共查询到19条相似文献,搜索用时 130 毫秒
1.
2.
多媒体通信的关键技术之一为视频和音频了压缩编码技术,本文综述的近年来发展的一些音频压缩编码算法,并介绍了几种优选为国际标准的音频压缩标准。 相似文献
3.
4.
随着相关技术的快速发展,语音通信的应用范围也逐渐扩大.语音通信中最关键的技术是音频数字压缩技术.而随着移动互联网的发展,移动业务和互联网业务的结合已经成为发展最快的业务.将自适应的音频数字压缩技术应用于移动通信终端上,是音频数据传输领域关注和研究的热点.简要介绍了音频数字压缩技术的理论基础、若干标准以及发展现状,并对音频数字压缩技术的可专利性进行了分析. 相似文献
5.
6.
简单描述了波形音频件的格式,提出了一种压缩波形音频件的方法,给出了压缩依据和压缩结果,实验结果表明压缩技术方法是可行的。 相似文献
7.
8.
数字音频压缩最大的优点就是。如果合理压缩编码.经过压缩处理后的音频与原始音频在音质上相差很小.由于这个原因。音频压缩对于那些只关心音乐内容的听众来说是一种几乎透明的技术。音频压缩的优点在于可以减少存贮空间或是在传输时减少所占用的带宽。 相似文献
9.
10.
11.
AlgorithmofAdaptiveBitAlocationWaveletTransformAudioCodingMaHongfeiFanChangxinSongGuoxiang(XidianUniversity,Xi’an71... 相似文献
12.
13.
14.
The goal is to introduce and solve the audio coding optimization problem. Psychoacoustic results such as masking and excitation pattern models are combined with results from rate distortion theory to formulate the audio coding optimization problem. The solution of the audio optimization problem is a masked error spectrum, prescribing how quantization noise must be distributed over the audio spectrum to obtain a minimal bit rate and an inaudible coding errors. This result cannot only be used to estimate performance bounds, but can also be directly applied in audio coding systems. Subband coding applications to magnetic recording and transmission are discussed in some detail. Performance bounds for this type of subband coding system are derived 相似文献
15.
在语音信号处理的许多应用中,采用了无损音频压缩的方法.回顾了MPEG-4音频技术的现状,MPEG-4 ALS(Audio Lossless Coding)标准化过程以及编解码技术.详细介绍了编码器中的线性预测、量化、熵编码等模块,展望了MPEG-4 ALS的应用前景. 相似文献
16.
17.
18.
19.
《Signal Processing: Image Communication》2000,15(4-5):423-444
MPEG-4 audio represents a new kind of audio coding standard. Unlike its predecessors, MPEG-1 and MPEG-2 high-quality audio coding, and unlike the speech coding standards which have been completed by the ITU-T, it describes not a single or small set of highly efficient compression schemes but a complete toolbox to do everything from low bit-rate speech coding to high-quality audio coding or music synthesis. The natural coding part within MPEG-4 audio describes traditional type speech and high-quality audio coding algorithms and their combination to enable new functionalities like scalability (hierarchical coding) across the boundaries of coding algorithms. This paper gives an overview of the basic algorithms and how they can be combined. 相似文献