Digital Broadcasting Services Research Articles

Fast Decoding of Polar Codes for Digital Broadcasting Services in 5G

Fast Decoding of Polar Codes for Digital Broadcasting Services in 5G

Future 5G mmWave TV Service With Fast List Decoding of Polar Codes

The commercial deployment of 5G technology has brought new opportunities and challenges to digital broadcasting service. Digital broadcasting, together with other applications, will have to rely on 5G mmWave channel to transmit high quality signals. In mmWave band, channel coding is a key technology to ensure reliable information transmission and quality of service. This paper correspondingly proposes a fast simplified multi-bit successive cancellation list (Fast-SMSCL) decoding method for polar codes, with FPGA implementation details. Simulation study shows that our proposed method makes fully use of consecutive information bits and achieves prominent latency reduction compared to the conventional simplified multi-bit successive cancellation list decoding.

Transparent antenna using a μ‐metal mesh on the quarter glasses of an automotive for DMB service receiving

AbstractThis study aims to design a transparent antenna that operates at a digital multimedia broadcasting (DMB) service band (174‐216 MHz) for an automotive (Hyundai K5). The transparent antenna designed on the quarter glasses located on both sides of an automotive to avoid space limitation typically placed in a roof‐mounted shark‐fin. Moreover, the use of a micro‐metal mesh film (μ‐MMF) enables the antenna to minimize visual perception and size consideration through its transparency. Two types of transparent antennas (inverted F antenna; Case1 and top‐loading inverted F; Case 2) are designed, fabricated, and measured. The transparent antennas have an average peak gain of 13.2 dBi for the inverted F antenna and 12.54 dBi for the top‐loading inverted F in the overall DMB service band. The receiving RF power (dBm) of the antenna on the quarter glasses is compared for the reliability of the signal reception in two separate locations. The power level has a difference of less than 3 dBm by location and direction.

ACHIEVING MAXIMUM SFN SIZE FOR A DVB-T2 TRANSMISSION SYSTEM

The GE-06 Agreement “On planning the terrestrial digital broadcasting services in parts of Region 1 and 3, in the frequency bands of 174-230 MHz and 470-862 MHz” has been based in the DVB-T system of transmission. Most of the signatory countries of this agreement use or are going to use the most advanced digital terrestrial technology such as DVB-T2. One of the main advantages of DVB-T2 comparing with DVB-T is an increased size of SFN networks, which is closely related with guard interval or inter-transmitters distances. To achieve the maximum size of DVB-T2 SFNs, it is important to find optimal parameters of DVB-T2 networks. But even though the GE-06 Plan gives opportunities to implement DVB-T2 there are some limitations on using all its benefits. One of these limitations is the availability to increase the distance between transmitters because changes in the location of any transmitter require long and intensive coordination with neighboring countries. The aim of this paper is to investigate the optimal DVB-T2 networks configuration for two existing SFN networks in Albania with the purpose to achieve maximum SFN size without adding transmitters or changing the location of existing transmitters.

Channel-Allocation Plan for National and Local T-DAB Services in VHF Band III

The digital audio broadcasting (DAB) system is mainly designed for large-area coverage and is suited for a single-frequency network (SFN) operating in Very High Frequency (VHF) Band III. To operate successfully, the SFN requires a different network-planning approach for multiple-frequency networks and should avoid self-interference. This paper focuses on nationwide SFN planning and DAB channel-allocation planning to replace all frequency-modulation (FM) services with terrestrial DAB services in VHF Band III. In South Korea, VHF Band III has been used for terrestrial digital multimedia broadcasting (T-DMB) services; thus, available frequencies should be investigated for T-DAB services and the nationwide SFN. An approach for broadcasting channel-interference analysis is proposed herein. For the interference analysis, the geographical features and the information for stations of legacy FM radio broadcasting and T-DMB, such as transmission parameters, are considered. The ratio of the interference area to the coverage is calculated via the channel-interference analysis. Areas affected by the self-interference in the nationwide SFN are investigated. The results of this paper provide insights regarding channel-allocation planning for T-DAB services and an approach for nationwide SFN planning.

Objective Assessment of Perceptual Audio Quality Using ViSQOLAudio

Digital audio broadcasting services transmit substantial amounts of data that is encoded to minimize bandwidth whilst maximizing user quality of experience. Many large service providers continually alter codecs to improve the encoding process. Performing subjective tests to validate each codec alteration would be impractical, necessitating the use of objective perceptual audio quality models. This paper evaluates the quality scores from ViSQOLAudio, an objective perceptual audio quality model, against the quality scores of PEAQ, POLQA, and PEMO-Q on three datasets containing fullband audio encoded with a variety of codecs and bitrates. The results show that ViSQOLAudio was more accurate than all other models on two of the datasets and performed well on the third, demonstrating the utility of ViSQOLAudio for predicting the perceptual audio quality for encoded music.

Willingness to Pay for Elderly Telecare Service Using the Internet and Digital Terrestrial Broadcasting.

BackgroundIn Japan over the past few years, more attention has been focused on unnoticed solitary death in the context of an aging society and the trend toward nuclear family. A number of institutions and companies have implemented a prevention measure with digital terrestrial broadcasting telecare services for the elderly: Hokkaido University; TV-Asahi Corporation; Hitachi, Ltd; Iwamizawa City; Hokkaido Television Broadcasting Co, Ltd; and Hamanasu Information Co, Ltd. Although this system is provided free of charge as a demonstration test, determining the appropriate price for the service is required for its sustainable operation.ObjectiveThe aim of this study was to quantify individual willingness to pay (WTP) so as to test the tenability of digital terrestrial broadcasting service for elderly telecare.MethodsWe used the contingent valuation method (CVM) to estimate the WTP for this service among 305 citizens (valid response rate 76.0%) living in Japan. A questionnaire survey was conducted for people aged 18 to 100 years according to Japanese age distribution from September 2016. To elicit WTP, we adopted a double-bound dichotomous choice method to ask the respondents whether they agree or disagree with the price we offered.ResultsThe median WTP for this service’s monthly fee is estimated to be 431 JPY (approximately US $3.7). The finding suggests that gender (0.66, P=.01), health consciousness (1.08, P=.01), willingness to use (2.38, P<.001), and seeing others less than once a week (1.00, P=.06) made a positive effect on WTP.ConclusionsWe conclude that reliable WTP was elicited by CVM based on an Internet survey. Calculated median WTP for digital terrestrial broadcasting service for elderly telecare was 431 JPY (approximately US $3.7). In the analysis of factors that affect WTP, constant factors, log-bid, health consciousness, gender, see others less than one time for week, and willingness to use made positive effect to probability of acceptance. In comparison of WTP in different groups, age groups showed that WTP of the elderly group was higher than WTP of the middle age group and younger age group. However, WTP surveys need to be carefully conducted to minimize the sampling bias and allocate accurate structure of gender distribution.

デジタル放送におけるメタデータ応用 ( メタデータ Part-2〜21世紀のメタデータの利用方法と可能性)

デジタル放送におけるメタデータ応用 ( メタデータ Part-2〜21世紀のメタデータの利用方法と可能性)

Hybrid Fiber Coaxial망에서 VoIP 서비스 구현

최근 모바일기기 및 네트워크에 대한 관심이 높아짐에 따라 기존의 IP (internet protocol) 망을 이용하여 음성데이터를 전송하는 기술인 VoIP (voice over internet protocol)서비스가 급속히 확산됨에 따라 무선 인터넷망을 활용하여 언제 어디서나 저렴한 음성 통화 서비스가 가능해졌다. 그리고 디지털방송서비스가 보급되면서 방송과 통신의 융합을 통해 광대역케이블망을 이용하는 HFC (hybrid fiber coaxial)망 기술은 기존의 통신시스템 및 망설비를 활용하여 양방향 방송서비스 및 인터넷, 전화 등 다양한 신규 서비스를 제공하고 있다. 따라서 실제 HFC 인터넷서비스망에서 음성데이터의 품질보장을 위해 VoCM에 UGS-AD를 MTA에는 RTPS를 적용하면 실제 상용 HFC 인터넷서비스망에서 문제가 되는 협소한 상향대역에서의 음성데이터 전송을 원활히 수행할 수 있음을 확인하였으며, HFC 인터넷서비스 망에서 음성데이터의 QoS개선을 통해 기존 대비 개선된 VoIP서비스를 구현하는 방안을 제시하였다. As interest in mobile devices and networks has increased recently, voice over internet protocol (VoIP) service, which is a technology for transmitting voice data using an existing internet protocol (IP) network, has rapidly spread, Cheap voice call service has become possible. As the digital broadcasting service becomes popular, hybrid fiber coaxial (HFC) network technology, which uses broadband cable network through fusion of broadcasting and communication, utilizes existing communication system and network equipment to provide various new services such as interactive broadcasting service. Therefore, if UGS-AD is applied to VoCM and RTPS is applied to MTA in order to guarantee the quality of voice data in actual HFC Internet service network, it is possible to smoothly perform voice data transmission in narrow upstream band which is a problem in actual commercial HFC network We also proposed a method to improve VoIP service by improving QoS of voice data in HFC Internet service network.

Energy-Efficient and QoE-Aware TV Broadcast in Next-Generation Heterogeneous Networks

Future networks will comprise a large number of inter-connected heterogeneous devices that will receive ubiquitous multimedia services over integrated but diverse wireless network technologies. In this context, optimization of multimedia broadcast transmissions based on network resources and user-end constraints (price sensitivity, device display, and limited battery) is essential to ensure high QoE. This article discusses underlying challenges, and suggests hybrid system architecture and potential cross-layer adaptive unified solutions for energy-efficient and QoE-aware digital television broadcast services in future heterogeneous network environments. Experimental and architecture-level simulation studies of the cross-layer adaptive strategies demonstrate an increase in user equipment energy saving, QoE, and number of multimedia broadcast/multicast users being served.

Consumer Preferences for Digital Cable Broadcasting Service in Korea: A Choice Experiment Study

A digital cable broadcasting service is a multimedia broadcasting service that provides high definition and various supplementary services by using digital transmission. Korea implemented a complete digital broadcasting service by 2012. This study applied a choice experiment to investigate consumer preferences, and it calculated the marginal willingness to pay for this service. Moreover, we employed a multinomial probit model to relax the assumption that all respondents have the same preference for attributes being valued. The results suggest that respondents value channels, definition, video-on-demand (VOD) service, pay-per-view (PPV) service, and commerce based on TV (T-commerce). On the other hand, online gaming may be less important as an attribute for digital cable broadcasting service in Korea.

Survey of digital radio standards and updating for rollout in Brazil

Currently, the spectrum resource is sparse, requiring a system that optimizes use this. An option for radio broadcast is the use of digital radio techniques. These techniques are available standards DAB, DRM, IBOC and have extensive advantage over analog systems, for example, flexibility and audio quality. The choice of the most appropriate digital radio technique is a very important problem, and check of multilateral performances is necessary to countries considering the release of digital radio broadcasting service. In Brazil some tests with digital radio were performed, but no further definition of what standard to use. This paper aims establish some technical comparison of the leading digital radio standards available. Another goal is to present the movements of activities with digital radio in Brazil. Performing some direct comparisons between the patterns, it was observed that DRM is interesting in order to coverage and being open source, while IBOC (HD Radio) is a hybrid system, however proprietary.

T-Commerce 활성화를 위한 소비자 효용 속성 분석

Recently, T-Commerce is emerging to provide new services, with the proliferation of digital broadcasting services. However, T-Commerce market and TV home shopping market are being classified as a legal policy on other markets, such as regulated in the service of live broadcasts. The factor that has inhibited activation T-Commerce related to the lack of appropriate institutions and legal systems in the market, despite the environment with the digital broadcasting service is being spread. We were performed conjoint analysis. For this analysis, we select attributes as a quality attractive factors that significantly affects the satisfaction of TV based shopping customers through previous studies. The results showed that the TV-based shopping customers are important to think 'Responsive', 'Playfulness', 'Live broadcast', 'Convenience' and 'Bidirectional' in the order. The 'Responsive' and 'Live broadcast' of such attributes are served as possible only in TV home shopping, because these attributes don't service due to legal and institutional regulations in T-commerce market. The cluster analysis result also showed that TV shopping consumers are more important to think 'Responsive', 'Playfulness', 'Live broadcast' than 'Convenience' and 'Bidirectional', except one of the classification clusters. If real-time broadcast service is impossible because of the legal and institutional regulations, it seems to require the expansion of the services linked the terrestrial broadcasting to the activating T-Commerce market.

OTT user authentication system by age classification

The number and types of channels and programs that viewers can choose have been explosively increased since the digital broadcasting service was provided to almost every household while the ground wave broadcastings have been stayed. Since sexual, violent, and antisocial contents have been rapidly it increased to competition broadcasting. The primary goal of this study is to develop a system to restrict viewing of adolescents for improper broadcasting linking with the contents DB system inside OTT device. For the purpose an algorithm to detect the age of viewers of OTT broadcasting is proposed.

Quantum signature-masked authentication schemes

In this paper we analyze the security of Zhang's scheme [Chin. Sci. Bull., 2009, 54: 2018–2021], and find that there are two potential loopholes, i.e. the participants forgery attack and impersonation attack. Then, following the elementary method of Zhang's scheme, we propose a quantum signature-masked authentication scheme, which can be widely used many systems, such as the identity authentication between Digital Set-Top-Box (DSTB) and smart card in secure Digital Video Broadcasting (DVB) service system. In our scheme, a semi-trusted center of authentication CA issues the original credential certificates for a user and the final credential certificates is generated by adding her secret information, that is, the user's final credential certificates is generated by her own and CA together. This new scheme can solve Zhang's scheme security problem. Moreover, analysis results show that our scheme can withstand the forgery attack, impersonation attack and inter-resend attack.

An efficient delay-constrained ARQ scheme for MMT packet-based real-time video streaming over IP networks

The MPEG has recently Querydeveloped a new standard, MPEG media transport (MMT), for the next-generation hybrid media delivery service over IP networks considering the emerging convergence of digital broadcast and broadband services. On account of the heterogeneous characteristics of broadcast and broadband networks, MMT provides an efficient delivery timing model to enable inter-network synchronization, measure various kinds of transmission delays and jitters caused by the transmission delay, and re-adjust the timing relationship between the MMT packets to ensure synchronized playback. By exploiting the delivery timing model, it is possible to accurately estimate the round-trip time (RTT) experienced during MMT packet transmission. Based on the measured RTT, we propose an efficient delay-constrained automatic repeat request (ARQ) scheme, which is applicable to MMT packet-based real-time video streaming service over IP networks. In the proposed ARQ scheme, the receiver buffer fullness at the time of packet loss detection is used to compute the arrival deadline, which is the maximum allowed time for completing the requesting and retransmitting of the lost MMT packet. Simulation results demonstrate that the proposed delay-constrained ARQ scheme can not only provide reliable error recovery, but it also achieves significant bandwidth savings by reducing the number of wastefully retransmitted packets that arrive at the receiver side and exceed the allowed arrival deadline.

다중 카메라 기반의 객체중심 맞춤형 영상 미디어 서비스를 위한 메타데이터 관리 시스템 구현

디지털 방송 서비스가 시작되고, 기존의 방송 서버에서 사용자에게 방송 콘텐츠를 제공하는 단 방향 방송이 아닌 통신망을 이용하여 사용자가 방송 서버에 정보를 전달하는 양 방향 방송서비스가 가능해졌다. 이에 사용자는 개인이 원하는 장면을 원하는 시간대에 시청하는 맞춤형 방송 서비스에 대한 요구가 생겨나게 되었다. 이러한 맞춤형 방송 서비스에서는 사용자가 입력한 데이터를 바탕으로 검색하기 위한 메타데이터 정보가 중요하다. 본 연구는 기존의 사용자가 원하는 장면별로 시청하는 맞춤형 방송 서비스에서 원하는 장면 뿐 만 아니라 사용자가 보고 싶은 객체를 원하는 카메라 시점에서 시청할 수 있는 객체 중심의 맞춤형 영상미디어 서비스를 위한 메타데이터에 관리 모듈에 대한 연구이다. 본 연구를 통하여 기존의 맞춤형 방송 서비스에 없었던 객체에 대한 세그먼트 정보를 제공해 줌으로써 사용자에게 시청의 폭을 넓혀 시청 만족도를 높일 수 있다. Since digital broadcasting service has been begun, user's requirements have been increased for personalized broadcasting system that users can watch the part of programs which they want to watch in anytime. In personalized broadcasting system, metadata is important for searching program information based on user's input data. In this paper, an object-oriented media service metadata management module is implemented. Metadata used in this system is described by extending TV-Anytime specifications which is the International standard for personalized media service. For this, extended segments information is provided including object information which do not existing in previous personalized broadcasting standard. This system can provide better satisfaction to users by using object segmentation information.

A new performance metric for M-APSK receivers

Synchronization is a critical function that determines the overall performance and complexity of the receiver of any communications system. The implementation and evaluation of effective synchronization algorithms still comprises a challenging task that requires accurate testing methods, which are based on measurements collected at various processing stages. M-ary Amplitude-Phase Shift Keying (M-APSK) constellations are used in modern communications systems, such as digital video broadcasting and interactive broadband satellite services, due to their bandwidth efficiency characteristics. This paper presents a new metric that can be associated with the signal quality at various synchronization mechanisms used in M-APSK receivers. Apart from the metric's mathematical derivation, the paper presents various experimental results based on single (QPSK, 8PSK), two (16APSK) and three (32APSK) ring M-APSK schemes employed in DVB-S2 systems.

DVB-NGH: The Next Generation of Digital Broadcast Services to Handheld Devices

This paper reviews the main technical solutions adopted by the next-generation mobile broadcasting standard DVB-NGH, the handheld evolution of the second-generation digital terrestrial TV standard DVB-T2. The main new technical elements introduced with respect to DVB-T2 are: layered video coding with multiple physical layer pipes, time-frequency slicing, full support of an IP transport layer with a dedicated protocol stack, header compression mechanisms for both IP and MPEG-2 TS packets, new low-density parity check coding rates for the data path (down to 1/5), nonuniform constellations for 64 Quadrature Amplitude Modulation (QAM) and 256QAM, 4-D rotated constellations for Quadrature Phase Shift Keying (QPSK), improved time interleaving in terms of zapping time, end-to-end latency and memory consumption, improved physical layer signaling in terms of robustness, capacity and overhead, a novel distributed multiple input-single output transmit diversity scheme for single-frequency networks (SFNs), and efficient provisioning of local content in SFNs. All these technological solutions, together with the high performance of DVB-T2, make DVB-NGH a real next-generation mobile multimedia broadcasting technology. In fact, DVB-NGH can be regarded the first third-generation broadcasting system because it allows for the possibility of using multiple input-multiple output antenna schemes to overcome the Shannon limit of single antenna wireless communications. Furthermore, DVB-NGH also allows the deployment of an optional satellite component forming a hybrid terrestrial-satellite network topology to improve the coverage in rural areas where the installation of terrestrial networks could be uneconomical.

South Africa Goes Digital: Possible Obstacles to the Adoption of Digital Television

This study examined possible obstacles to the adoption of digital television in South Africa. A qualitative approach was followed by conducting in-depth interviews with key informants. The data was analysed using open coding, where dominant themes from the discussions were identified and discussed in detail. The findings show that there are a few challenges in migrating from analogue to digital television in South Africa. However, it is important to note that the challenges indicated are key to the success of broadcasting digital migration. South Africans will need set top boxes which convert the analogue signal into a digital signal. The study established that government will subsidise economically challenged TV-owning households to gain access to set top boxes for digital signal reception and access to digital broadcasting services. It is true that for the digital migration process in South Africa to be successful, it is necessary to have a clear government policy and implementation plan. It is also critical that all the relevant stakeholders cooperate in working together with government. DOI: 10.5901/mjss.2014.v5n1p89