Systems for MPEG subsample decoding
US7016419B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 2004 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Jul 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Decimating MPEG or other video data by subsampling the output of an inverse discrete cosine transform (IDCT) module. The decimation process is useful for reducing the volume of data that must be processed to display images on a display device, particularly when the volume of video data received at the decoder is greater than the amount needed to take advantage of the resolution of the display device. For example, high definition television data can be decimated for display on a standard television display device or in a picture-in-picture window, thereby reducing the amount of processing resources needed at the decoder and reducing the size of the frame buffers. Subsampling the output of the IDCT module reduces the volume of data and, for relatively static or constant pans, there is not a significant compounded loss of image quality as successive frames are decoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.