Device and method for determining a quantiser step size
CA 2557777 C · Owner: Rettelbach, Nikolaus · Inventors: Rettelbach, Nikolaus; Grill, Bernhard; Schug, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For determining a quantizer step size for quantizing a signal comprising audio or video information a first, quantizer step size as well as an interference threshold are provided (502). Then, the actual interference introduced by the first quantizer step size is determined (504) and compared with the interference threshold (506). Despite the fact that the comparison reveals that the actually introduced interference exceeds the threshold a, second, coarser quantizer step size is nevertheless used (508), which will then be used for quantization (514) if it turns out that the interference introduced by the coarser second quantizer step size falls below the threshold or falls below the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 17, 2005 and granted July 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.