US 10,313,719 B2 · Video stream splicing

Abstract

A video splicer combines a first video stream, encoded in accordance with a block based coding algorithm, with a second video stream. A header processor detects a key position picture in each of a plurality of sequential GOPs of the first stream and determines a presentation time for each key position picture in each GOP in the first stream. A timing mapper identifies a respective image in the second stream having a presentation time corresponding to a key position picture of the first stream. An encoder encodes the second stream in accordance with the block based coding algorithm. A new GOP is started with the respective image in the second stream having a presentation time corresponding to the key position picture of the first stream. A switcher switches between outputting the first stream and the encoded second stream by a signal from the timing mapper.

Claims20

Dependent claims

A video splicer apparatus for combining a first video stream with a second video stream, said video splicer comprising:

a header processor detecting a key position picture in each of a plurality of sequential groups of pictures of said first video stream and to determine a presentation time of each said key position picture in each group of pictures in said plurality of sequential groups of pictures of said first video stream, wherein said first video stream is encoded in accordance with a block based coding algorithm;
a timing mapper identifying a respective image in said second video stream having a presentation time corresponding to one said key position picture of said first video stream;
an encoder encoding said second video stream in accordance with said block based coding algorithm, whereby a new group of pictures is started with said respective image in said second video stream having a presentation time corresponding to said key position picture of said first video stream;
and
a switcher switching between outputting said first video stream or said encoded second video stream, wherein said switching is triggered by a signal from said timing mapper indicating the start of a new group of pictures in a selected stream, wherein said selected stream may one or more of said first video stream and said encoded second video stream.

2 more elements

Dependencies are inferred from the claim text.

Video stream splicing

Life of this patent

Video stream splicing

Life of this patent

Abstract

Claims20