Real time data compression apparatus for a data recorder

Details Real time data compression apparatus for a data recorder Real time data compression apparatus for a data recorder

2005-08-18

2009-11-24

Tran, Thai (Department: 2621)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000

Reexamination Certificate

active

07623767

ABSTRACT:
A real time data compression apparatus examines whether a present read-in data point is in a predetermined tolerable error range. If yes, the previous data point is deemed as redundant and is ignored and after which a new data point is read in for comparing again. When a predetermined amount of data points is continuously ignored, it means the data is steady and only the final data point of these ignored ones is recorded. Otherwise, when data is varied greatly during a period, only the total amount of these varying data points and their value are recorded so the memory capacity for storing the compressed data is saved. Furthermore, the compressed data is stored in a form of a data structure in which the compressed data are expressed by multiple blocks. The block form allows increase of the efficiency of the searching process of the compressed data.

REFERENCES:
patent: 5235126 (1993-08-01), Bruti et al.
patent: 6169846 (2001-01-01), Ohishi
patent: 2002/0168178 (2002-11-01), Rodriguez et al.

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