Guo-Zua Wu

High-Performance Sub-Picture Compression Algorithm Used in High-Definition Video Discs

This study presents a new sub-picture compression algorithm with high coding efficiency. The proposed algorithm uses content-adaptive run-length coding technology to enhance the coding efficiency. Four run-length compression rules with content-adaptive lengths are used to compress the binary bit stream of each bit plane. A revertible lossless transform is used as the optional encoding process for preprocessing the content to fit the content feature with more 1 than 0. The experimental results show that the proposed algorithm has much better performance than the current DVD sub-picture compression method

New optical storage formats developed in Taiwan

Two new optical storage formats, forward versatile disk (FVD) and blue high-definition digital versatile disk (HD-DVD), developed in Taiwan, are introduced. Some major technologies, including new modulation code and multilayer technology, are adopted in these formats to differentiate from current optical disc formats. For the further HD storage, several advanced technologies have been developed.

New Optical Storage Format and Technologies Developed in Taiwan

The new optical disk format, called forward versatile disk (FVD), has been developed in Taiwan. Some physical technologies, such as recording on narrower groove, new modulation code, and new error correction code (ECC) have been verified. The feasibility for producing triple-layer FVD has been proven. In addition to the read-only memory (ROM) type, the format for the recordable/rewritable FVD type is also developed. These technologies of FVD with red laser will be applied to the next generation. Blue high-definition (HD) FVD will adopt most red HD FVD technologies. For higher recording capacity FVD, technologies such as super-RENS and multilevel recording for next-generation FVD are continuing to develop

Near-Field Recording Head with Simple Tracking Design

A two-zone solid-immersion lens is proposed for use in near-field recording. Two spots are generated. One illuminates the lower flat plane of the disk for reading/writing and the other illuminates the upper pregrooved plane of the disk for push-pull tracking.