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- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 11212,557
- Publication Date: December 28, 2021
- Appl. No: 16/049543
- Application Filed: July 30, 2018
- Assignees: TEXAS INSTRUMENTS INCORPORATED (Dallas, TX, US)
- Claim: 1. A method for sample adaptive offset (SAO) filtering in a video encoder, the method comprising: receiving, in an SAO parameter estimator coupled to a deblock filter and to a prediction compensation component, deblock filtered reconstructed pixels and non-deblock filtered reconstructed pixels of a coding unit (CU) of a picture; estimating SAO parameters in the SAO parameter estimator for color components of the CU, wherein the SAO parameters are based on deblock-filtered reconstructed pixels and non-deblock-filtered reconstructed pixels of the CU, and wherein the estimated SAO parameters are based on a variable number of rows or columns of non-deblock-filtered reconstructed pixels of the CU, and the variable number is determined in response to at least one of a SAO filter type and a color component; performing SAO filtering on reconstructed CU pixels according to the estimated SAO parameters; and entropy encoding SAO information for the CU in a compressed video bit stream, wherein the SAO information signals the estimated SAO parameters for the CU.
- Claim: 2. The method of claim 1 , wherein the at least some non-deblock-filtered reconstructed pixels consist of reconstructed pixels from bottom lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 3. The method of claim 1 , wherein the at least some non-deblock-filtered reconstructed pixels consist of reconstructed pixels from right column lines of reconstructed pixels and bottom lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 4. The method of claim 1 , wherein the at least some non-deblock-filtered reconstructed pixels consist of all reconstructed pixels of the CU, wherein the reconstructed pixels are not deblock filtered.
- Claim: 5. The method of claim 1 , wherein the at least some non-deblock-filtered reconstructed pixels comprises reconstructed pixels from at least some left column lines of reconstructed pixels of the CU and at least some top lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 6. An apparatus configured to perform sample adaptive offset (SAO) filtering during encoding of a video sequence, the apparatus comprising: means for deblock filtering reconstructed pixels of a coding unit (CU) of a picture; means coupled for receiving deblock filtered reconstructed pixels of the CU and receiving non-deblock filtered reconstructed pixels of the CU for estimating SAO parameters for color components of the CU, wherein the SAO parameters are based on deblock-filtered reconstructed pixels and non-deblock-filtered reconstructed pixels of the CU; and wherein the estimated SAO parameters are based on a variable number of rows or columns of non-deblock-filtered reconstructed pixels of the CU, and the variable number is determined in response to at least one of a SAO filter type and a color component; means for performing SAO filtering on reconstructed pixels of the CU according to the estimated SAO parameters; and means for entropy encoding SAO information for the CU in a compressed video bit stream, wherein the SAO information signals the estimated SAO parameters for the CU.
- Claim: 7. The apparatus of claim 6 , wherein the at least some non-deblock-filtered reconstructed pixels consist of reconstructed pixels from bottom lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 8. The apparatus of claim 6 , wherein the at least some non-deblock-filtered reconstructed pixels consist of reconstructed pixels from right column lines of reconstructed pixels and bottom lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 9. The apparatus of claim 6 , wherein the at least some non-deblock-filtered reconstructed pixels consist of all reconstructed pixels of the CU, wherein the reconstructed pixels are not deblock filtered.
- Claim: 10. The apparatus of claim 6 , wherein the at least some non-deblock-filtered reconstructed pixels comprise reconstructed pixels from one or more left column lines of reconstructed pixels of the CU and one or more top lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 11. A non-transitory computer-readable medium storing software instructions that, when executed by at least one processor, cause the at least one processor to execute a method for sample adaptive offset (SAO) filtering during encoding of a video sequence, the method comprising: deblock filtering reconstructed pixels of a coding unit (CU) of a picture; receiving deblock filtered reconstructed pixels and non-block filtered reconstructed pixels of the CU in an SAO estimator; estimating SAO parameters for color components of the CU by the SAO estimator, wherein SAO parameters are based on deblock-filtered reconstructed pixels and some non-deblock-filtered reconstructed pixels of the CU to estimate the SAO parameters, and wherein the estimated SAO parameters are based on a variable number of rows or columns of non-deblock-filtered reconstructed pixels of the CU, and the variable number is determined in response to at least one of a SAO filter type and a color component; performing SAO filtering on the reconstructed CU according to the estimated SAO parameters; and entropy encoding SAO information for the CU in a compressed video bit stream, wherein the SAO information signals the estimated SAO parameters for the CU.
- Claim: 12. The non-transitory computer-readable medium of claim 11 , wherein the at least some non-deblock-filtered reconstructed pixels consist of reconstructed pixels from bottom lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 13. The non-transitory computer-readable medium of claim 11 , wherein the at least some non-deblock-filtered reconstructed pixels consist of reconstructed pixels from right column lines of reconstructed pixels and bottom lines of reconstructed pixels of the CU that are not deblock filtered.
- Claim: 14. The non-transitory computer-readable medium of claim 11 , wherein the at least some non-deblock-filtered reconstructed pixels consist of all reconstructed pixels of the CU, wherein the reconstructed pixels are not deblock filtered.
- Claim: 15. The non-transitory computer-readable medium of claim 11 , wherein the at least some non-deblock-filtered reconstructed pixels comprises reconstructed pixels from at least some left column lines of reconstructed pixels of the CU and at least some top lines of reconstructed pixels of the CU that are not deblock filtered.
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No. 13/784,599, from Mar. 4, 2013 to Jul. 13, 2018 (381 pages). cited by applicant
- Primary Examiner: Fereja, Samuel D
- Attorney, Agent or Firm: Abraham, Ebby ; Brill, Charles A. ; Cimino, Frank D.
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