Closed-caption broadcasting and receiving method and apparatus thereof suitable for syllable characters
US6256072A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1997 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A closed-caption broadcasting and receiving method and apparatus. According to the closed-caption broadcasting method and apparatus, additional information is inputted and the input of word information is checked. If the word information is inputted, it is selected, while if not, the additional information is selected. Thereafter, character information and control information of the selected information are inputted. A control code of 2 words is obtained by combining the control information with a mode control bit and a parity bit, and the character code of 2 words including a syllable character completion type code is obtained by combining the character information with a mode control bit and a parity bit. A digital-modulated caption signal is produced by inputting the control code and the character code, and is coded in a scanning line which does not affect a television video signal to be transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.