In this paper a new method for the autostereoscopic display, named the Dual Layer Parallax Barrier (DLPB) method, is
introduced to overcome the limitation of the fixed viewing zone. Compared with the conventional parallax barrier
methods, the proposed DLPB method uses moving parallax barriers to make the stereoscopic view changed according to
the movement of viewer. In addition it provides seamless stereoscopic views without abrupt change of 3D depth feeling
at any eye position. We implement a prototype of the DLPB system which consists of a switchable dual-layered Twisted
Nematic Liquid Crystal Display (TN-LCD) and a head-tracker. The head tracker employs a video camera for capturing
images, and is used to calculate the angle between the eye gazing direction and the projected direction onto the display
plane. According to the head-tracker's control signal, the dual-layered TN-LCD is able to alternate the direction of
viewing zone adaptively by a solid-state analog switch. The experimental results demonstrate that the proposed
autostereoscopic display maintains seamless 3D views even when a viewer's head is moving. Moreover, its extended use
towards mobile devices such as portable multimedia player (PMP), smartphone, and cellular phone is discussed as well.
In this paper, we present a development of 3D-T DMB (three-dimensional digital multimedia broadcasting) receiver for
providing 3D video and data service. First, for a 3D video service, the developed receiver is capable of decoding and
playing 3D AV contents that is encoded by simulcast encoding method and that is transmitted via T-DMB network.
Second, the developed receiver can render stereoscopic multimedia objects delivered using MPEG-4 BIFS technology
that is also employed in T-DMB. Specially, this paper introduces hardware and software architecture and its
implementation of 3D T-DMB receiver. The developed 3D T-DMB receiver has capabilities of generating stereoscopic
viewing on the glasses-free 3D mobile display, therefore we propose parameters for designing the 3D display, together
with evaluating the viewing angle and distance through both computer simulation and actual measurement. Finally, the
availability of 3D video and data service is verified using the experimental system including the implemented receiver
and a variety of service examples.
We present a 3-D mobile broadcasting system based on a depth-image-based rendering (DIBR) technique in terrestrial digital multimedia broadcasting (T-DMB). It is well known that a 3-D mobile broadcasting service based on the DIBR technique can be one of the solutions to meet service requirements, because the required bit rates of depth images in DIBR schemes are less than additional video bit rates of other 3-D formats, while keeping good 3-D quality and guaranteeing backward compatibility with conventional broadcasting systems. We propose an implementation of a DIBR-based 3-D T-DMB system that supports real-time rendering with good image quality and realistic depth effect at the receiver, verifying that it could be perfectly applicable in mobile broadcasting. Specifically, the proposed 3-D T-DMB receiver adopts a look-up table (LUT)-based simultaneous method to accomplish the real-time implementation of DIBR algorithms, including warping, hole filling, and interleaving. Moreover, we establish the parameter values that are needed for generating the LUT based on theoretical analysis. The verification is accomplished through objective and subjective evaluations, based on simulation and real-time implementation of the system under actual service conditions.
The mobile broadcasting services getting deployed around the world are being evolved to new services. One of the
notable services is mobile stereoscopic service, called 3D, which can provide users with a stereoscopic view of TV
contents while on the move. This paper presents the design and the implementation of 3D DMB receiver enabling the
reception of mobile 3DTV and BIFS based interactive data services. Main concepts of 3D DMB receiver are the nonglasses
viewing experience, backward and forward compatibility and high transmission efficiency. We demonstrate the
main concepts and features of our 3D DMB receiver and outline the implementation result along with the future works.
This paper presents a 3D (three dimensional) mobile broadcasting service based on depth-image-based rendering (DIBR)
technique in terrestrial digital multimedia broadcasting (T-DMB). In designing and developing a 3D visual service based
on mobile broadcasting system, we must consider system requirements such as the minimization of additional bit-rates
for 3D depth information due to the limitation of transmission channel bandwidth, the assurance of backward
compatibility with existing T-DMB, and the maximization of 3D effect while reducing eye fatigue. Therefore, the 3D
mobile broadcasting service based on DIBR technique can be one of the solutions to meet such requirements because the
allocated bit-rates of depth image with DIBR scheme is less than additional video bit-rates of another 3D format, while
keeping 3D quality and guaranteeing backward-compatibility with T-DMB. In this paper, we introduce an
implementation of DIBR-based 3D T-DMB system that supports the real-time rendering with good image quality and
depth effect at the receiver, verifying that it could be available in the mobile broadcasting. The verification is achieved
through objective and subjective evaluation, based on the simulation and implementation of the system. Finally, we will
confirm that DIBR-based 3D mobile broadcasting service would be commercialized in near future.
In this paper, we present motivation, system concept, and implementation details of stereoscopic 3D visual services on
T-DMB. We have developed two types of 3D visual service : one is '3D video service', which provides 3D depth feeling
for a video program by sending left and right view video streams, and the other is '3D data service', which provides
presentation of 3D objects overlaid on top of 2D video program. We have developed several highly efficient and
sophisticated transmission schemes for the delivery of 3D visual data in order to meet the system requirements such as
(1) minimization of bitrate overhead to comply with the strict constraint of T-DMB channel bandwidth; (2) backward
and forward compatibility with existing T-DMB; (3) maximize the eye-catching effect of 3D visual representation while
reducing eye fatigue. We found that, in contrast to conventional way of providing a stereo version of a program as a
whole, the proposed scheme can lead to variety of efficient and effective 3D visual services which can be adapted to
many business models.