KEYWORDS: Video, Receivers, 3D video streaming, 3D image processing, 3D displays, Computer programming, Prototyping, 3D image enhancement, Antennas, Multiplexers
This paper presents 8-VSB & M/H hybrid 3DTV system for ATSC terrestrial 3DTV broadcasting services. The system
transmits MPEG-2 encoded left images through HD main channel (8-VSB) and H.264 encoded right images through
mobile channel (M/H) simultaneously. Basically hybrid 3DTV support stereoscopic 3D HD services composed of mixed
quality left/right images for 3D image rendering. For more comfortable 3D service and human factors under hybrid
3DTV service environment, we also propose new video quality enhancement technologies with small amount of
disparity map information. In this paper, we propose 8-VSB & M/H hybrid 3DTV system which enables stereoscopic 3D
HD, 2D HD fixed and 2D mobile broadcasting concurrently within 6MHz bandwidth, and the proposed system will
provide maximum channel flexibility and extended service functionalities as well as fully backward compatibility with
legacy 2D receivers.
We propose a very simple scalable video coding (SVC) system based on the H.264 baseline profile codec. The proposed SVC algorithm can offer three levels of the temporal and spatial scalability - QVGA@15fps, QVGA@30fps, and VGA@30fps. The proposed system achieves the temporal scalability by encoding every other picture as the non-reference P-picture, so that the base layer codec dealing with the QVGA@15fps sequence is fully-compatible with the satellite-digital multimedia broadcasting (S-DMB) system in Korea. In addition, the same decoder can reconstruct the QVGA@30fps sequence when it receives the bits representing the non-reference pictures. For the spatial enhancement layer, the encoder follows the standard H.264 baseline profile except the inter-layer intra prediction. To reduce the computational burden of the encoder, the enhancement layer encoder may skip the motion estimation procedure by interpolating the motion field with that of the base layer. Simulation results show that the proposed system yields less then about 12% of loss in the reconstruction picture quality compared with the anchor H.264 JM encoder. The proposed SVC system still has a room for improvement of coding efficiency by trading with the computational complexity, so that lots of further works are required.
The manipulation of magnetic anisotropy in a Co/Pt nano- multilayer(nano-ML) system with particles being embedded is reported. The samples, fabricated by a newly-developed normal incidence pulsed laser deposition (NIPLD) method, have salient magnetic properties, different from particle- free samples of almost the same structure: (1) they exhibit bi-axial magnetic anisotropies and (2) there exists a critical field at which the change in easy direction from a parallel direction to a perpendicular direction and vice versa. The careful manipulation of particles and nano- layers has also allowed us to control the degree of magnetic anisotropy by embedding particles in a well-defined nano- multilayer system: uni-axial anisotropy to bi-axial one and vice versa. This work indeed clearly shows that the integration of nano-building blocks into nano-structures can tailor properties of nano-materials.
In order to provide a high quality of the reconstructed images with a reduced transmission bit rate, taking into account both statistical redundancy and perceptual characteristics of the DCT coefficients, we apply perceptual windowing and sequential vector quantization to encoding of the coefficients: first, the coefficients are decomposed into 16 slightly overlapping subvectors so as that each subvector has reasonable dimension and conveys key information about one directional image, and then the decomposed subvectors are quantized in a sequential manner. The proposed scheme is good at encoding images with a wide range of transmission bit rates which can be easily controlled by adjusting only the stopping criterion of the sequential vector quantizer.
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