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US 2002/0118957 A1Published application
Apparatus and method for playing back video
AssigneeInternational Business Machines Corporation
InventorsMasahiro Hori, Yoshifumi Sakamoto
Life of this patent
Estimating the term…
Abstract
To prevent unauthorized copying of video data transmitted from an MPEG-2 decoder to an NTSC encoder, data format of video data to be transmitted from an MPEG-2 decoder to an NTSC encoder is dynamically changed (S104, S112, and S118).
Claims20
A video playback apparatus comprising:
- a playback decoder for decoding video data encoded by a predetermined encoding system;
- a display encoder for encoding the decoded video data into a display signal to be output to a display device;
- format setting means for setting a data format for the video data to be transmitted from the playback decoder to the display encoder;
- and
- format changing means for changing the data format set by the format setting means.
2 more elements
A method for playing back video data comprising the steps of:
- setting a data format for video data;
- decoding video data encoded by a predetermined encoding system into video data whose data format is set by the format setting step;
- encoding the decoded video data into a display signal to be output to a display device;
- and
- changing the data format set by the format setting step.
2 more elements
A method of protecting decoded digital data sent with a data format from a video decoder to a display encoder, the display encoder providing a display signal to a display device, the method comprising the steps of:
- dynamically changing the data format in which the video decoder provides decoded data to the display encoder;
- and
- updating the display encoder with the data format used by the video decoder in providing decoded data.
Dependencies are inferred from the claim text.