View All Patents
EP4258663
MULTIPLE SIGN BIT HIDING WITHIN A TRANSFORM UNIT
Filed
Jan 20, 2012
Technology
Electrical engineering · Audio-visual technology
UPC cases
2
Ownership history
As recorded at the EPO. Transfers made after the opposition period are recorded in national registers and may be missing here.
- Velos Media International Limitedsince Sep 8, 2023; EPO record ends Aug 8, 2025
Abstract
Methods of encoding and decoding for video data are described for encoding or decoding coefficients for a transform unit. In particular, the sign bits for the non-zero coefficients are encoded using sign bit hiding. Two or more sets of coefficients are defined for the transform unit and a sign bit may be hidden for each set, subject to satisfaction of a threshold test. The sets may correspond to coefficient groups that are otherwise used in multi-level significance map encoding and decoding.
Litigation history
| Date | Case | Division | Type | Outcome | Parties |
|---|---|---|---|---|---|
| Sep 9, 2026 | UPC CFI 3242/2026 | Munich LD | Counterclaim for revocation | Locked | Hisense Visual Technology Co., Ltd. +6 |
Additional proceedings on this patent
Start 14-day free trialOutcomes, the additional proceedings and the register history.Already a user? Sign in