APPARATUS AND METHOD FOR CODING A GROUP OF SUCCESSIVE PICTURES, AND APPARATUS AND METHOD FOR DECODING A CODED PICTURE SIGNAL

摘要

For coding a group of successive pictures, a filterbank decomposition is used which comprises a second filter level (12) for producing a first high-pass picture of the second level and a first low-pass picture of the second level from the first and second pictures of the group of pictures, and for producing a second high-pass picture of the second level and a second low-pass picture of the second level from the third and fourth pictures of the original group of pictures. The encoder further includes a first filter level (20) for producing a first high-pass picture of the first level and a first low-pass picture of the first level from the first and second low-pass pictures of the second level, as well as further-processing means (26) for further processing the first high-pass picture of the first level and the first low-pass picture of the first level to obtain a coded picture signal, the first further-processing means including a quantizer which has a quantizer step size. The coded picture signal represents a base scaling layer with regard to temporal scaling. The group-wise picture processing and decomposition into high-pass and low-pass signals further enables SNR scalability implementation.