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pulse code modulation

Definition

method of converting analog signals into digital data ... See more

Translation of "pulse code modulation" in Chinese

Definition NEW

脉冲编码调制

pulse code modulation communication system hierarchy

脉冲编码调制通信系统系列

Specifically, GSM uses a regular pulse excited-long term prediction (RPE-LTP) coder for voice data between the mobile device and the BSS, but pulse code modulation (A-law or μ-law standardized in ITU G.) upstream of the BSS.

具体来说，GSM为移动设备和BSS之间的语音数据，使用一个固定间隔脉冲激励 - 长期预测（Regular Pulse Excited-Long Term Prediction，简称RPE-LTP）编码器，但是在BSS的上游，使用脉冲编码调制（在ITU G.中被标准化的A律和 μ律）。

This article will show how to play PCM (Pulse Code Modulation) audio.

本文将演示如何播放PCM （脉冲编码调制）音频。

LinkMatik 2.0 is a serial/PCM audio to Bluetooth data link. It can be controlled from a host controller using simple commands. It can also operate without a host controller for point-to-point serial connections. Auto-Slave and Auto-Master modes allow LinkMatik 2.0 to operate a slave, master or wedded pair. It is shipped in Auto-Slave mode. The module can be interfaced to many standard Bluetooth devices, e.g. Laptop computers, PDA's, Mobile phones etc. PCM (Pulse Code Modulation) audio connections provide an audio interface when used with a suitable audio codec.

LinkMatik 2.0 是到蓝牙数据链路的串行/PCM 音频设备。可以从主控制器使用简单的命令对其进行控制。在没有主控制器的情况下，也可以进行点到点的串行连接。使用自动从模式和自动主模式，LinkMatik 2.0 可以操作从、主或结合对。以自动从模式的方式装运。该模块可以与多种标准蓝牙设备互联，例如便携式计算机、PDA、移动式电话等等。PCM（脉冲编码调制）音频连接提供了一个音频接口，与适当的音频编解码器一起使用。

pulse code modulation cables cannot pass within 200 feet of a high frequency station antenna or high frequency station coaxial cable

脉码调制电缆不能连接200英尺以内的高频站点天线或高频站点同轴电缆，否则会产生不可接受的干扰

The bandwidth allocated for a single voice-frequency transmission channel is usually 4 kHz, including guard bands, allowing a sampling rate of 8 kHz to be used as the basis of the pulse code modulation system used for the digital PSTN.

为单个语音频率传输信道分配的带宽通常为4kHz，这包括保护频带（英语：Guard band），以允许8kHz的采样率作为数字公共交换电话网（PSTN）所用的脈衝編碼調變系统的基础。

The effects of the channel bit error on the reconstructed images of the Differential Pulse Code Modulation (DPCM) systems are analysed in this paper.

本文分析了信道误码对DPCM图象传输系统重建图象的影响。

When a file is compressed into WAV, the data are not supposed to be lost, and the quality is excellent. However, the format did not have a huge market share, due to its larger size, as compared with MP3. It is required to have enough time and disc space to upload and send such files via the Internet. One of the major advantages of WAV is linked to the use of Linear Pulse Code Modulation (LPCM) for storage of audio stream. Consequently, a copy is just as good as an original, which is highly appraised by experts in music and professional users.

描述＿介绍 WAV格式设计用于数字化音频流，是一种音频文件格式，包含音乐作品，录音和各种音频效果。由Microsoft和IBM程序员开发，它是为运行Windows操作系统的计算机配置未压缩音频的关键格式。这些文件由QuickTime，Windows Media Player，Wav Player和许多其他程序播放。此外，它们还可用于编辑音频的应用程序。 WAV中的文件压缩技术不会在压缩期间提供数据丢失，并且它们具有高质量的特征。但是，由于其尺寸较大，相比MP3格式并未得到广泛应用。要通过互联网（Internet）下载和发送此类文件，需要大量磁盘空间和大量时间。 WAV的主要优点之一是使用线性脉冲调制（LPCM）技术来存储音频流。因此，该副本完全与原版一致，受到音乐专家和专业用户的高度赞赏。

ADPCM: Acronym for Adaptive Delta Pulse Code Modulation, a method of storing audio information in a digital format.

ADPCM ： Adaptive Delta Pulse Code Modulation（自适应增量脉冲编码）的首字母缩写，它是用数字格式存储音频信息的一种方式。

Digital communication systems: pulse code modulation (PCM), differential pulse code modulation (DPCM), delta modulation (DM); digital modulation schemes-amplitude, phase and frequency shift keying schemes (ASK, PSK, FSK), matched filter receivers, bandwidth consideration and probability of error calculations for these schemes.

模拟通信系统：幅度和角度调制和解调系统，对频谱噪声的分析数字通信系统：脉冲编码调制 （PCM ）、数字调制方式、幅度和频率相移键控、匹配滤波接收器，带宽和检错纠错机制、GSM 、时分多（TDMA）

characteristics of pulse code modulation for voice-frequencies

音频脉冲编码调制特性

Differential Pulse Code Modulation is adopted for the low-frequency sub-images with most energy, which are called the 1st level.

包含能量最多的低频子图像称为第1级，来用无损差分脉冲编码调制方式；

The Adaptive Differential Pulse Code Modulation(ADPCM) algorithm has been used to replace the Adaptive Pulse Code Modulation(APCM) algorithm in the RPE-LTP scheme to quantize the selected RPE sequence.

又用自适应差分脉冲编码调制（ADPCM），代替RPE-LTP方案中的自适应脉冲编码调制（APCM）对选择的RPE序列进行的量化编码。