Parameterized filters and signaling techniques
US8107571B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2007 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2017/0297
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Filter taps for filters are specified by filter coefficient parameters. The filter taps are greater in number than the coefficient parameters from which the filter taps are calculated. For example, two coefficient parameters are used to specify a four-tap filter. Filter information can be signaled in a bitstream, such as by signaling one or more family parameters for a filter family and, for each filter in a family, signaling one or more filter tap parameters from which filter taps can be derived. Family parameters can include a number of filters parameter, a resolution parameter, a scaling bits parameter, and/or a full integer position filter present parameter that indicates whether or not the filters include an integer position filter. Filter parameters can be signaled and used to determine coefficient parameters from which filter taps are calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.