METHODS AND APPARATUS OF VIDEO DECODING USING LOW COMPLEXITY TRELLIS-CODED QUANTIZATION

摘要

A computing device performs a method of decoding video data by receiving a quantized block comprising a plurality of sub-blocks ordered in a first scanning direction, wherein each of the plurality of sub-blocks comprises a respective plurality of quantized coefficients ordered in a respective second scanning direction; partitioning the quantized block into a plurality of quantization groups, wherein each of the plurality of quantization groups comprises a respective plurality of continuously-ordered sub-blocks based on the first scanning direction; identifying a number of quantization groups that satisfies a first condition, wherein the identified quantization groups satisfy the first condition when the respective plurality of continuously-ordered sub-blocks of the identified quantization group are within a predefined range of the first scanning direction; and performing, in parallel, a respective Trellis-coded quantization (TCQ) decoding process on each of the respective plurality of the identified quantization groups.