Method and apparatus for diagonal scan and simplified coding of transform coefficients

摘要

A method and apparatus for encoding video data. At least a portion of a two dimensional array of transform coefficients representing a portion of video data is re-ordered to a one dimensional array of data by diagonally scanning the portion in at least two scan lines. Each scan line directed in a single common diagonal direction. Syntax elements representing at least a portion of the one dimensional array of data are then coded and transmitted.

主权项

1. A method of encoding video data comprising:
providing a two dimensional array of transform coefficients representing a portion of video data; determining a location of a last significant transform coefficient; re-ordering at least a portion of the two dimensional array of transform coefficients to a one dimensional array of data by diagonally scanning the portion in at least two scan lines, each scan line directed in a single common diagonal direction; generating a significance map comprising syntax elements indicating the location of the last significant transform coefficient and locations of additional non-zero transform coefficients in the one dimensional array; representing at least a portion of the one dimensional array of data using a series of additional syntax elements; coding the significance map syntax elements; coding the series of additional syntax elements; and transmitting the coded significance map syntax elements, and the arithmetic coded series of additional syntax elements.