Device for controlling memory in digital video disk reproducing

Details Device for controlling memory in digital video disk reproducing Device for controlling memory in digital video disk reproducing

1997-06-19

1999-10-19

Garber, Wendy

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 46, 348716, 348718, 369 60, 711173, H04N 5781, H04N 585, H04N 590, H04N 591

Patent

active

059702087

ABSTRACT:
A digital video disk reproducing device utilizes a single memory both for error correction and for data buffering. The device designates a unit number to each sector of the memory and determines first, second and third regions. The first region corresponds to an absolute value of a unit number obtained by subtracting a unit number Y of a sector where a data read/write operation is completed during the descrambling from a unit number X of a start sector in an error correction block where the error correction is completed. The second region corresponds to an absolute value of a unit number obtained by subtracting a unit number Z of a sector where the data is completely transferred to the audio/video decoders or the ROM decoder from the unit number Y. The third region corresponds to an absolute value of a unit number obtained by subtracting the unit number Z from a unit number W of a sector where a writing operation of demodulated data is completed. Thereafter, the devices controls a W-pointer and a Z-pointer not to overfill a Z-pointer and a Y-pointer respectively, and controls an X-pointer and the Y-pointer not to pass ahead of the W-pointer and the X-pointer, respectively.

REFERENCES:
patent: 5148417 (1992-09-01), Wong et al.
patent: 5237460 (1993-08-01), Miller et al.
patent: 5432769 (1995-07-01), Honjo

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