Closed-caption broadcasting and receiving method and apparatus thereof suitable for syllable characters
US6295093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1997 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4884
- 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, character information and control information are inputted, and a control code of 2 words and a character code of 2 words including a syllable character completion type code are produced. The control code is obtained by combining the control information with a mode control bit and a parity bit, and the character 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 on 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.