System and method to detect garbled closed captioning
US9154816B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2014 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Dec 4, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2017/008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A garbled closed captioning detector analyzes closed captioning data at predetermined intervals to determine whether a metric derived from the closed-captioning data exceeds a threshold. If the metric exceeds the predetermined threshold, the closed captioning data is presumed to be garbled. For example, the metric may be the percentage of words in the closed captioning data having a desired word length observed in a particular interval compared to all words in the closed captioning data observed in the interval. If the percentage of words having a desired word length exceeds a predetermined threshold, the closed captioning data is presumed to be garbled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.