Rather than comparing an old file with a new file to generate a set of patching instructions, and then compressing the patching instructions to generate a compact patch file for transmission to a user, a patch file is generated in a single operation. A compressor is pre-initialized in accordance with...http://www.google.com.tw/patents/US6449764?utm_source=gb-gplus-share專利 US6449764 - File update by pre-initializing compressor/decompressor with other than decompression aid data
