Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Stephanus J J Nijssen

Peter H N De With

Johan P M G Linnartz

Emmanuel D L M Frimout

An MPEG-encoded video signal includes groups of pictures (GOPs), each GOP having an intraframe coded (I) picture and a series of predictively encoded (P) pictures and bidirectionally predictively encoded (B) pictures. Usually, the GOP structure IBBPBBP . . . is used. However, in order to embed a watermark in the MPEG-encoded video signal, the MPEG encoder is forced to produce a GOP structure which does not normally occur, e.g., a GOP including a BPP sequence. Different symbol values can be assigned to different positions of the BPP sequence in the GOP.

Embedding supplemental data in a digital video signal

Device for transmitting television pictures in the form of transform coefficients and motion vectors. The motion vectors of a sub-picture are converted ( ) into a series of difference vectors and a reference vector. The series is subsequently applied to a variable-length encoder ( ) which encodes a run of zero values and a subsequent non-zero value into a code word of variable length. The variable-length encoder may be the same as the encoder which encodes the coefficients.

Device for transmitting television pictures and device for receiving said pictures

A method and apparatus wherein video images are recorded on a plurality of tracks of a tape such that, for playback in a search mode at a speed higher than the recording speed the displayed image will consist of a plurality of contiguous parts, some of the parts being read out from tracks each having a different frame recorded thereon.

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Eindhoven, Netherlands

Stephanus J J Nijssen