Patent ID: 6724436
Filing Date: 2004-04-20
Classification: H04N

Abstract:
A video signal processor comprising:a first input for receiving a compressed first video signal representing first video information including transcoding parameters associated with the pictures of the signal and relating to the compression of said first video signal, a decoder for decoding the compressed first video signal whilst preserving the parameters in association with the pictures, a second input for receiving a second video signal representing second video information to be combined with the said first video information, a combiner for combining the second video information with the fist video information to produce a picture of the combined information, comprising at least one part derived only from the first signal and at least one other part derived at least partly from the second signal, whereby the combined information picture is a mix of pixels from the first and second signals, and an encoder for compression encoding the said picture to produce a combined signal representing the combined information, which encoder reuses at least one of the said preserved parameters for encoding at least the said at least one part of the combined information which is derived only from the first signal.