| 摘要 |
<p>A decoder (10) for decoding CCITT compressed image data separates all the incoming codes into short codes and long codes, the short codes being sent to a short channel decoder (25), and the long codes being sent to a long channel decoder (28). At each decoding cycle either the long channel decoder or the short channel decoder is active. The short channel decoder has a twin set decoder (36) which decodes two short codes in parallel and guarantees two bits of decompressed data per decoding cycle. If the decoding of a first code generates a decompressed data of only one bit, then the decompressed data of a second code will be combined with the first decompressed data and the combination will be sent out. The long channel decoder decodes the long intermediate codes, which always generate at least four bits of decompressed data. <IMAGE></p> |
