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OwnerEdouard Francois, Jérôme Vieron +1inventors
InventorsEdouard Francois, Jérôme Vieron, Nicolas Burdin
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The invention relates to a method of encoding and decoding video images with spatial scalability. The inventive method comprises the following steps consisting in: encoding (5) a low-resolution image, by performing a calculation of a local or reconstructed decoded image, in order to supply an encoded low-resolution image; oversampling (6) the reconstructed image in order to supply a prediction image; and encoding (7) a higher resolution image, comprising a difference calculation with the prediction image in order to supply residues. The invention is characterised in that the method also comprises a step consisting in selecting or calculating filter coefficients to be used for oversampling and a subsequent step consisting in encoding said coefficients such that they can be transmitted to the decoder with the other encoded data. The invention is suitable for hierarchical encoding with spatial scalability.
Coding method of video pictures with spatial scalability realising the coding of a first low resolution picture and of at least one second picture of higher resolution from the low resolution picture, the first picture having a common video part with the second picture, comprising
Decoding method of video pictures from a data stream comprising a base layer for the coding of a low resolution picture and at least one improvement layer for the coding of a higher resolution picture from residues, comprising
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