Apparatus for de-rotating and de-interleaving data including plu

Details Apparatus for de-rotating and de-interleaving data including plu Apparatus for de-rotating and de-interleaving data including plu

1996-07-26

1999-08-17

Gossage, Glenn

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

711220, 341 81, 348426, 348390, 375340, G06F 1200, H04N 7015

Patent

active

059408634

ABSTRACT:
An apparatus for re-rotating and deinterleaving data includes (i) a first memory for storing D elements of rotated and interleaved data in D storage locations, (ii) a first addresser for addressing the first memory in order to read de-rotated and interleaved data out of the D storage locations and to write rotated and interleaved data into the D storage locations, (iii) a second memory for storing mD elements of the de-rotated and interleaved data read out of the first memory, wherein the de-rotated and interleaved data read out of the first memory are stored in mD storage locations of the second memory, and (iv) a second addresser for addressing the second memory in order to read de-rotated and de-interleaved data out of the mD storage locations and to write de-rotated and interleaved data from the first memory into the mD storage locations. The first addresser may include an address counter, an offset generator, and a modulo adder. The second addresser may include a counter, a seed generator, and a modulo converter.

REFERENCES:
patent: 5369652 (1994-11-01), Bailey et al.
patent: 5537420 (1996-07-01), Huang
ATSC Digital Television Standard, Annex D, Sep. 16, 1995, Sections 4.1-4.2.5, pp. 48-56.

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