Sub-band Coding

Algorithms of digital audio hiding based on sub-band coding

基于子带编码的数字音频隐藏算法研究

Implement 10.4kbt/s Wideband Speech Code Based on the Theory of Sub-band Coding

基于子带编码原理的10.4kbt/s宽带语音编码实现

Wavelet transform coding technique is a fine breakthrough of traditional Sub-band coding .

小波变换编码技术是传统子带编码技术的一大突破，目前普遍受到国际编码领域的重视。

The mathematical foundation of the sub-band coding approach is the wavelet packet of the wavelet analysis .

子带编码方法的数学基础源于小波分析中的小波包思想。

Sub-band coding is a means to accomplish bandwidth compression of HDTV signals .

子带编码是实现高清晰度电视频带压缩的一种方法。

The other question is that as to the harmonic wavelet which kind of the wavelets can be the sub-band coding approach to be used .

二是对于小波中的特殊小波谐波，它能否用子带编码的方法进行研究。

The proposed method compresses images based on sub-band coding , and then exacts compressed images features such as color , texture and shape .

本系统直接对小波压缩图像进行分析，提取压缩域低频图像的颜色、纹理、形状特征，然后通过判别函数判别图像的相似性。

The system consists of time-domain harmonic scaling ( TDHS ) and sub-band coding ( SBC ) - two different speech compression algorithm .

该系统由时域谐波定标（TDHS）及子频带编码（SBC）两种不同的语音压缩算法组成。

Wavelet is an unified processing framework for various signals processing method , such as muti-scale analysis , time-frequency analysis and sub-band coding . The useful information can be extracted by wavelet transform .

小波能从信号中提取有用的信息成分，是各种信号处理方法（如多尺度分析、时频分析和子带编码）的统一处理框架。

Secondly , took first order autoregression process as an input image model , and using two-channel 7 / 5-tap wavelet filter bank which satisfied the perfect reconstruct condition to implement sub-band coding , and calculate the maximum values of the coding gain and corresponding free lifting parameter α values .

其次，以白噪声的一阶自回归过程作为输入图像模型，并采用满足完全重构条件的双通道7/5小波滤波器组进行子带编码，同时计算最大编码增益及其α值。

729 standard and the principle of Mixed Excitation Line Prediction ( MELP ) coding decoding are completely and systemic introduced . The theory of sub-band coding is researched , basing on the theory of sub-band coding , so 14.4kbit/s and 10.4kbit/s wideband speech coding can be simulated to realization .

本文的全面系统地介绍了G.729标准与混合激励线性预测语音编解码的原理，子带编码的原理，并基于该原理仿真实现14.4kbit／s和10.4kbit／s的宽带语音编码的实现方法。