has its limitations. One significant drawback is that it can be more susceptible to errors during transmission. If a single bit error occurs in the encoded data, it can lead to a cascading effect that affects subsequent samples. This is particularly critical in real-time applications where maintaining signal integrity is essential. To mitigate this issue, error detection and correction techniques are often implemented alongside DPCM.In conclusion, differential pulse code modulation represents a vital advancement in the field of digital signal processing. Its ability to compress data while preserving quality makes it a valuable tool in various applications, from telecommunications to multimedia streaming. As technology continues to evolve, understanding and utilizing methods like DPCM will be crucial for optimizing data transmission in an increasingly digital world. The ongoing development of more robust error correction methods will further enhance the reliability of differential pulse code modulation, ensuring its relevance in future communication systems.

在数字信号处理领域，各种技术被用来有效编码和传输音频和视频信号。其中一种技术是differential pulse code modulation，通常缩写为DPCM。这种方法在减少传输所需带宽的同时，保持了再现信号的高保真度方面特别有效。理解differential pulse code modulation的工作原理可以提供对其相对于传统脉冲编码调制（PCM）的优势的深入了解。首先，重要的是要掌握differential pulse code modulation背后的基本概念。与标准PCM不同，后者对信号的每个样本进行独立编码，DPCM则编码连续样本之间的差异。这种方法利用了许多音频和视频信号中，连续样本往往相似的事实。通过关注样本之间的变化而不是绝对值，DPCM可以显著减少需要传输的数据量。differential pulse code modulation的过程涉及几个步骤。首先，输入信号在规则间隔内被采样。然后，计算当前样本与前一个样本之间的差异。这个差异被量化，然后以二进制格式编码以供传输。在接收编码信号时，解码器通过将差异加回到先前重建的样本中来重构原始信号。这种方法不仅节省了带宽，还减少了传输过程中的整体功耗，使其成为移动通信和低比特率音频编解码器等应用的理想选择。使用differential pulse code modulation的主要优势之一是其数据压缩的效率。由于它编码的是差异而不是绝对值，因此产生的数据流可能远小于传统PCM所产生的数据流。这在带宽有限或成本高昂的情况下尤其有利，例如卫星通信或流媒体服务。此外，与PCM相比，DPCM可以实现更好的信噪比，使其在许多专业音频应用中成为首选。然而，像任何技术一样，differential pulse code modulation也有其局限性。一个显著的缺点是它在传输过程中可能更容易受到错误的影响。如果编码数据中发生一个比特错误，可能会导致级联效应，影响后续样本。这在实时应用中尤为关键，因为保持信号完整性至关重要。为了减轻这一问题，通常会在DPCM旁边实施错误检测和纠正技术。总之，differential pulse code modulation代表了数字信号处理领域的一项重要进展。它在压缩数据的同时保持质量的能力使其成为各种应用中的宝贵工具，从电信到多媒体流。在技术不断发展的同时，理解和利用像DPCM这样的方法将对优化日益数字化世界中的数据传输至关重要。更强大的错误纠正方法的持续发展将进一步增强differential pulse code modulation的可靠性，确保其在未来通信系统中的相关性。