Patent · US Active

Method and apparatus for replaying a video signal and one or more audio signals related to audio/video data that are based on a 24Hz frame frequency video signal

US8244094B2 · kind B2 · utility

5Cited by

7References

14Claims

0Family size

Assignee

Thomson Licensing · FR

Inventors

Marco Winter · Hannover, DE
Hartmut Peters · Barsinghausen, DE
Johannes Boehm · Göttingen, DE
Ernst F. Schroeder · Hannover, DE

Key dates

Filing date	Jan 24, 2006
Grant date	Aug 14, 2012
Priority date	—
Expiry date	Feb 1, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04N9/8227
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Movies are produced in 24 Hz frame frequency and progressive scanning format (denoted 24p) for projection in film theatres, adhering to a worldwide standard for 35 mm film. However, the major TV systems in the world use interlaced scanning and either 50 Hz field frequency (denoted 50i) or 60 Hz field frequency (denoted 60i). Content providers would prefer providing single-picture-frequency single-audio-speed AV discs that can be replayed in most parts of the world. According to the invention, For a 50 HZ output mode, in the media player either audio signal frames are dropped adaptively or video fields or frames are repeated adaptively, depending on the current video and audio content. Thereby the less perceptible stream controls the synchronization.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.