Bank pointer comparator and address generator for a DVD-ROM syst

Details Bank pointer comparator and address generator for a DVD-ROM syst Bank pointer comparator and address generator for a DVD-ROM syst

1998-07-21

2000-10-03

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Addressing combined with specific memory configuration or...

For multiple memory modules

G06F 1200

Patent

active

061286931

ABSTRACT:
An data processing apparatus for a digital versatile disk ROM system includes an EFM demodulator, an error-correction decoder, and a data transfer unit, each of which is interfaced with an external memory partitioned into first, second, and third banks for storing demodulated data, error-corrected data and transfer data. A bank pointer comparator generates first, second, and third bank pointers, compares the bank pointers with each other, and activates or deactivates predetermined enable signals in accordance with comparison result. The bank pointers represent the bank of external memory in which EFM-demodulated data is written, the bank in which error-corrected data is stored, and the bank from which transfer data is read, respectively. Each bank pointer is incremented when an operation associated with the bank pointer is completed rather than the conventional technique of increasing the bank pointer whenever an ECC block sync signal is input. Thus, the data processor ensures that data is written, error-corrected, and read without loss, thereby increasing system data rate.

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patent: 5557766 (1996-09-01), Takiguichi et al.
patent: 5737572 (1998-04-01), Nunziata
patent: 5751988 (1998-05-01), Fujimura
patent: 5848258 (1998-12-01), Fenwick et al.
patent: 6003111 (1999-12-01), Holman et al.
patent: 6026464 (2000-02-01), Cohen

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