基于DSP和DDS的数字立体声调频发射系统

介绍了计算机控制的数字立体声调频发射机的设计。该系统利用DSP实现数字立体声调制,并通过AD9852DDS芯片将数字信号转换成射频信号。系统采用计算机控制,接收S／PDIF接口的数字音频输出,适合校园数字调频广播和外语听力训练。     

数字信号处理型的调频立体声接收机

本文提出了一种对调频立体声和调频单声用数字信号处理(DSP)进行解调的新方法。     

BA1404调频立体声发射芯片的原理与应用

BA1404是日本ROHM公司生产的为数不多的调频发射集成电路之一.它是将立体声调制、FM调制和RF放大功能集成在一个芯片上制成的.本文详细论述了具有广泛应用的立体声调频发射集成电路BA1404的结构组成和工作原理,并给出了典型的应用电路.     

山灵MC-2音乐中心

集合了CD、收音调谐功能与立体声放大器为一体的迷你型组合。CD部分采用飞利浦VAM-12转盘／CU-7II伺服系统以及PCM1732的解码芯片，收音调谐则有FM／AM两组，立体声放大器的输出功率达到750WX2，足以应付小空间里的使用了。重约8．8kg。     

16/20位立体声音频编解码器PCM3002

PCM3002是TI公司推出的16／20位立体声音频编解码芯片。文中简要分析了该芯片的性能特点和工作原理，给出了PCM3002的典型应用电路。     

Broadcom公司立体声耳机蓝牙EDR芯片

Broadcom公司推出适用于无线立体声耳机的优化单芯片蓝牙解决方案BCM2037。这款新型芯片具有先进的数码音频处理和增强的数据率（EDR），为改善终端用户体验提供了优良的音频保真度和更长的电池寿命。新芯片是为Broadcom提供的立体声耳机专门设计的第一款蓝牙芯片，也是公司收购无线音频专家Zeevo公司后，利用Zeevo公司的技术生产的第一个产品。芯片包括一个蓝牙基带和无线电接收器，以及一个旨在为无线立体声耳机用户提供最好音频体验的优化架构。特别是，     

三星YP-T9B

毫无疑问，三星YP-T9B依靠内置A2DP立体声蓝牙芯片而抢占了市场的先机。这款最近市场的热门机型为用户提供了一种新鲜的无线音乐享受方式，而你只需要配上一副立体声蓝牙耳机，虽然这需要让你再掏些银子，不过对于那些痴迷蓝牙或喜欢扮酷的群体而言，     

雅马哈Ymersion芯片YSS247

<正> 随着家庭影院的普及,双声道模拟3D声场的技术不断推陈出新。雅马哈的专利Ymersion立体声增宽技术就是最新的一种。它结合了反相串音、头相关传输特性和频谱能量平衡等多项技术,用普通双声道立体声设备来产生更宽和更靠近听众的三维立体声感。这种技术可用于普通立体声和模拟杜比影音音源。利用这一原理制成的LSI芯片YSS247,价格低廉、适合加装在各种普及型音响设备中。     

Broadcom蓝牙芯片系列实现具语音识别能力的立体声耳机

博通（Broadcom）公司近日推出新的蓝牙单芯片系统（SoC）解决方案系列BCM2077x,该系列蓝牙芯片用于实现立体声耳机产品。新芯片使耳机既能播放立体声音乐,又能具有传统的蓝牙免提式电话通话功能,此外该系列芯片还内置了业界领先的Broadcom SmartAudio技术,可使多种档次的耳机具有引人注目的特色。Braodcom BCM2077x系列包括3款蓝牙芯片,适用于入门级、主流和高端立体声耳机。     

马兰士SA7001 SACD播放机

这款马兰土目前最平价的立体声SACD播放机采用到可进行TDSD信号处理和24Bit／192kHz精度的CS4397解码芯片及独家的HDAM模块。电源回路上，解码与模拟放大部分均为独立设置。除了配备立体声模拟输出外，同时还有同轴／光纤的数码输出。     

A least-squares-based 2-D filtering scheme for stereo imagecompression

A two-dimensional (2-D) least squares (LS)-based filtering scheme for high fidelity stereo image compression applications is introduced in this correspondence. This method removes the effects of mismatching in a stereo image pair by applying the left image as the reference input to a 2-D transversal filter while the right image is used as the desired output. The weights of the filter are computed using a block-based LS method. A reduced order filtering scheme is also introduced to find the optimum number of filter coefficients. The principal coefficients and the disparity vectors are used together with left image to reconstruct the right image at the receiver, The proposed schemes are examined on a real stereo image pair for 3D-TV applications and the results were benchmarked against those of the block-matching method.     

边海防立体监视系统组网探测技术研究

对边海防立体监视系统设计及组成进行了深入的分析,在此基础上,建立了多传感器组网探测的数学模型,提出了基于贝叶斯网络的立体监视系统组网探测技术,并基于此实现了高探测率、低虚警率的边海防立体监视联动探测方案。     

An asymmetric post-processing for correspondence problem

This paper presents a novel approach that performs post-processing for stereo matching. We improve the performance of stereo matching by performing consistency check and adaptive filtering in an iterative filtering scheme. The consistency check is only done with asymmetric information so that very few additional computational loads are necessary. The information in the valid pixels is propagated into invalid pixels through the adaptive filtering. The proposed post-filtering method can be used in various methods for stereo matching. We demonstrate the validity of the proposed method by applying it to hierarchical belief propagation and semi-global matching. The performance of the post-processing method for hierarchical belief propagation is comparable to state-of-the-art methods in the Middlebury stereo datasets. In order to verify the performance of asymmetric consistency check, we compare it with other reliability estimation methods in the proposed post-processing scheme. Moreover, in order to verify the performance of post-filtering method in noisy environment, the proposed post-filtering method is applied to the stereo images denoised by NL-means algorithm. We find that the iterative filtering scheme reduce an error which may be caused in stereo matching for the denoised images and improve the performance of stereo matching.     

Very low bit-rate coding algorithm for stereo video withspatiotemporal HVS model and binary correlation disparity estimator

A strategy for efficiently coding stereo video sequences is investigated. To fully utilize the suppression and the contrast sensitivity property of the human visual system, a novel coding scheme with two special mechanisms, the spatiotemporal HVS model and the binary correlation disparity estimator, is proposed to efficiently reduce the video signal redundancy and the computational complexity, while maintaining a high subjective image quality. Compared with existing stereo video coding systems, the proposed coding scheme supports a lower transmission bit rate and has less computational complexity. The simulation results also show that the subjective image quality of the reconstructed full color stereo sequences at 0.25-0.4 bits per pixel (bpp) is satisfactory     

Object-based stereo video compression using fractals and shape-adaptive DCT

Based on the classical fractal video compression method, an improved object-based stereo video compression scheme with Shape-Adaptive DCT is proposed in this paper. Firstly, we use more effective macroblock partition scheme instead of classical quadtree partition scheme; thus reducing the block searching strategy. The stereo fractal video coding is proposed which matches the macroblock with two reference frames in left and right view results in increasing compression ratio and reducing bit rate when transmitting compressed stereo data. The stereo codec combines the Motion Compensation Prediction (MCP) and Disparity Compensation Prediction (DCP). Fractal coding is adopted and each object is encoded independently by a prior video segmentation alpha plane, which is defined exactly as in MPEG-4. The testing results with the nature monocular and stereo video sequences provide promising performances at low bit rate coding. We believe it will be a powerful and efficient technique for the object-based monocular and stereo video sequences coding.     

基于联合预测的立体视频压缩编解码系统

提出了一种新颖的立体视频压缩编解码系统,通过采用结合3种预测方式的联合预测方法来获得较高的编解码效率以及较低的计算复杂度,改善了视频的质量.     

Recurrent pattern matching based stereo image coding using linear predictors

The Multidimensional Multiscale Parser (MMP) is a pattern-matching-based generic image encoding solution which has been investigated earlier for the compression of stereo images with successful results. While first MMP-based proposals for stereo image coding employed dictionary-based techniques for disparity compensation, posterior developments have demonstrated the advantage of using predictive methods. In this paper, we focus on recent investigations on the use of predictive methods in the MMP algorithm and propose a new prediction framework for efficient stereo image coding. This framework comprises an advanced intra directional prediction model and a new linear predictive scheme for efficient disparity compensation. The linear prediction model is the main novelty of this work, combining adaptive linear models estimated by least-squares algorithm with fixed linear models provided by the block-matching algorithm. The performance of the proposed intra prediction and disparity compensation methods when applied in an MMP encoder has been evaluated experimentally. Comparisons with the current stereo image coding standards showed that the proposed MMP algorithm significantly outperforms the Stereo High Profile of H.264/AVC standard. In addition, it presents a competitive performance relative to the MV-HEVC standard. These results also suggest that current stereo image coding standards may benefit from the proposed linear prediction scheme for disparity compensation, as an extension to the omnipresent block-matching solution.     

Transmission scheme of high-capacity FM multiplex broadcastingsystem

FM multiplex broadcasting is a system for providing additional text and graphics, while maintaining compatibility with existing stereo sound broadcasting. The digital signals are multiplexed in a higher frequency band than baseband FM stereo signals. This paper describes a modulation method and an error correction method for a new high-capacity FM multiplex broadcasting system called DARC (Data Radio Channel), which has a bit rate of 16 kbit/s. Simulation results show that stereo sound signals interfere with a multiplexing signal under multipath conditions. LMSK (level controlled MSK) is proposed as a modulation scheme to ensure good transmission quality. It is shown that an error correction scheme using a product code of (272190) codes has a good performance for mobile reception. Field tests on the DARC for mobile reception are conducted in the service area of the NHK Tokyo FM station. These show that the correct reception rate can be obtained at more than 80% when transmitting information of 6 kbytes     

自适应选择联合补偿预测模式的立体视频编码算法

运动补偿预测．视差补偿预测以及两者相结合的联合补偿预测是研究立体视频编码的关键技术。不同预测模式不仅考虑了左右视频通道各自的时间相关性、而且考虑到了左右视频通道之间的空间相关性。本文提出了一种自适应选择预测模式的立体视频编码算法,并在预测模式确定后通过选取不同的加权值来达到联合补偿预测的目的。实验结果表明,本文提出的算法在改善编码性能的同时,提高了编码速度。     

基于BJND模型的立体图像鲁棒水印算法

随着3D技术的发展,3D电影逐渐进入到一个快速发展阶段.低感知强鲁棒的数字水印方案是水印技术在3D电影版权保护应用中的一项研究重点.已有的研究证明,基于HVS的JND模型在提高水印不可见性上具有很好的效果,但是现有的JND模型大都建立在单目视觉掩蔽特性基础上,而对于立体图像需要进一步考虑双目视觉掩蔽特性.提出了一种基于BJND(Binocular JND)模型的立体图像鲁棒水印算法.水印嵌入强度受BJND值调制后,使得水印表现出更好的透明性.实验结果证明,在水印不可见的条件下,基于BJND模型的立体水印方案在抵抗加噪、JPEG压缩等全局攻击上具有更强的鲁棒性.