A novel design of physical format coding system (PFCS) is presented based on Multi-level read-only memory disc (ML
ROM) in order to solve the problem of low efficiency and long period of disc testing during system development. The
PFCS is composed of four units, which are 'Encode', 'Add Noise', 'Decode', 'Error Rate', and 'Information'. It is
developed with MFC under the environment of VC++ 6.0, and capable to visually simulate the procedure of data
processing for ML ROM. This system can also be used for developing other optical disc storage system or similar
channel coding system.
This article introduces DVD Download specification and Manufacturing On Demand (MOD) system firstly. Then it will
show a designed MOD system and analyze the function of each part in it. In this system, we need to combine two DVD's
files into one disc automatically, so in the last part, the article shows work on this problem and achievement up to now.
Disc scratches, dusts and noise corruption et al. will cause data sequence errors including random errors and burst errors.
With the recording density of multilevel (ML) optical storage system increasing, the same length of scratches on the
surface of optical disc will bring more burst errors in ML DVD than conventional optical recording systems, e.g., digital
versatile disc (DVD) and compact disc (CD). A new interleaving scheme based on Reed-Solomon code (RS) is proposed
to solve this problem. In DVD system, the burden of the Parity of Outer-code (PO) is huge, while the Parity of Innercode
(PI) has more correcting ability than needed. The new interleaving algorithm adjusts the structure of data frame and
block and improves the interleaving depth of ECC block to reduce the burden of PO. The results of numerical
simulations are presented to verify the performance of the new interleaving algorithm compared with RSPC. The new
proposed scheme can correct maximum burst error length of the proposed code is 6912 bytes. Burst error correcting
capacity of the proposed scheme is improved up to137.4% more than that of the RSPC.