| 摘要 |
<p>An image data decoding system (2) is described in which a stream of compressed image data (1) corresponding to a plurality of channels each comprising intra-coded pictures (I) and inter-coded pictures (B, P) is received. A selected channel within the plurality of channels is fully decoded to produce display driving data. At least one non-selected channel is at least partially processed by the system even though it is not being displayed such that if a switch is made to that non-selected channel then display driving data for that newly selected channel can be produced without having to wait for the next intra-coded picture to be received. The partial processing may be merely buffering the compressed data for the non-selected channel. Alternatively, reference pictures or all pictures for the non-selected channel may be either fully decoded, or partially decoded to produce spatially sub-sampled versions of the pictures of the non-selected channels.</p> |
