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Cho I.,KBS Korean Broadcasting System | Kim B.,KBS Korean Broadcasting System | Hahm S.,KBS Korean Broadcasting System | Kim S.,KBS Korean Broadcasting System | Jeon S.,KBS Korean Broadcasting System
ABU Technical Review | Year: 2015

KBS (Korean Broadcasting System) has carried out 4K terrestrial live broadcasting of three big sports .events in 2014, the KBL (Korean Basketball League) finals, the 2014 FIFA World Cup, and the 2014 Incheon Asian Games. 4K UHD live coverage of the KBL finals was the world's first terrestrial 4K live broadcasting. This article covers from on-location live production of sports events, SFN (Single Frequency Network) transmission, as well as experimental IP transmission of uncompressed 4K video via KREONET, a national R&D network run by KISTI (Korea Institute of Science and Technology Information).

Kim Y.,KBS Korean Broadcasting System | Han S.,KBS Korean Broadcasting System | Choi S.,KBS Korean Broadcasting System | Jung B.,KBS Korean Broadcasting System
ABU Technical Review | Year: 2015

There have been complaints about the time delay between closed captions and dialogue on TV occurring due to live stenography. The problem can be solved if captions are generated beforehand, but it is practically impossible to enforce pre-production for all broadcast programmes. To cope with it, we propose a new filebased closed captioning system based on speech recognition and audio-fingerprinting. The system aims at rerun episodes?episodes with pre-prepared caption files produced by live stenography at the first-run, thereby containing delayed captions. To match the delayed captions with the dialogue, the system adjusts timelines of the captions based on automatic speech recognition. When it comes to rebroadcasting, since there would be video editing in the rerun episodes, the system finds differences between the rerun and the first-run by comparing their audiofingerprints and generates new closed caption files. The proposed system has been implemented and applied in KBS (Korean Broadcasting System).

Kim Y.,KBS Korean Broadcasting System | Lee D.,KBS Korean Broadcasting System | Park S.,KBS Korean Broadcasting System
ABU Technical Review | Year: 2011

Recently, as an alternative to watching TV programmes at a scheduled time, it has become possible, owing to advances in IP-based networking infrastructure, for viewers to download and watch TV programmes they have missed. It is expected that watching any TV programme at any time will be the primary function supported by the Smart TV, which has got a lot of attention since the advent of Smart Phone. Because OHTV (Open Hybrid TV) can provide on-demand content services by integrating terrestrial digital TV networks and the Internet without forcing viewers to subscribe broadcasting services (IPTV, Cable TV, etc.), it is a suitable candidate for Smart TV on digital terrestrial TV networks.

Kim B.,KBS Korean Broadcasting System | Hahm S.,KBS Korean Broadcasting System | Cho I.,KBS Korean Broadcasting System | Kang J.,KBS Korean Broadcasting System | And 3 more authors.
ABU Technical Review | Year: 2010

In recent years, 3D films have been the focus of public attention in Korea. 'Avatar' drew over 10 million people and 'Alice in Wonderland', 'Clash of the Titans' and 'How to Train your Dragon' followed. Nowadays 3DTV service is a hot issue, and the number of 3DTV sales is growing every day following KBS' 3DTV first trial run in May 2010. KBS has broadcast two 3DTV trial runs, commencing in May and October, with different service implementation methods, to verify the need for and validity of a 3DTV service and to collect opinions about the 3DTV experience. In this paper, we show 2 types of 3DTV service implementation; the frame compatible 3DTV service and the service compatible 3DTV service. The Frame Compatible 3DTV service method, which can be compatible with legacy DTV broadcasting equipment and systems, was adopted for the '2010 Colourful Daegu Pre-Championship Meeting' and the 'World Cup 2010' broadcast from May to July 2010. One of the major advantages of this service method is that we can use existing DTV systems and handle 3D videos easily because both left and right images are converted to a side-by-side image format. However it has the disadvantage of conventional DTV receivers' being unable to display side-by-side 3D content. A Service Compatible 3DTV service transmitting full HD 3DTV dual streams was launched in October 2010 to show a high-quality 3DTV service at the G20 summit meeting. This method cannot use legacy DTV broadcasting facilities and requires new dual-stream compatible 3D equipment and newly developed 3DTV receivers that can decode dual-stream 3DTV video. This involves the broadcasters in extra cost. In this experimental broadcast, we expect to verify the validity and practicality of 3DTV services and also hope to give viewers a much more realistic TV experience.

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