Method for recording and reproducing intercoded data using two levels of error correction
US5699473A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Oct 9, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/783
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital videotape recording and reproducing method increases the error correction capability for normal reproduction data by using an ECC3 area allocated in an intercoded signal during an outer coding procedure. The recording method divides the data into normal and trick reproduction data, and allocates an ECC3 area in a predetermined position of a data sync block in which the normal reproduction data area is recorded, and includes the steps of: first outer-code error-correction coding of the normal reproduction data after replacing the trick reproduction data and the ECC3 area data with a predetermined data pattern, thereby generating and adding outer parity data; second outer-code error-correction coding of the normal reproduction data after replacing the trick reproduction data coded in the first outer-code error-correction coding step with another predetermined data pattern thereby generating and adding ECC3 error-correction information in the ECC3 area; inner-code error-correction coding of each of the normal and the trick reproduction data coded by the second outer-code error-correction coding step; and modulating the normal and trick reproduction data and ECC3 area data, c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.