Apparatus for processing digital data

Details Apparatus for processing digital data Apparatus for processing digital data

1987-09-03

1989-01-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

371 38, G11B 509

Patent

active

047991135

ABSTRACT:
An apparatus for processing digital data, for example, as reproduced by a digital video tape recorder, includes a first memory in which words or blocks of reproduced digital data are written in accordance with respective write addresses and from which the words of written data are read out in response to read addresses selected for de-shuffling or de-interleaving of the reproduced data, and a second memory storing, at addresses corresponding to the write addresses at which the words of digital data are written in the first memory, data, such as error flags, indicating the state of such words of digital data. When the words of digital data are read out of the first memory, the data indicating the states thereof are read out from corresonding addresses of the second memory and, in response to the condition thereof, for example, an indication that the associated words of reproduced digital data has been read out of the first memory a predetermined multiple number of times, there is substituted for such word a predetermined pattern of digital data. As a result, in a shuttle mode of the digital video tape recorder, that is, in a reproducing operation with a variable type speed, the display of a moving image is considerably improved.

REFERENCES:
patent: 4742519 (1988-05-01), Abe et al.

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