Record and playback device
US6810198B1 · kind B1 · utility
4Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2000 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Jan 2, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A number of outer parities to be added to an audio data is changed responsive to a ratio of frame frequencies of a video signal (e.g. 24 Hz or 30 Hz) before the data is recorded. Comparing with a first format, a recording bit rate is increased in a second format. Audio 4 channels (audio sectors 5-8) are additionally recorded maintaining a video data format (video sectors 1, 2) of the first format and an audio data format (audio sectors 1-4) of the first format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.