Saeed Mahmoudpour;Myllena A. Prado;Shengyang Zhao;Carla L. Pagliari;Joao Prazeres;Mylène C. Q. Farias;Antonio M. G. Pinheiro;Adrian Munteanu;Peter Schelkens
{"title":"Benchmarking Subjective Quality Assessment Methodologies for Light Field Compression","authors":"Saeed Mahmoudpour;Myllena A. Prado;Shengyang Zhao;Carla L. Pagliari;Joao Prazeres;Mylène C. Q. Farias;Antonio M. G. Pinheiro;Adrian Munteanu;Peter Schelkens","doi":"10.1109/TBC.2026.3661409","DOIUrl":"https://doi.org/10.1109/TBC.2026.3661409","url":null,"abstract":"This study benchmarks the effectiveness of multiple subjective quality assessment (QA) methods for evaluating the perceptual quality of light field (LF) content in the context of image coding applications. A passive visualization approach is adopted, where LF data are rendered as pseudo-video sequences and assessed on calibrated 4K 2D displays under controlled laboratory conditions. Three subjective test protocols, including two rating-based and a pairwise comparison (ranking-based) method, are evaluated through six experimental configurations, incorporating different viewing trajectories and interaction modes. This setup, together with our proposals for deploying inter-rater consistency criteria (e.g., error consistency), enables a comprehensive evaluation of the reliability and suitability of different subjective experiments for LF QA. The results confirm the superior discriminability of the pairwise comparison tests over the rating-based methods. Among the rating-based approaches, the method employing a comparative scale scoring outperformed the one based on an impairment scale. Moreover, the performance of several objective QA metrics was evaluated by comparing their scores against the subjective scores obtained from the three test protocols. The outcomes of this study provide methodological guidance for designing subjective LF quality experiments, highlighting the trade-offs between reliability, sensitivity, and experimental cost, and offer insights relevant to future standardization efforts in LF coding.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"583-597"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marcelo Bender Perotoni;Tarcísio Cordaro;Marcos Stefanelli Vieira;Edson Tafeli C. dos Santos;Yuri Pontes Maciel;Cristiano Akamine
{"title":"Compact Broadband MIMO Antenna Design and Test for the Brazilian TV 3.0","authors":"Marcelo Bender Perotoni;Tarcísio Cordaro;Marcos Stefanelli Vieira;Edson Tafeli C. dos Santos;Yuri Pontes Maciel;Cristiano Akamine","doi":"10.1109/TBC.2026.3671591","DOIUrl":"https://doi.org/10.1109/TBC.2026.3671591","url":null,"abstract":"This article describes the challenge of a Multiple-Input Multiple-Output (MIMO) array for Brazilian Digital TV 3.0. The chosen Advanced Television Systems Committee (ATSC) 3.0 system is the first worldwide to employ <inline-formula> <tex-math>$2times 2$ </tex-math></inline-formula> MIMO antennas, which, in view of the unpredictable indoor environment and long wavelengths, is an engineering challenge. The design, focused on mass indoor environments, is oriented towards a compact, low-cost, and planar radiant system. Since the required bandwidth spans the Very High Frequency (VHF) and Ultra High Frequency (UHF) ranges, miniaturization is the first compromise rather than the standard reflection-loss parameter. A prototype is constructed and tested inside a building room using as reception a test signal broadcast at the center frequency of 177.1428571 MHz, and additionally with four different carriers (177.143MHZ, 277.143MHZ, 587.143MHz and 695.142MHZ), within an anechoic chamber. The proposed compact planar antenna covers the 174–698 MHz band with envelope correlation coefficients below 0.1 and achieves realized gains of nearby 0 dB. Tests in broadcast and anechoic environments confirmed its broadband performance and suitability for low-cost indoor MIMO reception in Brazil’s TV 3.0 system.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"705-712"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marcus Aurélio Ribeiro Manhães;Aldo Esposito;Julio Omi;Edson Tafeli Carneiro dos Santos;Marcos Stefanelli Vieira;Marcelo Bender Perotoni;Ricardo Seriacopi Rabaça;Cristiano Akamine;Gunnar Bedicks
{"title":"Polarization Analysis in TV 3.0 Transmission: Technical Assessment in Different Reception Scenarios","authors":"Marcus Aurélio Ribeiro Manhães;Aldo Esposito;Julio Omi;Edson Tafeli Carneiro dos Santos;Marcos Stefanelli Vieira;Marcelo Bender Perotoni;Ricardo Seriacopi Rabaça;Cristiano Akamine;Gunnar Bedicks","doi":"10.1109/TBC.2026.3666673","DOIUrl":"https://doi.org/10.1109/TBC.2026.3666673","url":null,"abstract":"This article presents a technical analysis of the influ-ence of polarization on terrestrial reception in the TV 3.0 system, also known commercially as DTV+, focusing on the evaluation of polarization effects and their influence over the robustness influence on the robustness of Multiple-Input Multiple-Output (MIMO) operation through polarization diversity. Urban scenarios with different Line-of-Sight (LoS) conditions and two reception environments, outdoor and indoor, were modeled to assess the relative performance of Vertical (V) and Horizontal (H) linear polarizations (0° and 90°), as well as slant polarization (-45° and +45°). The methodology combines vector modeling of the electromagnetic field with parametric simulations based on distance, obstruction, and angular dispersion. The results highlight an asymmetry between V and H polarizations. Horizontal polarization shows superior performance in outdoor environments, while ±45° polarization demonstrated intermediate performance and greater vector stability. The analysis of the Effective Polarization Ratio (EPR) proved decisive in assessing reception robustness. This metric was particularly relevant in indoor reception, where vector degradation can compromise the separation of MIMO streams even at adequate power levels. It is concluded that the choice of polarization should take into account factors such as distance, obstruction, and the predominant reception type. The ±45° configuration is technically interesting due to its balance between robustness, selectivity, and coverage.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"754-763"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"DRL-Based Edge Caching for 360-Degree Video in Broadband Delivery of TV 3.0","authors":"Chunguang Li;Minseok Song","doi":"10.1109/TBC.2026.3679933","DOIUrl":"https://doi.org/10.1109/TBC.2026.3679933","url":null,"abstract":"TV 3.0 integrates broadband into broadcasting systems to support demanding services such as catch-up replay and immersive 360° content, which require adaptive and bandwidth-efficient delivery. However, these services create significant challenges in balancing network traffic and quality of experience (QoE), as popular contents lead to skewed access patterns and heavy bandwidth consumption. In this context, edge caching at broadband nodes is essential to absorb repeated requests, reduce backhaul load, and sustain QoE. To address this, we propose a deep reinforcement learning (DRL)-based caching framework that establishes the relationship between cache capacity, video quality, and backhaul bandwidth. In this framework, the action space determines caching decisions for tile-based video segments, the observation space captures popularity and quality features, and the reward balances QoE gains against bandwidth reduction. In addition, a greedy algorithm is developed to allocate cache space by maximizing a composite metric of segment quality and bandwidth cost. Extensive simulations show that our approach reduces backhaul usage by an average of 60.70% while maintaining QoE, and achieves 1.62% higher average quality compared with existing methods.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"775-789"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paulo Victor Borges;Daniel de S. Moraes;Simone D. J. Barbosa;Sergio Colcher
{"title":"Enhancing TV APPs Authoring With LLM Agents","authors":"Paulo Victor Borges;Daniel de S. Moraes;Simone D. J. Barbosa;Sergio Colcher","doi":"10.1109/TBC.2026.3689310","DOIUrl":"https://doi.org/10.1109/TBC.2026.3689310","url":null,"abstract":"Developing interactive hypermedia applications using the Nested Context Language (NCL) presents significant challenges due to its declarative nature and strict syntactic and semantic requirements. This paper introduces a multi-agent tool powered by large language models (LLMs) to assist in the authoring of NCL 3.0 documents. The proposed tool leverages agents specialized in generating, validating, and refining NCL elements, ensuring syntactic correctness and structural alignment. The tool’s usability, workflow efficiency, and perceived user satisfaction were evaluated through a structured observational study. This work contributes to the field of multimedia systems by providing a scalable, efficient, and user-friendly solution for NCL development, paving the way for the broader adoption of declarative languages in digital TV and multimedia applications.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"616-626"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Image Quality Assessment: Unifying Local and Global Distortions via Fisher Information Geometry and Optimal Sinkhorn Transport","authors":"Hangyu Li;Shiyou Liu;Dongzi Wang;You Zhao;Xuekai Wei;Weizhi Xian;Jielu Yan;Xing He;Yong Feng;Jun Luo;Huayan Pu;Qin Mao;Xia Yang;Mingliang Zhou","doi":"10.1109/TBC.2026.3666657","DOIUrl":"https://doi.org/10.1109/TBC.2026.3666657","url":null,"abstract":"A prevailing limitation of existing full-reference image quality assessment (FR-IQA) methods is their segregated focus on either local texture or global structure, preventing a unified analysis of these two critical and interrelated dimensions of human perception. To resolve this, we propose the Fisher Sinkhorn image quality assessment (FSIQA) framework, which establishes a principled unification of information geometry and optimal transport theory. FSIQA leverages a dual-branch architecture: its Fisher branch captures localized, nonGaussian texture distortions by modelling higher-order statistics on a Riemannian manifold, whereas the complementary Sinkhorn branch assesses global structural deformations via entropy-regularized optimal transport. This synergistic framework creates a mathematical continuum for local-to-global degradation analysis and is notably independent of the backbone network architecture, thus requiring no dataset-specific retraining. Comprehensive experiments across five benchmark datasets validate the efficacy of our approach, demonstrating that FSIQA consistently outperforms existing methods and establishes a new state-of-the-art method in the field.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"570-582"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Multi-IRS-Assisted NOMA for Federated Learning in Broadcast Networks","authors":"Songchao Chen;Fang Liu;Yuanan Liu;Fan Wu","doi":"10.1109/TBC.2026.3664220","DOIUrl":"https://doi.org/10.1109/TBC.2026.3664220","url":null,"abstract":"With the rapid advancement of sixth-generation (6G) wireless communications, broadcasting systems are evolving to support large-scale content distribution and real-time multi-user connectivity. Distributed computation has become a key enabler in this context, while growing concerns over data privacy, efficiency, and decentralized data sources have highlighted federated learning (FL) as a promising solution. In this work, we propose an FL framework supported by multiple intelligent reflecting surfaces (IRSs) and non-orthogonal multiple access (NOMA) to enhance the reliability and performance of broadcasting networks. IRSs are dynamically adapted to assist the transmission links between users and the base station (BS), thereby improving the accuracy of local model delivery and global model updates. To optimize the proposed system, we formulate a minimization problem targeting the FL loss function. We begin by deriving an analytical solutionfor the expected convergence behavior of the FL algorithm, capturing the impact of wireless channel conditions. Leveraging Jensen’s inequality, we transform the original problem into two iterative sub-problems, from which we obtain the optimal IRS phase shifts and user transmit power. Additionally, we introduce an auction-based IRS allocation algorithm to further reduce the FL loss. At the system level, we jointly exploit NOMA-enabled multi-user access and IRS-based dynamic channel enhancement, allowing more users to participate in FL through broadcasting channels with reduced packet loss, thereby improving model performance. Simulation results demonstrate that the proposed framework significantly outperforms existing benchmarks in reducing FL loss, while improving model accuracy and real-time convergence in broadcast-oriented wireless systems.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"418-433"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"IEEE Transactions on Broadcasting Information for Readers and Authors","authors":"","doi":"10.1109/TBC.2026.3699192","DOIUrl":"https://doi.org/10.1109/TBC.2026.3699192","url":null,"abstract":"","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"C3-C4"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11563693","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hardware-Friendly Algorithm Optimization and Acceleration for 8K UHD Image and Video Broadcasting","authors":"Hang Yuan;Wei Gao","doi":"10.1109/TBC.2026.3679969","DOIUrl":"https://doi.org/10.1109/TBC.2026.3679969","url":null,"abstract":"Efficient implementation plays a critical role for real-time 8K Ultra-High-Definition (UHD) video broadcasting with the new generation video coding standards. Specifically, the more complex Coding Unit (CU) partitioning rules in new standards make it much more challenging to design efficient acceleration strategies. This paper proposes a light-weight hardware-friendly acceleration algorithm for CU partitioning, which is the bottleneck to implementing the Versatile Video Coding (VVC) based real-time intra codec for 8K video broadcasting on hardware platform. According to the CU partitioning rule, we first propose an novel One-Pass framework to determine CU split results, which can effectively reduce time complexity and hardware resources incurred by the original iterative decision process. Second, taking into account the characteristics of hardware platform, the efficient calculation methods based on Map-Reduce model and hardware-oriented optimizations are designed for gradient and histogram difference features required by our One-Pass framework. Finally, we design a reference hardware architecture to validate the effectiveness of the proposed algorithm to support real-time 8K video broadcasting. Besides, a light-weight 8K UHD video dataset including diverse content is also provided to more reliably illustrate the coding performance of our algorithm. Experimental results show that our method is capable of the real-time CU division on Xilinx VU440 FPGA at 200 MHz, where the single-path can support 8K videos at 45 frames per second (fps), and 135 fps also can be achieved with multi-path parallelism. As far as we are aware, the proposed algorithm has attained state-of-the-art performance for the hardware-friendly acceleration of CU partitioning with the least loss in VVC standard.","PeriodicalId":13159,"journal":{"name":"IEEE Transactions on Broadcasting","volume":"72 2","pages":"463-476"},"PeriodicalIF":5.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}