Recording and editing HDTV signals
US6614989B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1999 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Jul 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8047
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for compressing an HDTV signal (1) in such a manner that it can be recorded and edited with SDTV equipment (4,5). More particularly, the HDTV signal is recorded on digital recorders (e.g. DVCPRO) which have been designed for recording compressed SDTV signals. A sub-sampled version of the HDTV signal is recorded in first locations (20) of compressed macroblocks in a manner complying with the relevant SDTV recording format. The HDTV signal is compressed (2) and formatted (3) for being recorded in further locations (21). Between said first and further locations, an end-of-block code (28) is recorded so that the recorder (4) will ignore the HDTV data. Upon playback, a recognizable version of the sub-sampled HDTV signal is displayed on an SDTV receiver (5). Readily available SDTV equipment can thus be used for HDTV editing. In one embodiment of the invention, the sub-sampled HDTV signal consists of selected DC coefficients. The corresponding SDTV version is a full-screen but low-resolution image (FIG. 5B). In another embodiment, the HDTV signal is first sub-sampled in the pixel domain and separately encoded. The corresponding SDTV version is displayed at the normal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.