Yoshiyuki Ishizawa

DCT-based still image compression ICs with bit-rate control

The authors discuss compression and coding ICs for still images based on the DCT (discrete cosine transform) using a new algorithm for bit-rate control. The compression and coding method used in these ICs conforms to the JPEG (Joint Photographic Expert Group) standard. These ICs have been developed for a digital still camera system using memory cards as the recording medium, and they have a bit-rate control function to guarantee the number of images recorded on a card. The functional specifications and composition of these ICs, as well as the structure of the encoder IC, and details of the algorithm used for bit-rate control are considered. >

A new front-end signal-processing LSI for HD DVD

This work presents a front-end LSI using 0.13 /spl mu/m-process developed for HD DVD disc drives. HD DVD is a recently proposed format for optical discs, in which a blue laser is adopted and high-density recording of over 15 GB per side is achieved. The LSI chip consists of 3 subsystems: partial response maximum likelihood (PRML) read channel subsystem, servo control subsystem and memory control subsystem. Using this LSI, we have also developed a HD DVD player and verified the performance to be sufficient for high-definition movies or other content. The ability to play back high-definition quality movies proves the basic potential of this LSI.