Nvidia Corporation

Ram Prabhakar

Lefan Zhong

Cahide Kiris

Neal Meininger

Ed Ahn

Harikrishna Madadi Reddy

Wei Sun

Leonardo Vainsencher

Visalakshi Vaduganathan

A dynamic AC prediction technique is implemented in a data partition mode which automatically disables AC prediction for encoding the current macroblock in the next packet when packet overflow occurs. Otherwise, when there is no overflow, AC prediction remains enabled to maintain compression efficiency. More particularly, in the preferred embodiment, a determination is first made whether a macroblock causes a packet overflow if it is encoded in the current packet. If so, a new packet is initiated into which the macroblock is encoded without AC prediction as the first macroblock. Otherwise, the macroblock with AC prediction remains in the current packet and a new macroblock is encoded.

Dynamic packet size control for MPEG-4 data partition mode

A more efficient motion estimation process that utilizes a plurality of predicted start points (e.g., two predicted start points) based on blocks adjacent to the current block together with other improvements and requires minimal system resources (e.g., hardware resources and CPU processing) in its hardware implementation is provided. More particularly, the motion estimation technique in accordance with the present invention performs a plurality of coarse searches (either sequentially or in parallel) using a plurality of predicted start positions followed by a fine search.

MPEG motion estimation based on dual start points

A VLC data transfer interface is presented that allows digital data to be packed and assembled according to a format selectable from a number of formats while the data is being transferred to a desired destination.

Variable-length coding data transfer interface

Growing community of inventors

Palo Alto, CA, United States of America

Ram Prabhakar