Enumerative Encoding of TMTR Codes for Optical Recording Channel

Enumerative Encoding of TMTR Codes for Optical Recording Channel

We propose a new time-varying maximum transition run (TMTR) code for DVD recording systems, which has a rate 8/11 higher than the EFMPlus code and a lower power spectral density (PSD) at low frequencies. An enumeration method for constructing the new TMTR code is presented. Computer simulations indicate that the proposed TMTR code outperforms the EFMPlus code in error performance when applied t...

TMTR Codes for Partial Response Channels

A TMTR code is specified as (keven 1 = 2, k odd 1 = 3, k) constraint. In this work, an approach for constructing (keven 1 = 2, k odd 1 = 3, k) codes is presented. Based on this construction, a rate 8/9 code with k=7 is found. This code can achieve better timing recovery performance compared to the proposed previously TMTR code with k=11. An enumerating encoder and decoder exist for constructed ...

A survey of codes for optical disk recording

We report on 20 years of development of codes for optical disk recording systems. A description of the state-of-the-art and feasible options for future extensions and improvements are given.

Capacity-Approaching Codes for the Magnetic Recording Channel

Digital signal processing and coding are increasingly being recognized as a cost-efficient approach in achieving substantial areal density gains while preserving the high reliability of disk drives, although historically advances in head and media technologies have been the main driving force behind areal density growth. The recent advances in capacity-approaching codes hold the promise to push...

Extremely efficient DC-free RLL codes for optical recording