US 5,515,107 AGranted

Method of encoding a stream of motion picture data

AssigneeSigma Designs, Inc.

InventorsChen-Huei Chiang, Yann LeComec

Life of this patent

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Abstract

Methods of encoding and decoding data in variable-length data structures, such as that found in motion picture data. Data in an MPEG standard format may be encoded in a format which is not easily subject to unauthorized copying, but which may be easily displayed in a real-time video and audio display. The encoded data may be less subject to errors in data distribution and data storage than known methods of data transformation. Encoded data may be multiplexed with non-encoded data, or may be multiplexed with data encoded by another technique, in such manner that recovery of the original motion picture video and audio may still be achieved in real time. The degree of encoding may take on differing values, so that, for example, all motion picture data is encoded for one video clip, while only some of data is encoded for a second video clip.

Claims8

Dependent claims

A method of encoding a stream of motion picture data, comprising

identifying, in a stream of motion picture data, a set of data relating to a display timing signal for said motion picture data;
altering said data relating to a display timing signal with a first encoding function;
identifying a set of video data and a set of audio data in said motion picture data;
altering said motion picture data so that said video data and said audio data are substantially synchronized;
identifying, in said motion picture data, a set of data relating to a set of frame dimensions and a frame repetition rate for said motion picture data;
altering said data relating to a set of frame dimensions and a frame repetition rate with a second encoding function;
identifying, in said motion picture data, a set of data relating to a broken-link signal relating to a video clip in which a next frame does not present smooth motion from a previous frame;
and
altering said data relating to a broken-link signal with a third encoding function.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/220,713Filed 30 Mar 1994
Granted: 7 May 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04N 21/4341
Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream;…:…
H04N 7/1675
Systems rendering the television signal unintelligible and subsequently intelligible: providing digital key or authorisation information for…
H04N 19/114
Selection of coding mode or of prediction mode: adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames
H04N 19/115
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: selection of the code volume for a coding unit…