Title :
Multirate, two-dimensional channel coding for optical page memories
Author_Institution :
Telecommun. Res. Center, Arizona State Univ., Tempe, AZ, USA
fDate :
6/22/1905 12:00:00 AM
Abstract :
Digital holographic data storage (DHDS) shows promise for next-generation, highly-parallel, random-access, multidimensional data and image storage. Distortion and noise promote detection errors in DHDS systems. Trellis-coded modulation (TCM) combines modulation and error-correction coding to reduce the bit error rate. This paper describes a method of using position-dependent modulation codes with the author´s Split TCM architecture for practical TCM in these page memories. Modulation coding with position dependence is shown to provide better resistance to symbol detection errors in high-distortion regions. The architecture provides relative computational efficiency, facilitating high-throughput page access
Keywords :
channel coding; holographic storage; paged storage; random-access storage; trellis coded modulation; BER reduction; Split TCM architecture; bit error rate; computational efficiency; detection errors; digital holographic data storage; distortion; error-correction coding; high-distortion regions; high-throughput page access; modulation coding; multidimensional data storage; multidimensional image storage; multirate 2D channel coding; noise; optical page memories; parallel random-access storage; position dependence; position-dependent modulation codes; symbol detection errors resistance; trellis-coded modulation; Channel coding; Computer architecture; Holographic optical components; Holography; Image storage; Memory; Modulation coding; Optical distortion; Optical modulation; Optical noise;
Conference_Titel :
Image Processing, 2000. Proceedings. 2000 International Conference on
Print_ISBN :
0-7803-6297-7
DOI :
10.1109/ICIP.2000.901069
