Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
1998-08-14
2001-05-08
Black, Thomas (Department: 2771)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C707S793000, C725S050000
Reexamination Certificate
active
06230163
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a datastream-processing buffer memory organization, U.S. Pat. Nos. 4,314,361, 4,236,225, and 4,222,102 respectively describe FIFO(first in first out) organizations with fixed input and variable output, with variable input and fixed output, and with both variable input and variable output. For effecting such elementary FIFO functionality the references use exclusively hardware-based housekeeping.
SUMMARY OF THE INVENTION
The present inventor has experienced a need for an enhanced and more flexible functionality, in particular to allow more complicated processing modes. Moreover, moving of information from one physical location to another should be kept as restricted as possible, in view of limited transfer capability viz à viz ever larger datastream volumes, so that no undue delays will be incurred. This applies even more when the same data items are used several times for respective functions. A final argument against physical movements is that power consumption for physical data transport should be kept low.
In consequence, amongst other things, it is an object of the present invention to allow the mapping of various logical buffers on shared physical memory space, whilst dimishing physical data transfer to an extremely low amount.
Advantageously, the memory management is arranged for multilevel housekeeping. The definition of the data format often has specified various successive levels. Through assigning the housekeeping with respect to a particular format level to an associated housekeeping level, flexibility is attained in an easy manner. Further advantageous aspects of the invention will be disclosed or become obvious to those skilled in the art by studying the detailed description below with reference to the following drawings which illustrate the elements of the appended claims of the inventions.
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IEEE publication, “An MPEG-2 digital decoder design: A pratical approach with emphasis on elementary stream data flows” by Greg Reid, pp. 37-42, Sep. 1997.*
M. Yasuda et al, “MPEG2 Video Decoder and AC-3 Audio Decoder LSIs for DVD Player”, IEEE Trans. on Consumer Electronics, vol. 43, No. 3, Aug. 1997, pp 452-468.
Kien A. Hua et al, “Earthworm: A Network Memory Management Technique for Large-Scale Distributed Multimedia Applications”, IEEE Computer and Communications Societies, vol. 43, Aug. 1997, pp 990-997.
Belk Michael E.
Black Thomas
Mizrahi Diane
U.S. Philips Corporation
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