Carriage of 3D Audio-Visual Services by T-DMB

Abstract

In this paper, we introduce our experience on the development of a three-dimensional audio-visual(3D AV) service system based on the terrestrial digital multimedia broadcasting (T-DMB) system. 3D AV service is now much more feasible than before with the fast advancement of hardware technologies, especially 3D flat panel display, processors and memory. 3D AV service over DMB system is very attractive due to the facts that (1) glassless 3D viewing with small display is relatively easy to implement and more suitable to the single user environment like DMB, (2) DMB is a new media and thus has more flexibility in adding new services on the existing ones, (3) 3D AV handling capability of 3D DMB terminal has lots of potential to generate new types of services if it is added with other components like built-in stereo camera. In order to provide successful 3D DMB services over existing DMB system, we need to solve several issues like (1) guaranteeing backward compatibility with the T-DMB system, (2) minimizing the overhead on the transmitted bit-rate and the required processing power of the terminal, (3) providing good 3D depth perception without a noticeable eye strain. We propose a very efficient and backward compatible system architecture for the 3D DMB, and show how we can get better depth perception with the limited bit budget of the DMB system.

Depth-image-based rendering for 3DTV service over T-DMB

“…At this time, two object-descriptors (OD) are used to describe video/audio objects. Especially, two ESs, which correspond to 2D video and depth, are described in an OD, as in [2]. We also assign 0xC0 indicating 'user private' to objectTypeIndication of the depth stream in DecoderConfigDescriptor so that the receiver can discriminate 2D video stream and the depth stream.…”

“…Particulary, T-DMB focuses on the broadcasting of moving pictures and their reception in harsh conditions, such as in places surrounded by high buildings and on highways where vehicles are moving at a very high speed. Owing to the development of high-quality autostereoscopic display devices, which do not require the viewer to wear special glasses in order to perceive the depth, 3DTV service over T-DMB has been introduced successfully [2]. 3DTV service over T-DMB has the following advantages.…”

“…However, there is still room for technical improvement to efficiently implement the advantages of 3DTV service over T-DMB. Currently, 3DTV service over T-DMB is based on an end-to-end stereoscopic video chain [2], in which two separate video streams, one for the left eye and one for the right eye, are captured, transmitted and displayed [17]. In this architecture, however, stereo capturing has to fit to the display geometry and vice versa [6].…”

Three-Dimensional Media for Mobile Devices

“…Currently, there are a number of projects conducting research on transmitting 3-D video over such existing infrastructures such as the Korean 3-D T-DMB [80], the European 3-D Phone [81], Mobile3DTV [82] addressing the delivery of 3DTV to mobile users over DVB-H system, and DIOMEDES [83] addressing 3-D P2P distribution and broadcasting systems. Recently, DVB has also established 3DTV group (CM-3DTV) to identify Bwhat kind of 3DTV solution does the market want and need, and how can DVB play an active part in the creation of that solution [ [87].…”

Early disparity estimation skipping for multi-view video coding

“…A 3DTV system contains not only stereoscopic video, but also a multi-directional 3D scene by multi-view. 3D DMB is a broadcasting system which offers 3D video to users in mobile circumstances [4]. Because the system can present more realistic video and information than conventional DMB, it is expected to be widely used in e-commerce and news media.…”