电视综艺节目环绕声直播的声音创作观(下)

"电视综艺节目环绕声直播的声音创作观(上)"就哈里斯先生在环绕声电视综艺节目直播的声音创作实践与观念,讲述了格莱美颁奖典礼电视直播混音二十年的发展历程与变革。"电视综艺节目环绕声直播的声音创作观(中)"和"电视综艺节目环绕声直播的声音创作观(下)"分别回顾了在中影基地进行杜比培训期间,同大师关于电视环绕声创作的交流,以及对电视综艺节目环绕声直播的声音创作观念的若干思考。     

DRA分层音频编码技术

提出了一种与DRA编码算法兼容的分层音频编码算法,其中环绕声分层编码采用了声道分类方式,而单声道/立体声分层编码则以残差再编码作为增强层的框架。分析和测试结果表明该DRA分层编码算法能够提供较好的声音质量,可作为信源编码与信道编码和分层调制技术完美结合应用于我国数字音频广播。     

传统广播与移动宽带融合网络的4种方案解析

长期以来,地面电视广播与移动通信有着截然不同的业务形态、管制方式、产业链结构、网络架构、终端形态等。而当下,随着业务层面、终端层面等的融合,传统经典广播网络与移动宽带网络相融合已成发展趋势。介绍了国内外所提出的4种融合型网络解决方案(基于UHF频段的4G电视广播、叠加型网络、共用广播系统、NGB-W)及其研究现状。     

Efficient multi‐hop wireless broadcast protocol in vehicular networks using automated threshold function design

Vehicular networking applications often use multi‐hop wireless broadcasting as a primary data dissemination mechanism. Therefore, protocols that efficiently and thoroughly propagate application data while adapting to a wide range of network density, vehicle distribution pattern, channel quality, and other conditions are critical for vehicular communications. Here, we design the Statistical Vehicular Broadcast (SVB) protocol to efficiently distribute data via multi‐hop broadcast in vehicular networks. First, we present an automated optimization technique for the design of threshold functions in statistical broadcasting methods. Next, we compare and analyze known statistical techniques, including different fundamental methods, assessment delay algorithms, and failsafe mechanisms. All combinations of these techniques are given threshold functions optimized using the proposed automated procedure then are evaluated in a wide range of simulations. High‐level statistical design principles and recommendations are established based on analysis of these results. Finally, we apply those principles to design SVB. It is evaluated in JiST/SWANS and is shown to achieve a high target reachability level while consuming less bandwidth than similar protocols across urban and highway vehicular networking scenarios.Copyright © 2014 John Wiley & Sons, Ltd.     

船用数字广播电视系统方案设计与实践

结合船舶广播电视的需求,应用H.264视频压缩技术以及流媒体等技术,提出了基于IPTV技术体制的船舶数字广播电视系统方案.从系统的技术体制和业务功能出发,详细介绍了系统的组成和体系结构,并对系统的一些关键技术进行了阐述.     

Coexistence of OFDM‐Based IMT‐Advanced and FM Broadcasting Systems

Coexistence analysis is extremely important in examining the possibility for spectrum sharing between orthogonal frequency‐division multiplexing (OFDM)‐based international mobile telecommunications (IMT)‐Advanced and other wireless services. In this letter, a new closed form method is derived based on power spectral density analysis in order to analyze the coexistence of OFDM‐based IMT‐Advanced systems and broadcasting frequency modulation (FM) systems. The proposed method evaluates more exact interference power of IMT‐Advanced systems in FM broadcasting systems than the advanced minimum coupling loss (A‐MCL) method. Numerical results show that the interference power is 1.3 dB and 3 dB less than that obtained using the A‐MCL method at cochannel and adjacent channel, respectively. This reduces the minimum separation distance between the two systems, which eventually saves spectrum resources.     

广电网络的运营环境与应对措施

新技术的发展与三网融合的推进使有线电视网络的运营受到IPTV、OTT的挑战和冲击,在这种形势下,有线电视网络的业务必将发生革命性的变化,视频、数据、语音业务将全面展开,有线电视网络在现网基础上进行快速的低成本的改造,尽快形成下一代广播电视网络更是当前面临的重大课题。     

探讨广播电视业务传播中对OTN传输技术的应用

OTN技术具有安全可靠、容易管理以及业务灵活调度等特点。目前,3D电视以及高清电视开始实施互动点播的业务,因此广播电视行业开始传输大速率的广播电视业务。OTN技术具有交叉调动,实现了对不同速率业务的混合传输和灵活调度。     

Novel Hybrid Content Synchronization Scheme for Augmented Broadcasting Services

As a new hybrid broadcasting service, augmented broadcasting shows enhanced broadcasting content on a large TV screen, while augmented reality (AR) on a mobile device augments additional graphical content onto an input image from the device's own camera to provide useful and convenient information for users. A one‐sided broadcasting service using AR has already been attempted in virtual advertisements during sport broadcasts. However, because its augmentation is preprocessed before the video image is transmitted, the viewer at home may have no influence on this formation; and no interaction for the user is possible unless the viewer has a direct connection to the content provider. Augmented broadcasting technology enables viewers to watch mixed broadcasting content only when they want such service and to watch original broadcasting content when they do not. To realize an augmented broadcasting service, the most important issue is to resolve the hybrid content synchronization over heterogeneous broadcast and broadband networks. This paper proposes a novel hybrid content synchronization scheme for an augmented broadcasting service and presents its implementation and results in a terrestrial DTV environment.     

ZV—1000公共广播系统及其应用

本文较全面介绍ZV-1000公共广播系统产品的特点、组成及功能,并列举在商场、宾馆等典型公共广播系统中的应用。最后指出:该系统作为替代进口产品,在国内公共广播系统工程中有着广泛的应用前景。