Academy of Broadcasting Planning

Beijing, China

Academy of Broadcasting Planning

Beijing, China
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Deng X.,Academy of Broadcasting Planning | Cao X.,Nanjing University | Dai Q.,Tsinghua University | Dai Q.,Tsinghua National Laboratory for Information Sciences and Technology
Chinese Journal of Electronics | Year: 2016

This paper proposes a novel representation method which is called Depth and residual images based representation (DRIBR) for virtual image rendering in 3D video. The proposed DRIBR is composed of three parts: a single view image from one particular viewpoint, its corresponding depth map as well as a residual image. The residual image is pre-calculated from the combination of the above two components plus an image taken from the other viewpoint. The proposed DRIBR achieves low data redundancy, and resolves the occlusion problem which is one of the most annoying artifacts during the rendering of virtual image in traditional Depth image based rendering (DIBR). This paper addresses details of DRIBR and virtual image rendering algorithms based on the proposed format. We test the DRIBR on various stereo datasets and the experimental results demonstrate that our method can achieve better performance on both subjective and objective quality assessment. © 2016 Chinese Institute of Electronics.


Wu X.,Academy of Broadcasting Planning | Wang N.,China Academy of Information and Communication Technology | Zhang Z.,HWA Technology Co. | Kuster N.,SPEAG Co. | Wang W.,Beijing University of Posts and Telecommunications
APCAP 2016 - 2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation, Conference Proceedings | Year: 2016

The latest industry comparison tests are ongoing in 3GPP for MIMO OTA measurement methods standardization. The offset between RTS (Radiated Two-Stage method) and MPAC (Multi-Probe Anechoic Chamber method) are introduced in this paper. The repeatability of MPAC itself is also studied. Furthermore, the hand phantom effect in MPAC is discussed for the first time by analyzing actual measurement results. © 2016 IEEE.


Tu Q.,Beijing University of Posts and Telecommunications | Feng J.,Academy of Broadcasting Planning | Qi J.,Beijing University of Posts and Telecommunications | Men A.,Beijing University of Posts and Telecommunications | Ye F.,Fujian Normal University
Proceedings - IEEE International Conference on Multimedia and Expo | Year: 2014

H.265/HEVC aims to provide significant improvement of compression performance compared with previous coding standards at cost of significant computation complexity. In this paper, an adaptive CU mode decision mechanism (ACMD) based on Bayesian decision theory is proposed to accelerate mode selection procedure. Specifically, the homogeneous determination is firstly utilized to filter out non-split LCU and then the feature space related to CU mode decision is introduced, which is divided into two regions according to Bayesian risk. Bayesian classifier is employed in low-risk region while in high-risk region, the mode decision is made by rate distortion cost. Experimental results demonstrate that the proposed algorithm provides averagely 34.28% encoding time reduction while maintaining the same level of perceptual visual quality, compared with HEVC test mode (HM 10.0) encoder with low-delay configurations. © 2014 IEEE.


Sun S.,Beijing University of Posts and Telecommunications | Gong L.,Academy of Broadcasting Planning | Rong B.,Communications Research Center Canada
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2015

This paper proposes a spectrum sharing scheme based on Stackelberg game exploiting the SON features of 3GPP LTE-A Het- Nets. In the game, the MeNB controls and prices the available spectrum resource which the PeNBs can purchase and use to serve the Pico-cell as well as offload some macro-users. Both kinds of nodes try to maximize their own utility which is consisted of user data rates, earning and expenditures on spectrum trading. During the dynamic interaction of the game, the interference coordination features of the LTE-A SON, such as cell range expansion (CRE), is employed so that the change of spectrum allocation can be fully exploited. Simulation results show that the proposed approach can significantly improve the throughput of victim users with slight network total throughput degradation. © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2015.


Wu X.,Academy of Broadcasting Planning | An X.,China Academy of Information and Communication Technology | Zhang Z.,HWA Technology Co. | Wang W.,Beijing University of Posts and Telecommunications | Su M.,Beijing University of Posts and Telecommunications
2015 9th European Conference on Antennas and Propagation, EuCAP 2015 | Year: 2015

The state of the art in measurement methods for the Multiple Input Multiple Output (MIMO) capable equipment are discussed in this paper. The principles of four anechoic chamber based candidates in standardization organizations are explained. Conventionally, most of these candidates would ask for 8 probes or more to perform test correctly. The idea of Selectively Distributing Probes Algorithm (SDPA) is briefly introduced, which reveals the possibility to reduce the number of required probes used for channel reconstruction. The effectiveness of this algorithm is proved by both simulations and practical measurements under Urban Microcell (UMi) channel model. © 2015 EurAAP.


Mao J.Y.,Communication University of China | Li Z.R.,Communication University of China | Guo Q.X.,Communication University of China | Zhang H.,Communication University of China | And 3 more authors.
Journal of Electromagnetic Waves and Applications | Year: 2012

This paper presents the design and implementation of a novel Quasi-Yagi antenna with arrow-shaped driven element and a director for DTV applications. The proposed antenna has three resonant frequencies in the operating frequency band. Both simulation and measurement results show that the operating frequency bandwidth of the antenna for S11 < - 10 dB covers the DTV band (490-798 MHz), and the relative bandwidth is 48%. Far field measurements in azimuth plane and elevation plane show that the radiation patterns are stable and end-fire within the DTV band at frequencies of 530, 666 and 754 MHz. © 2012 Taylor & Francis.


Chen L.Y.,Communication University of China | Li Z.R.,Communication University of China | Zhang H.,Communication University of China | Zhang X.Q.,Beijing Research Institute of Chemical Defense | And 2 more authors.
Journal of Electromagnetic Waves and Applications | Year: 2012

A metal-plate monopole antenna for indoor digital television (DTV) signal coverage in the Ultra High Frequency (UHF) is presented. The proposed antenna is a planar metal-plate monopole with symmetrical bevels, which is easily fabricated by a single metal plate. Parametric study on the metal-plate parameters is conducted to achieve a return loss of 10 dB over the DTV band frequency range (470-860 MHz). The stability of the radiation pattern is also presented. © 2012 Taylor & Francis.


Li Z.R.,Communication University of China | Chen L.Y.,Communication University of China | Zhang H.,Communication University of China | Guo Q.X.,Communication University of China | And 4 more authors.
Journal of Electromagnetic Waves and Applications | Year: 2013

In this paper, the design, simulation results, and measurements of a coaxial-fed dual-polarized patch antenna with high port isolation are presented. The proposed antenna consists of two cross center-fed patch dipole antennas against a reflector as ground plane, while the patch antenna contains two pairs of X-shaped slots along the diagonals and two pairs of T-shaped slots along the centerlines. The proposed antenna achieves a-10 dB with bandwidth of 470-730 MHz and demonstrates the dual polarization in both directions. Stable radiation patterns at slanted polarization have been obtained within the band. Measurements show two linear polarizations with an isolation of more than 33 dB over the operating frequency band. The proposed antenna can be used for Digital television applications (DTV). © 2013 Taylor and Francis Group, LLC.


Deng X.,Academy of Broadcasting Planning | Zheng G.,Academy of Broadcasting Planning | Jia T.,Academy of Broadcasting Planning | Cao X.,Nanjing University
2015 International Conference on 3D Imaging, IC3D 2015 - Proceedings | Year: 2015

In this paper, the tolerance of the brightness and the color distortions of stereoscopic images are discussed based on extensive experimental studies. We explore the tolerance of the brightness and distortions, including overall luminance difference, white clip level inconsistency, black clip level inconsistency, and color distortions, between left and right images. The experiment result demonstrates that overall luminance difference should be below 8%, white clip level inconsistency should be within 6%, black clip level inconsistency cannot be higher than 10%, and color distortions should not exceed 16°. We also conduct a comparison over these indices with previous studies from standards and research communities. © 2015 IEEE.


Patent
Shenzhen Topway Video Communication Co., Academy Of Broadcasting Planning, Topvision Technologies Co., Huawei, Zte Corporation and Cisco Systems | Date: 2013-03-12

The present invention provides a cable TV broadband access system with distributed deployment and centralized control, which comprises: a system terminal end, configured to receive and transmit uplink and downlink service data, and receive and respond to access control data and management control data; a system access end, configured to implement data format transformation and data forwarding or processing for said uplink and downlink service data, said access control data and said management control data of said system terminal end, and transmit, receive and respond to management control data of said system access end; a system head end, configured to implement management control and access control for said system access end and said system terminal end, and process, converge and forward said uplink and downlink service data. Said system uses a system architecture with three-stage distributed deployment and centralized control comprising a system terminal end, a system access end and a system head end, and it can not only realize the end-to-end control management and QoS priority assurance of the broadband data service, but can also realize easy network deployment, low comprehensive cost and high management efficiency.

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