Patent ID: 9313491
Filing Date: 2016-04-12
CPC Classification: H04N

Claim Text:
1. A video decoder, comprising: circuitry to retrieve from a compressed video stream a current slice of a picture encoded in the compressed video stream, set a chroma motion vector for a current block of the current slice equal to a luma motion vector for the current block, determine whether the current block is a field block, and when the current block is a field block, adjust the chroma motion vector based on one or more pre-computed chroma motion vector adjustment arrays for the current slice, the current slice comprising multiple macroblocks and one of the multiple macroblocks comprising the current block, the circuitry to determine whether the current slice is a macroblock adaptive frame field (MBAFF) slice when the current block is a field block, the circuitry to determine whether the current block is a top block or a bottom block when the current slice is an MBAFF slice and the current block is a field block, and the circuitry to adjust the chroma motion vector based on top parameters comprised in a first pre-computed chroma adjustment array for a first reference list for the current slice and on top parameters comprised in a first pre-computed chroma adjustment array for a second reference list for the current slice when the current slice is an MBAFF slice and the current block is a top block.