Seagate Technology Incorporated

Maxtor Corporation

Gaetano Bonfiglio

Trung T Nguyen

An H Nguyen

Trung Thuc Nguyen

Yin Lung Shih

Kurusamy Muniappan

Video data in an encoded frame is reduced by adjusting orthogonal transform coefficients in the encoded frame during trick play operation such as fast forward or fast reverse. The orthogonal transform coefficients are adjusted by selecting essential orthogonal transform coefficients with high energy and non-essential orthogonal transform coefficients with low energy, maintaining or strengthening the essential orthogonal transform coefficients and attenuating or removing the non-essential orthogonal transform coefficients. In an MPEG bit stream, the encoded frame is an I-frame and the orthogonal transform coefficients are discrete cosine transform (DCT) coefficients.

Video data reduction in MPEG bit stream

In an embodiment of the invention, a method is provided for storing multimedia information to a medium. In another embodiment, a method is provided for retrieving multimedia information stored on a medium.

Storing and retrieving encoded data stream with specified time of delivery on a hard disk

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Fremont, CA, United States of America

Gaetano Bonfiglio