Patent ID: 8873624

Claim:
An apparatus for decoding a coded video sequence having a base scaling layer and an enhancement scaling layer, comprising: a base picture decoder configured for decoding the base scaling layer to obtain a decoded base sequence of residual error pictures and base layer motion data, the base layer motion data indicating how a macroblock in a current picture has moved in relation to another picture in a group of pictures; an enhancement picture decoder configured for decoding the enhancement scaling layer to obtain enhancement layer prediction residual error pictures; an intermediate layer combiner configured for combining the decoded base sequence of residual error pictures or an interpolated base sequence of residual error pictures with the enhancement layer prediction residual error pictures to obtain an enhancement sequence of residual error pictures; and an enhancement motion combiner configured for obtaining a sequence of pictures of the enhancement scaling layer by using the enhancement sequence of residual error pictures and enhancement layer motion data, wherein the pictures of the base scaling layer have a lower resolution than the pictures of the enhancement scaling layer, wherein the apparatus further comprises a residual value interpolator to interpolate the decoded base sequence of residual error pictures to the higher resolution, wherein the base picture decoder is formed to dequantize by using a base quantization parameter which is larger than an enhancement quantization parameter, and wherein the intermediate layer combiner is formed to use the decoded base sequence of residual error pictures or an interpolated version of the same.