Disk drive system for storing a plurality of I frames non-interl

Details Disk drive system for storing a plurality of I frames non-interl Disk drive system for storing a plurality of I frames non-interl

1995-08-03

1998-11-24

Lee, Thomas C.

395888, 395856, 395438, G06F 1310, H04N 576

Patent

active

058420460

ABSTRACT:
A storage system for reading and storing I and B compressed video frames while improving fast video data reproduction. The system includes a storage disk, a read/write head, and a controller for positioning the I and B frames on the disk. The I frames may be stored on a first cylinder while the B frames are stored on a second cylinder. Alternately, the I frames may be stored on a plurality of cylinders. Thus, in the high-speed video reproduction mode, the controller can move the head to sequentially read I frames in the order which the I frames were stored on the plurality of cylinders. Further, the controller may move the head to sequentially read I frames stored on only one of the plurality of cylinders. In the normal video reproduction mode, a first I frame is read, followed by a B frame associated with the first I frame before proceeding to subsequent I frames. A buffer temporarily stores data read from the storage device. The buffer has a capacity equal to or greater than the capacity of two cylinders to ensure that normal video reproduction is not slower than that which is performed conventionally.

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