A method and apparatus are provided for dynamically allocated multiple slots within a multi-channel multi-carrier transmission system. The slots may be allocated sequentially or non-sequentially. The data transmission rate for each slot remains constant, while multiple slots may be allocated to a single...http://www.google.com.hk/patents/US6049551?utm_source=gb-gplus-share專利 US6049551 - Method and apparatus for dynamic allocation of transmission bandwidth resources and for transmission of multiple audio signals with a video signal