Nvidia Corporation

Yiu Cheong Ho

Harikrishna Madadi Reddy

Hideo Ohira

Ignatius B Tjandrasuwita

Prahlad Venkatapuram

Eric Kwong-Hang Tsang

Cheng-Chiang Chen

For encoding, a frame of video data can be segregated into macroblocks, which can be segregated into slices, which in turn can be segregated into slice groups. A macroblock identifier (ID) can be associated with each of the macroblocks. When at least one slice from each of the slice groups has been encoded, the macroblock IDs associated with the encoded slices can be compared to determine an order in which the encoded slices are to be placed in an access unit for the frame. Of the encoded slices, the slice that includes the macroblock with the lowest macroblock ID will be placed in the access unit before the other encoded slices.

Slice ordering for video encoding

A method and system for adaptive matrix trimming in an inverse discrete cosine transform (IDCT) operation. At least one row of an input matrix is accessed. At least one matrix element of the row having a value of zero is detected. During execution of an IDCT multiplication operation on the row for generating an output row, IDCT multiplication operation for a matrix element having a value of zero is skipped.

Method and system for adaptive matrix trimming in an inverse discrete cosine transform (IDCT) operation

Described are methods and systems for variable length decoding. A first execution unit executes a first single instruction that optionally reverses the order of bits in an encoded bitstream. A second execution unit executes a second single instruction that extracts a specified number of bits from the bitstream produced by the first execution unit. A third execution unit executes a third single instruction that identifies a number of consecutive zero bit values at the head of the bitstream produced by the first execution unit. The outputs of the first, second and third execution units are used in a process that decodes the encoded bitstream.

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Fremont, CA, United States of America

Yiu Cheong Ho