ENCODING AND DECODING A SEQUENCE OF PICTURES

ENCODING AND DECODING A SEQUENCE OF PICTURES

An apparatus for decoding a sequence of pictures from a data stream is configured for decoding a picture of the sequence by deriving a residual transform signal of the picture from the data stream; combining a residual transform signal with a buffered transform signal approximation of a previous pic...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KEINERT, Joachim, AHMED, Bilal, HEPPNER, Wolfgang, MINUTH, Christian, FÖßEL, Siegfried, SCHERL, Christian, RICHTER, Thomas, SPARENBERG, Heiko, THOMA, Herbert, BHASKAR, Nisha
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:An apparatus for decoding a sequence of pictures from a data stream is configured for decoding a picture of the sequence by deriving a residual transform signal of the picture from the data stream; combining a residual transform signal with a buffered transform signal approximation of a previous picture of the sequence so as to obtain a transform signal representing the picture, the transform signal comprising a plurality of transform coefficients; and subjecting the transform signal to a spectral-to-spatial transformation. The apparatus is configured for deriving the buffered transform signal approximation from a further transform signal representing the previous picture so that the buffered transform signal approximation comprises approximations of further transform coefficients of the further transform signal.