Single channel method and apparatus for automatically optimizing insert editing in a signal recorder
US5416649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1994 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Jul 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/1875
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A single channel circuit and method for the automatic edit optimization of a recording medium which is operable with a recorder such as a video tape recorder or a disc recorder utilizes the difference between signal outputs from an automatic scan tracking playback head and a record, head to provide a difference signal indicative of the rf amplitude fluctuations caused by scene or data pattern variations of the data stored on the recording medium. A correction signal corresponding to the difference signal is stored, and used as a feedback signal to normalize the gain of a variable gain amplifier. The single channel is switched at a predetermined rate between circuitry coupled to the automatic scan tracking playback head and circuitry coupled to the record head in order to obtain rf amplitude samples from both heads to develop the correction signal. Thereby, the correction signal allows a precise edit optimize so that a subsequent edit operation such as an insert edit can be precisely performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.