Invention Grant
- Patent Title: Methods for reconstructing an encoded video at a bit-depth lower than at which it was encoded
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Application No.: US13858852Application Date: 2013-04-08
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Publication No.: US09674538B2Publication Date: 2017-06-06
- Inventor: David Flynn
- Applicant: BlackBerry Limited
- Applicant Address: CA Waterloo
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: CA Waterloo
- Agency: Ridout & Maybee LLP
- Main IPC: H04N19/30
- IPC: H04N19/30 ; H04N19/61 ; H04N19/124

Abstract:
Methods are provided for reconstructing d-bit samples from coefficients, in an encoded video bit-stream, that had been encoded based on source samples having a bit-depth D, where D>d. A residual process, including inverse-quantization and inverse-transformation processes, is applied to the coefficients to compute (D+1)-bit residual samples. Then a prediction process, including (i) rounding and/or truncating intermediate samples and (ii) subsequently clipping intermediate samples, is applied to the residual samples to compute d-bit reconstructed samples.
Public/Granted literature
- US20140301448A1 METHODS FOR RECONSTRUCTING AN ENCODED VIDEO AT A BIT-DEPTH LOWER THAN AT WHICH IT WAS ENCODED Public/Granted day:2014-10-09
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