声音编码

MPEG声音编码的单片DSP实现

Single Chip DSP Implementation of MPEG Audio Encoding

MPEG的声音编码

Audio Coding of MPEG

本文对MPEG的声音编码进行了讲解，首先对MPEG-1的基本算法进行介绍，然后就MPEG-2算法的不同进行了解说。

This paper describes audio coding of MPEG , first introduces basic algorithm of MPEG-1 , then analyzes diffient algorithm of MPEG-2 .

杜比数字（DolbyDigital）已被定为数字电视DTV的声音编码标准，其也是目前最流行的5.1声道环绕声格式。

Dolby Digital was adopted as the sound coding standard for DTV applications , and it has become the most popular 5.1-channel surround sound format in recent years .

介绍MPEG声音编码、DolbyAC－2和AC－3的算法、实时实现的复杂度以及多声道主观测试结果。

The algorithm and realtime hardware implement complexity of MPEG / Audio , Dolby AC-2 , and AC-3 are introduced . The result of the MPEG / Audio multichannel subject listening tests are introduced also .

基于小波包变换的混合域声音编码

Audio coding in mixed domain based on wavelet packet transforms

这项发现有着广泛的内涵，因为它不仅应用了在音乐里的声音编码技术而且应用了在语言里的声音编码技术。

This finding has broad implications because it applies to sound encoding skills involved not only in music but also in language .

研究了小波包变换在声音编码中的应用，通过利用小波包变换在时域和频域都具有良好局部性的特点，提出了一种新的中低码率混合域声音编码算法。

The use of wavelet packet transforms in audio coding is studied , and a new medium and low bit rate mixed domain audio coding algorithm has been given based on the good localization of wavelet packet transforms in both time domain and frequency domain .

对H.261图象压缩编码与G.722声音压缩编码部分作了较详细的介绍。

The video codec of H. 261 and audio codec of G. 722 are described in detail .

数字声音压缩编码的进展

The Development of Digital Audio Coding

OggVorbis是一种完全免费，并有较好主观声音质量的编码算法。

Ogg Vorbis is an open-source audio encoding technology with a high subjective sound quality .

背景声音干扰处于编码阶段和复述阶段。

The disruption by background sound is imposed at both encoding and rehearsal periods .

GB/T14919-1994数字声音信号源编码技术规范

The specifications for digital audio source coding

作为听觉系统最高级中枢，听皮层对声音信息的编码动态可变。

Being the highest hierarchy of the central auditory system , auditory cortex plays an important role in the acoustic information encoding . The acoustic information processing could be dynamically modulated by the changing acoustic context .

大鼠初级听皮层神经元对声音空间信息的编码

Encoding of Sound Spatial Information by Neurons in The Rat Primary Auditory Cortex

在我们将非语言声音信号用于信息编码的时候，这一性质非常有用。

This property is very useful if we want to use nonspeech audio signals as encoded messages .

音视频的数字化处理与传输是数字电视技术和多媒体通信技术的核心，国际标准化组织和国际电工委员会制定了相应的一系列声音、图像压缩编码的国际标准。

ISO and IEC have established a series of international standards for sound and image compressing and coding .

1944年底，采样声音信号并进行编码的机器制造完成了，

By the end of 1944 , the equipment which did the sampling of the speech signal , and which processed the enciphered samples , was finished .

该结果提示，复杂声环境下听皮层神经元对声音频率信息的编码既与神经元本身的频率调谐特性有关，也与声刺激背景的声学特性有关。

The results suggest that the encoding of sound frequency information by auditory cortex neurons in a complex acoustic environment is influenced by both the frequency tuning of the neurons and the sound stimulus context .

本论文的目的在于研究大鼠初级听皮层（AI区）神经元在动态变化的声音环境下对声音频率信息的编码模式。

The main purpose of our study is to investigate how the primary auditory cortex ( Al ) encodes sound frequencies under the dynamically changing acoustic context .

数字声音广播（DAB）中的宽带声音压缩编码技术

Broadband networks Wideband Audio Coding Techniques for DAB

作为ATSC-HDTV系统的声音制式标准，杜比AC-3是一种高质量、低复杂度的多声道声音编码压缩技术，被越来越多的应用到各种场合。

As audio compression standard of ATSC-HDTV , Dolby AC-3 is a high-quality , low-complexity multichannel audio coder which is used for more and more applications .

系统的信息来源是交通广播电台的声音信息，操作员从中获取最新的交通路况信息，利用交通信息编辑程序将听到的声音信息转化为编码信息。

Information source of the systems is the voice information of traffic radio . Operator obtains the latest road traffic information from the voice information , using traffic information editing process , translating the voice information into code information .