Method and Apparatus for Arithmetic Decoding

摘要

An apparatus and method for high-throughput entropy decoding in a video decoder are disclosed. The apparatus comprises an arithmetic decoding processing circuitry and a variable-length decoder (VLD). The arithmetic decoding processing circuitry receives a video bitstream through a bitstream input, applies arithmetic decoding to at least a portion of the video bitstream to derive one or more arithmetic-decoded binary strings containing no arithmetic encoded binary string, and stores the arithmetic-decoded binary strings in the storage device. The variable-length decoder (VLD) is coupled to the arithmetic decoding processing circuitry, the storage device and a VLD output. The variable-length decoder receives at least a portion of arithmetic-decoded bitstream when arithmetic-decoded bitstreams stored in the storage device are complete for a selected image unit, decodes at least a portion of arithmetic-decoded bitstream into one or more decoded syntax elements, and provides the decoded syntax elements through the VLD output.

主权项

1. A method of entropy decoding for binary strings coded using variable length coding and arithmetic coding a video decoder, the method comprising:
receiving input data for a video bitstream associated with video data; applying arithmetic decoding to at least a portion of the video bitstream to derive one or more arithmetic-decoded binary strings, wherein said one or more arithmetic-decoded binary strings contains no arithmetic encoded binary string; storing said one or more arithmetic-decoded binary strings in a memory; receiving at least a portion of arithmetic-decoded bitstream from the memory for a variable-length decoder (VLD) when arithmetic-decoded bitstreams stored in the memory are complete for a selected image unit, wherein the arithmetic-decoded bitstream comprises arithmetic-decoded binary strings for the selected image unit; and decoding said at least a portion of arithmetic-decoded bitstream into one or more decoded syntax elements.