The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Sep. 04, 2024
Tencent America Llc, Palo Alto, CA (US);
Tencent America LLC, Palo Alto, CA (US);
Abstract
In a method for video decoding in a decoder, coded information of a coding unit (CU) is decoded from a coded video bitstream. The coded information indicating a last position of non-zero transform coefficients of a first coding block (CB) of the CU. Whether a secondary transform index is signaled in the coded information is determined based on whether the last position of non-zero transform coefficients indicates that the first CB of the CU has only zero coefficients or only one nonzero coefficient at the last coefficient position, wherein the secondary transform index is determined to be not signaled in the coded information when the last position of non-zero transform coefficients indicates that the first CB of the CU has only zero coefficients or only one nonzero coefficient at the last coefficient position. Whether to perform a secondary transform on a second CB of the CU is determined.